Rebel branch #10

rebx · 2013-04-09T08:15:04Z

It seems like the parse method does not escape characters properly before split is invoked on the uri. It causes it to throw an InvalidURI error on URIs like

'http://foo:foo,<@foo.com:8080'

A test case has been added for the example uri at commit b280822

To address the situation, I have added a call to escape before the split is invoked.

I am not entirely sure this is the best way to fix this matter, so feel free to comment on the matter. Please reject the patch if it's not necessary/useless/irrelevant.

This may be similar to http://bugs.ruby-lang.org/issues/1466

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@28753 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

This fixes build failure on MSVC. [ruby-core:31481] * include/ruby/ruby.h, include/ruby/missing.h: use BROKEN_CLOSE for replacing close(2). git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@28754 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

iseq. [ruby-dev:41880] git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@28755 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

This needs to merge to 1.9.2. git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@28756 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

to include only once, before including defines.h. including it here breaks some macro definitions. git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@28757 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@28758 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

* win32/Makefile.sub, bcc32/Makefile.sub (config.h): ditto. git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@28759 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

pathname.rb. git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@28760 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@28761 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

clean unused-value warnings. * cont.c, process.c, vm_exec.h: clean cast warnings. git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@28762 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@28763 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

config.h and defines.h for autoconf macros. git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@28764 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@28765 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

reconfigure. git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@28766 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

(path_untaint): Pathname#untaint translated from pathname.rb. git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@28767 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

* cont.c: (RB_PAGE_MASK): renamed from PAGE_MASK. git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@28768 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@28769 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@28770 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@28771 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

* include/ruby/missing.h: need to include stddef.h for size_t. * include/ruby/missing.h: shouldn't declare as dllimport when building ruby itself (for Windows). git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@28772 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

…pper. git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@28774 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@28775 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

from pathname.rb. git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@28776 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@28777 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@28778 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@28779 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@28780 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

from pathname.rb. git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@28783 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@28789 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@28790 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

shyouhei · 2019-02-12T09:57:40Z

Let me close this ages ticket. If you still need this file another one at https://github.com/ruby/ruby

GC.stress unveils that an ivptr allocated using transient heap gets marked right before it evacuates to normal heaps (the evacuation itself triggers GC). Should fill something beforehand. ================================================================= ==60984==ERROR: AddressSanitizer: use-after-poison on address 0x7f0fcfdf0020 at pc 0x55bdaad55381 bp 0x7fffcddc0910 sp 0x7fffcddc0908 READ of size 8 at 0x7f0fcfdf0020 thread T0 #0 0x55bdaad55380 in gc_mark_children gc.c:5063:39 #1 0x55bdaad6b7c2 in gc_mark_stacked_objects gc.c:5156:9 #2 0x55bdaad6cb1a in gc_mark_stacked_objects_all gc.c:5196:12 #3 0x55bdaad6a180 in gc_marks_rest gc.c:6109:2 #4 0x55bdaad6ef51 in gc_marks gc.c:6169:6 #5 0x55bdaad63bfd in gc_start gc.c:6974:2 #6 0x55bdaad4fa73 in garbage_collect gc.c:6869:12 #7 0x55bdaad7866e in garbage_collect_with_gvl gc.c:7127:9 #8 0x55bdaad784d6 in objspace_malloc_gc_stress gc.c:9270:9 #9 0x55bdaad56f29 in objspace_xmalloc0 gc.c:9416:5 #10 0x55bdaad56ef2 in ruby_xmalloc2_body gc.c:9623:12 #11 0x55bdaad615dc in ruby_xmalloc2 gc.c:11479:12 #12 0x55bdab26a601 in obj_ivar_heap_alloc variable.c:1405:18 #13 0x55bdab27a35b in obj_ivar_heap_realloc variable.c:1418:23 ruby#14 0x55bdab26ac98 in obj_ivar_set variable.c:1490:26 ruby#15 0x55bdab2621fd in rb_ivar_set variable.c:1513:16 ruby#16 0x55bdab2e841d in vm_setivar vm_insnhelper.c:1118:12 ruby#17 0x55bdab2ecca4 in vm_setinstancevariable vm_insnhelper.c:1130:5 ruby#18 0x55bdab28113c in vm_exec_core insns.def:227:5 0x7f0fcfdf0020 is located 26181664 bytes inside of 33554432-byte region [0x7f0fce4f8000,0x7f0fd04f8000) allocated by thread T0 here: #0 0x55bdaacd3047 in posix_memalign (ruby+0x1c2047) #1 0x55bdaad56b75 in rb_aligned_malloc gc.c:9195:9 #2 0x55bdab24c523 in transient_heap_block_alloc transient_heap.c:296:24 #3 0x55bdab24c1fe in Init_TransientHeap transient_heap.c:435:39 #4 0x55bdaada26f8 in rb_call_inits inits.c:20:5 #5 0x55bdaad076af in ruby_setup eval.c:74:2 #6 0x55bdaad0796c in ruby_init eval.c:91:17 #7 0x55bdaad01598 in main main.c:41:2 #8 0x7f0fd344cb96 in __libc_start_main /build/glibc-OTsEL5/glibc-2.27/csu/../csu/libc-start.c:310 SUMMARY: AddressSanitizer: use-after-poison gc.c:5063:39 in gc_mark_children Shadow bytes around the buggy address: 0x0fe279fb5fb0: f7 f7 f7 f7 f7 f7 f7 f7 f7 f7 f7 f7 f7 f7 f7 f7 0x0fe279fb5fc0: f7 f7 f7 f7 f7 f7 f7 f7 f7 f7 f7 f7 f7 f7 f7 f7 0x0fe279fb5fd0: f7 f7 f7 f7 f7 f7 f7 f7 f7 f7 f7 f7 f7 f7 f7 f7 0x0fe279fb5fe0: f7 f7 f7 f7 f7 f7 f7 f7 f7 f7 f7 f7 f7 f7 f7 f7 0x0fe279fb5ff0: f7 f7 f7 f7 f7 f7 f7 f7 f7 f7 f7 f7 f7 f7 f7 f7 =>0x0fe279fb6000: 00 00 f7 f7[f7]f7 f7 f7 f7 f7 f7 f7 f7 f7 f7 f7 0x0fe279fb6010: f7 f7 f7 f7 f7 f7 f7 f7 f7 f7 f7 f7 f7 f7 f7 f7 0x0fe279fb6020: f7 f7 f7 f7 f7 f7 f7 f7 f7 f7 f7 f7 f7 f7 f7 f7 0x0fe279fb6030: f7 f7 f7 f7 f7 f7 f7 f7 f7 f7 f7 f7 f7 f7 f7 f7 0x0fe279fb6040: f7 f7 f7 f7 f7 f7 f7 f7 f7 f7 f7 f7 f7 f7 f7 f7 0x0fe279fb6050: f7 f7 f7 f7 f7 f7 f7 f7 f7 f7 f7 f7 f7 f7 f7 f7 Shadow byte legend (one shadow byte represents 8 application bytes): Addressable: 00 Partially addressable: 01 02 03 04 05 06 07 Heap left redzone: fa Freed heap region: fd Stack left redzone: f1 Stack mid redzone: f2 Stack right redzone: f3 Stack after return: f5 Stack use after scope: f8 Global redzone: f9 Global init order: f6 Poisoned by user: f7 Container overflow: fc Array cookie: ac Intra object redzone: bb ASan internal: fe Left alloca redzone: ca Right alloca redzone: cb Shadow gap: cc ==60984==ABORTING

ec->cfp->iseq might not exist at the very beginning of a thread. ================================================================= ==82954==ERROR: AddressSanitizer: heap-buffer-overflow on address 0x7fc86f334810 at pc 0x55ceaf013125 bp 0x7ffe2eddbbf0 sp 0x7ffe2eddbbe8 READ of size 8 at 0x7fc86f334810 thread T0 #0 0x55ceaf013124 in vm_check_canary vm_insnhelper.c:217:24 #1 0x55ceaefb4796 in vm_push_frame vm_insnhelper.c:276:5 #2 0x55ceaf0124bd in th_init vm.c:2661:5 #3 0x55ceaf00d5eb in ruby_thread_init vm.c:2690:5 #4 0x55ceaf00d4b1 in rb_thread_alloc vm.c:2703:5 #5 0x55ceaef0038b in thread_s_new thread.c:872:20 #6 0x55ceaf04d8c1 in call_cfunc_m1 vm_insnhelper.c:2041:12 #7 0x55ceaf03118d in vm_call_cfunc_with_frame vm_insnhelper.c:2207:11 #8 0x55ceaf017985 in vm_call_cfunc vm_insnhelper.c:2225:12 #9 0x55ceaf01548b in vm_call_method_each_type vm_insnhelper.c:2560:9 #10 0x55ceaf014c96 in vm_call_method vm_insnhelper.c:2686:13 #11 0x55ceaefb5de4 in vm_call_general vm_insnhelper.c:2730:12 #12 0x55ceaf03c868 in vm_sendish vm_insnhelper.c:3623:11 #13 0x55ceaefc95bb in vm_exec_core insns.def:771:11 ruby#14 0x55ceaf006700 in rb_vm_exec vm.c:1892:22 ruby#15 0x55ceaf00acbf in rb_iseq_eval_main vm.c:2151:11 ruby#16 0x55ceaea250ca in ruby_exec_internal eval.c:262:2 ruby#17 0x55ceaea2498b in ruby_exec_node eval.c:326:12 ruby#18 0x55ceaea247d0 in ruby_run_node eval.c:318:25 ruby#19 0x55ceae88c486 in main main.c:42:9 #20 0x7fc874330b96 in __libc_start_main /build/glibc-OTsEL5/glibc-2.27/csu/../csu/libc-start.c:310 ruby#21 0x55ceae7e5289 in _start (miniruby+0x15f289) 0x7fc86f334810 is located 16 bytes to the right of 1048576-byte region [0x7fc86f234800,0x7fc86f334800) allocated by thread T0 here: #0 0x55ceae85d56d in malloc (miniruby+0x1d756d) #1 0x55ceaea71d12 in objspace_xmalloc0 gc.c:9416:5 #2 0x55ceaea71cd2 in ruby_xmalloc2_body gc.c:9623:12 #3 0x55ceaea7d09c in ruby_xmalloc2 gc.c:11479:12 #4 0x55ceaf00c3b7 in rb_thread_recycle_stack vm.c:2462:12 #5 0x55ceaf012256 in th_init vm.c:2656:29 #6 0x55ceaf00d5eb in ruby_thread_init vm.c:2690:5 #7 0x55ceaf00d4b1 in rb_thread_alloc vm.c:2703:5 #8 0x55ceaef0038b in thread_s_new thread.c:872:20 #9 0x55ceaf04d8c1 in call_cfunc_m1 vm_insnhelper.c:2041:12 #10 0x55ceaf03118d in vm_call_cfunc_with_frame vm_insnhelper.c:2207:11 #11 0x55ceaf017985 in vm_call_cfunc vm_insnhelper.c:2225:12 #12 0x55ceaf01548b in vm_call_method_each_type vm_insnhelper.c:2560:9 #13 0x55ceaf014c96 in vm_call_method vm_insnhelper.c:2686:13 ruby#14 0x55ceaefb5de4 in vm_call_general vm_insnhelper.c:2730:12 ruby#15 0x55ceaf03c868 in vm_sendish vm_insnhelper.c:3623:11 ruby#16 0x55ceaefc95bb in vm_exec_core insns.def:771:11 ruby#17 0x55ceaf006700 in rb_vm_exec vm.c:1892:22 ruby#18 0x55ceaf00acbf in rb_iseq_eval_main vm.c:2151:11 ruby#19 0x55ceaea250ca in ruby_exec_internal eval.c:262:2 #20 0x55ceaea2498b in ruby_exec_node eval.c:326:12 ruby#21 0x55ceaea247d0 in ruby_run_node eval.c:318:25 ruby#22 0x55ceae88c486 in main main.c:42:9 ruby#23 0x7fc874330b96 in __libc_start_main /build/glibc-OTsEL5/glibc-2.27/csu/../csu/libc-start.c:310 SUMMARY: AddressSanitizer: heap-buffer-overflow vm_insnhelper.c:217:24 in vm_check_canary Shadow bytes around the buggy address: 0x0ff98de5e8b0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 0x0ff98de5e8c0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 0x0ff98de5e8d0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 0x0ff98de5e8e0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 0x0ff98de5e8f0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 =>0x0ff98de5e900: fa fa[fa]fa fa fa fa fa fa fa fa fa fa fa fa fa 0x0ff98de5e910: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa 0x0ff98de5e920: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa 0x0ff98de5e930: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa 0x0ff98de5e940: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa 0x0ff98de5e950: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa Shadow byte legend (one shadow byte represents 8 application bytes): Addressable: 00 Partially addressable: 01 02 03 04 05 06 07 Heap left redzone: fa Freed heap region: fd Stack left redzone: f1 Stack mid redzone: f2 Stack right redzone: f3 Stack after return: f5 Stack use after scope: f8 Global redzone: f9 Global init order: f6 Poisoned by user: f7 Container overflow: fc Array cookie: ac Intra object redzone: bb ASan internal: fe Left alloca redzone: ca Right alloca redzone: cb Shadow gap: cc ==82954==ABORTING

rb_io_fptr_finalize_internal frees the memory region. ================================================================= ==85264==ERROR: AddressSanitizer: heap-use-after-free on address 0x610000000d8c at pc 0x5608e38077f7 bp 0x7ffee12d5440 sp 0x7ffee12d5438 READ of size 4 at 0x610000000d8c thread T0 #0 0x5608e38077f6 in rb_io_memsize io.c:4749:24 #1 0x5608e37a0481 in obj_memsize_of gc.c:3547:14 #2 0x5608e37a4f30 in check_rvalue_consistency gc.c:1107:2 #3 0x5608e37a2624 in RVALUE_OLD_P gc.c:1218:5 #4 0x5608e37a5bae in rb_gc_force_recycle gc.c:6652:18 #5 0x5608e38191f9 in rb_f_backquote io.c:9021:5 #6 0x5608e3d8aa14 in call_cfunc_1 vm_insnhelper.c:2058:12 #7 0x5608e3d6e23d in vm_call_cfunc_with_frame vm_insnhelper.c:2211:11 #8 0x5608e3d54a35 in vm_call_cfunc vm_insnhelper.c:2229:12 #9 0x5608e3d5253b in vm_call_method_each_type vm_insnhelper.c:2564:9 #10 0x5608e3d51f50 in vm_call_method vm_insnhelper.c:2701:13 #11 0x5608e3cf2de4 in vm_call_general vm_insnhelper.c:2734:12 #12 0x5608e3d79918 in vm_sendish vm_insnhelper.c:3627:11 #13 0x5608e3d06cf5 in vm_exec_core insns.def:789:11 ruby#14 0x5608e3d43700 in rb_vm_exec vm.c:1892:22 ruby#15 0x5608e3d47cbf in rb_iseq_eval_main vm.c:2151:11 ruby#16 0x5608e37620ca in ruby_exec_internal eval.c:262:2 ruby#17 0x5608e376198b in ruby_exec_node eval.c:326:12 ruby#18 0x5608e37617d0 in ruby_run_node eval.c:318:25 ruby#19 0x5608e35c9486 in main main.c:42:9 #20 0x7f62e9421b96 in __libc_start_main /build/glibc-OTsEL5/glibc-2.27/csu/../csu/libc-start.c:310 ruby#21 0x5608e3522289 in _start (miniruby+0x15f289) 0x610000000d8c is located 76 bytes inside of 192-byte region [0x610000000d40,0x610000000e00) freed by thread T0 here: #0 0x5608e359a2ed in free (miniruby+0x1d72ed) #1 0x5608e37af421 in objspace_xfree gc.c:9591:5 #2 0x5608e37af3da in ruby_sized_xfree gc.c:9687:2 #3 0x5608e3799ac8 in ruby_xfree gc.c:9694:5 #4 0x5608e380746d in rb_io_fptr_finalize_internal io.c:4728:5 #5 0x5608e38191ed in rb_f_backquote io.c:9020:5 #6 0x5608e3d8aa14 in call_cfunc_1 vm_insnhelper.c:2058:12 #7 0x5608e3d6e23d in vm_call_cfunc_with_frame vm_insnhelper.c:2211:11 #8 0x5608e3d54a35 in vm_call_cfunc vm_insnhelper.c:2229:12 #9 0x5608e3d5253b in vm_call_method_each_type vm_insnhelper.c:2564:9 #10 0x5608e3d51f50 in vm_call_method vm_insnhelper.c:2701:13 #11 0x5608e3cf2de4 in vm_call_general vm_insnhelper.c:2734:12 #12 0x5608e3d79918 in vm_sendish vm_insnhelper.c:3627:11 #13 0x5608e3d06cf5 in vm_exec_core insns.def:789:11 ruby#14 0x5608e3d43700 in rb_vm_exec vm.c:1892:22 ruby#15 0x5608e3d47cbf in rb_iseq_eval_main vm.c:2151:11 ruby#16 0x5608e37620ca in ruby_exec_internal eval.c:262:2 ruby#17 0x5608e376198b in ruby_exec_node eval.c:326:12 ruby#18 0x5608e37617d0 in ruby_run_node eval.c:318:25 ruby#19 0x5608e35c9486 in main main.c:42:9 #20 0x7f62e9421b96 in __libc_start_main /build/glibc-OTsEL5/glibc-2.27/csu/../csu/libc-start.c:310 previously allocated by thread T0 here: #0 0x5608e359a56d in malloc (miniruby+0x1d756d) #1 0x5608e37aed12 in objspace_xmalloc0 gc.c:9416:5 #2 0x5608e37aebe7 in ruby_xmalloc0 gc.c:9600:12 #3 0x5608e37aea8b in ruby_xmalloc_body gc.c:9609:12 #4 0x5608e37a6d64 in ruby_xmalloc gc.c:11469:12 #5 0x5608e380e4b4 in rb_io_fptr_new io.c:8040:19 #6 0x5608e380e446 in rb_io_make_open_file io.c:8077:10 #7 0x5608e3850ea0 in pipe_open io.c:6707:5 #8 0x5608e384edb4 in pipe_open_s io.c:6772:12 #9 0x5608e381910b in rb_f_backquote io.c:9014:12 #10 0x5608e3d8aa14 in call_cfunc_1 vm_insnhelper.c:2058:12 #11 0x5608e3d6e23d in vm_call_cfunc_with_frame vm_insnhelper.c:2211:11 #12 0x5608e3d54a35 in vm_call_cfunc vm_insnhelper.c:2229:12 #13 0x5608e3d5253b in vm_call_method_each_type vm_insnhelper.c:2564:9 ruby#14 0x5608e3d51f50 in vm_call_method vm_insnhelper.c:2701:13 ruby#15 0x5608e3cf2de4 in vm_call_general vm_insnhelper.c:2734:12 ruby#16 0x5608e3d79918 in vm_sendish vm_insnhelper.c:3627:11 ruby#17 0x5608e3d06cf5 in vm_exec_core insns.def:789:11 ruby#18 0x5608e3d43700 in rb_vm_exec vm.c:1892:22 ruby#19 0x5608e3d47cbf in rb_iseq_eval_main vm.c:2151:11 #20 0x5608e37620ca in ruby_exec_internal eval.c:262:2 ruby#21 0x5608e376198b in ruby_exec_node eval.c:326:12 ruby#22 0x5608e37617d0 in ruby_run_node eval.c:318:25 ruby#23 0x5608e35c9486 in main main.c:42:9 ruby#24 0x7f62e9421b96 in __libc_start_main /build/glibc-OTsEL5/glibc-2.27/csu/../csu/libc-start.c:310 SUMMARY: AddressSanitizer: heap-use-after-free io.c:4749:24 in rb_io_memsize Shadow bytes around the buggy address: 0x0c207fff8160: fa fa fa fa fa fa fa fa 00 00 00 00 00 00 00 00 0x0c207fff8170: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 0x0c207fff8180: fa fa fa fa fa fa fa fa 00 00 00 00 00 00 00 00 0x0c207fff8190: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 0x0c207fff81a0: fa fa fa fa fa fa fa fa fd fd fd fd fd fd fd fd =>0x0c207fff81b0: fd[fd]fd fd fd fd fd fd fd fd fd fd fd fd fd fd 0x0c207fff81c0: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa 0x0c207fff81d0: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa 0x0c207fff81e0: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa 0x0c207fff81f0: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa 0x0c207fff8200: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa Shadow byte legend (one shadow byte represents 8 application bytes): Addressable: 00 Partially addressable: 01 02 03 04 05 06 07 Heap left redzone: fa Freed heap region: fd Stack left redzone: f1 Stack mid redzone: f2 Stack right redzone: f3 Stack after return: f5 Stack use after scope: f8 Global redzone: f9 Global init order: f6 Poisoned by user: f7 Container overflow: fc Array cookie: ac Intra object redzone: bb ASan internal: fe Left alloca redzone: ca Right alloca redzone: cb Shadow gap: cc ==85264==ABORTING

GC.stress unveils that an ivptr allocated using transient heap gets marked right before it evacuates to normal heaps (the evacuation itself triggers GC). Should fill something beforehand. ================================================================= ==60984==ERROR: AddressSanitizer: use-after-poison on address 0x7f0fcfdf0020 at pc 0x55bdaad55381 bp 0x7fffcddc0910 sp 0x7fffcddc0908 READ of size 8 at 0x7f0fcfdf0020 thread T0 #0 0x55bdaad55380 in gc_mark_children gc.c:5063:39 #1 0x55bdaad6b7c2 in gc_mark_stacked_objects gc.c:5156:9 #2 0x55bdaad6cb1a in gc_mark_stacked_objects_all gc.c:5196:12 #3 0x55bdaad6a180 in gc_marks_rest gc.c:6109:2 #4 0x55bdaad6ef51 in gc_marks gc.c:6169:6 #5 0x55bdaad63bfd in gc_start gc.c:6974:2 #6 0x55bdaad4fa73 in garbage_collect gc.c:6869:12 #7 0x55bdaad7866e in garbage_collect_with_gvl gc.c:7127:9 #8 0x55bdaad784d6 in objspace_malloc_gc_stress gc.c:9270:9 #9 0x55bdaad56f29 in objspace_xmalloc0 gc.c:9416:5 #10 0x55bdaad56ef2 in ruby_xmalloc2_body gc.c:9623:12 #11 0x55bdaad615dc in ruby_xmalloc2 gc.c:11479:12 #12 0x55bdab26a601 in obj_ivar_heap_alloc variable.c:1405:18 #13 0x55bdab27a35b in obj_ivar_heap_realloc variable.c:1418:23 ruby#14 0x55bdab26ac98 in obj_ivar_set variable.c:1490:26 ruby#15 0x55bdab2621fd in rb_ivar_set variable.c:1513:16 ruby#16 0x55bdab2e841d in vm_setivar vm_insnhelper.c:1118:12 ruby#17 0x55bdab2ecca4 in vm_setinstancevariable vm_insnhelper.c:1130:5 ruby#18 0x55bdab28113c in vm_exec_core insns.def:227:5 0x7f0fcfdf0020 is located 26181664 bytes inside of 33554432-byte region [0x7f0fce4f8000,0x7f0fd04f8000) allocated by thread T0 here: #0 0x55bdaacd3047 in posix_memalign (ruby+0x1c2047) #1 0x55bdaad56b75 in rb_aligned_malloc gc.c:9195:9 #2 0x55bdab24c523 in transient_heap_block_alloc transient_heap.c:296:24 #3 0x55bdab24c1fe in Init_TransientHeap transient_heap.c:435:39 #4 0x55bdaada26f8 in rb_call_inits inits.c:20:5 #5 0x55bdaad076af in ruby_setup eval.c:74:2 #6 0x55bdaad0796c in ruby_init eval.c:91:17 #7 0x55bdaad01598 in main main.c:41:2 #8 0x7f0fd344cb96 in __libc_start_main /build/glibc-OTsEL5/glibc-2.27/csu/../csu/libc-start.c:310 SUMMARY: AddressSanitizer: use-after-poison gc.c:5063:39 in gc_mark_children Shadow bytes around the buggy address: 0x0fe279fb5fb0: f7 f7 f7 f7 f7 f7 f7 f7 f7 f7 f7 f7 f7 f7 f7 f7 0x0fe279fb5fc0: f7 f7 f7 f7 f7 f7 f7 f7 f7 f7 f7 f7 f7 f7 f7 f7 0x0fe279fb5fd0: f7 f7 f7 f7 f7 f7 f7 f7 f7 f7 f7 f7 f7 f7 f7 f7 0x0fe279fb5fe0: f7 f7 f7 f7 f7 f7 f7 f7 f7 f7 f7 f7 f7 f7 f7 f7 0x0fe279fb5ff0: f7 f7 f7 f7 f7 f7 f7 f7 f7 f7 f7 f7 f7 f7 f7 f7 =>0x0fe279fb6000: 00 00 f7 f7[f7]f7 f7 f7 f7 f7 f7 f7 f7 f7 f7 f7 0x0fe279fb6010: f7 f7 f7 f7 f7 f7 f7 f7 f7 f7 f7 f7 f7 f7 f7 f7 0x0fe279fb6020: f7 f7 f7 f7 f7 f7 f7 f7 f7 f7 f7 f7 f7 f7 f7 f7 0x0fe279fb6030: f7 f7 f7 f7 f7 f7 f7 f7 f7 f7 f7 f7 f7 f7 f7 f7 0x0fe279fb6040: f7 f7 f7 f7 f7 f7 f7 f7 f7 f7 f7 f7 f7 f7 f7 f7 0x0fe279fb6050: f7 f7 f7 f7 f7 f7 f7 f7 f7 f7 f7 f7 f7 f7 f7 f7 Shadow byte legend (one shadow byte represents 8 application bytes): Addressable: 00 Partially addressable: 01 02 03 04 05 06 07 Heap left redzone: fa Freed heap region: fd Stack left redzone: f1 Stack mid redzone: f2 Stack right redzone: f3 Stack after return: f5 Stack use after scope: f8 Global redzone: f9 Global init order: f6 Poisoned by user: f7 Container overflow: fc Array cookie: ac Intra object redzone: bb ASan internal: fe Left alloca redzone: ca Right alloca redzone: cb Shadow gap: cc ==60984==ABORTING

ec->cfp->iseq might not exist at the very beginning of a thread. ================================================================= ==82954==ERROR: AddressSanitizer: heap-buffer-overflow on address 0x7fc86f334810 at pc 0x55ceaf013125 bp 0x7ffe2eddbbf0 sp 0x7ffe2eddbbe8 READ of size 8 at 0x7fc86f334810 thread T0 #0 0x55ceaf013124 in vm_check_canary vm_insnhelper.c:217:24 #1 0x55ceaefb4796 in vm_push_frame vm_insnhelper.c:276:5 #2 0x55ceaf0124bd in th_init vm.c:2661:5 #3 0x55ceaf00d5eb in ruby_thread_init vm.c:2690:5 #4 0x55ceaf00d4b1 in rb_thread_alloc vm.c:2703:5 #5 0x55ceaef0038b in thread_s_new thread.c:872:20 #6 0x55ceaf04d8c1 in call_cfunc_m1 vm_insnhelper.c:2041:12 #7 0x55ceaf03118d in vm_call_cfunc_with_frame vm_insnhelper.c:2207:11 #8 0x55ceaf017985 in vm_call_cfunc vm_insnhelper.c:2225:12 #9 0x55ceaf01548b in vm_call_method_each_type vm_insnhelper.c:2560:9 #10 0x55ceaf014c96 in vm_call_method vm_insnhelper.c:2686:13 #11 0x55ceaefb5de4 in vm_call_general vm_insnhelper.c:2730:12 #12 0x55ceaf03c868 in vm_sendish vm_insnhelper.c:3623:11 #13 0x55ceaefc95bb in vm_exec_core insns.def:771:11 ruby#14 0x55ceaf006700 in rb_vm_exec vm.c:1892:22 ruby#15 0x55ceaf00acbf in rb_iseq_eval_main vm.c:2151:11 ruby#16 0x55ceaea250ca in ruby_exec_internal eval.c:262:2 ruby#17 0x55ceaea2498b in ruby_exec_node eval.c:326:12 ruby#18 0x55ceaea247d0 in ruby_run_node eval.c:318:25 ruby#19 0x55ceae88c486 in main main.c:42:9 #20 0x7fc874330b96 in __libc_start_main /build/glibc-OTsEL5/glibc-2.27/csu/../csu/libc-start.c:310 ruby#21 0x55ceae7e5289 in _start (miniruby+0x15f289) 0x7fc86f334810 is located 16 bytes to the right of 1048576-byte region [0x7fc86f234800,0x7fc86f334800) allocated by thread T0 here: #0 0x55ceae85d56d in malloc (miniruby+0x1d756d) #1 0x55ceaea71d12 in objspace_xmalloc0 gc.c:9416:5 #2 0x55ceaea71cd2 in ruby_xmalloc2_body gc.c:9623:12 #3 0x55ceaea7d09c in ruby_xmalloc2 gc.c:11479:12 #4 0x55ceaf00c3b7 in rb_thread_recycle_stack vm.c:2462:12 #5 0x55ceaf012256 in th_init vm.c:2656:29 #6 0x55ceaf00d5eb in ruby_thread_init vm.c:2690:5 #7 0x55ceaf00d4b1 in rb_thread_alloc vm.c:2703:5 #8 0x55ceaef0038b in thread_s_new thread.c:872:20 #9 0x55ceaf04d8c1 in call_cfunc_m1 vm_insnhelper.c:2041:12 #10 0x55ceaf03118d in vm_call_cfunc_with_frame vm_insnhelper.c:2207:11 #11 0x55ceaf017985 in vm_call_cfunc vm_insnhelper.c:2225:12 #12 0x55ceaf01548b in vm_call_method_each_type vm_insnhelper.c:2560:9 #13 0x55ceaf014c96 in vm_call_method vm_insnhelper.c:2686:13 ruby#14 0x55ceaefb5de4 in vm_call_general vm_insnhelper.c:2730:12 ruby#15 0x55ceaf03c868 in vm_sendish vm_insnhelper.c:3623:11 ruby#16 0x55ceaefc95bb in vm_exec_core insns.def:771:11 ruby#17 0x55ceaf006700 in rb_vm_exec vm.c:1892:22 ruby#18 0x55ceaf00acbf in rb_iseq_eval_main vm.c:2151:11 ruby#19 0x55ceaea250ca in ruby_exec_internal eval.c:262:2 #20 0x55ceaea2498b in ruby_exec_node eval.c:326:12 ruby#21 0x55ceaea247d0 in ruby_run_node eval.c:318:25 ruby#22 0x55ceae88c486 in main main.c:42:9 ruby#23 0x7fc874330b96 in __libc_start_main /build/glibc-OTsEL5/glibc-2.27/csu/../csu/libc-start.c:310 SUMMARY: AddressSanitizer: heap-buffer-overflow vm_insnhelper.c:217:24 in vm_check_canary Shadow bytes around the buggy address: 0x0ff98de5e8b0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 0x0ff98de5e8c0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 0x0ff98de5e8d0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 0x0ff98de5e8e0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 0x0ff98de5e8f0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 =>0x0ff98de5e900: fa fa[fa]fa fa fa fa fa fa fa fa fa fa fa fa fa 0x0ff98de5e910: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa 0x0ff98de5e920: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa 0x0ff98de5e930: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa 0x0ff98de5e940: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa 0x0ff98de5e950: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa Shadow byte legend (one shadow byte represents 8 application bytes): Addressable: 00 Partially addressable: 01 02 03 04 05 06 07 Heap left redzone: fa Freed heap region: fd Stack left redzone: f1 Stack mid redzone: f2 Stack right redzone: f3 Stack after return: f5 Stack use after scope: f8 Global redzone: f9 Global init order: f6 Poisoned by user: f7 Container overflow: fc Array cookie: ac Intra object redzone: bb ASan internal: fe Left alloca redzone: ca Right alloca redzone: cb Shadow gap: cc ==82954==ABORTING

rb_io_fptr_finalize_internal frees the memory region. ================================================================= ==85264==ERROR: AddressSanitizer: heap-use-after-free on address 0x610000000d8c at pc 0x5608e38077f7 bp 0x7ffee12d5440 sp 0x7ffee12d5438 READ of size 4 at 0x610000000d8c thread T0 #0 0x5608e38077f6 in rb_io_memsize io.c:4749:24 #1 0x5608e37a0481 in obj_memsize_of gc.c:3547:14 #2 0x5608e37a4f30 in check_rvalue_consistency gc.c:1107:2 #3 0x5608e37a2624 in RVALUE_OLD_P gc.c:1218:5 #4 0x5608e37a5bae in rb_gc_force_recycle gc.c:6652:18 #5 0x5608e38191f9 in rb_f_backquote io.c:9021:5 #6 0x5608e3d8aa14 in call_cfunc_1 vm_insnhelper.c:2058:12 #7 0x5608e3d6e23d in vm_call_cfunc_with_frame vm_insnhelper.c:2211:11 #8 0x5608e3d54a35 in vm_call_cfunc vm_insnhelper.c:2229:12 #9 0x5608e3d5253b in vm_call_method_each_type vm_insnhelper.c:2564:9 #10 0x5608e3d51f50 in vm_call_method vm_insnhelper.c:2701:13 #11 0x5608e3cf2de4 in vm_call_general vm_insnhelper.c:2734:12 #12 0x5608e3d79918 in vm_sendish vm_insnhelper.c:3627:11 #13 0x5608e3d06cf5 in vm_exec_core insns.def:789:11 ruby#14 0x5608e3d43700 in rb_vm_exec vm.c:1892:22 ruby#15 0x5608e3d47cbf in rb_iseq_eval_main vm.c:2151:11 ruby#16 0x5608e37620ca in ruby_exec_internal eval.c:262:2 ruby#17 0x5608e376198b in ruby_exec_node eval.c:326:12 ruby#18 0x5608e37617d0 in ruby_run_node eval.c:318:25 ruby#19 0x5608e35c9486 in main main.c:42:9 #20 0x7f62e9421b96 in __libc_start_main /build/glibc-OTsEL5/glibc-2.27/csu/../csu/libc-start.c:310 ruby#21 0x5608e3522289 in _start (miniruby+0x15f289) 0x610000000d8c is located 76 bytes inside of 192-byte region [0x610000000d40,0x610000000e00) freed by thread T0 here: #0 0x5608e359a2ed in free (miniruby+0x1d72ed) #1 0x5608e37af421 in objspace_xfree gc.c:9591:5 #2 0x5608e37af3da in ruby_sized_xfree gc.c:9687:2 #3 0x5608e3799ac8 in ruby_xfree gc.c:9694:5 #4 0x5608e380746d in rb_io_fptr_finalize_internal io.c:4728:5 #5 0x5608e38191ed in rb_f_backquote io.c:9020:5 #6 0x5608e3d8aa14 in call_cfunc_1 vm_insnhelper.c:2058:12 #7 0x5608e3d6e23d in vm_call_cfunc_with_frame vm_insnhelper.c:2211:11 #8 0x5608e3d54a35 in vm_call_cfunc vm_insnhelper.c:2229:12 #9 0x5608e3d5253b in vm_call_method_each_type vm_insnhelper.c:2564:9 #10 0x5608e3d51f50 in vm_call_method vm_insnhelper.c:2701:13 #11 0x5608e3cf2de4 in vm_call_general vm_insnhelper.c:2734:12 #12 0x5608e3d79918 in vm_sendish vm_insnhelper.c:3627:11 #13 0x5608e3d06cf5 in vm_exec_core insns.def:789:11 ruby#14 0x5608e3d43700 in rb_vm_exec vm.c:1892:22 ruby#15 0x5608e3d47cbf in rb_iseq_eval_main vm.c:2151:11 ruby#16 0x5608e37620ca in ruby_exec_internal eval.c:262:2 ruby#17 0x5608e376198b in ruby_exec_node eval.c:326:12 ruby#18 0x5608e37617d0 in ruby_run_node eval.c:318:25 ruby#19 0x5608e35c9486 in main main.c:42:9 #20 0x7f62e9421b96 in __libc_start_main /build/glibc-OTsEL5/glibc-2.27/csu/../csu/libc-start.c:310 previously allocated by thread T0 here: #0 0x5608e359a56d in malloc (miniruby+0x1d756d) #1 0x5608e37aed12 in objspace_xmalloc0 gc.c:9416:5 #2 0x5608e37aebe7 in ruby_xmalloc0 gc.c:9600:12 #3 0x5608e37aea8b in ruby_xmalloc_body gc.c:9609:12 #4 0x5608e37a6d64 in ruby_xmalloc gc.c:11469:12 #5 0x5608e380e4b4 in rb_io_fptr_new io.c:8040:19 #6 0x5608e380e446 in rb_io_make_open_file io.c:8077:10 #7 0x5608e3850ea0 in pipe_open io.c:6707:5 #8 0x5608e384edb4 in pipe_open_s io.c:6772:12 #9 0x5608e381910b in rb_f_backquote io.c:9014:12 #10 0x5608e3d8aa14 in call_cfunc_1 vm_insnhelper.c:2058:12 #11 0x5608e3d6e23d in vm_call_cfunc_with_frame vm_insnhelper.c:2211:11 #12 0x5608e3d54a35 in vm_call_cfunc vm_insnhelper.c:2229:12 #13 0x5608e3d5253b in vm_call_method_each_type vm_insnhelper.c:2564:9 ruby#14 0x5608e3d51f50 in vm_call_method vm_insnhelper.c:2701:13 ruby#15 0x5608e3cf2de4 in vm_call_general vm_insnhelper.c:2734:12 ruby#16 0x5608e3d79918 in vm_sendish vm_insnhelper.c:3627:11 ruby#17 0x5608e3d06cf5 in vm_exec_core insns.def:789:11 ruby#18 0x5608e3d43700 in rb_vm_exec vm.c:1892:22 ruby#19 0x5608e3d47cbf in rb_iseq_eval_main vm.c:2151:11 #20 0x5608e37620ca in ruby_exec_internal eval.c:262:2 ruby#21 0x5608e376198b in ruby_exec_node eval.c:326:12 ruby#22 0x5608e37617d0 in ruby_run_node eval.c:318:25 ruby#23 0x5608e35c9486 in main main.c:42:9 ruby#24 0x7f62e9421b96 in __libc_start_main /build/glibc-OTsEL5/glibc-2.27/csu/../csu/libc-start.c:310 SUMMARY: AddressSanitizer: heap-use-after-free io.c:4749:24 in rb_io_memsize Shadow bytes around the buggy address: 0x0c207fff8160: fa fa fa fa fa fa fa fa 00 00 00 00 00 00 00 00 0x0c207fff8170: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 0x0c207fff8180: fa fa fa fa fa fa fa fa 00 00 00 00 00 00 00 00 0x0c207fff8190: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 0x0c207fff81a0: fa fa fa fa fa fa fa fa fd fd fd fd fd fd fd fd =>0x0c207fff81b0: fd[fd]fd fd fd fd fd fd fd fd fd fd fd fd fd fd 0x0c207fff81c0: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa 0x0c207fff81d0: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa 0x0c207fff81e0: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa 0x0c207fff81f0: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa 0x0c207fff8200: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa Shadow byte legend (one shadow byte represents 8 application bytes): Addressable: 00 Partially addressable: 01 02 03 04 05 06 07 Heap left redzone: fa Freed heap region: fd Stack left redzone: f1 Stack mid redzone: f2 Stack right redzone: f3 Stack after return: f5 Stack use after scope: f8 Global redzone: f9 Global init order: f6 Poisoned by user: f7 Container overflow: fc Array cookie: ac Intra object redzone: bb ASan internal: fe Left alloca redzone: ca Right alloca redzone: cb Shadow gap: cc ==85264==ABORTING

ec->cfp->iseq might not exist at the very beginning of a thread. ================================================================= ==82954==ERROR: AddressSanitizer: heap-buffer-overflow on address 0x7fc86f334810 at pc 0x55ceaf013125 bp 0x7ffe2eddbbf0 sp 0x7ffe2eddbbe8 READ of size 8 at 0x7fc86f334810 thread T0 #0 0x55ceaf013124 in vm_check_canary vm_insnhelper.c:217:24 #1 0x55ceaefb4796 in vm_push_frame vm_insnhelper.c:276:5 #2 0x55ceaf0124bd in th_init vm.c:2661:5 #3 0x55ceaf00d5eb in ruby_thread_init vm.c:2690:5 #4 0x55ceaf00d4b1 in rb_thread_alloc vm.c:2703:5 #5 0x55ceaef0038b in thread_s_new thread.c:872:20 #6 0x55ceaf04d8c1 in call_cfunc_m1 vm_insnhelper.c:2041:12 #7 0x55ceaf03118d in vm_call_cfunc_with_frame vm_insnhelper.c:2207:11 #8 0x55ceaf017985 in vm_call_cfunc vm_insnhelper.c:2225:12 #9 0x55ceaf01548b in vm_call_method_each_type vm_insnhelper.c:2560:9 #10 0x55ceaf014c96 in vm_call_method vm_insnhelper.c:2686:13 #11 0x55ceaefb5de4 in vm_call_general vm_insnhelper.c:2730:12 #12 0x55ceaf03c868 in vm_sendish vm_insnhelper.c:3623:11 #13 0x55ceaefc95bb in vm_exec_core insns.def:771:11 ruby#14 0x55ceaf006700 in rb_vm_exec vm.c:1892:22 ruby#15 0x55ceaf00acbf in rb_iseq_eval_main vm.c:2151:11 ruby#16 0x55ceaea250ca in ruby_exec_internal eval.c:262:2 ruby#17 0x55ceaea2498b in ruby_exec_node eval.c:326:12 ruby#18 0x55ceaea247d0 in ruby_run_node eval.c:318:25 ruby#19 0x55ceae88c486 in main main.c:42:9 #20 0x7fc874330b96 in __libc_start_main /build/glibc-OTsEL5/glibc-2.27/csu/../csu/libc-start.c:310 ruby#21 0x55ceae7e5289 in _start (miniruby+0x15f289) 0x7fc86f334810 is located 16 bytes to the right of 1048576-byte region [0x7fc86f234800,0x7fc86f334800) allocated by thread T0 here: #0 0x55ceae85d56d in malloc (miniruby+0x1d756d) #1 0x55ceaea71d12 in objspace_xmalloc0 gc.c:9416:5 #2 0x55ceaea71cd2 in ruby_xmalloc2_body gc.c:9623:12 #3 0x55ceaea7d09c in ruby_xmalloc2 gc.c:11479:12 #4 0x55ceaf00c3b7 in rb_thread_recycle_stack vm.c:2462:12 #5 0x55ceaf012256 in th_init vm.c:2656:29 #6 0x55ceaf00d5eb in ruby_thread_init vm.c:2690:5 #7 0x55ceaf00d4b1 in rb_thread_alloc vm.c:2703:5 #8 0x55ceaef0038b in thread_s_new thread.c:872:20 #9 0x55ceaf04d8c1 in call_cfunc_m1 vm_insnhelper.c:2041:12 #10 0x55ceaf03118d in vm_call_cfunc_with_frame vm_insnhelper.c:2207:11 #11 0x55ceaf017985 in vm_call_cfunc vm_insnhelper.c:2225:12 #12 0x55ceaf01548b in vm_call_method_each_type vm_insnhelper.c:2560:9 #13 0x55ceaf014c96 in vm_call_method vm_insnhelper.c:2686:13 ruby#14 0x55ceaefb5de4 in vm_call_general vm_insnhelper.c:2730:12 ruby#15 0x55ceaf03c868 in vm_sendish vm_insnhelper.c:3623:11 ruby#16 0x55ceaefc95bb in vm_exec_core insns.def:771:11 ruby#17 0x55ceaf006700 in rb_vm_exec vm.c:1892:22 ruby#18 0x55ceaf00acbf in rb_iseq_eval_main vm.c:2151:11 ruby#19 0x55ceaea250ca in ruby_exec_internal eval.c:262:2 #20 0x55ceaea2498b in ruby_exec_node eval.c:326:12 ruby#21 0x55ceaea247d0 in ruby_run_node eval.c:318:25 ruby#22 0x55ceae88c486 in main main.c:42:9 ruby#23 0x7fc874330b96 in __libc_start_main /build/glibc-OTsEL5/glibc-2.27/csu/../csu/libc-start.c:310 SUMMARY: AddressSanitizer: heap-buffer-overflow vm_insnhelper.c:217:24 in vm_check_canary Shadow bytes around the buggy address: 0x0ff98de5e8b0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 0x0ff98de5e8c0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 0x0ff98de5e8d0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 0x0ff98de5e8e0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 0x0ff98de5e8f0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 =>0x0ff98de5e900: fa fa[fa]fa fa fa fa fa fa fa fa fa fa fa fa fa 0x0ff98de5e910: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa 0x0ff98de5e920: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa 0x0ff98de5e930: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa 0x0ff98de5e940: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa 0x0ff98de5e950: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa Shadow byte legend (one shadow byte represents 8 application bytes): Addressable: 00 Partially addressable: 01 02 03 04 05 06 07 Heap left redzone: fa Freed heap region: fd Stack left redzone: f1 Stack mid redzone: f2 Stack right redzone: f3 Stack after return: f5 Stack use after scope: f8 Global redzone: f9 Global init order: f6 Poisoned by user: f7 Container overflow: fc Array cookie: ac Intra object redzone: bb ASan internal: fe Left alloca redzone: ca Right alloca redzone: cb Shadow gap: cc ==82954==ABORTING

rb_io_fptr_finalize_internal frees the memory region. ================================================================= ==85264==ERROR: AddressSanitizer: heap-use-after-free on address 0x610000000d8c at pc 0x5608e38077f7 bp 0x7ffee12d5440 sp 0x7ffee12d5438 READ of size 4 at 0x610000000d8c thread T0 #0 0x5608e38077f6 in rb_io_memsize io.c:4749:24 #1 0x5608e37a0481 in obj_memsize_of gc.c:3547:14 #2 0x5608e37a4f30 in check_rvalue_consistency gc.c:1107:2 #3 0x5608e37a2624 in RVALUE_OLD_P gc.c:1218:5 #4 0x5608e37a5bae in rb_gc_force_recycle gc.c:6652:18 #5 0x5608e38191f9 in rb_f_backquote io.c:9021:5 #6 0x5608e3d8aa14 in call_cfunc_1 vm_insnhelper.c:2058:12 #7 0x5608e3d6e23d in vm_call_cfunc_with_frame vm_insnhelper.c:2211:11 #8 0x5608e3d54a35 in vm_call_cfunc vm_insnhelper.c:2229:12 #9 0x5608e3d5253b in vm_call_method_each_type vm_insnhelper.c:2564:9 #10 0x5608e3d51f50 in vm_call_method vm_insnhelper.c:2701:13 #11 0x5608e3cf2de4 in vm_call_general vm_insnhelper.c:2734:12 #12 0x5608e3d79918 in vm_sendish vm_insnhelper.c:3627:11 #13 0x5608e3d06cf5 in vm_exec_core insns.def:789:11 ruby#14 0x5608e3d43700 in rb_vm_exec vm.c:1892:22 ruby#15 0x5608e3d47cbf in rb_iseq_eval_main vm.c:2151:11 ruby#16 0x5608e37620ca in ruby_exec_internal eval.c:262:2 ruby#17 0x5608e376198b in ruby_exec_node eval.c:326:12 ruby#18 0x5608e37617d0 in ruby_run_node eval.c:318:25 ruby#19 0x5608e35c9486 in main main.c:42:9 #20 0x7f62e9421b96 in __libc_start_main /build/glibc-OTsEL5/glibc-2.27/csu/../csu/libc-start.c:310 ruby#21 0x5608e3522289 in _start (miniruby+0x15f289) 0x610000000d8c is located 76 bytes inside of 192-byte region [0x610000000d40,0x610000000e00) freed by thread T0 here: #0 0x5608e359a2ed in free (miniruby+0x1d72ed) #1 0x5608e37af421 in objspace_xfree gc.c:9591:5 #2 0x5608e37af3da in ruby_sized_xfree gc.c:9687:2 #3 0x5608e3799ac8 in ruby_xfree gc.c:9694:5 #4 0x5608e380746d in rb_io_fptr_finalize_internal io.c:4728:5 #5 0x5608e38191ed in rb_f_backquote io.c:9020:5 #6 0x5608e3d8aa14 in call_cfunc_1 vm_insnhelper.c:2058:12 #7 0x5608e3d6e23d in vm_call_cfunc_with_frame vm_insnhelper.c:2211:11 #8 0x5608e3d54a35 in vm_call_cfunc vm_insnhelper.c:2229:12 #9 0x5608e3d5253b in vm_call_method_each_type vm_insnhelper.c:2564:9 #10 0x5608e3d51f50 in vm_call_method vm_insnhelper.c:2701:13 #11 0x5608e3cf2de4 in vm_call_general vm_insnhelper.c:2734:12 #12 0x5608e3d79918 in vm_sendish vm_insnhelper.c:3627:11 #13 0x5608e3d06cf5 in vm_exec_core insns.def:789:11 ruby#14 0x5608e3d43700 in rb_vm_exec vm.c:1892:22 ruby#15 0x5608e3d47cbf in rb_iseq_eval_main vm.c:2151:11 ruby#16 0x5608e37620ca in ruby_exec_internal eval.c:262:2 ruby#17 0x5608e376198b in ruby_exec_node eval.c:326:12 ruby#18 0x5608e37617d0 in ruby_run_node eval.c:318:25 ruby#19 0x5608e35c9486 in main main.c:42:9 #20 0x7f62e9421b96 in __libc_start_main /build/glibc-OTsEL5/glibc-2.27/csu/../csu/libc-start.c:310 previously allocated by thread T0 here: #0 0x5608e359a56d in malloc (miniruby+0x1d756d) #1 0x5608e37aed12 in objspace_xmalloc0 gc.c:9416:5 #2 0x5608e37aebe7 in ruby_xmalloc0 gc.c:9600:12 #3 0x5608e37aea8b in ruby_xmalloc_body gc.c:9609:12 #4 0x5608e37a6d64 in ruby_xmalloc gc.c:11469:12 #5 0x5608e380e4b4 in rb_io_fptr_new io.c:8040:19 #6 0x5608e380e446 in rb_io_make_open_file io.c:8077:10 #7 0x5608e3850ea0 in pipe_open io.c:6707:5 #8 0x5608e384edb4 in pipe_open_s io.c:6772:12 #9 0x5608e381910b in rb_f_backquote io.c:9014:12 #10 0x5608e3d8aa14 in call_cfunc_1 vm_insnhelper.c:2058:12 #11 0x5608e3d6e23d in vm_call_cfunc_with_frame vm_insnhelper.c:2211:11 #12 0x5608e3d54a35 in vm_call_cfunc vm_insnhelper.c:2229:12 #13 0x5608e3d5253b in vm_call_method_each_type vm_insnhelper.c:2564:9 ruby#14 0x5608e3d51f50 in vm_call_method vm_insnhelper.c:2701:13 ruby#15 0x5608e3cf2de4 in vm_call_general vm_insnhelper.c:2734:12 ruby#16 0x5608e3d79918 in vm_sendish vm_insnhelper.c:3627:11 ruby#17 0x5608e3d06cf5 in vm_exec_core insns.def:789:11 ruby#18 0x5608e3d43700 in rb_vm_exec vm.c:1892:22 ruby#19 0x5608e3d47cbf in rb_iseq_eval_main vm.c:2151:11 #20 0x5608e37620ca in ruby_exec_internal eval.c:262:2 ruby#21 0x5608e376198b in ruby_exec_node eval.c:326:12 ruby#22 0x5608e37617d0 in ruby_run_node eval.c:318:25 ruby#23 0x5608e35c9486 in main main.c:42:9 ruby#24 0x7f62e9421b96 in __libc_start_main /build/glibc-OTsEL5/glibc-2.27/csu/../csu/libc-start.c:310 SUMMARY: AddressSanitizer: heap-use-after-free io.c:4749:24 in rb_io_memsize Shadow bytes around the buggy address: 0x0c207fff8160: fa fa fa fa fa fa fa fa 00 00 00 00 00 00 00 00 0x0c207fff8170: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 0x0c207fff8180: fa fa fa fa fa fa fa fa 00 00 00 00 00 00 00 00 0x0c207fff8190: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 0x0c207fff81a0: fa fa fa fa fa fa fa fa fd fd fd fd fd fd fd fd =>0x0c207fff81b0: fd[fd]fd fd fd fd fd fd fd fd fd fd fd fd fd fd 0x0c207fff81c0: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa 0x0c207fff81d0: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa 0x0c207fff81e0: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa 0x0c207fff81f0: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa 0x0c207fff8200: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa Shadow byte legend (one shadow byte represents 8 application bytes): Addressable: 00 Partially addressable: 01 02 03 04 05 06 07 Heap left redzone: fa Freed heap region: fd Stack left redzone: f1 Stack mid redzone: f2 Stack right redzone: f3 Stack after return: f5 Stack use after scope: f8 Global redzone: f9 Global init order: f6 Poisoned by user: f7 Container overflow: fc Array cookie: ac Intra object redzone: bb ASan internal: fe Left alloca redzone: ca Right alloca redzone: cb Shadow gap: cc ==85264==ABORTING

ec->cfp->iseq might not exist at the very beginning of a thread. ================================================================= ==82954==ERROR: AddressSanitizer: heap-buffer-overflow on address 0x7fc86f334810 at pc 0x55ceaf013125 bp 0x7ffe2eddbbf0 sp 0x7ffe2eddbbe8 READ of size 8 at 0x7fc86f334810 thread T0 #0 0x55ceaf013124 in vm_check_canary vm_insnhelper.c:217:24 #1 0x55ceaefb4796 in vm_push_frame vm_insnhelper.c:276:5 #2 0x55ceaf0124bd in th_init vm.c:2661:5 #3 0x55ceaf00d5eb in ruby_thread_init vm.c:2690:5 #4 0x55ceaf00d4b1 in rb_thread_alloc vm.c:2703:5 #5 0x55ceaef0038b in thread_s_new thread.c:872:20 #6 0x55ceaf04d8c1 in call_cfunc_m1 vm_insnhelper.c:2041:12 #7 0x55ceaf03118d in vm_call_cfunc_with_frame vm_insnhelper.c:2207:11 #8 0x55ceaf017985 in vm_call_cfunc vm_insnhelper.c:2225:12 #9 0x55ceaf01548b in vm_call_method_each_type vm_insnhelper.c:2560:9 #10 0x55ceaf014c96 in vm_call_method vm_insnhelper.c:2686:13 #11 0x55ceaefb5de4 in vm_call_general vm_insnhelper.c:2730:12 #12 0x55ceaf03c868 in vm_sendish vm_insnhelper.c:3623:11 #13 0x55ceaefc95bb in vm_exec_core insns.def:771:11 ruby#14 0x55ceaf006700 in rb_vm_exec vm.c:1892:22 ruby#15 0x55ceaf00acbf in rb_iseq_eval_main vm.c:2151:11 ruby#16 0x55ceaea250ca in ruby_exec_internal eval.c:262:2 ruby#17 0x55ceaea2498b in ruby_exec_node eval.c:326:12 ruby#18 0x55ceaea247d0 in ruby_run_node eval.c:318:25 ruby#19 0x55ceae88c486 in main main.c:42:9 #20 0x7fc874330b96 in __libc_start_main /build/glibc-OTsEL5/glibc-2.27/csu/../csu/libc-start.c:310 ruby#21 0x55ceae7e5289 in _start (miniruby+0x15f289) 0x7fc86f334810 is located 16 bytes to the right of 1048576-byte region [0x7fc86f234800,0x7fc86f334800) allocated by thread T0 here: #0 0x55ceae85d56d in malloc (miniruby+0x1d756d) #1 0x55ceaea71d12 in objspace_xmalloc0 gc.c:9416:5 #2 0x55ceaea71cd2 in ruby_xmalloc2_body gc.c:9623:12 #3 0x55ceaea7d09c in ruby_xmalloc2 gc.c:11479:12 #4 0x55ceaf00c3b7 in rb_thread_recycle_stack vm.c:2462:12 #5 0x55ceaf012256 in th_init vm.c:2656:29 #6 0x55ceaf00d5eb in ruby_thread_init vm.c:2690:5 #7 0x55ceaf00d4b1 in rb_thread_alloc vm.c:2703:5 #8 0x55ceaef0038b in thread_s_new thread.c:872:20 #9 0x55ceaf04d8c1 in call_cfunc_m1 vm_insnhelper.c:2041:12 #10 0x55ceaf03118d in vm_call_cfunc_with_frame vm_insnhelper.c:2207:11 #11 0x55ceaf017985 in vm_call_cfunc vm_insnhelper.c:2225:12 #12 0x55ceaf01548b in vm_call_method_each_type vm_insnhelper.c:2560:9 #13 0x55ceaf014c96 in vm_call_method vm_insnhelper.c:2686:13 ruby#14 0x55ceaefb5de4 in vm_call_general vm_insnhelper.c:2730:12 ruby#15 0x55ceaf03c868 in vm_sendish vm_insnhelper.c:3623:11 ruby#16 0x55ceaefc95bb in vm_exec_core insns.def:771:11 ruby#17 0x55ceaf006700 in rb_vm_exec vm.c:1892:22 ruby#18 0x55ceaf00acbf in rb_iseq_eval_main vm.c:2151:11 ruby#19 0x55ceaea250ca in ruby_exec_internal eval.c:262:2 #20 0x55ceaea2498b in ruby_exec_node eval.c:326:12 ruby#21 0x55ceaea247d0 in ruby_run_node eval.c:318:25 ruby#22 0x55ceae88c486 in main main.c:42:9 ruby#23 0x7fc874330b96 in __libc_start_main /build/glibc-OTsEL5/glibc-2.27/csu/../csu/libc-start.c:310 SUMMARY: AddressSanitizer: heap-buffer-overflow vm_insnhelper.c:217:24 in vm_check_canary Shadow bytes around the buggy address: 0x0ff98de5e8b0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 0x0ff98de5e8c0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 0x0ff98de5e8d0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 0x0ff98de5e8e0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 0x0ff98de5e8f0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 =>0x0ff98de5e900: fa fa[fa]fa fa fa fa fa fa fa fa fa fa fa fa fa 0x0ff98de5e910: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa 0x0ff98de5e920: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa 0x0ff98de5e930: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa 0x0ff98de5e940: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa 0x0ff98de5e950: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa Shadow byte legend (one shadow byte represents 8 application bytes): Addressable: 00 Partially addressable: 01 02 03 04 05 06 07 Heap left redzone: fa Freed heap region: fd Stack left redzone: f1 Stack mid redzone: f2 Stack right redzone: f3 Stack after return: f5 Stack use after scope: f8 Global redzone: f9 Global init order: f6 Poisoned by user: f7 Container overflow: fc Array cookie: ac Intra object redzone: bb ASan internal: fe Left alloca redzone: ca Right alloca redzone: cb Shadow gap: cc ==82954==ABORTING

rb_io_fptr_finalize_internal frees the memory region. ================================================================= ==85264==ERROR: AddressSanitizer: heap-use-after-free on address 0x610000000d8c at pc 0x5608e38077f7 bp 0x7ffee12d5440 sp 0x7ffee12d5438 READ of size 4 at 0x610000000d8c thread T0 #0 0x5608e38077f6 in rb_io_memsize io.c:4749:24 #1 0x5608e37a0481 in obj_memsize_of gc.c:3547:14 #2 0x5608e37a4f30 in check_rvalue_consistency gc.c:1107:2 #3 0x5608e37a2624 in RVALUE_OLD_P gc.c:1218:5 #4 0x5608e37a5bae in rb_gc_force_recycle gc.c:6652:18 #5 0x5608e38191f9 in rb_f_backquote io.c:9021:5 #6 0x5608e3d8aa14 in call_cfunc_1 vm_insnhelper.c:2058:12 #7 0x5608e3d6e23d in vm_call_cfunc_with_frame vm_insnhelper.c:2211:11 #8 0x5608e3d54a35 in vm_call_cfunc vm_insnhelper.c:2229:12 #9 0x5608e3d5253b in vm_call_method_each_type vm_insnhelper.c:2564:9 #10 0x5608e3d51f50 in vm_call_method vm_insnhelper.c:2701:13 #11 0x5608e3cf2de4 in vm_call_general vm_insnhelper.c:2734:12 #12 0x5608e3d79918 in vm_sendish vm_insnhelper.c:3627:11 #13 0x5608e3d06cf5 in vm_exec_core insns.def:789:11 ruby#14 0x5608e3d43700 in rb_vm_exec vm.c:1892:22 ruby#15 0x5608e3d47cbf in rb_iseq_eval_main vm.c:2151:11 ruby#16 0x5608e37620ca in ruby_exec_internal eval.c:262:2 ruby#17 0x5608e376198b in ruby_exec_node eval.c:326:12 ruby#18 0x5608e37617d0 in ruby_run_node eval.c:318:25 ruby#19 0x5608e35c9486 in main main.c:42:9 #20 0x7f62e9421b96 in __libc_start_main /build/glibc-OTsEL5/glibc-2.27/csu/../csu/libc-start.c:310 ruby#21 0x5608e3522289 in _start (miniruby+0x15f289) 0x610000000d8c is located 76 bytes inside of 192-byte region [0x610000000d40,0x610000000e00) freed by thread T0 here: #0 0x5608e359a2ed in free (miniruby+0x1d72ed) #1 0x5608e37af421 in objspace_xfree gc.c:9591:5 #2 0x5608e37af3da in ruby_sized_xfree gc.c:9687:2 #3 0x5608e3799ac8 in ruby_xfree gc.c:9694:5 #4 0x5608e380746d in rb_io_fptr_finalize_internal io.c:4728:5 #5 0x5608e38191ed in rb_f_backquote io.c:9020:5 #6 0x5608e3d8aa14 in call_cfunc_1 vm_insnhelper.c:2058:12 #7 0x5608e3d6e23d in vm_call_cfunc_with_frame vm_insnhelper.c:2211:11 #8 0x5608e3d54a35 in vm_call_cfunc vm_insnhelper.c:2229:12 #9 0x5608e3d5253b in vm_call_method_each_type vm_insnhelper.c:2564:9 #10 0x5608e3d51f50 in vm_call_method vm_insnhelper.c:2701:13 #11 0x5608e3cf2de4 in vm_call_general vm_insnhelper.c:2734:12 #12 0x5608e3d79918 in vm_sendish vm_insnhelper.c:3627:11 #13 0x5608e3d06cf5 in vm_exec_core insns.def:789:11 ruby#14 0x5608e3d43700 in rb_vm_exec vm.c:1892:22 ruby#15 0x5608e3d47cbf in rb_iseq_eval_main vm.c:2151:11 ruby#16 0x5608e37620ca in ruby_exec_internal eval.c:262:2 ruby#17 0x5608e376198b in ruby_exec_node eval.c:326:12 ruby#18 0x5608e37617d0 in ruby_run_node eval.c:318:25 ruby#19 0x5608e35c9486 in main main.c:42:9 #20 0x7f62e9421b96 in __libc_start_main /build/glibc-OTsEL5/glibc-2.27/csu/../csu/libc-start.c:310 previously allocated by thread T0 here: #0 0x5608e359a56d in malloc (miniruby+0x1d756d) #1 0x5608e37aed12 in objspace_xmalloc0 gc.c:9416:5 #2 0x5608e37aebe7 in ruby_xmalloc0 gc.c:9600:12 #3 0x5608e37aea8b in ruby_xmalloc_body gc.c:9609:12 #4 0x5608e37a6d64 in ruby_xmalloc gc.c:11469:12 #5 0x5608e380e4b4 in rb_io_fptr_new io.c:8040:19 #6 0x5608e380e446 in rb_io_make_open_file io.c:8077:10 #7 0x5608e3850ea0 in pipe_open io.c:6707:5 #8 0x5608e384edb4 in pipe_open_s io.c:6772:12 #9 0x5608e381910b in rb_f_backquote io.c:9014:12 #10 0x5608e3d8aa14 in call_cfunc_1 vm_insnhelper.c:2058:12 #11 0x5608e3d6e23d in vm_call_cfunc_with_frame vm_insnhelper.c:2211:11 #12 0x5608e3d54a35 in vm_call_cfunc vm_insnhelper.c:2229:12 #13 0x5608e3d5253b in vm_call_method_each_type vm_insnhelper.c:2564:9 ruby#14 0x5608e3d51f50 in vm_call_method vm_insnhelper.c:2701:13 ruby#15 0x5608e3cf2de4 in vm_call_general vm_insnhelper.c:2734:12 ruby#16 0x5608e3d79918 in vm_sendish vm_insnhelper.c:3627:11 ruby#17 0x5608e3d06cf5 in vm_exec_core insns.def:789:11 ruby#18 0x5608e3d43700 in rb_vm_exec vm.c:1892:22 ruby#19 0x5608e3d47cbf in rb_iseq_eval_main vm.c:2151:11 #20 0x5608e37620ca in ruby_exec_internal eval.c:262:2 ruby#21 0x5608e376198b in ruby_exec_node eval.c:326:12 ruby#22 0x5608e37617d0 in ruby_run_node eval.c:318:25 ruby#23 0x5608e35c9486 in main main.c:42:9 ruby#24 0x7f62e9421b96 in __libc_start_main /build/glibc-OTsEL5/glibc-2.27/csu/../csu/libc-start.c:310 SUMMARY: AddressSanitizer: heap-use-after-free io.c:4749:24 in rb_io_memsize Shadow bytes around the buggy address: 0x0c207fff8160: fa fa fa fa fa fa fa fa 00 00 00 00 00 00 00 00 0x0c207fff8170: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 0x0c207fff8180: fa fa fa fa fa fa fa fa 00 00 00 00 00 00 00 00 0x0c207fff8190: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 0x0c207fff81a0: fa fa fa fa fa fa fa fa fd fd fd fd fd fd fd fd =>0x0c207fff81b0: fd[fd]fd fd fd fd fd fd fd fd fd fd fd fd fd fd 0x0c207fff81c0: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa 0x0c207fff81d0: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa 0x0c207fff81e0: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa 0x0c207fff81f0: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa 0x0c207fff8200: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa Shadow byte legend (one shadow byte represents 8 application bytes): Addressable: 00 Partially addressable: 01 02 03 04 05 06 07 Heap left redzone: fa Freed heap region: fd Stack left redzone: f1 Stack mid redzone: f2 Stack right redzone: f3 Stack after return: f5 Stack use after scope: f8 Global redzone: f9 Global init order: f6 Poisoned by user: f7 Container overflow: fc Array cookie: ac Intra object redzone: bb ASan internal: fe Left alloca redzone: ca Right alloca redzone: cb Shadow gap: cc ==85264==ABORTING

…Fixes #10) This restores compatibility with previous versions. This behavior was previously undefined, but it makes sense for the name of the defined method to be returned. ruby/forwardable@a52ef3451e

This changeset makes no difference unless GC_DEBUG is on. When that flag is set, struct RVALUE is bigger than struct RObject. We have to take care of the additional fields. Otherwise we get a SIGSEGV like shown below. The way obj is initialized in this patch works for both GC_DEBUG is on and off. See also ISO/IEC 9899:1999 section 6.7.8 paragraph ruby#21. ``` Program received signal SIGSEGV, Segmentation fault. __strlen_avx2 () at ../sysdeps/x86_64/multiarch/strlen-avx2.S:62 62 ../sysdeps/x86_64/multiarch/strlen-avx2.S: No such file or directory (gdb) bt #0 __strlen_avx2 () at ../sysdeps/x86_64/multiarch/strlen-avx2.S:62 #1 0x00005555557dd9a7 in BSD_vfprintf (fp=0x7fffffff6be0, fmt0=0x5555558f3059 "@%s:%d", ap=0x7fffffff6dd0) at vsnprintf.c:1027 #2 0x00005555557db6f5 in ruby_do_vsnprintf (str=0x555555bfc58d <obj_info_buffers+1325> "", n=211, fmt=0x5555558f3059 "@%s:%d", ap=0x7fffffff6dd0) at sprintf.c:1022 #3 0x00005555557db909 in ruby_snprintf (str=0x555555bfc58d <obj_info_buffers+1325> "", n=211, fmt=0x5555558f3059 "@%s:%d") at sprintf.c:1040 #4 0x0000555555661ef4 in rb_raw_obj_info (buff=0x555555bfc560 <obj_info_buffers+1280> "0x0000555555d2bfa0 [0 ] T_STRING (String)", buff_size=256, obj=93825000456096) at gc.c:11449 #5 0x000055555565baaf in obj_info (obj=93825000456096) at gc.c:11612 #6 0x000055555565bae1 in rgengc_remembered (objspace=0x555555c0a1c0, obj=93825000456096) at gc.c:6618 #7 0x0000555555666987 in newobj_init (klass=93824999964192, flags=5, v1=0, v2=0, v3=0, wb_protected=1, objspace=0x555555c0a1c0, obj=93825000456096) at gc.c:2134 #8 0x0000555555666e49 in newobj_slowpath (klass=93824999964192, flags=5, v1=0, v2=0, v3=0, objspace=0x555555c0a1c0, wb_protected=1) at gc.c:2209 #9 0x0000555555666b94 in newobj_slowpath_wb_protected (klass=93824999964192, flags=5, v1=0, v2=0, v3=0, objspace=0x555555c0a1c0) at gc.c:2220 #10 0x000055555565751b in newobj_of (klass=93824999964192, flags=5, v1=0, v2=0, v3=0, wb_protected=1) at gc.c:2256 #11 0x00005555556575ca in rb_wb_protected_newobj_of (klass=93824999964192, flags=5) at gc.c:2272 #12 0x00005555557f36ea in str_alloc (klass=93824999964192) at string.c:728 #13 0x00005555557f2128 in rb_str_buf_new (capa=0) at string.c:1317 ruby#14 0x000055555578c66d in rb_reg_preprocess (p=0x555555cc8148 "^-(.)(.+)?", end=0x555555cc8152 "", enc=0x555555cc7c80, fixed_enc=0x7fffffff74e8, err=0x7fffffff75f0 "") at re.c:2682 ruby#15 0x000055555578ea13 in rb_reg_initialize (obj=93825000046736, s=0x555555cc8148 "^-(.)(.+)?", len=10, enc=0x555555cc7c80, options=0, err=0x7fffffff75f0 "", sourcefile=0x555555d1a5c0 "lib/optparse.rb", sourceline=1460) at re.c:2808 ruby#16 0x000055555578e285 in rb_reg_initialize_str (obj=93825000046736, str=93825000046904, options=0, err=0x7fffffff75f0 "", sourcefile=0x555555d1a5c0 "lib/optparse.rb", sourceline=1460) at re.c:2869 ruby#17 0x000055555578ee02 in rb_reg_compile (str=93825000046904, options=0, sourcefile=0x555555d1a5c0 "lib/optparse.rb", sourceline=1460) at re.c:2958 ruby#18 0x0000555555748dfb in rb_parser_reg_compile (p=0x555555d1f760, str=93825000046904, options=0) at parse.y:12157 ruby#19 0x00005555557581c3 in parser_reg_compile (p=0x555555d1f760, str=93825000046904, options=0) at parse.y:12151 #20 0x00005555557580ac in reg_compile (p=0x555555d1f760, str=93825000046904, options=0) at parse.y:12167 ruby#21 0x0000555555746ebb in new_regexp (p=0x555555d1f760, node=0x555555dece68, options=0, loc=0x7fffffff89e8) at parse.y:10072 ruby#22 0x000055555573d1f5 in ruby_yyparse (p=0x555555d1f760) at parse.y:4395 ruby#23 0x000055555574a582 in yycompile0 (arg=93825000404832) at parse.y:5945 ruby#24 0x00005555558c6898 in rb_suppress_tracing (func=0x55555574a470 <yycompile0>, arg=93825000404832) at vm_trace.c:427 ruby#25 0x0000555555748290 in yycompile (vparser=93824999283456, p=0x555555d1f760, fname=93824999283624, line=1) at parse.y:5994 ruby#26 0x00005555557481ae in rb_parser_compile_file_path (vparser=93824999283456, fname=93824999283624, file=93824999283400, start=1) at parse.y:6098 ruby#27 0x00005555557cdd35 in load_file_internal (argp_v=140737488331760) at ruby.c:2023 ruby#28 0x00005555556438c5 in rb_ensure (b_proc=0x5555557cd610 <load_file_internal>, data1=140737488331760, e_proc=0x5555557cddd0 <restore_load_file>, data2=140737488331760) at eval.c:1128 ruby#29 0x00005555557cb68b in load_file (parser=93824999283456, fname=93824999283624, f=93824999283400, script=0, opt=0x7fffffffa468) at ruby.c:2142 ruby#30 0x00005555557cb339 in rb_parser_load_file (parser=93824999283456, fname_v=93824999283624) at ruby.c:2164 ruby#31 0x00005555556ba3e1 in load_iseq_eval (ec=0x555555c0a650, fname=93824999283624) at load.c:579 ruby#32 0x00005555556b857a in require_internal (ec=0x555555c0a650, fname=93824999284352, exception=1) at load.c:1016 ruby#33 0x00005555556b7967 in rb_require_string (fname=93824999284464) at load.c:1105 ruby#34 0x00005555556b7939 in rb_f_require (obj=93824999994824, fname=93824999284464) at load.c:811 ruby#35 0x00005555558b7ae0 in call_cfunc_1 (recv=93824999994824, argc=1, argv=0x7ffff7ecd0a8, func=0x5555556b7920 <rb_f_require>) at vm_insnhelper.c:2348 ruby#36 0x00005555558a8889 in vm_call_cfunc_with_frame (ec=0x555555c0a650, reg_cfp=0x7ffff7fccfa0, calling=0x7fffffffaab0, cd=0x555555d76a10, empty_kw_splat=0) at vm_insnhelper.c:2513 ruby#37 0x000055555589fb5c in vm_call_cfunc (ec=0x555555c0a650, reg_cfp=0x7ffff7fccfa0, calling=0x7fffffffaab0, cd=0x555555d76a10) at vm_insnhelper.c:2538 ruby#38 0x000055555589f22e in vm_call_method_each_type (ec=0x555555c0a650, cfp=0x7ffff7fccfa0, calling=0x7fffffffaab0, cd=0x555555d76a10) at vm_insnhelper.c:2924 ruby#39 0x000055555589ef47 in vm_call_method (ec=0x555555c0a650, cfp=0x7ffff7fccfa0, calling=0x7fffffffaab0, cd=0x555555d76a10) at vm_insnhelper.c:3038 ruby#40 0x0000555555866dbd in vm_call_general (ec=0x555555c0a650, reg_cfp=0x7ffff7fccfa0, calling=0x7fffffffaab0, cd=0x555555d76a10) at vm_insnhelper.c:3075 ruby#41 0x00005555558ae557 in vm_sendish (ec=0x555555c0a650, reg_cfp=0x7ffff7fccfa0, cd=0x555555d76a10, block_handler=0, method_explorer=0x5555558ae5d0 <vm_search_method_wrap>) at vm_insnhelper.c:4021 ruby#42 0x000055555587745b in vm_exec_core (ec=0x555555c0a650, initial=0) at insns.def:801 ruby#43 0x0000555555899b9c in rb_vm_exec (ec=0x555555c0a650, mjit_enable_p=1) at vm.c:1907 ruby#44 0x000055555589aaf0 in rb_iseq_eval_main (iseq=0x555555c1da80) at vm.c:2166 ruby#45 0x0000555555641f0b in rb_ec_exec_node (ec=0x555555c0a650, n=0x555555c1da80) at eval.c:277 ruby#46 0x0000555555641d62 in ruby_run_node (n=0x555555c1da80) at eval.c:335 ruby#47 0x000055555557a188 in main (argc=11, argv=0x7fffffffc848) at main.c:50 (gdb) fr 7 #7 0x0000555555666987 in newobj_init (klass=93824999964192, flags=5, v1=0, v2=0, v3=0, wb_protected=1, objspace=0x555555c0a1c0, obj=93825000456096) at gc.c:2134 2134 if (rgengc_remembered(objspace, (VALUE)obj)) rb_bug("newobj: %s is remembered.", obj_info(obj)); (gdb) p ((struct RVALUE*)obj)->file $1 = 0x65a5992b0fb25ce7 <error: Cannot access memory at address 0x65a5992b0fb25ce7> (gdb) ```

This reverts commit 02b216e. This reverts commit 9b8825b. I found that combining sweep and move is not safe. I don't think that we can do compaction concurrently with _anything_ unless there is a read barrier installed. Here is a simple example. A class object is freed, and during it's free step, it tries to remove itself from its parent's subclass list. However, during the sweep step, the parent class was moved and the "currently being freed" class didn't have references updated yet. So we get a segv like this: ``` (lldb) bt * thread #1, name = 'ruby', stop reason = signal SIGSEGV * frame #0: 0x0000560763e344cb ruby`rb_st_lookup at st.c:320:43 frame #1: 0x0000560763e344cb ruby`rb_st_lookup(tab=0x2f7469672f6e6f72, key=3809, value=0x0000560765bf2270) at st.c:1010 frame #2: 0x0000560763e8f16a ruby`rb_search_class_path at variable.c:99:9 frame #3: 0x0000560763e8f141 ruby`rb_search_class_path at variable.c:145 frame #4: 0x0000560763e8f141 ruby`rb_search_class_path(klass=94589785585880) at variable.c:191 frame #5: 0x0000560763ec744e ruby`rb_vm_bugreport at vm_dump.c:996:17 frame #6: 0x0000560763f5b958 ruby`rb_bug_for_fatal_signal at error.c:675:5 frame #7: 0x0000560763e27dad ruby`sigsegv(sig=<unavailable>, info=<unavailable>, ctx=<unavailable>) at signal.c:955:5 frame #8: 0x00007f8b891d33c0 libpthread.so.0`___lldb_unnamed_symbol1$$libpthread.so.0 + 1 frame #9: 0x0000560763efa8bb ruby`rb_class_remove_from_super_subclasses(klass=94589790314280) at class.c:93:56 frame #10: 0x0000560763d10cb7 ruby`gc_sweep_step at gc.c:2674:2 frame #11: 0x0000560763d1187b ruby`gc_sweep at gc.c:4540:2 frame #12: 0x0000560763d101f0 ruby`gc_start at gc.c:6797:6 frame #13: 0x0000560763d15153 ruby`rb_gc_compact at gc.c:7479:12 frame ruby#14: 0x0000560763eb4eb8 ruby`vm_exec_core at vm_insnhelper.c:5183:13 frame ruby#15: 0x0000560763ea9bae ruby`rb_vm_exec at vm.c:1953:22 frame ruby#16: 0x0000560763eac08d ruby`rb_yield at vm.c:1132:9 frame ruby#17: 0x0000560763edb4f2 ruby`rb_ary_collect at array.c:3186:9 frame ruby#18: 0x0000560763e9ee15 ruby`vm_call_cfunc_with_frame at vm_insnhelper.c:2575:12 frame ruby#19: 0x0000560763eb2e66 ruby`vm_exec_core at vm_insnhelper.c:4177:11 frame #20: 0x0000560763ea9bae ruby`rb_vm_exec at vm.c:1953:22 frame ruby#21: 0x0000560763eac08d ruby`rb_yield at vm.c:1132:9 frame ruby#22: 0x0000560763edb4f2 ruby`rb_ary_collect at array.c:3186:9 frame ruby#23: 0x0000560763e9ee15 ruby`vm_call_cfunc_with_frame at vm_insnhelper.c:2575:12 frame ruby#24: 0x0000560763eb2e66 ruby`vm_exec_core at vm_insnhelper.c:4177:11 frame ruby#25: 0x0000560763ea9bae ruby`rb_vm_exec at vm.c:1953:22 frame ruby#26: 0x0000560763ceee01 ruby`rb_ec_exec_node(ec=0x0000560765afa530, n=0x0000560765b088e0) at eval.c:296:2 frame ruby#27: 0x0000560763cf3b7b ruby`ruby_run_node(n=0x0000560765b088e0) at eval.c:354:12 frame ruby#28: 0x0000560763cee4a3 ruby`main(argc=<unavailable>, argv=<unavailable>) at main.c:50:9 frame ruby#29: 0x00007f8b88e560b3 libc.so.6`__libc_start_main + 243 frame ruby#30: 0x0000560763cee4ee ruby`_start + 46 (lldb) f 9 frame #9: 0x0000560763efa8bb ruby`rb_class_remove_from_super_subclasses(klass=94589790314280) at class.c:93:56 90 91 *RCLASS_EXT(klass)->parent_subclasses = entry->next; 92 if (entry->next) { -> 93 RCLASS_EXT(entry->next->klass)->parent_subclasses = RCLASS_EXT(klass)->parent_subclasses; 94 } 95 xfree(entry); 96 } (lldb) command script import -r misc/lldb_cruby.py lldb scripts for ruby has been installed. (lldb) rp entry->next->klass (struct RMoved) $1 = (flags = 30, destination = 94589792806680, next = 94589784369160) (lldb) ```

eliminate use of freed memory rb_io_fptr_finalize_internal frees the memory region. ================================================================= ==85264==ERROR: AddressSanitizer: heap-use-after-free on address 0x610000000d8c at pc 0x5608e38077f7 bp 0x7ffee12d5440 sp 0x7ffee12d5438 READ of size 4 at 0x610000000d8c thread T0 #0 0x5608e38077f6 in rb_io_memsize io.c:4749:24 #1 0x5608e37a0481 in obj_memsize_of gc.c:3547:14 #2 0x5608e37a4f30 in check_rvalue_consistency gc.c:1107:2 #3 0x5608e37a2624 in RVALUE_OLD_P gc.c:1218:5 #4 0x5608e37a5bae in rb_gc_force_recycle gc.c:6652:18 #5 0x5608e38191f9 in rb_f_backquote io.c:9021:5 #6 0x5608e3d8aa14 in call_cfunc_1 vm_insnhelper.c:2058:12 #7 0x5608e3d6e23d in vm_call_cfunc_with_frame vm_insnhelper.c:2211:11 #8 0x5608e3d54a35 in vm_call_cfunc vm_insnhelper.c:2229:12 #9 0x5608e3d5253b in vm_call_method_each_type vm_insnhelper.c:2564:9 #10 0x5608e3d51f50 in vm_call_method vm_insnhelper.c:2701:13 #11 0x5608e3cf2de4 in vm_call_general vm_insnhelper.c:2734:12 #12 0x5608e3d79918 in vm_sendish vm_insnhelper.c:3627:11 #13 0x5608e3d06cf5 in vm_exec_core insns.def:789:11 ruby#14 0x5608e3d43700 in rb_vm_exec vm.c:1892:22 ruby#15 0x5608e3d47cbf in rb_iseq_eval_main vm.c:2151:11 ruby#16 0x5608e37620ca in ruby_exec_internal eval.c:262:2 ruby#17 0x5608e376198b in ruby_exec_node eval.c:326:12 ruby#18 0x5608e37617d0 in ruby_run_node eval.c:318:25 ruby#19 0x5608e35c9486 in main main.c:42:9 #20 0x7f62e9421b96 in __libc_start_main /build/glibc-OTsEL5/glibc-2.27/csu/../csu/libc-start.c:310 ruby#21 0x5608e3522289 in _start (miniruby+0x15f289) 0x610000000d8c is located 76 bytes inside of 192-byte region [0x610000000d40,0x610000000e00) freed by thread T0 here: #0 0x5608e359a2ed in free (miniruby+0x1d72ed) #1 0x5608e37af421 in objspace_xfree gc.c:9591:5 #2 0x5608e37af3da in ruby_sized_xfree gc.c:9687:2 #3 0x5608e3799ac8 in ruby_xfree gc.c:9694:5 #4 0x5608e380746d in rb_io_fptr_finalize_internal io.c:4728:5 #5 0x5608e38191ed in rb_f_backquote io.c:9020:5 #6 0x5608e3d8aa14 in call_cfunc_1 vm_insnhelper.c:2058:12 #7 0x5608e3d6e23d in vm_call_cfunc_with_frame vm_insnhelper.c:2211:11 #8 0x5608e3d54a35 in vm_call_cfunc vm_insnhelper.c:2229:12 #9 0x5608e3d5253b in vm_call_method_each_type vm_insnhelper.c:2564:9 #10 0x5608e3d51f50 in vm_call_method vm_insnhelper.c:2701:13 #11 0x5608e3cf2de4 in vm_call_general vm_insnhelper.c:2734:12 #12 0x5608e3d79918 in vm_sendish vm_insnhelper.c:3627:11 #13 0x5608e3d06cf5 in vm_exec_core insns.def:789:11 ruby#14 0x5608e3d43700 in rb_vm_exec vm.c:1892:22 ruby#15 0x5608e3d47cbf in rb_iseq_eval_main vm.c:2151:11 ruby#16 0x5608e37620ca in ruby_exec_internal eval.c:262:2 ruby#17 0x5608e376198b in ruby_exec_node eval.c:326:12 ruby#18 0x5608e37617d0 in ruby_run_node eval.c:318:25 ruby#19 0x5608e35c9486 in main main.c:42:9 #20 0x7f62e9421b96 in __libc_start_main /build/glibc-OTsEL5/glibc-2.27/csu/../csu/libc-start.c:310 previously allocated by thread T0 here: #0 0x5608e359a56d in malloc (miniruby+0x1d756d) #1 0x5608e37aed12 in objspace_xmalloc0 gc.c:9416:5 #2 0x5608e37aebe7 in ruby_xmalloc0 gc.c:9600:12 #3 0x5608e37aea8b in ruby_xmalloc_body gc.c:9609:12 #4 0x5608e37a6d64 in ruby_xmalloc gc.c:11469:12 #5 0x5608e380e4b4 in rb_io_fptr_new io.c:8040:19 #6 0x5608e380e446 in rb_io_make_open_file io.c:8077:10 #7 0x5608e3850ea0 in pipe_open io.c:6707:5 #8 0x5608e384edb4 in pipe_open_s io.c:6772:12 #9 0x5608e381910b in rb_f_backquote io.c:9014:12 #10 0x5608e3d8aa14 in call_cfunc_1 vm_insnhelper.c:2058:12 #11 0x5608e3d6e23d in vm_call_cfunc_with_frame vm_insnhelper.c:2211:11 #12 0x5608e3d54a35 in vm_call_cfunc vm_insnhelper.c:2229:12 #13 0x5608e3d5253b in vm_call_method_each_type vm_insnhelper.c:2564:9 ruby#14 0x5608e3d51f50 in vm_call_method vm_insnhelper.c:2701:13 ruby#15 0x5608e3cf2de4 in vm_call_general vm_insnhelper.c:2734:12 ruby#16 0x5608e3d79918 in vm_sendish vm_insnhelper.c:3627:11 ruby#17 0x5608e3d06cf5 in vm_exec_core insns.def:789:11 ruby#18 0x5608e3d43700 in rb_vm_exec vm.c:1892:22 ruby#19 0x5608e3d47cbf in rb_iseq_eval_main vm.c:2151:11 #20 0x5608e37620ca in ruby_exec_internal eval.c:262:2 ruby#21 0x5608e376198b in ruby_exec_node eval.c:326:12 ruby#22 0x5608e37617d0 in ruby_run_node eval.c:318:25 ruby#23 0x5608e35c9486 in main main.c:42:9 ruby#24 0x7f62e9421b96 in __libc_start_main /build/glibc-OTsEL5/glibc-2.27/csu/../csu/libc-start.c:310 SUMMARY: AddressSanitizer: heap-use-after-free io.c:4749:24 in rb_io_memsize Shadow bytes around the buggy address: 0x0c207fff8160: fa fa fa fa fa fa fa fa 00 00 00 00 00 00 00 00 0x0c207fff8170: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 0x0c207fff8180: fa fa fa fa fa fa fa fa 00 00 00 00 00 00 00 00 0x0c207fff8190: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 0x0c207fff81a0: fa fa fa fa fa fa fa fa fd fd fd fd fd fd fd fd =>0x0c207fff81b0: fd[fd]fd fd fd fd fd fd fd fd fd fd fd fd fd fd 0x0c207fff81c0: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa 0x0c207fff81d0: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa 0x0c207fff81e0: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa 0x0c207fff81f0: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa 0x0c207fff8200: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa Shadow byte legend (one shadow byte represents 8 application bytes): Addressable: 00 Partially addressable: 01 02 03 04 05 06 07 Heap left redzone: fa Freed heap region: fd Stack left redzone: f1 Stack mid redzone: f2 Stack right redzone: f3 Stack after return: f5 Stack use after scope: f8 Global redzone: f9 Global init order: f6 Poisoned by user: f7 Container overflow: fc Array cookie: ac Intra object redzone: bb ASan internal: fe Left alloca redzone: ca Right alloca redzone: cb Shadow gap: cc ==85264==ABORTING git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/branches/ruby_2_6@67710 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

This commit adds a check on the ep just like in the mark function. The env can contain null bytes if allocation tracing is enabled. We're seeing errors during autocompaction like this: ``` (lldb) bt 40 * thread #1, name = 'ruby', stop reason = signal SIGABRT frame #0: 0x00007f7d64b6018b libc.so.6`raise + 203 frame #1: 0x00007f7d64b3f859 libc.so.6`abort + 299 frame #2: 0x000055af5f2fefc9 ruby`die at error.c:764:5 frame #3: 0x000055af5f2ff1ac ruby`rb_bug_for_fatal_signal(default_sighandler=0x0000000000000000, sig=11, ctx=0x000055af60bc3340, fmt="") at error.c:804:5 frame #4: 0x000055af5f4bd08f ruby`sigsegv(sig=11, info=0x000055af60bc3470, ctx=0x000055af60bc3340) at signal.c:960:5 frame #5: 0x00007f7d64ebe3c0 libpthread.so.0`__restore_rt frame #6: 0x000055af5f339b0a ruby`gc_ref_update_imemo(objspace=0x000055af60b2b040, obj=0x00007f7d5b513fd0) at gc.c:9046:13 frame #7: 0x000055af5f339172 ruby`gc_update_object_references(objspace=0x000055af60b2b040, obj=0x00007f7d5b513fd0) at gc.c:9307:9 frame #8: 0x000055af5f338e79 ruby`gc_ref_update(vstart=0x00007f7d5b510010, vend=0x00007f7d5b513ff8, stride=40, objspace=0x000055af60b2b040, page=0x000055af62577aa0) at gc.c:9452:21 frame #9: 0x000055af5f337846 ruby`gc_update_references(objspace=0x000055af60b2b040, heap=0x000055af60b2b068) at gc.c:9481:9 frame #10: 0x000055af5f336569 ruby`gc_compact_finish(objspace=0x000055af60b2b040, heap=0x000055af60b2b068) at gc.c:4840:5 frame #11: 0x000055af5f335efb ruby`gc_page_sweep(objspace=0x000055af60b2b040, heap=0x000055af60b2b068, sweep_page=0x000055af63a1eb30) at gc.c:5046:13 frame #12: 0x000055af5f3355c5 ruby`gc_sweep_step(objspace=0x000055af60b2b040, heap=0x000055af60b2b068) at gc.c:5214:19 frame #13: 0x000055af5f33daf6 ruby`gc_sweep_rest(objspace=0x000055af60b2b040) at gc.c:5271:2 frame ruby#14: 0x000055af5f33cacd ruby`gc_sweep(objspace=0x000055af60b2b040) at gc.c:5389:2 frame ruby#15: 0x000055af5f33c21d ruby`gc_marks_rest(objspace=0x000055af60b2b040) at gc.c:7555:5 frame ruby#16: 0x000055af5f324d41 ruby`gc_rest(objspace=0x000055af60b2b040) at gc.c:8457:13 frame ruby#17: 0x000055af5f3297d8 ruby`garbage_collect(objspace=0x000055af60b2b040, reason=45568) at gc.c:8318:9 frame ruby#18: 0x000055af5f344ece ruby`garbage_collect_with_gvl(objspace=0x000055af60b2b040, reason=45568) at gc.c:8632:9 frame ruby#19: 0x000055af5f344e61 ruby`objspace_malloc_gc_stress(objspace=0x000055af60b2b040) at gc.c:10592:9 frame #20: 0x000055af5f32ced1 ruby`objspace_xmalloc0(objspace=0x000055af60b2b040, size=64) at gc.c:10767:5 frame ruby#21: 0x000055af5f32ce11 ruby`ruby_xmalloc0(size=64) at gc.c:10988:12 frame ruby#22: 0x000055af5f32cdac ruby`ruby_xmalloc_body(size=64) at gc.c:10997:12 frame ruby#23: 0x000055af5f329415 ruby`ruby_xmalloc(size=64) at gc.c:12942:12 frame ruby#24: 0x00007f7d611c4fe5 objspace.so`newobj_i(tpval=0x00007f7d5b553770, data=0x000055af639031a0) at object_tracing.c:101:35 frame ruby#25: 0x000055af5f5b283f ruby`tp_call_trace(tpval=0x00007f7d5b553770, trace_arg=0x00007fff1016d398) at vm_trace.c:1115:2 frame ruby#26: 0x000055af5f5b50ec ruby`exec_hooks_body(ec=0x000055af60b2b700, list=0x000055af60b2b920, trace_arg=0x00007fff1016d398) at vm_trace.c:304:3 frame ruby#27: 0x000055af5f5b0f24 ruby`exec_hooks_unprotected(ec=0x000055af60b2b700, list=0x000055af60b2b920, trace_arg=0x00007fff1016d398) at vm_trace.c:333:5 frame ruby#28: 0x000055af5f5b0da8 ruby`rb_exec_event_hooks(trace_arg=0x00007fff1016d398, hooks=0x000055af60b2b920, pop_p=0) at vm_trace.c:378:13 frame ruby#29: 0x000055af5f33f8e2 ruby`rb_exec_event_hook_orig(ec=0x000055af60b2b700, hooks=0x000055af60b2b920, flag=1048576, self=0x00007f7d5b5c08c0, id=0, called_id=0, klass=0x0000000000000000, data=0x00007f7d5b513fd0, pop_p=0) at vm_core.h:1989:5 frame ruby#30: 0x000055af5f334975 ruby`gc_event_hook_body(ec=0x000055af60b2b700, objspace=0x000055af60b2b040, event=1048576, data=0x00007f7d5b513fd0) at gc.c:2083:5 * frame ruby#31: 0x000055af5f3342df ruby`newobj_slowpath_wb_protected [inlined] newobj_slowpath(klass=0x00007f7d5b9d19c8, flags=0x000000000000001a, objspace=0x000055af60b2b040, cr=0x000055af60b2b910, wb_protected=1) at gc.c:2284:9 frame ruby#32: 0x000055af5f33410f ruby`newobj_slowpath_wb_protected(klass=0x00007f7d5b9d19c8, flags=0x000000000000001a, objspace=0x000055af60b2b040, cr=0x000055af60b2b910) at gc.c:2299 frame ruby#33: 0x000055af5f333de9 ruby`newobj_of0(klass=0x00007f7d5b9d19c8, flags=0x000000000000001a, wb_protected=1, cr=0x000055af60b2b910) at gc.c:2338:11 frame ruby#34: 0x000055af5f3227ae ruby`newobj_of(klass=0x00007f7d5b9d19c8, flags=0x000000000000001a, v1=0x000055af657d88a0, v2=0x000055af657d8890, v3=0x0000000000000000, wb_protected=1) at gc.c:2348:17 frame ruby#35: 0x000055af5f322c5b ruby`rb_imemo_new(type=imemo_env, v1=0x000055af657d88a0, v2=0x000055af657d8890, v3=0x0000000000000000, v0=0x00007f7d5b9d19c8) at gc.c:2434:12 frame ruby#36: 0x000055af5f5a3925 ruby`vm_env_new(env_ep=0x000055af657d88a0, env_body=0x000055af657d8890, env_size=4, iseq=0x00007f7d5b9d19c8) at vm_core.h:1363:33 frame ruby#37: 0x000055af5f5a3808 ruby`vm_make_env_each(ec=0x000055af60b2b700, cfp=0x00007f7d6482fc90) at vm.c:801:11 frame ruby#38: 0x000055af5f5a368d ruby`vm_make_env_each(ec=0x000055af60b2b700, cfp=0x00007f7d6482fc20) at vm.c:752:13 frame ruby#39: 0x000055af5f5a368d ruby`vm_make_env_each(ec=0x000055af60b2b700, cfp=0x00007f7d6482fbb0) at vm.c:752:13 (lldb) f 31 frame ruby#31: 0x000055af5f3342df ruby`newobj_slowpath_wb_protected [inlined] newobj_slowpath(klass=0x00007f7d5b9d19c8, flags=0x000000000000001a, objspace=0x000055af60b2b040, cr=0x000055af60b2b910, wb_protected=1) at gc.c:2284:9 2281 } 2282 GC_ASSERT(obj != 0); 2283 newobj_init(klass, flags, wb_protected, objspace, obj); -> 2284 gc_event_hook_prep(objspace, RUBY_INTERNAL_EVENT_NEWOBJ, obj, newobj_fill(obj, 0, 0, 0)); 2285 } 2286 RB_VM_LOCK_LEAVE_CR_LEV(cr, &lev); 2287 (lldb) p obj (VALUE) $3 = 0x00007f7d5b513fd0 (lldb) f 6 frame #6: 0x000055af5f339b0a ruby`gc_ref_update_imemo(objspace=0x000055af60b2b040, obj=0x00007f7d5b513fd0) at gc.c:9046:13 9043 { 9044 rb_env_t *env = (rb_env_t *)obj; 9045 TYPED_UPDATE_IF_MOVED(objspace, rb_iseq_t *, env->iseq); -> 9046 UPDATE_IF_MOVED(objspace, env->ep[VM_ENV_DATA_INDEX_ENV]); 9047 gc_update_values(objspace, (long)env->env_size, (VALUE *)env->env); 9048 } 9049 break; (lldb) p obj (VALUE) $4 = 0x00007f7d5b513fd0 (lldb) ```

Partially implements #10. ruby/net-imap@c2408aac9a

Partially implements #10. ruby/net-imap@746757b936

Partially implements #10. ruby/net-imap@24e929fdd2

…ding Partially implements #10. ruby/net-imap@0d43c5e856

Partially implements #10. ruby/net-imap@2a9afa83bf

Partially implements #10. ruby/net-imap@64d1080d63

* Implement eager versioning. Refactor versioning logic. * Add --version-limit and --greedy-versioning command-line args

[Bug #19793] Dummy frames are created at the top level when requiring another file. While requiring a file, it will try to convert using encodings. Some of these encodings will not respond to to_str. If method_missing is redefined on Object, then it will call method_missing and attempt raise an error. However, the iseq is invalid as it's a dummy frame so it will write an invalid iseq to the created NoMethodError. The following script crashes: ``` GC.stress = true class Object public :method_missing end File.write("/tmp/empty.rb", "") require "/tmp/empty.rb" ``` With the following backtrace: ``` frame #0: 0x00000001000fa8b8 miniruby`RVALUE_MARKED(obj=4308637824) at gc.c:1638:12 frame #1: 0x00000001000fb440 miniruby`RVALUE_BLACK_P(obj=4308637824) at gc.c:1763:12 frame #2: 0x00000001000facdc miniruby`gc_writebarrier_incremental(a=4308637824, b=4308332208, objspace=0x000000010180b000) at gc.c:8822:9 frame #3: 0x00000001000faad8 miniruby`rb_gc_writebarrier(a=4308637824, b=4308332208) at gc.c:8864:17 frame #4: 0x000000010016aff0 miniruby`rb_obj_written(a=4308637824, oldv=36, b=4308332208, filename="../iseq.c", line=1279) at gc.h:804:9 frame #5: 0x0000000100162a60 miniruby`rb_obj_write(a=4308637824, slot=0x0000000100d09888, b=4308332208, filename="../iseq.c", line=1279) at gc.h:837:5 frame #6: 0x0000000100165b0c miniruby`iseqw_new(iseq=0x0000000100d09880) at iseq.c:1279:9 frame #7: 0x0000000100165a64 miniruby`rb_iseqw_new(iseq=0x0000000100d09880) at iseq.c:1289:12 frame #8: 0x00000001000d8324 miniruby`name_err_init_attr(exc=4309777920, recv=4304780496, method=827660) at error.c:1830:35 frame #9: 0x00000001000d1b80 miniruby`name_err_init(exc=4309777920, mesg=4308332496, recv=4304780496, method=827660) at error.c:1869:12 frame #10: 0x00000001000d1bd4 miniruby`rb_nomethod_err_new(mesg=4308332496, recv=4304780496, method=827660, args=4308332448, priv=0) at error.c:1957:5 frame #11: 0x000000010039049c miniruby`rb_make_no_method_exception(exc=4304914512, format=4308332496, obj=4304780496, argc=1, argv=0x000000016fdfab00, priv=0) at vm_eval.c:959:16 frame #12: 0x00000001003b3274 miniruby`raise_method_missing(ec=0x0000000100b06f40, argc=1, argv=0x000000016fdfab00, obj=4304780496, last_call_status=MISSING_NOENTRY) at vm_eval.c:999:15 frame #13: 0x00000001003945d4 miniruby`rb_method_missing(argc=1, argv=0x000000016fdfab00, obj=4304780496) at vm_eval.c:944:5 ... frame ruby#23: 0x000000010038f5e4 miniruby`rb_vm_call_kw(ec=0x0000000100b06f40, recv=4304780496, id=2865, argc=1, argv=0x000000016fdfab00, me=0x0000000100cbfcf0, kw_splat=0) at vm_eval.c:326:12 frame ruby#24: 0x00000001003c18e4 miniruby`call_method_entry(ec=0x0000000100b06f40, defined_class=4304927952, obj=4304780496, id=2865, cme=0x0000000100cbfcf0, argc=1, argv=0x000000016fdfab00, kw_splat=0) at vm_method.c:2720:20 frame ruby#25: 0x00000001003c440c miniruby`check_funcall_exec(v=6171896792) at vm_eval.c:589:12 frame ruby#26: 0x00000001000dec00 miniruby`rb_vrescue2(b_proc=(miniruby`check_funcall_exec at vm_eval.c:587), data1=6171896792, r_proc=(miniruby`check_funcall_failed at vm_eval.c:596), data2=6171896792, args="Pȗ") at eval.c:919:18 frame ruby#27: 0x00000001000deab0 miniruby`rb_rescue2(b_proc=(miniruby`check_funcall_exec at vm_eval.c:587), data1=6171896792, r_proc=(miniruby`check_funcall_failed at vm_eval.c:596), data2=6171896792) at eval.c:900:17 frame ruby#28: 0x000000010039008c miniruby`check_funcall_missing(ec=0x0000000100b06f40, klass=4304923536, recv=4304780496, mid=3233, argc=0, argv=0x0000000000000000, respond=-1, def=36, kw_splat=0) at vm_eval.c:666:15 frame ruby#29: 0x000000010038fa60 miniruby`rb_check_funcall_default_kw(recv=4304780496, mid=3233, argc=0, argv=0x0000000000000000, def=36, kw_splat=0) at vm_eval.c:703:21 frame ruby#30: 0x000000010038fb04 miniruby`rb_check_funcall(recv=4304780496, mid=3233, argc=0, argv=0x0000000000000000) at vm_eval.c:685:12 frame ruby#31: 0x00000001001c469c miniruby`convert_type_with_id(val=4304780496, tname="String", method=3233, raise=0, index=-1) at object.c:3061:15 frame ruby#32: 0x00000001001c4a4c miniruby`rb_check_convert_type_with_id(val=4304780496, type=5, tname="String", method=3233) at object.c:3153:9 frame ruby#33: 0x00000001002d59f8 miniruby`rb_check_string_type(str=4304780496) at string.c:2571:11 frame ruby#34: 0x000000010014b7b0 miniruby`io_encoding_set(fptr=0x0000000100d09ca0, v1=4304780496, v2=4, opt=4) at io.c:11655:19 frame ruby#35: 0x0000000100139a58 miniruby`rb_io_set_encoding(argc=1, argv=0x000000016fdfb450, io=4308334032) at io.c:13497:5 frame ruby#36: 0x00000001003c0004 miniruby`ractor_safe_call_cfunc_m1(recv=4308334032, argc=1, argv=0x000000016fdfb450, func=(miniruby`rb_io_set_encoding at io.c:13487)) at vm_insnhelper.c:3271:12 ... frame ruby#43: 0x0000000100390b08 miniruby`rb_funcall(recv=4308334032, mid=16593, n=1) at vm_eval.c:1137:12 frame ruby#44: 0x00000001002a43d8 miniruby`load_file_internal(argp_v=6171899936) at ruby.c:2500:5 ... ```

matzbot and others added 30 commits July 26, 2010 00:51

* 2010-07-26

6ea7d67

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@28753 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

* configure.in: define BROKEN_CLOSE on FreeBSD.

afd65e3

This fixes build failure on MSVC. [ruby-core:31481] * include/ruby/ruby.h, include/ruby/missing.h: use BROKEN_CLOSE for replacing close(2). git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@28754 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

* vm.c (rb_thread_mark): should mark iseq itself other than normal

85ac32e

iseq. [ruby-dev:41880] git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@28755 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

* configure.in: define BROKEN_CLOSE only on FreeBSD.

6e09367

This needs to merge to 1.9.2. git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@28756 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

* include/ruby/missing.h: revert a part of r28727. config.h is expected

dde84bb

to include only once, before including defines.h. including it here breaks some macro definitions. git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@28757 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

* configure.in (XCFLAGS): missing.h needs config.h.

18d70b4

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@28758 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

* configure.in (config.h): add include guard.

1411ae2

* win32/Makefile.sub, bcc32/Makefile.sub (config.h): ditto. git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@28759 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

* ext/pathname/pathname.c (path_taint): Pathname#taint translated from

f663226

pathname.rb. git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@28760 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

* compile.c (rb_iseq_translate_threaded_code): removed duplicated code.

191f12b

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@28761 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

* class.c, compile.c, dir.c, file.c, iseq.c, parse.y, random.c:

b6b5bc2

clean unused-value warnings. * cont.c, process.c, vm_exec.h: clean cast warnings. git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@28762 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

* numeric.c (flo_cmp): typo.

590792f

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@28763 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

* defines.h, intern.h, missing.h, ruby.h, st.h, util.h: include

81ee977

config.h and defines.h for autoconf macros. git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@28764 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

* lib/mkmf.rb (have_framework): added.

f2995a9

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@28765 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

* Makefile.in (MINIRUBY): get rid of appending spaces for each

b6208f9

reconfigure. git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@28766 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

* ext/pathname/pathname.c (path_taint): use rb_obj_taint.

bc70437

(path_untaint): Pathname#untaint translated from pathname.rb. git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@28767 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

* cont.c: (RB_PAGE_SIZE): renamed from PAGE_SIZE. [ruby-dev:41870]

e10ea4d

* cont.c: (RB_PAGE_MASK): renamed from PAGE_MASK. git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@28768 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

* 2010-07-28

e2d1620

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@28769 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

* cont.c: typos.

708e3ae

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@28770 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

* missing/*.c: include missing.h

6dfae13

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@28771 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

* vm_core.h (rb_thread_check_trap_pending): hidden API for tcl/tk wra…

449952b

…pper. git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@28774 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

add a test.

2f23b76

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@28775 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

* ext/pathname/pathname.c (path_eq): Pathname#{==,===,eql?} translated

cb38c20

from pathname.rb. git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@28776 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

* configure.in: not [freebsd] but [freebsd*] for AS_CASE.

e4d048c

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@28777 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

* 2010-07-29

8651a00

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@28778 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

* file.c (rb_file_s_basename): pass baselen to rmext.

dfbd7e8

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@28779 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

* common.mk (EXT_SRCS): add ext/json/parser/parser.c.

0704576

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@28780 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

* ext/pathname/pathname.c (path_cmp): Pathname#<=> translated

c92e2d6

from pathname.rb. git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@28783 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

class description document moved.

07cba3d

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@28789 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

* 2010-07-30

8ab28f7

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@28790 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

shyouhei force-pushed the trunk branch 2 times, most recently from 4de2517 to 782ee5e Compare November 29, 2018 04:11

shyouhei force-pushed the trunk branch from 782ee5e to fd675a7 Compare December 14, 2018 04:31

shyouhei force-pushed the trunk branch 2 times, most recently from 5cd0c6a to da4f832 Compare January 25, 2019 13:48

shyouhei closed this Feb 12, 2019

shyouhei pushed a commit that referenced this pull request May 6, 2021

[ruby/net-imap] move ResponseParser to lib/net/imap/response_parser

395a287

Partially implements #10. ruby/net-imap@c2408aac9a

shyouhei pushed a commit that referenced this pull request May 6, 2021

[ruby/net-imap] move response data structs to net/imap/response_data

affb510

Partially implements #10. ruby/net-imap@746757b936

shyouhei pushed a commit that referenced this pull request May 6, 2021

[ruby/net-imap] move command data formatters to net/imap/command_data

4dc7b82

Partially implements #10. ruby/net-imap@24e929fdd2

shyouhei pushed a commit that referenced this pull request May 6, 2021

[ruby/net-imap] Move UTF7 & datetime formatting to net/imap/data_enco…

337c0e3

…ding Partially implements #10. ruby/net-imap@0d43c5e856

shyouhei pushed a commit that referenced this pull request May 6, 2021

[ruby/net-imap] Move flags to net/imap/flags

deae61e

Partially implements #10. ruby/net-imap@2a9afa83bf

shyouhei pushed a commit that referenced this pull request May 6, 2021

[ruby/net-imap] Move send_*_data into net/imap/command_data

b0de2e7

Partially implements #10. ruby/net-imap@64d1080d63

shyouhei pushed a commit that referenced this pull request Oct 22, 2021

Implement greedy versioning. Refactor versioning logic. (#10)

96f4f91

* Implement eager versioning. Refactor versioning logic. * Add --version-limit and --greedy-versioning command-line args

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