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Segmentation fault in when marking Array children in incremental GC #1325

Closed
lopopolo opened this issue Aug 14, 2021 · 3 comments · Fixed by #1343
Closed

Segmentation fault in when marking Array children in incremental GC #1325

lopopolo opened this issue Aug 14, 2021 · 3 comments · Fixed by #1343
Labels
A-security Area: Security vulnerabilities and unsoundness issues. A-vm Area: Interpreter VM implementations. B-mruby Backend: Implementation of artichoke-core using mruby. E-hard Call for participation: Experience needed to fix: Hard / a lot. E-help-wanted Call for participation: Help is requested to fix this issue.

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@lopopolo
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lopopolo commented Aug 14, 2021 •
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Crash report from Console.app:

Process:               spec-runner [8843]
Path:                  /Users/USER/*/spec-runner
Identifier:            spec-runner
Version:               0
Code Type:             X86-64 (Native)
Parent Process:        bash [51125]
Responsible:           iTerm2 [1278]
User ID:               501

Date/Time:             2021-08-14 07:07:40.213 -0700
OS Version:            macOS 11.5.2 (20G95)
Report Version:        12
Bridge OS Version:     5.5 (18P4759a)
Anonymous UUID:        E11EC264-CE69-D6A7-7C4F-F32DEBF9DEDF

Sleep/Wake UUID:       3D0AAD01-1CE4-43B5-827B-7FBEF23E2D96

Time Awake Since Boot: 60000 seconds
Time Since Wake:       700 seconds

System Integrity Protection: enabled

Crashed Thread:        0  Dispatch queue: com.apple.main-thread

Exception Type:        EXC_BAD_ACCESS (SIGSEGV)
Exception Codes:       KERN_INVALID_ADDRESS at 0x00007fbe0000179b
Exception Note:        EXC_CORPSE_NOTIFY

Termination Signal:    Segmentation fault: 11
Termination Reason:    Namespace SIGNAL, Code 0xb
Terminating Process:   exc handler [8843]

VM Regions Near 0x7fbe0000179b:
    __LINKEDIT                  1040cc000-1040d0000    [   16K] r--/r-- SM=NUL  /usr/lib/dyld
--> 
    MALLOC_SMALL             7fbe29800000-7fbe2a000000 [ 8192K] rw-/rwx SM=PRV  

Thread 0 Crashed:: Dispatch queue: com.apple.main-thread
0   spec-runner                   	0x000000010070f6cc gc_mark_children + 652
1   spec-runner                   	0x000000010070ebeb incremental_marking_phase + 123
2   spec-runner                   	0x000000010070e833 incremental_gc + 163
3   spec-runner                   	0x000000010070da9e incremental_gc_step + 78
4   spec-runner                   	0x000000010070d75e mrb_incremental_gc + 158
5   spec-runner                   	0x000000010070d12d mrb_obj_alloc + 349
6   spec-runner                   	0x0000000100710b91 mrb_env_new + 49
7   spec-runner                   	0x0000000100710d83 closure_setup + 211
8   spec-runner                   	0x0000000100710c9e mrb_closure_new + 46
9   spec-runner                   	0x0000000100720d69 mrb_vm_exec + 45705
10  spec-runner                   	0x0000000100715a27 mrb_vm_run + 247
11  spec-runner                   	0x0000000100723158 mrb_top_run + 264
12  spec-runner                   	0x00000001007608d9 mrb_load_exec + 1625
13  spec-runner                   	0x0000000100760ba4 mrb_load_nstring_cxt + 68
14  spec-runner                   	0x0000000100661c49 _$LT$artichoke_backend..sys..protect..Eval$u20$as$u20$artichoke_backend..sys..protect..Protect$GT$::run::hcafae0e44870a3e4 + 265
15  spec-runner                   	0x000000010074a37a mrb_protect + 138
16  spec-runner                   	0x000000010068ba87 artichoke_backend::sys::protect::protect::h944a0e1ab39dec6a + 311
17  spec-runner                   	0x000000010066173c artichoke_backend::sys::protect::eval::hbd8c6b34180748ed + 76
18  spec-runner                   	0x000000010065a1c8 artichoke_backend::eval::_$LT$impl$u20$artichoke_core..eval..Eval$u20$for$u20$artichoke_backend..artichoke..Artichoke$GT$::eval::_$u7b$$u7b$closure$u7d$$u7d$::hce01a01ed58c343b + 56
19  spec-runner                   	0x000000010062cb53 artichoke_backend::artichoke::Artichoke::with_ffi_boundary::h463a7f35af276fcf + 483
20  spec-runner                   	0x0000000100519521 artichoke_backend::eval::_$LT$impl$u20$artichoke_core..eval..Eval$u20$for$u20$artichoke_backend..artichoke..Artichoke$GT$::eval::h43f99761b44b9f21 + 593
21  spec-runner                   	0x0000000100650e24 artichoke_backend::load::_$LT$impl$u20$artichoke_core..load..LoadSources$u20$for$u20$artichoke_backend..artichoke..Artichoke$GT$::load_source::h44a50646940adfd7 + 2068
22  spec-runner                   	0x0000000100656468 artichoke_backend::extn::core::kernel::require::load::h551407a69a56b720 + 2312
23  spec-runner                   	0x0000000100603f35 artichoke_backend::extn::core::kernel::trampoline::load::h27a439160320c99b + 117
24  spec-runner                   	0x00000001005efc65 artichoke_backend::extn::core::kernel::mruby::artichoke_kernel_load::hfe2999a4479e2153 + 1493
25  spec-runner                   	0x0000000100718c3b mrb_vm_exec + 12635
26  spec-runner                   	0x0000000100715a27 mrb_vm_run + 247
27  spec-runner                   	0x00000001007149b0 mrb_run + 128
28  spec-runner                   	0x0000000100714320 mrb_funcall_with_block + 2048
29  spec-runner                   	0x00000001007137e8 mrb_funcall_argv + 120
30  spec-runner                   	0x0000000100661a8e _$LT$artichoke_backend..sys..protect..Funcall$u20$as$u20$artichoke_backend..sys..protect..Protect$GT$::run::h47920413fc272b19 + 606
31  spec-runner                   	0x000000010074a37a mrb_protect + 138
32  spec-runner                   	0x000000010068b7e1 artichoke_backend::sys::protect::protect::h296d21d4e1f2cfc2 + 305
33  spec-runner                   	0x00000001006616d2 artichoke_backend::sys::protect::funcall::h7dee28db2ef3f0ee + 274
34  spec-runner                   	0x00000001005c43c6 _$LT$artichoke_backend..value..Value$u20$as$u20$artichoke_core..value..Value$GT$::funcall::_$u7b$$u7b$closure$u7d$$u7d$::h19cae1e125fbe460 + 214
35  spec-runner                   	0x000000010063af9f artichoke_backend::artichoke::Artichoke::with_ffi_boundary::hd51b6ef77da57aed + 511
36  spec-runner                   	0x0000000100666e71 _$LT$artichoke_backend..value..Value$u20$as$u20$artichoke_core..value..Value$GT$::funcall::hed4cf29a5dcf647e + 1425
37  spec-runner                   	0x000000010038d32f spec_runner::mspec::run::hc5144b9662071e98 + 1631 (mspec.rs:92)
38  spec-runner                   	0x000000010039f583 spec_runner::try_main::hc170768dbb9ddc6c + 3315 (main.rs:215)
39  spec-runner                   	0x00000001003b5980 spec_runner::main::heeee51c15b4b9af2 + 1840 (main.rs:160)
40  spec-runner                   	0x000000010035507e core::ops::function::FnOnce::call_once::h0e2ea69c5982cd7e + 14 (function.rs:227)
41  spec-runner                   	0x0000000100353761 std::sys_common::backtrace::__rust_begin_short_backtrace::h520380e3a7549692 + 17 (backtrace.rs:125)
42  spec-runner                   	0x000000010035ceb4 std::rt::lang_start::_$u7b$$u7b$closure$u7d$$u7d$::h5446d204a69a47a0 + 20 (rt.rs:63)
43  spec-runner                   	0x0000000100a10fa9 std::rt::lang_start_internal::h89c9a0e84eca73a6 + 649
44  spec-runner                   	0x000000010035ce7e std::rt::lang_start::h249dca6b3bada386 + 46 (rt.rs:62)
45  spec-runner                   	0x00000001003b6206 main + 22
46  libdyld.dylib                 	0x00007fff2052af3d start + 1

Thread 0 crashed with X86 Thread State (64-bit):
  rax: 0x00007fbe00001793  rbx: 0x0000000000000001  rcx: 0x0000000000000000  rdx: 0x000000010070f682
  rdi: 0x00007fbe8a80c000  rsi: 0x0000000000000000  rbp: 0x00007ffeef8a6c70  rsp: 0x00007ffeef8a6be0
   r8: 0x0000000000000000   r9: 0x00007fbe8000eff0  r10: 0x00000000fffeffff  r11: 0x00007fbd7f638998
  r12: 0x00007ffeef0b2000  r13: 0x000000010408fe00  r14: 0x00007ffeef0b1000  r15: 0x00007ffeef8b0530
  rip: 0x000000010070f6cc  rfl: 0x0000000000010206  cr2: 0x00007fbe0000179b
  
Logical CPU:     4
Error Code:      0x00000004 (no mapping for user data read)
Trap Number:     14

Thread 0 instruction stream:
  0d 00 00 00 48 8b 7d f8-48 8b 75 b0 e8 13 fa ff  ....H.}.H.u.....
  ff e9 52 01 00 00 48 8b-45 e8 48 89 45 a8 48 8b  ..R...H.E.H.E.H.
  45 a8 48 8b 40 18 48 89-45 98 48 8b 45 a8 48 8b  E.H.@.H.E.H.E.H.
  40 28 48 89 45 90 48 c7-45 a0 00 00 00 00 48 8b  @(H.E.H.E.....H.
  45 a0 48 3b 45 98 0f 83-59 00 00 00 e9 00 00 00  E.H;E...Y.......
  00 48 8b 45 90 48 8b 4d-a0 48 c1 e1 04 48 01 c8  .H.E.H.M.H...H..
 [83]78 08 07 0f 82 1e 00-00 00 48 8b 7d f8 48 8b  .x........H.}.H.	<==
  45 90 48 8b 4d a0 48 c1-e1 04 48 01 c8 48 8b 00  E.H.M.H...H..H..
  48 89 c6 e8 5c e2 ff ff-e9 00 00 00 00 e9 00 00  H...\...........
  00 00 48 8b 45 a0 48 05-01 00 00 00 48 89 45 a0  ..H.E.H.....H.E.
  e9 99 ff ff ff e9 be 00-00 00 48 8b 7d f8 48 8b  ..........H.}.H.
  45 e8 48 89 c6 e8 da 11-04 00 48 8b 7d f8 48 8b  E.H.......H.}.H.
  
Thread 0 last branch register state not available.


Binary Images:
       0x10034f000 -        0x100b8afff +spec-runner (0) <26CA91C4-BF8E-3F9C-A380-FBEAF71BE6D8> /Users/USER/*/spec-runner
       0x103fb8000 -        0x104053fff  dyld (852.2) <57DB2053-BFD5-3683-97C6-F1DB2A1F1D09> /usr/lib/dyld
    0x7fff20247000 -     0x7fff20248fff  libsystem_blocks.dylib (79) <C05B8BD3-ADF0-37BD-BF53-664D03226FD9> /usr/lib/system/libsystem_blocks.dylib
    0x7fff20249000 -     0x7fff2027efff  libxpc.dylib (2038.120.1) <D3D34FC5-2269-399E-A637-4D33E6BAFC64> /usr/lib/system/libxpc.dylib
    0x7fff2027f000 -     0x7fff20296fff  libsystem_trace.dylib (1277.120.1) <5B36BE08-BABA-3F2F-934B-B3FFD10A07A3> /usr/lib/system/libsystem_trace.dylib
    0x7fff20297000 -     0x7fff20334fff  libcorecrypto.dylib (1000.140.4) <75692EFA-23F5-381B-A2BB-A8C8B78FCFAA> /usr/lib/system/libcorecrypto.dylib
    0x7fff20335000 -     0x7fff20361fff  libsystem_malloc.dylib (317.140.5) <0AEDABF0-CFF7-3304-9FF8-EB3BBF0801E6> /usr/lib/system/libsystem_malloc.dylib
    0x7fff20362000 -     0x7fff203a6fff  libdispatch.dylib (1271.120.2) <B0C73267-1BD9-3BEF-97CC-3B3D295FA58A> /usr/lib/system/libdispatch.dylib
    0x7fff203a7000 -     0x7fff203e0fff  libobjc.A.dylib (824) <551C4322-3921-3703-8CC6-1E8E143BB474> /usr/lib/libobjc.A.dylib
    0x7fff203e1000 -     0x7fff203e3fff  libsystem_featureflags.dylib (28.60.1) <45D158F7-C4E4-3BDE-A218-AD346686E7AB> /usr/lib/system/libsystem_featureflags.dylib
    0x7fff203e4000 -     0x7fff2046cfff  libsystem_c.dylib (1439.141.1) <337F746F-8232-3439-BBFF-BAB9C10731F4> /usr/lib/system/libsystem_c.dylib
    0x7fff2046d000 -     0x7fff204c2fff  libc++.1.dylib (905.6) <F4EC1A92-1DFC-3228-9868-5377EB375100> /usr/lib/libc++.1.dylib
    0x7fff204c3000 -     0x7fff204d8fff  libc++abi.dylib (905.6) <2F9B5E97-FD54-342A-8233-A5ECCD949F81> /usr/lib/libc++abi.dylib
    0x7fff204d9000 -     0x7fff20508fff  libsystem_kernel.dylib (7195.141.2) <B51DEA59-1260-35C6-B7B6-AA6D8459ECEC> /usr/lib/system/libsystem_kernel.dylib
    0x7fff20509000 -     0x7fff20514fff  libsystem_pthread.dylib (454.120.2) <B1A74420-49E9-32FC-BFCB-E53550236A23> /usr/lib/system/libsystem_pthread.dylib
    0x7fff20515000 -     0x7fff20550fff  libdyld.dylib (852.2) <11007DE4-ABE1-3079-BF1C-4D0EADA884DD> /usr/lib/system/libdyld.dylib
    0x7fff20551000 -     0x7fff2055afff  libsystem_platform.dylib (254.80.2) <6F368391-D41B-3A7E-9992-6000FA985F21> /usr/lib/system/libsystem_platform.dylib
    0x7fff2055b000 -     0x7fff20586fff  libsystem_info.dylib (542.40.3) <3965B574-34FA-3CF8-BB0B-FCEC7DA8C493> /usr/lib/system/libsystem_info.dylib
    0x7fff22956000 -     0x7fff2295ffff  libsystem_darwin.dylib (1439.141.1) <3D4F1678-BA4A-3318-8DD0-D391F3AB9986> /usr/lib/system/libsystem_darwin.dylib
    0x7fff22d75000 -     0x7fff22d80fff  libsystem_notify.dylib (279.40.4) <1AE27156-89B5-3E4A-AB14-A77E91F93DC7> /usr/lib/system/libsystem_notify.dylib
    0x7fff24d0d000 -     0x7fff24d1bfff  libsystem_networkextension.dylib (1295.140.3) <8D9FA7DC-AE37-3C15-B730-B9E3CA879BA7> /usr/lib/system/libsystem_networkextension.dylib
    0x7fff24d7a000 -     0x7fff24d90fff  libsystem_asl.dylib (385) <9284A3C6-2AB1-3596-BD6C-0D19C7A0DD99> /usr/lib/system/libsystem_asl.dylib
    0x7fff26457000 -     0x7fff2645efff  libsystem_symptoms.dylib (1431.140.1) <D2EDA831-DD60-318D-B59E-60429F9BF82F> /usr/lib/system/libsystem_symptoms.dylib
    0x7fff28466000 -     0x7fff28476fff  libsystem_containermanager.dylib (318.100.4) <6A824A01-6B4C-30DA-907A-580FD51773B8> /usr/lib/system/libsystem_containermanager.dylib
    0x7fff2917a000 -     0x7fff2917dfff  libsystem_configuration.dylib (1109.140.1) <99C91EBA-ADE0-3904-8F9C-38B0E3830936> /usr/lib/system/libsystem_configuration.dylib
    0x7fff2917e000 -     0x7fff29182fff  libsystem_sandbox.dylib (1441.141.1) <AF683466-5935-369E-A915-006F13CDAD99> /usr/lib/system/libsystem_sandbox.dylib
    0x7fff29e74000 -     0x7fff29e76fff  libquarantine.dylib (119.40.2) <C34FBC7A-963B-3F1D-BBC1-D3C6BB46E14B> /usr/lib/system/libquarantine.dylib
    0x7fff2a41f000 -     0x7fff2a423fff  libsystem_coreservices.dylib (127.1) <8F154612-D3F5-3DEB-AF88-48247ABF988E> /usr/lib/system/libsystem_coreservices.dylib
    0x7fff2a633000 -     0x7fff2a67afff  libsystem_m.dylib (3186.100.3) <46DC091D-F61F-3D16-A417-51C5D4D6912E> /usr/lib/system/libsystem_m.dylib
    0x7fff2a67b000 -     0x7fff2a67bfff  libcharset.1.dylib (59) <DCF853C3-4E07-3298-96A6-A759CB51D828> /usr/lib/libcharset.1.dylib
    0x7fff2a67c000 -     0x7fff2a681fff  libmacho.dylib (980) <2696D4F7-BF83-304F-BDED-9CC268B5FE4E> /usr/lib/system/libmacho.dylib
    0x7fff2a69e000 -     0x7fff2a6a9fff  libcommonCrypto.dylib (60178.120.3) <79B2C85C-C388-3AFF-B47C-DF0EE43FD292> /usr/lib/system/libcommonCrypto.dylib
    0x7fff2a6aa000 -     0x7fff2a6b4fff  libunwind.dylib (201) <072F009A-A981-308F-BEC5-06D58CA30BCF> /usr/lib/system/libunwind.dylib
    0x7fff2a6b5000 -     0x7fff2a6bcfff  liboah.dylib (203.58) <A7FFAFB5-B0AB-312E-8EB6-FAF56D76FB7D> /usr/lib/liboah.dylib
    0x7fff2a6bd000 -     0x7fff2a6c7fff  libcopyfile.dylib (173.40.2) <569E5E4E-73BE-3C12-818F-713DA0591E1D> /usr/lib/system/libcopyfile.dylib
    0x7fff2a6c8000 -     0x7fff2a6cffff  libcompiler_rt.dylib (102.2) <396ECEB9-331A-3100-8FA3-BFF3CFC760D6> /usr/lib/system/libcompiler_rt.dylib
    0x7fff2a6d0000 -     0x7fff2a6d2fff  libsystem_collections.dylib (1439.141.1) <AC793F4A-A519-33D5-AE4B-8F903A7B9551> /usr/lib/system/libsystem_collections.dylib
    0x7fff2a6d3000 -     0x7fff2a6d5fff  libsystem_secinit.dylib (87.60.1) <FB875594-4026-3AFB-AF61-BCD1A67478CC> /usr/lib/system/libsystem_secinit.dylib
    0x7fff2a6d6000 -     0x7fff2a6d8fff  libremovefile.dylib (49.120.1) <9646E2E1-71D1-3463-A556-8CD96059A4A9> /usr/lib/system/libremovefile.dylib
    0x7fff2a6d9000 -     0x7fff2a6d9fff  libkeymgr.dylib (31) <07EC6CD6-0DCC-321C-856B-65FF4327E963> /usr/lib/system/libkeymgr.dylib
    0x7fff2a6da000 -     0x7fff2a6e1fff  libsystem_dnssd.dylib (1310.140.1) <A6F00D58-D64A-35B5-8777-93FC2A690675> /usr/lib/system/libsystem_dnssd.dylib
    0x7fff2a6e2000 -     0x7fff2a6e7fff  libcache.dylib (83) <B92F6CCC-FF53-36B1-BBE0-F056080945D7> /usr/lib/system/libcache.dylib
    0x7fff2a6e8000 -     0x7fff2a6e9fff  libSystem.B.dylib (1292.120.1) <46BD4B87-AAC4-3070-BF8B-6BE393247BBE> /usr/lib/libSystem.B.dylib
    0x7fff2a727000 -     0x7fff2a817fff  libiconv.2.dylib (59) <CDC9F158-F290-38C7-A31D-F25991A2BCAB> /usr/lib/libiconv.2.dylib
    0x7fff2cf85000 -     0x7fff2cf9dfff  libresolv.9.dylib (68) <9EE291CF-A18A-3D09-A8CC-682AAF448176> /usr/lib/libresolv.9.dylib
    0x7fff2daf1000 -     0x7fff2daf1fff  liblaunch.dylib (2038.120.1) <CA5C47E3-5580-3C92-9603-9404291FAE58> /usr/lib/system/liblaunch.dylib
    0x7fff2ff88000 -     0x7fff2ff88fff  libsystem_product_info_filter.dylib (8.40.1) <C983DE00-5802-390A-9FEC-703E0E9A2114> /usr/lib/system/libsystem_product_info_filter.dylib

External Modification Summary:
  Calls made by other processes targeting this process:
    task_for_pid: 0
    thread_create: 0
    thread_set_state: 0
  Calls made by this process:
    task_for_pid: 0
    thread_create: 0
    thread_set_state: 0
  Calls made by all processes on this machine:
    task_for_pid: 7
    thread_create: 0
    thread_set_state: 27

VM Region Summary:
ReadOnly portion of Libraries: Total=524.3M resident=0K(0%) swapped_out_or_unallocated=524.3M(100%)
Writable regions: Total=1.1G written=0K(0%) resident=0K(0%) swapped_out=0K(0%) unallocated=1.1G(100%)
 
                                VIRTUAL   REGION 
REGION TYPE                        SIZE    COUNT (non-coalesced) 
===========                     =======  ======= 
Kernel Alloc Once                    8K        1 
MALLOC                           145.2M       39 
MALLOC guard page                   24K        5 
MALLOC_MEDIUM (reserved)         960.0M        8         reserved VM address space (unallocated)
Stack                             8188K        1 
Stack Guard                       56.0M        1 
VM_ALLOCATE                        144K        5 
__DATA                             456K       46 
__DATA_CONST                      1851K       37 
__DATA_DIRTY                        58K       22 
__LINKEDIT                       510.2M        4 
__OBJC_RO                         70.2M        1 
__OBJC_RW                         2496K        2 
__TEXT                            14.1M       47 
shared memory                        8K        2 
===========                     =======  ======= 
TOTAL                              1.7G      221 
TOTAL, minus reserved VM space   808.6M      221 


System Profile:
Network Service: Wi-Fi, AirPort, en0
Boot Volume File System Type: apfs
Memory Module: BANK 0/ChannelA-DIMM0, 32 GB, DDR4, 2667 MHz, Micron, -
Memory Module: BANK 2/ChannelB-DIMM0, 32 GB, DDR4, 2667 MHz, Micron, -
USB Device: USB 3.1 Bus
USB Device: Hub
USB Device: C922 Pro Stream Webcam
USB Device: Corsair ST100 USB 2.0 Hub
USB Device: Bose QC35 II
USB Device: Magic Keyboard with Numeric Keypad
USB Device: Corsair ST100 LED Driver
USB Device: Corsair ST100 Headset Outpu?t
USB Device: USB Controls
USB Device: Apple T2 Bus
USB Device: Composite Device
USB Device: Touch Bar Backlight
USB Device: Touch Bar Display
USB Device: Apple Internal Keyboard / Trackpad
USB Device: Headset
USB Device: Ambient Light Sensor
USB Device: FaceTime HD Camera (Built-in)
USB Device: Apple T2 Controller
Thunderbolt Bus: MacBook Pro, Apple Inc., 63.5
Thunderbolt Bus: MacBook Pro, Apple Inc., 63.5
Model: MacBookPro16,1, BootROM 1554.140.20.0.0 (iBridge: 18.16.14759.0.1,0), 8 processors, 8-Core Intel Core i9, 2.4 GHz, 64 GB, SMC 
Graphics: kHW_IntelUHDGraphics630Item, Intel UHD Graphics 630, spdisplays_builtin
Graphics: kHW_AMDRadeonPro5500MItem, AMD Radeon Pro 5500M, spdisplays_pcie_device, 8 GB
AirPort: spairport_wireless_card_type_airport_extreme (0x14E4, 0x7BF), wl0: Jul  7 2021 02:54:21 version 9.30.444.17.32.5.70 FWID 01-6551fb93
Bluetooth: Version 8.0.5d7, 3 services, 27 devices, 1 incoming serial ports

as of daf01d7 when running:

$ cargo +nightly build --release --bin spec-runner
$ ./target/release/spec-runner --format yaml all-core-specs.toml

This only appears in release mode. I think it also appears on stable.

$ cargo +nightly --version
cargo 1.56.0-nightly (b51439fd8 2021-08-09)
$ rustc +nightly --version
rustc 1.56.0-nightly (0fa319039 2021-08-12)
@lopopolo lopopolo added A-vm Area: Interpreter VM implementations. A-security Area: Security vulnerabilities and unsoundness issues. B-mruby Backend: Implementation of artichoke-core using mruby. labels Aug 14, 2021
lopopolo added a commit that referenced this issue Aug 17, 2021
@lopopolo
Push a GitHub Actions workflow to reproduce #1325 in CI
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@lopopolo lopopolo mentioned this issue Aug 17, 2021
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@lopopolo
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Here's another crash dump:

Process:               spec-runner [5659]
Path:                  /Users/USER/*/spec-runner
Identifier:            spec-runner
Version:               0
Code Type:             X86-64 (Native)
Parent Process:        bash [4682]
Responsible:           iTerm2 [3236]
User ID:               501

Date/Time:             2021-08-16 18:08:50.539 -0700
OS Version:            macOS 11.5.2 (20G95)
Report Version:        12
Bridge OS Version:     5.5 (18P4759a)
Anonymous UUID:        E11EC264-CE69-D6A7-7C4F-F32DEBF9DEDF

Sleep/Wake UUID:       A497ACC3-EEBC-4560-BFA8-F9CAE7D7D388

Time Awake Since Boot: 6900 seconds
Time Since Wake:       280 seconds

System Integrity Protection: enabled

Crashed Thread:        0  Dispatch queue: com.apple.main-thread

Exception Type:        EXC_BAD_ACCESS (SIGSEGV)
Exception Codes:       KERN_INVALID_ADDRESS at 0x00007fc50000179a
Exception Note:        EXC_CORPSE_NOTIFY

Termination Signal:    Segmentation fault: 11
Termination Reason:    Namespace SIGNAL, Code 0xb
Terminating Process:   exc handler [5659]

VM Regions Near 0x7fc50000179a:
    __LINKEDIT                  105922000-105926000    [   16K] r--/r-- SM=NUL  /usr/lib/dyld
--> 
    MALLOC_TINY              7fc580400000-7fc580500000 [ 1024K] rw-/rwx SM=PRV  

Thread 0 Crashed:: Dispatch queue: com.apple.main-thread
0   spec-runner                   	0x0000000101367f1d gc_mark_children + 381
1   spec-runner                   	0x0000000101367153 incremental_gc + 851
2   spec-runner                   	0x00000001013663c3 mrb_incremental_gc + 115
3   spec-runner                   	0x0000000101365c8b mrb_obj_alloc + 123
4   spec-runner                   	0x00000001012f020e range_ptr_init + 158
5   spec-runner                   	0x00000001012f0161 mrb_range_new + 33
6   spec-runner                   	0x0000000101333584 mrb_vm_exec + 59476
7   spec-runner                   	0x0000000101324cb0 mrb_vm_run + 256
8   spec-runner                   	0x000000010134d0fe mrb_load_exec + 1038
9   spec-runner                   	0x000000010136897d mrb_protect + 125
10  spec-runner                   	0x000000010124145e artichoke_backend::eval::_$LT$impl$u20$artichoke_core..eval..Eval$u20$for$u20$artichoke_backend..artichoke..Artichoke$GT$::eval::hfc06a0ae7a16353a + 238
11  spec-runner                   	0x0000000101244c46 artichoke_backend::load::_$LT$impl$u20$artichoke_core..load..LoadSources$u20$for$u20$artichoke_backend..artichoke..Artichoke$GT$::require_source::heb84a44ba2cc2317 + 534
12  spec-runner                   	0x000000010124e34d artichoke_backend::extn::core::kernel::require::require_relative::h2f663bc49913fdf9 + 1581
13  spec-runner                   	0x00000001012db494 artichoke_backend::extn::core::kernel::trampoline::require_relative::h7d8b09a2f030bfd1 + 100
14  spec-runner                   	0x00000001012a9859 artichoke_backend::extn::core::kernel::mruby::artichoke_kernel_require_relative::h8b503b202f3fb2b6 + 169
15  spec-runner                   	0x00000001013298d0 mrb_vm_exec + 19360
16  spec-runner                   	0x0000000101324cb0 mrb_vm_run + 256
17  spec-runner                   	0x000000010134d0fe mrb_load_exec + 1038
18  spec-runner                   	0x000000010136897d mrb_protect + 125
19  spec-runner                   	0x000000010124145e artichoke_backend::eval::_$LT$impl$u20$artichoke_core..eval..Eval$u20$for$u20$artichoke_backend..artichoke..Artichoke$GT$::eval::hfc06a0ae7a16353a + 238
20  spec-runner                   	0x00000001012442ce artichoke_backend::load::_$LT$impl$u20$artichoke_core..load..LoadSources$u20$for$u20$artichoke_backend..artichoke..Artichoke$GT$::load_source::hbfd290a918598381 + 558
21  spec-runner                   	0x000000010124d4cd artichoke_backend::extn::core::kernel::require::load::h358f45ffa2fc57ed + 1453
22  spec-runner                   	0x00000001012a8cdd artichoke_backend::extn::core::kernel::mruby::artichoke_kernel_load::h5fa2a618b4eaa3c0 + 157
23  spec-runner                   	0x00000001013298d0 mrb_vm_exec + 19360
24  spec-runner                   	0x0000000101324cb0 mrb_vm_run + 256
25  spec-runner                   	0x0000000101323d31 mrb_funcall_with_block + 1649
26  spec-runner                   	0x0000000101323527 mrb_funcall_argv + 39
27  spec-runner                   	0x000000010136897d mrb_protect + 125
28  spec-runner                   	0x0000000101232f82 artichoke_backend::artichoke::Artichoke::with_ffi_boundary::ha40864b47db5ad81 + 258
29  spec-runner                   	0x000000010126b228 _$LT$artichoke_backend..value..Value$u20$as$u20$artichoke_core..value..Value$GT$::funcall::h5828ee386bd16e5b + 1000
30  spec-runner                   	0x00000001011bf1a2 spec_runner::mspec::run::h9a0a1b5c2fc798b1 + 626
31  spec-runner                   	0x00000001011bb052 spec_runner::main::hd35927fb20517f7a + 4690
32  spec-runner                   	0x00000001011cf04a std::sys_common::backtrace::__rust_begin_short_backtrace::h56718d8442030527 + 10
33  spec-runner                   	0x00000001011cf06c std::rt::lang_start::_$u7b$$u7b$closure$u7d$$u7d$::hf1d4da23d29d5e92 + 12
34  spec-runner                   	0x000000010144a321 std::rt::lang_start_internal::h4428f22d05a79c62 + 641
35  spec-runner                   	0x00000001011bb4a9 main + 41
36  libdyld.dylib                 	0x00007fff204c0f3d start + 1

Thread 0 crashed with X86 Thread State (64-bit):
  rax: 0x0000000000000001  rbx: 0x00007fc5b8062dd0  rcx: 0x00007fc50000179a  rdx: 0x0000000101368110
  rdi: 0x00007fc5d100a000  rsi: 0x00007fc5b8062dd0  rbp: 0x00007ffeeeaf0e60  rsp: 0x00007ffeeeaf0e50
   r8: 0x00007fc5d81e8f00   r9: 0x0000000000000010  r10: 0x00007fc58045f420  r11: 0x000000008045cad0
  r12: 0x00000000000007d0  r13: 0x00000000000005f4  r14: 0x00007fc5d100a000  r15: 0x0000000101367a28
  rip: 0x0000000101367f1d  rfl: 0x0000000000010206  cr2: 0x00007fc50000179a
  
Logical CPU:     10
Error Code:      0x00000004 (no mapping for user data read)
Trap Number:     14

Thread 0 instruction stream:
  1b 81 e1 ff f8 ff ff 89-48 10 49 8b 8e f0 00 00  ........H.I.....
  00 48 89 48 08 49 89 86-f0 00 00 00 48 8b 43 28  .H.H.I......H.C(
  48 85 c0 0f 85 ea 01 00-00 e9 20 02 00 00 48 8b  H......... ...H.
  43 18 48 85 c0 0f 84 13-02 00 00 48 8b 4b 28 48  C.H........H.K(H
  83 c1 08 e9 18 00 00 00-66 2e 0f 1f 84 00 00 00  ........f.......
  00 00 90 48 83 c1 10 48-ff c8 0f 84 ee 01 00 00  ...H...H........
 [83]39 07 72 ee 48 8b 51-f8 48 85 d2 74 e5 8b 72  .9.r.H.Q.H..t..r	<==
  10 f7 c6 00 03 00 00 74-da 89 f7 81 e7 00 07 00  .......t........
  00 81 ff 00 07 00 00 74-ca 81 e6 ff f8 ff ff 89  .......t........
  72 10 49 8b b6 f0 00 00-00 48 89 72 08 49 89 96  r.I......H.r.I..
  f0 00 00 00 eb ad 4c 89-f7 48 89 de e8 02 9a f8  ......L..H......
  ff 4c 89 f7 48 89 de 5b-41 5e 5d e9 23 8b ff ff  .L..H..[A^].#...
  
Thread 0 last branch register state not available.


Binary Images:
       0x101106000 -        0x101c25fff +spec-runner (0) <64043C09-3D9C-392B-8503-496B9DA8EE29> /Users/USER/*/spec-runner
       0x10580e000 -        0x1058a9fff  dyld (852.2) <57DB2053-BFD5-3683-97C6-F1DB2A1F1D09> /usr/lib/dyld
    0x7fff201dd000 -     0x7fff201defff  libsystem_blocks.dylib (79) <C05B8BD3-ADF0-37BD-BF53-664D03226FD9> /usr/lib/system/libsystem_blocks.dylib
    0x7fff201df000 -     0x7fff20214fff  libxpc.dylib (2038.120.1) <D3D34FC5-2269-399E-A637-4D33E6BAFC64> /usr/lib/system/libxpc.dylib
    0x7fff20215000 -     0x7fff2022cfff  libsystem_trace.dylib (1277.120.1) <5B36BE08-BABA-3F2F-934B-B3FFD10A07A3> /usr/lib/system/libsystem_trace.dylib
    0x7fff2022d000 -     0x7fff202cafff  libcorecrypto.dylib (1000.140.4) <75692EFA-23F5-381B-A2BB-A8C8B78FCFAA> /usr/lib/system/libcorecrypto.dylib
    0x7fff202cb000 -     0x7fff202f7fff  libsystem_malloc.dylib (317.140.5) <0AEDABF0-CFF7-3304-9FF8-EB3BBF0801E6> /usr/lib/system/libsystem_malloc.dylib
    0x7fff202f8000 -     0x7fff2033cfff  libdispatch.dylib (1271.120.2) <B0C73267-1BD9-3BEF-97CC-3B3D295FA58A> /usr/lib/system/libdispatch.dylib
    0x7fff2033d000 -     0x7fff20376fff  libobjc.A.dylib (824) <551C4322-3921-3703-8CC6-1E8E143BB474> /usr/lib/libobjc.A.dylib
    0x7fff20377000 -     0x7fff20379fff  libsystem_featureflags.dylib (28.60.1) <45D158F7-C4E4-3BDE-A218-AD346686E7AB> /usr/lib/system/libsystem_featureflags.dylib
    0x7fff2037a000 -     0x7fff20402fff  libsystem_c.dylib (1439.141.1) <337F746F-8232-3439-BBFF-BAB9C10731F4> /usr/lib/system/libsystem_c.dylib
    0x7fff20403000 -     0x7fff20458fff  libc++.1.dylib (905.6) <F4EC1A92-1DFC-3228-9868-5377EB375100> /usr/lib/libc++.1.dylib
    0x7fff20459000 -     0x7fff2046efff  libc++abi.dylib (905.6) <2F9B5E97-FD54-342A-8233-A5ECCD949F81> /usr/lib/libc++abi.dylib
    0x7fff2046f000 -     0x7fff2049efff  libsystem_kernel.dylib (7195.141.2) <B51DEA59-1260-35C6-B7B6-AA6D8459ECEC> /usr/lib/system/libsystem_kernel.dylib
    0x7fff2049f000 -     0x7fff204aafff  libsystem_pthread.dylib (454.120.2) <B1A74420-49E9-32FC-BFCB-E53550236A23> /usr/lib/system/libsystem_pthread.dylib
    0x7fff204ab000 -     0x7fff204e6fff  libdyld.dylib (852.2) <11007DE4-ABE1-3079-BF1C-4D0EADA884DD> /usr/lib/system/libdyld.dylib
    0x7fff204e7000 -     0x7fff204f0fff  libsystem_platform.dylib (254.80.2) <6F368391-D41B-3A7E-9992-6000FA985F21> /usr/lib/system/libsystem_platform.dylib
    0x7fff204f1000 -     0x7fff2051cfff  libsystem_info.dylib (542.40.3) <3965B574-34FA-3CF8-BB0B-FCEC7DA8C493> /usr/lib/system/libsystem_info.dylib
    0x7fff228ec000 -     0x7fff228f5fff  libsystem_darwin.dylib (1439.141.1) <3D4F1678-BA4A-3318-8DD0-D391F3AB9986> /usr/lib/system/libsystem_darwin.dylib
    0x7fff22d0b000 -     0x7fff22d16fff  libsystem_notify.dylib (279.40.4) <1AE27156-89B5-3E4A-AB14-A77E91F93DC7> /usr/lib/system/libsystem_notify.dylib
    0x7fff24ca3000 -     0x7fff24cb1fff  libsystem_networkextension.dylib (1295.140.3) <8D9FA7DC-AE37-3C15-B730-B9E3CA879BA7> /usr/lib/system/libsystem_networkextension.dylib
    0x7fff24d10000 -     0x7fff24d26fff  libsystem_asl.dylib (385) <9284A3C6-2AB1-3596-BD6C-0D19C7A0DD99> /usr/lib/system/libsystem_asl.dylib
    0x7fff263ed000 -     0x7fff263f4fff  libsystem_symptoms.dylib (1431.140.1) <D2EDA831-DD60-318D-B59E-60429F9BF82F> /usr/lib/system/libsystem_symptoms.dylib
    0x7fff283fc000 -     0x7fff2840cfff  libsystem_containermanager.dylib (318.100.4) <6A824A01-6B4C-30DA-907A-580FD51773B8> /usr/lib/system/libsystem_containermanager.dylib
    0x7fff29110000 -     0x7fff29113fff  libsystem_configuration.dylib (1109.140.1) <99C91EBA-ADE0-3904-8F9C-38B0E3830936> /usr/lib/system/libsystem_configuration.dylib
    0x7fff29114000 -     0x7fff29118fff  libsystem_sandbox.dylib (1441.141.1) <AF683466-5935-369E-A915-006F13CDAD99> /usr/lib/system/libsystem_sandbox.dylib
    0x7fff29e0a000 -     0x7fff29e0cfff  libquarantine.dylib (119.40.2) <C34FBC7A-963B-3F1D-BBC1-D3C6BB46E14B> /usr/lib/system/libquarantine.dylib
    0x7fff2a3b5000 -     0x7fff2a3b9fff  libsystem_coreservices.dylib (127.1) <8F154612-D3F5-3DEB-AF88-48247ABF988E> /usr/lib/system/libsystem_coreservices.dylib
    0x7fff2a5c9000 -     0x7fff2a610fff  libsystem_m.dylib (3186.100.3) <46DC091D-F61F-3D16-A417-51C5D4D6912E> /usr/lib/system/libsystem_m.dylib
    0x7fff2a611000 -     0x7fff2a611fff  libcharset.1.dylib (59) <DCF853C3-4E07-3298-96A6-A759CB51D828> /usr/lib/libcharset.1.dylib
    0x7fff2a612000 -     0x7fff2a617fff  libmacho.dylib (980) <2696D4F7-BF83-304F-BDED-9CC268B5FE4E> /usr/lib/system/libmacho.dylib
    0x7fff2a634000 -     0x7fff2a63ffff  libcommonCrypto.dylib (60178.120.3) <79B2C85C-C388-3AFF-B47C-DF0EE43FD292> /usr/lib/system/libcommonCrypto.dylib
    0x7fff2a640000 -     0x7fff2a64afff  libunwind.dylib (201) <072F009A-A981-308F-BEC5-06D58CA30BCF> /usr/lib/system/libunwind.dylib
    0x7fff2a64b000 -     0x7fff2a652fff  liboah.dylib (203.58) <A7FFAFB5-B0AB-312E-8EB6-FAF56D76FB7D> /usr/lib/liboah.dylib
    0x7fff2a653000 -     0x7fff2a65dfff  libcopyfile.dylib (173.40.2) <569E5E4E-73BE-3C12-818F-713DA0591E1D> /usr/lib/system/libcopyfile.dylib
    0x7fff2a65e000 -     0x7fff2a665fff  libcompiler_rt.dylib (102.2) <396ECEB9-331A-3100-8FA3-BFF3CFC760D6> /usr/lib/system/libcompiler_rt.dylib
    0x7fff2a666000 -     0x7fff2a668fff  libsystem_collections.dylib (1439.141.1) <AC793F4A-A519-33D5-AE4B-8F903A7B9551> /usr/lib/system/libsystem_collections.dylib
    0x7fff2a669000 -     0x7fff2a66bfff  libsystem_secinit.dylib (87.60.1) <FB875594-4026-3AFB-AF61-BCD1A67478CC> /usr/lib/system/libsystem_secinit.dylib
    0x7fff2a66c000 -     0x7fff2a66efff  libremovefile.dylib (49.120.1) <9646E2E1-71D1-3463-A556-8CD96059A4A9> /usr/lib/system/libremovefile.dylib
    0x7fff2a66f000 -     0x7fff2a66ffff  libkeymgr.dylib (31) <07EC6CD6-0DCC-321C-856B-65FF4327E963> /usr/lib/system/libkeymgr.dylib
    0x7fff2a670000 -     0x7fff2a677fff  libsystem_dnssd.dylib (1310.140.1) <A6F00D58-D64A-35B5-8777-93FC2A690675> /usr/lib/system/libsystem_dnssd.dylib
    0x7fff2a678000 -     0x7fff2a67dfff  libcache.dylib (83) <B92F6CCC-FF53-36B1-BBE0-F056080945D7> /usr/lib/system/libcache.dylib
    0x7fff2a67e000 -     0x7fff2a67ffff  libSystem.B.dylib (1292.120.1) <46BD4B87-AAC4-3070-BF8B-6BE393247BBE> /usr/lib/libSystem.B.dylib
    0x7fff2a6bd000 -     0x7fff2a7adfff  libiconv.2.dylib (59) <CDC9F158-F290-38C7-A31D-F25991A2BCAB> /usr/lib/libiconv.2.dylib
    0x7fff2cf1b000 -     0x7fff2cf33fff  libresolv.9.dylib (68) <9EE291CF-A18A-3D09-A8CC-682AAF448176> /usr/lib/libresolv.9.dylib
    0x7fff2da87000 -     0x7fff2da87fff  liblaunch.dylib (2038.120.1) <CA5C47E3-5580-3C92-9603-9404291FAE58> /usr/lib/system/liblaunch.dylib
    0x7fff2ff1e000 -     0x7fff2ff1efff  libsystem_product_info_filter.dylib (8.40.1) <C983DE00-5802-390A-9FEC-703E0E9A2114> /usr/lib/system/libsystem_product_info_filter.dylib

External Modification Summary:
  Calls made by other processes targeting this process:
    task_for_pid: 0
    thread_create: 0
    thread_set_state: 0
  Calls made by this process:
    task_for_pid: 0
    thread_create: 0
    thread_set_state: 0
  Calls made by all processes on this machine:
    task_for_pid: 0
    thread_create: 0
    thread_set_state: 0

VM Region Summary:
ReadOnly portion of Libraries: Total=518.6M resident=0K(0%) swapped_out_or_unallocated=518.6M(100%)
Writable regions: Total=976.5M written=0K(0%) resident=0K(0%) swapped_out=0K(0%) unallocated=976.5M(100%)
 
                                VIRTUAL   REGION 
REGION TYPE                        SIZE    COUNT (non-coalesced) 
===========                     =======  ======= 
Kernel Alloc Once                    8K        1 
MALLOC                           128.2M       36 
MALLOC guard page                   24K        5 
MALLOC_MEDIUM (reserved)         840.0M        7         reserved VM address space (unallocated)
Stack                             8188K        1 
Stack Guard                       56.0M        1 
VM_ALLOCATE                        144K        5 
__DATA                             424K       46 
__DATA_CONST                      1867K       37 
__DATA_DIRTY                        58K       22 
__LINKEDIT                       501.5M        5 
__OBJC_RO                         70.2M        1 
__OBJC_RW                         2496K        2 
__TEXT                            17.0M       47 
shared memory                        8K        2 
===========                     =======  ======= 
TOTAL                              1.6G      218 
TOTAL, minus reserved VM space   785.9M      218

@lopopolo
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I've run this a bunch of times and the crashes don't happen at the same spot when running the same binary multiple times.

Process:               spec-runner [37802]
Path:                  /Users/USER/*/spec-runner
Identifier:            spec-runner
Version:               0
Code Type:             X86-64 (Native)
Parent Process:        bash [37431]
Responsible:           iTerm2 [37428]
User ID:               501

Date/Time:             2021-08-16 20:55:18.688 -0700
OS Version:            macOS 11.5.2 (20G95)
Report Version:        12
Bridge OS Version:     5.5 (18P4759a)
Anonymous UUID:        E11EC264-CE69-D6A7-7C4F-F32DEBF9DEDF

Sleep/Wake UUID:       2AB5C465-C9C8-45B8-82A3-E63A2290DC50

Time Awake Since Boot: 16000 seconds
Time Since Wake:       30 seconds

System Integrity Protection: enabled

Crashed Thread:        0  Dispatch queue: com.apple.main-thread

Exception Type:        EXC_BAD_ACCESS (SIGSEGV)
Exception Codes:       KERN_INVALID_ADDRESS at 0x00007fdd0000179a
Exception Note:        EXC_CORPSE_NOTIFY

Termination Signal:    Segmentation fault: 11
Termination Reason:    Namespace SIGNAL, Code 0xb
Terminating Process:   exc handler [37802]

VM Regions Near 0x7fdd0000179a:
    __LINKEDIT                  110799000-11079d000    [   16K] r--/r-- SM=NUL  /usr/lib/dyld
--> 
    MALLOC_TINY              7fddabc00000-7fddabd00000 [ 1024K] rw-/rwx SM=PRV  

Thread 0 Crashed:: Dispatch queue: com.apple.main-thread
0   spec-runner                   	0x000000010d73d35d gc_mark_children + 381
1   spec-runner                   	0x000000010d73c593 incremental_gc + 851
2   spec-runner                   	0x000000010d73b803 mrb_incremental_gc + 115
3   spec-runner                   	0x000000010d73b0cb mrb_obj_alloc + 123
4   spec-runner                   	0x000000010d742dbc str_new + 44
5   spec-runner                   	0x000000010d742d89 mrb_str_new + 9
6   spec-runner                   	0x000000010d76a614 mrb_vm_exec + 55460
7   spec-runner                   	0x000000010d75ccf0 mrb_vm_run + 256
8   spec-runner                   	0x000000010d7a145e mrb_load_exec + 1038
9   spec-runner                   	0x000000010d77a33d mrb_protect + 125
10  spec-runner                   	0x000000010d68ba4e artichoke_backend::eval::_$LT$impl$u20$artichoke_core..eval..Eval$u20$for$u20$artichoke_backend..artichoke..Artichoke$GT$::eval::hac35e810ecec8aa1 + 238
11  spec-runner                   	0x000000010d68ec46 artichoke_backend::load::_$LT$impl$u20$artichoke_core..load..LoadSources$u20$for$u20$artichoke_backend..artichoke..Artichoke$GT$::require_source::h28a15d09e1b54b60 + 534
12  spec-runner                   	0x000000010d698a3d artichoke_backend::extn::core::kernel::require::require_relative::h96be5ae40302c759 + 1581
13  spec-runner                   	0x000000010d726474 artichoke_backend::extn::core::kernel::trampoline::require_relative::heb33f0f1e4d527f2 + 100
14  spec-runner                   	0x000000010d6f4659 artichoke_backend::extn::core::kernel::mruby::artichoke_kernel_require_relative::hf90ef4a664bcf90c + 169
15  spec-runner                   	0x000000010d761910 mrb_vm_exec + 19360
16  spec-runner                   	0x000000010d75ccf0 mrb_vm_run + 256
17  spec-runner                   	0x000000010d7a145e mrb_load_exec + 1038
18  spec-runner                   	0x000000010d77a33d mrb_protect + 125
19  spec-runner                   	0x000000010d68ba4e artichoke_backend::eval::_$LT$impl$u20$artichoke_core..eval..Eval$u20$for$u20$artichoke_backend..artichoke..Artichoke$GT$::eval::hac35e810ecec8aa1 + 238
20  spec-runner                   	0x000000010d68e8be artichoke_backend::load::_$LT$impl$u20$artichoke_core..load..LoadSources$u20$for$u20$artichoke_backend..artichoke..Artichoke$GT$::load_source::h9ea506296ea604c7 + 558
21  spec-runner                   	0x000000010d697bbd artichoke_backend::extn::core::kernel::require::load::h491d6f08e68c8bbf + 1453
22  spec-runner                   	0x000000010d6f3add artichoke_backend::extn::core::kernel::mruby::artichoke_kernel_load::he9bbed2c25576279 + 157
23  spec-runner                   	0x000000010d761910 mrb_vm_exec + 19360
24  spec-runner                   	0x000000010d75ccf0 mrb_vm_run + 256
25  spec-runner                   	0x000000010d75bd71 mrb_funcall_with_block + 1649
26  spec-runner                   	0x000000010d75b567 mrb_funcall_argv + 39
27  spec-runner                   	0x000000010d77a33d mrb_protect + 125
28  spec-runner                   	0x000000010d67d572 artichoke_backend::artichoke::Artichoke::with_ffi_boundary::hce402f0b29429bc3 + 258
29  spec-runner                   	0x000000010d6b5e88 _$LT$artichoke_backend..value..Value$u20$as$u20$artichoke_core..value..Value$GT$::funcall::h64846a7101d5ea42 + 1000
30  spec-runner                   	0x000000010d6091e2 spec_runner::mspec::run::h2c7938e394cc01d7 + 626 (mspec.rs:92)
31  spec-runner                   	0x000000010d605282 spec_runner::try_main::h0cea417a0c7a6273 + 2609 (main.rs:215) [inlined]
32  spec-runner                   	0x000000010d605282 spec_runner::main::h0c05aaf15d13e44b + 4690 (main.rs:160)
33  spec-runner                   	0x000000010d61914a core::ops::function::FnOnce::call_once::hd6e23e3efb3747ca + 2 (function.rs:227) [inlined]
34  spec-runner                   	0x000000010d61914a std::sys_common::backtrace::__rust_begin_short_backtrace::he501278bd57a7322 + 10 (backtrace.rs:125)
35  spec-runner                   	0x000000010d61916c std::rt::lang_start::_$u7b$$u7b$closure$u7d$$u7d$::hbab6f1e7fea35939 + 12 (rt.rs:49)
36  spec-runner                   	0x000000010d895101 std::rt::lang_start_internal::h4428f22d05a79c62 + 641
37  spec-runner                   	0x000000010d6056d9 main + 41
38  libdyld.dylib                 	0x00007fff204c0f3d start + 1

Thread 0 crashed with X86 Thread State (64-bit):
  rax: 0x0000000000000001  rbx: 0x00007fde10172dd0  rcx: 0x00007fdd0000179a  rdx: 0x000000010d73d550
  rdi: 0x00007fde0c00b200  rsi: 0x00007fde10172dd0  rbp: 0x00007ffee26a9ea0  rsp: 0x00007ffee26a9e90
   r8: 0x00000000abda0990   r9: 0x00007fddfc016be8  r10: 0x0000000000000010  r11: 0x00007fde0bca85b0
  r12: 0x00000000000007d0  r13: 0x00000000000005f5  r14: 0x00007fde0c00b200  r15: 0x000000010d73ce68
  rip: 0x000000010d73d35d  rfl: 0x0000000000010206  cr2: 0x00007fdd0000179a
  
Logical CPU:     2
Error Code:      0x00000004 (no mapping for user data read)
Trap Number:     14

Thread 0 instruction stream:
  1b 81 e1 ff f8 ff ff 89-48 10 49 8b 8e f0 00 00  ........H.I.....
  00 48 89 48 08 49 89 86-f0 00 00 00 48 8b 43 28  .H.H.I......H.C(
  48 85 c0 0f 85 ea 01 00-00 e9 20 02 00 00 48 8b  H......... ...H.
  43 18 48 85 c0 0f 84 13-02 00 00 48 8b 4b 28 48  C.H........H.K(H
  83 c1 08 eb 1b 66 2e 0f-1f 84 00 00 00 00 00 0f  .....f..........
  1f 40 00 48 83 c1 10 48-ff c8 0f 84 ee 01 00 00  .@.H...H........
 [83]39 07 72 ee 48 8b 51-f8 48 85 d2 74 e5 8b 72  .9.r.H.Q.H..t..r	<==
  10 f7 c6 00 03 00 00 74-da 89 f7 81 e7 00 07 00  .......t........
  00 81 ff 00 07 00 00 74-ca 81 e6 ff f8 ff ff 89  .......t........
  72 10 49 8b b6 f0 00 00-00 48 89 72 08 49 89 96  r.I......H.r.I..
  f0 00 00 00 eb ad 4c 89-f7 48 89 de e8 e2 fa 02  ......L..H......
  00 4c 89 f7 48 89 de 5b-41 5e 5d e9 b3 6b 01 00  .L..H..[A^]..k..
  
Thread 0 last branch register state not available.


Binary Images:
       0x10d54d000 -        0x10e070fff +spec-runner (0) <5A765076-F2B4-3211-85C3-89C054DC0FA4> /Users/USER/*/spec-runner
       0x110685000 -        0x110720fff  dyld (852.2) <57DB2053-BFD5-3683-97C6-F1DB2A1F1D09> /usr/lib/dyld
    0x7fff201dd000 -     0x7fff201defff  libsystem_blocks.dylib (79) <C05B8BD3-ADF0-37BD-BF53-664D03226FD9> /usr/lib/system/libsystem_blocks.dylib
    0x7fff201df000 -     0x7fff20214fff  libxpc.dylib (2038.120.1) <D3D34FC5-2269-399E-A637-4D33E6BAFC64> /usr/lib/system/libxpc.dylib
    0x7fff20215000 -     0x7fff2022cfff  libsystem_trace.dylib (1277.120.1) <5B36BE08-BABA-3F2F-934B-B3FFD10A07A3> /usr/lib/system/libsystem_trace.dylib
    0x7fff2022d000 -     0x7fff202cafff  libcorecrypto.dylib (1000.140.4) <75692EFA-23F5-381B-A2BB-A8C8B78FCFAA> /usr/lib/system/libcorecrypto.dylib
    0x7fff202cb000 -     0x7fff202f7fff  libsystem_malloc.dylib (317.140.5) <0AEDABF0-CFF7-3304-9FF8-EB3BBF0801E6> /usr/lib/system/libsystem_malloc.dylib
    0x7fff202f8000 -     0x7fff2033cfff  libdispatch.dylib (1271.120.2) <B0C73267-1BD9-3BEF-97CC-3B3D295FA58A> /usr/lib/system/libdispatch.dylib
    0x7fff2033d000 -     0x7fff20376fff  libobjc.A.dylib (824) <551C4322-3921-3703-8CC6-1E8E143BB474> /usr/lib/libobjc.A.dylib
    0x7fff20377000 -     0x7fff20379fff  libsystem_featureflags.dylib (28.60.1) <45D158F7-C4E4-3BDE-A218-AD346686E7AB> /usr/lib/system/libsystem_featureflags.dylib
    0x7fff2037a000 -     0x7fff20402fff  libsystem_c.dylib (1439.141.1) <337F746F-8232-3439-BBFF-BAB9C10731F4> /usr/lib/system/libsystem_c.dylib
    0x7fff20403000 -     0x7fff20458fff  libc++.1.dylib (905.6) <F4EC1A92-1DFC-3228-9868-5377EB375100> /usr/lib/libc++.1.dylib
    0x7fff20459000 -     0x7fff2046efff  libc++abi.dylib (905.6) <2F9B5E97-FD54-342A-8233-A5ECCD949F81> /usr/lib/libc++abi.dylib
    0x7fff2046f000 -     0x7fff2049efff  libsystem_kernel.dylib (7195.141.2) <B51DEA59-1260-35C6-B7B6-AA6D8459ECEC> /usr/lib/system/libsystem_kernel.dylib
    0x7fff2049f000 -     0x7fff204aafff  libsystem_pthread.dylib (454.120.2) <B1A74420-49E9-32FC-BFCB-E53550236A23> /usr/lib/system/libsystem_pthread.dylib
    0x7fff204ab000 -     0x7fff204e6fff  libdyld.dylib (852.2) <11007DE4-ABE1-3079-BF1C-4D0EADA884DD> /usr/lib/system/libdyld.dylib
    0x7fff204e7000 -     0x7fff204f0fff  libsystem_platform.dylib (254.80.2) <6F368391-D41B-3A7E-9992-6000FA985F21> /usr/lib/system/libsystem_platform.dylib
    0x7fff204f1000 -     0x7fff2051cfff  libsystem_info.dylib (542.40.3) <3965B574-34FA-3CF8-BB0B-FCEC7DA8C493> /usr/lib/system/libsystem_info.dylib
    0x7fff228ec000 -     0x7fff228f5fff  libsystem_darwin.dylib (1439.141.1) <3D4F1678-BA4A-3318-8DD0-D391F3AB9986> /usr/lib/system/libsystem_darwin.dylib
    0x7fff22d0b000 -     0x7fff22d16fff  libsystem_notify.dylib (279.40.4) <1AE27156-89B5-3E4A-AB14-A77E91F93DC7> /usr/lib/system/libsystem_notify.dylib
    0x7fff24ca3000 -     0x7fff24cb1fff  libsystem_networkextension.dylib (1295.140.3) <8D9FA7DC-AE37-3C15-B730-B9E3CA879BA7> /usr/lib/system/libsystem_networkextension.dylib
    0x7fff24d10000 -     0x7fff24d26fff  libsystem_asl.dylib (385) <9284A3C6-2AB1-3596-BD6C-0D19C7A0DD99> /usr/lib/system/libsystem_asl.dylib
    0x7fff263ed000 -     0x7fff263f4fff  libsystem_symptoms.dylib (1431.140.1) <D2EDA831-DD60-318D-B59E-60429F9BF82F> /usr/lib/system/libsystem_symptoms.dylib
    0x7fff283fc000 -     0x7fff2840cfff  libsystem_containermanager.dylib (318.100.4) <6A824A01-6B4C-30DA-907A-580FD51773B8> /usr/lib/system/libsystem_containermanager.dylib
    0x7fff29110000 -     0x7fff29113fff  libsystem_configuration.dylib (1109.140.1) <99C91EBA-ADE0-3904-8F9C-38B0E3830936> /usr/lib/system/libsystem_configuration.dylib
    0x7fff29114000 -     0x7fff29118fff  libsystem_sandbox.dylib (1441.141.1) <AF683466-5935-369E-A915-006F13CDAD99> /usr/lib/system/libsystem_sandbox.dylib
    0x7fff29e0a000 -     0x7fff29e0cfff  libquarantine.dylib (119.40.2) <C34FBC7A-963B-3F1D-BBC1-D3C6BB46E14B> /usr/lib/system/libquarantine.dylib
    0x7fff2a3b5000 -     0x7fff2a3b9fff  libsystem_coreservices.dylib (127.1) <8F154612-D3F5-3DEB-AF88-48247ABF988E> /usr/lib/system/libsystem_coreservices.dylib
    0x7fff2a5c9000 -     0x7fff2a610fff  libsystem_m.dylib (3186.100.3) <46DC091D-F61F-3D16-A417-51C5D4D6912E> /usr/lib/system/libsystem_m.dylib
    0x7fff2a611000 -     0x7fff2a611fff  libcharset.1.dylib (59) <DCF853C3-4E07-3298-96A6-A759CB51D828> /usr/lib/libcharset.1.dylib
    0x7fff2a612000 -     0x7fff2a617fff  libmacho.dylib (980) <2696D4F7-BF83-304F-BDED-9CC268B5FE4E> /usr/lib/system/libmacho.dylib
    0x7fff2a634000 -     0x7fff2a63ffff  libcommonCrypto.dylib (60178.120.3) <79B2C85C-C388-3AFF-B47C-DF0EE43FD292> /usr/lib/system/libcommonCrypto.dylib
    0x7fff2a640000 -     0x7fff2a64afff  libunwind.dylib (201) <072F009A-A981-308F-BEC5-06D58CA30BCF> /usr/lib/system/libunwind.dylib
    0x7fff2a64b000 -     0x7fff2a652fff  liboah.dylib (203.58) <A7FFAFB5-B0AB-312E-8EB6-FAF56D76FB7D> /usr/lib/liboah.dylib
    0x7fff2a653000 -     0x7fff2a65dfff  libcopyfile.dylib (173.40.2) <569E5E4E-73BE-3C12-818F-713DA0591E1D> /usr/lib/system/libcopyfile.dylib
    0x7fff2a65e000 -     0x7fff2a665fff  libcompiler_rt.dylib (102.2) <396ECEB9-331A-3100-8FA3-BFF3CFC760D6> /usr/lib/system/libcompiler_rt.dylib
    0x7fff2a666000 -     0x7fff2a668fff  libsystem_collections.dylib (1439.141.1) <AC793F4A-A519-33D5-AE4B-8F903A7B9551> /usr/lib/system/libsystem_collections.dylib
    0x7fff2a669000 -     0x7fff2a66bfff  libsystem_secinit.dylib (87.60.1) <FB875594-4026-3AFB-AF61-BCD1A67478CC> /usr/lib/system/libsystem_secinit.dylib
    0x7fff2a66c000 -     0x7fff2a66efff  libremovefile.dylib (49.120.1) <9646E2E1-71D1-3463-A556-8CD96059A4A9> /usr/lib/system/libremovefile.dylib
    0x7fff2a66f000 -     0x7fff2a66ffff  libkeymgr.dylib (31) <07EC6CD6-0DCC-321C-856B-65FF4327E963> /usr/lib/system/libkeymgr.dylib
    0x7fff2a670000 -     0x7fff2a677fff  libsystem_dnssd.dylib (1310.140.1) <A6F00D58-D64A-35B5-8777-93FC2A690675> /usr/lib/system/libsystem_dnssd.dylib
    0x7fff2a678000 -     0x7fff2a67dfff  libcache.dylib (83) <B92F6CCC-FF53-36B1-BBE0-F056080945D7> /usr/lib/system/libcache.dylib
    0x7fff2a67e000 -     0x7fff2a67ffff  libSystem.B.dylib (1292.120.1) <46BD4B87-AAC4-3070-BF8B-6BE393247BBE> /usr/lib/libSystem.B.dylib
    0x7fff2a6bd000 -     0x7fff2a7adfff  libiconv.2.dylib (59) <CDC9F158-F290-38C7-A31D-F25991A2BCAB> /usr/lib/libiconv.2.dylib
    0x7fff2cf1b000 -     0x7fff2cf33fff  libresolv.9.dylib (68) <9EE291CF-A18A-3D09-A8CC-682AAF448176> /usr/lib/libresolv.9.dylib
    0x7fff2da87000 -     0x7fff2da87fff  liblaunch.dylib (2038.120.1) <CA5C47E3-5580-3C92-9603-9404291FAE58> /usr/lib/system/liblaunch.dylib
    0x7fff2ff1e000 -     0x7fff2ff1efff  libsystem_product_info_filter.dylib (8.40.1) <C983DE00-5802-390A-9FEC-703E0E9A2114> /usr/lib/system/libsystem_product_info_filter.dylib

External Modification Summary:
  Calls made by other processes targeting this process:
    task_for_pid: 0
    thread_create: 0
    thread_set_state: 0
  Calls made by this process:
    task_for_pid: 0
    thread_create: 0
    thread_set_state: 0
  Calls made by all processes on this machine:
    task_for_pid: 11
    thread_create: 0
    thread_set_state: 33

VM Region Summary:
ReadOnly portion of Libraries: Total=520.1M resident=0K(0%) swapped_out_or_unallocated=520.1M(100%)
Writable regions: Total=1.1G written=0K(0%) resident=0K(0%) swapped_out=0K(0%) unallocated=1.1G(100%)
 
                                VIRTUAL   REGION 
REGION TYPE                        SIZE    COUNT (non-coalesced) 
===========                     =======  ======= 
Kernel Alloc Once                    8K        1 
MALLOC                           136.2M       37 
MALLOC guard page                   24K        5 
MALLOC_MEDIUM (reserved)         960.0M        8         reserved VM address space (unallocated)
Stack                             8188K        1 
Stack Guard                       56.0M        1 
VM_ALLOCATE                        144K        5 
__DATA                             424K       46 
__DATA_CONST                      1867K       37 
__DATA_DIRTY                        58K       22 
__LINKEDIT                       503.0M        4 
__OBJC_RO                         70.2M        1 
__OBJC_RW                         2496K        2 
__TEXT                            17.1M       47 
shared memory                        8K        2 
===========                     =======  ======= 
TOTAL                              1.7G      219 
TOTAL, minus reserved VM space   795.4M      219 


Process:               spec-runner [37852]
Path:                  /Users/USER/*/spec-runner
Identifier:            spec-runner
Version:               0
Code Type:             X86-64 (Native)
Parent Process:        bash [37431]
Responsible:           iTerm2 [37428]
User ID:               501

Date/Time:             2021-08-16 20:56:12.550 -0700
OS Version:            macOS 11.5.2 (20G95)
Report Version:        12
Bridge OS Version:     5.5 (18P4759a)
Anonymous UUID:        E11EC264-CE69-D6A7-7C4F-F32DEBF9DEDF

Sleep/Wake UUID:       2AB5C465-C9C8-45B8-82A3-E63A2290DC50

Time Awake Since Boot: 16000 seconds
Time Since Wake:       84 seconds

System Integrity Protection: enabled

Crashed Thread:        0  Dispatch queue: com.apple.main-thread

Exception Type:        EXC_BAD_ACCESS (SIGSEGV)
Exception Codes:       KERN_INVALID_ADDRESS at 0x00007fe40000179b
Exception Note:        EXC_CORPSE_NOTIFY

Termination Signal:    Segmentation fault: 11
Termination Reason:    Namespace SIGNAL, Code 0xb
Terminating Process:   exc handler [37852]

VM Regions Near 0x7fe40000179b:
    __LINKEDIT                  11781c000-117820000    [   16K] r--/r-- SM=NUL  /usr/lib/dyld
--> 
    MALLOC_TINY              7fe425c00000-7fe425d00000 [ 1024K] rw-/rwx SM=PRV  

Thread 0 Crashed:: Dispatch queue: com.apple.main-thread
0   spec-runner                   	0x00000001086d435d gc_mark_children + 381
1   spec-runner                   	0x00000001086d3593 incremental_gc + 851
2   spec-runner                   	0x00000001086d2803 mrb_incremental_gc + 115
3   spec-runner                   	0x00000001086d20cb mrb_obj_alloc + 123
4   spec-runner                   	0x000000010870c4e7 mrb_instance_alloc + 55
5   spec-runner                   	0x000000010870c5a1 mrb_obj_new + 33
6   spec-runner                   	0x00000001086f1a9d mrb_no_method_error + 221
7   spec-runner                   	0x00000001087118db mrb_method_missing + 27
8   spec-runner                   	0x00000001087120ed mrb_obj_missing + 77
9   spec-runner                   	0x00000001086f8910 mrb_vm_exec + 19360
10  spec-runner                   	0x00000001086f3cf0 mrb_vm_run + 256
11  spec-runner                   	0x000000010873845e mrb_load_exec + 1038
12  spec-runner                   	0x000000010871133d mrb_protect + 125
13  spec-runner                   	0x0000000108622a4e artichoke_backend::eval::_$LT$impl$u20$artichoke_core..eval..Eval$u20$for$u20$artichoke_backend..artichoke..Artichoke$GT$::eval::hac35e810ecec8aa1 + 238
14  spec-runner                   	0x0000000108625c46 artichoke_backend::load::_$LT$impl$u20$artichoke_core..load..LoadSources$u20$for$u20$artichoke_backend..artichoke..Artichoke$GT$::require_source::h28a15d09e1b54b60 + 534
15  spec-runner                   	0x000000010862fa3d artichoke_backend::extn::core::kernel::require::require_relative::h96be5ae40302c759 + 1581
16  spec-runner                   	0x00000001086bd474 artichoke_backend::extn::core::kernel::trampoline::require_relative::heb33f0f1e4d527f2 + 100
17  spec-runner                   	0x000000010868b659 artichoke_backend::extn::core::kernel::mruby::artichoke_kernel_require_relative::hf90ef4a664bcf90c + 169
18  spec-runner                   	0x00000001086f8910 mrb_vm_exec + 19360
19  spec-runner                   	0x00000001086f3cf0 mrb_vm_run + 256
20  spec-runner                   	0x000000010873845e mrb_load_exec + 1038
21  spec-runner                   	0x000000010871133d mrb_protect + 125
22  spec-runner                   	0x0000000108622a4e artichoke_backend::eval::_$LT$impl$u20$artichoke_core..eval..Eval$u20$for$u20$artichoke_backend..artichoke..Artichoke$GT$::eval::hac35e810ecec8aa1 + 238
23  spec-runner                   	0x00000001086258be artichoke_backend::load::_$LT$impl$u20$artichoke_core..load..LoadSources$u20$for$u20$artichoke_backend..artichoke..Artichoke$GT$::load_source::h9ea506296ea604c7 + 558
24  spec-runner                   	0x000000010862ebbd artichoke_backend::extn::core::kernel::require::load::h491d6f08e68c8bbf + 1453
25  spec-runner                   	0x000000010868aadd artichoke_backend::extn::core::kernel::mruby::artichoke_kernel_load::he9bbed2c25576279 + 157
26  spec-runner                   	0x00000001086f8910 mrb_vm_exec + 19360
27  spec-runner                   	0x00000001086f3cf0 mrb_vm_run + 256
28  spec-runner                   	0x00000001086f2d71 mrb_funcall_with_block + 1649
29  spec-runner                   	0x00000001086f2567 mrb_funcall_argv + 39
30  spec-runner                   	0x000000010871133d mrb_protect + 125
31  spec-runner                   	0x0000000108614572 artichoke_backend::artichoke::Artichoke::with_ffi_boundary::hce402f0b29429bc3 + 258
32  spec-runner                   	0x000000010864ce88 _$LT$artichoke_backend..value..Value$u20$as$u20$artichoke_core..value..Value$GT$::funcall::h64846a7101d5ea42 + 1000
33  spec-runner                   	0x00000001085a01e2 spec_runner::mspec::run::h2c7938e394cc01d7 + 626 (mspec.rs:92)
34  spec-runner                   	0x000000010859c282 spec_runner::try_main::h0cea417a0c7a6273 + 2609 (main.rs:215) [inlined]
35  spec-runner                   	0x000000010859c282 spec_runner::main::h0c05aaf15d13e44b + 4690 (main.rs:160)
36  spec-runner                   	0x00000001085b014a core::ops::function::FnOnce::call_once::hd6e23e3efb3747ca + 2 (function.rs:227) [inlined]
37  spec-runner                   	0x00000001085b014a std::sys_common::backtrace::__rust_begin_short_backtrace::he501278bd57a7322 + 10 (backtrace.rs:125)
38  spec-runner                   	0x00000001085b016c std::rt::lang_start::_$u7b$$u7b$closure$u7d$$u7d$::hbab6f1e7fea35939 + 12 (rt.rs:49)
39  spec-runner                   	0x000000010882c101 std::rt::lang_start_internal::h4428f22d05a79c62 + 641
40  spec-runner                   	0x000000010859c6d9 main + 41
41  libdyld.dylib                 	0x00007fff204c0f3d start + 1

Thread 0 crashed with X86 Thread State (64-bit):
  rax: 0x0000000000000001  rbx: 0x00007fe488192dd0  rcx: 0x00007fe40000179b  rdx: 0x00000001086d4550
  rdi: 0x00007fe48600b200  rsi: 0x00007fe488192dd0  rbp: 0x00007ffee7712cf0  rsp: 0x00007ffee7712ce0
   r8: 0x00000000ffffffff   r9: 0x00000000000004e6  r10: 0x00007fe466008200  r11: 0x00000000000000ff
  r12: 0x00000000000007d0  r13: 0x0000000000000562  r14: 0x00007fe48600b200  r15: 0x00000001086d3e68
  rip: 0x00000001086d435d  rfl: 0x0000000000010202  cr2: 0x00007fe40000179b
  
Logical CPU:     10
Error Code:      0x00000004 (no mapping for user data read)
Trap Number:     14

Thread 0 instruction stream:
  1b 81 e1 ff f8 ff ff 89-48 10 49 8b 8e f0 00 00  ........H.I.....
  00 48 89 48 08 49 89 86-f0 00 00 00 48 8b 43 28  .H.H.I......H.C(
  48 85 c0 0f 85 ea 01 00-00 e9 20 02 00 00 48 8b  H......... ...H.
  43 18 48 85 c0 0f 84 13-02 00 00 48 8b 4b 28 48  C.H........H.K(H
  83 c1 08 eb 1b 66 2e 0f-1f 84 00 00 00 00 00 0f  .....f..........
  1f 40 00 48 83 c1 10 48-ff c8 0f 84 ee 01 00 00  .@.H...H........
 [83]39 07 72 ee 48 8b 51-f8 48 85 d2 74 e5 8b 72  .9.r.H.Q.H..t..r	<==
  10 f7 c6 00 03 00 00 74-da 89 f7 81 e7 00 07 00  .......t........
  00 81 ff 00 07 00 00 74-ca 81 e6 ff f8 ff ff 89  .......t........
  72 10 49 8b b6 f0 00 00-00 48 89 72 08 49 89 96  r.I......H.r.I..
  f0 00 00 00 eb ad 4c 89-f7 48 89 de e8 e2 fa 02  ......L..H......
  00 4c 89 f7 48 89 de 5b-41 5e 5d e9 b3 6b 01 00  .L..H..[A^]..k..
  
Thread 0 last branch register state not available.


Binary Images:
       0x1084e4000 -        0x109007fff +spec-runner (0) <5A765076-F2B4-3211-85C3-89C054DC0FA4> /Users/USER/*/spec-runner
       0x117708000 -        0x1177a3fff  dyld (852.2) <57DB2053-BFD5-3683-97C6-F1DB2A1F1D09> /usr/lib/dyld
    0x7fff201dd000 -     0x7fff201defff  libsystem_blocks.dylib (79) <C05B8BD3-ADF0-37BD-BF53-664D03226FD9> /usr/lib/system/libsystem_blocks.dylib
    0x7fff201df000 -     0x7fff20214fff  libxpc.dylib (2038.120.1) <D3D34FC5-2269-399E-A637-4D33E6BAFC64> /usr/lib/system/libxpc.dylib
    0x7fff20215000 -     0x7fff2022cfff  libsystem_trace.dylib (1277.120.1) <5B36BE08-BABA-3F2F-934B-B3FFD10A07A3> /usr/lib/system/libsystem_trace.dylib
    0x7fff2022d000 -     0x7fff202cafff  libcorecrypto.dylib (1000.140.4) <75692EFA-23F5-381B-A2BB-A8C8B78FCFAA> /usr/lib/system/libcorecrypto.dylib
    0x7fff202cb000 -     0x7fff202f7fff  libsystem_malloc.dylib (317.140.5) <0AEDABF0-CFF7-3304-9FF8-EB3BBF0801E6> /usr/lib/system/libsystem_malloc.dylib
    0x7fff202f8000 -     0x7fff2033cfff  libdispatch.dylib (1271.120.2) <B0C73267-1BD9-3BEF-97CC-3B3D295FA58A> /usr/lib/system/libdispatch.dylib
    0x7fff2033d000 -     0x7fff20376fff  libobjc.A.dylib (824) <551C4322-3921-3703-8CC6-1E8E143BB474> /usr/lib/libobjc.A.dylib
    0x7fff20377000 -     0x7fff20379fff  libsystem_featureflags.dylib (28.60.1) <45D158F7-C4E4-3BDE-A218-AD346686E7AB> /usr/lib/system/libsystem_featureflags.dylib
    0x7fff2037a000 -     0x7fff20402fff  libsystem_c.dylib (1439.141.1) <337F746F-8232-3439-BBFF-BAB9C10731F4> /usr/lib/system/libsystem_c.dylib
    0x7fff20403000 -     0x7fff20458fff  libc++.1.dylib (905.6) <F4EC1A92-1DFC-3228-9868-5377EB375100> /usr/lib/libc++.1.dylib
    0x7fff20459000 -     0x7fff2046efff  libc++abi.dylib (905.6) <2F9B5E97-FD54-342A-8233-A5ECCD949F81> /usr/lib/libc++abi.dylib
    0x7fff2046f000 -     0x7fff2049efff  libsystem_kernel.dylib (7195.141.2) <B51DEA59-1260-35C6-B7B6-AA6D8459ECEC> /usr/lib/system/libsystem_kernel.dylib
    0x7fff2049f000 -     0x7fff204aafff  libsystem_pthread.dylib (454.120.2) <B1A74420-49E9-32FC-BFCB-E53550236A23> /usr/lib/system/libsystem_pthread.dylib
    0x7fff204ab000 -     0x7fff204e6fff  libdyld.dylib (852.2) <11007DE4-ABE1-3079-BF1C-4D0EADA884DD> /usr/lib/system/libdyld.dylib
    0x7fff204e7000 -     0x7fff204f0fff  libsystem_platform.dylib (254.80.2) <6F368391-D41B-3A7E-9992-6000FA985F21> /usr/lib/system/libsystem_platform.dylib
    0x7fff204f1000 -     0x7fff2051cfff  libsystem_info.dylib (542.40.3) <3965B574-34FA-3CF8-BB0B-FCEC7DA8C493> /usr/lib/system/libsystem_info.dylib
    0x7fff228ec000 -     0x7fff228f5fff  libsystem_darwin.dylib (1439.141.1) <3D4F1678-BA4A-3318-8DD0-D391F3AB9986> /usr/lib/system/libsystem_darwin.dylib
    0x7fff22d0b000 -     0x7fff22d16fff  libsystem_notify.dylib (279.40.4) <1AE27156-89B5-3E4A-AB14-A77E91F93DC7> /usr/lib/system/libsystem_notify.dylib
    0x7fff24ca3000 -     0x7fff24cb1fff  libsystem_networkextension.dylib (1295.140.3) <8D9FA7DC-AE37-3C15-B730-B9E3CA879BA7> /usr/lib/system/libsystem_networkextension.dylib
    0x7fff24d10000 -     0x7fff24d26fff  libsystem_asl.dylib (385) <9284A3C6-2AB1-3596-BD6C-0D19C7A0DD99> /usr/lib/system/libsystem_asl.dylib
    0x7fff263ed000 -     0x7fff263f4fff  libsystem_symptoms.dylib (1431.140.1) <D2EDA831-DD60-318D-B59E-60429F9BF82F> /usr/lib/system/libsystem_symptoms.dylib
    0x7fff283fc000 -     0x7fff2840cfff  libsystem_containermanager.dylib (318.100.4) <6A824A01-6B4C-30DA-907A-580FD51773B8> /usr/lib/system/libsystem_containermanager.dylib
    0x7fff29110000 -     0x7fff29113fff  libsystem_configuration.dylib (1109.140.1) <99C91EBA-ADE0-3904-8F9C-38B0E3830936> /usr/lib/system/libsystem_configuration.dylib
    0x7fff29114000 -     0x7fff29118fff  libsystem_sandbox.dylib (1441.141.1) <AF683466-5935-369E-A915-006F13CDAD99> /usr/lib/system/libsystem_sandbox.dylib
    0x7fff29e0a000 -     0x7fff29e0cfff  libquarantine.dylib (119.40.2) <C34FBC7A-963B-3F1D-BBC1-D3C6BB46E14B> /usr/lib/system/libquarantine.dylib
    0x7fff2a3b5000 -     0x7fff2a3b9fff  libsystem_coreservices.dylib (127.1) <8F154612-D3F5-3DEB-AF88-48247ABF988E> /usr/lib/system/libsystem_coreservices.dylib
    0x7fff2a5c9000 -     0x7fff2a610fff  libsystem_m.dylib (3186.100.3) <46DC091D-F61F-3D16-A417-51C5D4D6912E> /usr/lib/system/libsystem_m.dylib
    0x7fff2a611000 -     0x7fff2a611fff  libcharset.1.dylib (59) <DCF853C3-4E07-3298-96A6-A759CB51D828> /usr/lib/libcharset.1.dylib
    0x7fff2a612000 -     0x7fff2a617fff  libmacho.dylib (980) <2696D4F7-BF83-304F-BDED-9CC268B5FE4E> /usr/lib/system/libmacho.dylib
    0x7fff2a634000 -     0x7fff2a63ffff  libcommonCrypto.dylib (60178.120.3) <79B2C85C-C388-3AFF-B47C-DF0EE43FD292> /usr/lib/system/libcommonCrypto.dylib
    0x7fff2a640000 -     0x7fff2a64afff  libunwind.dylib (201) <072F009A-A981-308F-BEC5-06D58CA30BCF> /usr/lib/system/libunwind.dylib
    0x7fff2a64b000 -     0x7fff2a652fff  liboah.dylib (203.58) <A7FFAFB5-B0AB-312E-8EB6-FAF56D76FB7D> /usr/lib/liboah.dylib
    0x7fff2a653000 -     0x7fff2a65dfff  libcopyfile.dylib (173.40.2) <569E5E4E-73BE-3C12-818F-713DA0591E1D> /usr/lib/system/libcopyfile.dylib
    0x7fff2a65e000 -     0x7fff2a665fff  libcompiler_rt.dylib (102.2) <396ECEB9-331A-3100-8FA3-BFF3CFC760D6> /usr/lib/system/libcompiler_rt.dylib
    0x7fff2a666000 -     0x7fff2a668fff  libsystem_collections.dylib (1439.141.1) <AC793F4A-A519-33D5-AE4B-8F903A7B9551> /usr/lib/system/libsystem_collections.dylib
    0x7fff2a669000 -     0x7fff2a66bfff  libsystem_secinit.dylib (87.60.1) <FB875594-4026-3AFB-AF61-BCD1A67478CC> /usr/lib/system/libsystem_secinit.dylib
    0x7fff2a66c000 -     0x7fff2a66efff  libremovefile.dylib (49.120.1) <9646E2E1-71D1-3463-A556-8CD96059A4A9> /usr/lib/system/libremovefile.dylib
    0x7fff2a66f000 -     0x7fff2a66ffff  libkeymgr.dylib (31) <07EC6CD6-0DCC-321C-856B-65FF4327E963> /usr/lib/system/libkeymgr.dylib
    0x7fff2a670000 -     0x7fff2a677fff  libsystem_dnssd.dylib (1310.140.1) <A6F00D58-D64A-35B5-8777-93FC2A690675> /usr/lib/system/libsystem_dnssd.dylib
    0x7fff2a678000 -     0x7fff2a67dfff  libcache.dylib (83) <B92F6CCC-FF53-36B1-BBE0-F056080945D7> /usr/lib/system/libcache.dylib
    0x7fff2a67e000 -     0x7fff2a67ffff  libSystem.B.dylib (1292.120.1) <46BD4B87-AAC4-3070-BF8B-6BE393247BBE> /usr/lib/libSystem.B.dylib
    0x7fff2a6bd000 -     0x7fff2a7adfff  libiconv.2.dylib (59) <CDC9F158-F290-38C7-A31D-F25991A2BCAB> /usr/lib/libiconv.2.dylib
    0x7fff2cf1b000 -     0x7fff2cf33fff  libresolv.9.dylib (68) <9EE291CF-A18A-3D09-A8CC-682AAF448176> /usr/lib/libresolv.9.dylib
    0x7fff2da87000 -     0x7fff2da87fff  liblaunch.dylib (2038.120.1) <CA5C47E3-5580-3C92-9603-9404291FAE58> /usr/lib/system/liblaunch.dylib
    0x7fff2ff1e000 -     0x7fff2ff1efff  libsystem_product_info_filter.dylib (8.40.1) <C983DE00-5802-390A-9FEC-703E0E9A2114> /usr/lib/system/libsystem_product_info_filter.dylib

External Modification Summary:
  Calls made by other processes targeting this process:
    task_for_pid: 0
    thread_create: 0
    thread_set_state: 0
  Calls made by this process:
    task_for_pid: 0
    thread_create: 0
    thread_set_state: 0
  Calls made by all processes on this machine:
    task_for_pid: 11
    thread_create: 0
    thread_set_state: 33

VM Region Summary:
ReadOnly portion of Libraries: Total=520.1M resident=0K(0%) swapped_out_or_unallocated=520.1M(100%)
Writable regions: Total=977.5M written=0K(0%) resident=0K(0%) swapped_out=0K(0%) unallocated=977.5M(100%)
 
                                VIRTUAL   REGION 
REGION TYPE                        SIZE    COUNT (non-coalesced) 
===========                     =======  ======= 
Kernel Alloc Once                    8K        1 
MALLOC                           129.2M       37 
MALLOC guard page                   24K        5 
MALLOC_MEDIUM (reserved)         840.0M        7         reserved VM address space (unallocated)
Stack                             8188K        1 
Stack Guard                       56.0M        1 
VM_ALLOCATE                        144K        5 
__DATA                             424K       46 
__DATA_CONST                      1867K       37 
__DATA_DIRTY                        58K       22 
__LINKEDIT                       503.0M        4 
__OBJC_RO                         70.2M        1 
__OBJC_RW                         2496K        2 
__TEXT                            17.1M       47 
shared memory                        8K        2 
===========                     =======  ======= 
TOTAL                              1.6G      218 
TOTAL, minus reserved VM space   788.4M      218

@lopopolo
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Here's some poking around lldb from a release build core dump

(lldb) bt
* thread #1, stop reason = signal SIGSTOP
  * frame #0: 0x00000001091d1a4d spec-runner`gc_mark_children(mrb=0x00007fd8db80b200, gc=<unavailable>, obj=0x00007fd8c0092dd0) at gc.c:751:9 [opt]
    frame #1: 0x00000001091d0c83 spec-runner`incremental_gc at gc.c:1072:5 [opt]
    frame #2: 0x00000001091d0c53 spec-runner`incremental_gc(mrb=<unavailable>, gc=0x00007fd8db80b2b8, limit=2000) at gc.c:1188 [opt]
    frame #3: 0x00000001091cfef3 spec-runner`mrb_incremental_gc [inlined] incremental_gc_step(mrb=0x00007fd8db80b200, gc=0x00007fd8db80b2b8) at gc.c:1223:15 [opt]
    frame #4: 0x00000001091cfecf spec-runner`mrb_incremental_gc(mrb=0x00007fd8db80b200) at gc.c:1267 [opt]
    frame #5: 0x00000001091cf7bb spec-runner`mrb_obj_alloc(mrb=0x00007fd8db80b200, ttype=MRB_TT_PROC, cls=0x00007fd8e0063e80) at gc.c:567:5 [opt]
    frame #6: 0x00000001091cc43d spec-runner`mrb_mruby_proc_ext_gem_init(mrb=<unavailable>) at proc.c:186:3 [opt]
    frame #7: 0x0000000109216a06 spec-runner`mrb_vm_exec(mrb=0x00007fd8db80b200, proc=<unavailable>, pc="0\U00000002") at vm.c:2630:13 [opt]
    frame #8: 0x0000000109208750 spec-runner`mrb_vm_run(mrb=0x00007fd8db80b200, proc=0x00007fd898013760, self=mrb_value @ 0x00007fe4a07924a0, stack_keep=<unavailable>) at vm.c:971:12 [opt]
    frame #9: 0x00000001092185c8 spec-runner`mrb_top_run(mrb=<unavailable>, proc=<unavailable>, self=<unavailable>, stack_keep=<unavailable>) at vm.c:0 [opt] [artificial]
    frame #10: 0x00000001091eb56e spec-runner`mrb_load_exec(mrb=0x00007fd8db80b200, p=<unavailable>, c=0x00007fd8db409ff0) at parse.y:6808:7 [opt]
    frame #11: 0x00000001091fd74d spec-runner`mrb_protect(mrb=0x00007fd8db80b200, body=(spec-runner`_$LT$artichoke_backend..sys..protect..Eval$u20$as$u20$artichoke_backend..sys..protect..Protect$GT$::run::h14c32b1e7d884dd3 at protect.rs:105), data=mrb_value @ 0x00007fe4a0794dd0, state="") at exception.c:17:14 [opt]
    frame #12: 0x00000001090f68ee spec-runner`artichoke_backend::eval::_$LT$impl$u20$artichoke_core..eval..Eval$u20$for$u20$artichoke_backend..artichoke..Artichoke$GT$::eval::hac35e810ecec8aa1 at protect.rs:46:17 [opt]
    frame #13: 0x00000001090f68a3 spec-runner`artichoke_backend::eval::_$LT$impl$u20$artichoke_core..eval..Eval$u20$for$u20$artichoke_backend..artichoke..Artichoke$GT$::eval::hac35e810ecec8aa1 at protect.rs:25 [opt]
    frame #14: 0x00000001090f68a3 spec-runner`artichoke_backend::eval::_$LT$impl$u20$artichoke_core..eval..Eval$u20$for$u20$artichoke_backend..artichoke..Artichoke$GT$::eval::hac35e810ecec8aa1 [inlined] artichoke_backend::eval::_$LT$impl$u20$artichoke_core..eval..Eval$u20$for$u20$artichoke_backend..artichoke..Artichoke$GT$::eval::_$u7b$$u7b$closure$u7d$$u7d$::h242cce8e5caeb3f6(mrb=0x00007fd8db80b200) at eval.rs:28 [opt]
    frame #15: 0x00000001090f68a3 spec-runner`artichoke_backend::eval::_$LT$impl$u20$artichoke_core..eval..Eval$u20$for$u20$artichoke_backend..artichoke..Artichoke$GT$::eval::hac35e810ecec8aa1 at artichoke.rs:99 [opt]
    frame #16: 0x00000001090f6890 spec-runner`artichoke_backend::eval::_$LT$impl$u20$artichoke_core..eval..Eval$u20$for$u20$artichoke_backend..artichoke..Artichoke$GT$::eval::hac35e810ecec8aa1(self=0x00007ffee6c44328, code=size=1238) at eval.rs:28 [opt]
    frame #17: 0x00000001090f975e spec-runner`artichoke_backend::load::_$LT$impl$u20$artichoke_core..load..LoadSources$u20$for$u20$artichoke_backend..artichoke..Artichoke$GT$::load_source::h9ea506296ea604c7(self=0x00007ffee6c44328, path=<unavailable>) at load.rs:125:9 [opt]
    frame #18: 0x0000000109102a5d spec-runner`artichoke_backend::extn::core::kernel::require::load::h491d6f08e68c8bbf(interp=0x00007ffee6c44328, filename=Value @ 0x00007ffee6c44218) at require.rs:35:22 [opt]
    frame #19: 0x000000010915eb1d spec-runner`artichoke_backend::extn::core::kernel::mruby::artichoke_kernel_load::he9bbed2c25576279 [inlined] artichoke_backend::extn::core::kernel::trampoline::load::h3615d7aed27ed576(interp=<unavailable>, path=Value @ 0x00007fe4a06e3f60) at trampoline.rs:18:19 [opt]
    frame #20: 0x000000010915eb0f spec-runner`artichoke_backend::extn::core::kernel::mruby::artichoke_kernel_load::he9bbed2c25576279(mrb=<unavailable>, _slf=<unavailable>) at mruby.rs:64 [opt]
    frame #21: 0x000000010920d370 spec-runner`mrb_vm_exec(mrb=0x00007fd8db80b200, proc=<unavailable>, pc="9\U00000002") at vm.c:1443:18 [opt]
    frame #22: 0x0000000109208750 spec-runner`mrb_vm_run(mrb=0x00007fd8db80b200, proc=0x00007fd8e009b780, self=mrb_value @ 0x00007fe4a06e6b70, stack_keep=<unavailable>) at vm.c:971:12 [opt]
    frame #23: 0x00000001092077cd spec-runner`mrb_funcall_with_block [inlined] cipop(mrb=0x00007fd8db80b200) at vm.c:302:39 [opt]
    frame #24: 0x00000001092077c7 spec-runner`mrb_funcall_with_block(mrb=0x00007fd8db80b200, self=mrb_value @ 0x00007fe4e042bcb0, mid=1008, argc=<unavailable>, argv=<unavailable>, blk=mrb_value @ 0x00007ffee6c466a0) at vm.c:468 [opt]
    frame #25: 0x0000000109206f97 spec-runner`mrb_funcall_argv(mrb=<unavailable>, self=<unavailable>, mid=<unavailable>, argc=<unavailable>, argv=<unavailable>) at vm.c:483:10 [opt]
    frame #26: 0x00000001091fd74d spec-runner`mrb_protect(mrb=0x00007fd8db80b200, body=(spec-runner`_$LT$artichoke_backend..sys..protect..Funcall$u20$as$u20$artichoke_backend..sys..protect..Protect$GT$::run::h2ce4719f669f7758 at protect.rs:72), data=mrb_value @ 0x00007fe4a07ca980, state="") at exception.c:17:14 [opt]
    frame #27: 0x00000001090e8412 spec-runner`artichoke_backend::artichoke::Artichoke::with_ffi_boundary::hce402f0b29429bc3 at protect.rs:46:17 [opt]
    frame #28: 0x00000001090e83c5 spec-runner`artichoke_backend::artichoke::Artichoke::with_ffi_boundary::hce402f0b29429bc3 at protect.rs:16 [opt]
    frame #29: 0x00000001090e83c5 spec-runner`artichoke_backend::artichoke::Artichoke::with_ffi_boundary::hce402f0b29429bc3 [inlined] _$LT$artichoke_backend..value..Value$u20$as$u20$artichoke_core..value..Value$GT$::funcall::_$u7b$$u7b$closure$u7d$$u7d$::hb207374a278bc0e3(mrb=0x00007fd8db80b200) at value.rs:161 [opt]
    frame #30: 0x00000001090e8371 spec-runner`artichoke_backend::artichoke::Artichoke::with_ffi_boundary::hce402f0b29429bc3(self=0x00007ffee6c478c0, func=<unavailable>) at artichoke.rs:99 [opt]
    frame #31: 0x0000000109120d28 spec-runner`_$LT$artichoke_backend..value..Value$u20$as$u20$artichoke_core..value..Value$GT$::funcall::h64846a7101d5ea42(self=<unavailable>, interp=0x00007ffee6c478c0, func="run_specs", args=size=1, block=Option<artichoke_backend::value::Value> @ 0x00007ffee6c46958) at value.rs:160:13 [opt]
    frame #32: 0x0000000109074162 spec-runner`spec_runner::mspec::run::h2c7938e394cc01d7(interp=0x00007ffee6c478c0, formatter=<unavailable>, specs=Map<core::slice::iter::Iter<alloc::string::String>, fn(&alloc::string::String) -> &str> @ 0x00007fe4a07f8eb0) at mspec.rs:92:18 [opt]
    frame #33: 0x0000000109070202 spec-runner`spec_runner::main::h0c05aaf15d13e44b at main.rs:215:24 [opt]
    frame #34: 0x000000010906f7d1 spec-runner`spec_runner::main::h0c05aaf15d13e44b at main.rs:160 [opt]
    frame #35: 0x00000001090840ca spec-runner`std::sys_common::backtrace::__rust_begin_short_backtrace::he501278bd57a7322 [inlined] core::ops::function::FnOnce::call_once::hd6e23e3efb3747ca((null)=<unavailable>) at function.rs:227:5 [opt]
    frame #36: 0x00000001090840c8 spec-runner`std::sys_common::backtrace::__rust_begin_short_backtrace::he501278bd57a7322(f=<unavailable>) at backtrace.rs:125 [opt]
    frame #37: 0x00000001090840ec spec-runner`std::rt::lang_start::_$u7b$$u7b$closure$u7d$$u7d$::hbab6f1e7fea35939 at rt.rs:49:18 [opt]
    frame #38: 0x0000000109300171 spec-runner`std::rt::lang_start_internal::h4428f22d05a79c62 [inlined] core::ops::function::impls::_$LT$impl$u20$core..ops..function..FnOnce$LT$A$GT$$u20$for$u20$$RF$F$GT$::call_once::h7adc4e20a318e389 at function.rs:259:13 [opt]
    frame #39: 0x000000010930016d spec-runner`std::rt::lang_start_internal::h4428f22d05a79c62 [inlined] std::panicking::try::do_call::h687af85ae86a6e14 at panicking.rs:401 [opt]
    frame #40: 0x000000010930016d spec-runner`std::rt::lang_start_internal::h4428f22d05a79c62 [inlined] std::panicking::try::hf74f2790da0186f3 at panicking.rs:365 [opt]
    frame #41: 0x000000010930016d spec-runner`std::rt::lang_start_internal::h4428f22d05a79c62 [inlined] std::panic::catch_unwind::hd14a420ea313edb8 at panic.rs:434 [opt]
    frame #42: 0x000000010930016d spec-runner`std::rt::lang_start_internal::h4428f22d05a79c62 at rt.rs:34 [opt]
    frame #43: 0x0000000109070659 spec-runner`main + 41
    frame #44: 0x00007fff204c0f3d libdyld.dylib`start + 1
(lldb) frame select 0
frame #0: 0x00000001091d1a4d spec-runner`gc_mark_children(mrb=0x00007fd8db80b200, gc=<unavailable>, obj=0x00007fd8c0092dd0) at gc.c:751:9 [opt]
   748 	      mrb_value *p = ARY_PTR(a);
   749
   750 	      for (i=0; i<e; i++) {
-> 751 	        mrb_gc_mark_value(mrb, p[i]);
   752 	      }
   753 	    }
   754 	    break;
(lldb) frame select 1
frame #1: 0x00000001091d0c83 spec-runner`incremental_gc at gc.c:1072:5 [opt]
   1069	  while (gc->gray_list && tried_marks < limit) {
   1070	    struct RBasic *obj = gc->gray_list;
   1071	    gc->gray_list = obj->gcnext;
-> 1072	    gc_mark_children(mrb, gc, obj);
   1073	    tried_marks += gc_gray_counts(mrb, gc, obj);
   1074	  }
   1075
(lldb) frame select 2
frame #2: 0x00000001091d0c53 spec-runner`incremental_gc(mrb=<unavailable>, gc=0x00007fd8db80b2b8, limit=2000) at gc.c:1188 [opt]
   1185	    return 0;
   1186	  case MRB_GC_STATE_MARK:
   1187	    if (gc->gray_list) {
-> 1188	      return incremental_marking_phase(mrb, gc, limit);
   1189	    }
   1190	    else {
   1191	      final_marking_phase(mrb, gc);

@lopopolo lopopolo added E-hard Call for participation: Experience needed to fix: Hard / a lot. E-help-wanted Call for participation: Help is requested to fix this issue. labels Aug 17, 2021
@lopopolo lopopolo changed the title Segmentation fault in when allocating an Array in mrb_send_f Segmentation fault in when marking Array children in incremental GC Aug 17, 2021
This was referenced Aug 18, 2021
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lopopolo added a commit that referenced this issue Aug 20, 2021
@lopopolo
Push a GitHub Actions workflow to reproduce #1325 in CI
ab7b3aa
@lopopolo lopopolo mentioned this issue Aug 21, 2021
Merged
lopopolo added a commit that referenced this issue Aug 21, 2021
@lopopolo
Push a GitHub Actions workflow to reproduce #1325 in CI
4d5024b
lopopolo added a commit that referenced this issue Aug 21, 2021
@lopopolo
Push a GitHub Actions workflow to reproduce #1325 in CI
e89e6d9
lopopolo added a commit that referenced this issue Aug 21, 2021
@lopopolo
Push a GitHub Actions workflow to reproduce #1325 in CI
e7d7131
lopopolo added a commit that referenced this issue Aug 21, 2021
@lopopolo
Push a GitHub Actions workflow to reproduce #1325 in CI
2e731ff
lopopolo added a commit that referenced this issue Aug 21, 2021
@lopopolo
Push a GitHub Actions workflow to reproduce #1325 in CI
9551978
lopopolo added a commit that referenced this issue Aug 21, 2021
@lopopolo
Push a GitHub Actions workflow to reproduce #1325 in CI
918d409
lopopolo added a commit that referenced this issue Sep 6, 2021
@lopopolo
Push a GitHub Actions workflow to reproduce #1325 in CI
e1eea71
lopopolo added a commit that referenced this issue Sep 18, 2021
@lopopolo
Push a GitHub Actions workflow to reproduce #1325 in CI
09aa0d1 
Now that the Pernosco integration is known to be working as tested in
the PR #1346, merge the workflow so we can generate reproduction
environments for future crashes.

Pernosco is enabled via environment variable on the runs of the
`spec-runner`.

This commit cherry-picks and squashes a couple of commits from #1346:

- e1eea71
- 91bc825

Closes #1346.
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A-security Area: Security vulnerabilities and unsoundness issues. A-vm Area: Interpreter VM implementations. B-mruby Backend: Implementation of artichoke-core using mruby. E-hard Call for participation: Experience needed to fix: Hard / a lot. E-help-wanted Call for participation: Help is requested to fix this issue.
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Disable mruby generational GC artichoke/artichoke
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