free() error after CZoneInfoDatetimeSubclassTest[test_folds_from_utc]

[bnavigator]

This is inside a openSUSE build service environment for building the rpm package:

abuild@skylab:~> cd rpmbuild/BUILD/zoneinfo-0.2.1/
abuild@skylab:~/rpmbuild/BUILD/zoneinfo-0.2.1> export PYTHONPATH=/home/abuild/rpmbuild/BUILDROOT/python-backports.zoneinfo-0.2.1-0.x86_64/usr/lib64/python3.8/site-packages/
abuild@skylab:~/rpmbuild/BUILD/zoneinfo-0.2.1> gdb python3
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Reading symbols from python3...
Reading symbols from /usr/lib/debug/usr/bin/python3.8-3.8.12-5.7.x86_64.debug...
(gdb) run -m pytest
Starting program: /usr/bin/python3 -m pytest
Download failed: No route to host.  Continuing without debug info for /home/abuild/rpmbuild/BUILD/zoneinfo-0.2.1/system-supplied DSO at 0x7ffff7fc1000.
[Thread debugging using libthread_db enabled]
Using host libthread_db library "/lib64/libthread_db.so.1".
Download failed: No route to host.  Continuing without debug info for /lib64/libbz2.so.1.
Download failed: No route to host.  Continuing without debug info for /lib64/liblzma.so.5.
[Detaching after fork from child process 1041]
Download failed: No route to host.  Continuing without debug info for /lib64/libuuid.so.1.
Download failed: No route to host.  Continuing without debug info for /lib64/libmpdec.so.3.
Download failed: No route to host.  Continuing without debug info for /lib64/libexpat.so.1.
========================================================================================================== test session starts ===========================================================================================================
platform linux -- Python 3.8.12, pytest-6.2.5, py-1.11.0, pluggy-1.0.0
rootdir: /home/abuild/rpmbuild/BUILD/zoneinfo-0.2.1
plugins: hypothesis-6.39.4, subtests-0.5.0
collecting ... Download failed: No route to host.  Continuing without debug info for /lib64/libssl.so.1.1.
Download failed: No route to host.  Continuing without debug info for /lib64/libcrypto.so.1.1.
Download failed: No route to host.  Continuing without debug info for /home/abuild/rpmbuild/BUILDROOT/python-backports.zoneinfo-0.2.1-0.x86_64/usr/lib64/python3.8/site-packages/backports/zoneinfo/_czoneinfo.cpython-38-x86_64-linux-gnu.so.
Missing separate debuginfo for /home/abuild/rpmbuild/BUILDROOT/python-backports.zoneinfo-0.2.1-0.x86_64/usr/lib64/python3.8/site-packages/backports/zoneinfo/_czoneinfo.cpython-38-x86_64-linux-gnu.so
Try: zypper install -C "debuginfo(build-id)=2fb0f9faaa06618bb6887ac49d12b82baecd91a0"
collected 233 items                                                                                                                                                                                                                      

tests/test_zoneinfo.py ............................................................................................................ssssssssssssssssssssssssss.............................................s....................... [ 87%]
.......                                                                                                                                                                                                                            [ 90%]
tests/test_zoneinfo_property.py .......................                                                                                                                                                                            [100%]

==================================================================================================== 206 passed, 27 skipped in 1.84s =====================================================================================================
free(): invalid pointer

Program received signal SIGABRT, Aborted.
__pthread_kill_implementation (threadid=<optimized out>, signo=signo@entry=6, no_tid=no_tid@entry=0) at pthread_kill.c:44
Download failed: No route to host.  Continuing without source file /usr/src/debug/glibc-2.35-4.7.x86_64/nptl/pthread_kill.c.
44      pthread_kill.c: No such file or directory.
Missing separate debuginfos, use: zypper install libbz2-1-debuginfo-1.0.8-5.75.x86_64 libexpat1-debuginfo-2.4.7-2.5.x86_64 liblzma5-debuginfo-5.2.5-4.74.x86_64 libmpdec3-debuginfo-2.5.1-3.51.x86_64 libopenssl1_1-debuginfo-1.1.1n-2.3.x86_64 libuuid1-debuginfo-2.37.4-3.5.x86_64
(gdb) bt
#0  __pthread_kill_implementation (threadid=<optimized out>, signo=signo@entry=6, no_tid=no_tid@entry=0) at pthread_kill.c:44
#1  0x00007ffff7ae61e3 in __pthread_kill_internal (signo=6, threadid=<optimized out>) at pthread_kill.c:78
#2  0x00007ffff7a96306 in __GI_raise (sig=sig@entry=6) at ../sysdeps/posix/raise.c:26
#3  0x00007ffff7a7f813 in __GI_abort () at abort.c:79
#4  0x00007ffff7ad91b7 in __libc_message (action=action@entry=do_abort, fmt=fmt@entry=0x7ffff7c1f618 "%s\n") at ../sysdeps/posix/libc_fatal.c:155
#5  0x00007ffff7af0c9c in malloc_printerr (str=str@entry=0x7ffff7c1d1f2 "free(): invalid pointer") at malloc.c:5664
#6  0x00007ffff7af2ac4 in _int_free (av=<optimized out>, p=<optimized out>, have_lock=0) at malloc.c:4439
#7  0x00007ffff7af5753 in __GI___libc_free (mem=<optimized out>) at malloc.c:3391
#8  0x00007ffff7d881e5 in _Py_DECREF (op=<optimized out>, lineno=541, filename=<synthetic pointer>) at ./Include/object.h:478
#9  _Py_XDECREF (op=<optimized out>) at ./Include/object.h:541
#10 tupledealloc (op=0x7ffff7721220) at Objects/tupleobject.c:247
#11 0x00007ffff7d98817 in _Py_DECREF (op=<optimized out>, lineno=541, filename=<synthetic pointer>) at ./Include/object.h:478
#12 _Py_XDECREF (op=<optimized out>) at ./Include/object.h:541
#13 code_dealloc (co=0x7ffff7739d40) at Objects/codeobject.c:552
#14 0x00007ffff7d957cd in _Py_DECREF (op=<optimized out>, lineno=579, filename=0x7ffff7e73631 "Objects/funcobject.c") at ./Include/object.h:478
#15 func_clear (op=0x7ffff76a29d0) at Objects/funcobject.c:579
#16 0x00007ffff7d956ba in func_dealloc (op=0x7ffff76a29d0) at Objects/funcobject.c:600
#17 0x00007ffff7d85275 in _Py_DECREF (op=<optimized out>, lineno=541, filename=<synthetic pointer>) at ./Include/object.h:478
#18 _Py_XDECREF (op=<optimized out>) at ./Include/object.h:541
#19 free_keys_object (keys=0x7ffff770ce70) at Objects/dictobject.c:584
#20 0x00007ffff7e20ff6 in type_clear (type=0x55555560d8a0) at Objects/typeobject.c:3607
#21 0x00007ffff7d7f4c9 in delete_garbage (state=0x7ffff7f97618 <_PyRuntime+344>, old=0x7ffff7f97660 <_PyRuntime+416>, collectable=0x7fffffffe4a0) at Modules/gcmodule.c:948
#22 collect (generation=2, n_collected=0x0, n_uncollectable=0x0, nofail=1, state=0x7ffff7f97618 <_PyRuntime+344>) at Modules/gcmodule.c:1123
#23 0x00007ffff7e29962 in _PyGC_CollectNoFail () at Modules/gcmodule.c:1877
#24 0x00007ffff7e28ef4 in PyImport_Cleanup () at Python/import.c:599
#25 0x00007ffff7e266c1 in Py_FinalizeEx () at Python/pylifecycle.c:1229
#26 0x00007ffff7e1d8a8 in Py_RunMain () at Modules/main.c:691
#27 0x00007ffff7df90f9 in Py_BytesMain (argc=<optimized out>, argv=<optimized out>) at Modules/main.c:743
#28 0x00007ffff7a80630 in __libc_start_call_main (main=main@entry=0x555555555140 <main>, argc=argc@entry=3, argv=argv@entry=0x7fffffffe878) at ../sysdeps/nptl/libc_start_call_main.h:58
#29 0x00007ffff7a806f0 in __libc_start_main_impl (main=0x555555555140 <main>, argc=3, argv=0x7fffffffe878, init=<optimized out>, fini=<optimized out>, rtld_fini=<optimized out>, stack_end=0x7fffffffe868) at ../csu/libc-start.c:392
#30 0x0000555555555075 in _start () at ../sysdeps/x86_64/start.S:115
(gdb) py-bt
Traceback (most recent call first):
  Garbage-collecting
(gdb) quit

If I exclude CZoneInfoDatetimeSubclassTest[test_folds_from_utc] from the pytest run, the free() error does not happen.

zoneinfo 0.2.1 with #101 and #115 applied.

[bnavigator]

Hmm, this does not happen outside of the build service virtual machine.

[Vogtinator]

Might be influenced by some of the MALLOC_* variables set inside