After my build I have the following:

$ ./python -m test.pythoninfo|grep -E 'CFLAGS|CC|OPT|LDFLAGS'
Objects/genobject.c:127: _PyObject_GC_TRACK: Assertion "!(((PyGC_Head
*)(op)-1)->_gc_next != 0)" failed: object already tracked by the garbage
collector
Enable tracemalloc to get the memory block allocation traceback

object address  : 30084150
object refcount : 0
object type     : 20013710
object type name: generator
object repr     : <refcnt 0 at 30084150>

Fatal Python error: _PyObject_AssertFailed: _PyObject_AssertFailed
Python runtime state: core initialized

Current thread 0x00000001 (most recent call first):
  File "<frozen importlib._bootstrap_external>", line 1593 in _setup
  File "<frozen importlib._bootstrap_external>", line 1634 in _install
  File "<frozen importlib._bootstrap>", line 1189 in
_install_external_importers
ksh: 22151670 IOT/Abort trap(coredump)

See attached file for the script capture.

On 11/04/2020 15:13, Batuhan Taskaya wrote:
> Batuhan Taskaya <batuhanosmantaskaya@gmail.com> added the comment:
>
> I've just compiled python with (xlc 16.1.0, debug build) and can't experience that compile failure, can you give a specific spot that failure happens?
>
> -bash-4.4$ ./python -m test.pythoninfo|grep -E 'CFLAGS|CC|OPT|LDFLAGS'
> sysconfig[CC]: /opt/IBM/xlc/16.1.0/bin/xlc_r
> sysconfig[CFLAGS]: -DNDEBUG -O
> sysconfig[CONFIG_ARGS]: 'CC=/opt/IBM/xlc/16.1.0/bin/xlc_r'
> sysconfig[OPT]: -DNDEBUG -O
> sysconfig[PY_CFLAGS]: -DNDEBUG -O
> sysconfig[PY_CFLAGS_NODIST]: -I./Include/internal
> sysconfig[PY_STDMODULE_CFLAGS]: -DNDEBUG -O -I./Include/internal -I. -I./Include
>
> ----------
>
> _______________________________________
> Python tracker <report@bugs.python.org>
> <https://bugs.python.org/issue40244>
> _______________________________________
>