STINNER Victor <vstin...@redhat.com> added the comment:
Oops, it's my fault! PR 15415 fix the crash.
The regression was introduced by:
commit 74f6568bbd3e70806ea3219e8bacb386ad802ccf
Author: Victor Stinner <vstin...@redhat.com>
Date: Fri Mar 15 15:08:05 2019 +0100
bpo-36301: Add _PyWstrList structure (GH-12343)
Simplified change:
- static wchar_t *empty_argv[1] = {L""};
+ wchar_t* empty_argv[1] = {L""};
It's a deliberate change to not waste memory: PySys_SetArgvEx()
(make_sys_argv()) is only called once, whereas static keeps the memory for the
whole lifecycle of the process.
But I didn't notice a subtle issue with memory allocated on the stack: the code
works well with gcc -O0! The bug only triggers with gcc -O3.
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<https://bugs.python.org/issue37926>
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