My first fix is not enough to make test_bpo20891() reliable. A second
fix is needed and it was decided to not backport it, so remove the
test instead.
For Python 3.6, the workaround is to call PyEval_InitThreads() before
spawning the first C thread.
Python 3.7 will have both fixes.
When PyGILState_Ensure() is called in a non-Python thread before
PyEval_InitThreads(), only call PyEval_InitThreads() after calling
PyThreadState_New() to fix a crash.
Add an unit test in test_embed.
Enhance also embedded tests, backport from master:
* Add test_pre_initialization_api()
* Set PYTHONIOENCODING environment variable in
test_forced_io_encoding()
(cherry picked from commit b4d1e1f7c1)
bootstrap files:
Could not find platform dependent libraries <exec_prefix
Consider setting $PYTHONHOME to <prefix>[:<exec_prefix>]
Patch by Xiang Zhang
Issue #26516:
* Add PYTHONMALLOC environment variable to set the Python memory
allocators and/or install debug hooks.
* PyMem_SetupDebugHooks() can now also be used on Python compiled in release
mode.
* The PYTHONMALLOCSTATS environment variable can now also be used on Python
compiled in release mode. It now has no effect if set to an empty string.
* In debug mode, debug hooks are now also installed on Python memory allocators
when Python is configured without pymalloc.
Victor Stinner
Steve Dower
Ned Deily
Martin Panter
Eric Snow
Serhiy Storchaka
Berker Peksag
Nick Coghlan