STINNER Victor <[email protected]> added the comment:
Failing assertion:
/* The stack of exception states should contain just this thread. */
assert(tstate->exc_info->previous_item == NULL);
"test_multiprocessing_fork passed in 9 min 13 sec"
Oh. A child process crashed on "self.pid = os.fork()" in
"/Lib/multiprocessing/popen_fork.py", line 70 in _launch", but the test still
pass.
os.fork() calls PyOS_AfterFork_Child() which starts by calling
_PyGILState_Reinit() which ends with
"_PyThreadState_DeleteExcept(current_tstate);".
_PyThreadState_DeleteExcept() creates a "garbage" list of thread states, and
then call PyThreadState_Clear() on each thread. Finally, one call to
PyThreadState_Clear() fails on the assertion.
I'm not sure that the assertion takes in account the case of specific case of
fork().
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<https://bugs.python.org/issue33612>
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