[issue44434] _thread module: Remove redundant PyThread_exit_thread() call to avoid glibc fatal error: libgcc_s.so.1 must be installed for pthread_cancel to work

[STINNER Victor]

STINNER Victor <vstinner at python.org> added the comment:

See also bpo-18748 "io.IOBase destructor silence I/O error on close() by default" which was caused by a bug in an application, the application closed the libgcc_s file descriptor by mistake. It closed the same file decriptor twice, whereas the FD was reused by dlopen() in the meanwhile. But the result was the same, the process aborted with this error message:

"libgcc_s.so.1 must be installed for pthread_cancel to work"

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<https://bugs.python.org/issue44434>
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