[Bug stdio/31841] Dead-lock on exit() -> _IO_flush_all() with pending read() from stdin

[fweimer at redhat dot com]

https://sourceware.org/bugzilla/show_bug.cgi?id=31841

--- Comment #4 from Florian Weimer <fweimer at redhat dot com> ---
(In reply to Max Wittal from comment #3)
> Created attachment 15561 [details]
> Testcase for _IO_un_link() dead-lock
> 
> Dead-locks on both 2.39 and 2.31 (Ubuntu 20.04). This is a different issue
> now than originally reported. I found this while debugging the original
> issue which seems to be new expected behavior.

This test case does not look valid to me because of the concurrent fclose
(stdin) and getchar ().

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