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This fix corrects an issue found in the `dockerized(pedantic, fedora)` CI build, first appearing after the introduction of a new version of the Fedora docker image version. This image includes a version of `glibc` with the attribute `__attr_access_none` added to `pthread_setspecific` [1], the implementation of which only exists for GCC 11.X - the version included in the Fedora image. The attribute requires that the pointer provided in the second argument of `pthread_getspecific` must, if not NULL, be a pointer to a valid object. In the usage in `async_die_is_recursing`, `(void *)1` is not valid, causing the error. This fix imitates a workaround added in SELinux [2] by using the pointer to the static `async_die_counter` itself as the second argument to `pthread_setspecific`. This guaranteed non-NULL, valid pointer matches the intent of the current usage while not triggering the build error. [1] https://sourceware.org/git/?p=glibc.git;a=commitdiff;h=a1561c3bbe8 [2] https://lore.kernel.org/all/20211021140519.6593-1-cgzones@googlemail.com/ Co-authored-by: Johannes Schindelin <johannes.schindelin@gmx.de> Signed-off-by: Victoria Dye <vdye@github.com> Acked-by: Jeff King <peff@peff.net> Signed-off-by: Junio C Hamano <gitster@pobox.com>
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GIT - the stupid content tracker
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