test-aio-multithread.c:371:test_multi_fair_mutex: assertion failed (counter == atomic_counter): (316636 == 316637)

Intermittent failure of test-aio-multithread. This one's on the ubuntu-22.04-aarch64-alldbg job:

https://gitlab.com/qemu-project/qemu/-/jobs/6030222973

▶ 205/847 ERROR:../tests/unit/test-aio-multithread.c:371:test_multi_fair_mutex: assertion failed (counter == atomic_counter): (316636 == 316637) ERROR         
206/847 qemu:qtest+qtest-arm / qtest-arm/qmp-test                                 OK               0.70s   4 subtests passed
205/847 qemu:unit / test-aio-multithread                                          ERROR            6.45s   killed by signal 6 SIGABRT
>>> MALLOC_PERTURB_=26 G_TEST_BUILDDIR=/home/gitlab-runner/builds/E8PpwMky/0/qemu-project/qemu/build/tests/unit G_TEST_SRCDIR=/home/gitlab-runner/builds/E8PpwMky/0/qemu-project/qemu/tests/unit /home/gitlab-runner/builds/E8PpwMky/0/qemu-project/qemu/build/tests/unit/test-aio-multithread --tap -k
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stderr:
**
ERROR:../tests/unit/test-aio-multithread.c:371:test_multi_fair_mutex: assertion failed (counter == atomic_counter): (316636 == 316637)
(test program exited with status code -6)
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