[Bug testsuite/80551] c-c++-common/tsan/race_on_mutex.c fails on powerpc

[marxin at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=80551

--- Comment #6 from Martin Liška <marxin at gcc dot gnu.org> ---
(In reply to Segher Boessenkool from comment #5)
> Why disable it?  Can the feature not work, can the test not work?
> 
> Disabling the test is papering over the problem as far as I see.

The test does not work :) So should we generalize more the scanned back-trace
in order to survive '#1 <null> <null>' ?