[Bug libbacktrace/87653] Calling null pointer in multi-threaded applications

[ian at airs dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87653

--- Comment #1 from Ian Lance Taylor <ian at airs dot com> ---
Created attachment 44860
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=44860&action=edit
Possible patch

I can't recreate the problem.  Your test program runs fine on my system, once I
add a main function that calls main_test_loop.  If you can recreate the problem
consistently, can you see if this patch fixes it?  Thanks.