https://gcc.gnu.org/bugzilla/show_bug.cgi?id=61978
--- Comment #4 from Kostya Serebryany <kcc at gcc dot gnu.org> --- Note that the blacklist can not disable the checking inside the memcmp interceptor. But it will disable instrumenting globals in QT, so if this is a global from QT (you did not post the full log) you will not see the error.