https://gcc.gnu.org/bugzilla/show_bug.cgi?id=63888
--- Comment #20 from Kostya Serebryany <kcc at gcc dot gnu.org> --- > Is this clear? This is on access of the b1 variable defined in main.c, > certainly not anything around f variable defined in libfoo.c. Yea. Thanks. Pondering... I am still not convinced that this code is good (even if it is C-standard-compliant).