https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86153
Jonathan Wakely <redi at gcc dot gnu.org> changed: What |Removed |Added ---------------------------------------------------------------------------- CC| |msebor at gcc dot gnu.org --- Comment #1 from Jonathan Wakely <redi at gcc dot gnu.org> --- It seems unfortunate that _M_default_append is no longer inlined, but the function was incorrect and had to be changed. I don't know enough about the failing test to know what can or should be done to fix it.