https://gcc.gnu.org/bugzilla/show_bug.cgi?id=77617
Markus Trippelsdorf <trippels at gcc dot gnu.org> changed: What |Removed |Added ---------------------------------------------------------------------------- Status|UNCONFIRMED |RESOLVED CC| |trippels at gcc dot gnu.org Resolution|--- |INVALID --- Comment #2 from Markus Trippelsdorf <trippels at gcc dot gnu.org> --- The &= operator has the same precedence as the ternary operator. So you have to use parentheses in this case.