https://gcc.gnu.org/bugzilla/show_bug.cgi?id=67863
Marek Polacek <mpolacek at gcc dot gnu.org> changed: What |Removed |Added ---------------------------------------------------------------------------- Status|UNCONFIRMED |NEW Last reconfirmed| |2015-10-06 Ever confirmed|0 |1 --- Comment #1 from Marek Polacek <mpolacek at gcc dot gnu.org> --- And because of the missing location in cc1plus this 1911 /* Don't warn for various macro expansions. */ 1912 if (from_macro_expansion_at (loc) 1913 || from_macro_expansion_at (EXPR_LOCATION (lhs)) 1914 || from_macro_expansion_at (EXPR_LOCATION (rhs))) 1915 return; doesn't trigger so we warn.