[Bug c++/80296] Broken diagnostic 'unary_plus_expr' not supported by expression

[reichelt at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=80296

--- Comment #2 from Volker Reichelt <reichelt at gcc dot gnu.org> ---
Patch at https://gcc.gnu.org/ml/gcc-patches/2017-04/msg00111.html