[Bug c++/84541] ICE with auto in function parameter

[reichelt at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=84541

--- Comment #2 from Volker Reichelt <reichelt at gcc dot gnu.org> ---
Paolo, you're right. Sorry for the noise.

The "-fconcept" parameter is a left-over from the larger testcase where this
snippet was derived from.

The ICE can be reproduced with GCC 4.9.0 and only needs "-std=c++14" or
"-std=c++1y" to be triggered.