[Bug c++/84801] [8 Regression] ICE: Segmentation fault instead of "error: parameter packs not expanded with '...'"

[jason at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=84801

--- Comment #2 from Jason Merrill <jason at gcc dot gnu.org> ---
Author: jason
Date: Thu Mar 15 03:49:07 2018
New Revision: 258548

URL: https://gcc.gnu.org/viewcvs?rev=258548&root=gcc&view=rev
Log:
        PR c++/84801 - ICE with unexpanded pack in lambda.

        We avoid complaining about unexpanded packs when inside a lambda,
        since the lambda as a whole could be part of a pack expansion.
        But that can only be true if the lambda is in a template context.

        * pt.c (check_for_bare_parameter_packs): Don't return early for a
        lambda in non-template context.

Added:
    trunk/gcc/testsuite/g++.dg/cpp1y/lambda-generic-variadic15.C
Modified:
    trunk/gcc/cp/ChangeLog
    trunk/gcc/cp/pt.c