[Bug c++/80241] [5/6/7 Regression] Broken error message + ICE with invalid attribute

[mpolacek at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=80241

--- Comment #3 from Marek Polacek <mpolacek at gcc dot gnu.org> ---
Author: mpolacek
Date: Tue Apr 18 09:38:55 2017
New Revision: 246963

URL: https://gcc.gnu.org/viewcvs?rev=246963&root=gcc&view=rev
Log:
        PR c++/80241 - ICE with alignas pack expansion.
        * error.c (dump_expr): Handle TREE_LIST.
        * parser.c (cp_parser_std_attribute_list): Return error_mark if
        make_pack_expansion returns an error.

        * g++.dg/cpp0x/alignas11.C: New test.

Added:
    trunk/gcc/testsuite/g++.dg/cpp0x/alignas11.C
Modified:
    trunk/gcc/cp/ChangeLog
    trunk/gcc/cp/error.c
    trunk/gcc/cp/parser.c
    trunk/gcc/testsuite/ChangeLog