[Bug c++/84423] [6/7/8/9 Regression] [concepts] ICE with invalid using declaration

[paolo at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=84423

--- Comment #6 from paolo at gcc dot gnu.org <paolo at gcc dot gnu.org> ---
Author: paolo
Date: Tue Oct  9 21:16:09 2018
New Revision: 264996

URL: https://gcc.gnu.org/viewcvs?rev=264996&root=gcc&view=rev
Log:
/cp
2018-10-09  Paolo Carlini  <paolo.carlini@oracle.com>

        PR c++/84423
        * pt.c (convert_template_argument): Immediately return error_mark_node
        if the second argument is erroneous.
        * parser.c (cp_parser_type_id): Add location_t * parameter.
        (cp_parser_type_id_1): Likewise.
        (cp_parser_alias_declaration): Adjust cp_parser_type_id call,
        obtain the location of the type and save it.
        (cp_parser_template_type_arg): Adjust.
        (cp_parser_trailing_type_id): Likewise.
        * decl.c (grokdeclarator): Improve error message for 'auto' in
        alias declaration.

/testsuite
2018-10-09  Paolo Carlini  <paolo.carlini@oracle.com>

        PR c++/84423
        * g++.dg/concepts/pr84423-1.C: New.
        * g++.dg/concepts/pr84423-2.C: Likewise.
        * g++.dg/cpp0x/auto39.C: Test location too.
        * g++.dg/cpp0x/auto9.C: Likewise.
        * g++.dg/cpp1y/pr60384.C: Likewise.

Added:
    trunk/gcc/testsuite/g++.dg/concepts/pr84423-1.C
    trunk/gcc/testsuite/g++.dg/concepts/pr84423-2.C
Modified:
    trunk/gcc/cp/ChangeLog
    trunk/gcc/cp/decl.c
    trunk/gcc/cp/parser.c
    trunk/gcc/cp/pt.c
    trunk/gcc/testsuite/ChangeLog
    trunk/gcc/testsuite/g++.dg/cpp0x/auto39.C
    trunk/gcc/testsuite/g++.dg/cpp0x/auto9.C
    trunk/gcc/testsuite/g++.dg/cpp1y/pr60384.C