Ping.
On Mon, Dec 05, 2016 at 09:37:30PM +0100, Marek Polacek wrote:
> We were crashing on this invalid test because cp_parser_std_attribute_spec_seq
> in cp_parser_statement returned error_mark_node, but the subsequent
> attribute_fallthrough_p wasn't prepared for that.
>
> Bootstrapped/regtested on x86_64-linux, ok for trunk?
>
> 2016-12-05 Marek Polacek <pola...@redhat.com>
>
> PR c++/78647
> * c-family/c-common.c (attribute_fallthrough_p): Return false for
> error_mark_node.
>
> * g++.dg/parse/error58.C: New.
>
> diff --git gcc/c-family/c-common.c gcc/c-family/c-common.c
> index 0749361..c8e1f0d 100644
> --- gcc/c-family/c-common.c
> +++ gcc/c-family/c-common.c
> @@ -5558,6 +5558,8 @@ parse_optimize_options (tree args, bool attr_p)
> bool
> attribute_fallthrough_p (tree attr)
> {
> + if (attr == error_mark_node)
> + return false;
> tree t = lookup_attribute ("fallthrough", attr);
> if (t == NULL_TREE)
> return false;
> diff --git gcc/testsuite/g++.dg/parse/error58.C
> gcc/testsuite/g++.dg/parse/error58.C
> index e69de29..5ed6e1e 100644
> --- gcc/testsuite/g++.dg/parse/error58.C
> +++ gcc/testsuite/g++.dg/parse/error58.C
> @@ -0,0 +1,7 @@
> +// PR c++/78647
> +// { dg-do compile { target c++11 } }
> +// { dg-options "-w" }
> +
> +struct A;
> +void foo ();
> +void f() { alignas (foo (A)); } // { dg-error "expected" "" }
>
> Marek
Marek
