OK.
On Sun, Aug 12, 2018 at 4:53 AM, Marek Polacek <pola...@redhat.com> wrote:
> This fixes ICE-on-invalid with an array of auto. The problem was that
> create_array_type_for_decl got null name, so the error call crashed. We
> need to handle this case as elsewhere in the function.
>
> Bootstrapped/regtested on x86_64-linux, ok for trunk?
>
> 2018-08-11 Marek Polacek <pola...@redhat.com>
>
> PR c++/86915
> * decl.c (create_array_type_for_decl): Handle null name.
>
> * g++.dg/diagnostic/auto1.C: New test.
>
> --- gcc/cp/decl.c
> +++ gcc/cp/decl.c
> @@ -9838,7 +9838,10 @@ create_array_type_for_decl (tree name, tree type, tree
> size)
> type-specifier, the program is ill-formed. */
> if (type_uses_auto (type))
> {
> - error ("%qD declared as array of %qT", name, type);
> + if (name)
> + error ("%qD declared as array of %qT", name, type);
> + else
> + error ("creating array of %qT", type);
> return error_mark_node;
> }
>
> --- gcc/testsuite/g++.dg/diagnostic/auto1.C
> +++ gcc/testsuite/g++.dg/diagnostic/auto1.C
> @@ -0,0 +1,4 @@
> +// PR c++/86915
> +// { dg-do compile { target c++17 } }
> +
> +template<auto [1]> struct S; // { dg-error "creating array of .auto." }
