OK.
On Tue, Mar 27, 2018 at 4:52 AM, Jakub Jelinek <ja...@redhat.com> wrote:
> Hi!
>
> Both build_{reference,pointer}_type start with if (to_type ==
> error_mark_node) return error_mark_node;
>
> cp_build_reference_type uses build_reference_type, so in many cases it will
> just return error_mark_node if it is passed, but if rval is true, it will
> assume build_reference_type returned some REFERENCE_TYPE instead.
>
> Fixed thusly, bootstrapped/regtested on x86_64-linux and i686-linux, ok for
> trunk?
>
> 2018-03-27 Jakub Jelinek <ja...@redhat.com>
>
> PR c++/85076
> * tree.c (cp_build_reference_type): If to_type is error_mark_node,
> return it right away.
>
> * g++.dg/cpp1y/pr85076.C: New test.
>
> --- gcc/cp/tree.c.jj 2018-03-21 21:18:31.738351376 +0100
> +++ gcc/cp/tree.c 2018-03-26 11:22:47.067967708 +0200
> @@ -1078,6 +1078,9 @@ cp_build_reference_type (tree to_type, b
> {
> tree lvalue_ref, t;
>
> + if (to_type == error_mark_node)
> + return error_mark_node;
> +
> if (TREE_CODE (to_type) == REFERENCE_TYPE)
> {
> rval = rval && TYPE_REF_IS_RVALUE (to_type);
> --- gcc/testsuite/g++.dg/cpp1y/pr85076.C.jj 2018-03-26 11:26:55.725047985
> +0200
> +++ gcc/testsuite/g++.dg/cpp1y/pr85076.C 2018-03-26 11:26:41.807043494
> +0200
> @@ -0,0 +1,6 @@
> +// PR c++/85076
> +// { dg-do compile { target c++14 } }
> +
> +template<typename> struct A*; // { dg-error "expected unqualified-id
> before" }
> +
> +auto a = [](A<auto>) {}; // { dg-error "is not a template|has
> incomplete type" }
>
> Jakub
