https://gcc.gnu.org/bugzilla/show_bug.cgi?id=115501
Andrew Pinski <pinskia at gcc dot gnu.org> changed:
What |Removed |Added
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CC| |pinskia at gcc dot gnu.org
--- Comment #7 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
(In reply to Marek Polacek from comment #6)
> build_dynamic_cast_1 now calls pushdecl which calls duplicate_decls and that
> emits the "conflicting declaration" error and returns error_mark_node, so
> the subsequent build_cxx_call crashes on the error_mark_node.
>
> Maybe we need just:
>
> --- a/gcc/cp/rtti.cc
> +++ b/gcc/cp/rtti.cc
> @@ -793,6 +793,8 @@ build_dynamic_cast_1 (location_t loc, tree type, tree
> expr,
> dcast_fn = pushdecl (dcast_fn, /*hiding=*/true);
> pop_abi_namespace (flags);
> dynamic_cast_node = dcast_fn;
> + if (dcast_fn == error_mark_node)
> + return error_mark_node;
> }
> result = build_cxx_call (dcast_fn, 4, elems, complain);
> SET_EXPR_LOCATION (result, loc);
Most likely that check should be after the `!dcast_fn` check rather than inside
it so if you try to use dynamic_cast twice, the second one would not cause an
ICE.
