[Bug c++/88187] ICE on (invalid) C++ code when compiled with -std=c++17: Segmentation fault

[jakub at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=88187

--- Comment #2 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
With
--- gcc/cp/decl.c.jj    2018-11-17 00:16:41.000000000 +0100
+++ gcc/cp/decl.c       2018-11-26 11:18:30.518620651 +0100
@@ -11276,7 +11276,7 @@ grokdeclarator (const cp_declarator *dec
                    if (!tmpl)
                      if (tree late_auto = type_uses_auto (late_return_type))
                        tmpl = CLASS_PLACEHOLDER_TEMPLATE (late_auto);
-                   if (tmpl)
+                   if (tmpl && inner_declarator)
                      {
                        if (!dguide_name_p (unqualified_id))
                          {
it is rejected as before (e.g. in gcc 8) in -std=c++17 mode with
error: ‘auto’ parameter not permitted in this context