[Bug c++/98538] [11 Regression] ICE in cp_build_qualified_type_real, at cp/tree.c:1335

[mpolacek at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=98538

--- Comment #4 from Marek Polacek <mpolacek at gcc dot gnu.org> ---
Oops, I hadn't noticed that this PR has an assignee, since it's still in NEW. 
Anyway, this was my patch:

--- a/gcc/cp/tree.c
+++ b/gcc/cp/tree.c
@@ -1341,7 +1341,9 @@ cp_build_qualified_type_real (tree type,
       if (!t)
    {
      gcc_checking_assert (TYPE_DEPENDENT_P_VALID (type)
-                  || !dependent_type_p (type));
+                  || !dependent_type_p (type)
+                  || dependent_alias_template_spec_p (type,
+                                  nt_opaque));
      t = build_cplus_array_type (element_type, TYPE_DOMAIN (type),
                      TYPE_DEPENDENT_P (type));