[Bug c++/84663] [6/7/8 Regression] internal compiler error: tree check: expected array_type, have error_mark in cp_complete_array_type, at cp/decl.c:8334

[mpolacek at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=84663

Marek Polacek <mpolacek at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |mpolacek at gcc dot gnu.org

--- Comment #2 from Marek Polacek <mpolacek at gcc dot gnu.org> ---
I think this should be enough:

--- a/gcc/cp/decl.c
+++ b/gcc/cp/decl.c
@@ -8323,7 +8323,7 @@ cp_complete_array_type (tree *ptype, tree initial_value,
bool do_default)
      bits.  See also complete_type which does the same thing for arrays
      of fixed size.  */
   type = *ptype;
-  if (TYPE_DOMAIN (type))
+  if (type != error_mark_node && TYPE_DOMAIN (type))
     {
       elt_type = TREE_TYPE (type);
       TYPE_NEEDS_CONSTRUCTING (type) = TYPE_NEEDS_CONSTRUCTING (elt_type);