[Bug c++/67581] [6 Regression] ICE on transparent union with -g enabled on x86_64-linux-gnu (verify_type failed)

[hubicka at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=67581

Jan Hubicka <hubicka at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|NEW                         |ASSIGNED
           Assignee|unassigned at gcc dot gnu.org      |hubicka at gcc dot 
gnu.org

--- Comment #2 from Jan Hubicka <hubicka at gcc dot gnu.org> ---
The following should fix it:
Index: c-family/c-common.c
===================================================================
--- c-family/c-common.c (revision 230924)
+++ c-family/c-common.c (working copy)
@@ -7787,7 +7787,8 @@ handle_transparent_union_attribute (tree
    *node = type = build_duplicate_type (type);
  }

-      TYPE_TRANSPARENT_AGGR (type) = 1;
+      for (tree t = TYPE_MAIN_VARIANT (type); t; t = TYPE_NEXT_VARIANT (t))
+        TYPE_TRANSPARENT_AGGR (t) = 1;
       return NULL_TREE;
     }

Index: testsuite/g++.dg/torture/pr67581.C
===================================================================
--- testsuite/g++.dg/torture/pr67581.C (revision 0)
+++ testsuite/g++.dg/torture/pr67581.C (revision 0)
@@ -0,0 +1,6 @@
+/* { dg-do compile } */
+union U 
+{
+  int x; 
+  float y;
+} __attribute__ ((__transparent_union__));