1 files changed, 6 insertions, 0 deletions
diff --git a/gcc/c/c-decl.c b/gcc/c/c-decl.c
index 8170a80..f7ae648 100644
--- a/gcc/c/c-decl.c
+++ b/gcc/c/c-decl.c
@@ -7210,6 +7210,12 @@ finish_struct (location_t loc, tree t, tree fieldlist, tree attributes,
 
   layout_type (t);
 
+  if (TYPE_SIZE_UNIT (t)
+      && TREE_CODE (TYPE_SIZE_UNIT (t)) == INTEGER_CST
+      && !TREE_OVERFLOW (TYPE_SIZE_UNIT (t))
+      && !valid_constant_size_p (TYPE_SIZE_UNIT (t)))
+    error ("type %qT is too large", t);
+
   /* Give bit-fields their proper types.  */
   {
     tree *fieldlistp = &fieldlist;