===================================================================
@@ -449,6 +449,17 @@ perform_member_init (tree member, tree i
if (decl == error_mark_node)
return;
+ if (warn_uninitialized && init && TREE_CODE (init) == TREE_LIST
+ && TREE_CHAIN (init) == NULL_TREE)
+ {
+ tree val = TREE_VALUE (init);
+ if (TREE_CODE (val) == COMPONENT_REF && TREE_OPERAND (val, 1) == member
+ && TREE_OPERAND (val, 0) == current_class_ref)
+ warning_at (DECL_SOURCE_LOCATION (current_function_decl),
+ OPT_Wuninitialized, "%qD is initialized with itself",
+ member);
+ }
+
if (init == void_type_node)
{
/* mem() means value-initialization. */
===================================================================
@@ -0,0 +1,11 @@
+/* { dg-do compile } */
+/* { dg-options "-Wuninitialized" } */
+
+class X {
+ int i;
+ X() : i(i) { } // { dg-warning "initialized with itself" }
+ X(int i) : i(i) { }
+ X(const X& x) : i(x.i) { }
+};
+
+// { dg-prune-output "In constructor" }