Merge jdk

src/jdk.compiler/share/classes/com/sun/tools/javac/comp/Lower.java

@@ -3556,7 +3556,7 @@ private void visitIterableForeachLoop(JCEnhancedForLoop tree) {
                                            names.iterator,
                                            tree.expr.type,
                                            List.nil());
-            Assert.check(types.isSameType(types.erasure(types.asSuper(iterator.type.getReturnType(), syms.iteratorType.tsym)), types.erasure(syms.iteratorType)));
+            Assert.check(types.isSameType(types.erasure(types.asSuper(iterator.type.getReturnType().referenceProjectionOrSelf(), syms.iteratorType.tsym)), types.erasure(syms.iteratorType)));
             VarSymbol itvar = new VarSymbol(SYNTHETIC, names.fromString("i" + target.syntheticNameChar()),
                                             types.erasure(syms.iteratorType),
                                             currentMethodSym);