--- a/langtools/src/jdk.compiler/share/classes/com/sun/tools/javac/comp/Attr.java	Tue Jan 19 15:46:42 2016 +0530
+++ b/langtools/src/jdk.compiler/share/classes/com/sun/tools/javac/comp/Attr.java	Wed Jan 20 10:50:28 2016 +0000
@@ -3873,8 +3873,6 @@
                    v.name != names._class;
         }
 
-    Warner noteWarner = new Warner();
-
     /**
      * Check that method arguments conform to its instantiation.
      **/
@@ -3928,7 +3926,7 @@
         // For methods, we need to compute the instance type by
         // Resolve.instantiate from the symbol's type as well as
         // any type arguments and value arguments.
-        noteWarner.clear();
+        Warner noteWarner = new Warner();
         try {
             Type owntype = rs.checkMethod(
                     env,

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/langtools/test/tools/javac/generics/inference/8147493/T8147493a.java	Wed Jan 20 10:50:28 2016 +0000
@@ -0,0 +1,45 @@
+/*
+ * Copyright (c) 2016, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+/**
+ * @test
+ * @bug 8147493
+ * @summary regression when type-checking unchecked method calls
+ * @compile T8147493a.java
+ */
+
+abstract class T8147493a {
+    interface One {}
+    interface Two<I extends One> { I get(); }
+    interface Three<T> {}
+    interface Four<T> {}
+
+    <E extends Two<?>, L extends Three<E>> Four<L> f(Class raw, E destination) {
+        return g(raw, destination.get());
+    }
+
+    abstract <I extends One, E extends Two<I>, L extends Three<E>> Four<L> g(
+            Class<L> labelClass, I destinationId);
+}

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/langtools/test/tools/javac/generics/inference/8147493/T8147493b.java	Wed Jan 20 10:50:28 2016 +0000
@@ -0,0 +1,42 @@
+/*
+ * Copyright (c) 2016, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+/**
+ * @test
+ * @bug 8147493
+ * @summary regression when type-checking unchecked method calls
+ * @compile T8147493b.java
+ */
+
+abstract class T8147493b {
+
+    abstract <A> A f(A t);
+    abstract <B> Class<B> g(Class<B> x, String y);
+    abstract <C> void h(C t);
+
+    void m(Class raw) {
+      h(g(raw, f(null)));
+    }
+}