--- a/src/share/classes/com/sun/tools/javac/comp/Resolve.java	Wed Apr 29 14:05:27 2015 -0700
+++ b/src/share/classes/com/sun/tools/javac/comp/Resolve.java	Fri May 01 16:43:28 2015 +0100
@@ -4086,7 +4086,7 @@
                             s : new MethodSymbol(
                                 s.flags(),
                                 s.name,
-                                types.createMethodTypeWithThrown(mt, allThrown),
+                                types.createMethodTypeWithThrown(s.type, allThrown),
                                 s.owner);
                 }
             }

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/test/tools/javac/generics/8064803/T8064803.java	Fri May 01 16:43:28 2015 +0100
@@ -0,0 +1,53 @@
+/*
+ * Copyright (c) 2014, 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 8064803
+ * @summary Javac erroneously uses instantiated signatures when merging abstract most-specific methods
+ */
+public class T8064803 {
+    interface ParentA<T> {
+        T process() throws Exception;
+    }
+
+    interface ParentB<T> {
+        T process() throws Exception;
+    }
+
+    interface Child<T> extends ParentA<T>, ParentB<T> { }
+
+    static class ChildImpl<T> implements Child<T> {
+        @Override
+        public T process() {
+            return null;
+        }
+    }
+
+    public static void main(String[] args) throws Exception {
+        Child<String> child = new ChildImpl<String>();
+        child.process();
+    }
+}