fixed JASSIST-163

git-svn-id: http://anonsvn.jboss.org/repos/javassist/trunk@645 30ef5769-5b8d-40dd-aea6-55b5d6557bb3

Readme.html

@@ -284,7 +284,7 @@ see javassist.Dump.
 <p>-version 3.17
 <ul>
 	<li>OSGi bundle info is now included in the jar file.
-	<li>JIRA JASSIST-166, 168, 170 have been fixed.
+	<li>JIRA JASSIST-163, 166, 168, 170, 171 have been fixed.
 </ul>
 
 <p>-version 3.16.1 on March 6, 2012

src/main/javassist/util/proxy/RuntimeSupport.java

@@ -50,7 +50,10 @@ public class RuntimeSupport {
                                     String thisMethod, int index,
                                     String desc, java.lang.reflect.Method[] methods)
     {
-        if (methods[index] == null) {
+        /* Once methods[index] and methods[index + 1] are set to non-null, 
+         * then their values never change.
+         */
+        if (methods[index] == null || methods[index + 1] == null) {
             Method m1 = thisMethod == null ? null
                                            : findMethod(self, thisMethod, desc);
             Method m0 = findSuperMethod(self, superMethod, desc);