diff -r 0cfd5baa7154 -r 2375ce96e80d src/share/classes/com/sun/tools/javac/jvm/ClassReader.java
--- a/src/share/classes/com/sun/tools/javac/jvm/ClassReader.java	Thu Sep 19 08:26:26 2013 -0700
+++ b/src/share/classes/com/sun/tools/javac/jvm/ClassReader.java	Thu Sep 19 20:57:37 2013 +0100
@@ -56,6 +56,7 @@
 import static com.sun.tools.javac.code.Flags.*;
 import static com.sun.tools.javac.code.Kinds.*;
 import static com.sun.tools.javac.code.TypeTag.CLASS;
+import static com.sun.tools.javac.code.TypeTag.TYPEVAR;
 import static com.sun.tools.javac.jvm.ClassFile.*;
 import static com.sun.tools.javac.jvm.ClassFile.Version.*;
 
@@ -703,6 +704,12 @@
                 sigp++;
                 thrown = thrown.prepend(sigToType());
             }
+            // if there is a typevar in the throws clause we should state it.
+            for (List<Type> l = thrown; l.nonEmpty(); l = l.tail) {
+                if (l.head.hasTag(TYPEVAR)) {
+                    l.head.tsym.flags_field |= THROWS;
+                }
+            }
             return new MethodType(argtypes,
                                   restype,
                                   thrown.reverse(),