diff -r 90e43c49e318 -r 3bc09f4676a9 langtools/src/share/classes/com/sun/tools/javac/code/Flags.java
--- a/langtools/src/share/classes/com/sun/tools/javac/code/Flags.java	Wed Jul 30 20:31:39 2014 +0400
+++ b/langtools/src/share/classes/com/sun/tools/javac/code/Flags.java	Fri Aug 01 11:09:40 2014 -0700
@@ -66,7 +66,7 @@
                 flags &= ~flag.value;
             }
         }
-        Assert.check(flags == 0, "Flags parameter contains unknown flags " + flags);
+        Assert.check(flags == 0);
         return flagSet;
     }