Error on emit declaration of extends class w/o symbol

Error when emitting an extends clause for a type that has no symbol.
This error only occurs on exported classes.
This prevents the emitter from producing types that extend from
intersections, which are not parseable right now.

src/services/utilities.ts

@@ -1166,7 +1166,8 @@ namespace ts {
             decreaseIndent: () => { indent--; },
             clear: resetWriter,
             trackSymbol: noop,
-            reportInaccessibleThisError: noop
+            reportInaccessibleThisError: noop,
+            reportIllegalExtends: noop
         };
 
         function writeIndent() {
@@ -1386,4 +1387,4 @@ namespace ts {
         // First token is the open curly, this is where we want to put the 'super' call.
         return constructor.body.getFirstToken(sourceFile).getEnd();
     }
-}
+}