Bug 338865 - Scriptable XPIDL iface inheriting from noscript iface should throw error. r=froydnj

MozReview-Commit-ID: H6sF4Poz2V0

--HG--
extra : rebase_source : fdbd62049d96e89f0182f750da0dd52ad60eb717

xpcom/idl-parser/xpidl/xpidl.py

@@ -529,7 +529,7 @@ class Interface(object):
                 raise IDLError("interface '%s' inherits from non-interface type '%s'" % (self.name, self.base), self.location)
 
             if self.attributes.scriptable and not realbase.attributes.scriptable:
-                print >>sys.stderr, IDLError("interface '%s' is scriptable but derives from non-scriptable '%s'" % (self.name, self.base), self.location, warning=True)
+                raise IDLError("interface '%s' is scriptable but derives from non-scriptable '%s'" % (self.name, self.base), self.location, warning=True)
 
             if self.attributes.scriptable and realbase.attributes.builtinclass and not self.attributes.builtinclass:
                 raise IDLError("interface '%s' is not builtinclass but derives from builtinclass '%s'" % (self.name, self.base), self.location)