Bug 856338 - Using sequence<foo>? as an argument type crashes when passing non-null value, p=Ms2ger+smaug,r=bz

--HG--
extra : rebase_source : fb54e52db051584333c9430b0b000ee052e5b2d7

dom/bindings/Codegen.py

@@ -2508,7 +2508,7 @@ def getJSToNativeConversionTemplate(type, descriptorProvider, failureCode=None,
         sequenceType = typeName.define()
         if nullable:
             typeName = CGTemplatedType("Nullable", typeName)
-            arrayRef = "${declName}.Value()"
+            arrayRef = "const_cast<Nullable<" + sequenceType + " >& >(${declName}).SetValue()"
         else:
             arrayRef = "${declName}"
         # If we're optional or a member, the const will come from the Optional