Bug 969764: Properly carry the source's element attribute name through off-thread compilations. r=bhackett

js/src/jit-test/tests/debug/Source-element-03.js

@@ -0,0 +1,24 @@
+// Owning elements and attribute names are attached to scripts compiled
+// off-thread.
+
+var g = newGlobal();
+var dbg = new Debugger;
+var gDO = dbg.addDebuggee(g);
+
+var elt = new g.Object;
+var eltDO = gDO.makeDebuggeeValue(elt);
+
+var log = '';
+dbg.onDebuggerStatement = function (frame) {
+  log += 'd';
+  var source = frame.script.source;
+  assertEq(source.element, eltDO);
+  assertEq(source.elementAttributeName, 'mass');
+};
+
+g.offThreadCompileScript('debugger;',
+                         { element: elt,
+                           elementAttributeName: 'mass' });
+log += 'o';
+g.runOffThreadScript();
+assertEq(log, 'od');

js/src/jsapi.cpp

@@ -4355,6 +4355,7 @@ JS::OwningCompileOptions::copy(JSContext *cx, const ReadOnlyCompileOptions &rhs)
     setPrincipals(rhs.principals());
     setOriginPrincipals(rhs.originPrincipals());
     setElement(rhs.element());
+    setElementAttributeName(rhs.elementAttributeName());
 
     return (setFileAndLine(cx, rhs.filename(), rhs.lineno) &&
             setSourceMapURL(cx, rhs.sourceMapURL()) &&