diff -r 000000000000 -r 6474c204b198 js/src/jit-test/tests/basic/cross-context-stack-1.js
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/js/src/jit-test/tests/basic/cross-context-stack-1.js	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,21 @@
+// Error().stack (ScriptFrameIter) is no longer context-bound.
+function beta() {
+    evaluate("function gamma() {\nstack = Error().stack;\n };\n gamma();", {newContext: true});
+}
+function alpha() {
+    beta();
+}
+alpha();
+assertEq(/alpha@/.test(stack), true);
+assertEq(/beta@/.test(stack), true);
+assertEq(/gamma@/.test(stack), true);
+assertEq(/delta@/.test(stack), false);
+
+function delta() {
+    evaluate("stack = Error().stack", {newContext: true});
+}
+delta();
+assertEq(/alpha@/.test(stack), false);
+assertEq(/beta@/.test(stack), false);
+assertEq(/gamma@/.test(stack), false);
+assertEq(/delta@/.test(stack), true);