diff -r 000000000000 -r 6474c204b198 browser/devtools/debugger/test/code_tracing-01.js
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/browser/devtools/debugger/test/code_tracing-01.js	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,29 @@
+function factorial(n) {
+  if (n <= 1) {
+    return 1;
+  } else {
+    return n * factorial(n - 1);
+  }
+}
+
+function* yielder(n) {
+  while (n-- >= 0) {
+    yield { value: n, squared: n * n };
+  }
+}
+
+function thrower() {
+  throw new Error("Curse your sudden but inevitable betrayal!");
+}
+
+function main() {
+  factorial(5);
+
+  // XXX bug 923729: Can't test yielding yet.
+  // for (let x of yielder(5)) {}
+
+  try {
+    thrower();
+  } catch (e) {
+  }
+}