1 files changed, 12 insertions, 0 deletions
diff --git a/js/src/jit-test/tests/ion/bug1247909.js b/js/src/jit-test/tests/ion/bug1247909.js
new file mode 100644
index 000000000..7dd7efd0f
--- /dev/null
+++ b/js/src/jit-test/tests/ion/bug1247909.js
@@ -0,0 +1,12 @@
+// |jit-test| --ion-pgo=on;
+
+function test() {
+  foo(startTest("", c(""),
+    test([{ 0 : c(), 0 : toString("", c(), [], tab([])) }])
+  ));
+  function f() {};
+}
+
+try {
+  test();
+} catch(e) {}