1 files changed, 10 insertions, 0 deletions
diff --git a/js/src/jit-test/tests/ion/bug728187.js b/js/src/jit-test/tests/ion/bug728187.js
new file mode 100644
index 000000000..ecfb3dddd
--- /dev/null
+++ b/js/src/jit-test/tests/ion/bug728187.js
@@ -0,0 +1,10 @@
+function f(x) {
+    if (x.y()) {};
+}
+f({y: function() {}});
+try {
+    f(10);
+    assertEq(0, 1);
+} catch(e) {
+    assertEq(e instanceof TypeError, true);
+}