1 files changed, 9 insertions, 0 deletions
diff --git a/js/src/jit-test/tests/jaeger/bug599488.js b/js/src/jit-test/tests/jaeger/bug599488.js
new file mode 100644
index 0000000000..f2cf952091
--- /dev/null
+++ b/js/src/jit-test/tests/jaeger/bug599488.js
@@ -0,0 +1,9 @@
+/* Don't crash. */
+function foo(y) {
+  var x = y;
+  if (x != x)
+    return true;
+  return false;
+}
+assertEq(foo("three"), false);
+assertEq(foo(NaN), true);