1 files changed, 10 insertions, 0 deletions
diff --git a/js/src/jit-test/tests/ion/bug1204165.js b/js/src/jit-test/tests/ion/bug1204165.js
new file mode 100644
index 0000000000..b9d7486188
--- /dev/null
+++ b/js/src/jit-test/tests/ion/bug1204165.js
@@ -0,0 +1,10 @@
+var x;
+function f() {
+    x = [];
+    for (var i = 0; i < 1; ++i) {
+        x.push("");
+    }
+    [0].concat(x);
+}
+f();
+f();