1 files changed, 13 insertions, 0 deletions
diff --git a/js/src/jit-test/tests/basic/bug642569.js b/js/src/jit-test/tests/basic/bug642569.js
new file mode 100644
index 0000000000..6f84492d8b
--- /dev/null
+++ b/js/src/jit-test/tests/basic/bug642569.js
@@ -0,0 +1,13 @@
+function main() {
+    var v1,  v2,  v3,  v4,  v5,  v6,  v7,  v8,  v9,  v10, v11, v12, v13, v14,
+        v15, v16, v17, v18, v19, v20, v21, v22, v23, v24, v25, v26, v27, v28,
+        v29, v30, v31, v32, v33, v34, v35, v36, v37, v38, v39, v40, v41, v42,
+        v43, v44, v45, v46, v47;
+    var v48 = 0, v49 = 0;
+    if (true) {
+        var v50 = v48 - 1;
+        var v51 = v49 + 1;
+        return v51;
+    }
+}
+assertEq(main(), 1);