1 files changed, 21 insertions, 0 deletions
diff --git a/js/src/jit-test/tests/warp/cancel-offthread-compile.js b/js/src/jit-test/tests/warp/cancel-offthread-compile.js
new file mode 100644
index 0000000000..939d128ae1
--- /dev/null
+++ b/js/src/jit-test/tests/warp/cancel-offthread-compile.js
@@ -0,0 +1,21 @@
+// |jit-test| --fast-warmup; skip-if: helperThreadCount() === 0
+
+function foo(o) {
+    return o.y;
+}
+
+with ({}) {}
+
+var sum = 0;
+
+// Trigger an off-thread Warp compile.
+for (var i = 0; i < 30; i++) {
+    sum += foo({y: 1});
+}
+
+// Attach a new stub and cancel that compile.
+for (var i = 0; i < 30; i++) {
+    sum += foo({x: 1, y: 1});
+}
+
+assertEq(sum, 60);