1 files changed, 17 insertions, 0 deletions
diff --git a/js/src/jit-test/tests/cacheir/set-has-string-gczeal.js b/js/src/jit-test/tests/cacheir/set-has-string-gczeal.js
new file mode 100644
index 0000000000..9ef81634d6
--- /dev/null
+++ b/js/src/jit-test/tests/cacheir/set-has-string-gczeal.js
@@ -0,0 +1,17 @@
+// Ensure string hashing works correctly under gczeal=compact.
+
+gczeal(14)
+
+function test() {
+  var set = new Set();
+  var c = 0;
+  var N = 1000;
+  for (var i = 0; i < N; ++i) {
+    var k = String.fromCodePoint(i);
+    set.add(k);
+    if (set.has(k)) c++;
+  }
+  assertEq(c, N);
+}
+
+test();