1 files changed, 12 insertions, 0 deletions
diff --git a/js/src/jit-test/tests/saved-stacks/same-stack.js b/js/src/jit-test/tests/saved-stacks/same-stack.js
new file mode 100644
index 000000000..b82ba1c04
--- /dev/null
+++ b/js/src/jit-test/tests/saved-stacks/same-stack.js
@@ -0,0 +1,12 @@
+// Test that the same saved stack is only ever allocated once.
+
+const stacks = [];
+
+for (let i = 0; i < 10; i++) {
+  stacks.push(saveStack());
+}
+
+const s = stacks.pop();
+for (let stack of stacks) {
+  assertEq(s, stack);
+}