1 files changed, 22 insertions, 0 deletions
diff --git a/js/src/jit-test/tests/saved-stacks/bug-1640034-dbg-eval-across-compartments.js b/js/src/jit-test/tests/saved-stacks/bug-1640034-dbg-eval-across-compartments.js
new file mode 100644
index 0000000000..73c4dc9621
--- /dev/null
+++ b/js/src/jit-test/tests/saved-stacks/bug-1640034-dbg-eval-across-compartments.js
@@ -0,0 +1,22 @@
+// This test ensures that capturing a stack works when the Debugger.Frame
+// being used for an eval has an async stack on the activation between
+// the two debuggee frames.
+
+const global = newGlobal({ newCompartment: true });
+const dbg = new Debugger(global);
+dbg.onDebuggerStatement = function() {
+  const frame = dbg.getNewestFrame();
+
+  // Capturing this stack inside the debugger compartment will populate the
+  // LiveSavedFrameCache with a SavedFrame in the debugger compartment.
+  const opts = {
+    stack: saveStack(),
+  };
+
+  bindToAsyncStack(function() {
+    // This captured stack needs to properly invalidate the LiveSavedFrameCache
+    // for the frame and create a new one inside the debuggee compartment.
+    frame.eval(`saveStack()`);
+  }, opts)();
+};
+global.eval(`debugger;`);