1 files changed, 26 insertions, 0 deletions
diff --git a/js/src/jit-test/tests/debug/prologueFailure-03.js b/js/src/jit-test/tests/debug/prologueFailure-03.js
new file mode 100644
index 000000000..c3f8aa018
--- /dev/null
+++ b/js/src/jit-test/tests/debug/prologueFailure-03.js
@@ -0,0 +1,26 @@
+g = newGlobal();
+g.parent = this;
+g.eval("(" + function() {
+    let calledTimes = 0;
+    Debugger(parent).onExceptionUnwind = function(frame) {
+        switch (calledTimes++) {
+          case 0:
+            assertEq(frame.older.type, "global");
+            break;
+          case 1:
+            // Force toplevel to return placidly so that we can tell assertions
+            // from the throwing in the test.
+            assertEq(frame.older, null);
+            return { return: undefined };
+          default:
+            assertEq(false, true);
+        }
+    }
+} + ")()");
+
+var handler = {
+    get() {
+        r;
+    }
+};
+new(new Proxy(function() {}, handler));