1 files changed, 31 insertions, 0 deletions
diff --git a/js/src/jit-test/tests/debug/Frame-onStack-04.js b/js/src/jit-test/tests/debug/Frame-onStack-04.js
new file mode 100644
index 0000000000..cc9a132091
--- /dev/null
+++ b/js/src/jit-test/tests/debug/Frame-onStack-04.js
@@ -0,0 +1,31 @@
+// frame.onStack is false for frames discarded during uncatchable error unwinding.
+
+load(libdir + 'asserts.js');
+
+var g = newGlobal({newCompartment: true});
+var dbg = Debugger(g);
+var hits = 0;
+var snapshot;
+dbg.onDebuggerStatement = function (frame) {
+    var stack = [];
+    for (var f = frame; f; f = f.older) {
+        if (f.type === "call" && f.script !== null)
+            stack.push(f);
+    }
+    snapshot = stack;
+    if (hits++ === 0)
+        assertEq(frame.eval("x();"), null);
+    else
+        return null;
+};
+
+g.eval("function z() { debugger; }");
+g.eval("function y() { z(); }");
+g.eval("function x() { y(); }");
+assertEq(g.eval("debugger; 'ok';"), "ok");
+assertEq(hits, 2);
+assertEq(snapshot.length, 3);
+for (var i = 0; i < snapshot.length; i++) {
+    assertEq(snapshot[i].onStack, false);
+    assertThrowsInstanceOf(() => frame.script, Error);
+}