1 files changed, 49 insertions, 0 deletions
diff --git a/js/src/jit-test/tests/debug/Frame-identity-03.js b/js/src/jit-test/tests/debug/Frame-identity-03.js
new file mode 100644
index 0000000000..fad88e01c4
--- /dev/null
+++ b/js/src/jit-test/tests/debug/Frame-identity-03.js
@@ -0,0 +1,49 @@
+// Test that we create new Debugger.Frames and reuse old ones correctly with recursion.
+
+var g = newGlobal({newCompartment: true});
+g.debuggeeGlobal = this;
+g.eval("(" + function () {
+        function id(f) {
+            return ("id" in f) ? f.id : (f.id = nextid++);
+        }
+
+        var dbg = new Debugger(debuggeeGlobal);
+        dbg.onDebuggerStatement = function (frame) {
+            var a = [];
+            for (; frame; frame = frame.older)
+                a.push(frame);
+            var s = '';
+            while (a.length)
+                s += id(a.pop());
+            results.push(s);
+        };
+    } + ")();");
+
+function cons(a, b) {
+    debugger;
+    return [a, b];
+}
+
+function tree(n) {
+    if (n < 2)
+        return n;
+    return cons(tree(n - 1), tree(n - 2));
+}
+
+g.eval("results = []; nextid = 0;");
+debugger;
+assertEq(g.results.join(","), "0");
+assertEq(g.nextid, 1);
+
+g.eval("results = [];");
+tree(2);
+assertEq(g.results.join(","), "012"); // 0=global, 1=tree, 2=cons
+
+g.eval("results = []; nextid = 1;");
+tree(3);
+assertEq(g.results.join(","), "0123,014"); //0=global, 1=tree(3), 2=tree(2), 3=cons, 4=cons
+
+g.eval("results = []; nextid = 1;");
+tree(4);
+// 0=global, 1=tree(4), 2=tree(3), 3=tree(2), 4=cons, tree(1), 5=cons, 6=tree(2), 7=cons, 8=cons
+assertEq(g.results.join(","), "01234,0125,0167,018");