1 files changed, 43 insertions, 0 deletions
diff --git a/js/src/jit-test/tests/debug/Frame-newTargetEval-02.js b/js/src/jit-test/tests/debug/Frame-newTargetEval-02.js
new file mode 100644
index 0000000000..89a20d4e39
--- /dev/null
+++ b/js/src/jit-test/tests/debug/Frame-newTargetEval-02.js
@@ -0,0 +1,43 @@
+// Test that new.target is acceptably usable in RematerializedFrames.
+
+gczeal(0);
+
+load(libdir + "jitopts.js");
+
+if (!jitTogglesMatch(Opts_Ion2NoOffthreadCompilation))
+  quit();
+
+withJitOptions(Opts_Ion2NoOffthreadCompilation, function () {
+  var g = newGlobal({newCompartment: true});
+  var dbg = new Debugger;
+
+  g.toggle = function toggle(d, expected) {
+    if (d) {
+      dbg.addDebuggee(g);
+
+      var frame = dbg.getNewestFrame();
+      assertEq(frame.implementation, "ion");
+
+      // the arrow function will not be constructing, even though it has a
+      // new.target value.
+      assertEq(frame.constructing, false);
+
+      // CONGRATS IF THIS FAILS! You, proud saviour, have made new.target parse
+      // in debug frame evals (presumably by hooking up static scope walks).
+      // Uncomment the assert below for efaust's undying gratitude.
+      // Note that we use .name here because of CCW nonsense.
+      assertEq(frame.eval('new.target').throw.unsafeDereference().name, "SyntaxError");
+      // assertEq(frame.eval('new.target').return.unsafeDereference(), expected);
+    }
+  };
+
+  g.eval("" + function f(d) { new g(d, g, 15); });
+
+  g.eval("" + function g(d, expected) { (() => toggle(d, expected))(); });
+
+  g.eval("(" + function test() {
+    for (var i = 0; i < 5; i++)
+      f(false);
+    f(true);
+  } + ")();");
+});