1 files changed, 13 insertions, 0 deletions
diff --git a/js/src/jit-test/tests/debug/Object-executeInGlobal-10.js b/js/src/jit-test/tests/debug/Object-executeInGlobal-10.js
new file mode 100644
index 0000000000..0120bcc1dd
--- /dev/null
+++ b/js/src/jit-test/tests/debug/Object-executeInGlobal-10.js
@@ -0,0 +1,13 @@
+var g = newGlobal({newCompartment: true});
+var dbg = new Debugger;
+var gw = dbg.addDebuggee(g);
+
+// executeInGlobal should be able to introduce and persist lexical bindings.
+assertEq(gw.executeInGlobal(`let x = 42; x;`).return, 42);
+assertEq(gw.executeInGlobal(`x;`).return, 42);
+
+// By contrast, Debugger.Frame.eval is like direct eval, and shouldn't be able
+// to introduce new lexical bindings.
+dbg.onDebuggerStatement = function (frame) { frame.eval(`let y = 84;`); };
+g.eval(`debugger;`);
+assertEq(!!gw.executeInGlobal(`y;`).throw, true);