1 files changed, 11 insertions, 0 deletions
diff --git a/js/src/jit-test/tests/generators/bug1491331.js b/js/src/jit-test/tests/generators/bug1491331.js
new file mode 100644
index 0000000000..2fe3770234
--- /dev/null
+++ b/js/src/jit-test/tests/generators/bug1491331.js
@@ -0,0 +1,11 @@
+let g = newGlobal({newCompartment: true});
+g.eval('function* f() { yield 123; }');
+
+let dbg = Debugger(g);
+dbg.onEnterFrame = frame => {
+    dbg.removeDebuggee(g);
+    dbg.addDebuggee(g);
+};
+
+let genObj = g.f();
+genObj.return();