1 files changed, 13 insertions, 0 deletions
diff --git a/js/src/jit-test/tests/debug/class-08.js b/js/src/jit-test/tests/debug/class-08.js
new file mode 100644
index 0000000000..000f9ae67c
--- /dev/null
+++ b/js/src/jit-test/tests/debug/class-08.js
@@ -0,0 +1,13 @@
+let g = newGlobal({newCompartment: true});
+let dbg = Debugger(g);
+dbg.onDebuggerStatement = function() {
+    // Force the constructor to return undefined, which should be replaced with
+    // |this| if the latter has been initialized.
+    return { return: undefined };
+}
+
+assertEq(g.eval(`
+    new (class extends class {} {
+        constructor() { super(); this.foo = 42; debugger; }
+    })
+`).foo, 42);