1 files changed, 18 insertions, 0 deletions
diff --git a/js/src/jit-test/tests/class/bug1645835.js b/js/src/jit-test/tests/class/bug1645835.js
new file mode 100644
index 0000000000..3a66d94eec
--- /dev/null
+++ b/js/src/jit-test/tests/class/bug1645835.js
@@ -0,0 +1,18 @@
+function Base() {
+  // Creates MNewObject, which is recoverable. An instruction which has the
+  // |RecoveredOnBailout| flag set mustn't have any live uses.
+  return {};
+}
+
+class C extends Base {
+  constructor() {
+    // |super()| assigns to |this|. The |this| slot mustn't be optimised away
+    // in case the debugger tries to read that slot.
+    super();
+  }
+}
+
+for (var i = 0; i < 100; i++) {
+  // The returned object is not used, so it can be optimised away.
+  new C();
+}