diff --git a/libdeno/binding.cc b/libdeno/binding.cc
index 8f601412f81c5..2a68d89aae231 100644
--- a/libdeno/binding.cc
+++ b/libdeno/binding.cc
@@ -182,25 +182,17 @@ void PromiseRejectCallback(v8::PromiseRejectMessage promise_reject_message) {
       d->pending_promise_map_.emplace(std::piecewise_construct,
                                       std::make_tuple(promise_id),
                                       std::make_tuple(d->isolate_, error));
-      // rejectMap.set(promise, (error as Error).stack ||
-      // "RejectWithNoHandler");
       break;
 
     case v8::kPromiseHandlerAddedAfterReject:
-      // unhandled event cancelled
       d->pending_promise_map_.erase(promise_id);
-      // rejectMap.delete(promise);
       break;
 
     case v8::kPromiseRejectAfterResolved:
-      // Should not warn. See #1272
-      // d->pending_promise_events_++;
       break;
 
     case v8::kPromiseResolveAfterResolved:
-      // d->pending_promise_events_++;
-      // error is string here
-      // otherErrorMap.set(promise, `Promise warning: ${error as string}`);
+      // Should not warn. See #1272
       break;
 
     default:
diff --git a/src/main.rs b/src/main.rs
index abf12c6d5dd0f..cdb7d8dd0611c 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -73,7 +73,7 @@ impl log::Log for Logger {
 
 fn print_err_and_exit(err: js_errors::JSError) {
   // TODO Currently tests depend on exception going to stdout. It should go
-  // to stderr.
+  // to stderr. https://github.com/denoland/deno/issues/964
   println!("{}", err.to_string());
   std::process::exit(1);
 }