From 4be6fd1ff79ec26934b816e31c08a97cafaff38b Mon Sep 17 00:00:00 2001
From: isonmad <isonmad@github>
Date: Thu, 22 Sep 2016 02:29:15 +0000
Subject: [PATCH] Add asserts to ReadableStreamDefaultController

These asserts are in ReadableByteStreamController, so they should be here too.
---
 index.bs                                        | 2 ++
 reference-implementation/lib/readable-stream.js | 4 ++++
 2 files changed, 6 insertions(+)

diff --git a/index.bs b/index.bs
index 6d93db3a2..2d1feaf79 100644
--- a/index.bs
+++ b/index.bs
@@ -1446,6 +1446,8 @@ ReadableStreamDefaultController(<var>stream</var>, <var>underlyingSource</var>,
   1. Resolve _startResult_ as a promise:
     1. Upon fulfillment,
       1. Set _controller_.[[started]] to *true*.
+      1. Assert: _controller_.[[pulling]] is *false*.
+      1. Assert: _controller_.[[pullAgain]] is *false*.
       1. Perform ! ReadableStreamDefaultControllerCallPullIfNeeded(_controller_).
     1. Upon rejection with reason _r_,
       1. Perform ! ReadableStreamDefaultControllerErrorIfNeeded(_controller_, _r_).
diff --git a/reference-implementation/lib/readable-stream.js b/reference-implementation/lib/readable-stream.js
index e7e40cfac..05e1e78f2 100644
--- a/reference-implementation/lib/readable-stream.js
+++ b/reference-implementation/lib/readable-stream.js
@@ -976,6 +976,10 @@ class ReadableStreamDefaultController {
     Promise.resolve(startResult).then(
       () => {
         controller._started = true;
+
+        assert(controller._pulling === false);
+        assert(controller._pullAgain === false);
+
         ReadableStreamDefaultControllerCallPullIfNeeded(controller);
       },
       r => {