With the implementation of ReadableStream start, the streams/readablestream-reader.html is not anymore testing the right code path, as the stream is collected after the stream is actually started, which happens asynchronously.
Created attachment 250908 [details] Patch
Comment on attachment 250908 [details] Patch Clearing flags on attachment: 250908 Committed r182941: <http://trac.webkit.org/changeset/182941>
All reviewed patches have been landed. Closing bug.