As per the spec, we should enable some @assert in streams implementation.
Created attachment 265053 [details] Patch
Created attachment 265054 [details] Rebasing
Patch activates assertion checking. It fixes a small bug when pull promise is rejected. This actually implements the "if" check of https://streams.spec.whatwg.org/#request-readable-stream-pull (step 7a)
Comment on attachment 265054 [details] Rebasing Clearing flags on attachment: 265054 Committed r192160: <http://trac.webkit.org/changeset/192160>
All reviewed patches have been landed. Closing bug.