lib/runtime/dart/async.js - Issue 1243503007: fixes #221, initial sync*, async, async* implementation

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Unified Diff: lib/runtime/dart/async.js

Issue 1243503007: fixes #221, initial sync*, async, async* implementation (Closed) Base URL: git@github.com:dart-lang/dev_compiler.git@master

Patch Set: Created 5 years, 5 months ago

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Index: lib/runtime/dart/async.js

diff --git a/lib/runtime/dart/async.js b/lib/runtime/dart/async.js

index 2f574edf73e978abacdefcb2f6d607bcf77762d1..9f026c7ac2bf1a19be55690da00447e615407b02 100644

--- a/lib/runtime/dart/async.js

+++ b/lib/runtime/dart/async.js

@@ -4070,6 +4070,8 @@ dart_library.library('dart/async', null, /* Imports */[

}

cancel() {

let subscription = this[_subscription];

+ if (subscription == null)

+ return null;

if (this[_state] == _StreamIteratorImpl$()._STATE_MOVING) {

let hasNext = dart.as(this[_futureOrPrefetch], _Future$(core.bool));

this[_clear]();

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