tool/input_sdk/lib/async/stream_impl.dart - Issue 1243503007: fixes #221, initial sync*, async, async* implementation

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Unified Diff: tool/input_sdk/lib/async/stream_impl.dart

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: tool/input_sdk/lib/async/stream_impl.dart

diff --git a/tool/input_sdk/lib/async/stream_impl.dart b/tool/input_sdk/lib/async/stream_impl.dart

index dbf3f1b6398a278d72cebf6aadefabc32d51675f..b613cfdc8c23093046fbb915903a453e6ea0fa21 100644

--- a/tool/input_sdk/lib/async/stream_impl.dart

+++ b/tool/input_sdk/lib/async/stream_impl.dart

@@ -1029,6 +1029,8 @@ class _StreamIteratorImpl<T> implements StreamIterator<T> {

Future cancel() {

StreamSubscription subscription = _subscription;

+ // Cherry pick of: https://codereview.chromium.org//896793002

+ if (subscription == null) return null;

if (_state == _STATE_MOVING) {

_Future<bool> hasNext = _futureOrPrefetch;

_clear();

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