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Fix a race in runFromSource. (#9495)

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There is a race where we could complete a future based on a stream event
and then before we cancel the stream subscription, we get another event
and try and complete the future again.
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John McCutchan 2017-04-20 10:05:30 -07:00 committed by GitHub
parent f29dd4f921
commit 03d684be6d
1 changed files with 2 additions and 1 deletions
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1
packages/flutter_tools/lib/src/vmservice.dart
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@ -1124,6 +1124,7 @@ class FlutterView extends ServiceObject {
// launch errors. // launch errors.
if (event.kind == ServiceEvent.kIsolateRunnable) { if (event.kind == ServiceEvent.kIsolateRunnable) {
printTrace('Isolate is runnable.'); printTrace('Isolate is runnable.');
if (!completer.isCompleted)
completer.complete(null); completer.complete(null);
} }
}); });