fix an issue where the refresh benchmark would overwrite a completer (#4315)

2016-06-01 19:57:08 -07:00
parent 6d4fd85054
commit bc5d407477
1 changed files with 1 additions and 1 deletions
--- a/packages/flutter_tools/lib/src/observatory.dart
+++ b/packages/flutter_tools/lib/src/observatory.dart
@@ -83,7 +83,7 @@ class Observatory {
    if (isolates.isNotEmpty)
      return isolates.first;

-    _waitFirstIsolateCompleter = new Completer<IsolateRef>();
+    _waitFirstIsolateCompleter ??= new Completer<IsolateRef>();

    getVM().then((VM vm) {
      for (IsolateRef isolate in vm.isolates)