[flutter_tools] handle further devtools NPE (#74764)

4a1445bb · Jonah Williams · GitHub · 71aec53a · 4a1445bb
Unverified Commit 4a1445bb authored Jan 27, 2021 by Jonah Williams Committed by GitHub Jan 27, 2021
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resident_runner.dart packages/flutter_tools/lib/src/resident_runner.dart +3 -0

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--- a/packages/flutter_tools/lib/src/resident_runner.dart
+++ b/packages/flutter_tools/lib/src/resident_runner.dart
@@ -1304,6 +1304,9 @@ abstract class ResidentRunner {
    }
    await waitForExtension(device.vmService, 'ext.flutter.activeDevToolsServerAddress');
    try {
+      if (_devToolsLauncher == null) {
+        return;
+      }
      unawaited(invokeFlutterExtensionRpcRawOnFirstIsolate(
        'ext.flutter.activeDevToolsServerAddress',
        device: device,