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Avoid unhandled exceptions on unawaited async path #2289

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Aug 23, 2023
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21 changes: 14 additions & 7 deletions lib/PuppeteerSharp/ChromeTargetManager.cs
Original file line number Diff line number Diff line change
Expand Up @@ -160,7 +160,7 @@ private void OnMessageReceived(object sender, MessageEventArgs e)
return;

case "Target.targetDestroyed":
OnTargetDestroyed(e.MessageData.ToObject<TargetDestroyedResponse>(true));
_ = OnTargetDestroyedAsync(e.MessageID, e.MessageData.ToObject<TargetDestroyedResponse>(true));
return;

case "Target.targetInfoChanged":
Expand Down Expand Up @@ -198,15 +198,22 @@ private void OnTargetCreated(TargetCreatedResponse e)
}
}

private async void OnTargetDestroyed(TargetDestroyedResponse e)
private async Task OnTargetDestroyedAsync(string messageId, TargetDestroyedResponse e)
{
_discoveredTargetsByTargetId.TryRemove(e.TargetId, out var targetInfo);
await EnsureTargetsIdsForInit().ConfigureAwait(false);
FinishInitializationIfReady(e.TargetId);
try
{
_discoveredTargetsByTargetId.TryRemove(e.TargetId, out var targetInfo);
await EnsureTargetsIdsForInit().ConfigureAwait(false);
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FinishInitializationIfReady(e.TargetId);

if (targetInfo?.Type == TargetType.ServiceWorker && _availableTargetsByTargetIdDictionary.TryRemove(e.TargetId, out var target))
if (targetInfo?.Type == TargetType.ServiceWorker && _availableTargetsByTargetIdDictionary.TryRemove(e.TargetId, out var target))
{
TargetGone?.Invoke(this, new TargetChangedArgs { Target = target, TargetInfo = targetInfo });
}
}
catch (Exception ex)
{
TargetGone?.Invoke(this, new TargetChangedArgs { Target = target, TargetInfo = targetInfo });
HandleExceptionOnMessageReceived(messageId, ex);
}
}

Expand Down