NPE in QpackEncoder.streamCancellation()

[poisonriver]

I would like to resurrect the issue #252
The only solution I found to eliminate this error is to check streamTrackers for null here https://github.com/netty/netty-incubator-codec-http3/blob/main/src/main/java/io/netty/incubator/codec/http3/QpackEncoder.java#L156
But I don't think this is a real 'fix'

[normanmaurer]

@poisonriver I need a way to reproduce it :(

[poisonriver]

@poisonriver I need a way to reproduce it :(
@normanmaurer It happens when a request is cancelled in a browser while it's still downloading the data

[normanmaurer]

@poisonriver can you give me an example server code you use that will show the problem when access it via safari / chrome ?

[poisonriver]

@normanmaurer Thank you!