debug2: channel <x>: window <number> sent adjust <number_2>

Question

I'm modifying a file in vim inside of a tmux session and this line (that is not part of the file) keeps popping up on my cursor line:

debug2: channel 0: window 99720 sent adjust 6670

Why is this message popping up and what can I do about it?

Answer 1

This message is the result of connecting to a machine using ssh with the -vv flag turned on. In my case I'd used -vv to diagnose why a client machine was rejecting my connection and had forgotten to close and reopen the session without debug flags after diagnosing the problem.