https://bugs.winehq.org/show_bug.cgi?id=54858
--- Comment #7 from Hans Leidekker hans@meelstraat.net --- (In reply to Olivier F. R. Dierick from comment #5)
Hello,
There is indeed a bug with the debug channel name. I could get the output in a WINEDEBUG=+all,-relay and the channel name appears to be mangled like a buffer overflow. I'll need to check that.
The maximum size for a debug channel name is 15, including null.