https://bugs.winehq.org/show_bug.cgi?id=50142
--- Comment #3 from Gijs Vermeulen gijsvrm@gmail.com --- (In reply to jdawin from comment #2)
(In reply to Gijs Vermeulen from comment #1)
This seems fixed for me in wine-6.0-rc1, please retest.
In wine-6.0-rc1 the behaviour is still the same for me. I'm unable to run any programs with winedbg.
As the commit message of 419abd49a1f816e5a869dbf4cc81114cd516138b was "ntdll: Support AVX registers for other thread in Nt{Get|Set}ContextThread()." and my CPU does not support AVX, it may have something to do with the issue. Just a guess.
On which CPU did you test?
I tested on both an Intel i7-4980HQ on macOS and an Intel i5-4460 on Linux.