[Bug 56260] 16-bit Myst deadlocks when entering Book

[WineHQ Bugzilla]

https://bugs.winehq.org/show_bug.cgi?id=56260

--- Comment #2 from Fabian Maurer  ---
Created attachment 75972
  --> https://bugs.winehq.org/attachment.cgi?id=75972
Test program to reproduce the issue

Attaching a test program that does what I think Myst is doing. Compile using
OpenWatcom (command included in file).

For some reason, I get "invalid parameter" on my XP VM, Win3.1 Dosbox and Win
2000 VM... But another user in IRC tested on a real Win98 Machine and it works.

It hangs in Wine though, so I do think this is the issue. On Wine the WOM_DONE
message is never sent because the thread tries to get the Win16 lock mutex, but
since one thread is currently running that fails and waits forever.