https://bugs.winehq.org/show_bug.cgi?id=39388
--- Comment #3 from super_man@post.com --- (In reply to super_man from comment #2)
It looks like steam bug and not anything related to the game. But If you have issue running the game it could be this bug
00000025 RAR Password Unlocker.exe 0000002a 0 00000029 0 00000028 0 00000027 0 00000026 0 00000020 explorer.exe 0000003c 0 00000016 0 0000001f 0 00000038 (D) C:\GOG Games\Don't Starve\bin\dontstarve.exe
Doesn't look clean prefix to me. The attached error looks like the error steam produces lately.