http://bugs.winehq.org/show_bug.cgi?id=53257
--- Comment #4 from Stian Low wineryyyyy@gmail.com --- Once the emacs installer is resolved, remaining emacs runtime misbehaviors inside of Wine seem related to various cygwin bugs described by:
https://bugs.winehq.org/buglist.cgi?bug_status=UNCONFIRMED&bug_status=NE...
The most critical basic functionality is the ability to search files by name via find-name-dired and patterns within files via rgrep.
These most vital basic commands seem inhibited by cygwin find.exe which partially works but outputs the following message reported by those other bugs:
Cygwin WARNING: Couldn't compute FAST_CWD pointer. This typically occurs if you're using an older Cygwin version on a newer Windows. Please update to the latest available Cygwin version from https://cygwin.com/. If the problem persists, please see https://cygwin.com/problems.html
This message warning may be breaking what emacs expects as output from the find and grep commands.