[Bug 39839] winefile: Unhandled page fault if root directory window refreshed

https://bugs.winehq.org/show_bug.cgi?id=39839

--- Comment #10 from Jeff D. Hanson  ---
The problem occurs when z: is not linked to the / directory.

I delete it out of paranoia about apps having easy access to my entire
directory structure.  The script I use to set up my default WINEPREFIX
directory for app testing maps all unused drives (anything other than c: and
optical drives) to /dev/null and special folders to a specific subdirectory. 
If z: is mapped to /dev/null or missing then winefile errors when initial
(empty) "unix\home<user>" window is refreshed.

wine-devel 3.0~rc3~xenial (from winehq.org)