[Bug 39015] New: Steam crashes shortly after login when DirectWrite is enabled

https://bugs.winehq.org/show_bug.cgi?id=39015

Bug ID: 39015
           Summary: Steam crashes shortly after login when DirectWrite is
                    enabled
           Product: Wine
           Version: 1.7.48
          Hardware: x86
               URL: https://steamcdn-a.akamaihd.net/client/installer/Steam
                    Setup.exe
                OS: Linux
            Status: NEW
          Keywords: download
          Severity: normal
          Priority: P2
         Component: dwrite
          Assignee: [e-mail]
          Reporter: [e-mail]
      Distribution: ---

Created attachment 51968
  --> https://bugs.winehq.org/attachment.cgi?id=51968
terminal output + backtrace

I don't know exactly what triggers the crash, it happens shortly (<1 min) after
logging into my Steam account. Disabling dwrite.dll or starting Steam with
'-no-dwrite' command line parameter makes the crash go away.
The crash happens whether or not corefonts is installed.
I have gameoverlayrenderer disabled otherwise this is in a clean prefix.

The minidump written by Steam always shows the same backtrace (see attached
log).

wine-1.7.48-74-gb3fe96a
Fedora 22
XOrg 1.17.2
XFCE 4.10