[Bug 45134] New: World Racing 2 Demo installer shows crash dialog.

https://bugs.winehq.org/show_bug.cgi?id=45134

Bug ID: 45134
           Summary: World Racing 2 Demo installer shows crash dialog.
           Product: Wine
           Version: 3.7
          Hardware: x86-64
                OS: Linux
            Status: UNCONFIRMED
          Severity: normal
          Priority: P2
         Component: msi
          Assignee: [e-mail]
          Reporter: [e-mail]
      Distribution: ---

Created attachment 61320
  --> https://bugs.winehq.org/attachment.cgi?id=61320
git bisect, call stacks.

I am unsure if this is a real regression because there was already
in older wine versions a line "wine: Unhandled page" in the log,
but at least since following commit a crash dialog is opened
for msiexec.exe:
-----
commit 85d1fb62b321e890004bc8d0ded7a0183216c42d
Author: Zebediah Figura 
Date:   Wed Apr 25 20:54:40 2018 -0500

msi: Execute custom actions in a separate process.
-----

The call stack changed again since in this commit, but still
a crash dialog gets opened for msiexec.exe:
-----
commit 71c0738c0e2598d2af9e31e2e82b69e6a5081e51
Author: Zebediah Figura 
Date:   Fri Apr 27 09:37:46 2018 -0500

msi: Initialize [out] strings to NULL.
-----

Please see both call stacks in attached file.