[Bug 45546] New: Magic The Gathering Arena updater crashes with Unhandled exception

https://bugs.winehq.org/show_bug.cgi?id=45546

Bug ID: 45546
           Summary: Magic The Gathering Arena updater crashes with
                    Unhandled exception
           Product: Wine
           Version: 3.13
          Hardware: x86-64
                OS: Linux
            Status: UNCONFIRMED
          Severity: normal
          Priority: P2
         Component: -unknown
          Assignee: [e-mail]
          Reporter: [e-mail]
      Distribution: ---

Created attachment 61954
  --> https://bugs.winehq.org/attachment.cgi?id=61954
Backtrace produced with UI

$ wine --version
wine-3.13 (Staging)

$ uname -a
Linux bcube 4.17.11-arch1 #1 SMP PREEMPT Sun Jul 29 10:11:16 UTC 2018 x86_64
GNU/Linux

$ lsb_release -a
LSB Version:    1.4
Distributor ID:    Arch
Description:    Arch Linux
Release:    rolling
Codename:    n/a

Using win32 prefix on 64bit OS.

====

The game seems to install fine, even though some errors pop up during the set
up.

After running MTGA.exe, the game uses an in-engine (Unity) downloading process
for updates.
The updater is able to download some files, and also able to continue when
restarted, but most of the times the following error is produced.

This Unity engine error is showed as a pop up window:
Fatal error in gc, GetThreadContext failed

After closing the error popup wine reports an Unhandled exception:
wine: Unhandled exception 0x80000003 in thread 95 at address 0x7bcab4ec (thread
0095), starting debugger...