[Bug 50049] New: Fallout 76 opens black screen then crashes on start

[WineHQ Bugzilla]

https://bugs.winehq.org/show_bug.cgi?id=50049

Bug ID: 50049
           Summary: Fallout 76 opens black screen then crashes on start
           Product: Wine
           Version: 5.19
          Hardware: x86-64
                OS: Linux
            Status: NEW
          Severity: normal
          Priority: P2
         Component: -unknown
          Assignee: [e-mail]
          Reporter: [e-mail]
      Distribution: ---

Created attachment 68502
  --> https://bugs.winehq.org/attachment.cgi?id=68502
terminal output wine 5.19

Hello,

There is a free week for Fallout 76, so I tested it.

Installing Bethesda.net launcher and downloading the game goes without issues
(I only had to use 'winetricks corefonts', to please CEF).

At first the game failed to start because it couldn't find XD3DAudio2_7.dll.
I worked around that with 'winetricks xact_x64'.

The game doesn't start (opens a black screen then crashes).

I saw on the AppDB [1] mentions of known issues and a lutris script that works
around them. I tried to replicate the script manually but nothing from it does
fix the present crash.

The Steam version is also affected. It appears that the issue appeared after an
update to the game ([2], [3]).

People have reported the issue on the Steam Proton github. [4]

Using DXVK, vcrun2012 and/or wine-staging doesn't fix the issue.

Someone said that using a native dbghelp.dll works around the issue. I didn't
test that.
> 018c:fixme:dbghelp_dwarf:dwarf2_parse_const_type Unsupported children

That line appears in the log and is similar to bug 41286, but it might just be
a side effect and not the actual cause of the crash.

[1] https://appdb.winehq.org/objectManager.php?sClass=version&iId=37660

[2] https://steamcommunity.com/app/1151340/discussions/0/2962764912486941912/
[3] https://steamcommunity.com/app/1151340/discussions/0/2965016081077718322/

[4] https://github.com/ValveSoftware/Proton/issues/3766

Regards.