[Bug 48274] Regression - wine-staging 4.21 fails to initialize wineprefix (shared wow64 build - 64-bit thunk)

[WineHQ Bugzilla]

https://bugs.winehq.org/show_bug.cgi?id=48274

Olivier F. R. Dierick  changed:

What    |Removed                     |Added
----------------------------------------------------------------------------
           Keywords|                            |regression
            Product|Wine                        |Wine-staging
          Component|-unknown                    |-unknown
            Summary|Initialization of           |Regression - wine-staging
                   |wineprefix failed           |4.21 fails to initialize
                   |                            |wineprefix (shared wow64
                   |                            |build - 64-bit thunk)
           Severity|blocker                     |major
    Regression SHA1|                            |5fbf201ea8b61b09540905a98fa
                   |                            |edfe3ab15e0bd
     Ever confirmed|0                           |1
                 CC|                            |[e-mail]
                   |                            |, [e-mail]
             Status|UNCONFIRMED                 |NEW

--- Comment #2 from Olivier F. R. Dierick  ---
Hello,

Thanks for reporting the issue.

Confirming the issue.

I have it too since 4.21 release.
Only affects shared wow64 build of wine-staging.

Reducing severity to major.

Regression test shows that the regression is in
winebuild-Fake_Dlls/0010-tools-winebuild-Add-syscall-thunks-for-64-bit.patch

Reverting wine-staging commits 5fbf201 and 0c89d96 make wine-staging usable
again.

The attached patch makes wine-staging usable again.

$ gcc --version
gcc (Debian 4.9.2-10+deb8u2) 4.9.2

Debian 8 jessie amd64.

Regards.