[Bug 49746] New: crash when virtual debug channel is enabled

[WineHQ Bugzilla]

https://bugs.winehq.org/show_bug.cgi?id=49746

            Bug ID: 49746
           Summary: crash when virtual debug channel is enabled
           Product: Wine
           Version: 5.15
          Hardware: x86
                OS: Linux
            Status: NEW
          Keywords: regression
          Severity: normal
          Priority: P2
         Component: ntdll
          Assignee: wine-bugs at winehq.org
          Reporter: piotr.caban at gmail.com
   Regression SHA1: 4a7cd0f492affbc0eb347b97426b8c23f9a4f976
      Distribution: ---

Steps to reproduce:
WINEDBG=virtual wine winecfg

After running the command it starts printing debug traces and crashes with
"Segmentation fault" output. I've done the regression test with 32-bit wine but
there's identical crash on x86_64.

Bisect points to this commit:
4a7cd0f492affbc0eb347b97426b8c23f9a4f976 is the first bad commit
commit 4a7cd0f492affbc0eb347b97426b8c23f9a4f976
Author: Alexandre Julliard <julliard at winehq.org>
Date:   Thu Aug 20 15:27:30 2020 +0200

    ntdll: Call NtContinue() from LdrInitializeThunk() instead of returning.

    Signed-off-by: Alexandre Julliard <julliard at winehq.org>

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