[Bug 57669] New: Suspicious behavior of rundll32.exe

[WineHQ Bugzilla]

https://bugs.winehq.org/show_bug.cgi?id=57669

Bug ID: 57669
           Summary: Suspicious behavior of rundll32.exe
           Product: Wine
           Version: 10.0-rc2
          Hardware: x86-64
                OS: Linux
            Status: UNCONFIRMED
          Severity: normal
          Priority: P2
         Component: -unknown
          Assignee: [e-mail]
          Reporter: [e-mail]
      Distribution: ---

Created attachment 77844
  --> https://bugs.winehq.org/attachment.cgi?id=77844
trace - bad

I've upgraded a build environment with Wine/MSVC/LLCM from Debian Bullseye to
Bookworm and unfortunately it wasn't as easy as I expected. There is a problem
with rundll32.exe that I was finally able to isolate after lot of trial and
error.

The problem is on Debian Bookworm that the rundll32.exe process that is started
never reaches wWinMain (I put TRACE() at the beginning). I'm attaching the bad
trace log from Bookworm and the good trace from Bullseye.

A simple workaround for me now is to copy rundll32.exe from Bullseye.

Any ideas what to try next? Is this a hidden bug in Wine or Mingw compiler?

(setting component to unknown as rundll32 is missing in the list)