[Bug 55755] New: ntdll:wow64 - The 32-bit test_modules() fails to find the main module in Wine's new WoW mode

[WineHQ Bugzilla]

https://bugs.winehq.org/show_bug.cgi?id=55755

Bug ID: 55755
           Summary: ntdll:wow64 - The 32-bit test_modules() fails to find
                    the main module in Wine's new WoW mode
           Product: Wine
           Version: unspecified
          Hardware: x86-64
                OS: Linux
            Status: NEW
          Severity: normal
          Priority: P2
         Component: ntdll
          Assignee: [e-mail]
          Reporter: [e-mail]
      Distribution: ---

ntdll:wow64 - The 32-bit test_modules() fails to find the main module in Wine's
new WoW mode:

wow64.c:1568: Test failed: main module not found

See https://test.winehq.org/data/patterns.html#ntdll:wow64

In particular one can see this issue on fg-deb64-i386, fgtb-debian11-i386,
fgtb-debian12-i386 and rbernon-*-wow64 which all run the 32-bit tests in the
new Windows-on-Windows Wine mode. This failure does no happen in the 64-bit
test, or when running in a pure 32-bit environment or in the old
Windows-on-Windows mode.

This also happens on macOS when running the 32-bit tests in the new WoW mode
(see mac_rbernon-macos-*-wow64).

A bisect shows that this failure started with the commit below:

commit de81e2ea41b27a14f88177639c5b5d35a210b5bd
Author:     Alexandre Julliard 
AuthorDate: Fri Oct 6 15:08:02 2023 +0200

ntdll: Only create the main module on the 32-bit side for wow64.

This means this most likely has the same fix as bug 55744.