[Bug 54424] New: user32:edit - test_dbcs_WM_CHAR() fails on Windows in mixed locales

[WineHQ Bugzilla]

https://bugs.winehq.org/show_bug.cgi?id=54424

Bug ID: 54424
           Summary: user32:edit - test_dbcs_WM_CHAR() fails on Windows in
                    mixed locales
           Product: Wine
           Version: unspecified
          Hardware: x86-64
                OS: Windows
            Status: NEW
          Severity: normal
          Priority: P2
         Component: user32
          Assignee: [e-mail]
          Reporter: [e-mail]

user32:edit - test_dbcs_WM_CHAR() fails on Windows in mixed locales:

edit.c:3407: Test failed: W: got L"\02c6\00ea\201c", expected
L"\4e00\4e8c\4e09"
edit.c:3412: Test failed: W: got "?e\x81gn?O", expected "\x88\xea\x93\xf1\x8eO"

See https://test.winehq.org/data/patterns.html#user32:edit

The failures happen in the w10pro64-mx-MX test configuration. What's special
about it is that it uses a mix of locales:

SystemDefaultLCID    0411
UserDefaultLCID    040c
ThreadLocale    0411
SystemPreferredUILanguages    0412,0409
UserDefaultUILanguage    0412
ThreadUILanguage    0412
Country    231
ACP    932

The failures started happening with the commit that introduced the new tests:

commit cbe3a39b647e029df16faf1dcce2958f1ee418d0
Author:     Akihiro Sagawa 
AuthorDate: Fri Jan 20 23:51:36 2023 +0900

user32/tests: Add DBCS WM_CHAR tests for edit control.