[Bug 54001] New: user32:win - test_mdi() sometimes fails on Windows 8 and Windows 10 1607

[WineHQ Bugzilla]

https://bugs.winehq.org/show_bug.cgi?id=54001

            Bug ID: 54001
           Summary: user32:win - test_mdi() sometimes fails on Windows 8
                    and Windows 10 1607
           Product: Wine
           Version: unspecified
          Hardware: x86-64
                OS: Windows
            Status: NEW
          Severity: normal
          Priority: P2
         Component: user32
          Assignee: wine-bugs(a)winehq.org
          Reporter: fgouget(a)codeweavers.com

user32:win - test_mdi() sometimes fails on Windows 8 and Windows 10 1607:

win.c:2688: Test failed: style 0x200000: expected !100
win.c:2688: Test failed: style 0x300000: expected !100

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

More precisely:
* This failure mode happened systematically on w1064v1607 from 2022-08-24 to
2022-11-17 but there is no record of it ever happening outside that range.
* The w1064v1607 snapshot has been updated on 2022-11-20. While that may seem
to rule out the snapshot update as the cause for the change in behavior it is
possible that the successful 2022-11-18 results were (backlogged and) run on
the new 2022-11-20 snapshot.
* It's not clear what could have happened on 2022-08-24 to cause the failure to
start happening.

* This failure mode also happened on the w864 VM on the following dates:
  - 2022-06-03 w864-64 (twice)
  - 2022-11-18 w8adm (32-bit)
  - 2022-11-22 w8adm (32-bit)
  - 2022-11-23 w8adm (32-bit) and w864-32
  The w864 snapshot was last updated on 2022-06-06.

Because these failures are rare on Windows 8 they have caused some TestBot
false positives.

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[Bug 54001] user32:win - test_mdi() sometimes fails on Windows 8 and Windows 10 1607

[WineHQ Bugzilla]

https://bugs.winehq.org/show_bug.cgi?id=54001

François Gouget <fgouget(a)codeweavers.com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
           Keywords|                            |source, testcase

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[Bug 54001] user32:win - test_mdi() sometimes fails on Windows 8 and 10

[WineHQ Bugzilla]

https://bugs.winehq.org/show_bug.cgi?id=54001

François Gouget <fgouget(a)codeweavers.com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
            Summary|user32:win - test_mdi()     |user32:win - test_mdi()
                   |sometimes fails on Windows  |sometimes fails on Windows
                   |8 and Windows 10 1607       |8 and 10

--- Comment #1 from François Gouget <fgouget(a)codeweavers.com> ---
On 2022-11-29 this also happened on w1064v1507-32. So this can probably happen
on any Windows 8+ version.

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