[Bug 55063] New: gdi32:clipping - test_GetClipRgn() sometimes gets a NULL region on Windows

[WineHQ Bugzilla]

https://bugs.winehq.org/show_bug.cgi?id=55063

Bug ID: 55063
           Summary: gdi32:clipping - test_GetClipRgn() sometimes gets a
                    NULL region on Windows
           Product: Wine
           Version: unspecified
          Hardware: x86-64
                OS: Windows
            Status: NEW
          Severity: normal
          Priority: P2
         Component: gdi32
          Assignee: [e-mail]
          Reporter: [e-mail]

gdi32:clipping - test_GetClipRgn() sometimes gets a NULL region on Windows:

clipping.c:339: Test failed: Expected SelectClipRgn to return SIMPLEREGION, got
1
clipping.c:453: screen resolution 1024 x 768
clipping.c:471: Test failed: expected SIMPLEREGION, got 1
clipping.c:484: Test failed: RectVisible failed for (10,10)-(20,20)
clipping.c:488: Test failed: RectVisible failed for (20,20)-(10,10)
clipping.c:502: Test failed: expected SIMPLEREGION, got 1

See https://test.winehq.org/data/patterns.html#gdi32:clipping

This is quite rare, happening 8 times in the past 8 months, but somewhat
irregularly. Also, so far the failure has only happened on Windows 10 21H1,
21H2... and Windows 8:
* 2022-11-04 win21H1_newtb-w10pro64-he-64
* 2022-11-15 win21H2_newtb-w1064-tsign-32
* 2023-03-27 win21H1_newtb-w10pro64-ru-64
* 2023-04-05 win21H1_newtb-w10pro64-ja-64
* 2023-04-06 win21H1_newtb-w10pro64-en-AE-u8-64
* 2023-04-11 win21H1_newtb-w10pro64-64
* 2023-05-08 win81_newtb-w864-64
* 2023-06-06 win81_newtb-w864-64

So it's possible these failures are caused by interference from another test.