[Bug 53256] New: user32:win - test_window_from_point() and test_mouse_input() sometimes fail on Windows 10 2009+

[WineHQ Bugzilla]

https://bugs.winehq.org/show_bug.cgi?id=53256

            Bug ID: 53256
           Summary: user32:win - test_window_from_point() and
                    test_mouse_input() sometimes fail on Windows 10 2009+
           Product: Wine
           Version: unspecified
          Hardware: x86-64
                OS: Windows
            Status: NEW
          Severity: normal
          Priority: P2
         Component: user32
          Assignee: wine-bugs at winehq.org
          Reporter: fgouget at codeweavers.com

user32:win - test_window_from_point() and test_mouse_input() sometimes fail on
Windows 10 2009+:

win.c:10238: Test failed: button under static window didn't get WM_LBUTTONUP
02fc:win: 10 tests executed (0 marked as todo, 1 failure), 0 skipped.
...
win.c:4549: Test failed: hwnd 00000000009C02AE/00000000009C02AE message 0204
win.c:4554: Test failed: hwnd 00000000009C02AE/00000000009C02AE message 0205
win.c:4559: Test failed: hwnd 00000000009C02AE/00000000009C02AE message 0206
win.c:4564: Test failed: hwnd 00000000009C02AE/00000000009C02AE message 0205
win.c:4580: Test failed: hwnd 00000000007902D6/00000000007902D6 message 0204
win.c:4584: Test failed: hwnd 00000000007902D6/00000000007902D6 message 0205
win.c:4593: Test failed: hwnd 00000000009C02AE/00000000009C02AE message 0204
win.c:4596: Test failed: hwnd 00000000009C02AE/00000000009C02AE message 0205
win.c:4629: Test failed: hwnd 00000000005C0340/00000000005C0340 message 00a4
win.c:4635: Test failed: hwnd 00000000005C0340/00000000005C0340 message 00a5
win.c:4642: Test failed: hwnd 00000000005C0340/00000000005C0340 message 0206
win.c:4644: Test failed: wparam 2
win.c:4655: Test failed: hwnd 00000000005C0340/00000000005C0340 message 0205

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

Where:
* 204 == WM_RBUTTONDOWN
* 205 == WM_RBUTTONUP
* 206 == WM_RBUTTONDBLCLK

Although they seem unrelated, the test_window_from_point() failure and the set
of 13 test_mouse_input() failures always happen together which means they
probably have a common cause.

Also these failures are usually rare but can be almost systematic at times, for
instance from 2022-04-25 to 2022-05-30 on w1064 32-bit.

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