[Bug 54137] New: A non-WM_CLIPCHILDREN window's repaint region is not computed correctly when its child is resized or repositioned

[WineHQ Bugzilla]

https://bugs.winehq.org/show_bug.cgi?id=54137

Bug ID: 54137
           Summary: A non-WM_CLIPCHILDREN window's repaint region is not
                    computed correctly when its child is resized or
                    repositioned
           Product: Wine
           Version: 8.0-rc1
          Hardware: x86-64
                OS: Linux
            Status: UNCONFIRMED
          Severity: normal
          Priority: P2
         Component: wineserver
          Assignee: [e-mail]
          Reporter: [e-mail]
                CC: [e-mail]
   Regression SHA1: 33617af8145b6fadfe41d48968a728ff57b3064b
      Distribution: ---

Wine sometimes under-calculates the repaint region of non-WM_CLIPCHILDREN
non-WM_EX_COMPOSITED windows with a child window that has been resized or
repositioned.

Reported affected applications include regedit.exe and Unity Assets Bundle
Extractor.

The regression started with the following commit:

commit 33617af8145b6fadfe41d48968a728ff57b3064b
Author: Jinoh Kang 
Date:   Mon Oct 31 22:30:20 2022 +0900

server: Don't invalidate the newly exposed child region on the parent if it
doesn't clip children.

This partly reverts e42eaaaf3a873d29b14f8f3a3617df2d0d4210ca.

Signed-off-by: Jinoh Kang