[Bug 52423] New: GdipDeleteRegion in some cases try to delete NULL elements

[WineHQ Bugzilla]

https://bugs.winehq.org/show_bug.cgi?id=52423

Bug ID: 52423
           Summary: GdipDeleteRegion in some cases try to delete NULL
                    elements
           Product: Wine
           Version: 7.0-rc6
          Hardware: x86-64
                OS: Linux
            Status: UNCONFIRMED
          Severity: normal
          Priority: P2
         Component: gdiplus
          Assignee: [e-mail]
          Reporter: [e-mail]
      Distribution: ---

Created attachment 71682
  --> https://bugs.winehq.org/attachment.cgi?id=71682
error log

In an application with a complex form, it sometimes arises an exception read
access to 0x0000000000000000 in delete_element

[Bug 52423] GdipDeleteRegion in some cases try to delete NULL elements

[WineHQ Bugzilla]

https://bugs.winehq.org/show_bug.cgi?id=52423

--- Comment #1 from Konstantin  ---
Unfortunately, the error occurs when working with a heavy WinForms application
under Wine-Mono, an attempt to repeat his behavior in the test example does not
give the desired result. The error itself is randomly apear when the user is
working with forms - editing and copying text.

Detailed testing has shown that the proposed patch does not solve the problem
completely. WINEDEBUG=gdiplus did not give useful information.

[Bug 52423] GdipDeleteRegion in some cases try to delete NULL elements

[WineHQ Bugzilla]

https://bugs.winehq.org/show_bug.cgi?id=52423

--- Comment #2 from Konstantin  ---
Created attachment 71685
  --> https://bugs.winehq.org/attachment.cgi?id=71685
log with WINEDEBUG=gdiplus

[Bug 52423] GdipDeleteRegion in some cases try to delete NULL elements

[WineHQ Bugzilla]

https://bugs.winehq.org/show_bug.cgi?id=52423

--- Comment #3 from Esme Povirk  ---
I'd try a warn+heap log to rule out some memory errors.

If not, I think we need a complete log with +heap,+gdiplus so we can find out
how the troublesome region is created and used.

[Bug 52423] GdipDeleteRegion in some cases try to delete NULL elements

[WineHQ Bugzilla]

https://bugs.winehq.org/show_bug.cgi?id=52423

Konstantin  changed:

What    |Removed                     |Added
----------------------------------------------------------------------------
         Resolution|---                         |NOTOURBUG
             Status|UNCONFIRMED                 |RESOLVED

--- Comment #4 from Konstantin  ---
The error was caused by incorrect work with memory in the user application

[Bug 52423] GdipDeleteRegion in some cases try to delete NULL elements

[WineHQ Bugzilla]

https://bugs.winehq.org/show_bug.cgi?id=52423

Esme Povirk  changed:

What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |[e-mail]