Created attachment 37906 [details]
valgrind output

First reported at http://bugs.winehq.org/show_bug.cgi?id=20335.

A few patches were sent to wine to fix it, e.g., http://www.winehq.org/pipermail/wine-patches/2010-August/091903.html, but the maintainer has not committed them, saying it's probably an X.Org bug:
http://bugs.winehq.org/show_bug.cgi?id=20335#c1
"It sounds like it's hashing padding bytes. Probably should be reported to the
X.org folks."

so, I'm reporting to the X.Org folks :-).

To reproduce, you'll probably want to compile wine after installing valgrind. Then do:
$ ./wine notepad
to start an application, so that valgrind doesn't trace all of wine/wineserver, just the test application. Then, in a separate terminal, run:
$ valgrind --trace-children=yes --vex-iropt-precise-memory-exns=yes --workaround-gcc296-bugs=yes ./wine winemine

you'll get:
==14385== Conditional jump or move depends on uninitialised value(s)
==14385==    at 0x4F54A18: XcursorImageHash (in /usr/lib/libXcursor.so.1.0.2)
==14385==    by 0x4F54ED7: XcursorNoticePutBitmap (in /usr/lib/libXcursor.so.1.0.2)
==14385==    by 0x4DD6EF8: _XNoticePutBitmap (in /usr/lib/libX11.so.6.3.0)
==14385==    by 0x4DEE3A7: XPutImage (in /usr/lib/libX11.so.6.3.0)
==14385==    by 0x4D08D8F: X11DRV_DIB_SetImageBits (dib.c:3671)
==14385==    by 0x4D0CB49: X11DRV_SetDIBits (dib.c:4049)
==14385==    by 0x4AFF857: SetDIBits (dib.c:374)
==14385==    by 0x4B0000B: StretchDIBits (dib.c:261)
==14385==    by 0x49D6A64: CURSORICON_CreateIconFromBMI (cursoricon.c:860)
==14385==    by 0x49D6FC4: CreateIconFromResourceEx (cursoricon.c:1159)
==14385==    by 0x49D910F: CURSORICON_Load (cursoricon.c:1292)
==14385==    by 0x49D969F: LoadImageW (cursoricon.c:2392)
==14385== 

austin@laptop:~$ xdpyinfo | grep version
version number:    11.0
X.Org version: 1.7.6

Full valgrind output attached.