[Pkg-games-ubuntu] [Bug 725044] Re: graphic corruption while scrolling right

[Shining Arcanine]

This is caused by an optimization introduced in glibc that causes
memcpy() to copy in reverse. This breaks code that used memcpy() for
overlapping copies in violation of ANSI C. There is a bug at the Fedora
bug tracker documenting this where Linus Torvalds posted his two cents:

https://bugzilla.redhat.com/show_bug.cgi?id=638477

Anyway, the fix is to apply the patch at the libsdl bug tracker to
libsdl. While the fix is trivial, it would be problematic if a major
Linux distribution shipped a release with this bug in it. I suggest that
this be made a blocker to Ubuntu 11.04's release to ensure that this is
addressed before Ubuntu 11.04 ships next month.

Also, would the package maintainer take the initiative to notify his
Debian counterpart? I am the Gentoo Linux user that filed the Gentoo bug
about this and I don't plan to notify many more people. The only reason
I cared about this bug on Ubuntu to talk about it here is because it
affects someone I know.

** Bug watch added: Red Hat Bugzilla #638477
   https://bugzilla.redhat.com/show_bug.cgi?id=638477

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https://bugs.launchpad.net/bugs/725044

Title:
  SDL rendering issue: graphic corruption while scrolling right

Status in “libsdl1.2” package in Ubuntu:
  New
Status in “wesnoth-1.8” package in Ubuntu:
  Invalid
Status in Fedora:
  Unknown
Status in Gentoo Linux:
  Unknown

Bug description:
  Binary package hint: wesnoth-1.8

  using natty 11.04 with latest updates as of today (25.2)

  when playing and scrolling to the right the screen gets corrupted, scrolling up/down/left works as expected
  there is also a screenshot + a small diff available in the wesnoth forums ->
  http://forums.wesnoth.org/viewtopic.php?uid=109471&f=4&t=32423&start=0

  it happens using nouveau and nvidia binary driver..