[Bug 89084] dungeon defenders crashes after vbo_exec_DrawRangeElements call

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=89084

--- Comment #4 from Eero Tamminen <eero.t.tamminen at intel.com> ---
(In reply to Karol Herbst from comment #3)
> Created attachment 113464 [details]
> valgrind output

Thanks!

> sadly I can't debug further with the steam version, so I have to check if I
> also have a non-steam version somwhere. But there are some invalid write of
> size 4 from mesa, which I think may libsdl2 or mesa bugs itself or maybe it
> should be that way.

This could be Valgrind not knowing where the memory came from.  Only if your
libdrm library is built with Valgrind devel files present in the system, it
will annotate the memory it returns from kernel for Valgrind.

On Ubuntu 14.10, the necessary files come with "valgrind" package, but libdrm
needs to be (re-)build after that is installed.

Another issue is that for Valgrind backtraces to be useful, Mesa debug symbols
are needed, so that we can see where (which source file/line) the Valgrind
warnings are coming from.

Could you fix those issues and attach updated Valgrind output?

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