Comment # 4 on bug 86832 from Sylvain BERTRAND

up-to-date fedora rawhide, but dota2 is a 32 bits app:
Name        : mesa-libGL
Arch        : i686
Version     : 10.5.0
Release     : 0.devel.2.3d9c1a9.fc22
Size        : 783 k
Repo        : installed
>From repo   : rawhide
Summary     : Mesa libGL runtime libraries and DRI drivers
URL         : http://www.mesa3d.org
License     : MIT
Description : Mesa libGL runtime library.