LD_PRELOAD não pode ser pré-carregado com o Dota 2

Question

Quando tento executar o Dota 2 com primusrun , isso me causa esse erro

ERROR: ld.so: object '/home/aleks/.local/share/Steam/ubuntu12_32/gameoverlayrenderer.so' from LD_PRELOAD cannot be preloaded (wrong ELF class: ELFCLASS32): ignored.

malloc: unknown:0: assertion botched
free: called with unallocated block argument
last command: (null)
Aborting...Aborted (core dumped)
Game removed: AppID 570 "Dota 2", ProcID 28915 
Installing breakpad exception handler for appid(steam)/version(1411443970)

e isso só acontece quando eu uso primusrun com steam .