dota2打不开

点击开始游戏，按钮变成停止，之后又变回开始游戏
ERROR: ld.so: object '/usr/lib/libextest.so' from LD_PRELOAD cannot be preloaded (wrong ELF class: ELFCLASS32): ignored.
steam.sh[7305]: Running Steam on gentoo 1.0.0.78-r1 64-bit
steam.sh[7305]: STEAM_RUNTIME is enabled by the user
ERROR: ld.so: object '/usr/lib/libextest.so' from LD_PRELOAD cannot be preloaded (wrong ELF class: ELFCLASS32): ignored.
ERROR: ld.so: object '/usr/lib/libextest.so' from LD_PRELOAD cannot be preloaded (wrong ELF class: ELFCLASS32): ignored.
setup.sh[7374]: Steam runtime environment up-to-date
ERROR: ld.so: object '/usr/lib/libextest.so' from LD_PRELOAD cannot be preloaded (wrong ELF class: ELFCLASS32): ignored.
run.sh[7386]: STEAM_RUNTIME_PREFER_HOST_LIBRARIES=0 is deprecated, and no longer has an effect.
ERROR: ld.so: object '/usr/lib/libextest.so' from LD_PRELOAD cannot be preloaded (wrong ELF class: ELFCLASS32): ignored.
steam.sh[7305]: Steam client's requirements are satisfied