Comment # 15 on bug 81680 from Eugene

There are only two r600_dri.so files:

locate r600_dri.so
/usr/lib/i386-linux-gnu/dri/r600_dri.so
/usr/lib/x86_64-linux-gnu/dri/r600_dri.so

And trying the one in i386-linux-gnu directory gives nothing. Only x86_64
version gives something
(https://crash-stats.mozilla.com/report/index/b964df8c-1a33-4302-ba89-686422140811):

addr2line 0x1ee641 -e /usr/lib/x86_64-linux-gnu/dri/r600_dri.so 
/build/buildd/mesa-10.3~git1408111930.904ed3+gallium/build/dri/src/mesa/../../../../src/gallium/auxiliary/util/u_inlines.h:151

addr2line 0x1c0669 -e /usr/lib/x86_64-linux-gnu/dri/r600_dri.so 
/build/buildd/mesa-10.3~git1408111930.904ed3+gallium/build/dri/src/mesa/../../../../src/mesa/state_tracker/st_cb_texture.c:157

addr2line 0x14da8d -e /usr/lib/x86_64-linux-gnu/dri/r600_dri.so 
/build/buildd/mesa-10.3~git1408111930.904ed3+gallium/build/dri/src/mesa/../../../../src/mesa/main/shared.c:298

addr2line 0x940bb -e /usr/lib/x86_64-linux-gnu/dri/r600_dri.so 
/build/buildd/mesa-10.3~git1408111930.904ed3+gallium/build/dri/src/mesa/../../../../src/mesa/main/context.c:1255

addr2line 0x1c47e0 -e /usr/lib/x86_64-linux-gnu/dri/r600_dri.so 
/build/buildd/mesa-10.3~git1408111930.904ed3+gallium/build/dri/src/mesa/../../../../src/mesa/state_tracker/st_context.c:333

addr2line 0x29adce -e /usr/lib/x86_64-linux-gnu/dri/r600_dri.so 
/build/buildd/mesa-10.3~git1408111930.904ed3+gallium/build/dri/src/gallium/state_trackers/dri/../../../../../../src/gallium/state_trackers/dri/dri_context.c:194

addr2line 0x2977f2 -e /usr/lib/x86_64-linux-gnu/dri/r600_dri.so 
/build/buildd/mesa-10.3~git1408111930.904ed3+gallium/build/dri/src/mesa/drivers/dri/common/../../../../../../../src/mesa/drivers/dri/common/dri_util.c:487