Comment 29 for bug 1475902

gdb backtrace:

[ideas] speed=duration:
Program received signal SIGSEGV, Segmentation fault.
0xb73603ed in ?? () from /usr/lib/i386-linux-gnu/dri/i915_dri.so
(gdb) backtrace
#0 0xb73603ed in ?? () from /usr/lib/i386-linux-gnu/dri/i915_dri.so
#1 0xb733bb5d in ?? () from /usr/lib/i386-linux-gnu/dri/i915_dri.so
#2 0xb733bbd0 in ?? () from /usr/lib/i386-linux-gnu/dri/i915_dri.so
#3 0xb7372d53 in ?? () from /usr/lib/i386-linux-gnu/dri/i915_dri.so
#4 0xb7326170 in ?? () from /usr/lib/i386-linux-gnu/dri/i915_dri.so
#5 0xb7326a82 in ?? () from /usr/lib/i386-linux-gnu/dri/i915_dri.so
#6 0xb7315d1e in ?? () from /usr/lib/i386-linux-gnu/dri/i915_dri.so
#7 0xb74cda28 in ?? () from /usr/lib/i386-linux-gnu/dri/i915_dri.so
#8 0xb73154f2 in ?? () from /usr/lib/i386-linux-gnu/dri/i915_dri.so
#9 0xb72feecb in ?? () from /usr/lib/i386-linux-gnu/dri/i915_dri.so
#10 0xb7315ae8 in ?? () from /usr/lib/i386-linux-gnu/dri/i915_dri.so
#11 0xb72fad06 in ?? () from /usr/lib/i386-linux-gnu/dri/i915_dri.so
#12 0xb72fb107 in ?? () from /usr/lib/i386-linux-gnu/dri/i915_dri.so
#13 0x080a8ff8 in Lamp::draw (this=0x82f23c0, modelview=..., projection=..., lightPositions=0x82f2558) at ../src/scene-ideas/lamp.cc:240
#14 0x080d2093 in SceneIdeasPrivate::draw (this=0x82f1978) at ../src/scene-ideas.cpp:367
#15 0x080547bc in MainLoop::draw (this=0x8194648) at ../src/main-loop.cpp:133
#16 0x08055103 in MainLoop::step (this=0x8194648) at ../src/main-loop.cpp:108
#17 0x08056ea9 in do_benchmark (canvas=...) at ../src/main.cpp:117
#18 0x0804ce5a in main (argc=1, argv=0xbffff5e4) at ../src/main.cpp:210
(gdb) frame 13
#13 0x080a8ff8 in Lamp::draw (this=0x82f23c0, modelview=..., projection=..., lightPositions=0x82f2558) at ../src/scene-ideas/lamp.cc:240
240 glDrawElements(GL_TRIANGLE_STRIP, 26, GL_UNSIGNED_SHORT, reinterpret_cast<const GLvoid*>(i * 26 * sus));
(gdb)