Comment 12 for bug 416421

I experience a related bug when using KiCad:

[ 2507.868]
Backtrace:
[ 2507.868] 0: /usr/bin/X (xorg_backtrace+0x26) [0x566a86]
[ 2507.868] 1: /usr/bin/X (0x400000+0x16a6e9) [0x56a6e9]
[ 2507.868] 2: /lib/libpthread.so.0 (0x7fa9d12c8000+0xf8a0) [0x7fa9d12d78a0]
[ 2507.868] 3: /usr/lib/xorg/modules/libfb.so (fbBresSolid+0x21c) [0x7fa9cd94a1cc]
[ 2507.868] 4: /usr/lib/xorg/modules/libfb.so (fbSegment+0x3f7) [0x7fa9cd94b667]
[ 2507.868] 5: /usr/lib/xorg/modules/libfb.so (fbPolySegment32+0x4bd) [0x7fa9cd93f88d]
[ 2507.868] 6: /usr/lib/xorg/modules/drivers/intel_drv.so (0x7fa9ce380000+0x380cc) [0x7fa9ce3b80cc]
[ 2507.868] 7: /usr/lib/xorg/modules/drivers/intel_drv.so (0x7fa9ce380000+0x2f1ec) [0x7fa9ce3af1ec]
[ 2507.868] 8: /usr/bin/X (0x400000+0xf9a3f) [0x4f9a3f]
[ 2507.868] 9: /usr/bin/X (0x400000+0x302a3) [0x4302a3]
[ 2507.868] 10: /usr/bin/X (0x400000+0x33cb9) [0x433cb9]
[ 2507.868] 11: /usr/bin/X (0x400000+0x22eea) [0x422eea]
[ 2507.868] 12: /lib/libc.so.6 (__libc_start_main+0xed) [0x7fa9d017f38d]
[ 2507.868] 13: /usr/bin/X (0x400000+0x231dd) [0x4231dd]
[ 2507.868] Segmentation fault at address 0x7fa9cc816ffc

It is reproducible.

No idea why the intel driver symbols don't show up, but addr2line shows me:

0x380cc = xf86-video-intel-2.17.0/uxa/uxa-unaccel.c:24 = uxa_check_poly_segment()
0x2f1ec = xf86-video-intel-2.17.0/uxa/uxa-accel.c:624 = uxa_poly_segment()