# < git ls-remote /scratch/git/linus.git refs/heads/master
# < git rev-parse tmp/linus
remote == local, skipping fetch
# < git rev-parse tmp/linus
Upstream revision is f6cec0ae58c17522a7bc4e2f39dae19f199ab534
Head not built, building
# < git reset --mixed
# git branch -D linus
Deleted branch linus (was f6cec0a).
# git checkout -q -f -b linus tmp/linus
# < git ls-files --others --modified
# git ls-files --others --modified
cmd.log
# < /scratch/kisskb/prod/kisskb/kisskb3/backend/makewrap.py ARCH=arm O=/scratch/kisskb/prod/kisskb/kisskb3/backend/build/linus_versatile_defconfig_arm CROSS_COMPILE=/opt/crosstool/gcc-4.4.0-nolibc/arm-linux/bin/arm-linux-  -f kisskb-version.mk
makewrap: Added distcc to CROSS_COMPILE
makewrap: Distcc hosts = sprygo/32 localhost/16
makewrap: Added ccache to CROSS_COMPILE
makewrap: Using -j factor 128
# < /scratch/kisskb/prod/kisskb/kisskb3/backend/makewrap.py ARCH=arm O=/scratch/kisskb/prod/kisskb/kisskb3/backend/build/linus_versatile_defconfig_arm CROSS_COMPILE=/opt/crosstool/gcc-4.4.0-nolibc/arm-linux/bin/arm-linux-  versatile_defconfig
makewrap: Added distcc to CROSS_COMPILE
makewrap: Distcc hosts = sprygo/32 localhost/16
makewrap: Added ccache to CROSS_COMPILE
makewrap: Using -j factor 128
arch/arm/Kconfig:1187: invalid option
make[2]: *** [versatile_defconfig] Error 1
make[1]: *** [versatile_defconfig] Error 2
make: *** [sub-make] Error 2
make failed, trying to bisect ..
## bisect start
Last known good revision 2d53056973079e6c2ffc0d7ae3afbdd3d4f18ae3
# < git symbolic-ref HEAD
# < git merge-base 2d53056973079e6c2ffc0d7ae3afbdd3d4f18ae3 f6cec0ae58c17522a7bc4e2f39dae19f199ab534

# < git ls-files --others --modified
# git ls-files --others --modified
cmd.log
# git bisect reset linus
Already on 'linus'
# git bisect start
# git bisect bad
# git bisect good 2d53056973079e6c2ffc0d7ae3afbdd3d4f18ae3
Bisecting: 321 revisions left to test after this (roughly 8 steps)
[45d7f32c7a43cbb9592886d38190e379e2eb2226] Merge git://git.kernel.org/pub/scm/linux/kernel/git/cmetcalf/linux-tile
Trying f6cec0ae58c17522a7bc4e2f39dae19f199ab534

# < /scratch/kisskb/prod/kisskb/kisskb3/backend/makewrap.py ARCH=arm O=/scratch/kisskb/prod/kisskb/kisskb3/backend/build/linus_versatile_defconfig_arm CROSS_COMPILE=/opt/crosstool/gcc-4.4.0-nolibc/arm-linux/bin/arm-linux-  versatile_defconfig
makewrap: Added distcc to CROSS_COMPILE
makewrap: Distcc hosts = sprygo/32 localhost/16
makewrap: Added ccache to CROSS_COMPILE
makewrap: Using -j factor 128
arch/arm/Kconfig:1187: invalid option
make[2]: *** [versatile_defconfig] Error 1
make[1]: *** [versatile_defconfig] Error 2
make: *** [sub-make] Error 2
bisect failed f6cec0ae58c17522a7bc4e2f39dae19f199ab534

# git bisect bad
Bisecting: 163 revisions left to test after this (roughly 7 steps)
[d71048e22f47725a5808ea2e4e1e72fa36c1a788] Merge branch 'omap-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tmlind/linux-omap-2.6
# < git symbolic-ref HEAD
fatal: ref HEAD is not a symbolic ref
Traceback (most recent call last):
  File "/scratch/kisskb/prod/kisskb/kisskb3/backend/backend.py", line 151, in _do_build
    self.bisect()
  File "/scratch/kisskb/prod/kisskb/kisskb3/backend/backend.py", line 228, in bisect
    current = self.current_head_revid()
  File "/scratch/kisskb/prod/kisskb/kisskb3/backend/backend.py", line 253, in current_head_revid
    ref = call_pipe('git symbolic-ref HEAD', self.log).strip()
  File "/scratch/kisskb/prod/kisskb/kisskb3/backend/utils.py", line 32, in call_pipe
    raise CommandFailedException(cmd, p.returncode)
CommandFailedException: Failed running "git symbolic-ref HEAD" (128)