Here is log snippet:
446676992 opt/google/containers/android/system.raw.img
ERROR   : Target image has run out of space:
ERROR   : Filesystem     1M-blocks  Used Available Use% Mounted on
ERROR   : /dev/loop0          1723  1723         0 100% /mnt/host/source/src/build/images/pyro/R63-10032.14.0/rootfs
INFO    : Unmounting image from /mnt/host/source/src/build/images/pyro/R63-10032.14.0/stateful and /mnt/host/source/src/build/images/pyro/R63-10032.14.0/rootfs
Cleaning up /usr/local symlinks for /mnt/host/source/src/build/images/pyro/R63-10032.14.0/stateful/dev_image
An error occurred in your build so your latest output directory is invalid.
Running in non-interactive mode so deleting output directory.
Deleted /mnt/host/source/src/build/images/pyro/R63-10032.14.0
03:54:09: ERROR: 
return code: 1; command: /b/c/cbuild/repository/chromite/bin/cros_sdk 'PARALLEL_EMERGE_STATUS_FILE=/tmp/tmpAho49b' 'USE=-cros-debug chrome_internal afdo_use' 'FEATURES=separatedebug' 'CHROME_ORIGIN=LOCAL_SOURCE' -- ./build_image '--board=pyro' --replace '--version=10032.14.0' '--builder_path=pyro-release/R63-10032.14.0' base test
cmd=['/b/c/cbuild/repository/chromite/bin/cros_sdk', 'PARALLEL_EMERGE_STATUS_FILE=/tmp/tmpAho49b', u'USE=-cros-debug chrome_internal afdo_use', 'FEATURES=separatedebug', 'CHROME_ORIGIN=LOCAL_SOURCE', '--', './build_image', u'--board=pyro', '--replace', '--version=10032.14.0', u'--builder_path=pyro-release/R63-10032.14.0', 'base', 'test'], cwd=/b/c/cbuild/repository, extra env={'PARALLEL_EMERGE_STATUS_FILE': '/tmp/tmpAho49b', 'USE': u'-cros-debug chrome_internal afdo_use', 'FEATURES': 'separatedebug', 'CHROME_ORIGIN': 'LOCAL_SOURCE'}

Full log: https://uberchromegw.corp.google.com/i/chromeos_release/builders/pyro-release%20release-R63-10032.B/builds/12/steps/BuildImage%20%5Bafdo_use%5D/logs/stdio