changelog: handle decoding of NULs in extra more carefully (issue3156)
Escaped NULs adjacent to [0-7] could be decoded as octal. This hits
about 0.24% of changesets with transplant, which stores binary nodes.
#!/usr/bin/env python
import errno, os, sys
for f in sys.argv[1:]:
try:
print f, '->', os.readlink(f)
except OSError, err:
if err.errno != errno.EINVAL:
raise
print f, 'not a symlink'
sys.exit(0)