720   $ rm .hg/server.log

   721 

   722  if server crashed before hello, traceback will be sent to 'e' channel as

   723  last ditch:

   724 

   725   $ cat <<EOF >> .hg/hgrc

   726   > [cmdserver]

   727   > log = inexistent/path.log

   728   > EOF

   729   >>> from hgclient import unixserver, readchannel, check

   730   >>> server = unixserver('.hg/server.sock', '.hg/server.log')

   731   >>> def earlycrash(conn):

   732   ...     while True:

   733   ...         try:

   734   ...             ch, data = readchannel(conn)

   735   ...             if not data.startswith('  '):

   736   ...                 print '%c, %r' % (ch, data)

   737   ...         except EOFError:

   738   ...             break

   739   >>> check(earlycrash, server.connect)

   740   e, 'Traceback (most recent call last):\n'

   741   e, "IOError: *" (glob)

   742   >>> server.shutdown()

   743 

   744   $ cat .hg/server.log | grep -v '^  '

   745   listening at .hg/server.sock

   746   Traceback (most recent call last):

   747   IOError: * (glob)

   748   killed!