anchor.diff:  			     {format, internal}]),
       ok = disk_log:log_terms(n, [{this,is}]),
       ok = disk_log:sync(n),
  -    crash(File, 28), % the _binary_ is now invalid
  +    crash(File, 26), % the _binary_ is now invalid
       {error, {corrupt_log_file, File2}} = disk_log:chunk(n, start, 1),
       crash(File, 10),
       {error,{corrupt_log_file,_}} = disk_log:bchunk(n, start, 1),
  
positive.code:     ok = disk_log:close(n),
      {ok, n} = disk_log:open([{name, n}, {file, File}, {type, halt},
  			     {format, internal}, {mode, read_only}]),
      crash(File, 44), % the binary term {s} is now bad
      {J11, [{this,is}], 7} = disk_log:chunk(n, start, 10),
      {J21, [{on,a},{halt,file}]} = disk_log:chunk(n, J11),
      eof = disk_log:chunk(n, J21),
      ok = disk_log:close(n),
  
negative.code:     ok = disk_log:close(n),
      {ok, n} = disk_log:open([{name, n}, {file, File}, {type, halt},
  			     {format, internal}, {mode, read_only}]),
      crash(File, 46), % the binary term {some,terms} is now bad
      {J1, [{this,is}], 16} = disk_log:chunk(n, start, 10),
      {J2, [{on,a},{halt,file}]} = disk_log:chunk(n, J1),
      eof = disk_log:chunk(n, J2),
      ok = disk_log:close(n),
  