The problem was that the error handling was using a too-small buffer to
  print the error message generated. We fix this by not using a buffer at
  all, but by using fprintf() directly. There were also some problems with
  the error handling in table dumping that was exposed by this fix that were
  also corrected.


client/mysqldump.c:
  Use fprintf() instead of my_printf_error() to avoid buffer overflow issues.
  Since ME_BELL wasn't specified, calling my_printf_error() offered no advantage
  except for adding my_progname, which we just go ahead and do manually. Also,
  fix the error handling in dumpTable() when queries to get data fail and --force
  was specified.
mysql-test/r/mysqldump.result:
  Add new results
mysql-test/t/mysqldump.test:
  Add new regression test