text: #!/usr/bin/env python2.7
  #
  # Copyright 2017 gRPC authors.
  #
  # Licensed under the Apache License, Version 2.0 (the "License");
  # you may not use this file except in compliance with the License.
  # You may obtain a copy of the License at
  #
  #     http://www.apache.org/licenses/LICENSE-2.0
  #
  # Unless required by applicable law or agreed to in writing, software
  # distributed under the License is distributed on an "AS IS" BASIS,
  # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  # See the License for the specific language governing permissions and
  # limitations under the License.
  
  # Reads stdin to find error_refcount log lines, and prints reference leaks
  # to stdout
  
  # usage: python error_ref_leak < logfile.txt
  
  import re
  import sys
  
  data = sys.stdin.readlines()
  
  errs = []
  for line in data:
      # if we care about the line
      if re.search(r'error.cc', line):
          # str manip to cut off left part of log line
          line = line.partition('error.cc:')[-1]
          line = re.sub(r'\d+] ', r'', line)
          line = line.strip().split()
          err = line[0].strip(":")
          if line[1] == "create":
              assert (err not in errs)
              errs.append(err)
          elif line[0] == "realloc":
              errs.remove(line[1])
              errs.append(line[3])
          # explicitly look for the last dereference
          elif line[1] == "1" and line[3] == "0":
              assert (err in errs)
              errs.remove(err)
  
  print "leaked:", errs
  