old_contents: try:
      import ure as re
  except ImportError:
      try:
          import re
      except ImportError:
          print("SKIP")
          raise SystemExit
  
  r = re.compile(".+")
  m = r.match("abc")
  print(m.group(0))
  try:
      m.group(1)
  except IndexError:
      print("IndexError")
  
  # conversion of re and match to string
  str(r)
  str(m)
  
  r = re.compile("(.+)1")
  m = r.match("xyz781")
  print(m.group(0))
  print(m.group(1))
  try:
      m.group(2)
  except IndexError:
      print("IndexError")
  
  r = re.compile("[a-cu-z]")
  m = r.match("a")
  print(m.group(0))
  m = r.match("z")
  print(m.group(0))
  m = r.match("d")
  print(m)
  m = r.match("A")
  print(m)
  print("===")
  
  r = re.compile("[^a-cu-z]")
  m = r.match("a")
  print(m)
  m = r.match("z")
  print(m)
  m = r.match("d")
  print(m.group(0))
  m = r.match("A")
  print(m.group(0))
  
  
  r = re.compile("o+")
  m = r.search("foobar")
  print(m.group(0))
  try:
      m.group(1)
  except IndexError:
      print("IndexError")
  
  
  m = re.match(".*", "foo")
  print(m.group(0))
  
  m = re.search("w.r", "hello world")
  print(m.group(0))
  
  m = re.match('a+?', 'ab');  print(m.group(0))
  m = re.match('a*?', 'ab');  print(m.group(0))
  m = re.match('^ab$', 'ab'); print(m.group(0))
  m = re.match('a|b', 'b');   print(m.group(0))
  m = re.match('a|b|c', 'c'); print(m.group(0))
  
  # Case where anchors fail to match
  r = re.compile("^b|b$")
  m = r.search("abc")
  print(m)
  
  try:
      re.compile("*")
  except:
      print("Caught invalid regex")
  
  # bytes objects
  m = re.match(rb'a+?', b'ab');  print(m.group(0))
  
new_contents: try:
      import ure as re
  except ImportError:
      try:
          import re
      except ImportError:
          print("SKIP")
          raise SystemExit
  
  r = re.compile(".+")
  m = r.match("abc")
  print(m.group(0))
  try:
      m.group(1)
  except IndexError:
      print("IndexError")
  
  # conversion of re and match to string
  str(r)
  str(m)
  
  r = re.compile("(.+)1")
  m = r.match("xyz781")
  print(m.group(0))
  print(m.group(1))
  try:
      m.group(2)
  except IndexError:
      print("IndexError")
  
  r = re.compile("[a-cu-z]")
  m = r.match("a")
  print(m.group(0))
  m = r.match("z")
  print(m.group(0))
  m = r.match("d")
  print(m)
  m = r.match("A")
  print(m)
  print("===")
  
  r = re.compile("[^a-cu-z]")
  m = r.match("a")
  print(m)
  m = r.match("z")
  print(m)
  m = r.match("d")
  print(m.group(0))
  m = r.match("A")
  print(m.group(0))
  print("===")
  
  # '-' character within character class block
  print(re.match("[-a]+", "-a]d").group(0))
  print(re.match("[a-]+", "-a]d").group(0))
  print("===")
  
  r = re.compile("o+")
  m = r.search("foobar")
  print(m.group(0))
  try:
      m.group(1)
  except IndexError:
      print("IndexError")
  
  
  m = re.match(".*", "foo")
  print(m.group(0))
  
  m = re.search("w.r", "hello world")
  print(m.group(0))
  
  m = re.match('a+?', 'ab');  print(m.group(0))
  m = re.match('a*?', 'ab');  print(m.group(0))
  m = re.match('^ab$', 'ab'); print(m.group(0))
  m = re.match('a|b', 'b');   print(m.group(0))
  m = re.match('a|b|c', 'c'); print(m.group(0))
  
  # Case where anchors fail to match
  r = re.compile("^b|b$")
  m = r.search("abc")
  print(m)
  
  try:
      re.compile("*")
  except:
      print("Caught invalid regex")
  
  # bytes objects
  m = re.match(rb'a+?', b'ab');  print(m.group(0))
  
subject: Add test for '-' in character class in regex.