import re
re.compile(r'\A[+-]?\d+') # $ charSet=2:6
re.compile(r'(?P<name>[\w]+)|') # $ charSet=9:13
re.compile(r'\|\[\][123]|\{\}') # $ charSet=6:11
re.compile(r'[^A-Z]') # $ charSet=0:6
re.compile("[]]") # $ charSet=0:3
re.compile("[][]") # $ charSet=0:4
re.compile("[^][^]") # $ charSet=0:6
re.compile("[.][.]") # $ charSet=0:3 charSet=3:6
re.compile("[[]]") # $ charSet=0:3
re.compile("[^]]") # $ charSet=0:4
re.compile("[^-]") # $ charSet=0:4

try:
    re.compile("[]-[]") # $ SPURIOUS: charSet=0:5
    raise Exception("this should not be reached")
except re.error:
    pass

try:
    re.compile("[^]-[]") # $ SPURIOUS: charSet=0:6
    raise Exception("this should not be reached")
except re.error:
    pass

re.compile("]]][[[[]") # $ charSet=3:8

#Half Surrogate pairs
re.compile(u'[\uD800-\uDBFF][\uDC00-\uDFFF]') # $ charSet=0:5 charSet=5:10
#Outside BMP
re.compile(u'[\U00010000-\U0010ffff]') # $ charSet=0:5

#Misparsed
re.compile(r"\[(?P<txt>[^[]*)\]\((?P<uri>[^)]*)") # $ charSet=10:14 charSet=28:32

 # parses wrongly, sees this   \|/ as a char set start
re.compile(r'''(?:[\s;,"'<>(){}|[\]@=+*]|:(?![/\\]))+''') # $ charSet=3:25 charSet=30:35