Charlie Hubbard created GROOVY-10634:
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Summary: Regular expressions cause groovysh 3.0.10 to crash
Key: GROOVY-10634
URL: https://issues.apache.org/jira/browse/GROOVY-10634
Project: Groovy
Issue Type: Bug
Components: Groovy Console
Affects Versions: 3.0.10
Environment: Groovy Shell (3.0.10, JVM: 17.0.2)
Type ':help' or ':h' for help.
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groovy:000>
Reporter: Charlie Hubbard
Attachments: regex-matcher-group-4.txt, regex-matcher-group.txt,
regular-expression-parsing-exception.txt
Running some of these expressions in groovysh will crash the shell. The
expectation is the print the exception to the console, and return to the next
prompt without exiting the shell. (see attached for stack trace
regular-expression-parsing-exception.txt).
{code:java}
groovy:000>
"[email protected]".matches(/^([a-zA-Z0-9_-.]+)@((\[[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\.)|(([a-zA-Z0-9\-]+\.)+))([a-zA-Z]{2,4}|[0-9]{1,3})(\]?)$/)
{code}
This however, will NOT crash it (notice the escaping for the hyphen in the
first [] expression):
{code:java}
groovy:000>
"[email protected]".matches(/^([a-zA-Z0-9_\-.]+)@((\[[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\.)|(([a-zA-Z0-9\-]+\.)+))([a-zA-Z]{2,4}|[0-9]{1,3})(\]?)$/)
{code}
This will also crash it (stacktrace regex-matcher-group.txt):
{code:java}
groovy:000> m = (~/^((\d{4})(\s|-)?){4}$/).matcher( "4199 6238 0343 4807" )
===> java.util.regex.Matcher[pattern=^((\d{4})(\s|-)?){4}$ region=0,19
lastmatch=]
groovy:000> m.group(0) {code}
If you don't call `.matches()` before calling `.group()` then it will produce
the crash. However, if you do call `.matches()` the the following will crash
it (stacktrace regex-matcher-group-4.txt):
{code:java}
groovy:000> m = (~/^((\d{4})(\s|-)?){4}$/).matcher( "4199 6238 0343 4807" )
===> java.util.regex.Matcher[pattern=^((\d{4})(\s|-)?){4}$ region=0,19
lastmatch=]
groovy:000> m.matches()
===> true
groovy:000> m.group(0)
===> 4199 6238 0343 4807
groovy:000> m.group(1)
===> 4807
groovy:000> m.group(2)
===> 4807
groovy:000> m.group(3)
===>
groovy:000> m.group(4)
ERROR java.lang.IndexOutOfBoundsException: {code}
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