Info: (grep) Reporting Bugs

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grep: Performance

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grep: Copying

grep: Reporting Bugs

 
 6 Reporting bugs
 ****************
 
 Bug reports can be found at the GNU bug report logs for ‘grep’
 (http://debbugs.gnu.org/cgi/pkgreport.cgi?package=grep).  If you find a
 bug not listed there, please email it to <bug-grep@gnu.org> to create a
 new bug report.
 
 6.1 Known Bugs
 ==============
 
 Large repetition counts in the ‘{n,m}’ construct may cause ‘grep’ to use
 lots of memory.  In addition, certain other obscure regular expressions
 require exponential time and space, and may cause ‘grep’ to run out of
 memory.
 
    Back-references are very slow, and may require exponential time.