On further thought, we shouldn't be encouraging palindromish REs in the manual,
so that naive users aren't drawn into this mess. So I installed the attached
further patch to the documentation.
Of course it would be better to fix the back-reference bugs but this is low
priority and I doubt whether
On 5/10/17 1:48 AM, Sundeep Agarwal wrote:
> my question is whether these regular expression examples come under
> 'obscure regular expressions' mentioned in the man page.
No, they're bugs in grep's regular expression implementation, which is taken
from glibc. I filed a bug report against glibc h
Hello,
>From the man page, version 'grep (GNU grep) 2.25'
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
