Hi
With the old engine, regexp \(\)\{2} does not match
and give E486: Pattern not found: \(\)\{2}
$ vim -c 'set hls re=1' \
-c 'call feedkeys("iaaa\<Esc>/\\(\\)\\{2}\<CR>")'
With the new engine, the same regexp matches
the entire line (which becomes highlighted):
$ vim -u NONE -c 'set hls re=2' \
-c 'call feedkeys("iaaa\<Esc>/\\(\\)\\{2}\<CR>")'
Regexp \(\)\{2} with nothing inside grouping
parenthesis does not seem to make sense.
Shouldn't it return an error instead?
Furthermore, the regexp \(\)\{80000} crashes
with a stack overflow when using the new regexp
only:
$ vim -c 'set hls re=2' \
-c 'call feedkeys("/\\(\\)\\{80000}\<CR>")'
Segmentation fault (core dumped)
I'm using vim-7.4.622 on Linux x86_64.
Regards
Dominique
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