Vim hangs with matchadd('...', '\%78v') and nowrap on large/long lines

[GoogleCodeExporter]

What steps will reproduce the problem?

1. wget 
https://gist.githubusercontent.com/blueyed/b098ff662b2963621ec0/raw/a6f5a88f43c3
f55a48bf89ddcad08c86ed2e67c9/test.diff
2. vim -u NONE -N test.diff
3. :set nowrap
3. :call matchadd('ColorColumn', '\%78v', 100)

What is the expected output? What do you see instead?

The virtual column 78 should get highlighted.

Instead, Vim hangs and has to be killed with signal 9.

What version of the product are you using? On what operating system?

7.4.560 (hg)

Original issue reported on code.google.com by dhahler@gmail.com on 6 Jan 2015 at 7:46

[GoogleCodeExporter]

can you try :set re=2?

Original comment by chrisbr...@googlemail.com on 8 Jan 2015 at 10:58

[GoogleCodeExporter]

Here is a patch, that mitigates the problem, by preventing matches impossible 
matches.

Original comment by chrisbr...@googlemail.com on 8 Jan 2015 at 11:16

Attachments:

• slow_matchadd_vcol.diff

[GoogleCodeExporter]

Thanks!

`:set re=2` did not appear to help, but the patch improves the behaviour.

It still takes ~2 seconds though to add the match.

Original comment by dhahler@gmail.com on 9 Jan 2015 at 10:58

[GoogleCodeExporter]

Sorry, I meant re=1 as this is actually the old engine. Can you test with that 
one?

Original comment by chrisbr...@googlemail.com on 10 Jan 2015 at 12:14

[GoogleCodeExporter]

That patch is wrong. Please use this new patch

Original comment by chrisbr...@googlemail.com on 13 Jan 2015 at 9:14

Attachments:

• slow_matchadd_vcol_v2.diff

[GoogleCodeExporter]

Original comment by chrisbr...@googlemail.com on 13 Jan 2015 at 9:14

• Added labels: patch

[GoogleCodeExporter]

Patch included as  7.4.577

Original comment by brammool...@gmail.com on 14 Jan 2015 at 5:38

• Changed state: Fixed