[pmwiki-users] Intermittent Php error, seems to be in whitespace markup

John Rankin john.rankin at affinity.co.nz
Thu Feb 21 16:40:26 CST 2008

Since upgrading a site from 2.1.27 to 2.2beta65, I have 
been getting intermittent php errors:

ERROR: pat=/^\s+ #1/ex Compilation failed: 
unmatched parentheses at offset 8

This pattern is used in the scripts/stdmarkup.php to
support the '^ws' markup rule and the pattern has 
changed since pmwiki 2.1.27. This appears to be the 
only place it's used. In 2.1.27, the pattern was 

Unfortunately, I can't reproduce this on demand and 
reloading the page makes the problem go away -- it only 
happens from time to time, with no obvious pattern.

Also, even though action=diag says $EnableWSPre = 1,
lines that start with spaces are being wrapped in
<p> tags instead of <pre>.

I found one other reference to this problem in the mail 
archive, but no solution. I wonder if it's a php version

The site is running under Apache/1.3.26 PHP/4.1.2
Debian GNU/Linux

Any ideas how to fix this? I have temporarily changed the
2 whitespace rules to their 2.1.27 values. Now the <pre>
is back, but indents within things like lists do not work 
correctly. I'm tinkering, but not really making progress.

Any help or suggestions would be appreciated. Thanks.
John Rankin
Affinity Limited
T 64 4 495 3737
F 64 4 473 7991
john.rankin at affinity.co.nz

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