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http://bugs.exim.org/show_bug.cgi?id=1484
Summary: Problem with named subpattern in a condition on
recursion
Product: PCRE
Version: 8.33
Platform: Macintosh
OS/Version: MacOS X
Status: NEW
Severity: bug
Priority: medium
Component: Code
AssignedTo: ph10@???
ReportedBy: lingtalfi@???
QAContact: lingtalfi@???
CC: pcre-dev@???
Description:
------------
Using PHP Version 5.5.8 on macOSX 10.8.5
PCRE Library Version 8.33 2013-05-28
I may be wrong, but I think there is a problem with the PCRE library.
The test is here (using php):
http://ideone.com/NuORid
The perl equivalent test is here:
http://ideone.com/RGHaLK
Now, I know perl and pcre are two different flavours, but in this case,
I was expecting the same behaviour.
About the php test:
I tried to use a condition on a recursion (which is supposed to always fail at
the top level).
The condition has two alternatives: the yes condition and the no condition.
In the subject, there is no recursion at all, so the second alternative should
be used,
and the first alternative ignored.
It seems that the pattern match only if the first alternative doesn't use a
duplicate named subpattern,
or, alternatively, if a backreference to the named subpattern uses the numbered
version of the
subpattern (and not the name).
Test script:
---------------
http://ideone.com/NuORid
Expected result:
----------------
The script
http://ideone.com/NuORid should output "ok"
Actual result:
--------------
The script
http://ideone.com/NuORid outputs "oops"
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