0004974: Regex PCRE recursion (balancing groups) isn't working as expected in Quercus

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Category

Severity

Reproducibility

Date Submitted

Last Update

0004974

[Quercus]

minor

always

03-02-12 09:17

01-05-13 23:22

Reporter

nemostein

View Status

public

Assigned To

nam

Priority

normal

Resolution

fixed

Platform

Status

closed

Projection

none

OS Version

ETA

none

Fixed in Version

4.0.34

Product Version

Product Build

Summary

0004974: Regex PCRE recursion (balancing groups) isn't working as expected in Quercus

Description

When using a regex with recursive matching "(?R)" the result isn't what is expected.

______________________________
How to reproduce:
Run the following snippet

$subject = "{a{b{c}d}e}";
preg_match_all("
/
    {(
        (?:
            [^{}] | (?R)
        )*
    )}

/ixsm", $subject, $matches);
print_r($matches);

______________________________
What was expected:

Array
(
    [0] => Array
        (
            [0] => {a{b{c}d}e} // The whole match
        )

    [1] => Array
        (
            [0] => a{b{c}d}e // The 1st group
        )

)

______________________________
What is the result:

Array
(
    [0] => Array
        (
            [0] => {a{b{c}d}e} // The whole match is OK!
        )

    [1] => Array
        (
            [0] => c}d}e // The 1st group isn't.
        )

)

______________________________

The main problem is that the balance died at firs occurrence of "}"

Steps To Reproduce

Additional Information

I'm using the Quercus bundle in the maven repository at:
http://caucho.com/m2/com/caucho/resin/4.0.23/ [^]

<dependency>
    <groupId>com.caucho</groupId>
    <artifactId>resin</artifactId>
    <version>4.0.23</version>
</dependency>

Attached Files

Relationships

Notes
(0006145) nam 01-05-13 23:22	php/4eq2 php/4eq3 Fixed for 4.0.34.

Issue History
Date Modified	Username	Field	Change
03-02-12 09:17	nemostein	New Issue
01-05-13 23:22	nam	Status	new => assigned
01-05-13 23:22	nam	Assigned To	=> nam
01-05-13 23:22	nam	Status	assigned => closed
01-05-13 23:22	nam	Note Added: 0006145
01-05-13 23:22	nam	Resolution	open => fixed
01-05-13 23:22	nam	Fixed in Version	=> 4.0.34

Mantis 1.0.0rc3[^]

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