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

Status

closed

Product Version

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 "}"

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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