[Solar-talk] Narrowing down the apache crash bug

[Andrew Shell]

I've tried to write a stand alone script with as little code as possible 
to replicate the error.
Here's what I got.
It doesn't seem to be a problem with preg_replace_callback or what we 
are returning.  It seems to be a combo of
whitespace chars and number of lines

<?php
// $text = str_repeat("<p>test\n</p>\n", 500);     // No Crash
// $text = str_repeat("<p>test</p>\n", 500);       // Crash
// $text = str_repeat("<p>test</p>\n", 5);         // No Crash
// $text = str_repeat("<p>test\r\n</p>\r\n", 500); // Crash
$text = str_repeat("<p>test\r\n</p>\r\n", 5);      // No Crash

$result = preg_replace("{
            (                           # save in $1
                ^                       # start of line  (with /m)
                <(p)                    # start tag = $2
                \\b                     # word break
                (.*\\n)*?               # any number of lines, minimally 
matching
                </\\2>                  # the matching end tag
                [ \\t]*                 # trailing spaces/tabs
                (?=\\n+|\\Z)            # followed by a newline or end 
of document
            )
    }xm",
    'x',
    $text
);

echo $result;
?>