PHP 5.5 Segfault

runme.php

<?php

class Test
{
    public static function a($path)
    {
        $contents = php_strip_whitespace($path);

        var_dump('content:');
        var_dump($contents);

        var_dump('test');
        var_dump(preg_replace('{.*}s', 'a', $contents));

        var_dump('starting');
        $contents = preg_replace('{<<<\'?(\w+)\'?(?:\r\n|\n|\r)(?:.*?)(?:\r\n|\n|\r)\\1(?=\r\n|\n|\r|;)}s', 'null', $contents);

        $contents = preg_replace('{"[^"\\\\]*(\\\\.[^"\\\\]*)*"|\'[^\'\\\\]*(\\\\.[^\'\\\\]*)*\'}', 'null', $contents);
        var_dump('done');

        return $contents;
    }
}

var_dump(Test::a(__DIR__.'/testcase.php') === "<?php\n namespace Foo; class StripNoise { public function test() { return null\n; } } ");

testcase.php

<?php

namespace Foo;

/**
 * class Fail { }
 */
class StripNoise
{
    public function test()
    {
        return <<<A
class Fail23
{
}
A
;
    }
}