Pure evil. Seen in code while doing some maintenance work. The poor code style adds extra enjoyment.

template.php

function mytheme_error_handler($errno, $message, $filename, $line, $context) {
    $aBypass = array(
        'Attempt to modify property of non-object',
				'expected to be a reference, value given',
    );
    foreach ($aBypass as $sTerm) {
        if (false !== strpos($message, $sTerm)) {
            return;
        }
    }
    return drupal_error_handler($errno, $message, $filename, $line, $context);
}