WordPress at a glance
function is not described

wp_cache_catch_404() WPSCache 1.0

Catch 404 requests. Themes that use query_posts() destroy $wp_query->is_404

No Hooks.

Return

Null. Nothing.

Usage

wp_cache_catch_404();

Code of wp_cache_catch_404() WPSCache 1.7.1

<?php
function wp_cache_catch_404() {
	global $wp_cache_404;
	if ( function_exists( '_deprecated_function' ) )
		_deprecated_function( __FUNCTION__, 'WP Super Cache 1.5.6' );
	$wp_cache_404 = false;
	if( is_404() )
		$wp_cache_404 = true;
}