Per r74946 CR, check whether realpath( $file ) returns false before using it

diff --git a/includes/libs/CSSMin.php b/includes/libs/CSSMin.php
index 081482b..945adde 100644 (file)
--- a/includes/libs/CSSMin.php
+++ b/includes/libs/CSSMin.php
@@ -99,10 +99,11 @@ class CSSMin {
                                $url .= '?' . gmdate( 'Y-m-d\TH:i:s\Z', round( filemtime( $file ), -2 ) );
                                // If we the mime-type can't be determined, no embedding will take place
                                $type = false;
+                               $realpath = realpath( $file );
                                // Try a couple of different ways to get the mime-type of a file, in order of preference
-                               if ( function_exists( 'finfo_file' ) && function_exists( 'finfo_open' ) ) {
+                               if ( $realpath && function_exists( 'finfo_file' ) && function_exists( 'finfo_open' ) ) {
                                        // As of PHP 5.3, this is how you get the mime-type of a file; it uses the Fileinfo PECL extension
-                                       $type = finfo_file( finfo_open( FILEINFO_MIME_TYPE ), realpath( $file ) );
+                                       $type = finfo_file( finfo_open( FILEINFO_MIME_TYPE ), $realpath );
                                } else if ( function_exists( 'mime_content_type' ) ) {
                                        // Before this was deprecated in PHP 5.3, this used to be how you get the mime-type of a file
                                        $type = mime_content_type( $file );