Index: wp-includes/plugin.php
IDEA additional info:
Subsystem: com.intellij.openapi.diff.impl.patch.CharsetEP
<+>UTF-8
===================================================================
--- wp-includes/plugin.php	(revision 37295)
+++ wp-includes/plugin.php	(revision )
@@ -675,13 +675,14 @@
 function plugin_basename( $file ) {
 	global $wp_plugin_paths;
 
+	$file = wp_normalize_path( $file );
+
 	foreach ( $wp_plugin_paths as $dir => $realdir ) {
 		if ( strpos( $file, $realdir ) === 0 ) {
 			$file = $dir . substr( $file, strlen( $realdir ) );
 		}
 	}
 
-	$file = wp_normalize_path( $file );
 	$plugin_dir = wp_normalize_path( WP_PLUGIN_DIR );
 	$mu_plugin_dir = wp_normalize_path( WPMU_PLUGIN_DIR );