Ticket #44710: 44710.diff

wp-admin/includes/class-wp-upgrader.php

@@ -793 +793 @@
                 if ( is_wp_error( $result ) ) {
                         $this->skin->error( $result );
                         $this->skin->feedback( 'process_failed' );
+
+                        // If it's a theme or plugin, delete the uploaded one from uploads directory.
+                        if ( ! empty( $options['package'] ) && ! empty( $options['hook_extra']['type'] ) && ( 'plugin' === $options['hook_extra']['type'] || 'theme' === $options['hook_extra']['type'] ) ) {
+
+                                global $wp_filesystem;
+
+                                $wp_filesystem->delete( $options['package'] );
+                        }
                 } else {
                         // Installation succeeded.
                         $this->skin->feedback( 'process_success' );