commit e786223d478f5de37d52339f6399a82bce4882a4
Author: himselfv <me@boku.ru>
Date:   Wed Mar 20 15:49:51 2013 +0400

    Fix: do not continue when wp_insert_user() returns error

diff --git a/includes/services/wsl.authentication.php b/includes/services/wsl.authentication.php
index ec5e86d..42e9840 100644
--- a/includes/services/wsl.authentication.php
+++ b/includes/services/wsl.authentication.php
@@ -495,6 +495,10 @@ function wsl_process_login_reauth()
 			$user_email , // ..
 		)
 		= wsl_process_login_create_wp_user( $provider, $hybridauth_user_profile, $request_user_login, $request_user_email );
+
+		//There was a bug when *_create_wp_user returned WP_Error, so just in case
+		if( !is_integer($user_id) )
+			return wsl_render_notices_pages( _wsl__("Invalid user_id returned by create_wp_user.", 'wordpress-social-login') );
 	}
 
 	// finally create a wp session for the user
@@ -873,12 +877,13 @@ function wsl_process_login_create_wp_user( $provider, $hybridauth_user_profile,
 	if( $user_id && is_integer( $user_id ) ){
 		update_user_meta( $user_id, $provider, $hybridauth_user_profile->identifier );
 	}
-	else if (is_wp_error($user_id)) {
-		echo $user_id->get_error_message();
-	}
-	else{
-		return wsl_render_notices_pages( _wsl__("An error occurred while creating a new user!", 'wordpress-social-login') );
-	} 
+	else {
+		// do not continue without user_id or we'll edit god knows what
+		if( is_wp_error($user_id) )
+			return wsl_render_notices_pages( _wsl__("An error occurred while creating a new user! ".$user_id->get_error_message(), 'wordpress-social-login') );
+		else
+			return wsl_render_notices_pages( _wsl__("An error occurred while creating a new user!", 'wordpress-social-login') );
+ 	}
 
 	// Send notifications 
 	if ( get_option( 'wsl_settings_users_notification' ) == 1 ){
@@ -899,6 +904,10 @@ function wsl_process_login_create_wp_user( $provider, $hybridauth_user_profile,
 
 function wsl_process_login_authenticate_wp_user( $user_id, $provider, $redirect_to, $adapter, $hybridauth_user_profile )
 {
+	//There was a bug when this function received non-integer user_id and updated random users, let's be safe
+	if( !is_integer($user_id) )
+		return wsl_render_notices_pages( _wsl__("Invalid user_id in login_authenticate_wp_user", 'wordpress-social-login') );
+
 	// calculate user age
 	$user_age = $hybridauth_user_profile->age;