diff --git a/src/Site/Controller/User.php b/src/Site/Controller/User.php
index c22dd07..f0055a4 100644
--- a/src/Site/Controller/User.php
+++ b/src/Site/Controller/User.php
@@ -173,7 +173,6 @@ class User {
       $tmpl->assign('custCss', false);
       $tmpl->assign('menu', $this->getMenu());
       $tmpl->assign('description', $description);
-      $tmpl->assign('error', $error);
       $tmpl->assign('user', $user);
       $tmpl->assign('u', $u);
 
diff --git a/src/Site/Lib/Auth.php b/src/Site/Lib/Auth.php
index 4f6f80e..e3700c1 100644
--- a/src/Site/Lib/Auth.php
+++ b/src/Site/Lib/Auth.php
@@ -189,7 +189,7 @@ class Auth {
     $user = new \stdClass;
     $user->id = $lastId;
     $user->username = $username;
-    $user->password = password_hash($password, $algo);
+    $user->password = password_hash($password, $this->algo);
     $user->avatar = '';
     $user->email = $email;
     $user->regDate = time();
@@ -219,8 +219,8 @@ class Auth {
       return \Result::Error('エラー：ユーザー名又はパスワードが一致していません。');
     }
 
-    if (password_needs_rehash($userData->password, $algo)) {
-      $userData->password = password_hash($password, $algo);
+    if (password_needs_rehash($userData->password, $this->algo)) {
+      $userData->password = password_hash($password, $this->algo);
       $path = $this->dataDir.$this->id.'.'.$userData->username.'.json';
       $json = json_encode($userData, JSON_PRETTY_PRINT | JSON_UNESCAPED_UNICODE | JSON_UNESCAPED_SLASHES);
 
diff --git a/util.php b/util.php
index d371950..65d38a3 100644
--- a/util.php
+++ b/util.php
@@ -33,7 +33,9 @@ function uuid(): string {
 
 function kys(mixed $arg): void {
   if (gettype($arg) == 'boolean') $arg = $arg === true ? 'true' : 'false';
-  foreach ($arg as $a) { if (gettype($a) == 'boolean') $a = $a === true ? 'true' : 'false'; }
+  if (gettype($arg) == 'array' || gettype($arg) == 'object') {
+    foreach ($arg as $a) { if (gettype($a) == 'boolean') $a = $a === true ? 'true' : 'false'; }
+  }
   echo '<style>html { color: #fcfcfc; background-color: #232023; } body { margin: 0; }</style>';
   echo '<header style="padding: 10px 0; display: flex; justify-content: space-evenly; background-color: #550f75; margin-bottom: 20px; position: sticky; top: 0;"><div><b>K</b>ILL</div> <div><b>Y</b>OUR</div> <div><b>S</b>ELF</div></header>';
   echo '<pre>';