AbstractUser::$roles est une Collection, pas un array.

src/UnicaenAuth/Entity/Db/AbstractUser.php

@@ -4,6 +4,7 @@ namespace UnicaenAuth\Entity\Db;
 
 use BjyAuthorize\Provider\Role\ProviderInterface;
 use Doctrine\Common\Collections\ArrayCollection;
+use Doctrine\Common\Collections\Collection;
 use Doctrine\ORM\Mapping as ORM;
 use ZfcUser\Entity\UserInterface;
 
@@ -53,7 +54,7 @@ abstract class AbstractUser implements UserInterface, ProviderInterface
     protected $state;
 
     /**
-     * @var \Doctrine\Common\Collections\Collection
+     * @var Collection
      * @ORM\ManyToMany(targetEntity="UnicaenAuth\Entity\Db\Role")
      * @ORM\JoinTable(name="user_role_linker",
      *      joinColumns={@ORM\JoinColumn(name="user_id", referencedColumnName="id")},
@@ -205,11 +206,11 @@ abstract class AbstractUser implements UserInterface, ProviderInterface
     /**
      * Get role.
      *
-     * @return array
+     * @return Collection
      */
     public function getRoles()
     {
-        return $this->roles->getValues();
+        return $this->roles;
     }
 
     /**
@@ -219,9 +220,9 @@ abstract class AbstractUser implements UserInterface, ProviderInterface
      *
      * @return void
      */
-    public function addRole($role)
+    public function addRole(Role $role)
     {
-        $this->roles[] = $role;
+        $this->roles->add($role);
     }
     
     /**