Issue #3312108: RuntimeException: Failed to start the session because headers...

Issue #3312108: RuntimeException: Failed to start the session because headers have already been sent

src/AuthenticationService.php

@@ -173,7 +173,8 @@ class AuthenticationService implements AuthenticationServiceInterface {
 
       $url = Url::fromRoute('user.login');
       $response = new TrustedRedirectResponse($url->toString());
-      return $response->send();
+      $response->send();
+      exit();
     }
 
     if ($this->debug) {
@@ -196,7 +197,8 @@ class AuthenticationService implements AuthenticationServiceInterface {
     $authUrl = $this->oauthClient->getAuthorizationUrl() . '&client_id=' . $clientId;
 
     $response = new TrustedRedirectResponse($authUrl);
-    return $response->send();
+    $response->send();
+    exit();
   }
 
   /**
@@ -220,7 +222,8 @@ class AuthenticationService implements AuthenticationServiceInterface {
         $redirect .= '&expires_on=' . $accessToken->getExpires();
 
         $response = new TrustedRedirectResponse($redirect);
-        return $response->send();
+        $response->send();
+        exit();
       }
     }
     catch (IdentityProviderException $e) {