[DependencyInjection] Fix lazyness of AutowiringFailedException

Author: nicolas-grekas

src/Symfony/Component/DependencyInjection/Exception/AutowiringFailedException.php

@@ -39,7 +39,7 @@ public function __construct(string $serviceId, string|\Closure $message = '', in
         parent::__construct('', $code, $previous);
 
         $this->message = new class($this->message, $this->messageCallback) {
-            private string $message;
+            private string|self $message;
             private ?\Closure $messageCallback;
 
             public function __construct(&$message, &$messageCallback)

src/Symfony/Component/DependencyInjection/Tests/Exception/AutowiringFailedExceptionTest.php

@@ -25,4 +25,25 @@ public function testGetMessageCallbackWhenMessageIsNotANotClosure()
 
         self::assertNull($exception->getMessageCallback());
     }
+
+    public function testLazyness()
+    {
+        $counter = 0;
+        $exception = new AutowiringFailedException(
+            'App\DummyService',
+            function () use (&$counter) {
+                ++$counter;
+
+                throw new \Exception('boo');
+            }
+        );
+
+        $this->assertSame(0, $counter);
+
+        $this->assertSame('boo', $exception->getMessage());
+        $this->assertSame(1, $counter);
+
+        $this->assertSame('boo', $exception->getMessage());
+        $this->assertSame(1, $counter);
+    }
 }