[HttpKernel] Fix BackedEnumValueResolver already resolved enum value

Author: janatjak

Controller/ArgumentResolver/BackedEnumValueResolver.php

@@ -51,6 +51,12 @@ public function resolve(Request $request, ArgumentMetadata $argument): iterable
             return;
         }
 
+        if ($value instanceof \BackedEnum) {
+            yield $value;
+
+            return;
+        }
+
         if (!\is_int($value) && !\is_string($value)) {
             throw new \LogicException(sprintf('Could not resolve the "%s $%s" controller argument: expecting an int or string, got %s.', $argument->getType(), $argument->getName(), get_debug_type($value)));
         }

Tests/Controller/ArgumentResolver/BackedEnumValueResolverTest.php

@@ -95,6 +95,12 @@ public function provideTestResolveData(): iterable
             ),
             [null],
         ];
+
+        yield 'already resolved attribute value' => [
+            self::createRequest(['suit' => Suit::Hearts]),
+            self::createArgumentMetadata('suit', Suit::class),
+            [Suit::Hearts],
+        ];
     }
 
     public function testResolveThrowsNotFoundOnInvalidValue()