bug symfony#27727 [Routing] Disallow object usage inside Route (paxal)

This PR was submitted for the master branch but it was merged into the 4.1 branch instead (closes symfony#27727).

Discussion
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[Routing] Disallow object usage inside Route

| Q             | A
| ------------- | ---
| Branch?       | master
| Bug fix?      | no
| New feature?  | no
| BC breaks?    | no
| Deprecations? | no
| Tests pass?   | ?
| Fixed tickets | symfony#27723
| License       | MIT
| Doc PR        | ✘

As discussed in symfony#27723 the `Route` object should not support nested objects as attributes (`requirements`, `defaults`, ...).

Thus, if detected, an `\InvalidArgumentException` will be thrown.

Will fix symfony#27723

Commits
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426fb45 [Routing] Disallow object usage inside Route

Author: nicolas-grekas

src/Symfony/Component/Routing/Matcher/Dumper/PhpMatcherDumper.php

@@ -746,6 +746,10 @@ public static function export($value): string
             return 'null';
         }
         if (!\is_array($value)) {
+            if (\is_object($value)) {
+                throw new \InvalidArgumentException('Symfony\Component\Routing\Route cannot contain objects.');
+            }
+
             return str_replace("\n", '\'."\n".\'', var_export($value, true));
         }
         if (!$value) {

src/Symfony/Component/Routing/Tests/Matcher/Dumper/PhpMatcherDumperTest.php

@@ -491,6 +491,18 @@ private function generateDumpedMatcher(RouteCollection $collection, $redirectabl
 
         return $this->matcherClass;
     }
+
+    /**
+     * @expectedException \InvalidArgumentException
+     * @expectedExceptionMessage Symfony\Component\Routing\Route cannot contain objects
+     */
+    public function testGenerateDumperMatcherWithObject()
+    {
+        $routeCollection = new RouteCollection();
+        $routeCollection->add('_', new Route('/', array(new \stdClass())));
+        $dumper = new PhpMatcherDumper($routeCollection);
+        $dumper->dump();
+    }
 }
 
 abstract class RedirectableUrlMatcherStub extends UrlMatcher implements RedirectableUrlMatcherInterface