[ClassLoader] Fix parsing namespace when token_get_all() is missing

Author: nicolas-grekas

src/Symfony/Component/ClassLoader/ClassCollectionLoader.php

@@ -137,8 +137,8 @@ public static function load($classes, $cacheDir, $name, $autoReload, $adaptive =
     public static function fixNamespaceDeclarations($source)
     {
         if (!function_exists('token_get_all') || !self::$useTokenizer) {
-            if (preg_match('/namespace(.*?)\s*;/', $source)) {
-                $source = preg_replace('/namespace(.*?)\s*;/', "namespace$1\n{", $source)."}\n";
+            if (preg_match('/(^|\s)namespace(.*?)\s*;/', $source)) {
+                $source = preg_replace('/(^|\s)namespace(.*?)\s*;/', "$1namespace$2\n{", $source)."}\n";
             }
 
             return $source;

src/Symfony/Component/ClassLoader/Tests/ClassCollectionLoaderTest.php

@@ -205,7 +205,7 @@ public function getFixNamespaceDeclarationsDataWithoutTokenizer()
             array("namespace   Bar ;\nclass Foo {}\n", "namespace   Bar\n{\nclass Foo {}\n}\n"),
             array("namespace Foo\Bar;\nclass Foo {}\n", "namespace Foo\Bar\n{\nclass Foo {}\n}\n"),
             array("namespace Foo\Bar\Bar\n{\nclass Foo {}\n}\n", "namespace Foo\Bar\Bar\n{\nclass Foo {}\n}\n"),
-            array("namespace\n{\nclass Foo {}\n}\n", "namespace\n{\nclass Foo {}\n}\n"),
+            array("\nnamespace\n{\nclass Foo {}\n\$namespace=123;}\n", "\nnamespace\n{\nclass Foo {}\n\$namespace=123;}\n"),
         );
     }