Revert default change from #5603

src/Composer/Installer.php

@@ -625,7 +625,7 @@ class Installer
         // but as it is not persisted on disk we use a loader/dumper
         // to reload it in memory
         $localRepo = new InstalledArrayRepository(array());
-        $loader = new ArrayLoader();
+        $loader = new ArrayLoader(null, true);
         $dumper = new ArrayDumper();
         foreach ($tempLocalRepo->getCanonicalPackages() as $pkg) {
             $localRepo->addPackage($loader->load($dumper->dump($pkg)));

src/Composer/Package/Loader/ArrayLoader.php

@@ -29,7 +29,7 @@ class ArrayLoader implements LoaderInterface
     protected $versionParser;
     protected $loadOptions;
 
-    public function __construct(SemverVersionParser $parser = null, $loadOptions = true)
+    public function __construct(SemverVersionParser $parser = null, $loadOptions = false)
     {
         if (!$parser) {
             $parser = new VersionParser;

tests/Composer/Test/Package/Loader/ArrayLoaderTest.php

@@ -150,6 +150,7 @@ class ArrayLoaderTest extends \PHPUnit_Framework_TestCase
         $package = $this->loader->load($config);
         $dumper = new ArrayDumper;
         $expectedConfig = $config;
+        $expectedConfig = $this->fixConfigWhenLoadConfigIsFalse($config);
         $this->assertEquals($expectedConfig, $dumper->dump($package));
     }