Allow ints in source/dist reference

src/Composer/Package/Loader/ValidatingArrayLoader.php

@@ -323,8 +323,8 @@ class ValidatingArrayLoader implements LoaderInterface
                 if (!is_string($this->config[$srcType]['url'])) {
                     $this->errors[] = $srcType . '.url : should be a string, '.gettype($this->config[$srcType]['url']).' given';
                 }
-                if (isset($this->config[$srcType]['reference']) && !is_string($this->config[$srcType]['reference'])) {
-                    $this->errors[] = $srcType . '.reference : should be a string, '.gettype($this->config[$srcType]['reference']).' given';
+                if (isset($this->config[$srcType]['reference']) && !is_string($this->config[$srcType]['reference']) && !is_int($this->config[$srcType]['reference'])) {
+                    $this->errors[] = $srcType . '.reference : should be a string or int, '.gettype($this->config[$srcType]['reference']).' given';
                 }
                 if (isset($this->config[$srcType]['reference']) && preg_match('{^\s*-}', $this->config[$srcType]['reference'])) {
                     $this->errors[] = $srcType . '.reference : must not start with a "-", "'.$this->config[$srcType]['reference'].'" given';

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

@@ -194,6 +194,13 @@ class ValidatingArrayLoaderTest extends TestCase
                     'name' => 'npm-asset/angular--core',
                 ),
             ),
+            array( // refs as int or string
+                array(
+                    'name' => 'foo/bar',
+                    'source' => array('url' => 'https://example.org', 'reference' => 1234, 'type' => 'baz'),
+                    'dist' => array('url' => 'https://example.org', 'reference' => 'foobar', 'type' => 'baz'),
+                ),
+            ),
         );
     }