Merge branch 'hotfix/180'

Close #180
Fixes #170
Fixes #176

Author: weierophinney

CHANGELOG.md

@@ -18,7 +18,10 @@ All notable changes to this project will be documented in this file, in reverse
 
 ### Fixed
 
-- Nothing.
+- [#180](https://github.com/zendframework/zend-validator/pull/180) fixes how
+  `Zend\Validator\File\MimeType` "closes" the open FileInfo handle for the file
+  being validated, using `unset()` instead of `finfo_close()`; this resolves a
+  segfault that occurs on older PHP versions.
 
 ## 2.9.1 - 2017-05-17
 

src/File/MimeType.php

@@ -385,7 +385,7 @@ public function isValid($value, $file = null)
             $this->type = null;
             if (! empty($this->finfo)) {
                 $this->type = finfo_file($this->finfo, $file);
-                finfo_close($this->finfo);
+                unset($this->finfo);
             }
         }