Description:
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Related to http://bugs.php.net/bug.php?id=48203

Curl crashes when CURLOPT_STDERR file pointer is closed before calling 
curl_exec(), i.e.

$fp = fopen(dirname(__FILE__) . '/bug48203.tmp', 'w');

$ch = curl_init();

curl_setopt($ch, CURLOPT_VERBOSE, 1);
curl_setopt($ch, CURLOPT_STDERR, $fp);
curl_setopt($ch, CURLOPT_URL, getenv("PHP_CURL_HTTP_REMOTE_SERVER"));

fclose($fp); // <-- premature close of $fp caused a crash!

curl_exec($ch); // segfault


Error is reproduced on latest svn php5.3, php5.4 and trunk
Fix is also attached here.



Test script:
---------------
Full test script is available here: http://svn.php.net/viewvc/php/php-src/trunk/ext/curl/tests/bug48203.phpt?view=markup

Expected result:
----------------
No segfault, see test script

Actual result:
--------------
Segfault