Http Client: Invalid header value detected (after update to 1.12.12)

[digitalcrab]

Hello guys
I noticed that we have thousands of error after updating to new version 1.12.12.

Here is my stack trace:

'Exception Zend_Http_Exception in /vendor/zendframework/zendframework1/library/Zend/Http/Client.php:1597
Message: Invalid header value detected
Trace: #0 /vendor/zendframework/zendframework1/library/Zend/Http/Client.php(467): Zend_Http_Client->_validateHeaderValue(39163)
#1 /vendor/zendframework/zendframework1/library/Zend/Http/Client.php(1358): Zend_Http_Client->setHeaders(''Content-Length'', 39163)
#2 /vendor/zendframework/zendframework1/library/Zend/Http/Client.php(1061): Zend_Http_Client->_prepareBody()

_prepareBody function sets Content-Length header like Integer. But then Validation function reject it because it is waiting for string or object with __toString function.

Please fix asap!

[froschdesign]

Already done: #567
Release is coming.