[horde] PHP ERROR: feof() expects parameter 1 to be resource, object given [on line 385/386 of "/usr/share/php/Horde/Image/Base.php"]

[Thomas Trepper]

Hi all, 

I am running Horde 5.2.19 (test.php reports 5.2.14) installed via PEAR, PHP 5.6.30-0+deb8u1 on a Debian Jessy. When I log in and use the addressbook I sometimes(!) see the following errormessage in the horde-log. 

PHP ERROR: feof() expects parameter 1 to be resource, object given [pid 21891 on line 385 of "/usr/share/php/Horde/Image/Base.php“]

If the error is occuring it happens in a loop (I think until the session ends) - the logfile is easily 80MB full of only these lines. 

My feeling is this happens (more?) when I click on an entry to edit (which has an image attached).

Has anyone seen something like this?

Thanks a lot in advance and all the best,

Thomas