php7-gd edge/testing Unable to load dynamic library '/usr/lib/php7/gd.so'
PHP Warning: PHP Startup: Unable to load dynamic library ‘/usr/lib/php7/gd.so’ - Error relocating /usr/lib/libpng16.so.16: inflateValidate: symbol not found in Unknown on line 0
(from redmine: issue id 7111, created on 2017-04-12, closed on 2017-04-14)