imagick/gmagick both enabled crashes phpinfo

I've finally started putting together a replacement for my Nginx/PHP5.4 production machines using current builds, so I've got Nginx 1.13.3 and PHP 7.1.8 running and have the necessary set of extensions, but when I enable both imagick and gmagick then phpinfo crashes. Both seem to be working fine otherwise, and I can probably drop one or other these days but is anybody else seeing this problem? -- Lester Caine - G8HFL ----------------------------- Contact - http://lsces.co.uk/wiki/?page=contact L.S.Caine Electronic Services - http://lsces.co.uk EnquirySolve - http://enquirysolve.com/ Model Engineers Digital Workshop - http://medw.co.uk Rainbow Digital Media - http://rainbowdigitalmedia.co.uk