delegate failed `'curl' -s -L -o '%u.dat' 'https:%M'' @ error/delegate.c/InvokeDelegate/1926

ImageMagick version

7.1.2-30

Operating system

Linux

Operating system, version and so on

Archlinux

Description

This looks extremely similar to #230. However, when running the printed curl command manually, it works fine, and also exits with code 0.

$ magick -verbose https://www.imagemagick.org/image/wizard.png wizard.png
'curl' -s -L -o '/tmp/magick-1FaQv0pkuVKLHB0pcQZo-9vXzbWUZvqU.dat' 'https://www.imagemagick.org/image/wizard.png'
magick: delegate failed `'curl' -s -L -o '%u.dat' 'https:%M'' @ error/delegate.c/InvokeDelegate/1926.

It does actually download the image just fine in the /tmp folder.

I've tried adding -v in delegates.xml which makes it print a lot of info, but considering it downloads just fine and curl exits with 0, I'm not sure it's relevant. Can provide the output if it can't be reproduced though.

Steps to Reproduce

magick -verbose https://www.imagemagick.org/image/wizard.png wizard.png

Images

This is specifically in the https delegate. I've tried various hosts (imagemagick, derpicdn, my own VPS -- the latter as far as I know does not do any caching whatsoever) all with the same result.