It would be easier not having to register on a custom website just to
issue reports. But anyway this line triggers a runtime exception:
Line 256, dmagick/Image.d:
result ~= std.string.format("%sx%s%+ld%+ld ",
imageRef.page.width, imageRef.page.height,
imageRef.page.x, imageRef.page.y);
std.format.FormatException@std\format.d(4094): formatArg
Personally, it's because of issues like this I never use any other
specifier but %s. It's hard to track this down with no line numbers,
and that exception message that points to internal code is completely
useless. Ah, phobos...