magick -gamma -1,-1,0 does not produce all-yellow image

[pgajdos]

magick ../test.png  -gamma -1,-1,0  -alpha off  yellow_gamma.png

taken from https://usage.imagemagick.org/canvas/ does not produce all-yellow image, but rather all-white one.

Or

magick ../test.png -channel red -gamma -1 -channel green -gamma -1 -channel blue -gamma 0 -alpha off yellow_gamma.png

produces

Similar to ImageMagick/ImageMagick#1151.

Tested with 7.1.1-43.

[pgajdos]

magick convert ../test.png -channel red -gamma -1 -channel green -gamma -1 -channel blue -gamma 0 -alpha off yellow_gamma.png

(the longer version + magick convert instead of magick) produces expected result, i. e. all-yellow image.