possible bug in +opaque in IM 6.4.1-3

[fmw42]

Reference Anthony's notes: http://www.imagemagick.org/Usage/color/#replace

I tried:

convert logo: -fill black +opaque white tmp.png

to make everything that was not white to become black. I got the following error message:

convert logo: -fill black +opaque white tmp.png
convert: unable to open image `white': No such file or directory.

[magick]

We can reproduce the problem and have a patch in ImageMagick 6.4.1-4 Beta available sometime tomorrow.