Inconsistent results from "%p"

[Greg Toombs]

When I run this:

convert joint/* \
    -limit memory 512MiB \
 -type Grayscale \
    -crop 2x1@ +adjoin \
    -set filename:fn '%t-%[fx:1+(p&1)].%e' \
    +repage \
    'separate/%[filename:fn]'

Sometimes the "p" in the fx call doesn't update properly, leading to files getting inconsistently overwritten, like this (output from 'verbose'):

joint/0_stereoscopic_views_-_kilburn_-_royal_botanic_gardens.jpg=>separate/0_stereoscopic_views_-_kilburn_-_royal_botanic_gardens-2.jpg[0] JPEG 640x324=>320x324 8-bit Grayscale DirectClass 20.5KB 42.370u 0:29.949
joint/0_stereoscopic_views_-_kilburn_-_royal_botanic_gardens.jpg=>separate/0_stereoscopic_views_-_kilburn_-_royal_botanic_gardens-1.jpg[1] JPEG 640x324=>320x324 8-bit Grayscale DirectClass 20.5KB 42.360u 0:29.969
joint/1080par.jpg=>separate/1080par-1.jpg[2] JPEG 1238x720=>619x720 8-bit Grayscale DirectClass 81.9KB 42.170u 0:29.829
joint/1080par.jpg=>separate/1080par-1.jpg[3] JPEG 1238x720=>619x720 8-bit Grayscale DirectClass 81.9KB 42.170u 0:29.830
joint/1240637960_ec87a611d8_b.jpg=>separate/1240637960_ec87a611d8_b-1.jpg[4] JPEG 1024x641=>512x641 8-bit Grayscale DirectClass 86KB 41.970u 0:29.729
joint/1240637960_ec87a611d8_b.jpg=>separate/1240637960_ec87a611d8_b-1.jpg[5] JPEG 1024x641=>512x641 8-bit Grayscale DirectClass 86KB 41.970u 0:29.730

[Greg Toombs (greg-toombs)]

Package: imagemagick
Priority: optional
Section: graphics
Installed-Size: 447
Maintainer: Ubuntu Developers <email address hidden>
Original-Maintainer: ImageMagick Packaging Team <email address hidden>
Architecture: amd64
Version: 8:6.7.7.10-2ubuntu4

[broucaries (roucaries-bastien+bugs)]

I could you retry with more recent version like debian experimental ?

[broucaries (roucaries-bastien+bugs)]

FWD http://www.imagemagick.org/discourse-server/viewtopic.php?f=3&t=22387

[Greg Toombs (greg-toombs)]

So from my interpretation, v6 is "will not fix" and v7 is "fix committed"?