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I'm running apt-cache rdepends to determine which packages are essential on my machine.
For alex, I got the following:
$ apt-cache rdepends alex --installed
alex
Reverse Depends:
alex:i386
The problem is that alex:i386 is actually not installed. Why would it show up? What am I doing or understanding wrong?
This is a bug in apt-cache.
apt-cache rdepends alex shows
alex
Reverse Depends:
haskell-platform
alex:i386
haskell-platform
alex:i386
alex:i386 isn’t part of the reverse-dependency chain (there is no chain here, since --recurse wasn’t used); it’s shown because it’s another solution for the dependency.
Adding --installed filters out the haskell-platform lines, but not the alex:i386 lines...
The next release of apt from the master branch will include a fix for this.
