Perhaps this would work instead- look at the dependencies array for Cinelerra, and use "pacman -Rsc <insert dependencies here>". This should perform the same function.

In the same respect, a package from the synced repos that was already removed could have its dependencies checked by "pacman -Si <package>", and the above step could be taken.

Is this satisfactory? Because there is no other way to do this in pacman because the DB does not store old package entries, and thus could not look up old dependencies.

You are right, Dan.
IMO it doesn't worth to implement this, and it's hard, especially for packages build for AUR.

"Because there is no other way to do this in pacman because the DB does not store old package entries, and thus could not look up old dependencies."

Well, it could look up the new dependencies instead... For aur it could do the same, just as "aurbuild" looks up dependencies of the packages.

But I think you're right. It isn't as important, and as I didn't know the -i option (pacman -Si) this should be fine for me...

Dan, now that we have -Se (install only dependencies) - this FR doesn't seem too hard.

Some notes:
1. This won't work with aur, since we have no repo there, so in this case user can do pacman -Rus $depends, where depends list can be figured out with the help of aur webpage.
2. Using -Rsc combination can be dangerous, I suggest -Rs only.

3. Using orphan listing can also help here (note: maybe it must be more than one, because if orphan1 depends on orphan2, then orphan2 becomes orphan (so will be detected) after removal of orphan1)

I really don't get this report.
If you were able to remove the package with just -R, then you don't need the -c flag at all.
Now, if you forgot the -s part, then no problem, that's exactly what orphans are for !

You just list the orphans whith -Qtd, then you remove them with -Rs (so that takes care of the recursive orphans, as Nagy was saying).

Can we close this? As Xavier said, there is no need to -c unless you use -Rd to get rid of the package, in which case you should clean up your own mess. And "pacman -Qqtd" get alls the deps left of the system.