I just ran across the same error with kdevelop-3.2.1-r1. locate
kdevapplicationtree comes up blank, so it's not anywhere on my system.
It may belong to a package that I don't have installed, but this is
still mysterious. Also, if you use find on the work directory there
isn't any mention of a similarly named file either. The conclusion is
that it doesn't exist and never did anywhere. I'll try other versions
and see if somehow it's just a missing sourcefile in the tarball.