rm: when error during recursive, stops prematurely

[niyaznigmatullin]

uutils doesn't remove b/d in the following example

$ mkdir -p b/a/p
$ mkdir b/c b/d
$ chmod -w b/a
$ rm -rf b
rm: cannot remove 'b': Permission denied
$ ls b
a d

but GNU removes b/d

That's probably because of fs::remove_dir_all behavior