I'm trying to understand what's the use case you want to enable.
I'll describe several scenarios:
1.
Suppose you have the following directories:
$ ls -d /tmp/find-*
/tmp/find-bar /tmp/find-foo
If I make find /tmp -path /tmp/fi<TAB> complete with directories, it
will complete to:
$ find /tmp -path /tmp/fi<TAB>
$ find /tmp -path /tmp/find-<CURSOR>
If you hit Enter after that, nothing will be found.
2.
Now suppose you only had one directory:
$ ls -d /tmp/find-*
/tmp/find-bar
Then the completion would look like:
$ find /tmp -path /tmp/fi<TAB>
$ find /tmp -path /tmp/find-bar/<CURSOR>
Again, nothing will be found, because of the trailing slash
3.
Take 2 as exemple, and remove the trailing slash
$ find /tmp -path /tmp/find-bar<ENTER>
This works, but it's no different than:
$ find /tmp/find-bar
which already works.
4.
Take 1 as example, but now, after completion, you add wildcard and quotes:
$ find /tmp -path /tmp/fi<TAB>
$ find /tmp -path /tmp/find-<CURSOR>
$ find /tmp -path "/tmp/find-*"<ENTER>
Then it works, but it doesn't look like a good use case for completion.
What are you trying to do?
Cheers,
Gabriel