Hello,

I think the behaviour of ":dir" is broken since commit 8b5941330
(ob-core: Make :mkdirp work for :dir too). It only works now if
":mkdirp" is defined.

If I execute the following:

  #+begin_src elisp :dir /tmp/some-test-dir
  default-directory
  #+end_src

Instead of the expected "/tmp/some-test-dir" returned value, I get my
current directory.

Only add ":mkdirp t":

  #+begin_src elisp :dir /tmp/some-test-dir :mkdirp t
  default-directory
  #+end_src

do I get the expected result.

Please find attached my proposal for fixing the issue.

Regards,

Joaquín Aguirrezabalaga