[O] bug#14379: Several Org source files cannot be loaded in isolation

[Glenn Morris]

Package: org-mode

(This report refers to the version of Org in the Emacs trunk.)
Several Org files cannot be loaded in isolation, by which I mean that eg

emacs -batch -l ob-C

fails. This may have no practical consequences, but seems like bad form
(eg it causes problems for automated testing).

The list is:

ob-C.el
ob-asymptote.el
ob-awk.el
ob-clojure.el
ob-fortran.el
ob-haskell.el
ob-io.el
ob-java.el
ob-latex.el
ob-lisp.el
ob-maxima.el
ob-ocaml.el
ob-perl.el
ob-picolisp.el
ob-python.el
ob-ruby.el
ob-scala.el
org-ctags.el

For all but the last, the problem is:

  Symbol's value as variable is void: org-babel-tangle-lang-exts

For org-ctags, the problem is:

  Symbol's function definition is void: case

(because the `case' macro from cl is used in the default value of a
defcustom, which is not evaluated till load time.). This one is probably
a real bug.