bug#17467: 24.3; locate-library returning spurious path

[Stefan Monnier <monnier@iro.umontreal.ca>]

> The issue is that locate-library returns spurious paths like ".*/tramp" or
> ".*xxx/tramp.gz"

I don't see why these are necessarily spurious.  Please give very
concrete examples, so as to make it crystal clear why they're spurious.

> This is both unexpected and incorrect given this function name and
> spec.

Unexpected to you, obviously, but I'm not convinced it's unexpected in
general (after all, I don't remember other bug-reports in this area) and
definitely not incorrect.  See the docstring of `load':

   Execute a file of Lisp code named FILE.
   First try FILE with `.elc' appended, then try with `.el',
   then try FILE unmodified (the exact suffixes in the exact order are
   determined by `load-suffixes').  Environment variable references in
   [...]

Of course, there's an ambiguity about how the search is performed,
w.r.t. to whether it does:

   (dolist (s suffixes) (dolist (d load-path) ...)))
or
   (dolist (d load-path) (dolist (s suffixes) ...)))

We do the second, so that a compiled file in a later directory does not
override a non-compiled file in an earlier directory.


        Stefan