bug#21436: 25.0.50; dir local variables are ignored

[Sam Steingold]

My .dir-locals.el is

--8<---------------cut here---------------start------------->8---
((python-mode . ((python-shell-extra-pythonpaths . ("../utils" "")))))
--8<---------------cut here---------------end--------------->8---

nevertheless the value of `python-shell-extra-pythonpaths' in the python
buffer is `nil' even after an explicit M-: (hack-dir-local-variables)
RET or killing the buffer and re-visiting the file.

enable-local-variables ==> :safe
enable-dir-local-variables ==> t
dir-local-variables-alist ==> ((python-shell-extra-pythonpaths "../utils" ""))

The doc seems to support this behavior:

--8<---------------cut here---------------start------------->8---
hack-dir-local-variables is a compiled Lisp function in ‘files.el’.
Read per-directory local variables for the current buffer.
Store the directory-local variables in ‘dir-local-variables-alist’
and ‘file-local-variables-alist’, without applying them.
--8<---------------cut here---------------end--------------->8---

however, ISTR that `hack-dir-local-variables' did install the local
vars.

so, what do I need to do to get the dir-local vars to take effect?



In GNU Emacs 25.0.50.3 (x86_64-apple-darwin14.5.0, NS appkit-1348.17 Version 
10.10.5 (Build 14F27))
 of 2015-09-08
Repository revision: 48857075c96c00bdbf8536e25234d33ed1b6e3b9
Windowing system distributor 'Apple', version 10.3.1348
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-- 
Sam Steingold (http://sds.podval.org/) on darwin Ns 10.3.1348
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