bug#12938: 24.2; Lexical binding leaks into package-install somehow

[Stefan Monnier]

> Can you test the patch below to confirm it fixes the problem for you?

Forget it, that patch was at the wrong place (kill-all-local-variables)
gets called soon after that, defeating this approach.  I've installed
the patch below instead, which seems to fix the problem.


        Stefan


=== modified file 'lisp/emacs-lisp/bytecomp.el'
--- lisp/emacs-lisp/bytecomp.el 2012-11-20 19:05:20 +0000
+++ lisp/emacs-lisp/bytecomp.el 2012-11-23 21:44:46 +0000
@@ -1748,6 +1748,9 @@
         ;; There may be a file local variable setting (bug#10419).
         (setq buffer-read-only nil
               filename buffer-file-name))
+      ;; Don't inherit lexical-binding from caller (bug#12938).
+      (unless (local-variable-p 'lexical-binding)
+        (setq-local lexical-binding nil))
       ;; Set the default directory, in case an eval-when-compile uses it.
       (setq default-directory (file-name-directory filename)))
     ;; Check if the file's local variables explicitly specify not to