bug#11837: 24.1.50; *Compile-Log* Error: Don't know how to compile nil

[Vladimir Lomov]

Hello,
** Stefan Monnier [2012-07-02 10:12:34 -0400]:

>> emacs -Q --debug-init --eval '(setq load-path (cons 
>> "/usr/share/emacs/site-lisp" load-path))' -l 
>> /usr/share/emacs/site-lisp/auctex.el ex.ltx

>> After start in window at bottom message is shown:

>> Error: Don't know how to compile nil

> Can you please try: emacs -Q --debug-init --eval '(setq load-path (cons 
> "/usr/share/emacs/site-lisp" load-path) debug-on-error t byte-compile-debug 
> t)' -l /usr/share/emacs/site-lisp/auctex.el ex.ltx

> and show us the resulting backtrace (assuming you get one)?

Yes, I got. I run above command, copied (`C-x r s r') to other buffer
(`C-x r i r') and saved as file `backtrace.txt'. I hope this is the
right way.

>         Stefan

---------------------------- 8< ----------------------------
Debugger entered--Lisp error: (error "Don't know how to compile nil")
  signal(error ("Don't know how to compile nil"))
  error("Don't know how to compile %S" nil)
  #[0 "\306     !\307\211\211\211\211\211\n\f
\3009\2037\310\300!\2058\300K\2028\300\211\242\311=\211\203D
A\262\3009\203`
\242\312>\204U\313\314\"\210\315!\262
@\316=
\242\317=\204l\313\314\"\210\320!\262
\242\321=\203\201
\211A@)\262\322!\262\211\203\217\311B\262\3009\203\232\300M\202\233
)\266\202.\f\207"
 [font-latex-warning byte-compile-initial-macro-environment 
byte-compile-verbose byte-optimize byte-compile-dynamic 
byte-compile-dynamic-docstrings copy-alist nil fboundp macro (closure lambda) 
error "Don't know how to compile %S" byte-compile--refiy-function closure 
lambda byte-compile-preprocess function byte-compile-lambda 
byte-compile-warnings byte-compile-free-assignments 
byte-compile-free-references byte-compile-const-variables 
byte-compile-bound-variables byte-compile-function-environment 
byte-compile--outbuffer byte-compile-macro-environment lexical-binding x] 13 
"\n\n(fn)"]()
  byte-compile(font-latex-warning)
  byte-code("\305\306\307\"\210\310=\203\307 \210\311\312K!\203=    
\313\211\203<@\211@\314\315\316\fP!!\210\314\315\316\f\317Q!!\210)
A\211\204*\320\321!\207" [major-mode font-latex-built-in-keyword-classes elt 
--dolist-tail-- name add-hook latex-mode-hook font-latex-setup latex-mode 
byte-code-function-p font-latex-make-built-in-keywords nil byte-compile intern 
"font-latex-" "-make" provide font-latex] 6)
  font-latex-setup()
  VirTeX-common-initialization()
  LaTeX-common-initialization()
  latex-mode()
  set-auto-mode-0(latex-mode nil)
  set-auto-mode()
  normal-mode(t)
  after-find-file(nil t)
  find-file-noselect-1(#<buffer ex.ltx> "~/tmp/ex.ltx" nil nil "~/tmp/ex.ltx" 
(12328882 2051))
  find-file-noselect("/home/vladimir/tmp/ex.ltx" nil nil nil)
  find-file("/home/vladimir/tmp/ex.ltx")
  command-line-1(("--eval" "(setq load-path (cons 
\"/usr/share/emacs/site-lisp\" load-path) debug-on-error t byte-compile-debug 
t)" "-l" "/usr/share/emacs/site-lisp/auctex.el" "ex.ltx"))
  command-line()
  normal-top-level()
---------------------------- 8< ----------------------------

-- 
No discipline is ever requisite to force attendance upon lectures which are
really worth the attending.
                -- Adam Smith, "The Wealth of Nations"

backtrace.txt
Description: Text document

ex.ltx
Description: Text Data