bug#18306: 24.4.50; emacs 24.4.5 hangs in c-mode with '[' character

[Alan Mackenzie <acm@muc.de>]

Hi, Nick.

nick <nick@wordtronix.org> wrote:
> While in c-mode writing the line: char s[]; emacs hangs without update.
> Obviously not happening in this bugreport mode. :/ .

Yes, there was an infinite loop down in the fontification code.  I think
it's fixed now.  Would you please try it out and confirm that it is
indeed fixed.  Either download and build the latest trunk, or apply this
patch:

diff -r 2cd4e65a2f5a cc-fonts.el
--- a/cc-fonts.el	Sat Aug 02 18:12:32 2014 +0000
+++ b/cc-fonts.el	Sat Aug 23 10:36:15 2014 +0000
@@ -1088,14 +1088,11 @@
 	    ;; initializing brace lists.
 	    (let (found)
 	      (while
-	    	  (and (setq found
-	    		     (c-syntactic-re-search-forward
-	    		      "[;,]\\|\\s)\\|\\'\\|\\(=\\|\\s(\\)" limit t t))
-	    	       (eq (char-before) ?\[))
-	    	(backward-char)
-	    	(c-safe (c-forward-sexp 1))
-	    	(setq found nil)
-	    	(setq brackets-after-id t))
+		  (and (setq found (c-syntactic-re-search-forward
+			     "[;,]\\|\\s)\\|\\'\\|\\(=\\|\\s(\\)" limit t t))
+		       (eq (char-before) ?\[)
+		       (c-go-up-list-forward))
+		     (setq brackets-after-id t))
 	      found))
 
       (setq next-pos (match-beginning 0)


Thanks for taking to trouble to report this bug.

-- 
Alan Mackenzie (Nuremberg, Germany).