* image-mode.el (image-next-file, image-previous-file): New commands.

[gnu-emacs] / etc / DEBUG

diff --git a/etc/DEBUG b/etc/DEBUG
index c8fd48c6bfaf8ce22f2e2501ad1c353e0f7cf5df..6cd0abeeaa5549a516abfe9626e6517577c61e6b 100644 (file)
--- a/etc/DEBUG
+++ b/etc/DEBUG
@@ -1,6 +1,6 @@
 Debugging GNU Emacs
 
-Copyright (C) 1985, 2000-2011  Free Software Foundation, Inc.
+Copyright (C) 1985, 2000-2013 Free Software Foundation, Inc.
 See the end of the file for license conditions.
 
 
@@ -405,6 +405,11 @@ stepping, you will see where the loop starts and ends.  Also, examine
 the data being used in the loop and try to determine why the loop does
 not exit when it should.
 
+You can also trying sending Emacs SIGUSR2, which, if `debug-on-event'
+has its default value, will cause Emacs to attempt to break it out of
+its current loop and into the Lisp debugger.  This feature is useful
+when a C-level debugger is not conveniently available.
+
 ** If certain operations in Emacs are slower than they used to be, here
 is some advice for how to find out why.