Fix bugs #12447 and #12326 with infloop causes by idle timers, update docs.

 src/keyboard.c (timer_check_2): Move calculation of 'timers' and
 'idle_timers' from here ...
 (timer_check): ... to here.  Use Fcopy_sequence to copy the timer
 lists, to avoid infloops when the timer does something stupid,
 like reinvoke itself with the same or smaller time-out.

 lisp/emacs-lisp/timer.el (run-with-idle-timer)
 (timer-activate-when-idle): Warn against reinvoking an idle timer
 from within its own timer action.

 doc/lispref/os.texi (Idle Timers): Warn against reinvoking an idle timer
 from within its own timer action.

1 files changed, 9 insertions, 0 deletions

diff --git a/src/ChangeLog b/src/ChangeLog
index 6ea40b3f122..b69d4bb7113 100644
--- a/src/ChangeLog
+++ b/src/ChangeLog
@@ -1,3 +1,12 @@
+2012-09-22  Eli Zaretskii  <eliz@gnu.org>
+
+        * keyboard.c (timer_check_2): Move calculation of 'timers' and
+        'idle_timers' from here ...
+        (timer_check): ... to here.  Use Fcopy_sequence to copy the timer
+        lists, to avoid infloops when the timer does something stupid,
+        like reinvoke itself with the same or smaller time-out.
+        (Bug#12447)
+
 2012-09-22  Martin Rudalics  <rudalics@gmx.at>
 
         * window.c (Fsplit_window_internal): Handle only Qt value of