(reset_var_on_error): New fun.

(signal_before_change, signal_after_change):
Use it to reset (after|before)-change-functions to nil in case of error.
Bind inhibit-modification-hooks to t.
Don't bind (after|before)-change-functions to nil while they run.

1 files changed, 5 insertions, 0 deletions

diff --git a/etc/NEWS b/etc/NEWS
index c652703bcf1..32b555f14c9 100644
--- a/etc/NEWS
+++ b/etc/NEWS
@@ -79,6 +79,11 @@ in to make it use the scrollbars from the system theme.
 
 * Lisp Changes in Emacs 22.2.
 
++++
+** inhibit-modification-hooks is bound to t while running modification hooks.
+As a happy consequence, after-change-functions and before-change-functions
+are not bound to nil any more while running an (after|before)-change-function.
+
 ** New function `window-full-width-p' returns t if a window is as wide
 as its frame.