diff options
Diffstat (limited to 'lisp/emacs-lisp')
| -rw-r--r-- | lisp/emacs-lisp/debug.el | 9 |
1 files changed, 5 insertions, 4 deletions
diff --git a/lisp/emacs-lisp/debug.el b/lisp/emacs-lisp/debug.el index 28962595ace..2fa339e62fe 100644 --- a/lisp/emacs-lisp/debug.el +++ b/lisp/emacs-lisp/debug.el @@ -238,13 +238,14 @@ first will be printed into the backtrace buffer." (kill-buffer debugger-buffer))) ;; Restore the previous state of the debugger-buffer, in case we were ;; in a recursive invocation of the debugger. - (when (and debugger-previous-state - (buffer-live-p debugger-buffer)) + (when (buffer-live-p debugger-buffer) (with-current-buffer debugger-buffer (let ((inhibit-read-only t)) (erase-buffer) - (insert (nth 1 debugger-previous-state)) - (funcall (nth 0 debugger-previous-state))))) + (if (null debugger-previous-state) + (fundamental-mode) + (insert (nth 1 debugger-previous-state)) + (funcall (nth 0 debugger-previous-state)))))) (with-timeout-unsuspend debugger-with-timeout-suspend) (set-match-data debugger-outer-match-data))) ;; Put into effect the modified values of these variables |