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-rw-r--r--lisp/emacs-lisp/debug.el1
1 files changed, 1 insertions, 0 deletions
diff --git a/lisp/emacs-lisp/debug.el b/lisp/emacs-lisp/debug.el
index 0e6e0ef9765..5fce9e44abc 100644
--- a/lisp/emacs-lisp/debug.el
+++ b/lisp/emacs-lisp/debug.el
@@ -138,6 +138,7 @@ first will be printed into the backtrace buffer."
(save-excursion
(save-window-excursion
(pop-to-buffer debugger-buffer)
+ (setq buffer-read-only nil)
(erase-buffer)
(set-buffer-multibyte nil)
(let ((standard-output (current-buffer))