make-mode.el (makefile-fill-paragraph): Fix infloop.

Fixes: debbugs:13914

1 files changed, 2 insertions, 1 deletions

diff --git a/lisp/progmodes/make-mode.el b/lisp/progmodes/make-mode.el
index 3c0871e57b6..01d1e76457d 100644
--- a/lisp/progmodes/make-mode.el
+++ b/lisp/progmodes/make-mode.el
@@ -1300,7 +1300,8 @@ Fill comments, backslashed lines, and variable definitions specially."
                  (point))))
             (end
              (save-excursion
-               (while (= (preceding-char) ?\\)
+               (while (and (= (preceding-char) ?\\)
+                           (not (eobp)))
                  (end-of-line 2))
                (point))))
         (save-restriction