[Emacs-diffs] master 3fc36f4: Avoid args-out-of-range errors on fringe clicks after "C-h k"

[Eli Zaretskii]

branch: master
commit 3fc36f427a6dfe5366fd1391fee1d037a1bd6cd7
Author: Eli Zaretskii <address@hidden>
Commit: Eli Zaretskii <address@hidden>

    Avoid args-out-of-range errors on fringe clicks after "C-h k"
    
    * src/keyboard.c (echo_truncate): Don't call Ftruncate if the echo
    message is already shorter than NCHARS.  (Bug#27040)
---
 src/keyboard.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/src/keyboard.c b/src/keyboard.c
index c9fa2a9..55486c6 100644
--- a/src/keyboard.c
+++ b/src/keyboard.c
@@ -634,7 +634,8 @@ echo_length (void)
 static void
 echo_truncate (ptrdiff_t nchars)
 {
-  if (STRINGP (KVAR (current_kboard, echo_string)))
+  Lisp_Object es = KVAR (current_kboard, echo_string);
+  if (STRINGP (es) && SCHARS (es) > nchars)
     kset_echo_string (current_kboard,
                      Fsubstring (KVAR (current_kboard, echo_string),
                                  make_number (0), make_number (nchars)));