Fixes display of prefix argument when input-method-function

* keyboard.c (read_char): When there is an input method function,
do not restore the echo area if a prefix argument is being
introduced.  (Bug#19875)

1 files changed, 8 insertions, 1 deletions

diff --git a/src/keyboard.c b/src/keyboard.c
index ac70062a79b..4f6a4414a04 100644
--- a/src/keyboard.c
+++ b/src/keyboard.c
@@ -3095,7 +3095,14 @@ read_char (int commandflag, Lisp_Object map,
 
       cancel_echoing ();
       ok_to_echo_at_next_pause = saved_ok_to_echo;
-      kset_echo_string (current_kboard, saved_echo_string);
+      /* Do not restore the echo area string when the user is
+         introducing a prefix argument. Otherwise we end with
+         repetitions of the partially introduced prefix
+         argument. (bug#19875) */
+      if (NILP (intern ("prefix-arg")))
+        {
+          kset_echo_string (current_kboard, saved_echo_string);
+        }
       current_kboard->echo_after_prompt = saved_echo_after_prompt;
       if (saved_immediate_echo)
         echo_now ();