Make read-char-by-name signal an error for invalid input.

* international/mule-cmds.el (read-char-by-name): Signal an error
if the user does not supply a valid character.

* editfns.c (Finsert_char): Since read-char-by-name now signals an
error for invalid chars, don't check for a nil return value.

Fixes: debbugs:13177

1 files changed, 3 insertions, 0 deletions

diff --git a/lisp/ChangeLog b/lisp/ChangeLog
index cd7dd97315b..a25836da996 100644
--- a/lisp/ChangeLog
+++ b/lisp/ChangeLog
@@ -5,6 +5,9 @@
 
 2012-12-21  Chong Yidong  <cyd@gnu.org>
 
+        * international/mule-cmds.el (read-char-by-name): Signal an error
+        if the user does not supply a valid character (Bug#13177).
+
         * simple.el (transpose-subr-1): Preserve marker positions by
         changing the insertion sequence (Bug#13122).