(print_string): If we are going to print a unibyte

string into a multibyte buffer, convert the string to multibyte by
str_to_multibyte.

1 files changed, 17 insertions, 2 deletions

diff --git a/src/print.c b/src/print.c
index aca3116eb58..e9dd4ede83f 100644
--- a/src/print.c
+++ b/src/print.c
@@ -465,8 +465,23 @@ print_string (string, printcharfun)
       else if (EQ (printcharfun, Qt)
                ? ! NILP (buffer_defaults.enable_multibyte_characters)
                : ! NILP (current_buffer->enable_multibyte_characters))
-        chars = multibyte_chars_in_text (XSTRING (string)->data,
-                                         STRING_BYTES (XSTRING (string)));
+        {
+          /* If unibyte string STRING contains 8-bit codes, we must
+             convert STRING to a multibyte string containing the same
+             character codes.  */
+          Lisp_Object newstr;
+          int bytes;
+
+          chars = STRING_BYTES (XSTRING (string));
+          bytes = parse_str_to_multibyte (XSTRING (string)->data, chars);
+          if (chars < bytes)
+            {
+              newstr = make_uninit_multibyte_string (chars, bytes);
+              bcopy (XSTRING (string)->data, XSTRING (newstr)->data, chars);
+              str_to_multibyte (XSTRING (newstr)->data, bytes, chars);
+              string = newstr;
+            }
+        }
       else
         chars = STRING_BYTES (XSTRING (string));