1 files changed, 9 insertions, 6 deletions

diff --git a/src/coding.c b/src/coding.c
index be18ab80c3b..375839fb2bc 100644
--- a/src/coding.c
+++ b/src/coding.c
@@ -897,7 +897,6 @@ coding_set_source (coding)
       else
         {
           struct buffer *buf = XBUFFER (coding->src_object);
-          EMACS_INT beg_byte = BUF_BEG_BYTE (buf);
           EMACS_INT gpt_byte = BUF_GPT_BYTE (buf);
           unsigned char *beg_addr = BUF_BEG_ADDR (buf);
 
@@ -4342,7 +4341,6 @@ encode_coding_charset (coding)
   unsigned char *dst_end = coding->destination + coding->dst_bytes;
   int safe_room = MAX_MULTIBYTE_LENGTH;
   int produced_chars = 0;
-  struct charset *charset;
   Lisp_Object attrs, eol_type, charset_list;
   int ascii_compatible;
   int c;
@@ -7319,10 +7317,16 @@ DEFUN ("define-coding-system-internal", Fdefine_coding_system_internal,
       for (tail = charset_list; CONSP (tail); tail = XCDR (tail))
         {
           struct charset *charset = CHARSET_FROM_ID (XINT (XCAR (tail)));
+          int idx = (CHARSET_DIMENSION (charset) - 1) * 4;
 
-          for (i = charset->code_space[0]; i <= charset->code_space[1]; i++)
-            if (NILP (AREF (val, i)))
-              ASET (val, i, XCAR (tail));
+          for (i = charset->code_space[idx];
+               i <= charset->code_space[idx + 1]; i++)
+            {
+              if (NILP (AREF (val, i)))
+                ASET (val, i, XCAR (tail));
+              else
+                error ("Charsets conflicts in the first byte");
+            }
         }
       ASET (attrs, coding_attr_charset_valids, val);
       category = coding_category_charset;
@@ -7402,7 +7406,6 @@ DEFUN ("define-coding-system-internal", Fdefine_coding_system_internal,
   else if (EQ (coding_type, Qiso_2022))
     {
       Lisp_Object initial, reg_usage, request, flags;
-      struct charset *charset;
       int i, id;
 
       if (nargs < coding_arg_iso2022_max)