File bash-2.05b-display.patch of Package compat-readline4

--- lib/readline/display.c
+++ lib/readline/display.c	2002-08-30 19:24:43.000000000 +0900
@@ -70,7 +70,7 @@
 static void cr PARAMS((void));
 
 #if defined (HANDLE_MULTIBYTE)
-static int _rl_col_width PARAMS((char *, int, int));
+static int _rl_col_width PARAMS((const char *, int, int));
 static int *_rl_wrapped_line;
 #else
 #  define _rl_col_width(l, s, e)	(((e) <= (s)) ? 0 : (e) - (s))
@@ -1350,7 +1350,7 @@
 #if 0
 	      _rl_last_c_pos += _rl_col_width (nfd+lendiff, 0, temp-lendiff) - col_lendiff;
 #else
-	      _rl_last_c_pos += _rl_col_width (nfd+lendiff, 0, temp-col_lendiff);
+	      _rl_last_c_pos += _rl_col_width (nfd+lendiff, 0, temp-lendiff);
 #endif
 	    }
 	}
@@ -1510,8 +1510,15 @@
 #if defined (HANDLE_MULTIBYTE)
   /* If we have multibyte characters, NEW is indexed by the buffer point in
      a multibyte string, but _rl_last_c_pos is the display position.  In
-     this case, NEW's display position is not obvious. */
-  if ((MB_CUR_MAX == 1 || rl_byte_oriented ) && _rl_last_c_pos == new) return;
+     this case, NEW's display position sould be calculated.
+  */
+  if ( MB_CUR_MAX == 1 || rl_byte_oriented )
+    {
+      if ( _rl_last_c_pos == new )
+        return ;
+    }
+  else if( _rl_last_c_pos == _rl_col_width(data,0,new) )
+    return;
 #else
   if (_rl_last_c_pos == new) return;
 #endif
@@ -1594,11 +1601,7 @@
 #endif
     {
       if (MB_CUR_MAX > 1 && rl_byte_oriented == 0)
-	{
-	  tputs (_rl_term_cr, 1, _rl_output_character_function);
-	  for (i = 0; i < new; i++)
-	    putc (data[i], rl_outstream);
-	}
+        _rl_backspace(_rl_last_c_pos - _rl_col_width(data,0,new));
       else
 	_rl_backspace (_rl_last_c_pos - new);
     }
@@ -2117,7 +2120,7 @@
    scan from the beginning of the string to take the state into account. */
 static int
 _rl_col_width (str, start, end)
-     char *str;
+     const char *str;
      int start, end;
 {
   wchar_t wc;