asan fuzzing fixes; fix incomplete multibyte chars in history expansion; new nosort GLOBSORT value

lib/readline/histexpand.c

@@ -1121,7 +1121,7 @@ history_expand (const char *hstring, char **output)
 
 	  c = tchar;
 	  memset (mb, 0, sizeof (mb));
-	  for (k = 0; k < MB_LEN_MAX; k++)
+	  for (k = 0; k < MB_LEN_MAX && i < l; k++)
 	    {
 	      mb[k] = (char)c;
 	      memset (&ps, 0, sizeof (mbstate_t));

lib/readline/misc.c

@@ -307,6 +307,10 @@ void
 _rl_start_using_history (void)
 {
   using_history ();
+#if 1
+  if (_rl_saved_line_for_history && _rl_saved_line_for_history->data)
+    _rl_free_undo_list ((UNDO_LIST *)_rl_saved_line_for_history->data);
+#endif
   _rl_free_saved_history_line ();
   _rl_history_search_pos = -99;		/* some random invalid history position */
 }

lib/readline/text.c

@@ -983,6 +983,9 @@ rl_insert (int count, int c)
 	break;
     }
 
+  /* If we didn't insert n and there are pending bytes, we need to insert
+     them if _rl_insert_char didn't do that on its own. */
+
   if (n != (unsigned short)-2)		/* -2 = sentinel value for having inserted N */
     {
       /* setting rl_pending_input inhibits setting rl_last_func so we do it
@@ -992,7 +995,6 @@ rl_insert (int count, int c)
       rl_executing_keyseq[rl_key_sequence_length = 0] = '\0';
       r = rl_execute_next (n);
     }
-
   return r;
 }