btr0btr.c:

  Fix bug: if the user created a prefix column key on a fixed length char column, then InnoDB claimed in CHECK TABLE that the table is corrupt
dict0dict.c:
  Fix bug 1151: if the user created a prefix column primary key on a fixed length char column, then InnoDB crashed in a simple SELECT

innobase/btr/btr0btr.c

@@ -2376,8 +2376,15 @@ btr_index_rec_validate(
 
 		type = dict_index_get_nth_type(index, i);
 		
-		if (len != UNIV_SQL_NULL && dtype_is_fixed_size(type)
-		    			&& len != dtype_get_fixed_size(type)) {
+		if ((dict_index_get_nth_field(index, i)->prefix_len == 0
+		    && len != UNIV_SQL_NULL && dtype_is_fixed_size(type)
+		    && len != dtype_get_fixed_size(type))
+		   ||
+		   (dict_index_get_nth_field(index, i)->prefix_len > 0
+		    && len != UNIV_SQL_NULL && dtype_is_fixed_size(type)
+		    && len !=
+			   dict_index_get_nth_field(index, i)->prefix_len)) {
+
 			fprintf(stderr,
 "InnoDB: Record in index %s in table %s, page %lu, at offset %lu\n"
 "InnoDB: field %lu len is %lu, should be %lu\n",

innobase/dict/dict0dict.c

@@ -1596,6 +1596,13 @@ dict_index_build_internal_clust(
 				break;
 			}
 
+			if (dict_index_get_nth_field(new_index, i)->prefix_len
+			    > 0) {
+				new_index->trx_id_offset = 0;
+
+				break;
+			}
+
 			new_index->trx_id_offset += fixed_size;
 		}