ha_innobase.cc:

  Fix the crashes reported by Peter; SHOW CREATE does not call external_lock before calling ::info, and consequently the trx struct in prebuilt is obsolete; setting trx->op_info caused erratic memory corruption in mysqldump

sql/ha_innobase.cc

@@ -2953,10 +2953,6 @@ ha_innobase::records_in_range(
 
    	DBUG_ENTER("records_in_range");
    	
-	if (prebuilt->trx) {
-		prebuilt->trx->op_info = "estimating range size";
-	}
-   	
 	active_index = keynr;
 
 	key = table->key_info + active_index;
@@ -2989,10 +2985,6 @@ ha_innobase::records_in_range(
 
     	my_free((char*) key_val_buff2, MYF(0));
    	
-	if (prebuilt->trx) {
-		prebuilt->trx->op_info = "";
-	}
-   	
 	DBUG_RETURN((ha_rows) n_rows);
 }
 
@@ -3013,11 +3005,6 @@ ha_innobase::estimate_number_of_rows(void)
 	ulonglong	estimate;
 	ulonglong	data_file_length;
 	
-	if (prebuilt->trx) {
-		prebuilt->trx->op_info =
-				"estimating upper bound of table size";
-	}   	
-
  	DBUG_ENTER("info");
 
 	index = dict_table_get_first_index_noninline(prebuilt->table);
@@ -3033,10 +3020,6 @@ ha_innobase::estimate_number_of_rows(void)
 
 	estimate = 2 * data_file_length / dict_index_calc_min_rec_len(index);
 	
-	if (prebuilt->trx) {
-		prebuilt->trx->op_info = "";
-	}
-
 	return((ha_rows) estimate);
 }
 
@@ -3076,10 +3059,6 @@ ha_innobase::info(
 
  	DBUG_ENTER("info");
    	
-	if (prebuilt->trx) {
-		prebuilt->trx->op_info = "calculating table stats";
-	}
-   	
  	ib_table = prebuilt->table;
 
  	if (flag & HA_STATUS_TIME) {
@@ -3150,10 +3129,6 @@ ha_innobase::info(
 				       trx_get_error_info(prebuilt->trx));
   	}
    	
-	if (prebuilt->trx) {
-		prebuilt->trx->op_info = "";
-	}
-   	
   	DBUG_VOID_RETURN;
 }