tree_store#set ~row:loc_row ~column:id_col
("Error location " ^ string_of_int (!idx1+1) ^
", error message " ^ string_of_int (!idx1+1) ^ ".1" ^
tree_store#set ~row:loc_row ~column:id_col
("Error location " ^ string_of_int (!idx1+1) ^
", error message " ^ string_of_int (!idx1+1) ^ ".1" ^