alt/error_redef2_1alt4_alt4.nit:29,6--7: Redef error: B::f1 is an inherited property. To redefine it, add the redef keyword.
alt/error_redef2_1alt4_alt4.nit:29,19: Redef error: error_redef2_1alt4_alt4#B#f1 redefines error_redef2_1alt4_alt4#A#f1 with 0 parameter(s), 1 expected. Signature is error_redef2_1alt4_alt4#B#f1(i: Int): Int