alt/error_redef2_1alt1_alt6.nit:31,6--7: Redef error: B::f1 is an inherited property. To redefine it, add the redef keyword.
alt/error_redef2_1alt1_alt6.nit:31,8--10: Redef error: error_redef2_1alt1_alt6#B#f1 redefines error_redef2_1alt1_alt6#A#f1 with 1 parameter(s), 0 expected. Signature is error_redef2_1alt1_alt6#B#f1