3 Reciever is null in rterror_null_receiver_alt6::Sys::(kernel::Sys::main) (alt/rterror_null_receiver_alt6.nit:31)
4 ,---- Stack trace -- - - -
5 | rterror_null_receiver_alt6::Sys::(kernel::Sys::main) (alt/rterror_null_receiver_alt6.nit:23)
6 `------------------- - - -