base_isa_nil.nit:33,2--13: Warning: Expression is already a Object.
base_isa_nil.nit:36,2--22: Warning: Expression is already a nullable Object.
base_isa_nil.nit:43,2--22: Warning: Expression is already a nullable Object.
true
true
true
true
true
true
false
false
false
true
true
true