names-defaults-neg-ref.scala:3: error: in <$anon: A2235 with B2235>, multiple overloaded alternatives of method f define default arguments. The members with defaults are defined in trait B2235 and trait A2235. new A2235 with B2235 ^ names-defaults-neg-ref.scala:7: error: in class A, multiple overloaded alternatives of method foo define default arguments. class A { ^ names-defaults-neg-ref.scala:17: error: in class C, multiple overloaded alternatives of method bar define default arguments. The members with defaults are defined in class C and class B. class C extends B { ^ names-defaults-neg-ref.scala:21: error: overriding method bar$default$1 in class B of type => String; method bar$default$1 has incompatible type def bar(i: Int = 129083) = i ^ four errors found