alow_mixing breaks with ->> arrows

Question

Shouldn't this work without errors (it is, if you replace the link ->> with  -> ?

@startuml
allow_mixing
class foo1
usecase foo2
actor foo3
foo1 <-> foo2

foo3 ->> foo2: implement
@enduml

Answer 1

->> is only in sequence diagram

use ..|> for implement (UML)

Comments

ok.
then why the below works fine for component diagram?

@startuml
component a {
}
component b {
}
a ->> b: test

@enduml

---

I don't know. I am not the developper, only a user.

In documentation ->> is only in sequence diagram

---

well, allow_mixing is hinting that ->> could have worked in my example too... :) especially that it works in pure component diagram