error: ~const can only be applied to `#[const_trait]` traits --> $DIR/call-generic-method-chain.rs:18:32 | LL | const fn equals_self(t: &T) -> bool { | ^^^^^^^^^ error: ~const can only be applied to `#[const_trait]` traits --> $DIR/call-generic-method-chain.rs:22:40 | LL | const fn equals_self_wrapper(t: &T) -> bool { | ^^^^^^^^^ error: aborting due to 2 previous errors