autoImplicitChainNameIssue.lean:8:11-8:15: error: unsolved goals
case nil
α✝ : Type u_1
as : List α✝
⊢ Palindrome (List.reverse [])
@palindrome_reverse : ∀ {α : Type u_1} {as : List α}, Palindrome as → Palindrome (List.reverse as)