T7293.hs:26:1: error: [-Woverlapping-patterns (in -Wdefault), -Werror=overlapping-patterns]
    Pattern match is redundant
    In an equation for ‘nth’: nth Nil _ = ...

T7293.hs:26:5: error: [-Winaccessible-code (in -Wdefault), -Werror=inaccessible-code]
    • Couldn't match type ‘'True’ with ‘'False’
      Inaccessible code in
        a pattern with constructor: Nil :: forall a. Vec a 'Zero,
        in an equation for ‘nth’
    • In the pattern: Nil
      In an equation for ‘nth’: nth Nil _ = undefined