{motive : Lean.Compiler.LCNF.CacheAuxDeclResult → Sort u} →
  (ctorIdx : ℕ) →
    (t : Lean.Compiler.LCNF.CacheAuxDeclResult) →
      ctorIdx = t.ctorIdx → Lean.Compiler.LCNF.CacheAuxDeclResult.ctorElimType ctorIdx → motive t