∀ {pu : Lean.Compiler.LCNF.Purity} (fvarId fvarId_1 : Lean.FVarId),
  fvarId = fvarId_1 →
    ∀ (i i_1 : ℕ),
      i = i_1 →
        ∀ (y y_1 : Lean.FVarId),
          y = y_1 →
            ∀ (k k_1 : Lean.Compiler.LCNF.Code pu),
              k = k_1 →
                ∀ (h : pu = Lean.Compiler.LCNF.Purity.impure),
                  Lean.Compiler.LCNF.Code.uset fvarId i y k h = Lean.Compiler.LCNF.Code.uset fvarId_1 i_1 y_1 k_1 h