∀ {pu : Lean.Compiler.LCNF.Purity} (i : ℕ) (var : Lean.FVarId)
  (h : autoParam (pu = Lean.Compiler.LCNF.Purity.impure) Lean.Compiler.LCNF.LetValue._auto_7) (i_1 : ℕ)
  (var_1 : Lean.FVarId) (h_1 : autoParam (pu = Lean.Compiler.LCNF.Purity.impure) Lean.Compiler.LCNF.LetValue._auto_7),
  (Lean.Compiler.LCNF.LetValue.oproj i var h = Lean.Compiler.LCNF.LetValue.oproj i_1 var_1 h_1) =
    (i = i_1 ∧ var = var_1)