∀ {G : Type u_1} [inst : MeasurableSpace G] [inst_1 : TopologicalSpace G] [BorelSpace G] {μ : MeasureTheory.Measure G}
  [inst_3 : AddGroup G] [IsTopologicalAddGroup G] [μ.IsAddLeftInvariant] (U : Set G),
  IsOpen U → U.Nonempty → μ U ≠ ⊤ → ∀ {K : Set G}, IsCompact K → μ K < ⊤