Test.

tests/sets.v

-From stdpp Require Import sets.
+From stdpp Require Import sets gmap.
 
 Lemma foo `{Set_ A C} (x : A) (X Y : C) : x ∈ X ∩ Y → x ∈ X.
 Proof. intros Hx. set_unfold in Hx. tauto. Qed.
@@ -7,3 +7,7 @@ Proof. intros Hx. set_unfold in Hx. tauto. Qed.
 Lemma elem_of_list_bind_again {A B} (x : B) (l : list A) f :
   x ∈ l ≫= f ↔ ∃ y, x ∈ f y ∧ y ∈ l.
 Proof. set_solver. Qed.
+
+(** Should not leave any evars, see issue #163 *)
+Goal {[0]} ∪ dom (∅ : gmap nat nat) ≠ ∅.
+Proof. set_solver. Qed.