"self.listMap.map(m, m.v2 == 'z', m.v2).size() == 1": "no such key: v2",
			},
		},
		{name: "list access",
			obj: map[string]interface{}{
				"array": []interface{}{1, 1, 2, 2, 3, 3, 4, 5},
			},
			schema: objectTypePtr(map[string]schema.Structural{
				"array": listType(&integerType),
			}),
			valid: []string{
				"2 in self.array",
				"self.array.all(e, e > 0)",