From c59a3b905752b9e454fb3e71eb95d8095c2e940e Mon Sep 17 00:00:00 2001
From: Anton Medvedev <anton@medv.io>
Date: Tue, 24 Jan 2023 19:34:36 +0100
Subject: [PATCH] Fix type check for in operator with any on rhs

---
 checker/checker.go      |  2 +-
 checker/checker_test.go | 11 +++++++++++
 2 files changed, 12 insertions(+), 1 deletion(-)

diff --git a/checker/checker.go b/checker/checker.go
index c90a2e2d1..2b32db645 100644
--- a/checker/checker.go
+++ b/checker/checker.go
@@ -316,7 +316,7 @@ func (v *visitor) BinaryNode(node *ast.BinaryNode) (reflect.Type, info) {
 		if isAny(l) && anyOf(r, isString, isArray, isMap) {
 			return boolType, info{}
 		}
-		if isAny(l) && isAny(r) {
+		if isAny(r) {
 			return boolType, info{}
 		}
 
diff --git a/checker/checker_test.go b/checker/checker_test.go
index 86a18666e..7d5c994fa 100644
--- a/checker/checker_test.go
+++ b/checker/checker_test.go
@@ -777,3 +777,14 @@ func TestCheck_cast_to_expected_works_with_interface(t *testing.T) {
 		require.NoError(t, err)
 	})
 }
+
+func TestCheck_operator_in_works_with_interfaces(t *testing.T) {
+	tree, err := parser.Parse(`'Tom' in names`)
+	require.NoError(t, err)
+
+	config := conf.New(nil)
+	expr.AllowUndefinedVariables()(config)
+
+	_, err = checker.Check(tree, config)
+	require.NoError(t, err)
+}