Update fuzz tests

checker/checker.go

@@ -217,7 +217,7 @@ func (v *checker) IdentifierNode(node *ast.IdentifierNode) Nature {
 		return unknown
 	}
 
-	return v.ident(node, node.Value, v.config.Env.Strict, true)
+	return v.ident(node, node.Value, v.config.Strict, true)
 }
 
 // ident method returns type of environment variable, builtin or function.

conf/config.go

@@ -62,9 +62,9 @@ func New(env any) *Config {
 }
 
 func (c *Config) WithEnv(env any) {
-	c.Strict = true
 	c.EnvObject = env
 	c.Env = Env(env)
+	c.Strict = c.Env.Strict
 }
 
 func (c *Config) ConstExpr(name string) {

conf/env.go

@@ -36,6 +36,7 @@ func Env(env any) Nature {
 		n := Nature{
 			Type:   v.Type(),
 			Fields: make(map[string]Nature, v.Len()),
+			Strict: true,
 		}
 
 		for _, key := range v.MapKeys() {

expr_test.go

@@ -2716,3 +2716,11 @@ func TestIssue758_filter_map_index(t *testing.T) {
 
 	require.Equal(t, expected, result)
 }
+
+func TestExpr_wierd_cases(t *testing.T) {
+	env := map[string]any{}
+
+	_, err := expr.Compile(`A(A)`, expr.Env(env))
+	require.Error(t, err)
+	require.Contains(t, err.Error(), "unknown name A")
+}

test/fuzz/fuzz_test.go

@@ -51,6 +51,9 @@ func FuzzExpr(f *testing.F) {
 		regexp.MustCompile(`cannot parse .* as .*`),
 		regexp.MustCompile(`operator "in" not defined on .*`),
 		regexp.MustCompile(`cannot sum .*`),
+		regexp.MustCompile(`index out of range: .* \(array length is .*\)`),
+		regexp.MustCompile(`cannot use <nil> as argument \(type .*\) to call .*`),
+		regexp.MustCompile(`illegal base64 data at input byte .*`),
 	}
 
 	env := NewEnv()