From c7b8da7ffe21fb21f60c6feb7b683dee0ed9eadf Mon Sep 17 00:00:00 2001
From: yuyi <yuyi98@163.com>
Date: Mon, 8 Jan 2024 18:41:11 +0800
Subject: [PATCH] checker: fix lambda expr with result (#20433)

---
 vlib/v/checker/lambda_expr.v                | 2 +-
 vlib/v/tests/lambda_expr_with_result_test.v | 8 ++++++++
 2 files changed, 9 insertions(+), 1 deletion(-)
 create mode 100644 vlib/v/tests/lambda_expr_with_result_test.v

diff --git a/vlib/v/checker/lambda_expr.v b/vlib/v/checker/lambda_expr.v
index 31d968b087b2f8..122d4c94701107 100644
--- a/vlib/v/checker/lambda_expr.v
+++ b/vlib/v/checker/lambda_expr.v
@@ -63,7 +63,7 @@ pub fn (mut c Checker) lambda_expr(mut node ast.LambdaExpr, exp_typ ast.Type) as
 
 		mut stmts := []ast.Stmt{}
 		mut has_return := false
-		if return_type == ast.void_type {
+		if return_type.clear_flags(.option, .result) == ast.void_type {
 			stmts << ast.ExprStmt{
 				pos: node.pos
 				expr: node.expr
diff --git a/vlib/v/tests/lambda_expr_with_result_test.v b/vlib/v/tests/lambda_expr_with_result_test.v
new file mode 100644
index 00000000000000..890f883f89099d
--- /dev/null
+++ b/vlib/v/tests/lambda_expr_with_result_test.v
@@ -0,0 +1,8 @@
+fn test_lambda_expr_with_result() {
+	take_lambda(|| println('abc'))
+	assert true
+}
+
+fn take_lambda(l fn () !) {
+	l() or { panic(err) }
+}