From 02f791d9fee1829b640525b1b6fcff1ff00c4c14 Mon Sep 17 00:00:00 2001
From: yuyi <yuyi98@163.com>
Date: Mon, 10 Jan 2022 15:12:46 +0800
Subject: [PATCH] checker: fix returning optional empty map (#13113)

---
 vlib/v/checker/containers.v          |  2 +-
 vlib/v/tests/option_empty_map_test.v | 13 +++++++++++++
 2 files changed, 14 insertions(+), 1 deletion(-)
 create mode 100644 vlib/v/tests/option_empty_map_test.v

diff --git a/vlib/v/checker/containers.v b/vlib/v/checker/containers.v
index 17bfa99aab..8db74f7501 100644
--- a/vlib/v/checker/containers.v
+++ b/vlib/v/checker/containers.v
@@ -202,7 +202,7 @@ pub fn (mut c Checker) map_init(mut node ast.MapInit) ast.Type {
 		sym := c.table.sym(c.expected_type)
 		if sym.kind == .map {
 			info := sym.map_info()
-			node.typ = c.expected_type
+			node.typ = c.expected_type.clear_flag(.optional)
 			node.key_type = info.key_type
 			node.value_type = info.value_type
 			return node.typ
diff --git a/vlib/v/tests/option_empty_map_test.v b/vlib/v/tests/option_empty_map_test.v
new file mode 100644
index 0000000000..fd5ad743e7
--- /dev/null
+++ b/vlib/v/tests/option_empty_map_test.v
@@ -0,0 +1,13 @@
+fn opt() ?map[string]string {
+	return {}
+}
+
+fn test_option_empty_map() {
+	x := opt() or {
+		assert false
+		return
+	}
+
+	dump(x)
+	assert '$x' == '{}'
+}