From 999c385b7f089f1c21e4a894f2ceb609498412bd Mon Sep 17 00:00:00 2001
From: Ned Palacios <7358345+nedpals@users.noreply.github.com>
Date: Tue, 30 Mar 2021 15:32:37 +0800
Subject: [PATCH] checker: add type check in interface fields (#9527)

---
 vlib/v/checker/checker.v | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/vlib/v/checker/checker.v b/vlib/v/checker/checker.v
index f8aa2a20eb..2e03236bb2 100644
--- a/vlib/v/checker/checker.v
+++ b/vlib/v/checker/checker.v
@@ -362,7 +362,9 @@ pub fn (mut c Checker) interface_decl(decl ast.InterfaceDecl) {
 	}
 	for i, field in decl.fields {
 		c.check_valid_snake_case(field.name, 'field name', field.pos)
-		c.ensure_type_exists(field.typ, field.pos) or { return }
+		if field.typ != table.Type(0) {
+			c.ensure_type_exists(field.typ, field.pos) or { return }
+		}
 		for j in 0 .. i {
 			if field.name == decl.fields[j].name {
 				c.error('field name `$field.name` duplicate', field.pos)