From 6f0948e68e60a57764552e1633fa9487cfb537d5 Mon Sep 17 00:00:00 2001
From: Delyan Angelov <delian66@gmail.com>
Date: Sun, 5 Jan 2025 19:00:33 +0200
Subject: [PATCH] fix compiler panic for `./v -cc gcc
 vlib/x/json2/tests/decode_map_test.v`

---
 vlib/v/markused/walker.v | 12 +++++++++++-
 1 file changed, 11 insertions(+), 1 deletion(-)

diff --git a/vlib/v/markused/walker.v b/vlib/v/markused/walker.v
index e8a040fc2a6640..09d6644113299c 100644
--- a/vlib/v/markused/walker.v
+++ b/vlib/v/markused/walker.v
@@ -735,7 +735,17 @@ pub fn (mut w Walker) or_block(node ast.OrExpr) {
 }
 
 pub fn (mut w Walker) as_cast(node ast.AsCast) {
-	if node.typ.has_flag(.generic) || node.expr_type.has_flag(.generic) {
+	if node.typ == 0 {
+		return
+	}
+	if node.typ.has_flag(.generic) {
+		w.as_cast_type_names['some_generic_type'] = 'some_generic_name'
+		return
+	}
+	if node.expr_type == 0 {
+		return
+	}
+	if node.expr_type.has_flag(.generic) {
 		w.as_cast_type_names['some_generic_type'] = 'some_generic_name'
 		return
 	}