From afc710e024fa2e36a0c91f9b623f29f6200e6a77 Mon Sep 17 00:00:00 2001
From: Felipe Pena <felipensp@gmail.com>
Date: Thu, 7 Aug 2025 00:32:52 -0300
Subject: [PATCH] markused: fix array append c code dependency (fix #25057)
 (#25058)

---
 vlib/v/markused/walker.v  | 8 +++++---
 vlib/v/tests/runes_test.v | 7 +++++++
 2 files changed, 12 insertions(+), 3 deletions(-)
 create mode 100644 vlib/v/tests/runes_test.v

diff --git a/vlib/v/markused/walker.v b/vlib/v/markused/walker.v
index 0debfd7f0..62f1f2670 100644
--- a/vlib/v/markused/walker.v
+++ b/vlib/v/markused/walker.v
@@ -633,6 +633,11 @@ fn (mut w Walker) expr(node_ ast.Expr) {
 							w.fn_decl(mut &ast.FnDecl(opmethod.source_fn))
 						}
 					}
+				} else {
+					if !w.uses_append && node.op == .left_shift && (sym.kind == .array
+						|| (sym.kind == .alias && w.table.final_sym(node.left_type).kind == .array)) {
+						w.uses_append = true
+					}
 				}
 			}
 			right_type := if node.right_type == 0 && mut node.right is ast.TypeNode {
@@ -658,9 +663,6 @@ fn (mut w Walker) expr(node_ ast.Expr) {
 			if !w.uses_eq && node.op in [.eq, .ne] {
 				w.uses_eq = true
 			}
-			if !w.uses_append && node.op == .left_shift && !w.is_direct_array_access {
-				w.uses_append = true
-			}
 		}
 		ast.IfGuardExpr {
 			w.expr(node.expr)
diff --git a/vlib/v/tests/runes_test.v b/vlib/v/tests/runes_test.v
new file mode 100644
index 000000000..fcf5e7891
--- /dev/null
+++ b/vlib/v/tests/runes_test.v
@@ -0,0 +1,7 @@
+module main
+
+fn test_main() {
+	s := 'hello'
+	arr := s.runes()
+	assert arr.len == 5
+}
-- 
2.39.5