From 565e6efb3f8eec06115e08296a0ea7ee4851687c Mon Sep 17 00:00:00 2001
From: Felipe Pena <felipensp@gmail.com>
Date: Mon, 3 Nov 2025 04:55:46 -0300
Subject: [PATCH] markused: fix fn marked as used when variable and fn uses
 same name (fix #25649) (#25650)

---
 vlib/v/markused/walker.v                      |  6 ++-
 .../tests/skip_unused/for_linked_list.run.out |  0
 .../for_linked_list.skip_unused.run.out       |  0
 vlib/v/tests/skip_unused/for_linked_list.vv   | 40 +++++++++++++++++++
 4 files changed, 45 insertions(+), 1 deletion(-)
 create mode 100644 vlib/v/tests/skip_unused/for_linked_list.run.out
 create mode 100644 vlib/v/tests/skip_unused/for_linked_list.skip_unused.run.out
 create mode 100644 vlib/v/tests/skip_unused/for_linked_list.vv

diff --git a/vlib/v/markused/walker.v b/vlib/v/markused/walker.v
index 7fb4bc9de..1c1a374a5 100644
--- a/vlib/v/markused/walker.v
+++ b/vlib/v/markused/walker.v
@@ -728,7 +728,11 @@ fn (mut w Walker) expr(node_ ast.Expr) {
 					} else if node.name in w.all_globals {
 						w.mark_global_as_used(node.name)
 					} else {
-						w.fn_by_name(node.name)
+						if (node.kind == .variable && node.obj is ast.Var && node.obj.is_used
+							&& node.obj.typ != 0 && w.table.type_kind(node.obj.typ) == .function)
+							|| (node.kind == .unresolved && node.name.contains('.')) {
+							w.fn_by_name(node.name)
+						}
 					}
 					if !w.uses_atomic && node.info is ast.IdentVar {
 						w.uses_atomic = node.info.typ.has_flag(.atomic_f)
diff --git a/vlib/v/tests/skip_unused/for_linked_list.run.out b/vlib/v/tests/skip_unused/for_linked_list.run.out
new file mode 100644
index 000000000..e69de29bb
diff --git a/vlib/v/tests/skip_unused/for_linked_list.skip_unused.run.out b/vlib/v/tests/skip_unused/for_linked_list.skip_unused.run.out
new file mode 100644
index 000000000..e69de29bb
diff --git a/vlib/v/tests/skip_unused/for_linked_list.vv b/vlib/v/tests/skip_unused/for_linked_list.vv
new file mode 100644
index 000000000..fd03be26e
--- /dev/null
+++ b/vlib/v/tests/skip_unused/for_linked_list.vv
@@ -0,0 +1,40 @@
+struct Node {
+mut:
+	value int
+	prev  ?&Node
+	next  ?&Node
+}
+
+struct LinkedList {
+mut:
+	length int
+	head   ?&Node
+}
+
+pub fn (mut l LinkedList) push(value int) {
+	mut new_node := &Node{
+		value: value
+	}
+
+	if mut head := l.head {
+		for head.next != none {
+			if mut head_next := head.next {
+				head = head_next
+			}
+		}
+		head.next = new_node
+		new_node.prev = head
+	} else {
+		l.head = new_node
+	}
+}
+
+fn main() {
+	mut list := LinkedList{
+		length: 0
+		head:   none
+	}
+	list.push(1)
+	list.push(2)
+	list.push(3)
+}
-- 
2.39.5