From 4ed06a34f7d2908795dbfc44fc91ec12df00865e Mon Sep 17 00:00:00 2001
From: CreeperFace <165158232+dy-tea@users.noreply.github.com>
Date: Sun, 14 Dec 2025 08:53:29 +0000
Subject: [PATCH] cgen: use final_sym for elem_sym in index_of_array (fix
 #25960) (#25961)

---
 vlib/v/gen/c/index.v                                   |  2 +-
 .../alias_set_elem_to_alias_of_fixed_array_test.v      | 10 ++++++++++
 2 files changed, 11 insertions(+), 1 deletion(-)
 create mode 100644 vlib/v/tests/aliases/alias_set_elem_to_alias_of_fixed_array_test.v

diff --git a/vlib/v/gen/c/index.v b/vlib/v/gen/c/index.v
index 7cc5fbc47..c68c93568 100644
--- a/vlib/v/gen/c/index.v
+++ b/vlib/v/gen/c/index.v
@@ -170,7 +170,7 @@ fn (mut g Gen) index_of_array(node ast.IndexExpr, sym ast.TypeSymbol) {
 	left_is_ptr := node.left_type.is_ptr()
 	info := sym.info as ast.Array
 	elem_type := info.elem_type
-	elem_sym := g.table.sym(elem_type)
+	elem_sym := g.table.final_sym(elem_type)
 	elem_type_str := if elem_sym.kind == .function {
 		'voidptr'
 	} else {
diff --git a/vlib/v/tests/aliases/alias_set_elem_to_alias_of_fixed_array_test.v b/vlib/v/tests/aliases/alias_set_elem_to_alias_of_fixed_array_test.v
new file mode 100644
index 000000000..270c17dbe
--- /dev/null
+++ b/vlib/v/tests/aliases/alias_set_elem_to_alias_of_fixed_array_test.v
@@ -0,0 +1,10 @@
+type Pixel = [4]u8
+
+fn test_setting_of_element_of_array_to_aliased_fixed_array() {
+	mut px := Pixel([u8(1), 2, 3, 4]!)
+	mut pixels := []Pixel{len: 64}
+	pixels[5] = px
+	assert pixels[4] == Pixel{}
+	assert pixels[5] == px
+	assert pixels[6] == Pixel{}
+}
-- 
2.39.5