From 6e343225a836cf8d6f384cc172e45f2a43fc04b4 Mon Sep 17 00:00:00 2001
From: Alexander Medvednikov <alexander@medvednikov.com>
Date: Wed, 25 Mar 2026 16:42:16 +0300
Subject: [PATCH] cgen: fix wrapping a generic in a struct causing builder
 error (fixes #22250)

---
 ..._fn_return_types_with_generic_struct_test.v | 18 ++++++++++++++++++
 1 file changed, 18 insertions(+)

diff --git a/vlib/v/tests/generics/generics_fn_return_types_with_generic_struct_test.v b/vlib/v/tests/generics/generics_fn_return_types_with_generic_struct_test.v
index b971d95b7..699fa381f 100644
--- a/vlib/v/tests/generics/generics_fn_return_types_with_generic_struct_test.v
+++ b/vlib/v/tests/generics/generics_fn_return_types_with_generic_struct_test.v
@@ -30,3 +30,21 @@ fn test_generic_fn_return_map_of_generic_struct() {
 	println(a)
 	assert '${a}' == '{}'
 }
+
+struct Issue22250Wrapper[T] {
+	value T
+}
+
+fn issue_22250_wrap_in_array[T](item Issue22250Wrapper[T]) Issue22250Wrapper[[]T] {
+	return Issue22250Wrapper[[]T]{
+		value: [item.value]
+	}
+}
+
+fn test_issue_22250_return_generic_struct_with_array_wrapped_type() {
+	wrapped := issue_22250_wrap_in_array[string](Issue22250Wrapper[string]{
+		value: 'a'
+	})
+	assert wrapped.value == ['a']
+	assert typeof(wrapped).name == 'Issue22250Wrapper[[]string]'
+}
-- 
2.39.5