From 6b0865dbf6bd9488e8005da0ad700a0a21f07ebf Mon Sep 17 00:00:00 2001
From: Alexander Medvednikov <alexander@medvednikov.com>
Date: Tue, 21 Apr 2026 16:58:49 +0300
Subject: [PATCH] tests: add test for pointer access on interface method value
 (fixes #22237)

---
 .gitignore                                    |  1 +
 ...ce_pointer_method_value_issue_22237_test.v | 41 +++++++++++++++++++
 2 files changed, 42 insertions(+)
 create mode 100644 vlib/v/tests/interfaces/interface_pointer_method_value_issue_22237_test.v

diff --git a/.gitignore b/.gitignore
index 73972055d..7f998a939 100644
--- a/.gitignore
+++ b/.gitignore
@@ -6,6 +6,7 @@
 !vlib/v/checker/tests/*.out
 !vlib/v/gen/c/testdata/nested_unary_minus_regression.vv
 !vlib/v/gen/c/testdata/nested_unary_minus_regression.out
+!vlib/v/tests/interfaces/interface_pointer_method_value_issue_22237_test.v
 
 # unignore c codegen testdata files
 !vlib/v/gen/c/testdata/*.vv
diff --git a/vlib/v/tests/interfaces/interface_pointer_method_value_issue_22237_test.v b/vlib/v/tests/interfaces/interface_pointer_method_value_issue_22237_test.v
new file mode 100644
index 000000000..60cfee0fc
--- /dev/null
+++ b/vlib/v/tests/interfaces/interface_pointer_method_value_issue_22237_test.v
@@ -0,0 +1,41 @@
+interface Named {
+	name string
+}
+
+fn (n Named) hello() string {
+	return 'hello ${n.name}'
+}
+
+struct Sa {
+	name string
+	age  int
+}
+
+fn (s Sa) ttt() string {
+	return '${s.name} // ${s.age}'
+}
+
+struct Sb {
+	name string
+}
+
+type Sum = Sa | Sb
+
+fn rebound_interface_method(t Sum) string {
+	match t {
+		Sa {
+			tt := t as Sa
+			mut out := unsafe { (&Sa(&t)).ttt }
+			iface := unsafe { &Named(&tt) }
+			out = iface.hello
+			return out()
+		}
+		Sb {
+			return 'sb'
+		}
+	}
+}
+
+fn test_reassign_bound_method_from_interface_pointer_inside_sumtype_match() {
+	assert rebound_interface_method(Sa{ name: 'mytype', age: 10 }) == 'hello mytype'
+}
-- 
2.39.5