From 1c9ac9dbb71b778ea99f1c15ad2b02e7f5d2e8fc Mon Sep 17 00:00:00 2001
From: Andrew Kelley <andrew@ziglang.org>
Date: Sat, 20 Sep 2025 18:51:08 -0700
Subject: [PATCH] add behavior test: avoid unused field function body compile
 error

---
 test/behavior/struct.zig | 23 +++++++++++++++++++++++
 1 file changed, 23 insertions(+)

diff --git a/test/behavior/struct.zig b/test/behavior/struct.zig
index 1f6d951f6d..03a49b70d1 100644
--- a/test/behavior/struct.zig
+++ b/test/behavior/struct.zig
@@ -2153,3 +2153,26 @@ test "align 1 struct parameter dereferenced and returned" {
         .little => try expect(s.a == 0x05040302),
     }
 }
+
+test "avoid unused field function body compile error" {
+    const Case = struct {
+        const This = @This();
+
+        const S = struct {
+            a: usize = 1,
+            b: fn () void = This.functionThatDoesNotCompile,
+        };
+
+        const s: S = .{};
+
+        fn entry() usize {
+            return s.a;
+        }
+
+        pub fn functionThatDoesNotCompile() void {
+            @compileError("told you so");
+        }
+    };
+
+    try expect(Case.entry() == 1);
+}