From 5dc5bf6a6bc5fbd3fd222f824be415be1a2085bd Mon Sep 17 00:00:00 2001
From: Andrew Kelley <andrew@ziglang.org>
Date: Fri, 5 Sep 2025 19:55:45 -0700
Subject: [PATCH] add compile error test case for new error

---
 .../packed_union_fields_mismatch.zig               | 14 ++++++++++++++
 1 file changed, 14 insertions(+)
 create mode 100644 test/cases/compile_errors/packed_union_fields_mismatch.zig

diff --git a/test/cases/compile_errors/packed_union_fields_mismatch.zig b/test/cases/compile_errors/packed_union_fields_mismatch.zig
new file mode 100644
index 0000000000..b2c1a5fbbc
--- /dev/null
+++ b/test/cases/compile_errors/packed_union_fields_mismatch.zig
@@ -0,0 +1,14 @@
+export fn entry1() void {
+    _ = packed union {
+        a: u1,
+        b: u2,
+    };
+}
+
+// error
+// backend=stage2
+// target=native
+//
+// :2:16: error: packed union has fields with mismatching bit sizes
+// :3:12: note: 1 bits here
+// :4:12: note: 2 bits here