From ca2178dd9fe7f036537414def4593258ca4adb7b Mon Sep 17 00:00:00 2001
From: Takayuki Maeda <takoyaki0316@gmail.com>
Date: Fri, 6 Mar 2026 22:19:11 +0900
Subject: [PATCH] add UI regression test for offset_of! recovery

---
 tests/ui/offset-of/offset-of-error-recovery.rs     | 14 ++++++++++++++
 tests/ui/offset-of/offset-of-error-recovery.stderr |  8 ++++++++
 2 files changed, 22 insertions(+)
 create mode 100644 tests/ui/offset-of/offset-of-error-recovery.rs
 create mode 100644 tests/ui/offset-of/offset-of-error-recovery.stderr

diff --git a/tests/ui/offset-of/offset-of-error-recovery.rs b/tests/ui/offset-of/offset-of-error-recovery.rs
new file mode 100644
index 000000000000..659140877cd1
--- /dev/null
+++ b/tests/ui/offset-of/offset-of-error-recovery.rs
@@ -0,0 +1,14 @@
+use std::mem::offset_of;
+
+struct S {
+    x: (),
+}
+
+impl S {
+    fn a() {
+        offset_of!(Self, Self::x);
+        //~^ ERROR offset_of expects dot-separated field and variant names
+    }
+}
+
+fn main() {}
diff --git a/tests/ui/offset-of/offset-of-error-recovery.stderr b/tests/ui/offset-of/offset-of-error-recovery.stderr
new file mode 100644
index 000000000000..fce3616c213e
--- /dev/null
+++ b/tests/ui/offset-of/offset-of-error-recovery.stderr
@@ -0,0 +1,8 @@
+error: offset_of expects dot-separated field and variant names
+  --> $DIR/offset-of-error-recovery.rs:9:26
+   |
+LL |         offset_of!(Self, Self::x);
+   |                          ^^^^^^^
+
+error: aborting due to 1 previous error
+