1 files changed, 33 insertions, 0 deletions

diff --git a/tests/ui/issues/issue-48131.rs b/tests/ui/issues/issue-48131.rs
new file mode 100644
index 00000000000..df98547084d
--- /dev/null
+++ b/tests/ui/issues/issue-48131.rs
@@ -0,0 +1,33 @@
+// revisions: mir thir
+// [thir]compile-flags: -Z thir-unsafeck
+
+// This note is annotated because the purpose of the test
+// is to ensure that certain other notes are not generated.
+#![deny(unused_unsafe)] //~ NOTE
+
+
+// (test that no note is generated on this unsafe fn)
+pub unsafe fn a() {
+    fn inner() {
+        unsafe { /* unnecessary */ } //~ ERROR unnecessary `unsafe`
+                                     //~^ NOTE
+    }
+
+    inner()
+}
+
+pub fn b() {
+    // (test that no note is generated on this unsafe block)
+    unsafe {
+        fn inner() {
+            unsafe { /* unnecessary */ } //~ ERROR unnecessary `unsafe`
+                                         //~^ NOTE
+        }
+        // `()` is fine to zero-initialize as it is zero sized and inhabited.
+        let () = ::std::mem::zeroed();
+
+        inner()
+    }
+}
+
+fn main() {}