1 files changed, 27 insertions, 0 deletions
diff --git a/tests/ui/consts/missing_span_in_backtrace.rs b/tests/ui/consts/missing_span_in_backtrace.rs
new file mode 100644
index 000000000..dd2b81c5a
--- /dev/null
+++ b/tests/ui/consts/missing_span_in_backtrace.rs
@@ -0,0 +1,27 @@
+// compile-flags: -Z ui-testing=no
+// normalize-stderr-test "alloc[0-9]+" -> "ALLOC_ID"
+
+#![feature(const_swap)]
+#![feature(const_mut_refs)]
+use std::{
+    mem::{self, MaybeUninit},
+    ptr,
+};
+
+const X: () = {
+    let mut ptr1 = &1;
+    let mut ptr2 = &2;
+
+    // Swap them, bytewise.
+    unsafe {
+        ptr::swap_nonoverlapping(
+            &mut ptr1 as *mut _ as *mut MaybeUninit<u8>,
+            &mut ptr2 as *mut _ as *mut MaybeUninit<u8>,
+            mem::size_of::<&i32>(),
+        );
+    }
+};
+
+fn main() {
+    X
+}