1 files changed, 12 insertions, 0 deletions

diff --git a/src/test/ui/issues/issue-23649-1.rs b/src/test/ui/issues/issue-23649-1.rs
new file mode 100644
index 000000000..fc0c9a605
--- /dev/null
+++ b/src/test/ui/issues/issue-23649-1.rs
@@ -0,0 +1,12 @@
+// run-pass
+use std::mem;
+
+pub struct X([u8]);
+
+fn _f(x: &X) -> usize { match *x { X(ref x) =>  { x.len() } } }
+
+fn main() {
+    let b: &[u8] = &[11; 42];
+    let v: &X = unsafe { mem::transmute(b) };
+    assert_eq!(_f(v), 42);
+}