1 files changed, 23 insertions, 0 deletions
diff --git a/src/test/ui/borrowck/move-in-pattern-mut.rs b/src/test/ui/borrowck/move-in-pattern-mut.rs
new file mode 100644
index 000000000..b5c275bf2
--- /dev/null
+++ b/src/test/ui/borrowck/move-in-pattern-mut.rs
@@ -0,0 +1,23 @@
+// Issue #63988
+#[derive(Debug)]
+struct S;
+fn foo(_: Option<S>) {}
+
+enum E {
+    V {
+        s: S,
+    }
+}
+fn bar(_: E) {}
+
+fn main() {
+    let s = Some(S);
+    if let Some(mut x) = s {
+        x = S;
+    }
+    foo(s); //~ ERROR use of partially moved value: `s`
+    let mut e = E::V { s: S };
+    let E::V { s: mut x } = e;
+    x = S;
+    bar(e); //~ ERROR use of partially moved value: `e`
+}