Add test for issue 102389

src/test/ui/mir/issue-102389.rs

@@ -0,0 +1,8 @@
+enum Enum { A, B, C }
+
+fn func(inbounds: &Enum, array: &[i16; 3]) -> i16 {
+ array[*inbounds as usize]
+ //~^ ERROR [E0507]
+}
+
+fn main() {}

src/test/ui/mir/issue-102389.stderr

@@ -0,0 +1,9 @@
+error[E0507]: cannot move out of `*inbounds` which is behind a shared reference
+ --> $DIR/issue-102389.rs:4:11
+ |
+LL | array[*inbounds as usize]
+ | ^^^^^^^^^ move occurs because `*inbounds` has type `Enum`, which does not implement the `Copy` trait
+
+error: aborting due to previous error
+
+For more information about this error, try `rustc --explain E0507`.