Rollup merge of rust-lang#142217 - Kivooeo:tf10, r=jieyouxu

`tests/ui`: A New Order [10/N]

Some `tests/ui/` housekeeping, to trim down number of tests directly under `tests/ui/`. Part of rust-lang#133895.

r? `@jieyouxu`

Author: matthiaskrgr

tests/ui/box/empty-alloc-deref-rvalue.rs

@@ -0,0 +1,10 @@
+//! Smoke test: dereferencing boxed zero-sized types (ZSTs) should not crash.
+//!
+//! Originally a regression test of github.com/rust-lang/rust/issues/13360
+//! but repurposed for a smoke test.
+
+//@ run-pass
+
+pub fn main() {
+    let _: () = *Box::new(());
+}

tests/ui/exclusive-drop-and-copy.rs renamed to tests/ui/derives/copy-drop-mutually-exclusive.rs

@@ -1,4 +1,4 @@
-// issue #20126
+//! Regression test for issue #20126: Copy and Drop traits are mutually exclusive
 
 #[derive(Copy, Clone)] //~ ERROR the trait `Copy` cannot be implemented
 struct Foo;

tests/ui/exclusive-drop-and-copy.stderr renamed to tests/ui/derives/copy-drop-mutually-exclusive.stderr

@@ -1,11 +1,11 @@
 error[E0184]: the trait `Copy` cannot be implemented for this type; the type has a destructor
-  --> $DIR/exclusive-drop-and-copy.rs:3:10
+  --> $DIR/copy-drop-mutually-exclusive.rs:3:10
    |
 LL | #[derive(Copy, Clone)]
    |          ^^^^ `Copy` not allowed on types with destructors
 
 error[E0184]: the trait `Copy` cannot be implemented for this type; the type has a destructor
-  --> $DIR/exclusive-drop-and-copy.rs:10:10
+  --> $DIR/copy-drop-mutually-exclusive.rs:10:10
    |
 LL | #[derive(Copy, Clone)]
    |          ^^^^ `Copy` not allowed on types with destructors