1 files changed, 36 insertions, 0 deletions
diff --git a/third_party/rust/zerocopy/tests/ui-msrv/transmute-mut-size-decrease.stderr b/third_party/rust/zerocopy/tests/ui-msrv/transmute-mut-size-decrease.stderr
new file mode 100644
index 0000000000..2bfc21898b
--- /dev/null
+++ b/third_party/rust/zerocopy/tests/ui-msrv/transmute-mut-size-decrease.stderr
@@ -0,0 +1,36 @@
+error[E0512]: cannot transmute between types of different sizes, or dependently-sized types
+  --> tests/ui-msrv/transmute-mut-size-decrease.rs:17:32
+   |
+17 | const DECREASE_SIZE: &mut u8 = transmute_mut!(&mut [0u8; 2]);
+   |                                ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
+   |
+   = note: source type: `[u8; 2]` (16 bits)
+   = note: target type: `u8` (8 bits)
+   = note: this error originates in the macro `$crate::assert_size_eq` (in Nightly builds, run with -Z macro-backtrace for more info)
+
+error[E0658]: mutable references are not allowed in constants
+  --> tests/ui-msrv/transmute-mut-size-decrease.rs:17:47
+   |
+17 | const DECREASE_SIZE: &mut u8 = transmute_mut!(&mut [0u8; 2]);
+   |                                               ^^^^^^^^^^^^^
+   |
+   = note: see issue #57349 <https://github.com/rust-lang/rust/issues/57349> for more information
+
+error[E0015]: cannot call non-const fn `transmute_mut::<[u8; 2], u8>` in constants
+  --> tests/ui-msrv/transmute-mut-size-decrease.rs:17:32
+   |
+17 | const DECREASE_SIZE: &mut u8 = transmute_mut!(&mut [0u8; 2]);
+   |                                ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
+   |
+   = note: calls in constants are limited to constant functions, tuple structs and tuple variants
+   = note: this error originates in the macro `transmute_mut` (in Nightly builds, run with -Z macro-backtrace for more info)
+
+error[E0716]: temporary value dropped while borrowed
+  --> tests/ui-msrv/transmute-mut-size-decrease.rs:17:52
+   |
+17 | const DECREASE_SIZE: &mut u8 = transmute_mut!(&mut [0u8; 2]);
+   |                                --------------------^^^^^^^^-
+   |                                |                   |
+   |                                |                   creates a temporary which is freed while still in use
+   |                                temporary value is freed at the end of this statement
+   |                                using this value as a constant requires that borrow lasts for `'static`