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Diffstat (limited to 'third_party/rust/zerocopy/tests/ui-nightly/transmute-mut-const.stderr')
| -rw-r--r-- | third_party/rust/zerocopy/tests/ui-nightly/transmute-mut-const.stderr | 42 |
1 files changed, 42 insertions, 0 deletions
diff --git a/third_party/rust/zerocopy/tests/ui-nightly/transmute-mut-const.stderr b/third_party/rust/zerocopy/tests/ui-nightly/transmute-mut-const.stderr new file mode 100644 index 0000000000..fa53ed09a9 --- /dev/null +++ b/third_party/rust/zerocopy/tests/ui-nightly/transmute-mut-const.stderr @@ -0,0 +1,42 @@ +warning: taking a mutable reference to a `const` item + --> tests/ui-nightly/transmute-mut-const.rs:20:52 + | +20 | const CONST_CONTEXT: &mut [u8; 2] = transmute_mut!(&mut ARRAY_OF_U8S); + | ^^^^^^^^^^^^^^^^^ + | + = note: each usage of a `const` item creates a new temporary + = note: the mutable reference will refer to this temporary, not the original `const` item +note: `const` item defined here + --> tests/ui-nightly/transmute-mut-const.rs:17:1 + | +17 | const ARRAY_OF_U8S: [u8; 2] = [0u8; 2]; + | ^^^^^^^^^^^^^^^^^^^^^^^^^^^ + = note: `#[warn(const_item_mutation)]` on by default + +error[E0658]: mutable references are not allowed in constants + --> tests/ui-nightly/transmute-mut-const.rs:20:52 + | +20 | const CONST_CONTEXT: &mut [u8; 2] = transmute_mut!(&mut ARRAY_OF_U8S); + | ^^^^^^^^^^^^^^^^^ + | + = note: see issue #57349 <https://github.com/rust-lang/rust/issues/57349> for more information + = help: add `#![feature(const_mut_refs)]` to the crate attributes to enable + +error[E0015]: cannot call non-const fn `transmute_mut::<'_, '_, [u8; 2], [u8; 2]>` in constants + --> tests/ui-nightly/transmute-mut-const.rs:20:37 + | +20 | const CONST_CONTEXT: &mut [u8; 2] = transmute_mut!(&mut ARRAY_OF_U8S); + | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ + | + = 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-nightly/transmute-mut-const.rs:20:57 + | +20 | const CONST_CONTEXT: &mut [u8; 2] = transmute_mut!(&mut ARRAY_OF_U8S); + | --------------------^^^^^^^^^^^^- + | | | + | | creates a temporary value 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` |