safe transmute: tweak tracing

ref: https://github.com/rust-lang/rust/pull/92268#discussion_r925246903 ref: https://github.com/rust-lang/rust/pull/92268#discussion_r925250811 ref: https://github.com/rust-lang/rust/pull/92268#discussion_r925255782
2022-07-21 17:28:24 +00:00
parent 0fa70c3b12
commit c0d0ce95eb
5 changed files with 16 additions and 21 deletions
--- a/compiler/rustc_transmute/src/lib.rs
+++ b/compiler/rustc_transmute/src/lib.rs
@@ -8,6 +8,9 @@
 )]
 #![allow(dead_code, unused_variables)]

+#[macro_use]
+extern crate tracing;
+
 #[cfg(feature = "rustc")]
 pub(crate) use rustc_data_structures::fx::{FxHashMap as Map, FxHashSet as Set};