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-rw-r--r--compiler/rustc_transmute/src/lib.rs2
1 files changed, 1 insertions, 1 deletions
diff --git a/compiler/rustc_transmute/src/lib.rs b/compiler/rustc_transmute/src/lib.rs
index 31664ee6c4f..bdc98bcea5e 100644
--- a/compiler/rustc_transmute/src/lib.rs
+++ b/compiler/rustc_transmute/src/lib.rs
@@ -9,7 +9,7 @@ pub(crate) use rustc_data_structures::fx::{FxIndexMap as Map, FxIndexSet as Set}
 pub mod layout;
 mod maybe_transmutable;
 
-#[derive(Default)]
+#[derive(Copy, Clone, Debug, Default)]
 pub struct Assume {
     pub alignment: bool,
     pub lifetimes: bool,