3 files changed, 4 insertions, 4 deletions
diff --git a/src/librustc_mir/interpret/memory.rs b/src/librustc_mir/interpret/memory.rs
index f51e38eb1ea..62bb4c8d556 100644
--- a/src/librustc_mir/interpret/memory.rs
+++ b/src/librustc_mir/interpret/memory.rs
@@ -836,7 +836,7 @@ impl<'mir, 'tcx, M: Machine<'mir, 'tcx>> Memory<'mir, 'tcx, M> {
         src: impl IntoIterator<Item = u8>,
     ) -> InterpResult<'tcx> {
         let src = src.into_iter();
-        let size = Size::from_bytes(src.size_hint().0 as u64);
+        let size = Size::from_bytes(src.size_hint().0);
         // `write_bytes` checks that this lower bound `size` matches the upper bound and reality.
         let ptr = match self.check_ptr_access(ptr, size, Align::from_bytes(1).unwrap())? {
             Some(ptr) => ptr,
diff --git a/src/librustc_mir/interpret/operand.rs b/src/librustc_mir/interpret/operand.rs
index f6be92174ad..409c958ac39 100644
--- a/src/librustc_mir/interpret/operand.rs
+++ b/src/librustc_mir/interpret/operand.rs
@@ -1,7 +1,7 @@
 //! Functions concerning immediate values and operands, and reading from operands.
 //! All high-level functions to read from memory work on operands as sources.
 
-use std::convert::{TryFrom, TryInto};
+use std::convert::TryFrom;
 
 use super::{InterpCx, MPlaceTy, Machine, MemPlace, Place, PlaceTy};
 pub use rustc::mir::interpret::ScalarMaybeUndef;
@@ -570,7 +570,7 @@ impl<'mir, 'tcx, M: Machine<'mir, 'tcx>> InterpCx<'mir, 'tcx, M> {
                 // where none should happen.
                 let ptr = Pointer::new(
                     self.tcx.alloc_map.lock().create_memory_alloc(data),
-                    Size::from_bytes(start.try_into().unwrap()), // offset: `start`
+                    Size::from_bytes(start), // offset: `start`
                 );
                 Operand::Immediate(Immediate::new_slice(
                     self.tag_global_base_pointer(ptr).into(),
diff --git a/src/librustc_mir/interpret/place.rs b/src/librustc_mir/interpret/place.rs
index ae754ab4feb..ef347172555 100644
--- a/src/librustc_mir/interpret/place.rs
+++ b/src/librustc_mir/interpret/place.rs
@@ -739,7 +739,7 @@ where
                 ),
                 Immediate::Scalar(ScalarMaybeUndef::Scalar(Scalar::Raw { size, .. })) => {
                     assert_eq!(
-                        Size::from_bytes(size.into()),
+                        Size::from_bytes(size),
                         dest.layout.size,
                         "Size mismatch when writing bits"
                     )