diff --git a/rust-version b/rust-version
index 0b3196a7a280..42644dc12140 100644
--- a/rust-version
+++ b/rust-version
@@ -1 +1 @@
-150322f86d441752874a8bed603d71119f190b8b
+0afdf43dc1d9be4c8b422840166b51dd99e56a16
diff --git a/src/helpers.rs b/src/helpers.rs
index 5407eb120517..fc9bb19c882a 100644
--- a/src/helpers.rs
+++ b/src/helpers.rs
@@ -4,7 +4,7 @@ use std::mem;
 use rustc::mir;
 use rustc::ty::{
     self,
-    layout::{self, LayoutOf, Size, TyLayout},
+    layout::{self, LayoutOf, Size, TyAndLayout},
     List, TyCtxt,
 };
 use rustc_hir::def_id::{DefId, CRATE_DEF_INDEX};
@@ -84,8 +84,8 @@ pub trait EvalContextExt<'mir, 'tcx: 'mir>: crate::MiriEvalContextExt<'mir, 'tcx
         self.eval_libc(name)?.to_i32()
     }
 
-    /// Helper function to get the `TyLayout` of a `libc` type
-    fn libc_ty_layout(&mut self, name: &str) -> InterpResult<'tcx, TyLayout<'tcx>> {
+    /// Helper function to get the `TyAndLayout` of a `libc` type
+    fn libc_ty_layout(&mut self, name: &str) -> InterpResult<'tcx, TyAndLayout<'tcx>> {
         let this = self.eval_context_mut();
         let ty = this.resolve_path(&["libc", name]).monomorphic_ty(*this.tcx);
         this.layout_of(ty)
@@ -469,7 +469,7 @@ pub trait EvalContextExt<'mir, 'tcx: 'mir>: crate::MiriEvalContextExt<'mir, 'tcx
 
 pub fn immty_from_int_checked<'tcx>(
     int: impl Into<i128>,
-    layout: TyLayout<'tcx>,
+    layout: TyAndLayout<'tcx>,
 ) -> InterpResult<'tcx, ImmTy<'tcx, Tag>> {
     let int = int.into();
     Ok(ImmTy::try_from_int(int, layout).ok_or_else(|| {
@@ -479,7 +479,7 @@ pub fn immty_from_int_checked<'tcx>(
 
 pub fn immty_from_uint_checked<'tcx>(
     int: impl Into<u128>,
-    layout: TyLayout<'tcx>,
+    layout: TyAndLayout<'tcx>,
 ) -> InterpResult<'tcx, ImmTy<'tcx, Tag>> {
     let int = int.into();
     Ok(ImmTy::try_from_uint(int, layout).ok_or_else(|| {
diff --git a/tests/run-pass/arrays.rs b/tests/run-pass/arrays.rs
index b760d515395c..9589ffa1724c 100644
--- a/tests/run-pass/arrays.rs
+++ b/tests/run-pass/arrays.rs
@@ -35,7 +35,7 @@ fn slice_index() -> u8 {
     arr[5]
 }
 
-fn try_from() {
+fn from() {
     const N: usize = 16;
     type Array = [u8; N];
     let array: Array = [0; N];
@@ -43,6 +43,9 @@ fn try_from() {
 
     let result = <&Array>::try_from(slice);
     assert_eq!(&array, result.unwrap());
+
+    let vec = Vec::from(array);
+    assert_eq!(vec.len(), N);
 }
 
 fn eq() {
@@ -69,7 +72,7 @@ fn main() {
     assert_eq!(array_array(), [[5, 4], [3, 2], [1, 0]]);
     assert_eq!(array_repeat(), [42; 8]);
     assert_eq!(mini_array(), [42]);
-    try_from();
+    from();
     eq();
     debug();
 }