diff --git a/rust-version b/rust-version
index 3e7048ac72c..b72e1f53ef1 100644
--- a/rust-version
+++ b/rust-version
@@ -1 +1 @@
-5c45343f11fbf93cf4e15568aee3ff3f2f287466
+1cbd8a4d686d1411105f26cddf876c5994e69593
diff --git a/src/fn_call.rs b/src/fn_call.rs
index 5397c048f9f..e9377d89bca 100644
--- a/src/fn_call.rs
+++ b/src/fn_call.rs
@@ -361,7 +361,7 @@ fn emulate_foreign_item(
                     // Directly return to caller.
                     StackPopCleanup::Goto(Some(ret)),
                 )?;
-                let mut args = this.frame().mir.args_iter();
+                let mut args = this.frame().body.args_iter();
 
                 let arg_local = args.next().ok_or_else(||
                     InterpError::AbiViolation(
diff --git a/src/lib.rs b/src/lib.rs
index 8577bc4714e..d0b7111bb06 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -125,7 +125,7 @@ pub fn create_ecx<'a, 'mir: 'a, 'tcx: 'mir>(
         StackPopCleanup::None { cleanup: true },
     )?;
 
-    let mut args = ecx.frame().mir.args_iter();
+    let mut args = ecx.frame().body.args_iter();
 
     // First argument: pointer to `main()`.
     let main_ptr = ecx.memory_mut().create_fn_alloc(main_instance);
@@ -252,7 +252,7 @@ pub fn eval_main<'a, 'tcx: 'a>(
             };
             e.print_backtrace();
             if let Some(frame) = ecx.stack().last() {
-                let block = &frame.mir.basic_blocks()[frame.block];
+                let block = &frame.body.basic_blocks()[frame.block];
                 let span = if frame.stmt < block.statements.len() {
                     block.statements[frame.stmt].source_info.span
                 } else {
@@ -451,7 +451,7 @@ fn box_alloc(
             StackPopCleanup::None { cleanup: true },
         )?;
 
-        let mut args = ecx.frame().mir.args_iter();
+        let mut args = ecx.frame().body.args_iter();
         let layout = ecx.layout_of(dest.layout.ty.builtin_deref(false).unwrap().ty)?;
 
         // First argument: `size`.
diff --git a/src/tls.rs b/src/tls.rs
index b38b15c3e18..4101a3ab39b 100644
--- a/src/tls.rs
+++ b/src/tls.rs
@@ -148,7 +148,7 @@ fn run_tls_dtors(&mut self) -> InterpResult<'tcx> {
                 Some(ret_place),
                 StackPopCleanup::None { cleanup: true },
             )?;
-            let arg_local = this.frame().mir.args_iter().next().ok_or_else(
+            let arg_local = this.frame().body.args_iter().next().ok_or_else(
                 || InterpError::AbiViolation("TLS dtor does not take enough arguments.".to_owned()),
             )?;
             let dest = this.eval_place(&mir::Place::Base(mir::PlaceBase::Local(arg_local)))?;