Fix fallout

Author: flip1995

clippy_lints/src/large_stack_arrays.rs

@@ -1,7 +1,7 @@
 use rustc::hir::*;
 use rustc::lint::{LateContext, LateLintPass, LintArray, LintPass};
 use rustc::mir::interpret::ConstValue;
-use rustc::ty;
+use rustc::ty::{self, ConstKind};
 use rustc::{declare_tool_lint, impl_lint_pass};
 
 use if_chain::if_chain;
@@ -43,7 +43,8 @@ impl<'a, 'tcx> LateLintPass<'a, 'tcx> for LargeStackArrays {
         if_chain! {
             if let ExprKind::Repeat(_, _) = expr.kind;
             if let ty::Array(element_type, cst) = cx.tables.expr_ty(expr).kind;
-            if let ConstValue::Scalar(element_count) = cst.val;
+            if let ConstKind::Value(val) = cst.val;
+            if let ConstValue::Scalar(element_count) = val;
             if let Ok(element_count) = element_count.to_machine_usize(&cx.tcx);
             if let Ok(element_size) = cx.layout_of(element_type).map(|l| l.size.bytes());
             if self.maximum_allowed_size < element_count * element_size;