From 507381ed0367f27e8804a1da33f8565c96a260ce Mon Sep 17 00:00:00 2001
From: Oliver Scherer <github35764891676564198441@oli-obk.de>
Date: Sat, 13 Oct 2018 23:38:31 +0200
Subject: Fix ICE and report a human readable error

---
 src/librustc/ty/cast.rs | 2 ++
 1 file changed, 2 insertions(+)

(limited to 'src/librustc')

diff --git a/src/librustc/ty/cast.rs b/src/librustc/ty/cast.rs
index c0861abb774..ab82f28c8bf 100644
--- a/src/librustc/ty/cast.rs
+++ b/src/librustc/ty/cast.rs
@@ -58,6 +58,8 @@ pub enum CastKind {
 }
 
 impl<'tcx> CastTy<'tcx> {
+    /// Returns `Some` for integral/pointer casts.
+    /// casts like unsizing casts will return `None`
     pub fn from_ty(t: Ty<'tcx>) -> Option<CastTy<'tcx>> {
         match t.sty {
             ty::Bool => Some(CastTy::Int(IntTy::Bool)),
-- 
cgit 1.4.1-3-g733a5