From c31819b3ff35be5bdec58cba9515578fbff0a5b8 Mon Sep 17 00:00:00 2001
From: Ralf Jung <post@ralfj.de>
Date: Wed, 17 Oct 2018 09:24:43 +0200
Subject: [PATCH] layout should not affect CTFE checks (outside of validation)

---
 src/librustc_mir/interpret/operand.rs | 3 ---
 1 file changed, 3 deletions(-)

diff --git a/src/librustc_mir/interpret/operand.rs b/src/librustc_mir/interpret/operand.rs
index c72a5894b6ac7..2d6b19ca4a7fc 100644
--- a/src/librustc_mir/interpret/operand.rs
+++ b/src/librustc_mir/interpret/operand.rs
@@ -688,9 +688,6 @@ impl<'a, 'mir, 'tcx, M: Machine<'a, 'mir, 'tcx>> EvalContext<'a, 'mir, 'tcx, M>
         rval: OpTy<'tcx, M::PointerTag>,
     ) -> EvalResult<'tcx, (u128, usize)> {
         trace!("read_discriminant_value {:#?}", rval.layout);
-        if rval.layout.abi.is_uninhabited() {
-            return err!(Unreachable);
-        }
 
         match rval.layout.variants {
             layout::Variants::Single { index } => {