From f168adfc7fe741532b610dcfa04355436c7f330a Mon Sep 17 00:00:00 2001
From: Ralf Jung <post@ralfj.de>
Date: Sat, 1 Sep 2018 12:19:03 +0200
Subject: [PATCH] make sure we do not copy unsized data
---
src/librustc_mir/interpret/place.rs | 2 ++
1 file changed, 2 insertions(+)
diff --git a/src/librustc_mir/interpret/place.rs b/src/librustc_mir/interpret/place.rs
index 5bf6b2b46b7a6..6ee768fde5fa3 100644
--- a/src/librustc_mir/interpret/place.rs
+++ b/src/librustc_mir/interpret/place.rs
@@ -622,6 +622,8 @@ impl<'a, 'mir, 'tcx, M: Machine<'mir, 'tcx>> EvalContext<'a, 'mir, 'tcx, M> {
src: OpTy<'tcx>,
dest: PlaceTy<'tcx>,
) -> EvalResult<'tcx> {
+ assert!(!src.layout.is_unsized() && !dest.layout.is_unsized(),
+ "Cannot copy unsized data");
assert_eq!(src.layout.size, dest.layout.size,
"Size mismatch when copying!\nsrc: {:#?}\ndest: {:#?}", src, dest);