From cb55ce11dc86c288f3d0e2b7ada3db9364997893 Mon Sep 17 00:00:00 2001
From: bjorn3 <17426603+bjorn3@users.noreply.github.com>
Date: Tue, 26 Sep 2023 16:52:08 +0000
Subject: [PATCH] Fix potential crash on large constant ZST slice

---
 src/constant.rs | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/src/constant.rs b/src/constant.rs
index 653c5b93573..1cb6fa07723 100644
--- a/src/constant.rs
+++ b/src/constant.rs
@@ -186,8 +186,7 @@ pub(crate) fn codegen_const_value<'tcx>(
         ConstValue::Slice { data, meta } => {
             let alloc_id = fx.tcx.reserve_and_set_memory_alloc(data);
             let ptr = pointer_for_allocation(fx, alloc_id).get_addr(fx);
-            // FIXME: the `try_from` here can actually fail, e.g. for very long ZST slices.
-            let len = fx.bcx.ins().iconst(fx.pointer_type, i64::try_from(meta).unwrap());
+            let len = fx.bcx.ins().iconst(fx.pointer_type, meta as i64);
             CValue::by_val_pair(ptr, len, layout)
         }
     }