From c45643bb016c7b12ec43a041bd4d8bd8c66bc3b1 Mon Sep 17 00:00:00 2001
From: Kasey White <kwhitemsg@gmail.com>
Date: Fri, 23 Sep 2022 04:09:28 -0400
Subject: [PATCH] empty bytestring should return 0 not 1

---
 crates/uplc/src/machine.rs | 8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)

diff --git a/crates/uplc/src/machine.rs b/crates/uplc/src/machine.rs
index e03e12e1..f8a4fa87 100644
--- a/crates/uplc/src/machine.rs
+++ b/crates/uplc/src/machine.rs
@@ -457,7 +457,13 @@ impl Value {
                         ((i.abs() as f64).log2().floor() as i64 / 64) + 1
                     }
                 }
-                Constant::ByteString(b) => (((b.len() as i64 - 1) / 8) + 1),
+                Constant::ByteString(b) => {
+                    if b.is_empty() {
+                        0
+                    } else {
+                        ((b.len() as i64 - 1) / 8) + 1
+                    }
+                }
                 Constant::String(s) => s.chars().count() as i64,
                 Constant::Unit => 1,
                 Constant::Bool(_) => 1,