From 38552646f460e9a01925d57528621e40fd8e3b9b Mon Sep 17 00:00:00 2001
From: Roey Darwish Dror <roey.ghost@gmail.com>
Date: Wed, 30 Jan 2019 10:41:40 +0200
Subject: [PATCH] Fix potential integer overflow

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

diff --git a/src/terminal.rs b/src/terminal.rs
index ec78255a..1e9dca34 100644
--- a/src/terminal.rs
+++ b/src/terminal.rs
@@ -33,7 +33,13 @@ impl Terminal {
                             "\n―― {} {:―^border$}",
                             message,
                             "",
-                            border = max(2, min(80, width as usize) - 3 - message.len())
+                            border = max(
+                                2,
+                                min(80, width as usize)
+                                    .checked_sub(3)
+                                    .and_then(|e| e.checked_sub(message.len()))
+                                    .unwrap_or(0)
+                            )
                         ))
                         .bold()
                     ))