From 0b3d2dac4405c9f0124dc24db128eb31f47c3113 Mon Sep 17 00:00:00 2001
From: Joe Wilm <joe@jwilm.com>
Date: Thu, 15 Dec 2016 09:09:49 -0800
Subject: [PATCH] Handle overflow in Term::move_backward

Resolves #25
---
 src/term/mod.rs | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/src/term/mod.rs b/src/term/mod.rs
index fb31af9b..93124732 100644
--- a/src/term/mod.rs
+++ b/src/term/mod.rs
@@ -557,7 +557,11 @@ impl ansi::Handler for Term {
     #[inline]
     fn move_backward(&mut self, cols: Column) {
         debug_println!("move_backward: {}", cols);
-        self.cursor.col -= cols;
+        if cols > self.cursor.col {
+            self.cursor.col = Column(0);
+        } else {
+            self.cursor.col -= cols;
+        }
     }
 
     #[inline]