From 576f3726d0b200ad0a23106c2e15436638d02d09 Mon Sep 17 00:00:00 2001
From: Nobuyoshi Nakada <nobu@ruby-lang.org>
Date: Sat, 24 May 2014 13:42:08 +0900
Subject: [PATCH] The input may not end with a newline always

---
 envchain.c | 7 +++----
 1 file changed, 3 insertions(+), 4 deletions(-)

diff --git a/envchain.c b/envchain.c
index 2c10c51..f557577 100644
--- a/envchain.c
+++ b/envchain.c
@@ -425,10 +425,9 @@ envchain_noecho_read(char* prompt)
     exit(10);
   }
 
-  if (len == 0)
-    str[0] = '\0';
-  else
-    str[len - 1] = '\0';
+  if (len > 0 && str[len - 1] == '\n')
+    --len;
+  str[len] = '\0';
 
   printf("\n");