From e53641add1d67b9a9c1260203cd217f3bcfa449c Mon Sep 17 00:00:00 2001
From: Alex Ling <hkalexling@gmail.com>
Date: Tue, 9 Jun 2020 09:42:28 +0000
Subject: [PATCH] Handle the rare case when renamed string is ".."

---
 src/rename.cr | 12 ++++++++----
 1 file changed, 8 insertions(+), 4 deletions(-)

diff --git a/src/rename.cr b/src/rename.cr
index cd6af7b7..59fd6457 100644
--- a/src/rename.cr
+++ b/src/rename.cr
@@ -129,15 +129,19 @@ module Rename
     end
 
     def render(hash : VHash)
-      @ary.map do |e|
+      str = @ary.map do |e|
         if e.is_a? String
           e
         else
           e.render hash
         end
-      end.join
-        .strip
-        .gsub("/", "_")
+      end.join.strip
+      post_process str
+    end
+
+    private def post_process(str)
+      return "_" if str == ".."
+      str.gsub "/", "_"
     end
   end
 end