From e938b62f571c82044fe3aaea05acaf47a7ddf22c Mon Sep 17 00:00:00 2001
From: Rob Hoelz <rob@hoelz.ro>
Date: Mon, 18 Aug 2014 20:05:02 -0500
Subject: [PATCH] Fix infinite loop issue

This addresses GH #481
---
 ack | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/ack b/ack
index c2694462..0c7316aa 100644
--- a/ack
+++ b/ack
@@ -177,6 +177,12 @@ sub _compile_file_filter {
     my $is_inverted     = $opt->{v};
 
     return sub {
+        if ( -f STDOUT ) {
+            my ( $target_dev, $target_inode ) = stat($File::Next::name);
+            my ( $output_dev, $output_inode ) = stat(STDOUT);
+
+            return if $target_dev == $output_dev && $target_inode == $output_inode;
+        }
         if ( $match_filenames ) {
             if ( $File::Next::name =~ /$match_regex/ && $is_inverted ) {
                 return;