From f109d535b1fdc50c21e90aff05fef6e5f6950952 Mon Sep 17 00:00:00 2001
From: ridiculousfish <corydoras@ridiculousfish.com>
Date: Thu, 21 Feb 2013 12:44:01 -0800
Subject: [PATCH] Add a null check to avoid passing null to
 io_chain_t::push_back https://github.com/fish-shell/fish-shell/issues/590

---
 parser.cpp | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/parser.cpp b/parser.cpp
index b592ed9bf..529550d79 100644
--- a/parser.cpp
+++ b/parser.cpp
@@ -1560,8 +1560,10 @@ void parser_t::parse_job_argument_list(process_t *p,
                         new_io.reset(new_io_file);
                     }
                 }
-
-                j->io.push_back(new_io);
+                
+                if (new_io.get() != NULL) {
+                    j->io.push_back(new_io);
+                }
 
             }
             break;