From 0ef664e93d0db38260d3e13f22563b902c5f969c Mon Sep 17 00:00:00 2001
From: Joshua Peek <josh@joshpeek.com>
Date: Tue, 23 Dec 2014 00:22:53 -0600
Subject: [PATCH] Always redirect stderr in jruby

---
 lib/execjs/external_runtime.rb | 15 +++++++++++++++
 1 file changed, 15 insertions(+)

diff --git a/lib/execjs/external_runtime.rb b/lib/execjs/external_runtime.rb
index f123cfe..bd51eae 100644
--- a/lib/execjs/external_runtime.rb
+++ b/lib/execjs/external_runtime.rb
@@ -169,6 +169,21 @@ module ExecJS
             arg
           }.join(" ")
         end
+      elsif RUBY_ENGINE == 'jruby'
+        require 'shellwords'
+
+        def exec_runtime(filename)
+          command = "#{Shellwords.join(binary.split(' ') << filename)} 2>&1"
+          io = IO.popen(command, @popen_options)
+          output = io.read
+          io.close
+
+          if $?.success?
+            output
+          else
+            raise RuntimeError, output
+          end
+        end
       else
         def exec_runtime(filename)
           io = IO.popen(binary.split(' ') << filename, @popen_options.merge({err: [:child, :out]}))