From a8e0781ec579ad8ed4fef875739c1a7a482b7402 Mon Sep 17 00:00:00 2001
From: Alex Gorbatchev <alex.gorbatchev@gmail.com>
Date: Wed, 1 Jun 2016 10:18:48 -0700
Subject: [PATCH] Fixes Node.js compilers writing to STDOUT and/or STDERR
 during compilation

---
 lib/execjs/support/node_runner.js |  9 +++++++++
 test/test_execjs.rb               | 16 ++++++++++++++++
 2 files changed, 25 insertions(+)

diff --git a/lib/execjs/support/node_runner.js b/lib/execjs/support/node_runner.js
index ab0c6ec..d3e3551 100644
--- a/lib/execjs/support/node_runner.js
+++ b/lib/execjs/support/node_runner.js
@@ -4,7 +4,16 @@
     process.stdout.write('' + string);
   };
   try {
+    var stdoutWrite = process.stdout.write;
+    var stderrWrite = process.stderr.write;
+
+    process.stdout.write = process.stderr.write = function () {}
+
     result = program();
+
+    process.stdout.write = stdoutWrite;
+    process.stderr.write = stderrWrite;
+
     if (typeof result == 'undefined' && result !== null) {
       print('["ok"]');
     } else {
diff --git a/test/test_execjs.rb b/test/test_execjs.rb
index 7fd967f..562de9c 100644
--- a/test/test_execjs.rb
+++ b/test/test_execjs.rb
@@ -376,4 +376,20 @@ def test_uglify
     assert_equal "function foo(bar){return bar}",
       context.call("uglify", "function foo(bar) {\n  return bar;\n}")
   end
+
+  def test_node_runtime_with_compiler_writing_to_stdio
+    skip if not ExecJS.runtime.name =~ /Node/
+
+    source = <<-JS
+      process.stdout.write('WARNING');
+      process.stderr.write('ERROR');
+
+      function compile(code) {
+        return code;
+      }
+    JS
+
+    context = ExecJS.compile(source)
+    assert_equal "foo()", context.call("compile", "foo()")
+  end
 end