test-http-outgoing-proto throws: TypeError: can't convert undefined to object

[mykmelez]

=== release test-http-outgoing-proto ===
Path: parallel/test-http-outgoing-proto
JS error at _http_outgoing.js:706: TypeError: can't convert undefined to object
_http_outgoing.js:706

TypeError: can't convert undefined to object
at addTrailers (_http_outgoing.js:706:14)
at /Users/myk/Projects/spidernode/test/parallel/test-http-outgoing-proto.js:64:3
at _tryBlock (assert.js:383:5)
at _throws (assert.js:402:12)
at throws (assert.js:432:3)
at /Users/myk/Projects/spidernode/test/parallel/test-http-outgoing-proto.js:62:1
at Module.prototype._compile (module.js:585:16)
at Module._extensions[".js"] (module.js:595:3)
at Module.prototype.load (module.js:503:3)
at tryModuleLoad (module.js:466:5)
at Module._load (module.js:458:3)
at Module.runMain (module.js:620:3)
at run (bootstrap_node.js:437:7)
at startup (bootstrap_node.js:147:9)
at bootstrap_node.js:552:3
Command: out/Release/node /Users/myk/Projects/spidernode/test/parallel/test-http-outgoing-proto.js