longStackTrace (Yaku vs Bluebird)

Promise_Yaku = require '../src/yaku'
Promise_Bird = require 'bluebird'

Promise_Yaku.enableLongStackTrace()
Promise_Bird.longStackTraces()

test = (Promise) ->
    Promise.resolve()
    .then ->
        a()
    .then -> null

test Promise_Yaku
test Promise_Bird

trace - Bluebird

Unhandled rejection ReferenceError: a is not defined
  at /Users/ys/cradle/yaku/test/lab.coffee:10:9
  at processImmediate [as _immediateCallback] (timers.js:368:17)
From previous event:
  at test (/Users/ys/cradle/yaku/test/lab.coffee:9:6)
  at Object.<anonymous> (/Users/ys/cradle/yaku/test/lab.coffee:14:1)
  at Object.<anonymous> (/Users/ys/cradle/yaku/test/lab.coffee:1:1)
  at Module._compile (module.js:428:26)
  at Object.exports.run (/Users/ys/cradle/yaku/node_modules/coffee-script/lib/coffee-script/coffee-script.js:131:23)
  at compileScript (/Users/ys/cradle/yaku/node_modules/coffee-script/lib/coffee-script/command.js:224:29)
  at compilePath (/Users/ys/cradle/yaku/node_modules/coffee-script/lib/coffee-script/command.js:174:14)
  at Object.exports.run (/Users/ys/cradle/yaku/node_modules/coffee-script/lib/coffee-script/command.js:98:20)
  at Object.<anonymous> (/Users/ys/cradle/yaku/node_modules/coffee-script/bin/coffee:7:41)
  at Module._compile (module.js:428:26)
  at Object.Module._extensions..js (module.js:446:10)
  at Module.load (module.js:353:32)
  at Function.Module._load (module.js:308:12)
  at Function.Module.runMain (module.js:469:10)
  at startup (node.js:124:18)
  at node.js:882:3

trace - Yaku

Unhandled Rejection: ReferenceError: a is not defined
  at /Users/ys/cradle/yaku/test/lab.coffee:10:9
  at process._tickCallback (node.js:341:15)
  at Function.Module.runMain (module.js:471:11)
  at startup (node.js:124:18)
  at node.js:882:3
 
From previous event:
  at test (/Users/ys/cradle/yaku/test/lab.coffee:9:6)
  at Object.<anonymous> (/Users/ys/cradle/yaku/test/lab.coffee:13:1)
  at Object.<anonymous> (/Users/ys/cradle/yaku/test/lab.coffee:1:1)
  at Module._compile (module.js:428:26)
  at Object.exports.run (/Users/ys/cradle/yaku/node_modules/coffee-script/lib/coffee-script/coffee-script.js:131:23)
  at compileScript (/Users/ys/cradle/yaku/node_modules/coffee-script/lib/coffee-script/command.js:224:29)
  at compilePath (/Users/ys/cradle/yaku/node_modules/coffee-script/lib/coffee-script/command.js:174:14)
  at Object.exports.run (/Users/ys/cradle/yaku/node_modules/coffee-script/lib/coffee-script/command.js:98:20)
  at Object.<anonymous> (/Users/ys/cradle/yaku/node_modules/coffee-script/bin/coffee:7:41)
  at Module._compile (module.js:428:26)
  at Object.Module._extensions..js (module.js:446:10)
  at Module.load (module.js:353:32)
  at Function.Module._load (module.js:308:12)
  at Function.Module.runMain (module.js:469:10)
  at startup (node.js:124:18)
  at node.js:882:3
From previous event:
  at test (/Users/ys/cradle/yaku/test/lab.coffee:8:13)
  at Object.<anonymous> (/Users/ys/cradle/yaku/test/lab.coffee:13:1)
  at Object.<anonymous> (/Users/ys/cradle/yaku/test/lab.coffee:1:1)
  at Module._compile (module.js:428:26)
  at Object.exports.run (/Users/ys/cradle/yaku/node_modules/coffee-script/lib/coffee-script/coffee-script.js:131:23)
  at compileScript (/Users/ys/cradle/yaku/node_modules/coffee-script/lib/coffee-script/command.js:224:29)
  at compilePath (/Users/ys/cradle/yaku/node_modules/coffee-script/lib/coffee-script/command.js:174:14)
  at Object.exports.run (/Users/ys/cradle/yaku/node_modules/coffee-script/lib/coffee-script/command.js:98:20)
  at Object.<anonymous> (/Users/ys/cradle/yaku/node_modules/coffee-script/bin/coffee:7:41)
  at Module._compile (module.js:428:26)
  at Object.Module._extensions..js (module.js:446:10)
  at Module.load (module.js:353:32)
  at Function.Module._load (module.js:308:12)
  at Function.Module.runMain (module.js:469:10)
  at startup (node.js:124:18)
  at node.js:882:3