部署到Heroku错误 . 给出日志

http://gentle-wildwood-7307.herokuapp.com/

应用程序从C9（mysql数据库，而不是postgresql）部署，这是我的日志 . 不确定是什么问题 .

4.236.208.24“dyno = connect = service = status = 503 bytes = 2014-11-16T17：41：31.091593 00:00 heroku [router]：at = error code = H10 desc =”App crashed“method = GET path = “/favicon.ico”host = gentle-wildwood-7307.herokuapp.com request_id = cc817f43-c067-47f5-b488-0e96f5207c2c fwd =“64.236.208.24”dyno = connect = service = status = 503 bytes = 2014-11- 16T17：41：31.891130 00:00 heroku [router]：at = error code = H10 desc =“App crashed”method = GET path =“/”host = gentle-wildwood-7307.herokuapp.com request_id = 1943dc6d-721a- 4761-a393-52b4816ef387 fwd =“64.236.208.24”dyno = connect = service = status = 503 bytes = 2014-11-16T17：41：32.045544 00:00 heroku [router]：at = error code = H10 desc =“App崩溃“method = GET path =”/ favicon.ico“host = gentle-wildwood-7307.herokuapp.com request_id = 963024c6-60e0-4540-896b-5de8d09c081b fwd =”64.236.208.24“dyno = connect = service = status = 503字节= 2014-11-16T17：41：32.351885 00:00 heroku [router]：at = error code = H10 desc =“App crashed”method = GET path =“/”host = gentle-wildwood-7307.herokuapp . com请求t_id = d594a1d8-379d-4d95-a54d-48eca9788237 fwd =“64.236.208.24”dyno = connect = service = status = 503 bytes = 2014-11-16T17：41：32.531014 00:00 heroku [router]：at = error code = H10 desc =“App crashed”method = GET path =“/ favicon.ico”host = gentle-wildwood-7307.herokuapp.com request_id = 848521cb-af78-4884-af8e-a62bf1624bab fwd =“64.236.208.24”dyno = connect = service = status = 503 bytes = 2014-11-16T17：43：44.753508 00:00 heroku [router]：at = error code = H10 desc =“App crashed”method = GET path =“/”host = gentle- wildwood-7307.herokuapp.com request_id = ab2215ad-aad7-479e-a9d5-a0db08791950 fwd =“64.236.208.24”dyno = connect = service = status = 503 bytes = 2014-11-16T17：43：44.910248 00:00 heroku [ router]：at = error code = H10 desc =“App crashed”method = GET path =“/ favicon.ico”host = gentle-wildwood-7307.herokuapp.com request_id = 79216544-8c50-4561-839a-be2cbb234a77 fwd = “64.236.208.24”dyno = connect = service = status = 503 bytes = 2014-11-16T17：44：12 00:00 heroku [slug-compiler]：Slug编译开始2014-11-16T17：44：20 00:00 Heroku的[slug-compiler]：Slug编译失败：编译Ruby应用程序失败2014-11-16T17：45：54.324695 00:00 heroku [router]：at = error code = H10 desc =“App crashed”method = GET path =“ /“host = gentle-wildwood-7307.herokuapp.com request_id = 6f5c17fd-5c75-482e-851e-b0e18291eb6d fwd =”64.236.208.24“dyno = connect = service = status = 503 bytes = 2014-11-16T17：45： 54.609157 00:00 heroku [router]：at = error code = H10 desc =“App crashed”method = GET path =“/ favicon.ico”host = gentle-wildwood-7307.herokuapp.com request_id = 312743fb-a8a1-4d72 -8ab6-d91a28cd3f27 fwd =“64.236.208.24”dyno = connect = service = status = 503 bytes = 2014-11-16T17：45：55.378930 00:00 heroku [router]：at = error code = H10 desc =“App崩溃“method = GET path =”/“host = gentle-wildwood-7307.herokuapp.com request_id = 24822512-b401-4281-9aa4-d7d0de596f22 fwd =”64.236.208.24“dyno = connect = service = status = 503 bytes = 2014 -11-16T17：45：55.720652 00:00 heroku [router]：at = error code = H10 desc =“App crashed”method = GET path =“/ favicon.ico”host = gentle-wildwood-7307.herokuapp .com request_id = cc8e0da3-ccf9-4389-9b2d-7ccf1bdc7e85 fwd =“64.236.208.24”dyno = connect = service = status = 503 bytes = 2014-11-16T17：46：26.595187 00:00 heroku [api]：启动过程with command bundle exec rake db：migrate by sportsdude.reese@gmail.com 2014-11-16T17：46：30.757912 00:00 heroku [run.5329]：等待客户端2014-11-16T17：46：30.806568 00:00 heroku [run.5329]：使用命令bundle exec rake db：migrate启动进程2014-11-16T17：46：30.994709 00:00 heroku [run.5329]：状态从开始变为up 2014-11-16T17：46：35.021047 00:00 heroku [run.5329]：进程退出状态1 2014-11-16T17：46：35.027007 00:00 heroku [run.5329]：状态由完全变为完成2014-11-16T17：47：43 00 ：00 heroku [slug-compiler]：Slug编译开始2014-11-16T17：47：54 00:00 heroku [slug-compiler]：Slug编译失败：编译Ruby app失败