Ruby on rails heroku run rake db:migrate失败，返回“0”；无法加载这样的文件--调试器"；

我在尝试迁移数据库时遇到了一个奇怪的错误。有人知道发生了什么事吗

在我的任何迁移中都没有

require debugger

调用。不过，我在另一个rake任务中也有一些，这不是迁移。这可能就是问题所在吗

me$ heroku run rake db:migrate --trace


Running `rake db:migrate --trace` attached to terminal... up, run.2463
rake aborted!
cannot load such file -- debugger
/app/vendor/bundle/ruby/2.1.0/gems/activesupport-4.0.0/lib/active_support/dependencies.rb:228:in `require'
/app/vendor/bundle/ruby/2.1.0/gems/activesupport-4.0.0/lib/active_support/dependencies.rb:228:in `block in require'
/app/vendor/bundle/ruby/2.1.0/gems/activesupport-4.0.0/lib/active_support/dependencies.rb:213:in `load_dependency'
/app/vendor/bundle/ruby/2.1.0/gems/activesupport-4.0.0/lib/active_support/dependencies.rb:228:in `require'
/app/lib/tasks/misc.rake:6:in `<top (required)>'
/app/vendor/bundle/ruby/2.1.0/gems/activesupport-4.0.0/lib/active_support/dependencies.rb:222:in `load'
/app/vendor/bundle/ruby/2.1.0/gems/activesupport-4.0.0/lib/active_support/dependencies.rb:222:in `block in load'
/app/vendor/bundle/ruby/2.1.0/gems/activesupport-4.0.0/lib/active_support/dependencies.rb:213:in `load_dependency'
/app/vendor/bundle/ruby/2.1.0/gems/activesupport-4.0.0/lib/active_support/dependencies.rb:222:in `load'
/app/vendor/bundle/ruby/2.1.0/gems/railties-4.0.0/lib/rails/engine.rb:641:in `block in run_tasks_blocks'
/app/vendor/bundle/ruby/2.1.0/gems/railties-4.0.0/lib/rails/engine.rb:641:in `each'
/app/vendor/bundle/ruby/2.1.0/gems/railties-4.0.0/lib/rails/engine.rb:641:in `run_tasks_blocks'
/app/vendor/bundle/ruby/2.1.0/gems/railties-4.0.0/lib/rails/application.rb:244:in `run_tasks_blocks'
/app/vendor/bundle/ruby/2.1.0/gems/railties-4.0.0/lib/rails/engine.rb:446:in `load_tasks'
/app/vendor/bundle/ruby/2.1.0/gems/railties-4.0.0/lib/rails/railtie/configurable.rb:30:in `method_missing'
/app/Rakefile:6:in `<top (required)>'
/app/vendor/ruby-2.1.0/lib/ruby/2.1.0/rake/rake_module.rb:25:in `load'
/app/vendor/ruby-2.1.0/lib/ruby/2.1.0/rake/rake_module.rb:25:in `load_rakefile'
/app/vendor/ruby-2.1.0/lib/ruby/2.1.0/rake/application.rb:637:in `raw_load_rakefile'
/app/vendor/ruby-2.1.0/lib/ruby/2.1.0/rake/application.rb:94:in `block in load_rakefile'
/app/vendor/ruby-2.1.0/lib/ruby/2.1.0/rake/application.rb:165:in `standard_exception_handling'
/app/vendor/ruby-2.1.0/lib/ruby/2.1.0/rake/application.rb:93:in `load_rakefile'
/app/vendor/ruby-2.1.0/lib/ruby/2.1.0/rake/application.rb:77:in `block in run'
/app/vendor/ruby-2.1.0/lib/ruby/2.1.0/rake/application.rb:165:in `standard_exception_handling'
/app/vendor/ruby-2.1.0/lib/ruby/2.1.0/rake/application.rb:75:in `run'
/app/bin/rake:4:in `<main>'

me$heroku运行rake db:migrate--trace
正在运行附加到终端的“rake db:migrate--trace”。。。起来，跑
雷克流产了！
无法加载这样的文件--调试器
/app/vendor/bundle/ruby/2.1.0/gems/activesupport-4.0.0/lib/active\u support/dependencies.rb:228:in'require'
/app/vendor/bundle/ruby/2.1.0/gems/activesupport-4.0.0/lib/active\u support/dependencies.rb:228:in'block in require'
/app/vendor/bundle/ruby/2.1.0/gems/activesupport-4.0.0/lib/active\u support/dependencies.rb:213:in'load\u dependencity'
/app/vendor/bundle/ruby/2.1.0/gems/activesupport-4.0.0/lib/active\u support/dependencies.rb:228:in'require'
/app/lib/tasks/misc.rake:6:in`'
/app/vendor/bundle/ruby/2.1.0/gems/activesupport-4.0.0/lib/active\u support/dependencies.rb:222:in'load'
/app/vendor/bundle/ruby/2.1.0/gems/activesupport-4.0.0/lib/active\u support/dependencies.rb:222:in'block in load'
/app/vendor/bundle/ruby/2.1.0/gems/activesupport-4.0.0/lib/active\u support/dependencies.rb:213:in'load\u dependencity'
/app/vendor/bundle/ruby/2.1.0/gems/activesupport-4.0.0/lib/active\u support/dependencies.rb:222:in'load'
/app/vendor/bundle/ruby/2.1.0/gems/railties-4.0.0/lib/rails/engine.rb:641:in'block in run\u tasks\u blocks'
/app/vendor/bundle/ruby/2.1.0/gems/railties-4.0.0/lib/rails/engine.rb:641:in'each'
/app/vendor/bundle/ruby/2.1.0/gems/railties-4.0.0/lib/rails/engine.rb:641:在“运行任务块”中
/app/vendor/bundle/ruby/2.1.0/gems/railties-4.0.0/lib/rails/application.rb:244:在“运行任务块”中
/app/vendor/bundle/ruby/2.1.0/gems/railties-4.0.0/lib/rails/engine.rb:446:in'load_tasks'
/app/vendor/bundle/ruby/2.1.0/gems/railties-4.0.0/lib/rails/railtie/configurable.rb:30:in'method_missing'
/app/Rakefile:6:in`'
/app/vendor/ruby-2.1.0/lib/ruby/2.1.0/rake/rake_module.rb:25:in'load'
/app/vendor/ruby-2.1.0/lib/ruby/2.1.0/rake/rake_module.rb:25:in'load_rakefile'
/app/vendor/ruby-2.1.0/lib/ruby/2.1.0/rake/application.rb:637:in'raw\u load\u rakefile'
/app/vendor/ruby-2.1.0/lib/ruby/2.1.0/rake/application.rb:94:in'block in load_rakefile'
/app/vendor/ruby-2.1.0/lib/ruby/2.1.0/rake/application.rb:165:在“标准异常处理”中
/app/vendor/ruby-2.1.0/lib/ruby/2.1.0/rake/application.rb:93:in'load_rakefile'
/app/vendor/ruby-2.1.0/lib/ruby/2.1.0/rake/application.rb:77:in'block in run'
/app/vendor/ruby-2.1.0/lib/ruby/2.1.0/rake/application.rb:165:在“标准异常处理”中
/app/vendor/ruby-2.1.0/lib/ruby/2.1.0/rake/application.rb:75:in'run'
/app/bin/rake:4:in`'

啊，好的。我明白了。我的另一个rake任务的根作用域中有

require debugger

。这就是把heroku甩出去的原因。问题解决了