ruby / mysql mysql_adapter.rb：505：在'real_connect'中：无法将String转换为Integer

I came in this morning, fired up my app in the same way as usual, and started getting this error. Since then, I have been down every road I can conceive - to the point of removing and reinstalling every piece of ruby/rails software on my machine, including mysql. I have stripped my application down to just the following.I came in this morning, fired up my app in the