Why Rails fails with: ruby.exe has encountered a problem and needs to close. We are sorry for the inconvenience

I run a Rails 3 application on Windo开发者_如何学Pythonws XP and it fails sometimes with the following error:

This causes the WEBrick server to shutdown.

When I start the server again, sometimes the page loads as expected and sometimes it fails again with the same error.

I noticed that the error appears when I change one of the JavaScript files that belong to the loaded page.

What could be the reason for this ?

How could I debug this ?

My Ruby version is: ruby 1.9.2p0 (2010-08-18) [i386-mingw32].

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You need to check if your 1.9 minor version is stable. There have been some issues with unstable minor 1.9 versions of language before...