Running Meteor 1.4.2.1 on Ubuntu 16.04. Before the update, the source view in Chrome Developer Tools display all .coffee files properly. After updating to version 1.4.2.1, I can see all .scss, and .js ok, but the .coffee files show only blank screen. I was able to see the console.log outputs, but clicking on their links will just open blank .coffee files.
I suspect that the source map for compiled .coffee files are causing this issue, or am I missing some steps in upgrading to this version?
I am seeing this issue as well. I haven’t filed a GitHub issue yet because I wasn’t able to reproduce this on an empty project. On the plus side it has given me motivation to convert more of my code over to ES6 
it’s a bad idea, because we have a big project.
Agree. It’s not feasible to convert an entire project written in coffeescript to ES6. Since nobody has came up with a solution to this issue, so I’m stuck at using older Meteor version.
Thanks. It seems a fix is submitted. How do I know when I can get a new version?
To fix this issue, pick up latest coffeescript package version 1.12.3.1 by upgrading to Meteor version 1.4.2.7