fix for Cannot call method 'getTime' of null

[zygis]

Fixed this error, when I had some unfinished jobs due errors in filesystem
/opt/node-0.10.21/lib/node_modules/strider/node_modules/mongoose/lib/utils.js:419
throw err;
^
TypeError: Cannot call method 'getTime' of null
at Promise. (/opt/node-0.10.21/lib/node_modules/strider/lib/backchannel.js:158:61)

[jaredly]

thanks! I've been seeing these errors too. I'll accept it as a stop-gap until we figure out the real problem.

[niallo]

Thanks. Yes, I've seen this too. In my case, the underlying problem was the worker being unable to access a writeable directory for its checkout. This was due to $HOME not being writeable (since $HOME/.strider is the default data dir).

It would be nice to catch those errors higher in the stack and log them in a nice way.