fix "Cannot read property text of undefined"

[levity]

This is similar to #9 but it's a bit cleaner and addresses one more place where the error can occur.

[yahoocla]

CLA is valid!

[MinweiShen]

Solves my problem!

[dennybiasiolli]

Works for me too

[bcoe]

@levity sorry for the slow turnaround on this, mind rebasing and I'll get it shipped ASAP?

[bcoe]

@levity @dennybiasiolli @MinweiShen this will be shipped in the next release of nyc, I would love the extra help testing (as there are a few big features going out in this release as well).

npm cache clear; npm i nyc@next

[satyendra-singh]

nothing is wrong with node module.
I also had same problem and googled all the day to figure this out... finally I found special characters in my code -- it was <U+2028>
that was causing problem
istanbul go through entire code for coverage.
I removed all special character and ran test cases again.
every thing works fine.

[bcoe]

@satyendra-singh this is an interesting bug! if it's reproducable, perhaps you could open a separate ticket and we can dig into it?

[glazar]

@levity We should also port these changes to https://github.com/gotwarlost/istanbul/blob/master/lib/report/html.js.
I ran into a similar issue with a setup involving the above mentioned file, and the fix is not yet to be found there. I can create a PR for that one.