travis-ci/travis-worker — comment on commit 7b98a0fa83e937eca01e6d514c3da8a2d146dc13
File:  line 0
By michaelklishin:

The class isn't new but it did not have this condition and did not raise exceptions before. It is my only remaining question, why didn't it fail because of a nil pointer. However, we deployed this and 3 people who had this issue maybe every third or second time no longer have them. So anecdotal evidence suggest this change has effect.

After checking configuration everywhere I see that limit is set to a numerical value. A couple of other things to investigate next is whether or not String may use limit ivar for anything and how length is initialized.