dart-lang/spark — pull request #2638 by ussuri (2014-06-19 04:26:35+00:00)
Title: Fixed NPE in Outline

TBR @umop

On rare occasions, Ace was triggering the sequence `scrollOffsetRangeIntoView` -> `offsetRange.centeredLower(_lastScrolledOffsetRange)` while `_lastScrolledOffsetRange` was still uninitialized. I'll file an issue for what those rare occasions are, but this induced problem needed to be fixed regardless.