servo/servo — pull request #4458 by pcwalton (2014-12-22 19:57:30+00:00)
Title: layout: Implement floated list items.

This patch also makes Servo not crash when
`generated_containing_block_rect()` is called on a list item (as, for
example, GitHub does), and for good measure I added the fix to other
flows as well.

r? @mbrubeck