librustc: WIP for write barriers#4454

Closed

pcwalton wants to merge 2 commits intorust-lang:incomingfrom

pcwalton:inhtwama-wip

Commits on Jan 18, 2013

librustc: Disallow `&mut` loans from overlapping with any other loans
pcwalton
committed

Commits on Jan 22, 2013

librustc: Allow `&mut` to be loaned; allow `self` to be loaned; make `&mut` loanable to `&`.
pcwalton
committed