Refactor how we handle overflow and remove blanket Pattern impl#23580

Merged

bors merged 2 commits intorust-lang:masterfrom nikomatsakis:pattern-and-overflow

Mar 24, 2015

+88-104

Commits on Mar 23, 2015

Refactor how we handle overflow so that it is a fatal error that aborts
nikomatsakis
committed
Remove auto-deref'ing Pattern impl because it conflicts with other
nikomatsakis
committed