Add lint to deny transmuting &T to &mut T#24392

Merged

bors merged 3 commits intorust-lang:masterfrom

seanmonstar:lint-transmute-mut

May 7, 2015

Commits on May 6, 2015

lint: deny transmuting from immutable to mutable, since it's undefined behavior
seanmonstar
committed
std: update select internals to not use mutable transmuting
seanmonstar
committed
test: update run-pass tests to not use mutable transmuting
seanmonstar
committed