auto merge of #6576 : nikomatsakis/rust/issue-5362-tuple-indices, r=graydon

r? @pcwalton

diff --cc src/librustc/middle/borrowck/check_loans.rs
Simple merge

diff --cc src/librustc/middle/borrowck/gather_loans/lifetime.rs
Simple merge

diff --cc src/librustc/middle/borrowck/gather_loans/restrictions.rs
Simple merge

diff --cc src/librustc/middle/borrowck/mod.rs
Simple merge