rust-lang/rust — pull request #17934 by pcwalton (2014-10-10 22:20:52+00:00)
Title: librustc: Improve method autoderef/deref/index behavior more, and enable

`IndexMut` on mutable vectors.

This fixes a bug whereby the mutability fixups for method behavior were
not kicking in after autoderef failed to happen at any level. It also
adds support for `Index` to the fixer-upper.

Closes #12825.

r? @pnkfelix