mozilla/rust — pull request #12753 by huonw (2014-03-07 10:47:19+00:00)
Title: std: stop `vec!()` warning about unused mutability.

If no arguments are given to `vec!` then no pushes are emitted and
so the compiler (rightly) complains that the mutability of `temp` is
never used.

This behaviour is rather annoying for users.