cargo build fails on Ubuntu 18.04

[Kuree]

error[E0658]: non-reference pattern used to match a reference (see issue #42640)
   --> src/gcsf/file_manager.rs:275:13
    |
275 |             FileId::Inode(inode) => self.node_ids.contains_key(&inode),
    |             ^^^^^^^^^^^^^^^^^^^^ help: consider using a reference: `&FileId::Inode(inode)`

error[E0658]: non-reference pattern used to match a reference (see issue #42640)
   --> src/gcsf/file_manager.rs:276:13
    |
276 |             FileId::DriveId(drive_id) => self.drive_ids.contains_key(drive_id),
    |             ^^^^^^^^^^^^^^^^^^^^^^^^^ help: consider using a reference: `&FileId::DriveId(drive_id)`

Toolchain installed:

$ rustc --version
rustc 1.25.0 (84203cac6 2018-03-25)
$ cargo --version
cargo 0.26.0 (41480f5cc 2018-02-26)

[harababurel]

The errors are caused by a feature introduced in Rust 1.26 (see heading "Nicer match bindings" in this blog post).

They should be fixed after upgrading Rust to the latest version:

$ rustup update stable

[Kuree]

Thanks!