[INFO] updating cached repository https://github.com/foreverbell/xv6fs
[INFO] running `"git" "-c" "credential.helper=" "-c" "credential.helper=/big/crater/work/cargo-home/bin/git-credential-null" "-c" "remote.origin.fetch=refs/heads/*:refs/heads/*" "fetch" "origin" "--force" "--prune"`
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 6949df5e3c794031f71d52b2b2b711d687b3ec52
[INFO] testing foreverbell/xv6fs against beta-2019-09-28 for beta-1.39-1
[INFO] running `"git" "clone" "work/cache/git-repos/https%3A%2F%2Fgithub.com%2Fforeverbell%2Fxv6fs" "work/builds/worker-2/source"`
[INFO] [stderr] Cloning into 'work/builds/worker-2/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/foreverbell/xv6fs on toolchain beta-2019-09-28
[INFO] running `"/big/crater/work/cargo-home/bin/cargo" "+beta-2019-09-28" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking git repo https://github.com/foreverbell/xv6fs
[INFO] finished tweaking git repo https://github.com/foreverbell/xv6fs
[INFO] tweaked toml for git repo https://github.com/foreverbell/xv6fs written to work/builds/worker-2/source/Cargo.toml
[INFO] crate git repo https://github.com/foreverbell/xv6fs already has a lockfile, it will not be regenerated
[INFO] running `"/big/crater/work/cargo-home/bin/cargo" "+beta-2019-09-28" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"docker" "create" "-v" "/big/crater/work/builds/worker-2/target:/opt/rustwide/target:rw,Z" "-v" "/big/crater/work/builds/worker-2/source:/opt/rustwide/workdir:ro,Z" "-v" "/big/crater/work/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/big/crater/work/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "MAP_USER_ID=1000" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--network" "none" "rustops/crates-build-env" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2019-09-28" "build" "--frozen"`
[INFO] [stdout] 782b69f0ed9fdb2dbb2822aad3dcc0164008428288983b434e3cafd7501bf607
[INFO] running `"docker" "start" "-a" "782b69f0ed9fdb2dbb2822aad3dcc0164008428288983b434e3cafd7501bf607"`
[INFO] [stderr]    Compiling fuse v0.3.1
[INFO] [stderr]    Compiling threadpool v1.7.1
[INFO] [stderr]    Compiling regex v1.0.0
[INFO] [stderr]    Compiling env_logger v0.5.10
[INFO] [stderr]    Compiling xv6fs v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stderr]  --> src/lib.rs:1:1
[INFO] [stderr]   |
[INFO] [stderr] 1 | #![feature(specialization)]
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]   --> src/buffer.rs:7:1
[INFO] [stderr]    |
[INFO] [stderr] 7  | / bitflags! {
[INFO] [stderr] 8  | |   struct BufFlags: u32 {
[INFO] [stderr] 9  | |     const VALID = 0b01;
[INFO] [stderr] 10 | |     const DIRTY = 0b10;
[INFO] [stderr] 11 | |   }
[INFO] [stderr] 12 | | }
[INFO] [stderr]    | |_^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(deprecated)]` on by default
[INFO] [stderr]    = note: this warning originates in a macro outside of the current crate (in Nightly builds, run with -Z external-macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]   --> src/buffer.rs:7:1
[INFO] [stderr]    |
[INFO] [stderr] 7  | / bitflags! {
[INFO] [stderr] 8  | |   struct BufFlags: u32 {
[INFO] [stderr] 9  | |     const VALID = 0b01;
[INFO] [stderr] 10 | |     const DIRTY = 0b10;
[INFO] [stderr] 11 | |   }
[INFO] [stderr] 12 | | }
[INFO] [stderr]    | |_^
[INFO] [stderr]    |
[INFO] [stderr]    = note: this warning originates in a macro outside of the current crate (in Nightly builds, run with -Z external-macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]   --> src/buffer.rs:7:1
[INFO] [stderr]    |
[INFO] [stderr] 7  | / bitflags! {
[INFO] [stderr] 8  | |   struct BufFlags: u32 {
[INFO] [stderr] 9  | |     const VALID = 0b01;
[INFO] [stderr] 10 | |     const DIRTY = 0b10;
[INFO] [stderr] 11 | |   }
[INFO] [stderr] 12 | | }
[INFO] [stderr]    | |_^
[INFO] [stderr]    |
[INFO] [stderr]    = note: this warning originates in a macro outside of the current crate (in Nightly builds, run with -Z external-macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'std::sync::ONCE_INIT': the `new` function is now preferred
[INFO] [stderr]   --> src/disk.rs:33:1
[INFO] [stderr]    |
[INFO] [stderr] 33 | / lazy_static! {
[INFO] [stderr] 34 | |   pub static ref DISK: DiskService = DiskService {
[INFO] [stderr] 35 | |     channel: Mutex::new(None)
[INFO] [stderr] 36 | |   };
[INFO] [stderr] 37 | | }
[INFO] [stderr]    | |_^
[INFO] [stderr]    |
[INFO] [stderr]    = note: this warning originates in a macro outside of the current crate (in Nightly builds, run with -Z external-macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'std::sync::ONCE_INIT': the `new` function is now preferred
[INFO] [stderr]   --> src/inode.rs:44:1
[INFO] [stderr]    |
[INFO] [stderr] 44 | / lazy_static! {
[INFO] [stderr] 45 | |   pub static ref ICACHE: Cache = Cache::new(256);
[INFO] [stderr] 46 | | }
[INFO] [stderr]    | |_^
[INFO] [stderr]    |
[INFO] [stderr]    = note: this warning originates in a macro outside of the current crate (in Nightly builds, run with -Z external-macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'std::sync::ONCE_INIT': the `new` function is now preferred
[INFO] [stderr]   --> src/logging.rs:36:1
[INFO] [stderr]    |
[INFO] [stderr] 36 | / lazy_static! {
[INFO] [stderr] 37 | |   pub static ref LOGGING: Logging = Logging::new();
[INFO] [stderr] 38 | | }
[INFO] [stderr]    | |_^
[INFO] [stderr]    |
[INFO] [stderr]    = note: this warning originates in a macro outside of the current crate (in Nightly builds, run with -Z external-macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'std::sync::ONCE_INIT': the `new` function is now preferred
[INFO] [stderr]   --> src/buffer.rs:27:1
[INFO] [stderr]    |
[INFO] [stderr] 27 | / lazy_static! {
[INFO] [stderr] 28 | |   pub static ref BCACHE: Cache = Cache::new(256);
[INFO] [stderr] 29 | |
[INFO] [stderr] 30 | |   // Block 1 is immutable after file system is created, so we can safely
[INFO] [stderr] ...  |
[INFO] [stderr] 34 | |   );
[INFO] [stderr] 35 | | }
[INFO] [stderr]    | |_^
[INFO] [stderr]    |
[INFO] [stderr]    = note: this warning originates in a macro outside of the current crate (in Nightly builds, run with -Z external-macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'std::sync::ONCE_INIT': the `new` function is now preferred
[INFO] [stderr]   --> src/buffer.rs:27:1
[INFO] [stderr]    |
[INFO] [stderr] 27 | / lazy_static! {
[INFO] [stderr] 28 | |   pub static ref BCACHE: Cache = Cache::new(256);
[INFO] [stderr] 29 | |
[INFO] [stderr] 30 | |   // Block 1 is immutable after file system is created, so we can safely
[INFO] [stderr] ...  |
[INFO] [stderr] 34 | |   );
[INFO] [stderr] 35 | | }
[INFO] [stderr]    | |_^
[INFO] [stderr]    |
[INFO] [stderr]    = note: this warning originates in a macro outside of the current crate (in Nightly builds, run with -Z external-macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to previous error
[INFO] [stderr] 
[INFO] [stderr] For more information about this error, try `rustc --explain E0554`.
[INFO] [stderr] error: could not compile `xv6fs`.
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: build failed
[INFO] running `"docker" "inspect" "782b69f0ed9fdb2dbb2822aad3dcc0164008428288983b434e3cafd7501bf607"`
[INFO] running `"docker" "rm" "-f" "782b69f0ed9fdb2dbb2822aad3dcc0164008428288983b434e3cafd7501bf607"`
[INFO] [stdout] 782b69f0ed9fdb2dbb2822aad3dcc0164008428288983b434e3cafd7501bf607