[INFO] updating cached repository foreverbell/xv6fs
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/foreverbell/xv6fs
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/foreverbell/xv6fs" "work/ex/beta-1.38-1/sources/1.37.0/gh/foreverbell/xv6fs"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/1.37.0/gh/foreverbell/xv6fs'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/foreverbell/xv6fs" "work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/foreverbell/xv6fs"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/foreverbell/xv6fs'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 6949df5e3c794031f71d52b2b2b711d687b3ec52
[INFO] sha for GitHub repo foreverbell/xv6fs: 6949df5e3c794031f71d52b2b2b711d687b3ec52
[INFO] validating manifest of foreverbell/xv6fs on toolchain 1.37.0
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.37.0" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of foreverbell/xv6fs on toolchain beta-2019-08-13
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-08-13" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing foreverbell/xv6fs
[INFO] finished frobbing foreverbell/xv6fs
[INFO] frobbed toml for foreverbell/xv6fs written to work/ex/beta-1.38-1/sources/1.37.0/gh/foreverbell/xv6fs/Cargo.toml
[INFO] started frobbing foreverbell/xv6fs
[INFO] finished frobbing foreverbell/xv6fs
[INFO] frobbed toml for foreverbell/xv6fs written to work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/foreverbell/xv6fs/Cargo.toml
[INFO] crate foreverbell/xv6fs already has a lockfile, it will not be regenerated
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.37.0" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-08-13" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] testing foreverbell/xv6fs against beta-2019-08-13 for beta-1.38-1
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-3/beta-2019-08-13:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/foreverbell/xv6fs:/opt/crater/workdir:ro,Z" "-v" "/mnt/big/crater/work/local/cargo-home:/opt/crater/cargo-home:ro,Z" "-v" "/mnt/big/crater/work/local/rustup-home:/opt/crater/rustup-home:ro,Z" "-e" "USER_ID=1000" "-e" "SOURCE_DIR=/opt/crater/workdir" "-e" "MAP_USER_ID=1000" "-e" "CARGO_TARGET_DIR=/opt/crater/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/opt/crater/cargo-home" "-e" "RUSTUP_HOME=/opt/crater/rustup-home" "-w" "/opt/crater/workdir" "-m" "1536M" "--network" "none" "rustops/crates-build-env" "/opt/crater/cargo-home/bin/cargo" "+beta-2019-08-13" "build" "--frozen"`
[INFO] [stdout] 075aa9caa39c91eb419535617ae0289388708b8fb02acb0c0050ef5987bf6d11
[INFO] running `"docker" "start" "-a" "075aa9caa39c91eb419535617ae0289388708b8fb02acb0c0050ef5987bf6d11"`
[INFO] [stderr]    Compiling fuse v0.3.1
[INFO] [stderr]    Compiling threadpool v1.7.1
[INFO] [stderr]    Compiling xv6fs v0.1.0 (/opt/crater/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 '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: `#[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 '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] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `"docker" "inspect" "075aa9caa39c91eb419535617ae0289388708b8fb02acb0c0050ef5987bf6d11"`
[INFO] running `"docker" "rm" "-f" "075aa9caa39c91eb419535617ae0289388708b8fb02acb0c0050ef5987bf6d11"`
[INFO] [stdout] 075aa9caa39c91eb419535617ae0289388708b8fb02acb0c0050ef5987bf6d11