[INFO] cloning repository https://github.com/foreverbell/xv6fs
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/foreverbell/xv6fs" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fforeverbell%2Fxv6fs", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fforeverbell%2Fxv6fs'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 6949df5e3c794031f71d52b2b2b711d687b3ec52
[INFO] documenting foreverbell/xv6fs against 1.54.0 for beta-1.55-rustdoc-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fforeverbell%2Fxv6fs" "/workspace/builds/worker-6/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-6/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/foreverbell/xv6fs on toolchain 1.54.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.54.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[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 /workspace/builds/worker-6/source/Cargo.toml
[INFO] crate git repo https://github.com/foreverbell/xv6fs already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.54.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+1.54.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] bbbd5c2f5aa2eddaf4419e7f4a0fbbc3a708c126af2715b5991e65b723edec7f
[INFO] running `Command { std: "docker" "start" "-a" "bbbd5c2f5aa2eddaf4419e7f4a0fbbc3a708c126af2715b5991e65b723edec7f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "bbbd5c2f5aa2eddaf4419e7f4a0fbbc3a708c126af2715b5991e65b723edec7f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "bbbd5c2f5aa2eddaf4419e7f4a0fbbc3a708c126af2715b5991e65b723edec7f", kill_on_drop: false }`
[INFO] [stdout] bbbd5c2f5aa2eddaf4419e7f4a0fbbc3a708c126af2715b5991e65b723edec7f
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTDOCFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+1.54.0" "doc" "--frozen" "--no-deps" "--document-private-items" "--message-format=json", kill_on_drop: false }`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] a25ef981efc085aeb10178ab99ab599a6e4567977bbd21e62d54bcdcfedc8873
[INFO] running `Command { std: "docker" "start" "-a" "a25ef981efc085aeb10178ab99ab599a6e4567977bbd21e62d54bcdcfedc8873", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Checking thread-scoped v1.0.2
[INFO] [stderr]     Checking atty v0.2.10
[INFO] [stderr]     Checking log v0.4.1
[INFO] [stderr]    Compiling fuse v0.3.1
[INFO] [stderr]     Checking humantime v1.1.1
[INFO] [stderr]     Checking regex v1.0.0
[INFO] [stderr]     Checking log v0.3.9
[INFO] [stderr]     Checking env_logger v0.5.10
[INFO] [stderr]     Checking xv6fs v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr]  Documenting xv6fs v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]  --> src/lib.rs:1:1
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(specialization)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the feature `specialization` is incomplete and may not be safe to use and/or cause compiler crashes
[INFO] [stdout]  --> src/lib.rs:1:12
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(specialization)]
[INFO] [stdout]   |            ^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(incomplete_features)]` on by default
[INFO] [stdout]   = note: see issue #31844 <https://github.com/rust-lang/rust/issues/31844> for more information
[INFO] [stdout]   = help: consider using `min_specialization` instead, which is more stable and complete
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/buffer.rs:7:1
[INFO] [stdout]    |
[INFO] [stdout] 7  | / bitflags! {
[INFO] [stdout] 8  | |   struct BufFlags: u32 {
[INFO] [stdout] 9  | |     const VALID = 0b01;
[INFO] [stdout] 10 | |     const DIRTY = 0b10;
[INFO] [stdout] 11 | |   }
[INFO] [stdout] 12 | | }
[INFO] [stdout]    | |_^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(deprecated)]` on by default
[INFO] [stdout]    = note: this warning originates in the macro `__impl_bitflags` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/buffer.rs:7:1
[INFO] [stdout]    |
[INFO] [stdout] 7  | / bitflags! {
[INFO] [stdout] 8  | |   struct BufFlags: u32 {
[INFO] [stdout] 9  | |     const VALID = 0b01;
[INFO] [stdout] 10 | |     const DIRTY = 0b10;
[INFO] [stdout] 11 | |   }
[INFO] [stdout] 12 | | }
[INFO] [stdout]    | |_^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this warning originates in the macro `__impl_bitflags` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/buffer.rs:7:1
[INFO] [stdout]    |
[INFO] [stdout] 7  | / bitflags! {
[INFO] [stdout] 8  | |   struct BufFlags: u32 {
[INFO] [stdout] 9  | |     const VALID = 0b01;
[INFO] [stdout] 10 | |     const DIRTY = 0b10;
[INFO] [stdout] 11 | |   }
[INFO] [stdout] 12 | | }
[INFO] [stdout]    | |_^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this warning originates in the macro `__impl_bitflags` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated constant `std::sync::ONCE_INIT`: the `new` function is now preferred
[INFO] [stdout]   --> src/disk.rs:33:1
[INFO] [stdout]    |
[INFO] [stdout] 33 | / lazy_static! {
[INFO] [stdout] 34 | |   pub static ref DISK: DiskService = DiskService {
[INFO] [stdout] 35 | |     channel: Mutex::new(None)
[INFO] [stdout] 36 | |   };
[INFO] [stdout] 37 | | }
[INFO] [stdout]    | |_^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this warning originates in the macro `__lazy_static_create` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]  --> src/lib.rs:1:1
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(specialization)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated constant `std::sync::ONCE_INIT`: the `new` function is now preferred
[INFO] [stdout]   --> src/inode.rs:44:1
[INFO] [stdout]    |
[INFO] [stdout] 44 | / lazy_static! {
[INFO] [stdout] 45 | |   pub static ref ICACHE: Cache = Cache::new(256);
[INFO] [stdout] 46 | | }
[INFO] [stdout]    | |_^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this warning originates in the macro `__lazy_static_create` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated constant `std::sync::ONCE_INIT`: the `new` function is now preferred
[INFO] [stdout]   --> src/logging.rs:36:1
[INFO] [stdout]    |
[INFO] [stdout] 36 | / lazy_static! {
[INFO] [stdout] 37 | |   pub static ref LOGGING: Logging = Logging::new();
[INFO] [stdout] 38 | | }
[INFO] [stdout]    | |_^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this warning originates in the macro `__lazy_static_create` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated constant `std::sync::ONCE_INIT`: the `new` function is now preferred
[INFO] [stdout]   --> src/buffer.rs:27:1
[INFO] [stdout]    |
[INFO] [stdout] 27 | / lazy_static! {
[INFO] [stdout] 28 | |   pub static ref BCACHE: Cache = Cache::new(256);
[INFO] [stdout] 29 | |
[INFO] [stdout] 30 | |   // Block 1 is immutable after file system is created, so we can safely
[INFO] [stdout] ...  |
[INFO] [stdout] 34 | |   );
[INFO] [stdout] 35 | | }
[INFO] [stdout]    | |_^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this warning originates in the macro `__lazy_static_create` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated constant `std::sync::ONCE_INIT`: the `new` function is now preferred
[INFO] [stdout]   --> src/buffer.rs:27:1
[INFO] [stdout]    |
[INFO] [stdout] 27 | / lazy_static! {
[INFO] [stdout] 28 | |   pub static ref BCACHE: Cache = Cache::new(256);
[INFO] [stdout] 29 | |
[INFO] [stdout] 30 | |   // Block 1 is immutable after file system is created, so we can safely
[INFO] [stdout] ...  |
[INFO] [stdout] 34 | |   );
[INFO] [stdout] 35 | | }
[INFO] [stdout]    | |_^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this warning originates in the macro `__lazy_static_create` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: Compilation failed, aborting rustdoc
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 2 previous errors
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0554`.
[INFO] [stdout] 
[INFO] [stderr] error: could not document `xv6fs`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustdoc --crate-type lib --crate-name xv6fs src/lib.rs -o /opt/rustwide/target/doc --error-format=json --json=diagnostic-rendered-ansi --document-private-items -L dependency=/opt/rustwide/target/debug/deps --extern bitflags=/opt/rustwide/target/debug/deps/libbitflags-32539395816124e4.rmeta --extern env_logger=/opt/rustwide/target/debug/deps/libenv_logger-b05d97751b30fb6d.rmeta --extern fuse=/opt/rustwide/target/debug/deps/libfuse-d02c002a8c7d87c1.rmeta --extern lazy_static=/opt/rustwide/target/debug/deps/liblazy_static-4b2a5971e089374b.rmeta --extern libc=/opt/rustwide/target/debug/deps/liblibc-70f6d90ece3a8da2.rmeta --extern log=/opt/rustwide/target/debug/deps/liblog-d5948575141a9a5b.rmeta --extern threadpool=/opt/rustwide/target/debug/deps/libthreadpool-bb1115fa23f7b8c5.rmeta --extern time=/opt/rustwide/target/debug/deps/libtime-ac37f479d2f0c880.rmeta --cap-lints=warn --crate-version 0.1.0` (exit status: 1)
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stdout] error: aborting due to previous error; 9 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0554`.
[INFO] [stdout] 
[INFO] [stderr] error: build failed
[INFO] running `Command { std: "docker" "inspect" "a25ef981efc085aeb10178ab99ab599a6e4567977bbd21e62d54bcdcfedc8873", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a25ef981efc085aeb10178ab99ab599a6e4567977bbd21e62d54bcdcfedc8873", kill_on_drop: false }`
[INFO] [stdout] a25ef981efc085aeb10178ab99ab599a6e4567977bbd21e62d54bcdcfedc8873
