[INFO] cloning repository https://github.com/3for/rustLearning
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/3for/rustLearning" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2F3for%2FrustLearning", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2F3for%2FrustLearning'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 5e833fc5d7817bdc16a205e96707b3cf8f48dbd2
[INFO] documenting 3for/rustLearning against beta-2021-08-01 for beta-1.55-rustdoc-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2F3for%2FrustLearning" "/workspace/builds/worker-22/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-22/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/3for/rustLearning on toolchain beta-2021-08-01
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2021-08-01" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/3for/rustLearning
[INFO] finished tweaking git repo https://github.com/3for/rustLearning
[INFO] tweaked toml for git repo https://github.com/3for/rustLearning written to /workspace/builds/worker-22/source/Cargo.toml
[INFO] crate git repo https://github.com/3for/rustLearning already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2021-08-01" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-22/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-22/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" "+beta-2021-08-01" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 1362c548d7e69f0c44bef855838de4bf2dafef832e2b30090ef873d8aea46b55
[INFO] running `Command { std: "docker" "start" "-a" "1362c548d7e69f0c44bef855838de4bf2dafef832e2b30090ef873d8aea46b55", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "1362c548d7e69f0c44bef855838de4bf2dafef832e2b30090ef873d8aea46b55", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1362c548d7e69f0c44bef855838de4bf2dafef832e2b30090ef873d8aea46b55", kill_on_drop: false }`
[INFO] [stdout] 1362c548d7e69f0c44bef855838de4bf2dafef832e2b30090ef873d8aea46b55
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-22/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-22/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" "+beta-2021-08-01" "doc" "--frozen" "--no-deps" "--document-private-items" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 7133a24bdafb9984304aade10d398054fe71e45a582862e37ce1b2eae56cfba6
[INFO] running `Command { std: "docker" "start" "-a" "7133a24bdafb9984304aade10d398054fe71e45a582862e37ce1b2eae56cfba6", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Checking libc v0.2.42
[INFO] [stderr]     Checking cfg-if v0.1.3
[INFO] [stderr]     Checking futures v0.1.21
[INFO] [stderr]     Checking byteorder v1.2.3
[INFO] [stderr]     Checking slab v0.4.0
[INFO] [stderr]     Checking lazycell v0.6.0
[INFO] [stderr]     Checking nodrop v0.1.12
[INFO] [stderr]     Checking lazy_static v1.0.1
[INFO] [stderr]     Checking memoffset v0.2.1
[INFO] [stderr]    Compiling winapi-build v0.1.1
[INFO] [stderr]     Checking smallvec v0.6.2
[INFO] [stderr]     Checking stable_deref_trait v1.1.0
[INFO] [stderr]    Compiling cc v1.0.17
[INFO] [stderr]     Checking winapi v0.2.8
[INFO] [stderr]     Checking void v1.0.2
[INFO] [stderr]     Checking safemem v0.2.0
[INFO] [stderr]    Compiling num-traits v0.2.5
[INFO] [stderr]     Checking matches v0.1.6
[INFO] [stderr]     Checking unicode-normalization v0.1.7
[INFO] [stderr]    Compiling serde v1.0.66
[INFO] [stderr]    Compiling version_check v0.1.3
[INFO] [stderr]     Checking httparse v1.2.4
[INFO] [stderr]     Checking utf8-ranges v0.1.3
[INFO] [stderr]     Checking regex-syntax v0.3.9
[INFO] [stderr]     Checking rustc-demangle v0.1.8
[INFO] [stderr]     Checking dtoa v0.4.2
[INFO] [stderr]     Checking itoa v0.4.1
[INFO] [stderr]     Checking indexmap v1.0.1
[INFO] [stderr]     Checking string v0.1.0
[INFO] [stderr]     Checking take v0.1.0
[INFO] [stderr]     Checking smallvec v0.2.1
[INFO] [stderr]     Checking byteorder v0.5.3
[INFO] [stderr]     Checking bit-vec v0.4.4
[INFO] [stderr]     Checking error v0.1.0 (/opt/rustwide/workdir/error)
[INFO] [stderr]  Documenting pubsub v0.1.0 (/opt/rustwide/workdir/pubsub)
[INFO] [stderr]  Documenting error v0.1.0 (/opt/rustwide/workdir/error)
[INFO] [stderr]    Compiling proc-macro2 v0.4.6
[INFO] [stderr]     Checking owning_ref v0.3.3
[INFO] [stderr]     Checking iovec v0.1.2
[INFO] [stderr]     Checking rand v0.4.2
[INFO] [stderr]     Checking num_cpus v1.8.0
[INFO] [stderr]     Checking memchr v0.1.11
[INFO] [stderr]     Checking time v0.1.40
[INFO] [stderr]    Compiling quote v0.6.3
[INFO] [stderr]     Checking log v0.4.2
[INFO] [stderr]     Checking net2 v0.2.32
[INFO] [stderr]     Checking crossbeam-utils v0.3.2
[INFO] [stderr]     Checking unix_socket v0.5.0
[INFO] [stderr]    Compiling kernel32-sys v0.2.2
[INFO] [stderr]     Checking unicode-bidi v0.3.4
[INFO] [stderr]    Compiling unicase v2.1.0
[INFO] [stderr]     Checking arrayvec v0.4.7
[INFO] [stderr]     Checking base64 v0.9.2
[INFO] [stderr]    Compiling syn v0.14.2
[INFO] [stderr]     Checking tokio-executor v0.1.2
[INFO] [stderr]     Checking futures-cpupool v0.1.8
[INFO] [stderr]     Checking tokio-timer v0.1.2
[INFO] [stderr]     Checking tokio-service v0.1.0
[INFO] [stderr]     Checking relay v0.1.1
[INFO] [stderr]     Checking parking_lot_core v0.2.14
[INFO] [stderr]     Checking rand v0.3.22
[INFO] [stderr]     Checking aho-corasick v0.5.3
[INFO] [stderr]     Checking bytes v0.4.8
[INFO] [stderr]     Checking log v0.3.9
[INFO] [stderr]     Checking tls-api v0.1.19
[INFO] [stderr]     Checking want v0.0.5
[INFO] [stderr]     Checking mio v0.6.14
[INFO] [stderr]     Checking idna v0.1.4
[INFO] [stderr]     Checking crossbeam-epoch v0.4.3
[INFO] [stderr]     Checking uuid v0.5.1
[INFO] [stderr]     Checking tokio-timer v0.2.4
[INFO] [stderr]     Checking tls-api-stub v0.1.19
[INFO] [stderr]     Checking parking_lot v0.5.5
[INFO] [stderr]     Checking tokio-io v0.1.7
[INFO] [stderr]     Checking protobuf v1.5.1
[INFO] [stderr]     Checking http v0.1.6
[INFO] [stderr]     Checking crossbeam-deque v0.3.1
[INFO] [stderr]     Checking util v0.1.0 (/opt/rustwide/workdir/util)
[INFO] [stderr]  Documenting util v0.1.0 (/opt/rustwide/workdir/util)
[INFO] [stderr]     Checking thread-id v2.0.0
[INFO] [stderr]     Checking tokio-threadpool v0.1.4
[INFO] [stderr]     Checking tokio-codec v0.1.0
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stdout]  --> util/src/lib.rs:1:1
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(try_from)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^
[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 `util`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustdoc --crate-type lib --crate-name util util/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 libc=/opt/rustwide/target/debug/deps/liblibc-df31ac51ef5b21f3.rmeta --extern parking_lot=/opt/rustwide/target/debug/deps/libparking_lot-6753a96d5c5285fc.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[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stdout]  --> util/src/lib.rs:1:1
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(try_from)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to previous error
[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" "7133a24bdafb9984304aade10d398054fe71e45a582862e37ce1b2eae56cfba6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "7133a24bdafb9984304aade10d398054fe71e45a582862e37ce1b2eae56cfba6", kill_on_drop: false }`
[INFO] [stdout] 7133a24bdafb9984304aade10d398054fe71e45a582862e37ce1b2eae56cfba6
