[INFO] cloning repository https://github.com/gfreezy/bitcask-rs
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/gfreezy/bitcask-rs" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fgfreezy%2Fbitcask-rs", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fgfreezy%2Fbitcask-rs'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 04fabaaf969b18319475ba6cebafde3d690aa5e5
[INFO] documenting gfreezy/bitcask-rs 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%2Fgfreezy%2Fbitcask-rs" "/workspace/builds/worker-0/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-0/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/gfreezy/bitcask-rs 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/gfreezy/bitcask-rs
[INFO] finished tweaking git repo https://github.com/gfreezy/bitcask-rs
[INFO] tweaked toml for git repo https://github.com/gfreezy/bitcask-rs written to /workspace/builds/worker-0/source/Cargo.toml
[INFO] crate git repo https://github.com/gfreezy/bitcask-rs 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-0/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/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] [stdout] 0fb2acc16eae8547aef99ba85460c81360597a7e2b1e51304794d1bb2e005d96
[INFO] running `Command { std: "docker" "start" "-a" "0fb2acc16eae8547aef99ba85460c81360597a7e2b1e51304794d1bb2e005d96", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "0fb2acc16eae8547aef99ba85460c81360597a7e2b1e51304794d1bb2e005d96", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "0fb2acc16eae8547aef99ba85460c81360597a7e2b1e51304794d1bb2e005d96", kill_on_drop: false }`
[INFO] [stdout] 0fb2acc16eae8547aef99ba85460c81360597a7e2b1e51304794d1bb2e005d96
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/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] [stdout] 6256758997cc184b5858935d052087dd9edab5c931c7d8327b72fa0717246b07
[INFO] running `Command { std: "docker" "start" "-a" "6256758997cc184b5858935d052087dd9edab5c931c7d8327b72fa0717246b07", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling proc-macro2 v0.4.15
[INFO] [stderr]    Compiling num-traits v0.2.5
[INFO] [stderr]    Compiling serde v1.0.75
[INFO] [stderr]    Compiling num-integer v0.1.39
[INFO] [stderr]    Compiling failure_derive v0.1.2
[INFO] [stderr]    Compiling derive_builder v0.5.1
[INFO] [stderr]     Checking crossbeam v0.3.2
[INFO] [stderr]     Checking log-mdc v0.1.0
[INFO] [stderr]     Checking io-at v0.4.1
[INFO] [stderr]    Compiling miniz-sys v0.1.10
[INFO] [stderr]    Compiling backtrace-sys v0.1.24
[INFO] [stderr]     Checking yaml-rust v0.4.0
[INFO] [stderr]     Checking unsafe-any v0.4.2
[INFO] [stderr]     Checking itertools v0.7.8
[INFO] [stderr]    Compiling syn v0.11.11
[INFO] [stderr]     Checking uuid v0.6.5
[INFO] [stderr]     Checking typemap v0.3.3
[INFO] [stderr]    Compiling derive_builder_core v0.2.0
[INFO] [stderr]    Compiling quote v0.6.8
[INFO] [stderr]     Checking backtrace v0.3.9
[INFO] [stderr]     Checking num-traits v0.1.43
[INFO] [stderr]     Checking flate2 v1.0.2
[INFO] [stderr]    Compiling syn v0.14.9
[INFO] [stderr]     Checking ordered-float v0.5.0
[INFO] [stderr]     Checking chrono v0.4.6
[INFO] [stderr]     Checking serde-value v0.5.2
[INFO] [stderr]     Checking log v0.4.4
[INFO] [stderr]     Checking serde_json v1.0.26
[INFO] [stderr]     Checking serde_yaml v0.7.5
[INFO] [stderr]     Checking serde_yaml v0.8.2
[INFO] [stderr]    Compiling synstructure v0.9.0
[INFO] [stderr]    Compiling serde_derive v1.0.75
[INFO] [stderr]     Checking failure v0.1.2
[INFO] [stderr]     Checking log4rs v0.8.0
[INFO] [stderr]  Documenting bitcask-rs v0.1.1 (/opt/rustwide/workdir)
[INFO] [stderr] error: could not document `bitcask-rs`
[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(nll)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] 
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]  --> src/lib.rs:2:1
[INFO] [stdout]   |
[INFO] [stdout] 2 | #![feature(test)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] Caused by:
[INFO] [stdout] error: Compilation failed, aborting rustdoc
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]   process didn't exit successfully: `rustdoc --crate-type lib --crate-name bitcask_rs 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 derive_builder=/opt/rustwide/target/debug/deps/libderive_builder-640ab02fbdddf68b.so --extern failure=/opt/rustwide/target/debug/deps/libfailure-6eef04b1a1d1ec05.rmeta --extern integer_encoding=/opt/rustwide/target/debug/deps/libinteger_encoding-4129a8f6f2b9761d.rmeta --extern io_at=/opt/rustwide/target/debug/deps/libio_at-03211a21cc64c8aa.rmeta --extern itertools=/opt/rustwide/target/debug/deps/libitertools-2c7d15b347124efc.rmeta --extern lazy_static=/opt/rustwide/target/debug/deps/liblazy_static-3797deae7bd81867.rmeta --extern log=/opt/rustwide/target/debug/deps/liblog-bd7767b3106f1008.rmeta --extern log4rs=/opt/rustwide/target/debug/deps/liblog4rs-a733ae054fd33188.rmeta --extern regex=/opt/rustwide/target/debug/deps/libregex-c4c762c0bbe346da.rmeta --extern serde=/opt/rustwide/target/debug/deps/libserde-a0c0e4e28fa30544.rmeta --extern serde_derive=/opt/rustwide/target/debug/deps/libserde_derive-b71a53088e776e1a.so --extern serde_yaml=/opt/rustwide/target/debug/deps/libserde_yaml-47c623860d8c3628.rmeta --extern twox_hash=/opt/rustwide/target/debug/deps/libtwox_hash-4449cba2c6ec2ff4.rmeta --extern uuid=/opt/rustwide/target/debug/deps/libuuid-02f69977914d474f.rmeta --cap-lints=warn --crate-version 0.1.1` (exit status: 1)
[INFO] [stdout] error: aborting due to 3 previous errors
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0554`.
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "6256758997cc184b5858935d052087dd9edab5c931c7d8327b72fa0717246b07", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "6256758997cc184b5858935d052087dd9edab5c931c7d8327b72fa0717246b07", kill_on_drop: false }`
[INFO] [stdout] 6256758997cc184b5858935d052087dd9edab5c931c7d8327b72fa0717246b07
