[INFO] cloning repository https://github.com/hatoo/read_to_char_vec_benchmark
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/hatoo/read_to_char_vec_benchmark" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fhatoo%2Fread_to_char_vec_benchmark", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fhatoo%2Fread_to_char_vec_benchmark'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] e19edd599c357569e1306c30e462405456289f9b
[INFO] documenting hatoo/read_to_char_vec_benchmark against 1.47.0 for beta-1.48-rustdoc-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fhatoo%2Fread_to_char_vec_benchmark" "/workspace/builds/worker-7/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-7/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/hatoo/read_to_char_vec_benchmark on toolchain 1.47.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.47.0" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/hatoo/read_to_char_vec_benchmark
[INFO] finished tweaking git repo https://github.com/hatoo/read_to_char_vec_benchmark
[INFO] tweaked toml for git repo https://github.com/hatoo/read_to_char_vec_benchmark written to /workspace/builds/worker-7/source/Cargo.toml
[INFO] crate git repo https://github.com/hatoo/read_to_char_vec_benchmark already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.47.0" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/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" "rustops/crates-build-env@sha256:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+1.47.0" "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] abb086e2b5d417a90032eb20f34c68bcab798ad064dee8407c4c2cc0fe213b39
[INFO] running `Command { std: "docker" "start" "-a" "abb086e2b5d417a90032eb20f34c68bcab798ad064dee8407c4c2cc0fe213b39", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "abb086e2b5d417a90032eb20f34c68bcab798ad064dee8407c4c2cc0fe213b39", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "abb086e2b5d417a90032eb20f34c68bcab798ad064dee8407c4c2cc0fe213b39", kill_on_drop: false }`
[INFO] [stdout] abb086e2b5d417a90032eb20f34c68bcab798ad064dee8407c4c2cc0fe213b39
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/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" "rustops/crates-build-env@sha256:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+1.47.0" "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] d8f187f3aa78a8c1152a7ba079ada6dca858d32a71d9e35650bce6892a6cc83d
[INFO] running `Command { std: "docker" "start" "-a" "d8f187f3aa78a8c1152a7ba079ada6dca858d32a71d9e35650bce6892a6cc83d", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.46
[INFO] [stderr]     Checking ropey v1.0.0
[INFO] [stderr]     Checking num_cpus v1.9.0
[INFO] [stderr]     Checking rayon-core v1.4.1
[INFO] [stderr]     Checking rayon v1.0.3
[INFO] [stderr]  Documenting read_to_char_vec_benchmark v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]  --> src/main.rs:1:1
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(test)]
[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 `read_to_char_vec_benchmark`.
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustdoc --edition=2018 --crate-type bin --crate-name read_to_char_vec_benchmark src/main.rs -o /opt/rustwide/target/doc --error-format=json --json=diagnostic-rendered-ansi --document-private-items -L dependency=/opt/rustwide/target/debug/deps --extern rayon=/opt/rustwide/target/debug/deps/librayon-7c9b82953cd1f483.rmeta --extern ropey=/opt/rustwide/target/debug/deps/libropey-04ebd63db80fdfae.rmeta --cap-lints=warn --crate-version 0.1.0` (exit code: 1)
[INFO] running `Command { std: "docker" "inspect" "d8f187f3aa78a8c1152a7ba079ada6dca858d32a71d9e35650bce6892a6cc83d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d8f187f3aa78a8c1152a7ba079ada6dca858d32a71d9e35650bce6892a6cc83d", kill_on_drop: false }`
[INFO] [stdout] d8f187f3aa78a8c1152a7ba079ada6dca858d32a71d9e35650bce6892a6cc83d
