[INFO] fetching crate get_env 0.1.0...
[INFO] documenting get_env-0.1.0 against 1.61.0 for beta-1.62-rustdoc-1
[INFO] extracting crate get_env 0.1.0 into /workspace/builds/worker-24/source
[INFO] validating manifest of crates.io crate get_env 0.1.0 on toolchain 1.61.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.61.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate get_env 0.1.0
[INFO] finished tweaking crates.io crate get_env 0.1.0
[INFO] tweaked toml for crates.io crate get_env 0.1.0 written to /workspace/builds/worker-24/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.61.0" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.61.0" "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-24/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-24/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:d190cb871061d98bc6d0581d85cb2ecb09a0f8a142ba5463de30be9999fc3251" "/opt/rustwide/cargo-home/bin/cargo" "+1.61.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] a468864bd6a89696e36052412149cfa60e26f23277e621a6f903e237aeca2756
[INFO] running `Command { std: "docker" "start" "-a" "a468864bd6a89696e36052412149cfa60e26f23277e621a6f903e237aeca2756", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "a468864bd6a89696e36052412149cfa60e26f23277e621a6f903e237aeca2756", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a468864bd6a89696e36052412149cfa60e26f23277e621a6f903e237aeca2756", kill_on_drop: false }`
[INFO] [stdout] a468864bd6a89696e36052412149cfa60e26f23277e621a6f903e237aeca2756
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-24/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-24/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:d190cb871061d98bc6d0581d85cb2ecb09a0f8a142ba5463de30be9999fc3251" "/opt/rustwide/cargo-home/bin/cargo" "+1.61.0" "doc" "--frozen" "--no-deps" "--document-private-items" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] a0ecad5fe26ed5e290d553259699136d6bdd794f43b741b56c0cfddf7e44b032
[INFO] running `Command { std: "docker" "start" "-a" "a0ecad5fe26ed5e290d553259699136d6bdd794f43b741b56c0cfddf7e44b032", kill_on_drop: false }`
[INFO] [stderr]  Documenting get_env v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr] error: could not document `get_env`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustdoc --crate-type lib --crate-name get_env src/lib.rs -o /opt/rustwide/target/doc --error-format=json --json=diagnostic-rendered-ansi,artifacts,future-incompat --document-private-items -C metadata=c74309aadf38118d -L dependency=/opt/rustwide/target/debug/deps --extern lazy_static=/opt/rustwide/target/debug/deps/liblazy_static-1479f2b7adeaa2b6.rmeta --extern libc=/opt/rustwide/target/debug/deps/liblibc-4e90763dd2291129.rmeta --cap-lints=warn --crate-version 0.1.0` (exit status: 1)
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]   --> src/lib.rs:35:2
[INFO] [stdout]    |
[INFO] [stdout] 35 |     feature(used)
[INFO] [stdout]    |     ^^^^^^^^^^^^^ help: remove the attribute
[INFO] [stdout]    |
[INFO] [stdout]    = help: the feature `used` has been stable since 1.30.0 and no longer requires an attribute to enable
[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] 
[ERROR] error running command: no output for 300 seconds
[INFO] running `Command { std: "docker" "inspect" "a0ecad5fe26ed5e290d553259699136d6bdd794f43b741b56c0cfddf7e44b032", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a0ecad5fe26ed5e290d553259699136d6bdd794f43b741b56c0cfddf7e44b032", kill_on_drop: false }`
[INFO] [stderr] Error response from daemon: Could not kill running container a0ecad5fe26ed5e290d553259699136d6bdd794f43b741b56c0cfddf7e44b032, cannot remove - tried to kill container, but did not receive an exit event
[ERROR] failed to delete container a0ecad5fe26ed5e290d553259699136d6bdd794f43b741b56c0cfddf7e44b032
[ERROR] caused by: command failed: exit status: 1