[INFO] cloning repository https://github.com/poly000/bmi-calculator
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/poly000/bmi-calculator" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fpoly000%2Fbmi-calculator", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fpoly000%2Fbmi-calculator'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] c9193035f3be65fb067633630fb70659f627ce02
[INFO] documenting poly000/bmi-calculator against 1.61.0 for beta-1.62-rustdoc-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fpoly000%2Fbmi-calculator" "/workspace/builds/worker-3/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-3/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/poly000/bmi-calculator 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 git repo https://github.com/poly000/bmi-calculator
[INFO] finished tweaking git repo https://github.com/poly000/bmi-calculator
[INFO] tweaked toml for git repo https://github.com/poly000/bmi-calculator written to /workspace/builds/worker-3/source/Cargo.toml
[INFO] crate git repo https://github.com/poly000/bmi-calculator already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.61.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded ndless-static-vars v2.1.0
[INFO] [stderr]   Downloaded cty v0.1.5
[INFO] [stderr]   Downloaded cstr_core v0.1.2
[INFO] [stderr]   Downloaded ndless-macros v0.4.0
[INFO] [stderr]   Downloaded ndless v0.8.7
[INFO] [stderr]   Downloaded embedded-ffi v0.1.2
[INFO] [stderr]   Downloaded ndless-handler v0.3.0
[INFO] [stderr]   Downloaded ndless-sys v0.2.0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/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] a9e0e8f39a73a4f447c789b5700f38ebc31614e5c96e3e1c614bf4c3b64f0689
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "a9e0e8f39a73a4f447c789b5700f38ebc31614e5c96e3e1c614bf4c3b64f0689", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "a9e0e8f39a73a4f447c789b5700f38ebc31614e5c96e3e1c614bf4c3b64f0689", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a9e0e8f39a73a4f447c789b5700f38ebc31614e5c96e3e1c614bf4c3b64f0689", kill_on_drop: false }`
[INFO] [stdout] a9e0e8f39a73a4f447c789b5700f38ebc31614e5c96e3e1c614bf4c3b64f0689
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/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] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 2af1a63a95d72c6dab06144274f65607ca1e63c4a91f27d7ccdb6424a70f1900
[INFO] running `Command { std: "docker" "start" "-a" "2af1a63a95d72c6dab06144274f65607ca1e63c4a91f27d7ccdb6424a70f1900", kill_on_drop: false }`
[INFO] [stderr]    Compiling unicode-xid v0.2.2
[INFO] [stderr]    Compiling memchr v2.4.1
[INFO] [stderr]    Compiling syn v1.0.75
[INFO] [stderr]     Checking cty v0.1.5
[INFO] [stderr]     Checking cty v0.2.1
[INFO] [stderr]    Compiling ndless-static-vars v2.1.0
[INFO] [stderr]     Checking ndless-sys v0.2.0
[INFO] [stderr]    Compiling proc-macro2 v1.0.28
[INFO] [stderr]    Compiling quote v1.0.9
[INFO] [stderr]     Checking cstr_core v0.1.2
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]   --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/cstr_core-0.1.2/src/lib.rs:12:40
[INFO] [stdout]    |
[INFO] [stdout] 12 | #![cfg_attr(feature = "alloc", feature(alloc))]
[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: could not compile `cstr_core` due to 2 previous errors
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] running `Command { std: "docker" "inspect" "2af1a63a95d72c6dab06144274f65607ca1e63c4a91f27d7ccdb6424a70f1900", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "2af1a63a95d72c6dab06144274f65607ca1e63c4a91f27d7ccdb6424a70f1900", kill_on_drop: false }`
[INFO] [stdout] 2af1a63a95d72c6dab06144274f65607ca1e63c4a91f27d7ccdb6424a70f1900