[INFO] cloning repository https://github.com/j-browne/hamming
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/j-browne/hamming" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fj-browne%2Fhamming", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fj-browne%2Fhamming'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 22fd96a8be8428a5bd04f3d08e111dd0f43ce414
[INFO] documenting j-browne/hamming 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%2Fj-browne%2Fhamming" "/workspace/builds/worker-1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/j-browne/hamming 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/j-browne/hamming
[INFO] finished tweaking git repo https://github.com/j-browne/hamming
[INFO] tweaked toml for git repo https://github.com/j-browne/hamming written to /workspace/builds/worker-1/source/Cargo.toml
[INFO] crate git repo https://github.com/j-browne/hamming 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 os_str_bytes v6.0.0
[INFO] [stderr]   Downloaded textwrap v0.14.2
[INFO] [stderr]   Downloaded tap v1.0.1
[INFO] [stderr]   Downloaded wyz v0.5.0
[INFO] [stderr]   Downloaded clap_derive v3.1.0
[INFO] [stderr]   Downloaded bitvec v1.0.0
[INFO] [stderr]   Downloaded funty v2.0.0
[INFO] [stderr]   Downloaded radium v0.7.0
[INFO] [stderr]   Downloaded indexmap v1.8.0
[INFO] [stderr]   Downloaded getrandom v0.2.4
[INFO] [stderr]   Downloaded clap v3.1.0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/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] 4a84572bac5f9b6b0982354f79693a965171b54fab8ee33c213abff350f2bc9f
[INFO] running `Command { std: "docker" "start" "-a" "4a84572bac5f9b6b0982354f79693a965171b54fab8ee33c213abff350f2bc9f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "4a84572bac5f9b6b0982354f79693a965171b54fab8ee33c213abff350f2bc9f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "4a84572bac5f9b6b0982354f79693a965171b54fab8ee33c213abff350f2bc9f", kill_on_drop: false }`
[INFO] [stdout] 4a84572bac5f9b6b0982354f79693a965171b54fab8ee33c213abff350f2bc9f
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/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] b0959a1e57958ab84ac2dda6b0e315580949608edbdde187e8ee57c265fab7e2
[INFO] running `Command { std: "docker" "start" "-a" "b0959a1e57958ab84ac2dda6b0e315580949608edbdde187e8ee57c265fab7e2", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.36
[INFO] [stderr]    Compiling libc v0.2.119
[INFO] [stderr]    Compiling syn v1.0.86
[INFO] [stderr]    Compiling radium v0.7.0
[INFO] [stderr]    Compiling heck v0.4.0
[INFO] [stderr]     Checking tap v1.0.1
[INFO] [stderr]     Checking hashbrown v0.11.2
[INFO] [stderr]     Checking funty v2.0.0
[INFO] [stderr]     Checking strsim v0.10.0
[INFO] [stderr]     Checking textwrap v0.14.2
[INFO] [stderr]    Compiling proc-macro-error-attr v1.0.4
[INFO] [stderr]    Compiling proc-macro-error v1.0.4
[INFO] [stderr]    Compiling indexmap v1.8.0
[INFO] [stderr]     Checking memchr v2.4.1
[INFO] [stderr]     Checking wyz v0.5.0
[INFO] [stderr]     Checking os_str_bytes v6.0.0
[INFO] [stderr]     Checking bitvec v1.0.0
[INFO] [stderr]     Checking getrandom v0.2.4
[INFO] [stderr]     Checking atty v0.2.14
[INFO] [stderr]    Compiling quote v1.0.15
[INFO] [stderr]     Checking rand_core v0.6.3
[INFO] [stderr]     Checking rand_chacha v0.3.1
[INFO] [stderr]     Checking rand v0.8.5
[INFO] [stderr]    Compiling clap_derive v3.1.0
[INFO] [stderr]    Compiling thiserror-impl v1.0.30
[INFO] [stderr]     Checking thiserror v1.0.30
[INFO] [stderr]     Checking clap v3.1.0
[INFO] [stderr]     Checking hamming v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr]  Documenting hamming v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]  --> src/lib.rs:3:12
[INFO] [stdout]   |
[INFO] [stdout] 3 | #![feature(int_log)]
[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 `hamming` due to 2 previous errors
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]  --> src/lib.rs:3:12
[INFO] [stdout]   |
[INFO] [stdout] 3 | #![feature(int_log)]
[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 document `hamming`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustdoc --edition=2021 --crate-type lib --crate-name hamming src/lib.rs -o /opt/rustwide/target/doc --error-format=json --json=diagnostic-rendered-ansi,artifacts,future-incompat --document-private-items -C metadata=7ea02978baa13f88 -L dependency=/opt/rustwide/target/debug/deps --extern bitvec=/opt/rustwide/target/debug/deps/libbitvec-001440c47445c5fe.rmeta --extern clap=/opt/rustwide/target/debug/deps/libclap-0f77c0b93e6ecc90.rmeta --extern rand=/opt/rustwide/target/debug/deps/librand-62efd79e3f00b65a.rmeta --extern thiserror=/opt/rustwide/target/debug/deps/libthiserror-408ecd4c3507b75d.rmeta --cap-lints=warn --crate-version 0.1.0` (exit status: 1)
[INFO] running `Command { std: "docker" "inspect" "b0959a1e57958ab84ac2dda6b0e315580949608edbdde187e8ee57c265fab7e2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b0959a1e57958ab84ac2dda6b0e315580949608edbdde187e8ee57c265fab7e2", kill_on_drop: false }`
[INFO] [stdout] b0959a1e57958ab84ac2dda6b0e315580949608edbdde187e8ee57c265fab7e2