[INFO] cloning repository https://github.com/kevin-lesenechal/nucloid
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/kevin-lesenechal/nucloid" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fkevin-lesenechal%2Fnucloid", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fkevin-lesenechal%2Fnucloid'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] bb2d4b8507a3cb17fdb597c7b386b042c261cad8
[INFO] documenting kevin-lesenechal/nucloid 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%2Fkevin-lesenechal%2Fnucloid" "/workspace/builds/worker-30/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-30/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/kevin-lesenechal/nucloid 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] removed /workspace/builds/worker-30/source/.cargo/config.toml
[INFO] started tweaking git repo https://github.com/kevin-lesenechal/nucloid
[INFO] finished tweaking git repo https://github.com/kevin-lesenechal/nucloid
[INFO] tweaked toml for git repo https://github.com/kevin-lesenechal/nucloid written to /workspace/builds/worker-30/source/Cargo.toml
[INFO] crate git repo https://github.com/kevin-lesenechal/nucloid 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]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded raw-cpuid v10.2.0
[INFO] [stderr]   Downloaded x86 v0.47.0
[INFO] [stderr]   Downloaded multiboot2 v0.10.1
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-30/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-30/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] b9919bbfc1511510aebf0a11fb2af6c66208a2a657902f880a5339a9db7119d2
[INFO] running `Command { std: "docker" "start" "-a" "b9919bbfc1511510aebf0a11fb2af6c66208a2a657902f880a5339a9db7119d2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "b9919bbfc1511510aebf0a11fb2af6c66208a2a657902f880a5339a9db7119d2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b9919bbfc1511510aebf0a11fb2af6c66208a2a657902f880a5339a9db7119d2", kill_on_drop: false }`
[INFO] [stdout] b9919bbfc1511510aebf0a11fb2af6c66208a2a657902f880a5339a9db7119d2
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-30/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-30/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] 13bb03073a32a752f90e7feffda7010f00c599cf6989ce2cbc9daeb6a36b7aeb
[INFO] running `Command { std: "docker" "start" "-a" "13bb03073a32a752f90e7feffda7010f00c599cf6989ce2cbc9daeb6a36b7aeb", kill_on_drop: false }`
[INFO] [stderr]    Compiling autocfg v1.1.0
[INFO] [stderr]    Compiling bitflags v1.2.1
[INFO] [stderr]    Compiling cc v1.0.67
[INFO] [stderr]    Compiling x86 v0.47.0
[INFO] [stderr]     Checking bit_field v0.10.1
[INFO] [stderr]     Checking arrayvec v0.7.2
[INFO] [stderr]    Compiling num-traits v0.2.14
[INFO] [stderr]    Compiling num-integer v0.1.44
[INFO] [stderr]    Compiling nucloid v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Checking raw-cpuid v10.2.0
[INFO] [stderr]     Checking multiboot2 v0.10.1
[INFO] [stderr]  Documenting nucloid 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:14:1
[INFO] [stdout]    |
[INFO] [stdout] 14 | #![feature(panic_info_message)]
[INFO] [stdout]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]   --> src/main.rs:15:1
[INFO] [stdout]    |
[INFO] [stdout] 15 | #![feature(const_mut_refs)]
[INFO] [stdout]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]   --> src/main.rs:16:1
[INFO] [stdout]    |
[INFO] [stdout] 16 | #![feature(alloc_error_handler)]
[INFO] [stdout]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]   --> src/main.rs:17:1
[INFO] [stdout]    |
[INFO] [stdout] 17 | #![feature(const_trait_impl)]
[INFO] [stdout]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: Compilation failed, aborting rustdoc
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 5 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 `nucloid`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustdoc --edition=2018 --crate-type bin --crate-name nucloid src/main.rs -o /opt/rustwide/target/doc --error-format=json --json=diagnostic-rendered-ansi,artifacts,future-incompat --document-private-items -C metadata=93e62f88f9563d5b -L dependency=/opt/rustwide/target/debug/deps --extern arrayvec=/opt/rustwide/target/debug/deps/libarrayvec-46e0d6b4216b4a42.rmeta --extern multiboot2=/opt/rustwide/target/debug/deps/libmultiboot2-11d7c9a96bf20d8f.rmeta --extern num_integer=/opt/rustwide/target/debug/deps/libnum_integer-d5486bf53c5b7262.rmeta --extern x86=/opt/rustwide/target/debug/deps/libx86-60e88d81e8d96aca.rmeta --cap-lints=warn --crate-version 0.1.0` (exit status: 1)
[INFO] running `Command { std: "docker" "inspect" "13bb03073a32a752f90e7feffda7010f00c599cf6989ce2cbc9daeb6a36b7aeb", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "13bb03073a32a752f90e7feffda7010f00c599cf6989ce2cbc9daeb6a36b7aeb", kill_on_drop: false }`
[INFO] [stdout] 13bb03073a32a752f90e7feffda7010f00c599cf6989ce2cbc9daeb6a36b7aeb