[INFO] cloning repository https://github.com/Buzzec/virpil
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/Buzzec/virpil" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FBuzzec%2Fvirpil", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FBuzzec%2Fvirpil'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] bfe548f730751be598c7e25f226fc0971ddfa29a
[INFO] documenting Buzzec/virpil 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%2FBuzzec%2Fvirpil" "/workspace/builds/worker-9/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-9/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/Buzzec/virpil 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/Buzzec/virpil
[INFO] finished tweaking git repo https://github.com/Buzzec/virpil
[INFO] tweaked toml for git repo https://github.com/Buzzec/virpil written to /workspace/builds/worker-9/source/Cargo.toml
[INFO] crate git repo https://github.com/Buzzec/virpil 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]  Downloading crates ...
[INFO] [stderr]   Downloaded hidapi v1.3.3
[INFO] [stderr]   Downloaded array-init v2.0.0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/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] 4f1c3bf4321cba3bbaf3fd44996d7bda751da57545927cdd03280d53cb5058de
[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" "4f1c3bf4321cba3bbaf3fd44996d7bda751da57545927cdd03280d53cb5058de", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "4f1c3bf4321cba3bbaf3fd44996d7bda751da57545927cdd03280d53cb5058de", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "4f1c3bf4321cba3bbaf3fd44996d7bda751da57545927cdd03280d53cb5058de", kill_on_drop: false }`
[INFO] [stdout] 4f1c3bf4321cba3bbaf3fd44996d7bda751da57545927cdd03280d53cb5058de
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/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] 456701277f2506a49d75e284d08bd87e107d9a133759f7de3b909c18499964ab
[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" "456701277f2506a49d75e284d08bd87e107d9a133759f7de3b909c18499964ab", kill_on_drop: false }`
[INFO] [stderr]     Checking cfg-if v1.0.0
[INFO] [stderr]    Compiling crossbeam-utils v0.8.7
[INFO] [stderr]    Compiling proc-macro2 v1.0.36
[INFO] [stderr]     Checking lazy_static v1.4.0
[INFO] [stderr]    Compiling libc v0.2.119
[INFO] [stderr]    Compiling unicode-xid v0.2.2
[INFO] [stderr]    Compiling rustversion v1.0.6
[INFO] [stderr]    Compiling syn v1.0.86
[INFO] [stderr]    Compiling pkg-config v0.3.24
[INFO] [stderr]    Compiling cc v1.0.73
[INFO] [stderr]     Checking bitflags v1.3.2
[INFO] [stderr]    Compiling heck v0.4.0
[INFO] [stderr]     Checking array-init v2.0.0
[INFO] [stderr]     Checking crossbeam-epoch v0.9.7
[INFO] [stderr]     Checking crossbeam-channel v0.5.2
[INFO] [stderr]     Checking crossbeam-queue v0.3.4
[INFO] [stderr]    Compiling quote v1.0.15
[INFO] [stderr]    Compiling hidapi v1.3.3
[INFO] [stderr]     Checking crossbeam-deque v0.8.1
[INFO] [stderr]     Checking crossbeam v0.8.1
[INFO] [stderr]     Checking nix v0.23.1
[INFO] [stderr]    Compiling strum_macros v0.24.0
[INFO] [stderr]     Checking ctrlc v3.2.1
[INFO] [stderr]     Checking strum v0.24.0
[INFO] [stderr]  Documenting virpil 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:2:1
[INFO] [stdout]   |
[INFO] [stdout] 2 | #![feature(generic_const_exprs, split_array)]
[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 `virpil`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustdoc --edition=2021 --crate-type bin --crate-name virpil src/main.rs -o /opt/rustwide/target/doc --error-format=json --json=diagnostic-rendered-ansi,artifacts,future-incompat --document-private-items -C metadata=7f8afed1260a04f8 -L dependency=/opt/rustwide/target/debug/deps --extern array_init=/opt/rustwide/target/debug/deps/libarray_init-289bf2c828644f3a.rmeta --extern crossbeam=/opt/rustwide/target/debug/deps/libcrossbeam-0732e4fc28d9fe1b.rmeta --extern ctrlc=/opt/rustwide/target/debug/deps/libctrlc-661bbec05ac6536f.rmeta --extern hidapi=/opt/rustwide/target/debug/deps/libhidapi-ceeff0f1504ddfcf.rmeta --extern strum=/opt/rustwide/target/debug/deps/libstrum-fda62db361998645.rmeta --cap-lints=warn --crate-version 0.1.0` (exit status: 1)
[INFO] running `Command { std: "docker" "inspect" "456701277f2506a49d75e284d08bd87e107d9a133759f7de3b909c18499964ab", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "456701277f2506a49d75e284d08bd87e107d9a133759f7de3b909c18499964ab", kill_on_drop: false }`
[INFO] [stdout] 456701277f2506a49d75e284d08bd87e107d9a133759f7de3b909c18499964ab