[INFO] cloning repository https://github.com/ls1-sys-prog-course/task1-syscalls
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/ls1-sys-prog-course/task1-syscalls" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fls1-sys-prog-course%2Ftask1-syscalls", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fls1-sys-prog-course%2Ftask1-syscalls'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] bd1f32a65ca5ea6e6ddcfa31c8baad564d29ea5c
[INFO] documenting ls1-sys-prog-course/task1-syscalls against beta-2023-04-20 for beta-1.70-rustdoc-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fls1-sys-prog-course%2Ftask1-syscalls" "/workspace/builds/worker-4-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-4-tc2/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/ls1-sys-prog-course/task1-syscalls on toolchain beta-2023-04-20
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+beta-2023-04-20" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/ls1-sys-prog-course/task1-syscalls
[INFO] finished tweaking git repo https://github.com/ls1-sys-prog-course/task1-syscalls
[INFO] tweaked toml for git repo https://github.com/ls1-sys-prog-course/task1-syscalls written to /workspace/builds/worker-4-tc2/source/Cargo.toml
[INFO] crate git repo https://github.com/ls1-sys-prog-course/task1-syscalls already has a lockfile, it will not be regenerated
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+beta-2023-04-20" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/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@sha256:5ff2268d62e97bff2cde7d5815dd6ed5b47097566f13b8d0ca110b04b60e07ed" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2023-04-20" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 1e61d54247ac253dc7f14523892ed36305524e81797f59a2013e67685d813d05
[INFO] running `Command { std: "docker" "start" "-a" "1e61d54247ac253dc7f14523892ed36305524e81797f59a2013e67685d813d05", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "1e61d54247ac253dc7f14523892ed36305524e81797f59a2013e67685d813d05", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1e61d54247ac253dc7f14523892ed36305524e81797f59a2013e67685d813d05", kill_on_drop: false }`
[INFO] [stdout] 1e61d54247ac253dc7f14523892ed36305524e81797f59a2013e67685d813d05
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/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" "RUSTFLAGS=--cap-lints=warn" "-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@sha256:5ff2268d62e97bff2cde7d5815dd6ed5b47097566f13b8d0ca110b04b60e07ed" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2023-04-20" "doc" "--frozen" "--no-deps" "--document-private-items" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 31646a3fa64baecec1acc134689291950497378a1c8a849151da9adbc5f8f2d5
[INFO] running `Command { std: "docker" "start" "-a" "31646a3fa64baecec1acc134689291950497378a1c8a849151da9adbc5f8f2d5", kill_on_drop: false }`
[INFO] [stderr]    Compiling autocfg v1.1.0
[INFO] [stderr]    Compiling libc v0.2.141
[INFO] [stderr]     Checking cfg-if v1.0.0
[INFO] [stderr]     Checking static_assertions v1.1.0
[INFO] [stderr]     Checking pin-utils v0.1.0
[INFO] [stderr]     Checking bitflags v1.3.2
[INFO] [stderr]    Compiling memoffset v0.7.1
[INFO] [stderr]     Checking nix v0.26.2
[INFO] [stderr]  Documenting rw-2 v0.0.1 (/opt/rustwide/workdir/librw-2)
[INFO] [stderr]  Documenting rw-1 v0.0.1 (/opt/rustwide/workdir/librw-1)
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stdout]  --> librw-2/src/lib.rs:2:1
[INFO] [stdout]   |
[INFO] [stdout] 2 | #![feature(lang_items)]
[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 `rw-2`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustdoc --edition=2021 --crate-type cdylib --crate-name rw_2 librw-2/src/lib.rs -o /opt/rustwide/target/doc --error-format=json --json=diagnostic-rendered-ansi,artifacts,future-incompat --document-private-items -C metadata=793ea2f0ec43c58e -L dependency=/opt/rustwide/target/debug/deps --extern libc=/opt/rustwide/target/debug/deps/liblibc-a7f49f9b3f9be833.rmeta --extern nix=/opt/rustwide/target/debug/deps/libnix-094ed11cd2007c37.rmeta --cap-lints=warn --crate-version 0.0.1` (exit status: 1)
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] running `Command { std: "docker" "inspect" "31646a3fa64baecec1acc134689291950497378a1c8a849151da9adbc5f8f2d5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "31646a3fa64baecec1acc134689291950497378a1c8a849151da9adbc5f8f2d5", kill_on_drop: false }`
[INFO] [stdout] 31646a3fa64baecec1acc134689291950497378a1c8a849151da9adbc5f8f2d5
