[INFO] cloning repository https://github.com/algon-320/toyterm
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/algon-320/toyterm" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Falgon-320%2Ftoyterm", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Falgon-320%2Ftoyterm'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 6719db022a50020b31e4002a76e89eec274dfdb6
[INFO] documenting algon-320/toyterm against beta-2022-05-20 for beta-1.62-rustdoc-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Falgon-320%2Ftoyterm" "/workspace/builds/worker-16/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-16/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/algon-320/toyterm on toolchain beta-2022-05-20
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2022-05-20" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/algon-320/toyterm
[INFO] finished tweaking git repo https://github.com/algon-320/toyterm
[INFO] tweaked toml for git repo https://github.com/algon-320/toyterm written to /workspace/builds/worker-16/source/Cargo.toml
[INFO] crate git repo https://github.com/algon-320/toyterm already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2022-05-20" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-16/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-16/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" "+beta-2022-05-20" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] c950749dd6eb84c3bd26234cea6a2f5a7e8b3296a069c110b73d74cd7233f8d9
[INFO] running `Command { std: "docker" "start" "-a" "c950749dd6eb84c3bd26234cea6a2f5a7e8b3296a069c110b73d74cd7233f8d9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "c950749dd6eb84c3bd26234cea6a2f5a7e8b3296a069c110b73d74cd7233f8d9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c950749dd6eb84c3bd26234cea6a2f5a7e8b3296a069c110b73d74cd7233f8d9", kill_on_drop: false }`
[INFO] [stdout] c950749dd6eb84c3bd26234cea6a2f5a7e8b3296a069c110b73d74cd7233f8d9
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-16/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-16/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" "+beta-2022-05-20" "doc" "--frozen" "--no-deps" "--document-private-items" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] a7e092c3666c77fbaf65efd19804faa7673b4594a88c03c95e542061c619df43
[INFO] running `Command { std: "docker" "start" "-a" "a7e092c3666c77fbaf65efd19804faa7673b4594a88c03c95e542061c619df43", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.87
[INFO] [stderr]    Compiling memchr v2.3.4
[INFO] [stderr]    Compiling version-compare v0.0.10
[INFO] [stderr]    Compiling serde v1.0.123
[INFO] [stderr]     Checking regex-syntax v0.6.22
[INFO] [stderr]    Compiling lexical-core v0.7.5
[INFO] [stderr]    Compiling log v0.4.14
[INFO] [stderr]    Compiling version_check v0.9.2
[INFO] [stderr]     Checking arrayvec v0.5.2
[INFO] [stderr]    Compiling sdl2 v0.34.3
[INFO] [stderr]    Compiling anyhow v1.0.38
[INFO] [stderr]     Checking const-cstr v0.3.0
[INFO] [stderr]     Checking humantime v2.1.0
[INFO] [stderr]     Checking termcolor v1.1.2
[INFO] [stderr]     Checking ucd v0.1.1
[INFO] [stderr]    Compiling num-traits v0.2.14
[INFO] [stderr]    Compiling num-integer v0.1.44
[INFO] [stderr]    Compiling num-iter v0.1.42
[INFO] [stderr]    Compiling num-rational v0.4.0
[INFO] [stderr]    Compiling yeslogic-fontconfig-sys v2.11.1
[INFO] [stderr]     Checking serde_test v0.8.23
[INFO] [stderr]     Checking yaml-rust v0.4.5
[INFO] [stderr]    Compiling sdl2-sys v0.34.3
[INFO] [stderr]    Compiling nom v5.1.2
[INFO] [stderr]     Checking linked-hash-map v0.3.0
[INFO] [stderr]     Checking sixel v0.1.0 (/opt/rustwide/workdir/sixel)
[INFO] [stderr]     Checking aho-corasick v0.7.15
[INFO] [stderr]     Checking num-traits v0.1.43
[INFO] [stderr]     Checking num-complex v0.4.0
[INFO] [stderr]     Checking regex v1.4.3
[INFO] [stderr]     Checking atty v0.2.14
[INFO] [stderr]     Checking nix v0.20.0
[INFO] [stderr]     Checking fontconfig v0.2.0
[INFO] [stderr]     Checking num v0.4.0
[INFO] [stderr]     Checking serde-hjson v0.9.1
[INFO] [stderr]     Checking env_logger v0.8.3
[INFO] [stderr]     Checking serde_json v1.0.64
[INFO] [stderr]     Checking toml v0.5.8
[INFO] [stderr]     Checking config v0.10.1
[INFO] [stderr]  Documenting toyterm v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stdout]  --> src/main.rs:1:12
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(step_trait)]
[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 `toyterm`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustdoc --edition=2018 --crate-type bin --crate-name toyterm src/main.rs -o /opt/rustwide/target/doc --error-format=json --json=diagnostic-rendered-ansi,artifacts,future-incompat --document-private-items '-Arustdoc::private-intra-doc-links' -C metadata=e362efd9a976af95 -L dependency=/opt/rustwide/target/debug/deps --extern anyhow=/opt/rustwide/target/debug/deps/libanyhow-bb8eae36d788d448.rmeta --extern config=/opt/rustwide/target/debug/deps/libconfig-b7ec009112cd6edc.rmeta --extern env_logger=/opt/rustwide/target/debug/deps/libenv_logger-ea346d761dc4ee4c.rmeta --extern fontconfig=/opt/rustwide/target/debug/deps/libfontconfig-7509dfe8c79bf511.rmeta --extern lazy_static=/opt/rustwide/target/debug/deps/liblazy_static-701e134f05ff346a.rmeta --extern log=/opt/rustwide/target/debug/deps/liblog-a4d07564fcf3ef45.rmeta --extern nix=/opt/rustwide/target/debug/deps/libnix-64644104e1e52c80.rmeta --extern num=/opt/rustwide/target/debug/deps/libnum-9502591dbb2dcc23.rmeta --extern sdl2=/opt/rustwide/target/debug/deps/libsdl2-41cb805eb61257db.rmeta --extern sixel=/opt/rustwide/target/debug/deps/libsixel-f39845ade2a994a2.rmeta --extern ucd=/opt/rustwide/target/debug/deps/libucd-cf75389808928d75.rmeta --cap-lints=warn --crate-version 0.1.0` (exit status: 1)
[INFO] running `Command { std: "docker" "inspect" "a7e092c3666c77fbaf65efd19804faa7673b4594a88c03c95e542061c619df43", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a7e092c3666c77fbaf65efd19804faa7673b4594a88c03c95e542061c619df43", kill_on_drop: false }`
[INFO] [stdout] a7e092c3666c77fbaf65efd19804faa7673b4594a88c03c95e542061c619df43