[INFO] cloning repository https://github.com/Chriscbr/rustgen_test
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/Chriscbr/rustgen_test" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FChriscbr%2Frustgen_test", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FChriscbr%2Frustgen_test'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] b2b4ffc1d576fd60c253a59c4f082b76582667d8
[INFO] documenting Chriscbr/rustgen_test against 1.75.0 for beta-1.76-rustdoc-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FChriscbr%2Frustgen_test" "/workspace/builds/worker-3-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-3-tc1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/Chriscbr/rustgen_test on toolchain 1.75.0
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.75.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/Chriscbr/rustgen_test
[INFO] finished tweaking git repo https://github.com/Chriscbr/rustgen_test
[INFO] tweaked toml for git repo https://github.com/Chriscbr/rustgen_test written to /workspace/builds/worker-3-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/Chriscbr/rustgen_test 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" "+1.75.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded either v1.5.1
[INFO] [stderr]   Downloaded jobserver v0.1.12
[INFO] [stderr]   Downloaded rand_jitter v0.1.3
[INFO] [stderr]   Downloaded byteorder v1.3.1
[INFO] [stderr]   Downloaded autocfg v0.1.2
[INFO] [stderr]   Downloaded rustc-hash v1.0.1
[INFO] [stderr]   Downloaded num_cpus v1.10.0
[INFO] [stderr]   Downloaded smallvec v0.6.9
[INFO] [stderr]   Downloaded rustc-ap-rustc_cratesio_shim v401.0.0
[INFO] [stderr]   Downloaded rustc-ap-graphviz v401.0.0
[INFO] [stderr]   Downloaded rustc-ap-arena v401.0.0
[INFO] [stderr]   Downloaded rustc-ap-rustc_target v401.0.0
[INFO] [stderr]   Downloaded rustc-ap-serialize v401.0.0
[INFO] [stderr]   Downloaded rustc-rayon-core v0.1.2
[INFO] [stderr]   Downloaded rustc-ap-syntax_pos v401.0.0
[INFO] [stderr]   Downloaded rustc-ap-rustc_errors v401.0.0
[INFO] [stderr]   Downloaded rustc-rayon v0.1.2
[INFO] [stderr]   Downloaded rustc-ap-rustc_data_structures v401.0.0
[INFO] [stderr]   Downloaded rustc-ap-syntax v401.0.0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc1/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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+1.75.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 47c5e19d8551173ab9458c00881cc5d92fe619f16d99341e8091628564256183
[INFO] running `Command { std: "docker" "start" "-a" "47c5e19d8551173ab9458c00881cc5d92fe619f16d99341e8091628564256183", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "47c5e19d8551173ab9458c00881cc5d92fe619f16d99341e8091628564256183", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "47c5e19d8551173ab9458c00881cc5d92fe619f16d99341e8091628564256183", kill_on_drop: false }`
[INFO] [stdout] 47c5e19d8551173ab9458c00881cc5d92fe619f16d99341e8091628564256183
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc1/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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+1.75.0" "doc" "--frozen" "--no-deps" "--document-private-items" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 0eeaf8503b47665549090011ef4de10e5edc71315dd0f9fa1cfce45b048f2bfe
[INFO] running `Command { std: "docker" "start" "-a" "0eeaf8503b47665549090011ef4de10e5edc71315dd0f9fa1cfce45b048f2bfe", kill_on_drop: false }`
[INFO] [stderr]     Checking rand_core v0.4.0
[INFO] [stderr]    Compiling libc v0.2.50
[INFO] [stderr]    Compiling autocfg v0.1.2
[INFO] [stderr]     Checking cfg-if v0.1.7
[INFO] [stderr]    Compiling semver-parser v0.7.0
[INFO] [stderr]    Compiling arrayvec v0.4.10
[INFO] [stderr]     Checking scopeguard v0.3.3
[INFO] [stderr]     Checking nodrop v0.1.13
[INFO] [stderr]     Checking crossbeam-utils v0.2.2
[INFO] [stderr]     Checking lazy_static v1.3.0
[INFO] [stderr]     Checking memoffset v0.2.1
[INFO] [stderr]     Checking log v0.4.6
[INFO] [stderr]     Checking smallvec v0.6.9
[INFO] [stderr]    Compiling semver v0.9.0
[INFO] [stderr]     Checking rand_core v0.3.1
[INFO] [stdout] error[E0557]: feature has been removed
[INFO] [stdout]   --> /opt/rustwide/cargo-home/registry/src/index.crates.io-6f17d22bba15001f/smallvec-0.6.9/lib.rs:33:40
[INFO] [stdout]    |
[INFO] [stdout] 33 | #![cfg_attr(feature = "union", feature(untagged_unions))]
[INFO] [stdout]    |                                        ^^^^^^^^^^^^^^^ feature has been removed
[INFO] [stdout]    |
[INFO] [stdout]    = note: unions with `Copy` and `ManuallyDrop` fields are stable; there is no intent to stabilize more
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]   --> /opt/rustwide/cargo-home/registry/src/index.crates.io-6f17d22bba15001f/smallvec-0.6.9/lib.rs:33:32
[INFO] [stdout]    |
[INFO] [stdout] 33 | #![cfg_attr(feature = "union", feature(untagged_unions))]
[INFO] [stdout]    |                                ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]   --> /opt/rustwide/cargo-home/registry/src/index.crates.io-6f17d22bba15001f/smallvec-0.6.9/lib.rs:35:37
[INFO] [stdout]    |
[INFO] [stdout] 35 | #![cfg_attr(feature = "may_dangle", feature(dropck_eyepatch))]
[INFO] [stdout]    |                                     ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Checking rand_jitter v0.1.3
[INFO] [stderr]     Checking rand_hc v0.1.0
[INFO] [stdout] error: aborting due to 3 previous errors
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] Some errors have detailed explanations: E0554, E0557.
[INFO] [stdout] 
[INFO] [stdout] For more information about an error, try `rustc --explain E0554`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `smallvec` (lib) due to 4 previous errors
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] running `Command { std: "docker" "inspect" "0eeaf8503b47665549090011ef4de10e5edc71315dd0f9fa1cfce45b048f2bfe", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "0eeaf8503b47665549090011ef4de10e5edc71315dd0f9fa1cfce45b048f2bfe", kill_on_drop: false }`
[INFO] [stdout] 0eeaf8503b47665549090011ef4de10e5edc71315dd0f9fa1cfce45b048f2bfe
