[INFO] fetching crate dochy_archiver2 0.10.1...
[INFO] documenting dochy_archiver2-0.10.1 against 1.75.0 for beta-1.76-rustdoc-1
[INFO] extracting crate dochy_archiver2 0.10.1 into /workspace/builds/worker-2-tc1/source
[INFO] validating manifest of crates.io crate dochy_archiver2 0.10.1 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 crates.io crate dochy_archiver2 0.10.1
[INFO] finished tweaking crates.io crate dochy_archiver2 0.10.1
[INFO] tweaked toml for crates.io crate dochy_archiver2 0.10.1 written to /workspace/builds/worker-2-tc1/source/Cargo.toml
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.75.0" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[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]  Downloading crates ...
[INFO] [stderr]   Downloaded with_capacity_safe v0.4.2
[INFO] [stderr]   Downloaded metrohash v1.0.6
[INFO] [stderr]   Downloaded dochy_compaction v0.10.1
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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] 530fca25f8c24b59a042f9522a8ae12368af4487f2ce0648316000ff016b75be
[INFO] running `Command { std: "docker" "start" "-a" "530fca25f8c24b59a042f9522a8ae12368af4487f2ce0648316000ff016b75be", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "530fca25f8c24b59a042f9522a8ae12368af4487f2ce0648316000ff016b75be", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "530fca25f8c24b59a042f9522a8ae12368af4487f2ce0648316000ff016b75be", kill_on_drop: false }`
[INFO] [stdout] 530fca25f8c24b59a042f9522a8ae12368af4487f2ce0648316000ff016b75be
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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] 83feb07e02199036d04545f6d2d97eeab30edda437624dfb13cf7c1a2cd3974d
[INFO] running `Command { std: "docker" "start" "-a" "83feb07e02199036d04545f6d2d97eeab30edda437624dfb13cf7c1a2cd3974d", kill_on_drop: false }`
[INFO] [stderr]    Compiling snap v1.1.1
[INFO] [stderr]     Checking with_capacity_safe v0.4.2
[INFO] [stderr]     Checking bit-vec v0.6.3
[INFO] [stderr]     Checking arrayvec v0.5.2
[INFO] [stderr]     Checking metrohash v1.0.6
[INFO] [stderr]     Checking dochy_compaction v0.10.1
[INFO] [stderr]  Documenting dochy_archiver2 v0.10.1 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]  --> src/lib.rs:1:12
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(test)]
[INFO] [stdout]   |            ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]  --> src/lib.rs:2:12
[INFO] [stdout]   |
[INFO] [stdout] 2 | #![feature(once_cell)]
[INFO] [stdout]   |            ^^^^^^^^^
[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 `dochy_archiver2`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `/opt/rustwide/rustup-home/toolchains/1.75.0-x86_64-unknown-linux-gnu/bin/rustdoc --edition=2018 --crate-type lib --crate-name dochy_archiver2 src/lib.rs -o /opt/rustwide/target/doc --error-format=json --json=diagnostic-rendered-ansi,artifacts,future-incompat --document-private-items -C metadata=5f8725433f1859aa -L dependency=/opt/rustwide/target/debug/deps --extern anyhow=/opt/rustwide/target/debug/deps/libanyhow-fd85f3ee78419db7.rmeta --extern dochy_compaction=/opt/rustwide/target/debug/deps/libdochy_compaction-ddfa08c7a98a13e6.rmeta --extern metrohash=/opt/rustwide/target/debug/deps/libmetrohash-fc2a94294d3d53d0.rmeta --extern rayon=/opt/rustwide/target/debug/deps/librayon-030b27e0bc6cc4e7.rmeta --extern snap=/opt/rustwide/target/debug/deps/libsnap-e2c09e4c343ee497.rmeta --extern with_capacity_safe=/opt/rustwide/target/debug/deps/libwith_capacity_safe-f3773bf682d92143.rmeta --cap-lints=warn --crate-version 0.10.1` (exit status: 1)
[INFO] running `Command { std: "docker" "inspect" "83feb07e02199036d04545f6d2d97eeab30edda437624dfb13cf7c1a2cd3974d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "83feb07e02199036d04545f6d2d97eeab30edda437624dfb13cf7c1a2cd3974d", kill_on_drop: false }`
[INFO] [stdout] 83feb07e02199036d04545f6d2d97eeab30edda437624dfb13cf7c1a2cd3974d
