[INFO] cloning repository https://github.com/alec-deason/virtual_modular
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/alec-deason/virtual_modular" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Falec-deason%2Fvirtual_modular", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Falec-deason%2Fvirtual_modular'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 77857488c4b573522807430855c83bfc3d588647
[INFO] documenting alec-deason/virtual_modular 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%2Falec-deason%2Fvirtual_modular" "/workspace/builds/worker-6-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-6-tc2/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/alec-deason/virtual_modular 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/alec-deason/virtual_modular
[INFO] finished tweaking git repo https://github.com/alec-deason/virtual_modular
[INFO] tweaked toml for git repo https://github.com/alec-deason/virtual_modular written to /workspace/builds/worker-6-tc2/source/Cargo.toml
[INFO] crate git repo https://github.com/alec-deason/virtual_modular 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] [stderr]     Updating crates.io index
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded pom v3.2.0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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] 254bf8cea98200a237afc26ab69d4715c426c6fa22737242718c1a56bcbede2d
[INFO] running `Command { std: "docker" "start" "-a" "254bf8cea98200a237afc26ab69d4715c426c6fa22737242718c1a56bcbede2d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "254bf8cea98200a237afc26ab69d4715c426c6fa22737242718c1a56bcbede2d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "254bf8cea98200a237afc26ab69d4715c426c6fa22737242718c1a56bcbede2d", kill_on_drop: false }`
[INFO] [stdout] 254bf8cea98200a237afc26ab69d4715c426c6fa22737242718c1a56bcbede2d
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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] 87e9b7c16398c829d8bbb34780d3d54bee0798102d198f2353d119214e18bd94
[INFO] running `Command { std: "docker" "start" "-a" "87e9b7c16398c829d8bbb34780d3d54bee0798102d198f2353d119214e18bd94", kill_on_drop: false }`
[INFO] [stderr]     Checking dyn-clone v1.0.4
[INFO] [stderr]    Compiling generic-array v0.14.4
[INFO] [stderr]     Checking virtual_modular_graph v0.1.0 (/opt/rustwide/workdir/graph)
[INFO] [stderr]  Documenting virtual_modular v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stdout]  --> src/lib.rs:1:12
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(hash_drain_filter)]
[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 `virtual_modular`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustdoc --edition=2021 --crate-type lib --crate-name virtual_modular src/lib.rs -o /opt/rustwide/target/doc --error-format=json --json=diagnostic-rendered-ansi,artifacts,future-incompat --document-private-items -C metadata=a374c721a9199276 -L dependency=/opt/rustwide/target/debug/deps --extern dyn_clone=/opt/rustwide/target/debug/deps/libdyn_clone-d813cd746de92504.rmeta --extern generic_array=/opt/rustwide/target/debug/deps/libgeneric_array-7a175e4927237b29.rmeta --extern typenum=/opt/rustwide/target/debug/deps/libtypenum-42a67990a44f31be.rmeta --extern virtual_modular_graph=/opt/rustwide/target/debug/deps/libvirtual_modular_graph-7f634569dfe4124f.rmeta --cap-lints=warn --crate-version 0.1.0` (exit status: 1)
[INFO] running `Command { std: "docker" "inspect" "87e9b7c16398c829d8bbb34780d3d54bee0798102d198f2353d119214e18bd94", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "87e9b7c16398c829d8bbb34780d3d54bee0798102d198f2353d119214e18bd94", kill_on_drop: false }`
[INFO] [stdout] 87e9b7c16398c829d8bbb34780d3d54bee0798102d198f2353d119214e18bd94
