[INFO] cloning repository https://github.com/toasterbag/rust-type-database
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/toasterbag/rust-type-database" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ftoasterbag%2Frust-type-database", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ftoasterbag%2Frust-type-database'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] f2670edbac0788d0eb57691191cc134286bf2762
[INFO] documenting toasterbag/rust-type-database against 1.61.0 for beta-1.62-rustdoc-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ftoasterbag%2Frust-type-database" "/workspace/builds/worker-7/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-7/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/toasterbag/rust-type-database on toolchain 1.61.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.61.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/toasterbag/rust-type-database
[INFO] finished tweaking git repo https://github.com/toasterbag/rust-type-database
[INFO] tweaked toml for git repo https://github.com/toasterbag/rust-type-database written to /workspace/builds/worker-7/source/Cargo.toml
[INFO] crate git repo https://github.com/toasterbag/rust-type-database already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.61.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded serde_derive v1.0.112
[INFO] [stderr]   Downloaded byteorder v1.3.4
[INFO] [stderr]   Downloaded bincode v1.2.1
[INFO] [stderr]   Downloaded syn v1.0.31
[INFO] [stderr]   Downloaded anyhow v1.0.31
[INFO] [stderr]   Downloaded serde v1.0.112
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/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" "+1.61.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 423edc469da0e4afe2a20c450a228bbc88e1975077a0fedc3d4ed0a2e0ea8580
[INFO] running `Command { std: "docker" "start" "-a" "423edc469da0e4afe2a20c450a228bbc88e1975077a0fedc3d4ed0a2e0ea8580", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "423edc469da0e4afe2a20c450a228bbc88e1975077a0fedc3d4ed0a2e0ea8580", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "423edc469da0e4afe2a20c450a228bbc88e1975077a0fedc3d4ed0a2e0ea8580", kill_on_drop: false }`
[INFO] [stdout] 423edc469da0e4afe2a20c450a228bbc88e1975077a0fedc3d4ed0a2e0ea8580
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/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" "+1.61.0" "doc" "--frozen" "--no-deps" "--document-private-items" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] c3673e03bae6fab804bc60bbd3e6fbb67a19f902b7ebe585c404a4a4a08341dc
[INFO] running `Command { std: "docker" "start" "-a" "c3673e03bae6fab804bc60bbd3e6fbb67a19f902b7ebe585c404a4a4a08341dc", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.18
[INFO] [stderr]    Compiling syn v1.0.31
[INFO] [stderr]    Compiling serde v1.0.112
[INFO] [stderr]    Compiling byteorder v1.3.4
[INFO] [stderr]    Compiling anyhow v1.0.31
[INFO] [stderr]    Compiling quote v1.0.7
[INFO] [stderr]    Compiling serde_derive v1.0.112
[INFO] [stderr]     Checking bincode v1.2.1
[INFO] [stderr]  Documenting rustdb v0.1.0 (/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: 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 `rustdb`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustdoc --edition=2018 --crate-type lib --crate-name rustdb src/lib.rs -o /opt/rustwide/target/doc --error-format=json --json=diagnostic-rendered-ansi,artifacts,future-incompat --document-private-items -C metadata=3263d6578239d86e -L dependency=/opt/rustwide/target/debug/deps --extern anyhow=/opt/rustwide/target/debug/deps/libanyhow-dbce760580586821.rmeta --extern bincode=/opt/rustwide/target/debug/deps/libbincode-f1f37bc6f41b92cc.rmeta --extern serde=/opt/rustwide/target/debug/deps/libserde-4af79753923cf2c7.rmeta --cap-lints=warn --crate-version 0.1.0` (exit status: 1)
[INFO] running `Command { std: "docker" "inspect" "c3673e03bae6fab804bc60bbd3e6fbb67a19f902b7ebe585c404a4a4a08341dc", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c3673e03bae6fab804bc60bbd3e6fbb67a19f902b7ebe585c404a4a4a08341dc", kill_on_drop: false }`
[INFO] [stdout] c3673e03bae6fab804bc60bbd3e6fbb67a19f902b7ebe585c404a4a4a08341dc