[INFO] cloning repository https://github.com/Nopey/fastkv-rs
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/Nopey/fastkv-rs" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FNopey%2Ffastkv-rs", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FNopey%2Ffastkv-rs'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 994e373aa4d0b4e44df66a932a908a5a0c056258
[INFO] documenting Nopey/fastkv-rs 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%2FNopey%2Ffastkv-rs" "/workspace/builds/worker-10/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-10/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/Nopey/fastkv-rs 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/Nopey/fastkv-rs
[INFO] finished tweaking git repo https://github.com/Nopey/fastkv-rs
[INFO] tweaked toml for git repo https://github.com/Nopey/fastkv-rs written to /workspace/builds/worker-10/source/Cargo.toml
[INFO] crate git repo https://github.com/Nopey/fastkv-rs 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]  Downloading crates ...
[INFO] [stderr]   Downloaded jemallocator v0.3.2
[INFO] [stderr]   Downloaded fs_extra v1.1.0
[INFO] [stderr]   Downloaded jemalloc-sys v0.3.2
[INFO] [stderr]   Downloaded persist-o-vec v0.3.0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-10/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-10/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] d6c7b8571cc08a1efea3b37e8b7e145d78d5945acb4570eda41617a873ebb286
[INFO] running `Command { std: "docker" "start" "-a" "d6c7b8571cc08a1efea3b37e8b7e145d78d5945acb4570eda41617a873ebb286", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "d6c7b8571cc08a1efea3b37e8b7e145d78d5945acb4570eda41617a873ebb286", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d6c7b8571cc08a1efea3b37e8b7e145d78d5945acb4570eda41617a873ebb286", kill_on_drop: false }`
[INFO] [stdout] d6c7b8571cc08a1efea3b37e8b7e145d78d5945acb4570eda41617a873ebb286
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-10/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-10/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] d73e70347f57d7da2ff15d0578c6e604653d551ff534cd9d4326b9d521b897c1
[INFO] running `Command { std: "docker" "start" "-a" "d73e70347f57d7da2ff15d0578c6e604653d551ff534cd9d4326b9d521b897c1", kill_on_drop: false }`
[INFO] [stderr]    Compiling cc v1.0.54
[INFO] [stderr]    Compiling fs_extra v1.1.0
[INFO] [stderr]    Compiling libc v0.2.71
[INFO] [stderr]     Checking persist-o-vec v0.3.0
[INFO] [stderr]    Compiling jemalloc-sys v0.3.2
[INFO] [stderr]     Checking jemallocator v0.3.2
[INFO] [stderr]  Documenting fastkv-rs v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]  --> src/main.rs:1:12
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(const_transmute)]
[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 `fastkv-rs`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustdoc --edition=2018 --crate-type bin --crate-name fastkv_rs src/main.rs -o /opt/rustwide/target/doc --cfg 'feature="conditions"' --cfg 'feature="default"' --error-format=json --json=diagnostic-rendered-ansi,artifacts,future-incompat --document-private-items -C metadata=ea5dbb7f6de838db -L dependency=/opt/rustwide/target/debug/deps --extern jemallocator=/opt/rustwide/target/debug/deps/libjemallocator-2bc02e1941670239.rmeta --extern libc=/opt/rustwide/target/debug/deps/liblibc-0cdba2c1ae366626.rmeta --extern persist_o_vec=/opt/rustwide/target/debug/deps/libpersist_o_vec-2fb5836808d342f1.rmeta --cap-lints=warn --crate-version 0.1.0` (exit status: 1)
[INFO] running `Command { std: "docker" "inspect" "d73e70347f57d7da2ff15d0578c6e604653d551ff534cd9d4326b9d521b897c1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d73e70347f57d7da2ff15d0578c6e604653d551ff534cd9d4326b9d521b897c1", kill_on_drop: false }`
[INFO] [stdout] d73e70347f57d7da2ff15d0578c6e604653d551ff534cd9d4326b9d521b897c1