[INFO] fetching crate secp256kfun 0.6.1...
[INFO] documenting secp256kfun-0.6.1 against 1.54.0 for beta-1.55-rustdoc-1
[INFO] extracting crate secp256kfun 0.6.1 into /workspace/builds/worker-8/source
[INFO] validating manifest of crates.io crate secp256kfun 0.6.1 on toolchain 1.54.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.54.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate secp256kfun 0.6.1
[INFO] finished tweaking crates.io crate secp256kfun 0.6.1
[INFO] tweaked toml for crates.io crate secp256kfun 0.6.1 written to /workspace/builds/worker-8/source/Cargo.toml
[INFO] crate crates.io crate secp256kfun 0.6.1 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.54.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+1.54.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] bd1316fa9a81a33a3a263bc11d13efa83a25730eca40d0f8b97d25ef043ba848
[INFO] running `Command { std: "docker" "start" "-a" "bd1316fa9a81a33a3a263bc11d13efa83a25730eca40d0f8b97d25ef043ba848", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "bd1316fa9a81a33a3a263bc11d13efa83a25730eca40d0f8b97d25ef043ba848", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "bd1316fa9a81a33a3a263bc11d13efa83a25730eca40d0f8b97d25ef043ba848", kill_on_drop: false }`
[INFO] [stdout] bd1316fa9a81a33a3a263bc11d13efa83a25730eca40d0f8b97d25ef043ba848
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+1.54.0" "doc" "--frozen" "--no-deps" "--document-private-items" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] e7e5e1187b660958056d6d65b7eb61d5debc95f5ee39dfb36270efadd76f30c5
[INFO] running `Command { std: "docker" "start" "-a" "e7e5e1187b660958056d6d65b7eb61d5debc95f5ee39dfb36270efadd76f30c5", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.93
[INFO] [stderr]    Compiling subtle-ng v2.4.1
[INFO] [stderr]     Checking crunchy v0.2.2
[INFO] [stderr]    Compiling secp256kfun_parity_backend v0.1.5
[INFO] [stderr]     Checking getrandom v0.2.2
[INFO] [stderr]     Checking rand_core v0.6.2
[INFO] [stderr]    Compiling secp256kfun v0.6.1 (/opt/rustwide/workdir)
[INFO] [stderr]  Documenting secp256kfun v0.6.1 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]  --> src/lib.rs:2:1
[INFO] [stdout]   |
[INFO] [stdout] 2 | #![feature(rustc_attrs, min_specialization, extended_key_value_attributes)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = help: the feature `extended_key_value_attributes` has been stable since 1.54.0 and no longer requires an attribute to enable
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: Compilation failed, aborting rustdoc
[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 `secp256kfun`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustdoc --edition=2018 --crate-type lib --crate-name secp256kfun src/lib.rs -o /opt/rustwide/target/doc --cfg 'feature="alloc"' --cfg 'feature="default"' --cfg 'feature="std"' --error-format=json --json=diagnostic-rendered-ansi --document-private-items -L dependency=/opt/rustwide/target/debug/deps --extern digest=/opt/rustwide/target/debug/deps/libdigest-453a1e2f6793acb3.rmeta --extern rand_core=/opt/rustwide/target/debug/deps/librand_core-1c0a8d1fb7bd9f01.rmeta --extern secp256kfun_parity_backend=/opt/rustwide/target/debug/deps/libsecp256kfun_parity_backend-63ea07343a629606.rmeta --extern subtle=/opt/rustwide/target/debug/deps/libsubtle_ng-3a34646bc066ed8d.rmeta --cap-lints=warn --crate-version 0.6.1` (exit status: 1)
[INFO] running `Command { std: "docker" "inspect" "e7e5e1187b660958056d6d65b7eb61d5debc95f5ee39dfb36270efadd76f30c5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e7e5e1187b660958056d6d65b7eb61d5debc95f5ee39dfb36270efadd76f30c5", kill_on_drop: false }`
[INFO] [stdout] e7e5e1187b660958056d6d65b7eb61d5debc95f5ee39dfb36270efadd76f30c5
