[INFO] fetching crate bls12_381_ietf 0.1.3...
[INFO] documenting bls12_381_ietf-0.1.3 against 1.61.0 for beta-1.62-rustdoc-1
[INFO] extracting crate bls12_381_ietf 0.1.3 into /workspace/builds/worker-34/source
[INFO] validating manifest of crates.io crate bls12_381_ietf 0.1.3 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 crates.io crate bls12_381_ietf 0.1.3
[INFO] finished tweaking crates.io crate bls12_381_ietf 0.1.3
[INFO] tweaked toml for crates.io crate bls12_381_ietf 0.1.3 written to /workspace/builds/worker-34/source/Cargo.toml
[INFO] crate crates.io crate bls12_381_ietf 0.1.3 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]  Downloading crates ...
[INFO] [stderr]   Downloaded sha2 v0.8.1
[INFO] [stderr]   Downloaded ff_derive_ce v0.7.0
[INFO] [stderr]   Downloaded ff_ce v0.9.0
[INFO] [stderr]   Downloaded pairing_ce v0.20.0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-34/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-34/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] a5a9641266a8f08379a7dd4be7e0f184020513080c758cb04f06c77d878b1933
[INFO] running `Command { std: "docker" "start" "-a" "a5a9641266a8f08379a7dd4be7e0f184020513080c758cb04f06c77d878b1933", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "a5a9641266a8f08379a7dd4be7e0f184020513080c758cb04f06c77d878b1933", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a5a9641266a8f08379a7dd4be7e0f184020513080c758cb04f06c77d878b1933", kill_on_drop: false }`
[INFO] [stdout] a5a9641266a8f08379a7dd4be7e0f184020513080c758cb04f06c77d878b1933
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-34/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-34/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] 2440482b50175b0a681a86a06e4763aac5f4240da4cfaa4cfbf0662e11276127
[INFO] running `Command { std: "docker" "start" "-a" "2440482b50175b0a681a86a06e4763aac5f4240da4cfaa4cfbf0662e11276127", kill_on_drop: false }`
[INFO] [stderr]    Compiling autocfg v1.0.0
[INFO] [stderr]    Compiling typenum v1.11.2
[INFO] [stderr]    Compiling proc-macro2 v1.0.10
[INFO] [stderr]    Compiling byteorder v1.3.4
[INFO] [stderr]    Compiling unicode-xid v0.2.0
[INFO] [stderr]    Compiling syn v1.0.17
[INFO] [stderr]    Compiling libc v0.2.68
[INFO] [stderr]     Checking byte-tools v0.3.1
[INFO] [stderr]     Checking subtle v1.0.0
[INFO] [stderr]     Checking hex v0.4.2
[INFO] [stderr]     Checking opaque-debug v0.2.3
[INFO] [stderr]     Checking fake-simd v0.1.2
[INFO] [stderr]     Checking spin v0.5.2
[INFO] [stderr]     Checking block-padding v0.1.5
[INFO] [stderr]     Checking lazy_static v1.4.0
[INFO] [stderr]    Compiling num-traits v0.2.11
[INFO] [stderr]    Compiling num-integer v0.1.42
[INFO] [stderr]    Compiling num-bigint v0.2.6
[INFO] [stderr]    Compiling quote v1.0.3
[INFO] [stderr]     Checking rand v0.4.6
[INFO] [stderr]     Checking generic-array v0.12.3
[INFO] [stderr]     Checking digest v0.8.1
[INFO] [stderr]     Checking crypto-mac v0.7.0
[INFO] [stderr]     Checking block-buffer v0.7.3
[INFO] [stderr]     Checking hmac v0.7.1
[INFO] [stderr]     Checking sha2 v0.8.1
[INFO] [stderr]     Checking hkdf v0.8.0
[INFO] [stderr]    Compiling ff_derive_ce v0.7.0
[INFO] [stderr]     Checking ff_ce v0.9.0
[INFO] [stderr]     Checking pairing_ce v0.20.0
[INFO] [stderr]  Documenting bls12_381_ietf v0.1.3 (/opt/rustwide/workdir)
[INFO] [stderr] error: could not document `bls12_381_ietf`
[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] [stderr] 
[INFO] [stdout] error: aborting due to previous error
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] Caused by:
[INFO] [stdout] For more information about this error, try `rustc --explain E0554`.
[INFO] [stdout] 
[INFO] [stderr]   process didn't exit successfully: `rustdoc --edition=2018 --crate-type lib --crate-name bls12_381_ietf src/lib.rs -o /opt/rustwide/target/doc --error-format=json --json=diagnostic-rendered-ansi,artifacts,future-incompat --document-private-items -C metadata=b7d84a38ffb08f2f -L dependency=/opt/rustwide/target/debug/deps --extern hex=/opt/rustwide/target/debug/deps/libhex-4abae1b12f6de210.rmeta --extern hkdf=/opt/rustwide/target/debug/deps/libhkdf-197410bf24d1c821.rmeta --extern lazy_static=/opt/rustwide/target/debug/deps/liblazy_static-ed3ba279ce80868a.rmeta --extern num_bigint=/opt/rustwide/target/debug/deps/libnum_bigint-f434c32c780f306c.rmeta --extern num_traits=/opt/rustwide/target/debug/deps/libnum_traits-ae9ae1d7ab84af61.rmeta --extern pairing=/opt/rustwide/target/debug/deps/libpairing_ce-10d027c233e4bdcf.rmeta --extern sha2=/opt/rustwide/target/debug/deps/libsha2-395d767d0d7d1005.rmeta --cap-lints=warn --crate-version 0.1.3` (exit status: 1)
[INFO] running `Command { std: "docker" "inspect" "2440482b50175b0a681a86a06e4763aac5f4240da4cfaa4cfbf0662e11276127", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "2440482b50175b0a681a86a06e4763aac5f4240da4cfaa4cfbf0662e11276127", kill_on_drop: false }`
[INFO] [stdout] 2440482b50175b0a681a86a06e4763aac5f4240da4cfaa4cfbf0662e11276127