[INFO] fetching crate relp 0.2.3...
[INFO] documenting relp-0.2.3 against 1.61.0 for beta-1.62-rustdoc-1
[INFO] extracting crate relp 0.2.3 into /workspace/builds/worker-30/source
[INFO] validating manifest of crates.io crate relp 0.2.3 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 relp 0.2.3
[INFO] finished tweaking crates.io crate relp 0.2.3
[INFO] tweaked toml for crates.io crate relp 0.2.3 written to /workspace/builds/worker-30/source/Cargo.toml
[INFO] crate crates.io crate relp 0.2.3 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]  Downloading crates ...
[INFO] [stderr]   Downloaded enum-map-derive v0.6.0
[INFO] [stderr]   Downloaded enum-map v1.1.1
[INFO] [stderr]   Downloaded daggy v0.8.0
[INFO] [stderr]   Downloaded relp-num v0.1.10
[INFO] [stderr]   Downloaded cumsum v1.0.0
[INFO] [stderr]   Downloaded fifo-set v1.0.0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-30/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-30/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] d502f138fc28a6b6471df15ac56fe1a5b0baa87596741a67c03f19b936cbf20c
[INFO] running `Command { std: "docker" "start" "-a" "d502f138fc28a6b6471df15ac56fe1a5b0baa87596741a67c03f19b936cbf20c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "d502f138fc28a6b6471df15ac56fe1a5b0baa87596741a67c03f19b936cbf20c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d502f138fc28a6b6471df15ac56fe1a5b0baa87596741a67c03f19b936cbf20c", kill_on_drop: false }`
[INFO] [stdout] d502f138fc28a6b6471df15ac56fe1a5b0baa87596741a67c03f19b936cbf20c
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-30/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-30/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] bae74227f44fe9369274b60e5f35c9c25f1bf47954bb7a9defb7f01b51c3f6b7
[INFO] running `Command { std: "docker" "start" "-a" "bae74227f44fe9369274b60e5f35c9c25f1bf47954bb7a9defb7f01b51c3f6b7", kill_on_drop: false }`
[INFO] [stderr]    Compiling autocfg v1.0.1
[INFO] [stderr]    Compiling proc-macro2 v1.0.26
[INFO] [stderr]    Compiling unicode-xid v0.2.2
[INFO] [stderr]    Compiling syn v1.0.72
[INFO] [stderr]    Compiling cc v1.0.72
[INFO] [stderr]     Checking fixedbitset v0.4.0
[INFO] [stderr]     Checking either v1.6.1
[INFO] [stderr]     Checking smallvec v1.7.0
[INFO] [stderr]     Checking gcd v2.0.1
[INFO] [stderr]     Checking fifo-set v1.0.0
[INFO] [stderr]     Checking cumsum v1.0.0
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]   --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/smallvec-1.7.0/src/lib.rs:82:41
[INFO] [stdout]    |
[INFO] [stdout] 82 | #![cfg_attr(feature = "specialization", feature(specialization))]
[INFO] [stdout]    |                                         ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Checking itertools v0.10.3
[INFO] [stderr] error: could not compile `smallvec` due to 2 previous errors
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[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] running `Command { std: "docker" "inspect" "bae74227f44fe9369274b60e5f35c9c25f1bf47954bb7a9defb7f01b51c3f6b7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "bae74227f44fe9369274b60e5f35c9c25f1bf47954bb7a9defb7f01b51c3f6b7", kill_on_drop: false }`
[INFO] [stdout] bae74227f44fe9369274b60e5f35c9c25f1bf47954bb7a9defb7f01b51c3f6b7