[INFO] fetching crate autocall 0.1.6...
[INFO] documenting autocall-0.1.6 against 1.61.0 for beta-1.62-rustdoc-1
[INFO] extracting crate autocall 0.1.6 into /workspace/builds/worker-1/source
[INFO] validating manifest of crates.io crate autocall 0.1.6 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 autocall 0.1.6
[INFO] finished tweaking crates.io crate autocall 0.1.6
[INFO] tweaked toml for crates.io crate autocall 0.1.6 written to /workspace/builds/worker-1/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.61.0" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[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 unsafe-any v0.4.2
[INFO] [stderr]   Downloaded log4rs v1.1.1
[INFO] [stderr]   Downloaded arc-swap v1.5.0
[INFO] [stderr]   Downloaded log-mdc v0.1.0
[INFO] [stderr]   Downloaded thread-id v4.0.0
[INFO] [stderr]   Downloaded typemap v0.3.3
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/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] 77e4860b4c55a52352b41402cbcbec35ace4c0d0d87e4cd77432eb505786efd2
[INFO] running `Command { std: "docker" "start" "-a" "77e4860b4c55a52352b41402cbcbec35ace4c0d0d87e4cd77432eb505786efd2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "77e4860b4c55a52352b41402cbcbec35ace4c0d0d87e4cd77432eb505786efd2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "77e4860b4c55a52352b41402cbcbec35ace4c0d0d87e4cd77432eb505786efd2", kill_on_drop: false }`
[INFO] [stdout] 77e4860b4c55a52352b41402cbcbec35ace4c0d0d87e4cd77432eb505786efd2
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/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] 0d904e938882d87d23e098a7d92355ee2eb88242f0ab6d6d439b0499cb47c0ec
[INFO] running `Command { std: "docker" "start" "-a" "0d904e938882d87d23e098a7d92355ee2eb88242f0ab6d6d439b0499cb47c0ec", kill_on_drop: false }`
[INFO] [stderr]    Compiling autocfg v1.1.0
[INFO] [stderr]    Compiling proc-macro2 v1.0.39
[INFO] [stderr]    Compiling unicode-ident v1.0.0
[INFO] [stderr]    Compiling syn v1.0.95
[INFO] [stderr]    Compiling libc v0.2.126
[INFO] [stderr]    Compiling serde_derive v1.0.137
[INFO] [stderr]    Compiling serde v1.0.137
[INFO] [stderr]    Compiling parking_lot_core v0.9.3
[INFO] [stderr]     Checking cfg-if v1.0.0
[INFO] [stderr]     Checking smallvec v1.8.0
[INFO] [stderr]     Checking scopeguard v1.1.0
[INFO] [stderr]     Checking traitobject v0.1.0
[INFO] [stderr]    Compiling serde_json v1.0.81
[INFO] [stderr]     Checking linked-hash-map v0.5.4
[INFO] [stderr]    Compiling anyhow v1.0.57
[INFO] [stderr]     Checking ryu v1.0.10
[INFO] [stderr]    Compiling log v0.4.17
[INFO] [stderr]     Checking hashbrown v0.11.2
[INFO] [stderr]     Checking hashbrown v0.12.1
[INFO] [stderr]     Checking itoa v1.0.2
[INFO] [stderr]     Checking arc-swap v1.5.0
[INFO] [stderr]     Checking fnv v1.0.7
[INFO] [stderr]     Checking log-mdc v0.1.0
[INFO] [stderr]     Checking once_cell v1.12.0
[INFO] [stderr]     Checking humantime v2.1.0
[INFO] [stderr]     Checking unsafe-any v0.4.2
[INFO] [stderr]     Checking yaml-rust v0.4.5
[INFO] [stderr]     Checking typemap v0.3.3
[INFO] [stderr]    Compiling num-traits v0.2.15
[INFO] [stderr]    Compiling lock_api v0.4.7
[INFO] [stderr]    Compiling indexmap v1.8.2
[INFO] [stderr]    Compiling num-integer v0.1.45
[INFO] [stderr]    Compiling quote v1.0.18
[INFO] [stderr]     Checking time v0.1.44
[INFO] [stderr]     Checking thread-id v4.0.0
[INFO] [stderr]     Checking parking_lot v0.12.0
[INFO] [stderr]     Checking dashmap v5.3.4
[INFO] [stderr]     Checking singlemap v0.1.5
[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/singlemap-0.1.5/src/lib.rs:1:1
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(trait_alias)]
[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 compile `singlemap` due to 2 previous errors
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] running `Command { std: "docker" "inspect" "0d904e938882d87d23e098a7d92355ee2eb88242f0ab6d6d439b0499cb47c0ec", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "0d904e938882d87d23e098a7d92355ee2eb88242f0ab6d6d439b0499cb47c0ec", kill_on_drop: false }`
[INFO] [stdout] 0d904e938882d87d23e098a7d92355ee2eb88242f0ab6d6d439b0499cb47c0ec