[INFO] fetching crate arendur 0.0.5...
[INFO] documenting arendur-0.0.5 against 1.61.0 for beta-1.62-rustdoc-1
[INFO] extracting crate arendur 0.0.5 into /workspace/builds/worker-70/source
[INFO] validating manifest of crates.io crate arendur 0.0.5 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 arendur 0.0.5
[INFO] removed 0 missing examples
[INFO] finished tweaking crates.io crate arendur 0.0.5
[INFO] tweaked toml for crates.io crate arendur 0.0.5 written to /workspace/builds/worker-70/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]     Blocking waiting for file lock on package cache
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded ucd-util v0.1.8
[INFO] [stderr]   Downloaded rayon v0.7.1
[INFO] [stderr]   Downloaded aren_alloc v0.2.1
[INFO] [stderr]   Downloaded enum_primitive v0.1.1
[INFO] [stderr]   Downloaded png v0.6.2
[INFO] [stderr]   Downloaded thread-id v3.3.0
[INFO] [stderr]   Downloaded regex-syntax v0.5.6
[INFO] [stderr]   Downloaded utf8-ranges v1.0.5
[INFO] [stderr]   Downloaded approx v0.1.1
[INFO] [stderr]   Downloaded aho-corasick v0.6.10
[INFO] [stderr]   Downloaded cgmath v0.14.1
[INFO] [stderr]   Downloaded gif v0.9.2
[INFO] [stderr]   Downloaded copy_arena v0.1.1
[INFO] [stderr]   Downloaded num-rational v0.1.42
[INFO] [stderr]   Downloaded image v0.12.4
[INFO] [stderr]   Downloaded inflate v0.1.1
[INFO] [stderr]   Downloaded deflate v0.7.20
[INFO] [stderr]   Downloaded regex v0.2.11
[INFO] [stderr]   Downloaded env_logger v0.4.3
[INFO] [stderr]   Downloaded lzw v0.10.0
[INFO] [stderr]   Downloaded tobj v0.1.12
[INFO] [stderr]   Downloaded flame v0.1.12
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-70/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-70/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] 9bb11821d0d0c7d7dd93bf730f0ca11a9c6b6985a5cc07badf02c1b90f6b7882
[INFO] running `Command { std: "docker" "start" "-a" "9bb11821d0d0c7d7dd93bf730f0ca11a9c6b6985a5cc07badf02c1b90f6b7882", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "9bb11821d0d0c7d7dd93bf730f0ca11a9c6b6985a5cc07badf02c1b90f6b7882", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "9bb11821d0d0c7d7dd93bf730f0ca11a9c6b6985a5cc07badf02c1b90f6b7882", kill_on_drop: false }`
[INFO] [stdout] 9bb11821d0d0c7d7dd93bf730f0ca11a9c6b6985a5cc07badf02c1b90f6b7882
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-70/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-70/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] bd6dc98271ce536918dd0e81c5cad24671ce5bd5cfe7b57db5a98f2e962e9e3f
[INFO] running `Command { std: "docker" "start" "-a" "bd6dc98271ce536918dd0e81c5cad24671ce5bd5cfe7b57db5a98f2e962e9e3f", kill_on_drop: false }`
[INFO] [stderr]    Compiling autocfg v1.1.0
[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/aren_alloc-0.2.1/src/lib.rs:31:12
[INFO] [stdout]    |
[INFO] [stdout] 31 | #![feature(coerce_unsized)]
[INFO] [stdout]    |            ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Checking cfg-if 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/aren_alloc-0.2.1/src/lib.rs:32:12
[INFO] [stdout]    |
[INFO] [stdout] 32 | #![feature(unsize)]
[INFO] [stdout]    |            ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]    Compiling libc v0.2.126
[INFO] [stderr]    Compiling crossbeam-utils v0.8.8
[INFO] [stderr]     Checking lazy_static v1.4.0
[INFO] [stderr]    Compiling rayon-core v1.9.3
[INFO] [stderr]     Checking scopeguard v1.1.0
[INFO] [stdout] error: aborting due to 2 previous errors
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]    Compiling proc-macro2 v1.0.39
[INFO] [stdout] For more information about this error, try `rustc --explain E0554`.
[INFO] [stdout] 
[INFO] [stderr]    Compiling unicode-ident v1.0.0
[INFO] [stderr]    Compiling syn v1.0.95
[INFO] [stderr]    Compiling serde v1.0.137
[INFO] [stderr]    Compiling log v0.4.17
[INFO] [stderr]    Compiling serde_derive v1.0.137
[INFO] [stderr]     Checking adler32 v1.2.0
[INFO] [stderr]     Checking byteorder v1.4.3
[INFO] [stderr]     Checking either v1.6.1
[INFO] [stderr]     Checking lzw v0.10.0
[INFO] [stderr]     Checking bitflags v0.7.0
[INFO] [stderr]     Checking color_quant v1.1.0
[INFO] [stderr]     Checking inflate v0.1.1
[INFO] [stderr]     Checking scoped_threadpool v0.1.9
[INFO] [stderr]     Checking approx v0.1.1
[INFO] [stderr]     Checking lazy_static v0.2.11
[INFO] [stderr]     Checking aren_alloc v0.2.1
[INFO] [stderr]     Checking tobj v0.1.12
[INFO] [stderr]     Checking copy_arena v0.1.1
[INFO] [stderr] error: could not compile `aren_alloc` due to 3 previous errors
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] running `Command { std: "docker" "inspect" "bd6dc98271ce536918dd0e81c5cad24671ce5bd5cfe7b57db5a98f2e962e9e3f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "bd6dc98271ce536918dd0e81c5cad24671ce5bd5cfe7b57db5a98f2e962e9e3f", kill_on_drop: false }`
[INFO] [stdout] bd6dc98271ce536918dd0e81c5cad24671ce5bd5cfe7b57db5a98f2e962e9e3f