[INFO] fetching crate doublets-decorators 0.1.0-alpha.2...
[INFO] documenting doublets-decorators-0.1.0-alpha.2 against 1.61.0 for beta-1.62-rustdoc-1
[INFO] extracting crate doublets-decorators 0.1.0-alpha.2 into /workspace/builds/worker-3/source
[INFO] validating manifest of crates.io crate doublets-decorators 0.1.0-alpha.2 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 doublets-decorators 0.1.0-alpha.2
[INFO] finished tweaking crates.io crate doublets-decorators 0.1.0-alpha.2
[INFO] tweaked toml for crates.io crate doublets-decorators 0.1.0-alpha.2 written to /workspace/builds/worker-3/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] [stderr]     Blocking waiting for file lock on package cache
[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 doublets v0.1.0-alpha.18
[INFO] [stderr]   Downloaded platform-data v0.1.0-aplha.0
[INFO] [stderr]   Downloaded platform-treesmethods v0.1.0-aplha.1
[INFO] [stderr]   Downloaded platform-num v0.1.0-aplha.0
[INFO] [stderr]   Downloaded platform-mem v0.1.0-aplha.5
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/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] 8bf34d08c5a230307ea1da0019ac13be48c4b7be4cf48f3b6ab106f35dc19d12
[INFO] running `Command { std: "docker" "start" "-a" "8bf34d08c5a230307ea1da0019ac13be48c4b7be4cf48f3b6ab106f35dc19d12", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "8bf34d08c5a230307ea1da0019ac13be48c4b7be4cf48f3b6ab106f35dc19d12", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "8bf34d08c5a230307ea1da0019ac13be48c4b7be4cf48f3b6ab106f35dc19d12", kill_on_drop: false }`
[INFO] [stdout] 8bf34d08c5a230307ea1da0019ac13be48c4b7be4cf48f3b6ab106f35dc19d12
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/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] 3699ab0b7a5084e1fc5c21c6daf2b192fe079ea7ca3f626fdbaecc8d1d64c50c
[INFO] running `Command { std: "docker" "start" "-a" "3699ab0b7a5084e1fc5c21c6daf2b192fe079ea7ca3f626fdbaecc8d1d64c50c", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.126
[INFO] [stderr]     Checking cfg-if v1.0.0
[INFO] [stderr]    Compiling autocfg v1.1.0
[INFO] [stderr]    Compiling proc-macro2 v1.0.39
[INFO] [stderr]    Compiling memchr v2.5.0
[INFO] [stderr]    Compiling unicode-ident v1.0.0
[INFO] [stderr]    Compiling syn v1.0.95
[INFO] [stderr]     Checking fastrand v1.7.0
[INFO] [stderr]    Compiling log v0.4.17
[INFO] [stderr]     Checking remove_dir_all v0.5.3
[INFO] [stderr]     Checking regex-syntax v0.6.26
[INFO] [stderr]     Checking ppv-lite86 v0.2.16
[INFO] [stderr]     Checking humantime v2.1.0
[INFO] [stderr]     Checking termcolor v1.1.3
[INFO] [stderr]     Checking bumpalo v3.9.1
[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/bumpalo-3.9.1/src/lib.rs:7:13
[INFO] [stdout]   |
[INFO] [stdout] 7 |     feature(allocator_api, nonnull_slice_from_raw_parts)
[INFO] [stdout]   |             ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[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/bumpalo-3.9.1/src/lib.rs:7:28
[INFO] [stdout]   |
[INFO] [stdout] 7 |     feature(allocator_api, nonnull_slice_from_raw_parts)
[INFO] [stdout]   |                            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[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 compile `bumpalo` due to 3 previous errors
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] running `Command { std: "docker" "inspect" "3699ab0b7a5084e1fc5c21c6daf2b192fe079ea7ca3f626fdbaecc8d1d64c50c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "3699ab0b7a5084e1fc5c21c6daf2b192fe079ea7ca3f626fdbaecc8d1d64c50c", kill_on_drop: false }`
[INFO] [stdout] 3699ab0b7a5084e1fc5c21c6daf2b192fe079ea7ca3f626fdbaecc8d1d64c50c