[INFO] fetching crate otter 0.7.3...
[INFO] documenting otter-0.7.3 against beta-2021-08-01 for beta-1.55-rustdoc-1
[INFO] extracting crate otter 0.7.3 into /workspace/builds/worker-2/source
[INFO] validating manifest of crates.io crate otter 0.7.3 on toolchain beta-2021-08-01
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2021-08-01" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate otter 0.7.3
[INFO] finished tweaking crates.io crate otter 0.7.3
[INFO] tweaked toml for crates.io crate otter 0.7.3 written to /workspace/builds/worker-2/source/Cargo.toml
[INFO] crate crates.io crate otter 0.7.3 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2021-08-01" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2021-08-01" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] bd83b67435fc04d3c3af5facd0d8d35528f70b3db5e5f5181870e868ab004073
[INFO] running `Command { std: "docker" "start" "-a" "bd83b67435fc04d3c3af5facd0d8d35528f70b3db5e5f5181870e868ab004073", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "bd83b67435fc04d3c3af5facd0d8d35528f70b3db5e5f5181870e868ab004073", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "bd83b67435fc04d3c3af5facd0d8d35528f70b3db5e5f5181870e868ab004073", kill_on_drop: false }`
[INFO] [stdout] bd83b67435fc04d3c3af5facd0d8d35528f70b3db5e5f5181870e868ab004073
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2021-08-01" "doc" "--frozen" "--no-deps" "--document-private-items" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] c3bf41130f0d47e244ff86fbd997d0b40d766530663f86cd971ddfe162fcf9b0
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "c3bf41130f0d47e244ff86fbd997d0b40d766530663f86cd971ddfe162fcf9b0", kill_on_drop: false }`
[INFO] [stderr]    Compiling inventory v0.1.10
[INFO] [stderr]    Compiling bzip2-sys v0.1.11+1.0.8
[INFO] [stderr]     Checking unic-ucd-segment v0.9.0
[INFO] [stderr]     Checking object v0.25.3
[INFO] [stderr]     Checking mio v0.7.13
[INFO] [stderr]    Compiling derive-into-owned v0.1.0
[INFO] [stderr]    Compiling proc-macro-error v1.0.4
[INFO] [stderr]     Checking chrono v0.4.19
[INFO] [stderr]     Checking globset v0.4.8
[INFO] [stderr]     Checking num-iter v0.1.42
[INFO] [stderr]    Compiling typetag-impl v0.1.7
[INFO] [stderr]     Checking console v0.14.1
[INFO] [stderr]    Compiling delegate v0.6.1
[INFO] [stderr]     Checking nix v0.22.0
[INFO] [stderr]    Compiling enum_dispatch v0.3.7
[INFO] [stderr]     Checking env_logger v0.9.0
[INFO] [stderr]     Checking serde v1.0.126
[INFO] [stderr]     Checking mio-extras v2.0.6
[INFO] [stderr]     Checking clap v2.33.3
[INFO] [stderr]    Compiling darling_macro v0.13.0
[INFO] [stderr]    Compiling parse-zoneinfo v0.3.0
[INFO] [stderr]    Compiling failure_derive v0.1.8
[INFO] [stderr]     Checking md-5 v0.9.1
[INFO] [stderr]     Checking fehler v1.0.0
[INFO] [stderr]    Compiling pest_derive v2.1.0
[INFO] [stderr]     Checking strum v0.21.0
[INFO] [stderr]     Checking image v0.23.14
[INFO] [stderr]     Checking ignore v0.4.18
[INFO] [stderr]     Checking notify v4.0.17
[INFO] [stderr]    Compiling structopt-derive v0.4.15
[INFO] [stderr]    Compiling extend v1.1.1
[INFO] [stderr]     Checking unic-segment v0.9.0
[INFO] [stderr]     Checking num v0.4.0
[INFO] [stderr]     Checking openssh-keys v0.5.0
[INFO] [stderr]     Checking globwalk v0.8.1
[INFO] [stderr]     Checking bzip2 v0.4.3
[INFO] [stderr]    Compiling darling v0.13.0
[INFO] [stderr]     Checking zip v0.5.13
[INFO] [stderr]    Compiling serde_with_macros v1.4.2
[INFO] [stderr]    Compiling chrono-tz v0.5.3
[INFO] [stderr]     Checking backtrace v0.3.60
[INFO] [stderr]     Checking serde_json v1.0.64
[INFO] [stderr]     Checking toml v0.5.8
[INFO] [stderr]     Checking erased-serde v0.3.16
[INFO] [stderr]     Checking enum-map v1.1.1
[INFO] [stderr]     Checking rmp-serde v0.15.5
[INFO] [stderr]     Checking index_vec v0.1.2
[INFO] [stderr]     Checking slotmap-fork-otter v1.0.2
[INFO] [stderr]     Checking failure v0.1.8
[INFO] [stderr]     Checking structopt v0.3.22
[INFO] [stderr]     Checking pwd v1.3.1
[INFO] [stderr]     Checking serde_with v1.9.4
[INFO] [stderr]     Checking typetag v0.1.7
[INFO] [stderr]     Checking flexi_logger v0.18.0
[INFO] [stderr]    Compiling proc-macro-crate v0.1.5
[INFO] [stderr]     Checking otter-base v0.7.3
[INFO] [stderr]    Compiling cast_trait_object_macros v0.1.3
[INFO] [stderr]     Checking cast_trait_object v0.1.3
[INFO] [stderr]     Checking tera v1.12.1
[INFO] [stderr]     Checking otter v0.7.3 (/opt/rustwide/workdir)
[INFO] [stderr]  Documenting otter v0.7.3 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stdout]  --> src/lib.rs:5:1
[INFO] [stdout]   |
[INFO] [stdout] 5 | #![feature(min_type_alias_impl_trait)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stdout]  --> src/lib.rs:5:1
[INFO] [stdout]   |
[INFO] [stdout] 5 | #![feature(min_type_alias_impl_trait)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: Compilation failed, aborting rustdoc
[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 document `otter`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustdoc --edition=2018 --crate-type lib --crate-name otter src/lib.rs -o /opt/rustwide/target/doc --error-format=json --json=diagnostic-rendered-ansi --document-private-items -L dependency=/opt/rustwide/target/debug/deps --extern anyhow=/opt/rustwide/target/debug/deps/libanyhow-e0c590a61c268547.rmeta --extern backtrace=/opt/rustwide/target/debug/deps/libbacktrace-c60f3ef36921772b.rmeta --extern base64=/opt/rustwide/target/debug/deps/libbase64-0feadca7abf19989.rmeta --extern boolinator=/opt/rustwide/target/debug/deps/libboolinator-6554c290f6bfd673.rmeta --extern byteorder=/opt/rustwide/target/debug/deps/libbyteorder-bd8a801b2746a03c.rmeta --extern cast_trait_object=/opt/rustwide/target/debug/deps/libcast_trait_object-aad49a4469e1fa28.rmeta --extern chrono=/opt/rustwide/target/debug/deps/libchrono-b368ad0d3d4f1b6b.rmeta --extern chrono_tz=/opt/rustwide/target/debug/deps/libchrono_tz-96de7b55d7df72ca.rmeta --extern console=/opt/rustwide/target/debug/deps/libconsole-7a4caf0db5922d1a.rmeta --extern crossbeam_utils=/opt/rustwide/target/debug/deps/libcrossbeam_utils-169f3761b1bf7342.rmeta --extern delegate=/opt/rustwide/target/debug/deps/libdelegate-3202db8746029da9.so --extern derive_into_owned=/opt/rustwide/target/debug/deps/libderive_into_owned-0bad2c139748a189.so --extern digest=/opt/rustwide/target/debug/deps/libdigest-92c60e8b123204d1.rmeta --extern downcast_rs=/opt/rustwide/target/debug/deps/libdowncast_rs-aa01796cda91c4ec.rmeta --extern either=/opt/rustwide/target/debug/deps/libeither-289a99daa7aee5d6.rmeta --extern enum_map=/opt/rustwide/target/debug/deps/libenum_map-25f94a361f271539.rmeta --extern enum_dispatch=/opt/rustwide/target/debug/deps/libenum_dispatch-a4ec62c18fa43e4b.so --extern env_logger=/opt/rustwide/target/debug/deps/libenv_logger-74091f3468429eca.rmeta --extern failure=/opt/rustwide/target/debug/deps/libfailure-7b3947c33c066fbf.rmeta --extern fehler=/opt/rustwide/target/debug/deps/libfehler-68d9250b9fee600f.rmeta --extern flexi_logger=/opt/rustwide/target/debug/deps/libflexi_logger-0dc38a0220c70944.rmeta --extern fs2=/opt/rustwide/target/debug/deps/libfs2-baeb9079e5f80c31.rmeta --extern glob=/opt/rustwide/target/debug/deps/libglob-029696837cd6fb58.rmeta --extern image=/opt/rustwide/target/debug/deps/libimage-dfe4697afb63b6b9.rmeta --extern index_vec=/opt/rustwide/target/debug/deps/libindex_vec-df533e23eae17314.rmeta --extern inventory=/opt/rustwide/target/debug/deps/libinventory-c9fe5c9659ad915d.rmeta --extern lazy_init=/opt/rustwide/target/debug/deps/liblazy_init-73217849ebcc80de.rmeta --extern lazy_static=/opt/rustwide/target/debug/deps/liblazy_static-5e37eee3e84fafab.rmeta --extern libc=/opt/rustwide/target/debug/deps/liblibc-9545ac4a144a3a20.rmeta --extern log=/opt/rustwide/target/debug/deps/liblog-56a705720bafac8d.rmeta --extern mio=/opt/rustwide/target/debug/deps/libmio-f960bace7bfbb9af.rmeta --extern nix=/opt/rustwide/target/debug/deps/libnix-efb2e0532f6dbb40.rmeta --extern num=/opt/rustwide/target/debug/deps/libnum-076fe5d60f42d1ec.rmeta --extern num_derive=/opt/rustwide/target/debug/deps/libnum_derive-74dff672e75b8e2b.so --extern num_traits=/opt/rustwide/target/debug/deps/libnum_traits-eef4fcc8be0149bf.rmeta --extern once_cell=/opt/rustwide/target/debug/deps/libonce_cell-f0af484c73954b52.rmeta --extern openssh_keys=/opt/rustwide/target/debug/deps/libopenssh_keys-42bc53f18f0c6e97.rmeta --extern ordered_float=/opt/rustwide/target/debug/deps/libordered_float-9d1c4fd6e78d2741.rmeta --extern otter_base=/opt/rustwide/target/debug/deps/libotter_base-e8e44a8b54acc57c.rmeta --extern parking_lot=/opt/rustwide/target/debug/deps/libparking_lot-a739c463f9d52946.rmeta --extern percent_encoding=/opt/rustwide/target/debug/deps/libpercent_encoding-2cb69b838485abd5.rmeta --extern pwd=/opt/rustwide/target/debug/deps/libpwd-48e523a450231c9f.rmeta --extern rand=/opt/rustwide/target/debug/deps/librand-69e93a72c6edabb2.rmeta --extern regex=/opt/rustwide/target/debug/deps/libregex-fd7c22c517e8d025.rmeta --extern rmp=/opt/rustwide/target/debug/deps/librmp-a0732e84352c3c4f.rmeta --extern rmp_serde=/opt/rustwide/target/debug/deps/librmp_serde-9efe87a161d2ada2.rmeta --extern serde=/opt/rustwide/target/debug/deps/libserde-b326fb56025d1c64.rmeta --extern serde_with=/opt/rustwide/target/debug/deps/libserde_with-6810c8159d26063c.rmeta --extern sha2=/opt/rustwide/target/debug/deps/libsha2-f9db1dff45806c4a.rmeta --extern slotmap=/opt/rustwide/target/debug/deps/libslotmap_fork_otter-9431c0d96b586dda.rmeta --extern structopt=/opt/rustwide/target/debug/deps/libstructopt-be75ce1c6565f6a4.rmeta --extern strum=/opt/rustwide/target/debug/deps/libstrum-370b513f6df87f36.rmeta --extern subtle=/opt/rustwide/target/debug/deps/libsubtle-14ae9e8ef6bf0ef5.rmeta --extern tempfile=/opt/rustwide/target/debug/deps/libtempfile-baa663f8b54c6b79.rmeta --extern tera_standalone=/opt/rustwide/target/debug/deps/libtera-8695f889868c3358.rmeta --extern toml=/opt/rustwide/target/debug/deps/libtoml-7b6e55cfc80cdfdd.rmeta --extern typetag=/opt/rustwide/target/debug/deps/libtypetag-aceafa9e04fe2ff6.rmeta --extern uds=/opt/rustwide/target/debug/deps/libuds-8aae87c0f59bb58a.rmeta --extern unicase=/opt/rustwide/target/debug/deps/libunicase-b785ff1d6a7922e9.rmeta --extern unicode_width=/opt/rustwide/target/debug/deps/libunicode_width-e9779f261159561f.rmeta --extern url=/opt/rustwide/target/debug/deps/liburl-806d79d4acc77e1f.rmeta --extern vecdeque_stableix=/opt/rustwide/target/debug/deps/libvecdeque_stableix-9f9e04eee5095707.rmeta --extern xmlparser=/opt/rustwide/target/debug/deps/libxmlparser-4df718492a04b297.rmeta --extern zip=/opt/rustwide/target/debug/deps/libzip-44a5c12c182c54d1.rmeta --cap-lints=warn --crate-version 0.7.3` (exit status: 1)
[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] [stderr] error: build failed
[INFO] running `Command { std: "docker" "inspect" "c3bf41130f0d47e244ff86fbd997d0b40d766530663f86cd971ddfe162fcf9b0", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c3bf41130f0d47e244ff86fbd997d0b40d766530663f86cd971ddfe162fcf9b0", kill_on_drop: false }`
[INFO] [stdout] c3bf41130f0d47e244ff86fbd997d0b40d766530663f86cd971ddfe162fcf9b0
