[INFO] cloning repository https://github.com/larvvae/playground
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/larvvae/playground" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Flarvvae%2Fplayground", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Flarvvae%2Fplayground'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 86029851730bf921b834b68a021b0d0f099e2443
[INFO] documenting larvvae/playground against beta-2021-09-08 for beta-1.56-rustdoc-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Flarvvae%2Fplayground" "/workspace/builds/worker-70/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-70/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/larvvae/playground on toolchain beta-2021-09-08
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2021-09-08" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/larvvae/playground
[INFO] finished tweaking git repo https://github.com/larvvae/playground
[INFO] tweaked toml for git repo https://github.com/larvvae/playground written to /workspace/builds/worker-70/source/Cargo.toml
[INFO] crate git repo https://github.com/larvvae/playground already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2021-09-08" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[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:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2021-09-08" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] aa5e3f14e148a479196c0d0ac6e231759897b994e74d94d035f79048df3d9c1c
[INFO] running `Command { std: "docker" "start" "-a" "aa5e3f14e148a479196c0d0ac6e231759897b994e74d94d035f79048df3d9c1c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "aa5e3f14e148a479196c0d0ac6e231759897b994e74d94d035f79048df3d9c1c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "aa5e3f14e148a479196c0d0ac6e231759897b994e74d94d035f79048df3d9c1c", kill_on_drop: false }`
[INFO] [stdout] aa5e3f14e148a479196c0d0ac6e231759897b994e74d94d035f79048df3d9c1c
[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:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2021-09-08" "doc" "--frozen" "--no-deps" "--document-private-items" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 1066c1b6f520fa8bb4d52e6bee944eaf453fa1e872e1b86c9071451f93690cf1
[INFO] running `Command { std: "docker" "start" "-a" "1066c1b6f520fa8bb4d52e6bee944eaf453fa1e872e1b86c9071451f93690cf1", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling autocfg v0.1.7
[INFO] [stderr]    Compiling libc v0.2.66
[INFO] [stderr]    Compiling memchr v2.2.1
[INFO] [stderr]    Compiling proc-macro2 v1.0.6
[INFO] [stderr]    Compiling syn v1.0.11
[INFO] [stderr]    Compiling proc-macro2 v0.4.30
[INFO] [stderr]     Checking rand_core v0.4.2
[INFO] [stderr]    Compiling cc v1.0.48
[INFO] [stderr]    Compiling slog v2.5.2
[INFO] [stderr]    Compiling log v0.4.8
[INFO] [stderr]    Compiling protobuf v2.8.1
[INFO] [stderr]    Compiling syn v0.15.44
[INFO] [stderr]    Compiling byteorder v1.3.2
[INFO] [stderr]    Compiling regex-syntax v0.6.12
[INFO] [stderr]    Compiling failure_derive v0.1.6
[INFO] [stderr]     Checking futures-core v0.3.1
[INFO] [stderr]    Compiling proc-macro-nested v0.1.3
[INFO] [stderr]     Checking futures-sink v0.3.1
[INFO] [stderr]    Compiling either v1.5.3
[INFO] [stderr]     Checking futures-task v0.3.1
[INFO] [stderr]     Checking futures-io v0.3.1
[INFO] [stderr]     Checking unicode-width v0.1.7
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[INFO] [stderr]     Checking bytes v0.5.2
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[INFO] [stderr]    Compiling thread_local v0.3.6
[INFO] [stderr]    Compiling error-chain v0.12.1
[INFO] [stderr]     Checking bitflags v1.2.1
[INFO] [stderr]    Compiling memoffset v0.5.3
[INFO] [stderr]     Checking rand_core v0.3.1
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[INFO] [stderr]    Compiling itertools v0.8.2
[INFO] [stderr]     Checking futures-channel v0.3.1
[INFO] [stderr]     Checking textwrap v0.11.0
[INFO] [stderr]     Checking rand_isaac v0.1.1
[INFO] [stderr]     Checking rand_xorshift v0.1.1
[INFO] [stderr]     Checking rand_hc v0.1.0
[INFO] [stderr]    Compiling crossbeam-utils v0.7.0
[INFO] [stderr]    Compiling num-traits v0.2.10
[INFO] [stderr]    Compiling crossbeam-epoch v0.8.0
[INFO] [stderr]    Compiling num-integer v0.1.41
[INFO] [stderr]    Compiling rand_pcg v0.1.2
[INFO] [stderr]    Compiling rand_chacha v0.1.1
[INFO] [stderr]    Compiling indexmap v1.3.0
[INFO] [stderr]    Compiling rand v0.6.5
[INFO] [stderr]     Checking slog-scope v4.3.0
[INFO] [stderr]     Checking slog-async v2.3.0
[INFO] [stderr]     Checking slog-global v0.1.0 (https://github.com/breeswish/slog-global.git?rev=0e23a5baff302a9d7bccd85f8f31e43339c2f2c1#0e23a5ba)
[INFO] [stderr]     Checking aho-corasick v0.7.6
[INFO] [stderr]    Compiling backtrace-sys v0.1.32
[INFO] [stderr]     Checking fxhash v0.2.1
[INFO] [stderr]    Compiling quote v1.0.2
[INFO] [stderr]     Checking iovec v0.1.4
[INFO] [stderr]     Checking dirs-sys v0.3.4
[INFO] [stderr]     Checking time v0.1.42
[INFO] [stderr]     Checking atty v0.2.13
[INFO] [stderr]     Checking net2 v0.2.33
[INFO] [stderr]     Checking rand_os v0.1.3
[INFO] [stderr]     Checking num_cpus v1.11.1
[INFO] [stderr]     Checking signal-hook-registry v1.2.0
[INFO] [stderr]    Compiling quote v0.6.13
[INFO] [stderr]     Checking dirs v2.0.2
[INFO] [stderr]     Checking bytes v0.4.12
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[INFO] [stderr]     Checking term v0.6.1
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[INFO] [stderr]     Checking crossbeam v0.7.3
[INFO] [stderr]     Checking slog-stdlog v4.0.0
[INFO] [stderr]     Checking mio-uds v0.6.7
[INFO] [stderr]    Compiling regex v1.3.1
[INFO] [stderr]    Compiling backtrace v0.3.40
[INFO] [stderr]     Checking chrono v0.4.10
[INFO] [stderr]     Checking slog-term v2.4.2
[INFO] [stderr]     Checking slog-envlogger v2.2.0
[INFO] [stderr]    Compiling protobuf-codegen v2.8.1
[INFO] [stderr]    Compiling protobuf-build v0.10.0
[INFO] [stderr]    Compiling synstructure v0.12.3
[INFO] [stderr]    Compiling getset v0.0.7
[INFO] [stderr]    Compiling clap_derive v0.3.0 (https://github.com/clap-rs/clap_derive#4a46684b)
[INFO] [stderr]    Compiling slog_derive v0.1.1
[INFO] [stderr]    Compiling raft-proto v0.6.0-alpha (https://github.com/tikv/raft-rs.git?rev=f7f7d0121132ef6406b59fc774778285cd1477d6#f7f7d012)
[INFO] [stderr]     Checking clap v3.0.0-beta.1 (https://github.com/clap-rs/clap.git?rev=a2f9fb5f6c2aeeac89c5c638f25dedb9e50bde00#a2f9fb5f)
[INFO] [stderr]    Compiling proc-macro-hack v0.5.11
[INFO] [stderr]    Compiling tokio-macros v0.2.0
[INFO] [stderr]     Checking raft v0.6.0-alpha (https://github.com/tikv/raft-rs.git?rev=f7f7d0121132ef6406b59fc774778285cd1477d6#f7f7d012)
[INFO] [stderr]     Checking tokio v0.2.4
[INFO] [stderr]    Compiling futures-macro v0.3.1
[INFO] [stderr]    Compiling failure v0.1.6
[INFO] [stderr]    Compiling prost-derive v0.5.0
[INFO] [stdout] error[E0034]: multiple applicable items in scope
[INFO] [stdout]    --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/prost-derive-0.5.0/src/lib.rs:114:14
[INFO] [stdout]     |
[INFO] [stdout] 114 |             .intersperse(quote!(|));
[INFO] [stdout]     |              ^^^^^^^^^^^ multiple `intersperse` found
[INFO] [stdout]     |
[INFO] [stdout]     = note: candidate #1 is defined in an impl of the trait `Iterator` for the type `Map<I, F>`
[INFO] [stdout]     = note: candidate #2 is defined in an impl of the trait `Itertools` for the type `T`
[INFO] [stdout] help: disambiguate the associated function for candidate #1
[INFO] [stdout]     |
[INFO] [stdout] 110 ~         let tags = Iterator::intersperse(field
[INFO] [stdout] 111 +             .tags()
[INFO] [stdout] 112 +             .into_iter()
[INFO] [stdout] 113 +             .map(|tag| quote!(#tag)), {
[INFO] [stdout] 114 +         let mut _s = $crate::__rt::TokenStream::new();
[INFO] [stdout] 115 +         let _span = $span;
[INFO] [stdout]   ...
[INFO] [stdout] help: disambiguate the associated function for candidate #2
[INFO] [stdout]     |
[INFO] [stdout] 110 ~         let tags = Itertools::intersperse(field
[INFO] [stdout] 111 +             .tags()
[INFO] [stdout] 112 +             .into_iter()
[INFO] [stdout] 113 +             .map(|tag| quote!(#tag)), {
[INFO] [stdout] 114 +         let mut _s = $crate::__rt::TokenStream::new();
[INFO] [stdout] 115 +         let _span = $span;
[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 E0034`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `prost-derive` due to 2 previous errors
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: build failed
[INFO] running `Command { std: "docker" "inspect" "1066c1b6f520fa8bb4d52e6bee944eaf453fa1e872e1b86c9071451f93690cf1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1066c1b6f520fa8bb4d52e6bee944eaf453fa1e872e1b86c9071451f93690cf1", kill_on_drop: false }`
[INFO] [stdout] 1066c1b6f520fa8bb4d52e6bee944eaf453fa1e872e1b86c9071451f93690cf1