[INFO] cloning repository https://github.com/jfrikker/arbiter
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/jfrikker/arbiter" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fjfrikker%2Farbiter", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fjfrikker%2Farbiter'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] b8fbe0b7dfe90154994c1ce1e4eaaf33cc50b42c
[INFO] testing jfrikker/arbiter against beta-2021-09-08 for beta-1.56-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fjfrikker%2Farbiter" "/workspace/builds/worker-2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-2/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/jfrikker/arbiter 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/jfrikker/arbiter
[INFO] finished tweaking git repo https://github.com/jfrikker/arbiter
[INFO] tweaked toml for git repo https://github.com/jfrikker/arbiter written to /workspace/builds/worker-2/source/Cargo.toml
[INFO] crate git repo https://github.com/jfrikker/arbiter 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] 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:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2021-09-08" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 34d0d937f89fe117916a2c388733737405498cd7fbfc2b05de125acfc51accc4
[INFO] running `Command { std: "docker" "start" "-a" "34d0d937f89fe117916a2c388733737405498cd7fbfc2b05de125acfc51accc4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "34d0d937f89fe117916a2c388733737405498cd7fbfc2b05de125acfc51accc4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "34d0d937f89fe117916a2c388733737405498cd7fbfc2b05de125acfc51accc4", kill_on_drop: false }`
[INFO] [stdout] 34d0d937f89fe117916a2c388733737405498cd7fbfc2b05de125acfc51accc4
[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" "RUSTFLAGS=--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" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 70f31c160fb2600cf304caf59ef3256c23cb67fe9b9b43c4c5cac8f4c101c813
[INFO] running `Command { std: "docker" "start" "-a" "70f31c160fb2600cf304caf59ef3256c23cb67fe9b9b43c4c5cac8f4c101c813", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.51
[INFO] [stderr]    Compiling cc v1.0.35
[INFO] [stderr]    Compiling futures v0.1.26
[INFO] [stderr]    Compiling rustc-demangle v0.1.13
[INFO] [stderr]    Compiling syn v0.15.30
[INFO] [stderr]    Compiling remove_dir_all v0.5.1
[INFO] [stderr]    Compiling unicode-segmentation v1.2.1
[INFO] [stderr]    Compiling multimap v0.4.0
[INFO] [stderr]    Compiling termcolor v0.3.6
[INFO] [stderr]    Compiling log v0.4.6
[INFO] [stderr]    Compiling backtrace v0.3.15
[INFO] [stderr]    Compiling itertools v0.8.0
[INFO] [stderr]    Compiling petgraph v0.4.13
[INFO] [stderr]    Compiling thread_local v0.3.6
[INFO] [stderr]    Compiling quote v0.6.12
[INFO] [stderr]    Compiling heck v0.3.1
[INFO] [stderr]    Compiling backtrace-sys v0.1.28
[INFO] [stderr]    Compiling tokio-executor v0.1.7
[INFO] [stderr]    Compiling tokio-sync v0.1.4
[INFO] [stderr]    Compiling tokio-timer v0.2.10
[INFO] [stderr]    Compiling tokio-current-thread v0.1.6
[INFO] [stderr]    Compiling iovec v0.1.2
[INFO] [stderr]    Compiling rand_os v0.1.3
[INFO] [stderr]    Compiling net2 v0.2.33
[INFO] [stderr]    Compiling num_cpus v1.10.0
[INFO] [stderr]    Compiling time v0.1.42
[INFO] [stderr]    Compiling bytes v0.4.12
[INFO] [stderr]    Compiling rand v0.6.5
[INFO] [stderr]    Compiling chrono v0.4.6
[INFO] [stderr]    Compiling mio v0.6.16
[INFO] [stderr]    Compiling tokio-io v0.1.12
[INFO] [stderr]    Compiling tokio-codec v0.1.1
[INFO] [stderr]    Compiling failure v0.1.5
[INFO] [stderr]    Compiling parking_lot_core v0.4.0
[INFO] [stderr]    Compiling tempfile v3.0.7
[INFO] [stderr]    Compiling tokio-threadpool v0.1.13
[INFO] [stderr]    Compiling mio-uds v0.6.7
[INFO] [stderr]    Compiling stderrlog v0.4.1
[INFO] [stderr]    Compiling parking_lot v0.7.1
[INFO] [stderr]    Compiling which v2.0.1
[INFO] [stderr]    Compiling tokio-fs v0.1.6
[INFO] [stderr]    Compiling tokio-reactor v0.1.9
[INFO] [stderr]    Compiling prost-build v0.5.0
[INFO] [stderr]    Compiling tokio-udp v0.1.3
[INFO] [stderr]    Compiling tokio-tcp v0.1.3
[INFO] [stderr]    Compiling tokio-uds v0.2.5
[INFO] [stderr]    Compiling prost-derive v0.5.0
[INFO] [stderr]    Compiling tokio v0.1.18
[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" "70f31c160fb2600cf304caf59ef3256c23cb67fe9b9b43c4c5cac8f4c101c813", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "70f31c160fb2600cf304caf59ef3256c23cb67fe9b9b43c4c5cac8f4c101c813", kill_on_drop: false }`
[INFO] [stdout] 70f31c160fb2600cf304caf59ef3256c23cb67fe9b9b43c4c5cac8f4c101c813