[INFO] cloning repository https://github.com/gluon-lang/gluon
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/gluon-lang/gluon" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fgluon-lang%2Fgluon", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fgluon-lang%2Fgluon'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 27cec6c8ef90de7341d22a2beeade532680aa40c
[INFO] testing gluon-lang/gluon 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%2Fgluon-lang%2Fgluon" "/workspace/builds/worker-79/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-79/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/gluon-lang/gluon 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/gluon-lang/gluon
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[INFO] tweaked toml for git repo https://github.com/gluon-lang/gluon written to /workspace/builds/worker-79/source/Cargo.toml
[INFO] crate git repo https://github.com/gluon-lang/gluon 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 }`
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[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-79/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-79/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 }`
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[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-79/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-79/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 }`
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[INFO] [stderr]    Compiling rand v0.7.3
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[INFO] [stdout] error[E0034]: multiple applicable items in scope
[INFO] [stdout]     --> base/src/types/mod.rs:2793:22
[INFO] [stdout]      |
[INFO] [stdout] 2793 |                     .intersperse(arena.text(".")),
[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] note: candidate #3 is defined in the trait `DocAllocator`
[INFO] [stdout]     --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/pretty-0.10.0/src/lib.rs:794:5
[INFO] [stdout]      |
[INFO] [stdout] 794  | /     fn intersperse<I, S>(&'a self, docs: I, separator: S) -> DocBuilder<'a, Self, A>
[INFO] [stdout] 795  | |     where
[INFO] [stdout] 796  | |         I: IntoIterator,
[INFO] [stdout] 797  | |         I::Item: Into<BuildDoc<'a, Self::Doc, A>>,
[INFO] [stdout] 798  | |         S: Into<BuildDoc<'a, Self::Doc, A>> + Clone,
[INFO] [stdout]      | |____________________________________________________^
[INFO] [stdout] help: disambiguate the associated function for candidate #1
[INFO] [stdout]      |
[INFO] [stdout] 2791 ~                 Iterator::intersperse(ids.iter()
[INFO] [stdout] 2792 ~                     .map(|id| printer.symbol(id)), arena.text(".")),
[INFO] [stdout]      |
[INFO] [stdout] help: disambiguate the associated function for candidate #2
[INFO] [stdout]      |
[INFO] [stdout] 2791 ~                 Itertools::intersperse(ids.iter()
[INFO] [stdout] 2792 ~                     .map(|id| printer.symbol(id)), arena.text(".")),
[INFO] [stdout]      |
[INFO] [stdout] help: disambiguate the associated function for candidate #3
[INFO] [stdout]      |
[INFO] [stdout] 2791 ~                 DocAllocator::intersperse(ids.iter()
[INFO] [stdout] 2792 ~                     .map(|id| printer.symbol(id)), arena.text(".")),
[INFO] [stdout]      |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `itertools::Itertools`
[INFO] [stdout]   --> base/src/types/mod.rs:17:5
[INFO] [stdout]    |
[INFO] [stdout] 17 |     itertools::Itertools,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to previous error; 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0034`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `gluon_base` due to 2 previous errors; 1 warning emitted
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: build failed
[INFO] running `Command { std: "docker" "inspect" "389b1cc3b37c28a9aee7c5e87b1fc902ae190c5fdffed03c81aa9b0445cedff6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "389b1cc3b37c28a9aee7c5e87b1fc902ae190c5fdffed03c81aa9b0445cedff6", kill_on_drop: false }`
[INFO] [stdout] 389b1cc3b37c28a9aee7c5e87b1fc902ae190c5fdffed03c81aa9b0445cedff6