[INFO] fetching crate chain-spec-builder 2.0.0...
[INFO] testing chain-spec-builder-2.0.0 against beta-2021-09-08 for beta-1.56-1
[INFO] extracting crate chain-spec-builder 2.0.0 into /workspace/builds/worker-11/source
[INFO] validating manifest of crates.io crate chain-spec-builder 2.0.0 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 crates.io crate chain-spec-builder 2.0.0
[INFO] finished tweaking crates.io crate chain-spec-builder 2.0.0
[INFO] tweaked toml for crates.io crate chain-spec-builder 2.0.0 written to /workspace/builds/worker-11/source/Cargo.toml
[INFO] crate crates.io crate chain-spec-builder 2.0.0 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]  Downloading crates ...
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[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-11/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-11/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] 91a608447cacb0286270c003cb445ec5d418cefbd24e8b558da97beba72adf9d
[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" "91a608447cacb0286270c003cb445ec5d418cefbd24e8b558da97beba72adf9d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "91a608447cacb0286270c003cb445ec5d418cefbd24e8b558da97beba72adf9d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "91a608447cacb0286270c003cb445ec5d418cefbd24e8b558da97beba72adf9d", kill_on_drop: false }`
[INFO] [stdout] 91a608447cacb0286270c003cb445ec5d418cefbd24e8b558da97beba72adf9d
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-11/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-11/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] 94a0b820824a8baad44227688b4bda587ad64f0822ac5d31dfc3b3275b4f7573
[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" "94a0b820824a8baad44227688b4bda587ad64f0822ac5d31dfc3b3275b4f7573", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.26
[INFO] [stderr]    Compiling syn v1.0.68
[INFO] [stderr]    Compiling libc v0.2.92
[INFO] [stderr]    Compiling value-bag v1.0.0-alpha.6
[INFO] [stderr]    Compiling serde_derive v1.0.125
[INFO] [stderr]    Compiling serde v1.0.125
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[INFO] [stderr]    Compiling futures-core v0.3.13
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[INFO] [stderr]    Compiling anyhow v1.0.40
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[INFO] [stderr]    Compiling block-padding v0.2.1
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[INFO] [stderr]    Compiling ref-cast-impl v1.0.6
[INFO] [stderr]    Compiling debug-derive v2.0.2
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[INFO] [stderr]    Compiling pin-project-internal v1.0.6
[INFO] [stderr]    Compiling asn1_der_derive v0.1.2
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[INFO] [stdout] error[E0034]: multiple applicable items in scope
[INFO] [stdout]    --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/prost-derive-0.7.0/src/lib.rs:109:14
[INFO] [stdout]     |
[INFO] [stdout] 109 |             .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] 105 ~         let tags = Iterator::intersperse(field
[INFO] [stdout] 106 +             .tags()
[INFO] [stdout] 107 +             .into_iter()
[INFO] [stdout] 108 +             .map(|tag| quote!(#tag)), {
[INFO] [stdout] 109 +         let mut _s = $crate::__private::TokenStream::new();
[INFO] [stdout] 110 +         $crate::quote_each_token!(_s $($tt)*);
[INFO] [stdout]   ...
[INFO] [stdout] help: disambiguate the associated function for candidate #2
[INFO] [stdout]     |
[INFO] [stdout] 105 ~         let tags = Itertools::intersperse(field
[INFO] [stdout] 106 +             .tags()
[INFO] [stdout] 107 +             .into_iter()
[INFO] [stdout] 108 +             .map(|tag| quote!(#tag)), {
[INFO] [stdout] 109 +         let mut _s = $crate::__private::TokenStream::new();
[INFO] [stdout] 110 +         $crate::quote_each_token!(_s $($tt)*);
[INFO] [stdout]   ...
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]    Compiling tetsy-libp2p-core-derive v0.21.1
[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" "94a0b820824a8baad44227688b4bda587ad64f0822ac5d31dfc3b3275b4f7573", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "94a0b820824a8baad44227688b4bda587ad64f0822ac5d31dfc3b3275b4f7573", kill_on_drop: false }`
[INFO] [stdout] 94a0b820824a8baad44227688b4bda587ad64f0822ac5d31dfc3b3275b4f7573