[INFO] fetching crate fluence-fork-libp2p-floodsub 0.28.1...
[INFO] testing fluence-fork-libp2p-floodsub-0.28.1 against beta-2021-09-12 for beta-1.56-2
[INFO] extracting crate fluence-fork-libp2p-floodsub 0.28.1 into /workspace/builds/worker-6/source
[INFO] validating manifest of crates.io crate fluence-fork-libp2p-floodsub 0.28.1 on toolchain beta-2021-09-12
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2021-09-12" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate fluence-fork-libp2p-floodsub 0.28.1
[INFO] finished tweaking crates.io crate fluence-fork-libp2p-floodsub 0.28.1
[INFO] tweaked toml for crates.io crate fluence-fork-libp2p-floodsub 0.28.1 written to /workspace/builds/worker-6/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2021-09-12" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2021-09-12" "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-6/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/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-2021-09-12" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 280a7420b026b18ea991a32f697ad9192dfce705261d8177e0180d6c31872f86
[INFO] running `Command { std: "docker" "start" "-a" "280a7420b026b18ea991a32f697ad9192dfce705261d8177e0180d6c31872f86", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "280a7420b026b18ea991a32f697ad9192dfce705261d8177e0180d6c31872f86", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "280a7420b026b18ea991a32f697ad9192dfce705261d8177e0180d6c31872f86", kill_on_drop: false }`
[INFO] [stdout] 280a7420b026b18ea991a32f697ad9192dfce705261d8177e0180d6c31872f86
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/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-2021-09-12" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 9d4c7e44cfdd6719dc91c11ecb173596572f9c530e2d1b1c61b95d71a7b61c18
[INFO] running `Command { std: "docker" "start" "-a" "9d4c7e44cfdd6719dc91c11ecb173596572f9c530e2d1b1c61b95d71a7b61c18", 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] [stderr]    Compiling futures-core v0.3.17
[INFO] [stderr]    Compiling prost-derive v0.7.0
[INFO] [stderr]    Compiling thiserror v1.0.29
[INFO] [stderr]    Compiling pin-project v0.4.28
[INFO] [stderr]    Compiling pin-project v1.0.8
[INFO] [stderr]    Compiling asn1_der v0.6.3
[INFO] [stderr]    Compiling zeroize v1.4.1
[INFO] [stderr]    Compiling cuckoofilter v0.5.0
[INFO] [stderr]    Compiling proc-macro-crate v1.0.0
[INFO] [stderr]    Compiling curve25519-dalek v3.2.0
[INFO] [stderr]    Compiling futures-channel v0.3.17
[INFO] [stderr]    Compiling multihash-derive v0.7.2
[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] [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" "9d4c7e44cfdd6719dc91c11ecb173596572f9c530e2d1b1c61b95d71a7b61c18", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "9d4c7e44cfdd6719dc91c11ecb173596572f9c530e2d1b1c61b95d71a7b61c18", kill_on_drop: false }`
[INFO] [stdout] 9d4c7e44cfdd6719dc91c11ecb173596572f9c530e2d1b1c61b95d71a7b61c18