[INFO] crate xain-fl 0.8.0 is already in cache
[INFO] checking xain-fl-0.8.0 against master#bd0bacc694d7d8175804bb6f690cb846bfa4a9ee for pr-71665
[INFO] extracting crate xain-fl 0.8.0 into /workspace/builds/worker-3/source
[INFO] validating manifest of crates.io crate xain-fl 0.8.0 on toolchain bd0bacc694d7d8175804bb6f690cb846bfa4a9ee
[INFO] running `"/workspace/cargo-home/bin/cargo" "+bd0bacc694d7d8175804bb6f690cb846bfa4a9ee" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking crates.io crate xain-fl 0.8.0
[INFO] finished tweaking crates.io crate xain-fl 0.8.0
[INFO] tweaked toml for crates.io crate xain-fl 0.8.0 written to /workspace/builds/worker-3/source/Cargo.toml
[INFO] crate crates.io crate xain-fl 0.8.0 already has a lockfile, it will not be regenerated
[INFO] running `"/workspace/cargo-home/bin/cargo" "+bd0bacc694d7d8175804bb6f690cb846bfa4a9ee" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/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" "MAP_USER_ID=0" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--network" "none" "rustops/crates-build-env" "/opt/rustwide/cargo-home/bin/cargo" "+bd0bacc694d7d8175804bb6f690cb846bfa4a9ee" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 81d58211d6ac069140aa2cf81a5e06c836cd252d4218f0eef5eb39fe169687eb
[INFO] running `"docker" "start" "-a" "81d58211d6ac069140aa2cf81a5e06c836cd252d4218f0eef5eb39fe169687eb"`
[INFO] [stderr] sudo: setrlimit(RLIMIT_CORE): Operation not permitted
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling autocfg v0.1.7
[INFO] [stderr]    Compiling serde v1.0.105
[INFO] [stderr]    Compiling rand_core v0.4.2
[INFO] [stderr]    Compiling proc-macro-hack v0.5.14
[INFO] [stderr]     Checking itoa v0.4.5
[INFO] [stderr]    Compiling proc-macro-nested v0.1.4
[INFO] [stderr]    Compiling byteorder v1.3.4
[INFO] [stderr]     Checking arc-swap v0.4.5
[INFO] [stderr]     Checking regex-syntax v0.6.17
[INFO] [stderr]    Compiling bitflags v1.2.1
[INFO] [stderr]    Compiling arrayvec v0.4.12
[INFO] [stderr]     Checking nodrop v0.1.14
[INFO] [stderr]     Checking mime v0.3.16
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[INFO] [stderr]     Checking static_assertions v0.3.4
[INFO] [stderr]     Checking opaque-debug v0.2.3
[INFO] [stderr]     Checking ansi_term v0.11.0
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[INFO] [stderr]    Compiling unicase v2.6.0
[INFO] [stderr]    Compiling nom v5.1.1
[INFO] [stderr]    Compiling indexmap v1.3.2
[INFO] [stderr]     Checking tracing-core v0.1.10
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[INFO] [stderr]     Checking rand_core v0.3.1
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[INFO] [stderr]     Checking http v0.2.0
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[INFO] [stderr]    Compiling libc v0.2.68
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[INFO] [stderr]     Checking rand_xorshift v0.1.1
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[INFO] [stderr]    Compiling rand_pcg v0.1.2
[INFO] [stderr]    Compiling rand_chacha v0.1.1
[INFO] [stderr]    Compiling rand v0.6.5
[INFO] [stderr]    Compiling lexical-core v0.6.2
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[INFO] [stderr]     Checking rand_core v0.5.1
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[INFO] [stderr]     Checking multipart v0.16.1
[INFO] [stderr]    Compiling pyo3-derive-backend v0.9.1
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[INFO] [stderr]    Compiling futures-macro v0.3.4
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[INFO] [stderr]    Compiling pin-project-internal v0.4.8
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[INFO] [stderr]    Compiling indoc-impl v0.3.5
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[INFO] [stderr]    Compiling ctor v0.1.13
[INFO] [stderr]    Compiling ghost v0.1.1
[INFO] [stderr]    Compiling thiserror-impl v1.0.13
[INFO] [stderr]    Compiling tarpc-plugins v0.7.0
[INFO] [stderr]    Compiling derive_more v0.99.3
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[INFO] [stderr]     Checking toml v0.5.6
[INFO] [stderr]     Checking uuid v0.8.1
[INFO] [stderr]     Checking config v0.10.1
[INFO] [stderr]     Checking tokio-serde v0.6.1
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[INFO] [stderr]     Checking tracing-subscriber v0.2.3
[INFO] [stderr]     Checking tarpc v0.20.0
[INFO] [stderr]    Compiling pyo3 v0.9.1
[INFO] [stderr]     Checking xain-fl v0.8.0 (/opt/rustwide/workdir)
[INFO] [stderr] warning: unused return value of `std::mem::replace` that must be used
[INFO] [stderr]   --> src/tests/lib/rpc/aggregator.rs:10:1
[INFO] [stderr]    |
[INFO] [stderr] 10 | / mock! {
[INFO] [stderr] 11 | |     pub NewClient {
[INFO] [stderr] 12 | |         fn spawn(self) -> io::Result<Client>;
[INFO] [stderr] 13 | |     }
[INFO] [stderr] 14 | | }
[INFO] [stderr]    | |_^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_must_use)]` on by default
[INFO] [stderr]    = note: if you don't need the old value, you can just assign the new value directly
[INFO] [stderr]    = note: this warning originates in a macro (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: unused return value of `std::mem::replace` that must be used
[INFO] [stderr]   --> src/tests/lib/rpc/aggregator.rs:10:1
[INFO] [stderr]    |
[INFO] [stderr] 10 | / mock! {
[INFO] [stderr] 11 | |     pub NewClient {
[INFO] [stderr] 12 | |         fn spawn(self) -> io::Result<Client>;
[INFO] [stderr] 13 | |     }
[INFO] [stderr] 14 | | }
[INFO] [stderr]    | |_^
[INFO] [stderr]    |
[INFO] [stderr]    = note: if you don't need the old value, you can just assign the new value directly
[INFO] [stderr]    = note: this warning originates in a macro (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: unused return value of `std::mem::replace` that must be used
[INFO] [stderr]   --> src/tests/lib/rpc/aggregator.rs:16:1
[INFO] [stderr]    |
[INFO] [stderr] 16 | / mock! {
[INFO] [stderr] 17 | |     pub Client {
[INFO] [stderr] 18 | |         fn new<T: Transport<(), ()> + 'static>(config: Config, transport: T) -> MockNewClient;
[INFO] [stderr] 19 | |
[INFO] [stderr] ...  |
[INFO] [stderr] 23 | |     }
[INFO] [stderr] 24 | | }
[INFO] [stderr]    | |_^
[INFO] [stderr]    |
[INFO] [stderr]    = note: if you don't need the old value, you can just assign the new value directly
[INFO] [stderr]    = note: this warning originates in a macro (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: unused return value of `std::mem::replace` that must be used
[INFO] [stderr]   --> src/tests/lib/rpc/coordinator.rs:10:1
[INFO] [stderr]    |
[INFO] [stderr] 10 | / mock! {
[INFO] [stderr] 11 | |     pub NewClient {
[INFO] [stderr] 12 | |         fn spawn(self) -> io::Result<Client>;
[INFO] [stderr] 13 | |     }
[INFO] [stderr] 14 | | }
[INFO] [stderr]    | |_^
[INFO] [stderr]    |
[INFO] [stderr]    = note: if you don't need the old value, you can just assign the new value directly
[INFO] [stderr]    = note: this warning originates in a macro (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: unused return value of `std::mem::replace` that must be used
[INFO] [stderr]   --> src/tests/lib/rpc/coordinator.rs:16:1
[INFO] [stderr]    |
[INFO] [stderr] 16 | / mock! {
[INFO] [stderr] 17 | |     pub Client {
[INFO] [stderr] 18 | |         fn new<T: Transport<(), ()> + 'static>(config: Config, transport: T) -> MockNewClient;
[INFO] [stderr] 19 | |
[INFO] [stderr] 20 | |         fn end_training(&mut self, ctx: Context, id: ClientId, success: bool) -> future::Ready<io::Result<()>>;
[INFO] [stderr] 21 | |     }
[INFO] [stderr] 22 | | }
[INFO] [stderr]    | |_^
[INFO] [stderr]    |
[INFO] [stderr]    = note: if you don't need the old value, you can just assign the new value directly
[INFO] [stderr]    = note: this warning originates in a macro (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: 5 warnings emitted
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 3m 11s
[INFO] running `"docker" "inspect" "81d58211d6ac069140aa2cf81a5e06c836cd252d4218f0eef5eb39fe169687eb"`
[INFO] running `"docker" "rm" "-f" "81d58211d6ac069140aa2cf81a5e06c836cd252d4218f0eef5eb39fe169687eb"`
[INFO] [stdout] 81d58211d6ac069140aa2cf81a5e06c836cd252d4218f0eef5eb39fe169687eb