[INFO] fetching crate skywalking 0.4.0...
[INFO] checking skywalking-0.4.0 against try#8ea250bdb76176ecb0225baa34aa634b024ae0e2 for pr-101692
[INFO] extracting crate skywalking 0.4.0 into /workspace/builds/worker-7/source
[INFO] validating manifest of crates.io crate skywalking 0.4.0 on toolchain 8ea250bdb76176ecb0225baa34aa634b024ae0e2
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+8ea250bdb76176ecb0225baa34aa634b024ae0e2" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] removed /workspace/builds/worker-7/source/rust-toolchain.toml
[INFO] started tweaking crates.io crate skywalking 0.4.0
[INFO] removed 0 missing examples
[INFO] removed 0 missing tests
[INFO] finished tweaking crates.io crate skywalking 0.4.0
[INFO] tweaked toml for crates.io crate skywalking 0.4.0 written to /workspace/builds/worker-7/source/Cargo.toml
[INFO] crate crates.io crate skywalking 0.4.0 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+8ea250bdb76176ecb0225baa34aa634b024ae0e2" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/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@sha256:824c28ce115f6b999260af6986f3384c158e782489540e41c0b698ca1d9fd927" "/opt/rustwide/cargo-home/bin/cargo" "+8ea250bdb76176ecb0225baa34aa634b024ae0e2" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] bd25deb83ad9491e7ce324f1efa734ae7f02f90688c644bb86da9c4f6739915e
[INFO] running `Command { std: "docker" "start" "-a" "bd25deb83ad9491e7ce324f1efa734ae7f02f90688c644bb86da9c4f6739915e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "bd25deb83ad9491e7ce324f1efa734ae7f02f90688c644bb86da9c4f6739915e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "bd25deb83ad9491e7ce324f1efa734ae7f02f90688c644bb86da9c4f6739915e", kill_on_drop: false }`
[INFO] [stdout] bd25deb83ad9491e7ce324f1efa734ae7f02f90688c644bb86da9c4f6739915e
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/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=forbid" "-e" "RUSTDOCFLAGS=--cap-lints=forbid" "-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@sha256:824c28ce115f6b999260af6986f3384c158e782489540e41c0b698ca1d9fd927" "/opt/rustwide/cargo-home/bin/cargo" "+8ea250bdb76176ecb0225baa34aa634b024ae0e2" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 7b8e5c2b3e6617173709688f4a993b43cd6de5bdd8d3753223821449111d1312
[INFO] running `Command { std: "docker" "start" "-a" "7b8e5c2b3e6617173709688f4a993b43cd6de5bdd8d3753223821449111d1312", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.40
[INFO] [stderr]    Compiling quote v1.0.20
[INFO] [stderr]    Compiling unicode-ident v1.0.1
[INFO] [stderr]    Compiling syn v1.0.98
[INFO] [stderr]    Compiling libc v0.2.126
[INFO] [stderr]    Compiling autocfg v1.1.0
[INFO] [stderr]     Checking cfg-if v1.0.0
[INFO] [stderr]    Compiling log v0.4.17
[INFO] [stderr]     Checking pin-project-lite v0.2.9
[INFO] [stderr]     Checking bytes v1.2.1
[INFO] [stderr]    Compiling futures-core v0.3.21
[INFO] [stderr]     Checking once_cell v1.13.0
[INFO] [stderr]    Compiling parking_lot_core v0.9.3
[INFO] [stderr]     Checking smallvec v1.9.0
[INFO] [stderr]    Compiling memchr v2.5.0
[INFO] [stderr]     Checking scopeguard v1.1.0
[INFO] [stderr]    Compiling futures-task v0.3.21
[INFO] [stderr]    Compiling anyhow v1.0.58
[INFO] [stderr]    Compiling either v1.7.0
[INFO] [stderr]    Compiling futures-util v0.3.21
[INFO] [stderr]     Checking fnv v1.0.7
[INFO] [stderr]     Checking itoa v1.0.2
[INFO] [stderr]     Checking slab v0.4.6
[INFO] [stderr]     Checking pin-utils v0.1.0
[INFO] [stderr]     Checking futures-sink v0.3.21
[INFO] [stderr]     Checking hashbrown v0.12.1
[INFO] [stderr]    Compiling httparse v1.7.1
[INFO] [stderr]    Compiling futures-channel v0.3.21
[INFO] [stderr]    Compiling serde_derive v1.0.143
[INFO] [stderr]     Checking tower-service v0.3.2
[INFO] [stderr]     Checking ppv-lite86 v0.2.16
[INFO] [stderr]    Compiling prettyplease v0.1.15
[INFO] [stderr]     Checking try-lock v0.2.3
[INFO] [stderr]    Compiling fastrand v1.7.0
[INFO] [stderr]    Compiling fixedbitset v0.4.2
[INFO] [stderr]    Compiling remove_dir_all v0.5.3
[INFO] [stderr]    Compiling async-trait v0.1.56
[INFO] [stderr]    Compiling regex-syntax v0.6.26
[INFO] [stderr]    Compiling serde v1.0.143
[INFO] [stderr]    Compiling heck v0.4.0
[INFO] [stderr]     Checking httpdate v1.0.2
[INFO] [stderr]    Compiling lazy_static v1.4.0
[INFO] [stderr]     Checking tower-layer v0.3.1
[INFO] [stderr]    Compiling multimap v0.8.3
[INFO] [stderr]     Checking http-range-header v0.3.0
[INFO] [stderr]     Checking bitflags v1.3.2
[INFO] [stderr]     Checking mime v0.3.16
[INFO] [stderr]    Compiling portable-atomic v0.3.13
[INFO] [stderr]     Checking matchit v0.5.0
[INFO] [stderr]     Checking sync_wrapper v0.1.1
[INFO] [stderr]     Checking percent-encoding v2.1.0
[INFO] [stderr]     Checking base64 v0.13.0
[INFO] [stderr]     Checking tracing-core v0.1.29
[INFO] [stderr]    Compiling itertools v0.10.3
[INFO] [stderr]     Checking http v0.2.8
[INFO] [stderr]    Compiling lock_api v0.4.7
[INFO] [stderr]    Compiling tokio v1.20.1
[INFO] [stderr]    Compiling indexmap v1.9.1
[INFO] [stderr]     Checking want v0.3.0
[INFO] [stderr]     Checking http-body v0.4.5
[INFO] [stderr]    Compiling which v4.2.5
[INFO] [stderr]    Compiling tempfile v3.3.0
[INFO] [stderr]    Compiling regex v1.5.6
[INFO] [stderr]    Compiling petgraph v0.6.2
[INFO] [stderr]     Checking mio v0.8.4
[INFO] [stderr]     Checking num_cpus v1.13.1
[INFO] [stderr]     Checking signal-hook-registry v1.4.0
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[INFO] [stderr]     Checking getrandom v0.2.7
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[INFO] [stderr]     Checking parking_lot v0.12.1
[INFO] [stderr]     Checking rand_chacha v0.3.1
[INFO] [stderr]     Checking rand v0.8.5
[INFO] [stderr]    Compiling tokio-macros v1.8.0
[INFO] [stderr]    Compiling tracing-attributes v0.1.22
[INFO] [stderr]    Compiling futures-macro v0.3.21
[INFO] [stderr]    Compiling prost-derive v0.11.0
[INFO] [stderr]    Compiling pin-project-internal v1.0.11
[INFO] [stderr]    Compiling async-stream-impl v0.3.3
[INFO] [stderr]    Compiling thiserror-impl v1.0.32
[INFO] [stderr]     Checking async-stream v0.3.3
[INFO] [stderr]     Checking pin-project v1.0.11
[INFO] [stderr]     Checking thiserror v1.0.32
[INFO] [stderr]    Compiling prost v0.11.0
[INFO] [stderr]     Checking tracing v0.1.36
[INFO] [stderr]     Checking tracing-futures v0.2.5
[INFO] [stderr]    Compiling prost-types v0.11.1
[INFO] [stderr]     Checking axum-core v0.2.6
[INFO] [stderr]    Compiling prost-build v0.11.1
[INFO] [stderr]    Compiling tonic-build v0.8.0
[INFO] [stderr]     Checking tokio-util v0.7.3
[INFO] [stderr]     Checking tokio-io-timeout v1.2.0
[INFO] [stderr]     Checking tokio-stream v0.1.9
[INFO] [stderr]    Compiling skywalking v0.4.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Checking h2 v0.3.13
[INFO] [stderr]     Checking tower v0.4.13
[INFO] [stderr]     Checking uuid v1.1.2
[INFO] [stderr]     Checking tower-http v0.3.4
[INFO] [stderr]     Checking hyper v0.14.19
[INFO] [stderr]     Checking hyper-timeout v0.4.1
[INFO] [stderr]     Checking axum v0.5.11
[INFO] [stderr]     Checking tonic v0.8.0
[INFO] [stdout] error[E0391]: cycle detected when type-checking `metrics::metricer::<impl at src/metrics/metricer.rs:42:1: 42:14>::boot`
[INFO] [stdout]   --> src/metrics/metricer.rs:80:22
[INFO] [stdout]    |
[INFO] [stdout] 80 |         let handle = spawn(async move {
[INFO] [stdout]    |                      ^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: ...which requires evaluating trait selection obligation `[generator interior@src/metrics/metricer.rs:80:39: 99:10]: core::marker::Send`...
[INFO] [stdout] note: ...which requires generator glue MIR for `metrics::metricer::<impl at src/metrics/metricer.rs:42:1: 42:14>::boot::{closure#0}`...
[INFO] [stdout]   --> src/metrics/metricer.rs:80:39
[INFO] [stdout]    |
[INFO] [stdout] 80 |           let handle = spawn(async move {
[INFO] [stdout]    |  _______________________________________^
[INFO] [stdout] 81 | |             let mut ticker = interval(self.report_interval);
[INFO] [stdout] 82 | |             let metricer = Arc::new(self);
[INFO] [stdout] 83 | |             loop {
[INFO] [stdout] ...  |
[INFO] [stdout] 98 | |             }
[INFO] [stdout] 99 | |         });
[INFO] [stdout]    | |_________^
[INFO] [stdout] note: ...which requires elaborating drops for `metrics::metricer::<impl at src/metrics/metricer.rs:42:1: 42:14>::boot::{closure#0}`...
[INFO] [stdout]   --> src/metrics/metricer.rs:80:39
[INFO] [stdout]    |
[INFO] [stdout] 80 |           let handle = spawn(async move {
[INFO] [stdout]    |  _______________________________________^
[INFO] [stdout] 81 | |             let mut ticker = interval(self.report_interval);
[INFO] [stdout] 82 | |             let metricer = Arc::new(self);
[INFO] [stdout] 83 | |             loop {
[INFO] [stdout] ...  |
[INFO] [stdout] 98 | |             }
[INFO] [stdout] 99 | |         });
[INFO] [stdout]    | |_________^
[INFO] [stdout] note: ...which requires borrow-checking `metrics::metricer::<impl at src/metrics/metricer.rs:42:1: 42:14>::boot::{closure#0}`...
[INFO] [stdout]   --> src/metrics/metricer.rs:80:39
[INFO] [stdout]    |
[INFO] [stdout] 80 |           let handle = spawn(async move {
[INFO] [stdout]    |  _______________________________________^
[INFO] [stdout] 81 | |             let mut ticker = interval(self.report_interval);
[INFO] [stdout] 82 | |             let metricer = Arc::new(self);
[INFO] [stdout] 83 | |             loop {
[INFO] [stdout] ...  |
[INFO] [stdout] 98 | |             }
[INFO] [stdout] 99 | |         });
[INFO] [stdout]    | |_________^
[INFO] [stdout] note: ...which requires processing `metrics::metricer::<impl at src/metrics/metricer.rs:42:1: 42:14>::boot::{closure#0}`...
[INFO] [stdout]   --> src/metrics/metricer.rs:80:39
[INFO] [stdout]    |
[INFO] [stdout] 80 |           let handle = spawn(async move {
[INFO] [stdout]    |  _______________________________________^
[INFO] [stdout] 81 | |             let mut ticker = interval(self.report_interval);
[INFO] [stdout] 82 | |             let metricer = Arc::new(self);
[INFO] [stdout] 83 | |             loop {
[INFO] [stdout] ...  |
[INFO] [stdout] 98 | |             }
[INFO] [stdout] 99 | |         });
[INFO] [stdout]    | |_________^
[INFO] [stdout] note: ...which requires processing MIR for `metrics::metricer::<impl at src/metrics/metricer.rs:42:1: 42:14>::boot::{closure#0}`...
[INFO] [stdout]   --> src/metrics/metricer.rs:80:39
[INFO] [stdout]    |
[INFO] [stdout] 80 |           let handle = spawn(async move {
[INFO] [stdout]    |  _______________________________________^
[INFO] [stdout] 81 | |             let mut ticker = interval(self.report_interval);
[INFO] [stdout] 82 | |             let metricer = Arc::new(self);
[INFO] [stdout] 83 | |             loop {
[INFO] [stdout] ...  |
[INFO] [stdout] 98 | |             }
[INFO] [stdout] 99 | |         });
[INFO] [stdout]    | |_________^
[INFO] [stdout] note: ...which requires unsafety-checking `metrics::metricer::<impl at src/metrics/metricer.rs:42:1: 42:14>::boot::{closure#0}`...
[INFO] [stdout]   --> src/metrics/metricer.rs:80:39
[INFO] [stdout]    |
[INFO] [stdout] 80 |           let handle = spawn(async move {
[INFO] [stdout]    |  _______________________________________^
[INFO] [stdout] 81 | |             let mut ticker = interval(self.report_interval);
[INFO] [stdout] 82 | |             let metricer = Arc::new(self);
[INFO] [stdout] 83 | |             loop {
[INFO] [stdout] ...  |
[INFO] [stdout] 98 | |             }
[INFO] [stdout] 99 | |         });
[INFO] [stdout]    | |_________^
[INFO] [stdout] note: ...which requires building MIR for `metrics::metricer::<impl at src/metrics/metricer.rs:42:1: 42:14>::boot::{closure#0}`...
[INFO] [stdout]   --> src/metrics/metricer.rs:80:39
[INFO] [stdout]    |
[INFO] [stdout] 80 |           let handle = spawn(async move {
[INFO] [stdout]    |  _______________________________________^
[INFO] [stdout] 81 | |             let mut ticker = interval(self.report_interval);
[INFO] [stdout] 82 | |             let metricer = Arc::new(self);
[INFO] [stdout] 83 | |             loop {
[INFO] [stdout] ...  |
[INFO] [stdout] 98 | |             }
[INFO] [stdout] 99 | |         });
[INFO] [stdout]    | |_________^
[INFO] [stdout] note: ...which requires type-checking `metrics::metricer::<impl at src/metrics/metricer.rs:42:1: 42:14>::boot::{closure#0}`...
[INFO] [stdout]   --> src/metrics/metricer.rs:80:39
[INFO] [stdout]    |
[INFO] [stdout] 80 |           let handle = spawn(async move {
[INFO] [stdout]    |  _______________________________________^
[INFO] [stdout] 81 | |             let mut ticker = interval(self.report_interval);
[INFO] [stdout] 82 | |             let metricer = Arc::new(self);
[INFO] [stdout] 83 | |             loop {
[INFO] [stdout] ...  |
[INFO] [stdout] 98 | |             }
[INFO] [stdout] 99 | |         });
[INFO] [stdout]    | |_________^
[INFO] [stdout]    = note: ...which again requires type-checking `metrics::metricer::<impl at src/metrics/metricer.rs:42:1: 42:14>::boot`, completing the cycle
[INFO] [stdout]    = note: cycle used when type-checking all item bodies
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0391]: cycle detected when type-checking `metrics::metricer::<impl at src/metrics/metricer.rs:42:1: 42:14>::boot`
[INFO] [stdout]   --> src/metrics/metricer.rs:80:22
[INFO] [stdout]    |
[INFO] [stdout] 80 |         let handle = spawn(async move {
[INFO] [stdout]    |                      ^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: ...which requires evaluating trait selection obligation `[generator interior@src/metrics/metricer.rs:80:39: 99:10]: core::marker::Send`...
[INFO] [stdout] note: ...which requires generator glue MIR for `metrics::metricer::<impl at src/metrics/metricer.rs:42:1: 42:14>::boot::{closure#0}`...
[INFO] [stdout]   --> src/metrics/metricer.rs:80:39
[INFO] [stdout]    |
[INFO] [stdout] 80 |           let handle = spawn(async move {
[INFO] [stdout]    |  _______________________________________^
[INFO] [stdout] 81 | |             let mut ticker = interval(self.report_interval);
[INFO] [stdout] 82 | |             let metricer = Arc::new(self);
[INFO] [stdout] 83 | |             loop {
[INFO] [stdout] ...  |
[INFO] [stdout] 98 | |             }
[INFO] [stdout] 99 | |         });
[INFO] [stdout]    | |_________^
[INFO] [stdout] note: ...which requires elaborating drops for `metrics::metricer::<impl at src/metrics/metricer.rs:42:1: 42:14>::boot::{closure#0}`...
[INFO] [stdout]   --> src/metrics/metricer.rs:80:39
[INFO] [stdout]    |
[INFO] [stdout] 80 |           let handle = spawn(async move {
[INFO] [stdout]    |  _______________________________________^
[INFO] [stdout] 81 | |             let mut ticker = interval(self.report_interval);
[INFO] [stdout] 82 | |             let metricer = Arc::new(self);
[INFO] [stdout] 83 | |             loop {
[INFO] [stdout] ...  |
[INFO] [stdout] 98 | |             }
[INFO] [stdout] 99 | |         });
[INFO] [stdout]    | |_________^
[INFO] [stdout] note: ...which requires borrow-checking `metrics::metricer::<impl at src/metrics/metricer.rs:42:1: 42:14>::boot::{closure#0}`...
[INFO] [stdout]   --> src/metrics/metricer.rs:80:39
[INFO] [stdout]    |
[INFO] [stdout] 80 |           let handle = spawn(async move {
[INFO] [stdout]    |  _______________________________________^
[INFO] [stdout] 81 | |             let mut ticker = interval(self.report_interval);
[INFO] [stdout] 82 | |             let metricer = Arc::new(self);
[INFO] [stdout] 83 | |             loop {
[INFO] [stdout] ...  |
[INFO] [stdout] 98 | |             }
[INFO] [stdout] 99 | |         });
[INFO] [stdout]    | |_________^
[INFO] [stdout] note: ...which requires processing `metrics::metricer::<impl at src/metrics/metricer.rs:42:1: 42:14>::boot::{closure#0}`...
[INFO] [stdout]   --> src/metrics/metricer.rs:80:39
[INFO] [stdout]    |
[INFO] [stdout] 80 |           let handle = spawn(async move {
[INFO] [stdout]    |  _______________________________________^
[INFO] [stdout] 81 | |             let mut ticker = interval(self.report_interval);
[INFO] [stdout] 82 | |             let metricer = Arc::new(self);
[INFO] [stdout] 83 | |             loop {
[INFO] [stdout] ...  |
[INFO] [stdout] 98 | |             }
[INFO] [stdout] 99 | |         });
[INFO] [stdout]    | |_________^
[INFO] [stdout] note: ...which requires processing MIR for `metrics::metricer::<impl at src/metrics/metricer.rs:42:1: 42:14>::boot::{closure#0}`...
[INFO] [stdout]   --> src/metrics/metricer.rs:80:39
[INFO] [stdout]    |
[INFO] [stdout] 80 |           let handle = spawn(async move {
[INFO] [stdout]    |  _______________________________________^
[INFO] [stdout] 81 | |             let mut ticker = interval(self.report_interval);
[INFO] [stdout] 82 | |             let metricer = Arc::new(self);
[INFO] [stdout] 83 | |             loop {
[INFO] [stdout] ...  |
[INFO] [stdout] 98 | |             }
[INFO] [stdout] 99 | |         });
[INFO] [stdout]    | |_________^
[INFO] [stdout] note: ...which requires unsafety-checking `metrics::metricer::<impl at src/metrics/metricer.rs:42:1: 42:14>::boot::{closure#0}`...
[INFO] [stdout]   --> src/metrics/metricer.rs:80:39
[INFO] [stdout]    |
[INFO] [stdout] 80 |           let handle = spawn(async move {
[INFO] [stdout]    |  _______________________________________^
[INFO] [stdout] 81 | |             let mut ticker = interval(self.report_interval);
[INFO] [stdout] 82 | |             let metricer = Arc::new(self);
[INFO] [stdout] 83 | |             loop {
[INFO] [stdout] ...  |
[INFO] [stdout] 98 | |             }
[INFO] [stdout] 99 | |         });
[INFO] [stdout]    | |_________^
[INFO] [stdout] note: ...which requires building MIR for `metrics::metricer::<impl at src/metrics/metricer.rs:42:1: 42:14>::boot::{closure#0}`...
[INFO] [stdout]   --> src/metrics/metricer.rs:80:39
[INFO] [stdout]    |
[INFO] [stdout] 80 |           let handle = spawn(async move {
[INFO] [stdout]    |  _______________________________________^
[INFO] [stdout] 81 | |             let mut ticker = interval(self.report_interval);
[INFO] [stdout] 82 | |             let metricer = Arc::new(self);
[INFO] [stdout] 83 | |             loop {
[INFO] [stdout] ...  |
[INFO] [stdout] 98 | |             }
[INFO] [stdout] 99 | |         });
[INFO] [stdout]    | |_________^
[INFO] [stdout] note: ...which requires type-checking `metrics::metricer::<impl at src/metrics/metricer.rs:42:1: 42:14>::boot::{closure#0}`...
[INFO] [stdout]   --> src/metrics/metricer.rs:80:39
[INFO] [stdout]    |
[INFO] [stdout] 80 |           let handle = spawn(async move {
[INFO] [stdout]    |  _______________________________________^
[INFO] [stdout] 81 | |             let mut ticker = interval(self.report_interval);
[INFO] [stdout] 82 | |             let metricer = Arc::new(self);
[INFO] [stdout] 83 | |             loop {
[INFO] [stdout] ...  |
[INFO] [stdout] 98 | |             }
[INFO] [stdout] 99 | |         });
[INFO] [stdout]    | |_________^
[INFO] [stdout]    = note: ...which again requires type-checking `metrics::metricer::<impl at src/metrics/metricer.rs:42:1: 42:14>::boot`, completing the cycle
[INFO] [stdout]    = note: cycle used when type-checking all item bodies
[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 E0391`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `skywalking` due to 2 previous errors
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stdout] error: aborting due to previous error
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0391`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `skywalking` due to 2 previous errors
[INFO] running `Command { std: "docker" "inspect" "7b8e5c2b3e6617173709688f4a993b43cd6de5bdd8d3753223821449111d1312", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "7b8e5c2b3e6617173709688f4a993b43cd6de5bdd8d3753223821449111d1312", kill_on_drop: false }`
[INFO] [stdout] 7b8e5c2b3e6617173709688f4a993b43cd6de5bdd8d3753223821449111d1312