[INFO] fetching crate failsafe 1.2.0...
[INFO] checking failsafe-1.2.0 against master#80399064afa4a2cd153f30d02c25f7ea0383ed65 for opaque-soundness-fix
[INFO] extracting crate failsafe 1.2.0 into /workspace/builds/worker-0-tc1/source
[INFO] validating manifest of crates.io crate failsafe 1.2.0 on toolchain 80399064afa4a2cd153f30d02c25f7ea0383ed65
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+80399064afa4a2cd153f30d02c25f7ea0383ed65" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate failsafe 1.2.0
[INFO] finished tweaking crates.io crate failsafe 1.2.0
[INFO] tweaked toml for crates.io crate failsafe 1.2.0 written to /workspace/builds/worker-0-tc1/source/Cargo.toml
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+80399064afa4a2cd153f30d02c25f7ea0383ed65" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+80399064afa4a2cd153f30d02c25f7ea0383ed65" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+80399064afa4a2cd153f30d02c25f7ea0383ed65" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] ace168a73ca1264acddb334d6f97b555e72e1e140be4eb288fa9c809de8f2829
[INFO] running `Command { std: "docker" "start" "-a" "ace168a73ca1264acddb334d6f97b555e72e1e140be4eb288fa9c809de8f2829", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "ace168a73ca1264acddb334d6f97b555e72e1e140be4eb288fa9c809de8f2829", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ace168a73ca1264acddb334d6f97b555e72e1e140be4eb288fa9c809de8f2829", kill_on_drop: false }`
[INFO] [stdout] ace168a73ca1264acddb334d6f97b555e72e1e140be4eb288fa9c809de8f2829
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+80399064afa4a2cd153f30d02c25f7ea0383ed65" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 083e08c1c2ddb4664be1419a568be77115472491690fc3b964557f0df94bb86f
[INFO] running `Command { std: "docker" "start" "-a" "083e08c1c2ddb4664be1419a568be77115472491690fc3b964557f0df94bb86f", kill_on_drop: false }`
[INFO] [stderr]    Compiling autocfg v1.1.0
[INFO] [stderr]    Compiling unicode-ident v1.0.12
[INFO] [stderr]    Compiling libc v0.2.153
[INFO] [stderr]     Checking cfg-if v1.0.0
[INFO] [stderr]    Compiling crossbeam-utils v0.8.19
[INFO] [stderr]    Compiling serde v1.0.197
[INFO] [stderr]     Checking memchr v2.7.1
[INFO] [stderr]     Checking futures-core v0.3.30
[INFO] [stderr]    Compiling proc-macro2 v1.0.79
[INFO] [stderr]     Checking either v1.10.0
[INFO] [stderr]    Compiling parking_lot_core v0.9.9
[INFO] [stderr]     Checking ryu v1.0.17
[INFO] [stderr]     Checking itoa v1.0.10
[INFO] [stderr]     Checking futures-sink v0.3.30
[INFO] [stderr]    Compiling slab v0.4.9
[INFO] [stderr]    Compiling quote v1.0.35
[INFO] [stderr]    Compiling lock_api v0.4.11
[INFO] [stderr]    Compiling num-traits v0.2.18
[INFO] [stderr]    Compiling syn v2.0.53
[INFO] [stderr]     Checking pin-project-lite v0.2.13
[INFO] [stderr]    Compiling serde_json v1.0.114
[INFO] [stderr]    Compiling rayon-core v1.12.1
[INFO] [stderr]     Checking crossbeam-epoch v0.9.18
[INFO] [stderr]     Checking futures-channel v0.3.30
[INFO] [stderr]     Checking crossbeam-deque v0.8.5
[INFO] [stderr]     Checking ppv-lite86 v0.2.17
[INFO] [stderr]     Checking getrandom v0.2.12
[INFO] [stderr]     Checking plotters-backend v0.3.5
[INFO] [stderr]     Checking unicode-width v0.1.11
[INFO] [stderr]     Checking smallvec v1.13.2
[INFO] [stderr]     Checking rand_core v0.6.4
[INFO] [stderr]     Checking scopeguard v1.2.0
[INFO] [stderr]     Checking regex-syntax v0.8.2
[INFO] [stderr]     Checking pin-utils v0.1.0
[INFO] [stderr]     Checking futures-io v0.3.30
[INFO] [stderr]     Checking futures-task v0.3.30
[INFO] [stderr]     Checking rand_chacha v0.3.1
[INFO] [stderr]     Checking plotters-svg v0.3.5
[INFO] [stderr]     Checking textwrap v0.11.0
[INFO] [stderr]     Checking csv-core v0.1.11
[INFO] [stderr]     Checking itertools v0.10.5
[INFO] [stderr]     Checking half v1.8.3
[INFO] [stderr]     Checking cast v0.3.0
[INFO] [stderr]     Checking same-file v1.0.6
[INFO] [stderr]     Checking bitflags v1.3.2
[INFO] [stderr]     Checking clap v2.34.0
[INFO] [stderr]     Checking walkdir v2.5.0
[INFO] [stderr]     Checking rayon v1.9.0
[INFO] [stderr]     Checking parking_lot v0.12.1
[INFO] [stderr]     Checking regex-automata v0.4.6
[INFO] [stderr]     Checking rand v0.8.5
[INFO] [stderr]     Checking plotters v0.3.5
[INFO] [stderr]     Checking criterion-plot v0.4.5
[INFO] [stderr]     Checking serde_cbor v0.11.2
[INFO] [stderr]     Checking csv v1.3.0
[INFO] [stderr]     Checking atty v0.2.14
[INFO] [stderr]     Checking num_cpus v1.16.0
[INFO] [stderr]     Checking lazy_static v1.4.0
[INFO] [stderr]     Checking oorandom v11.1.3
[INFO] [stderr]     Checking regex v1.10.4
[INFO] [stderr]     Checking rand_xorshift v0.3.0
[INFO] [stderr]     Checking tinytemplate v1.2.1
[INFO] [stderr]    Compiling futures-macro v0.3.30
[INFO] [stderr]    Compiling pin-project-internal v1.1.5
[INFO] [stderr]    Compiling tokio-macros v2.2.0
[INFO] [stderr]    Compiling serde_derive v1.0.197
[INFO] [stderr]     Checking tokio v1.36.0
[INFO] [stderr]     Checking futures-util v0.3.30
[INFO] [stderr]     Checking pin-project v1.1.5
[INFO] [stderr]     Checking failsafe v1.2.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: the item `Iterator` is imported redundantly
[INFO] [stdout]  --> src/backoff.rs:5:23
[INFO] [stdout]   |
[INFO] [stdout] 5 | use std::iter::{self, Iterator};
[INFO] [stdout]   |                       ^^^^^^^^
[INFO] [stdout]  --> /rustc/80399064afa4a2cd153f30d02c25f7ea0383ed65/library/std/src/prelude/mod.rs:115:13
[INFO] [stdout]   |
[INFO] [stdout]   = note: the item `Iterator` is already defined here
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `Iterator` is imported redundantly
[INFO] [stdout]  --> src/failure_policy.rs:3:5
[INFO] [stdout]   |
[INFO] [stdout] 3 | use std::iter::Iterator;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]  --> /rustc/80399064afa4a2cd153f30d02c25f7ea0383ed65/library/std/src/prelude/mod.rs:115:13
[INFO] [stdout]   |
[INFO] [stdout]   = note: the item `Iterator` is already defined here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Checking criterion v0.3.6
[INFO] [stderr]     Checking futures-executor v0.3.30
[INFO] [stderr]     Checking futures v0.3.30
[INFO] [stdout] error: the item `Arc` is imported redundantly
[INFO] [stdout]    --> src/state_machine.rs:237:21
[INFO] [stdout]     |
[INFO] [stdout] 237 |     use std::sync::{Arc, Mutex};
[INFO] [stdout]     |                     ^^^
[INFO] [stdout] ...
[INFO] [stdout] 241 |     use super::*;
[INFO] [stdout]     |         -------- the item `Arc` is already imported here
[INFO] [stdout]     |
[INFO] [stdout] note: the lint level is defined here
[INFO] [stdout]    --> src/lib.rs:69:24
[INFO] [stdout]     |
[INFO] [stdout] 69  | #![cfg_attr(test, deny(warnings))]
[INFO] [stdout]     |                        ^^^^^^^^
[INFO] [stdout]     = note: `#[deny(unused_imports)]` implied by `#[deny(warnings)]`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: the item `Iterator` is imported redundantly
[INFO] [stdout]  --> src/backoff.rs:5:23
[INFO] [stdout]   |
[INFO] [stdout] 5 | use std::iter::{self, Iterator};
[INFO] [stdout]   |                       ^^^^^^^^
[INFO] [stdout]  --> /rustc/80399064afa4a2cd153f30d02c25f7ea0383ed65/library/std/src/prelude/mod.rs:115:13
[INFO] [stdout]   |
[INFO] [stdout]   = note: the item `Iterator` is already defined here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: the item `Iterator` is imported redundantly
[INFO] [stdout]  --> src/failure_policy.rs:3:5
[INFO] [stdout]   |
[INFO] [stdout] 3 | use std::iter::Iterator;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]  --> /rustc/80399064afa4a2cd153f30d02c25f7ea0383ed65/library/std/src/prelude/mod.rs:115:13
[INFO] [stdout]   |
[INFO] [stdout]   = note: the item `Iterator` is already defined here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: the item `backoff` is imported redundantly
[INFO] [stdout]    --> src/failure_policy.rs:285:9
[INFO] [stdout]     |
[INFO] [stdout] 283 |     use super::*;
[INFO] [stdout]     |         -------- the item `backoff` is already imported here
[INFO] [stdout] 284 |
[INFO] [stdout] 285 |     use super::super::backoff;
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 4 previous errors
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `failsafe` (lib test) due to 5 previous errors
[INFO] running `Command { std: "docker" "inspect" "083e08c1c2ddb4664be1419a568be77115472491690fc3b964557f0df94bb86f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "083e08c1c2ddb4664be1419a568be77115472491690fc3b964557f0df94bb86f", kill_on_drop: false }`
[INFO] [stdout] 083e08c1c2ddb4664be1419a568be77115472491690fc3b964557f0df94bb86f
[INFO] checking failsafe-1.2.0 against master#09bc67b9158392361780e779d32997f14cc75c39 for opaque-soundness-fix
[INFO] extracting crate failsafe 1.2.0 into /workspace/builds/worker-0-tc2/source
[INFO] validating manifest of crates.io crate failsafe 1.2.0 on toolchain 09bc67b9158392361780e779d32997f14cc75c39
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+09bc67b9158392361780e779d32997f14cc75c39" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate failsafe 1.2.0
[INFO] finished tweaking crates.io crate failsafe 1.2.0
[INFO] tweaked toml for crates.io crate failsafe 1.2.0 written to /workspace/builds/worker-0-tc2/source/Cargo.toml
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+09bc67b9158392361780e779d32997f14cc75c39" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+09bc67b9158392361780e779d32997f14cc75c39" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc2/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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+09bc67b9158392361780e779d32997f14cc75c39" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 5072d5a55955d24fb07e5305aa2f3b25e162d4b28d64ddee90398350fe61381c
[INFO] running `Command { std: "docker" "start" "-a" "5072d5a55955d24fb07e5305aa2f3b25e162d4b28d64ddee90398350fe61381c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "5072d5a55955d24fb07e5305aa2f3b25e162d4b28d64ddee90398350fe61381c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "5072d5a55955d24fb07e5305aa2f3b25e162d4b28d64ddee90398350fe61381c", kill_on_drop: false }`
[INFO] [stdout] 5072d5a55955d24fb07e5305aa2f3b25e162d4b28d64ddee90398350fe61381c
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc2/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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+09bc67b9158392361780e779d32997f14cc75c39" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] a4d73864348425ab3410f8307a9af808c622e55a49fa0c1d9e1e0a1f044d3bb1
[INFO] running `Command { std: "docker" "start" "-a" "a4d73864348425ab3410f8307a9af808c622e55a49fa0c1d9e1e0a1f044d3bb1", kill_on_drop: false }`
[INFO] [stderr]    Compiling autocfg v1.1.0
[INFO] [stderr]    Compiling unicode-ident v1.0.12
[INFO] [stderr]    Compiling libc v0.2.153
[INFO] [stderr]     Checking cfg-if v1.0.0
[INFO] [stderr]    Compiling crossbeam-utils v0.8.19
[INFO] [stderr]    Compiling serde v1.0.197
[INFO] [stderr]     Checking memchr v2.7.1
[INFO] [stderr]     Checking futures-core v0.3.30
[INFO] [stderr]    Compiling parking_lot_core v0.9.9
[INFO] [stderr]    Compiling proc-macro2 v1.0.79
[INFO] [stderr]     Checking pin-project-lite v0.2.13
[INFO] [stderr]     Checking either v1.10.0
[INFO] [stderr]     Checking itoa v1.0.10
[INFO] [stderr]    Compiling slab v0.4.9
[INFO] [stderr]    Compiling num-traits v0.2.18
[INFO] [stderr]    Compiling lock_api v0.4.11
[INFO] [stderr]     Checking futures-sink v0.3.30
[INFO] [stderr]    Compiling quote v1.0.35
[INFO] [stderr]     Checking ryu v1.0.17
[INFO] [stderr]    Compiling serde_json v1.0.114
[INFO] [stderr]    Compiling rayon-core v1.12.1
[INFO] [stderr]    Compiling syn v2.0.53
[INFO] [stderr]     Checking crossbeam-epoch v0.9.18
[INFO] [stderr]     Checking crossbeam-deque v0.8.5
[INFO] [stderr]     Checking futures-channel v0.3.30
[INFO] [stderr]     Checking futures-io v0.3.30
[INFO] [stderr]     Checking scopeguard v1.2.0
[INFO] [stderr]     Checking getrandom v0.2.12
[INFO] [stderr]     Checking smallvec v1.13.2
[INFO] [stderr]     Checking ppv-lite86 v0.2.17
[INFO] [stderr]     Checking regex-syntax v0.8.2
[INFO] [stderr]     Checking futures-task v0.3.30
[INFO] [stderr]     Checking rand_core v0.6.4
[INFO] [stderr]     Checking unicode-width v0.1.11
[INFO] [stderr]     Checking plotters-backend v0.3.5
[INFO] [stderr]     Checking pin-utils v0.1.0
[INFO] [stderr]     Checking textwrap v0.11.0
[INFO] [stderr]     Checking rand_chacha v0.3.1
[INFO] [stderr]     Checking plotters-svg v0.3.5
[INFO] [stderr]     Checking csv-core v0.1.11
[INFO] [stderr]     Checking itertools v0.10.5
[INFO] [stderr]     Checking half v1.8.3
[INFO] [stderr]     Checking bitflags v1.3.2
[INFO] [stderr]     Checking cast v0.3.0
[INFO] [stderr]     Checking same-file v1.0.6
[INFO] [stderr]     Checking rayon v1.9.0
[INFO] [stderr]     Checking clap v2.34.0
[INFO] [stderr]     Checking walkdir v2.5.0
[INFO] [stderr]     Checking parking_lot v0.12.1
[INFO] [stderr]     Checking regex-automata v0.4.6
[INFO] [stderr]     Checking rand v0.8.5
[INFO] [stderr]     Checking plotters v0.3.5
[INFO] [stderr]     Checking serde_cbor v0.11.2
[INFO] [stderr]     Checking criterion-plot v0.4.5
[INFO] [stderr]     Checking csv v1.3.0
[INFO] [stderr]     Checking atty v0.2.14
[INFO] [stderr]     Checking num_cpus v1.16.0
[INFO] [stderr]     Checking lazy_static v1.4.0
[INFO] [stderr]     Checking oorandom v11.1.3
[INFO] [stderr]     Checking rand_xorshift v0.3.0
[INFO] [stderr]     Checking tinytemplate v1.2.1
[INFO] [stderr]     Checking regex v1.10.4
[INFO] [stderr]    Compiling futures-macro v0.3.30
[INFO] [stderr]    Compiling pin-project-internal v1.1.5
[INFO] [stderr]    Compiling tokio-macros v2.2.0
[INFO] [stderr]    Compiling serde_derive v1.0.197
[INFO] [stderr]     Checking tokio v1.36.0
[INFO] [stderr]     Checking futures-util v0.3.30
[INFO] [stderr]     Checking pin-project v1.1.5
[INFO] [stderr]     Checking failsafe v1.2.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: the item `Iterator` is imported redundantly
[INFO] [stdout]  --> src/backoff.rs:5:23
[INFO] [stdout]   |
[INFO] [stdout] 5 | use std::iter::{self, Iterator};
[INFO] [stdout]   |                       ^^^^^^^^
[INFO] [stdout]  --> /rustc/09bc67b9158392361780e779d32997f14cc75c39/library/std/src/prelude/mod.rs:115:13
[INFO] [stdout]   |
[INFO] [stdout]   = note: the item `Iterator` is already defined here
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `Iterator` is imported redundantly
[INFO] [stdout]  --> src/failure_policy.rs:3:5
[INFO] [stdout]   |
[INFO] [stdout] 3 | use std::iter::Iterator;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]  --> /rustc/09bc67b9158392361780e779d32997f14cc75c39/library/std/src/prelude/mod.rs:115:13
[INFO] [stdout]   |
[INFO] [stdout]   = note: the item `Iterator` is already defined here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Checking criterion v0.3.6
[INFO] [stderr]     Checking futures-executor v0.3.30
[INFO] [stderr]     Checking futures v0.3.30
[INFO] [stdout] error: the item `Arc` is imported redundantly
[INFO] [stdout]    --> src/state_machine.rs:237:21
[INFO] [stdout]     |
[INFO] [stdout] 237 |     use std::sync::{Arc, Mutex};
[INFO] [stdout]     |                     ^^^
[INFO] [stdout] ...
[INFO] [stdout] 241 |     use super::*;
[INFO] [stdout]     |         -------- the item `Arc` is already imported here
[INFO] [stdout]     |
[INFO] [stdout] note: the lint level is defined here
[INFO] [stdout]    --> src/lib.rs:69:24
[INFO] [stdout]     |
[INFO] [stdout] 69  | #![cfg_attr(test, deny(warnings))]
[INFO] [stdout]     |                        ^^^^^^^^
[INFO] [stdout]     = note: `#[deny(unused_imports)]` implied by `#[deny(warnings)]`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: the item `Iterator` is imported redundantly
[INFO] [stdout]  --> src/backoff.rs:5:23
[INFO] [stdout]   |
[INFO] [stdout] 5 | use std::iter::{self, Iterator};
[INFO] [stdout]   |                       ^^^^^^^^
[INFO] [stdout]  --> /rustc/09bc67b9158392361780e779d32997f14cc75c39/library/std/src/prelude/mod.rs:115:13
[INFO] [stdout]   |
[INFO] [stdout]   = note: the item `Iterator` is already defined here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: the item `Iterator` is imported redundantly
[INFO] [stdout]  --> src/failure_policy.rs:3:5
[INFO] [stdout]   |
[INFO] [stdout] 3 | use std::iter::Iterator;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]  --> /rustc/09bc67b9158392361780e779d32997f14cc75c39/library/std/src/prelude/mod.rs:115:13
[INFO] [stdout]   |
[INFO] [stdout]   = note: the item `Iterator` is already defined here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: the item `backoff` is imported redundantly
[INFO] [stdout]    --> src/failure_policy.rs:285:9
[INFO] [stdout]     |
[INFO] [stdout] 283 |     use super::*;
[INFO] [stdout]     |         -------- the item `backoff` is already imported here
[INFO] [stdout] 284 |
[INFO] [stdout] 285 |     use super::super::backoff;
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 4 previous errors
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `failsafe` (lib test) due to 5 previous errors
[INFO] running `Command { std: "docker" "inspect" "a4d73864348425ab3410f8307a9af808c622e55a49fa0c1d9e1e0a1f044d3bb1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a4d73864348425ab3410f8307a9af808c622e55a49fa0c1d9e1e0a1f044d3bb1", kill_on_drop: false }`
[INFO] [stdout] a4d73864348425ab3410f8307a9af808c622e55a49fa0c1d9e1e0a1f044d3bb1
