[INFO] fetching crate adaptive_backoff 0.2.1...
[INFO] testing adaptive_backoff-0.2.1 against beta-2022-02-22 for beta-1.60-1
[INFO] extracting crate adaptive_backoff 0.2.1 into /workspace/builds/worker-8/source
[INFO] validating manifest of crates.io crate adaptive_backoff 0.2.1 on toolchain beta-2022-02-22
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2022-02-22" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate adaptive_backoff 0.2.1
[INFO] finished tweaking crates.io crate adaptive_backoff 0.2.1
[INFO] tweaked toml for crates.io crate adaptive_backoff 0.2.1 written to /workspace/builds/worker-8/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2022-02-22" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2022-02-22" "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-8/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/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@sha256:0cd99ca24d8e8c98e67c542213511d985b8778b5bdcbb160e038429496686047" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2022-02-22" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 99185151194d55e733f24ff282e4281516099c4e48ab9ccd32c1a3ab56213051
[INFO] running `Command { std: "docker" "start" "-a" "99185151194d55e733f24ff282e4281516099c4e48ab9ccd32c1a3ab56213051", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "99185151194d55e733f24ff282e4281516099c4e48ab9ccd32c1a3ab56213051", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "99185151194d55e733f24ff282e4281516099c4e48ab9ccd32c1a3ab56213051", kill_on_drop: false }`
[INFO] [stdout] 99185151194d55e733f24ff282e4281516099c4e48ab9ccd32c1a3ab56213051
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/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@sha256:0cd99ca24d8e8c98e67c542213511d985b8778b5bdcbb160e038429496686047" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2022-02-22" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 75a3ed514fc658c4980b33c3d46d8f4d610d7ca2a2d9323a3f821214dc4e9540
[INFO] running `Command { std: "docker" "start" "-a" "75a3ed514fc658c4980b33c3d46d8f4d610d7ca2a2d9323a3f821214dc4e9540", kill_on_drop: false }`
[INFO] [stderr]    Compiling syn v1.0.86
[INFO] [stderr]    Compiling anyhow v1.0.55
[INFO] [stderr]    Compiling thiserror-impl v1.0.30
[INFO] [stderr]    Compiling thiserror v1.0.30
[INFO] [stderr]    Compiling adaptive_backoff v0.2.1 (/opt/rustwide/workdir)
[INFO] [stdout] warning: field is never read: `success_step`
[INFO] [stdout]   --> src/lib/adaptive.rs:48:5
[INFO] [stdout]    |
[INFO] [stdout] 48 |     success_step: f64,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] note: `Adaptive` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout]   --> src/lib/adaptive.rs:15:10
[INFO] [stdout]    |
[INFO] [stdout] 15 | #[derive(Debug, Default)]
[INFO] [stdout]    |          ^^^^^
[INFO] [stdout]    = note: this warning originates in the derive macro `Debug` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `fail_step`
[INFO] [stdout]   --> src/lib/adaptive.rs:49:5
[INFO] [stdout]    |
[INFO] [stdout] 49 |     fail_step: f64,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout] note: `Adaptive` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout]   --> src/lib/adaptive.rs:15:10
[INFO] [stdout]    |
[INFO] [stdout] 15 | #[derive(Debug, Default)]
[INFO] [stdout]    |          ^^^^^
[INFO] [stdout]    = note: this warning originates in the derive macro `Debug` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 9.91s
[INFO] running `Command { std: "docker" "inspect" "75a3ed514fc658c4980b33c3d46d8f4d610d7ca2a2d9323a3f821214dc4e9540", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "75a3ed514fc658c4980b33c3d46d8f4d610d7ca2a2d9323a3f821214dc4e9540", kill_on_drop: false }`
[INFO] [stdout] 75a3ed514fc658c4980b33c3d46d8f4d610d7ca2a2d9323a3f821214dc4e9540
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/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@sha256:0cd99ca24d8e8c98e67c542213511d985b8778b5bdcbb160e038429496686047" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2022-02-22" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 596c17ff92ffb5c14bf23df5507919d293913baf1c598572799cb7f6b11bb726
[INFO] running `Command { std: "docker" "start" "-a" "596c17ff92ffb5c14bf23df5507919d293913baf1c598572799cb7f6b11bb726", kill_on_drop: false }`
[INFO] [stderr]    Compiling log v0.4.14
[INFO] [stdout] warning: field is never read: `success_step`
[INFO] [stdout]   --> src/lib/adaptive.rs:48:5
[INFO] [stdout]    |
[INFO] [stdout] 48 |     success_step: f64,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] note: `Adaptive` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout]   --> src/lib/adaptive.rs:15:10
[INFO] [stdout]    |
[INFO] [stdout] 15 | #[derive(Debug, Default)]
[INFO] [stdout]    |          ^^^^^
[INFO] [stdout]    = note: this warning originates in the derive macro `Debug` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `fail_step`
[INFO] [stdout]   --> src/lib/adaptive.rs:49:5
[INFO] [stdout]    |
[INFO] [stdout] 49 |     fail_step: f64,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout] note: `Adaptive` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout]   --> src/lib/adaptive.rs:15:10
[INFO] [stdout]    |
[INFO] [stdout] 15 | #[derive(Debug, Default)]
[INFO] [stdout]    |          ^^^^^
[INFO] [stdout]    = note: this warning originates in the derive macro `Debug` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]    Compiling adaptive_backoff v0.2.1 (/opt/rustwide/workdir)
[INFO] [stdout] warning: field is never read: `success_step`
[INFO] [stdout]   --> src/lib/adaptive.rs:48:5
[INFO] [stdout]    |
[INFO] [stdout] 48 |     success_step: f64,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] note: `Adaptive` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout]   --> src/lib/adaptive.rs:15:10
[INFO] [stdout]    |
[INFO] [stdout] 15 | #[derive(Debug, Default)]
[INFO] [stdout]    |          ^^^^^
[INFO] [stdout]    = note: this warning originates in the derive macro `Debug` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `fail_step`
[INFO] [stdout]   --> src/lib/adaptive.rs:49:5
[INFO] [stdout]    |
[INFO] [stdout] 49 |     fail_step: f64,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout] note: `Adaptive` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout]   --> src/lib/adaptive.rs:15:10
[INFO] [stdout]    |
[INFO] [stdout] 15 | #[derive(Debug, Default)]
[INFO] [stdout]    |          ^^^^^
[INFO] [stdout]    = note: this warning originates in the derive macro `Debug` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 29.76s
[INFO] running `Command { std: "docker" "inspect" "596c17ff92ffb5c14bf23df5507919d293913baf1c598572799cb7f6b11bb726", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "596c17ff92ffb5c14bf23df5507919d293913baf1c598572799cb7f6b11bb726", kill_on_drop: false }`
[INFO] [stdout] 596c17ff92ffb5c14bf23df5507919d293913baf1c598572799cb7f6b11bb726
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/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@sha256:0cd99ca24d8e8c98e67c542213511d985b8778b5bdcbb160e038429496686047" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2022-02-22" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] 0e6813bc40dfad5ea78a8ee57c05884462e388839cf4991bd233b89f538f2488
[INFO] running `Command { std: "docker" "start" "-a" "0e6813bc40dfad5ea78a8ee57c05884462e388839cf4991bd233b89f538f2488", kill_on_drop: false }`
[INFO] [stderr] warning: field is never read: `success_step`
[INFO] [stderr]   --> src/lib/adaptive.rs:48:5
[INFO] [stderr]    |
[INFO] [stderr] 48 |     success_step: f64,
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] note: `Adaptive` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stderr]   --> src/lib/adaptive.rs:15:10
[INFO] [stderr]    |
[INFO] [stderr] 15 | #[derive(Debug, Default)]
[INFO] [stderr]    |          ^^^^^
[INFO] [stderr]    = note: this warning originates in the derive macro `Debug` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: field is never read: `fail_step`
[INFO] [stderr]   --> src/lib/adaptive.rs:49:5
[INFO] [stderr]    |
[INFO] [stderr] 49 |     fail_step: f64,
[INFO] [stderr]    |     ^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr] note: `Adaptive` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stderr]   --> src/lib/adaptive.rs:15:10
[INFO] [stderr]    |
[INFO] [stderr] 15 | #[derive(Debug, Default)]
[INFO] [stderr]    |          ^^^^^
[INFO] [stderr]    = note: this warning originates in the derive macro `Debug` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: `adaptive_backoff` (lib) generated 2 warnings
[INFO] [stderr] warning: `adaptive_backoff` (lib test) generated 2 warnings (2 duplicates)
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.08s
[INFO] [stderr]      Running unittests (/opt/rustwide/target/debug/deps/adaptive_backoff-f4b90dc66cb30eb2)
[INFO] [stdout] 
[INFO] [stdout] running 2 tests
[INFO] [stdout] test adaptive::test_adaptive_exp_backoff ... ok
[INFO] [stdout] test backoff::test_exp_backoff ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 2 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.03s
[INFO] [stdout] 
[INFO] [stderr]    Doc-tests adaptive_backoff
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "0e6813bc40dfad5ea78a8ee57c05884462e388839cf4991bd233b89f538f2488", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "0e6813bc40dfad5ea78a8ee57c05884462e388839cf4991bd233b89f538f2488", kill_on_drop: false }`
[INFO] [stdout] 0e6813bc40dfad5ea78a8ee57c05884462e388839cf4991bd233b89f538f2488