[INFO] fetching crate adaptive_backoff 0.2.1...
[INFO] testing adaptive_backoff-0.2.1 against try#8262275854dc0e5381c9d42d56257d94932c5a87 for pr-90799
[INFO] extracting crate adaptive_backoff 0.2.1 into /workspace/builds/worker-9/source
[INFO] validating manifest of crates.io crate adaptive_backoff 0.2.1 on toolchain 8262275854dc0e5381c9d42d56257d94932c5a87
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+8262275854dc0e5381c9d42d56257d94932c5a87" "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-9/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+8262275854dc0e5381c9d42d56257d94932c5a87" "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" "+8262275854dc0e5381c9d42d56257d94932c5a87" "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-9/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/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@sha256:5736fa189c1c60b01babf4b8b698fe57b6ecc41933a7ff2e0b8d7a221459412b" "/opt/rustwide/cargo-home/bin/cargo" "+8262275854dc0e5381c9d42d56257d94932c5a87" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 95bbb208ba3e34d55e5caac4bec9e02d5d313bd80a83b65ca115a39edb4fcb42
[INFO] running `Command { std: "docker" "start" "-a" "95bbb208ba3e34d55e5caac4bec9e02d5d313bd80a83b65ca115a39edb4fcb42", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "95bbb208ba3e34d55e5caac4bec9e02d5d313bd80a83b65ca115a39edb4fcb42", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "95bbb208ba3e34d55e5caac4bec9e02d5d313bd80a83b65ca115a39edb4fcb42", kill_on_drop: false }`
[INFO] [stdout] 95bbb208ba3e34d55e5caac4bec9e02d5d313bd80a83b65ca115a39edb4fcb42
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/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" "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@sha256:5736fa189c1c60b01babf4b8b698fe57b6ecc41933a7ff2e0b8d7a221459412b" "/opt/rustwide/cargo-home/bin/cargo" "+8262275854dc0e5381c9d42d56257d94932c5a87" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 11987ed1abe91d2f0864f8c8562d997a681108f1e7b6cb7511c4e51bb312b5c2
[INFO] running `Command { std: "docker" "start" "-a" "11987ed1abe91d2f0864f8c8562d997a681108f1e7b6cb7511c4e51bb312b5c2", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling syn v1.0.82
[INFO] [stderr]    Compiling anyhow v1.0.51
[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] 
[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] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 5.73s
[INFO] running `Command { std: "docker" "inspect" "11987ed1abe91d2f0864f8c8562d997a681108f1e7b6cb7511c4e51bb312b5c2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "11987ed1abe91d2f0864f8c8562d997a681108f1e7b6cb7511c4e51bb312b5c2", kill_on_drop: false }`
[INFO] [stdout] 11987ed1abe91d2f0864f8c8562d997a681108f1e7b6cb7511c4e51bb312b5c2
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/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" "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@sha256:5736fa189c1c60b01babf4b8b698fe57b6ecc41933a7ff2e0b8d7a221459412b" "/opt/rustwide/cargo-home/bin/cargo" "+8262275854dc0e5381c9d42d56257d94932c5a87" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 67a63b1523017e1879fb622b017b634719f7388c936d5464ceaf04c5a941505d
[INFO] running `Command { std: "docker" "start" "-a" "67a63b1523017e1879fb622b017b634719f7388c936d5464ceaf04c5a941505d", kill_on_drop: false }`
[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] 
[INFO] [stdout] 
[INFO] [stderr]    Compiling adaptive_backoff v0.2.1 (/opt/rustwide/workdir)
[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] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[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] 
[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] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.61s
[INFO] running `Command { std: "docker" "inspect" "67a63b1523017e1879fb622b017b634719f7388c936d5464ceaf04c5a941505d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "67a63b1523017e1879fb622b017b634719f7388c936d5464ceaf04c5a941505d", kill_on_drop: false }`
[INFO] [stdout] 67a63b1523017e1879fb622b017b634719f7388c936d5464ceaf04c5a941505d
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/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" "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@sha256:5736fa189c1c60b01babf4b8b698fe57b6ecc41933a7ff2e0b8d7a221459412b" "/opt/rustwide/cargo-home/bin/cargo" "+8262275854dc0e5381c9d42d56257d94932c5a87" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] 7b2c6738b40163113a710e04a47f07b2fd230c8c7349b096f0b66f9b23df380e
[INFO] running `Command { std: "docker" "start" "-a" "7b2c6738b40163113a710e04a47f07b2fd230c8c7349b096f0b66f9b23df380e", 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] 
[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] 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 0.07s
[INFO] [stderr]      Running unittests (/opt/rustwide/target/debug/deps/adaptive_backoff-925f66600952feab)
[INFO] [stdout] 
[INFO] [stderr]    Doc-tests adaptive_backoff
[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 0.00s
[INFO] [stdout] 
[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" "7b2c6738b40163113a710e04a47f07b2fd230c8c7349b096f0b66f9b23df380e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "7b2c6738b40163113a710e04a47f07b2fd230c8c7349b096f0b66f9b23df380e", kill_on_drop: false }`
[INFO] [stdout] 7b2c6738b40163113a710e04a47f07b2fd230c8c7349b096f0b66f9b23df380e