[INFO] fetching crate kepler_backoff 0.1.0...
[INFO] testing kepler_backoff-0.1.0 against beta-2026-04-21 for beta-1.96-3
[INFO] extracting crate kepler_backoff 0.1.0 into /workspace/builds/worker-7-tc2/source
[INFO] started tweaking crates.io crate kepler_backoff 0.1.0
[INFO] finished tweaking crates.io crate kepler_backoff 0.1.0
[INFO] tweaked toml for crates.io crate kepler_backoff 0.1.0 written to /workspace/builds/worker-7-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate kepler_backoff 0.1.0 on toolchain beta-2026-04-21
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+beta-2026-04-21" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+beta-2026-04-21" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]      Locking 14 packages to latest compatible versions
[INFO] [stderr]       Adding rand v0.8.6 (available: v0.10.1)
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+beta-2026-04-21" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2026-04-21" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] ce6518fe0be368322ac2f705c8cecb89086100c8a87e830316deaf52b9c64b1a
[INFO] running `Command { std: "docker" "start" "-a" "ce6518fe0be368322ac2f705c8cecb89086100c8a87e830316deaf52b9c64b1a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "ce6518fe0be368322ac2f705c8cecb89086100c8a87e830316deaf52b9c64b1a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ce6518fe0be368322ac2f705c8cecb89086100c8a87e830316deaf52b9c64b1a", kill_on_drop: false }`
[INFO] [stdout] ce6518fe0be368322ac2f705c8cecb89086100c8a87e830316deaf52b9c64b1a
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-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=warn" "-e" "RUSTDOCFLAGS=--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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2026-04-21" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] e4dcff7800bbce13b25d7b6641c725f1c7b099a8241c4bd9500a69091c3a82ce
[INFO] running `Command { std: "docker" "start" "-a" "e4dcff7800bbce13b25d7b6641c725f1c7b099a8241c4bd9500a69091c3a82ce", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.186
[INFO] [stderr]    Compiling zerocopy v0.8.48
[INFO] [stderr]    Compiling getrandom v0.2.17
[INFO] [stderr]    Compiling rand_core v0.6.4
[INFO] [stderr]    Compiling ppv-lite86 v0.2.21
[INFO] [stderr]    Compiling rand_chacha v0.3.1
[INFO] [stderr]    Compiling rand v0.8.6
[INFO] [stderr]    Compiling kepler_backoff v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 7.99s
[INFO] running `Command { std: "docker" "inspect" "e4dcff7800bbce13b25d7b6641c725f1c7b099a8241c4bd9500a69091c3a82ce", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e4dcff7800bbce13b25d7b6641c725f1c7b099a8241c4bd9500a69091c3a82ce", kill_on_drop: false }`
[INFO] [stdout] e4dcff7800bbce13b25d7b6641c725f1c7b099a8241c4bd9500a69091c3a82ce
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-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=warn" "-e" "RUSTDOCFLAGS=--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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2026-04-21" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] fb8c9788711010522095c75ae90f816989e63855f2af04eecba4a809e9a1c8cd
[INFO] running `Command { std: "docker" "start" "-a" "fb8c9788711010522095c75ae90f816989e63855f2af04eecba4a809e9a1c8cd", kill_on_drop: false }`
[INFO] [stderr]    Compiling kepler_backoff v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.51s
[INFO] running `Command { std: "docker" "inspect" "fb8c9788711010522095c75ae90f816989e63855f2af04eecba4a809e9a1c8cd", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "fb8c9788711010522095c75ae90f816989e63855f2af04eecba4a809e9a1c8cd", kill_on_drop: false }`
[INFO] [stdout] fb8c9788711010522095c75ae90f816989e63855f2af04eecba4a809e9a1c8cd
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-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=warn" "-e" "RUSTDOCFLAGS=--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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2026-04-21" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] e13658f5c36aab5592d624224a925922df53272af487fc5248c7e7067df7a6a3
[INFO] running `Command { std: "docker" "start" "-a" "e13658f5c36aab5592d624224a925922df53272af487fc5248c7e7067df7a6a3", kill_on_drop: false }`
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.04s
[INFO] [stderr]      Running unittests src/lib.rs (/opt/rustwide/target/debug/deps/kepler_backoff-036755391d0ae472)
[INFO] [stdout] 
[INFO] [stdout] running 4 tests
[INFO] [stdout] test backoff_tests::backoff_duration_increases_with_attempt_count ... ok
[INFO] [stdout] test backoff_tests::backoff_reset_can_be_reseted ... ok
[INFO] [stdout] test backoff_tests::backoff_duration_is_capped_at_max_duration ... ok
[INFO] [stderr]    Doc-tests kepler_backoff
[INFO] [stdout] test backoff_tests::backoff_duration_can_be_jittered ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 4 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.02s
[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" "e13658f5c36aab5592d624224a925922df53272af487fc5248c7e7067df7a6a3", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e13658f5c36aab5592d624224a925922df53272af487fc5248c7e7067df7a6a3", kill_on_drop: false }`
[INFO] [stdout] e13658f5c36aab5592d624224a925922df53272af487fc5248c7e7067df7a6a3