[INFO] fetching crate sleuth 0.2.1...
[INFO] testing sleuth-0.2.1 against beta-2026-04-21 for beta-1.96-2
[INFO] extracting crate sleuth 0.2.1 into /workspace/builds/worker-3-tc2/source
[INFO] started tweaking crates.io crate sleuth 0.2.1
[INFO] finished tweaking crates.io crate sleuth 0.2.1
[INFO] tweaked toml for crates.io crate sleuth 0.2.1 written to /workspace/builds/worker-3-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate sleuth 0.2.1 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 10 packages to latest compatible versions
[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-3-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-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] 9ef774c00fb10437510cff21cc10e0f367ae15fedf01a637dd1357b287e1f2cb
[INFO] running `Command { std: "docker" "start" "-a" "9ef774c00fb10437510cff21cc10e0f367ae15fedf01a637dd1357b287e1f2cb", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "9ef774c00fb10437510cff21cc10e0f367ae15fedf01a637dd1357b287e1f2cb", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "9ef774c00fb10437510cff21cc10e0f367ae15fedf01a637dd1357b287e1f2cb", kill_on_drop: false }`
[INFO] [stdout] 9ef774c00fb10437510cff21cc10e0f367ae15fedf01a637dd1357b287e1f2cb
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-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] 29b9c1a3074749aa815ed062209333b6a5202b68c2db925c974a4c8a8a395b90
[INFO] running `Command { std: "docker" "start" "-a" "29b9c1a3074749aa815ed062209333b6a5202b68c2db925c974a4c8a8a395b90", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.106
[INFO] [stderr]    Compiling quote v1.0.45
[INFO] [stderr]    Compiling colored v3.1.1
[INFO] [stderr]    Compiling prettyplease v0.2.37
[INFO] [stderr]    Compiling syn v2.0.117
[INFO] [stderr]    Compiling sleuth-mutator v0.2.1
[INFO] [stderr]    Compiling sleuth v0.2.1 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused imports: `timid_assert_false` and `timid_assert`
[INFO] [stdout]   --> src/util.rs:44:10
[INFO] [stdout]    |
[INFO] [stdout] 44 | pub use {timid_assert, timid_assert_false};
[INFO] [stdout]    |          ^^^^^^^^^^^^  ^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout] note: the lint level is defined here
[INFO] [stdout]   --> src/lib.rs:57:9
[INFO] [stdout]    |
[INFO] [stdout] 57 | #![deny(warnings)]
[INFO] [stdout]    |         ^^^^^^^^
[INFO] [stdout]    = note: `#[warn(unused_imports)]` implied by `#[warn(warnings)]`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 17.09s
[INFO] running `Command { std: "docker" "inspect" "29b9c1a3074749aa815ed062209333b6a5202b68c2db925c974a4c8a8a395b90", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "29b9c1a3074749aa815ed062209333b6a5202b68c2db925c974a4c8a8a395b90", kill_on_drop: false }`
[INFO] [stdout] 29b9c1a3074749aa815ed062209333b6a5202b68c2db925c974a4c8a8a395b90
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-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] 468ca893366f3d173eab5c33e25bd69cf96d3db71d03a11321eaa7986db8a0c0
[INFO] running `Command { std: "docker" "start" "-a" "468ca893366f3d173eab5c33e25bd69cf96d3db71d03a11321eaa7986db8a0c0", kill_on_drop: false }`
[INFO] [stdout] warning: unused imports: `timid_assert_false` and `timid_assert`
[INFO] [stdout]   --> src/util.rs:44:10
[INFO] [stdout]    |
[INFO] [stdout] 44 | pub use {timid_assert, timid_assert_false};
[INFO] [stdout]    |          ^^^^^^^^^^^^  ^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout] note: the lint level is defined here
[INFO] [stdout]   --> src/lib.rs:57:9
[INFO] [stdout]    |
[INFO] [stdout] 57 | #![deny(warnings)]
[INFO] [stdout]    |         ^^^^^^^^
[INFO] [stdout]    = note: `#[warn(unused_imports)]` implied by `#[warn(warnings)]`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]    Compiling sleuth v0.2.1 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused imports: `timid_assert_false` and `timid_assert`
[INFO] [stdout]   --> src/util.rs:44:10
[INFO] [stdout]    |
[INFO] [stdout] 44 | pub use {timid_assert, timid_assert_false};
[INFO] [stdout]    |          ^^^^^^^^^^^^  ^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout] note: the lint level is defined here
[INFO] [stdout]   --> src/lib.rs:57:9
[INFO] [stdout]    |
[INFO] [stdout] 57 | #![deny(warnings)]
[INFO] [stdout]    |         ^^^^^^^^
[INFO] [stdout]    = note: `#[warn(unused_imports)]` implied by `#[warn(warnings)]`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.79s
[INFO] running `Command { std: "docker" "inspect" "468ca893366f3d173eab5c33e25bd69cf96d3db71d03a11321eaa7986db8a0c0", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "468ca893366f3d173eab5c33e25bd69cf96d3db71d03a11321eaa7986db8a0c0", kill_on_drop: false }`
[INFO] [stdout] 468ca893366f3d173eab5c33e25bd69cf96d3db71d03a11321eaa7986db8a0c0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-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] 4b8e7c7a14337945978957801bbf2af87d3ce3ff83591ed90c3645544831354d
[INFO] running `Command { std: "docker" "start" "-a" "4b8e7c7a14337945978957801bbf2af87d3ce3ff83591ed90c3645544831354d", kill_on_drop: false }`
[INFO] [stderr] warning: unused imports: `timid_assert_false` and `timid_assert`
[INFO] [stderr]   --> src/util.rs:44:10
[INFO] [stderr]    |
[INFO] [stderr] 44 | pub use {timid_assert, timid_assert_false};
[INFO] [stderr]    |          ^^^^^^^^^^^^  ^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr] note: the lint level is defined here
[INFO] [stderr]   --> src/lib.rs:57:9
[INFO] [stderr]    |
[INFO] [stderr] 57 | #![deny(warnings)]
[INFO] [stderr]    |         ^^^^^^^^
[INFO] [stderr]    = note: `#[warn(unused_imports)]` implied by `#[warn(warnings)]`
[INFO] [stderr] 
[INFO] [stderr] warning: `sleuth` (lib) generated 1 warning (run `cargo fix --lib -p sleuth` to apply 1 suggestion)
[INFO] [stderr] warning: `sleuth` (lib test) generated 1 warning (1 duplicate)
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.04s
[INFO] [stderr]      Running unittests src/lib.rs (/opt/rustwide/target/debug/deps/sleuth-64f3e3d1b577eca8)
[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] [stderr]    Doc-tests sleuth
[INFO] [stdout] 
[INFO] [stdout] running 1 test
[INFO] [stdout] test src/lib.rs - (line 2) ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 1 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.21s
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "4b8e7c7a14337945978957801bbf2af87d3ce3ff83591ed90c3645544831354d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "4b8e7c7a14337945978957801bbf2af87d3ce3ff83591ed90c3645544831354d", kill_on_drop: false }`
[INFO] [stdout] 4b8e7c7a14337945978957801bbf2af87d3ce3ff83591ed90c3645544831354d
