[INFO] fetching crate slices 0.2.0...
[INFO] testing slices-0.2.0 against 1.55.0 for beta-1.56-1
[INFO] extracting crate slices 0.2.0 into /workspace/builds/worker-106/source
[INFO] validating manifest of crates.io crate slices 0.2.0 on toolchain 1.55.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.55.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate slices 0.2.0
[INFO] finished tweaking crates.io crate slices 0.2.0
[INFO] tweaked toml for crates.io crate slices 0.2.0 written to /workspace/builds/worker-106/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.55.0" "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" "+1.55.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded faster-hex v0.6.1
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-106/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-106/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:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+1.55.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 4331463d2f7412c70e30a651a16f84627b13fa78d3d4ce14822a718882429143
[INFO] running `Command { std: "docker" "start" "-a" "4331463d2f7412c70e30a651a16f84627b13fa78d3d4ce14822a718882429143", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "4331463d2f7412c70e30a651a16f84627b13fa78d3d4ce14822a718882429143", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "4331463d2f7412c70e30a651a16f84627b13fa78d3d4ce14822a718882429143", kill_on_drop: false }`
[INFO] [stdout] 4331463d2f7412c70e30a651a16f84627b13fa78d3d4ce14822a718882429143
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-106/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-106/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:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+1.55.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 3d6c150bc4e58c564de1f8ae52a6ba6a4fb37ba97ea1754ff3f9227cb2dd13e4
[INFO] running `Command { std: "docker" "start" "-a" "3d6c150bc4e58c564de1f8ae52a6ba6a4fb37ba97ea1754ff3f9227cb2dd13e4", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.29
[INFO] [stderr]    Compiling unicode-xid v0.2.2
[INFO] [stderr]    Compiling syn v1.0.76
[INFO] [stderr]    Compiling faster-hex v0.6.1
[INFO] [stderr]    Compiling quote v1.0.9
[INFO] [stderr]    Compiling slices v0.2.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 18.30s
[INFO] running `Command { std: "docker" "inspect" "3d6c150bc4e58c564de1f8ae52a6ba6a4fb37ba97ea1754ff3f9227cb2dd13e4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "3d6c150bc4e58c564de1f8ae52a6ba6a4fb37ba97ea1754ff3f9227cb2dd13e4", kill_on_drop: false }`
[INFO] [stdout] 3d6c150bc4e58c564de1f8ae52a6ba6a4fb37ba97ea1754ff3f9227cb2dd13e4
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-106/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-106/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:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+1.55.0" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 3e42870353c349b4f4b987bee289f4a99dd71c66e25821708edf31874de26baa
[INFO] running `Command { std: "docker" "start" "-a" "3e42870353c349b4f4b987bee289f4a99dd71c66e25821708edf31874de26baa", kill_on_drop: false }`
[INFO] [stderr]    Compiling slices v0.2.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.42s
[INFO] running `Command { std: "docker" "inspect" "3e42870353c349b4f4b987bee289f4a99dd71c66e25821708edf31874de26baa", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "3e42870353c349b4f4b987bee289f4a99dd71c66e25821708edf31874de26baa", kill_on_drop: false }`
[INFO] [stdout] 3e42870353c349b4f4b987bee289f4a99dd71c66e25821708edf31874de26baa
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-106/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-106/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:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+1.55.0" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] c7e8cfc8ebe56f53c51ad8c438ec5d06b4b386f3c08262cda9fef0970a3ecdae
[INFO] running `Command { std: "docker" "start" "-a" "c7e8cfc8ebe56f53c51ad8c438ec5d06b4b386f3c08262cda9fef0970a3ecdae", kill_on_drop: false }`
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.02s
[INFO] [stderr]      Running unittests (/opt/rustwide/target/debug/deps/slices-ce9866f1013ee60d)
[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 slices
[INFO] [stdout] 
[INFO] [stdout] running 1 test
[INFO] [stdout] test src/lib.rs - (line 20) ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 1 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.34s
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "c7e8cfc8ebe56f53c51ad8c438ec5d06b4b386f3c08262cda9fef0970a3ecdae", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c7e8cfc8ebe56f53c51ad8c438ec5d06b4b386f3c08262cda9fef0970a3ecdae", kill_on_drop: false }`
[INFO] [stdout] c7e8cfc8ebe56f53c51ad8c438ec5d06b4b386f3c08262cda9fef0970a3ecdae