[INFO] fetching crate slices 0.2.0...
[INFO] testing slices-0.2.0 against beta-2021-09-08 for beta-1.56-1
[INFO] extracting crate slices 0.2.0 into /workspace/builds/worker-87/source
[INFO] validating manifest of crates.io crate slices 0.2.0 on toolchain beta-2021-09-08
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2021-09-08" "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-87/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2021-09-08" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2021-09-08" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-87/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-87/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" "+beta-2021-09-08" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 4ccb9ceb6e5ff098a6c94d22639b4e729155dc37d578dfc941a85bfe3a77f5b1
[INFO] running `Command { std: "docker" "start" "-a" "4ccb9ceb6e5ff098a6c94d22639b4e729155dc37d578dfc941a85bfe3a77f5b1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "4ccb9ceb6e5ff098a6c94d22639b4e729155dc37d578dfc941a85bfe3a77f5b1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "4ccb9ceb6e5ff098a6c94d22639b4e729155dc37d578dfc941a85bfe3a77f5b1", kill_on_drop: false }`
[INFO] [stdout] 4ccb9ceb6e5ff098a6c94d22639b4e729155dc37d578dfc941a85bfe3a77f5b1
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-87/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-87/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" "+beta-2021-09-08" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 7dc9124a53c7d7b053bbd3600be11c1c4b5eb6e686471e31d7b170e9fcf32c00
[INFO] running `Command { std: "docker" "start" "-a" "7dc9124a53c7d7b053bbd3600be11c1c4b5eb6e686471e31d7b170e9fcf32c00", 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 18.28s
[INFO] running `Command { std: "docker" "inspect" "7dc9124a53c7d7b053bbd3600be11c1c4b5eb6e686471e31d7b170e9fcf32c00", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "7dc9124a53c7d7b053bbd3600be11c1c4b5eb6e686471e31d7b170e9fcf32c00", kill_on_drop: false }`
[INFO] [stdout] 7dc9124a53c7d7b053bbd3600be11c1c4b5eb6e686471e31d7b170e9fcf32c00
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-87/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-87/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" "+beta-2021-09-08" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] ddaee54fd550d98c9cedf50b5e0e42e162e745a071080f7a335127bbead38ee8
[INFO] running `Command { std: "docker" "start" "-a" "ddaee54fd550d98c9cedf50b5e0e42e162e745a071080f7a335127bbead38ee8", 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" "ddaee54fd550d98c9cedf50b5e0e42e162e745a071080f7a335127bbead38ee8", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ddaee54fd550d98c9cedf50b5e0e42e162e745a071080f7a335127bbead38ee8", kill_on_drop: false }`
[INFO] [stdout] ddaee54fd550d98c9cedf50b5e0e42e162e745a071080f7a335127bbead38ee8
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-87/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-87/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" "+beta-2021-09-08" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] 37ff0e7d29c4a8dbce0a080b933cb03094b489bcb504a1ef84a2ce9e80c54da8
[INFO] running `Command { std: "docker" "start" "-a" "37ff0e7d29c4a8dbce0a080b933cb03094b489bcb504a1ef84a2ce9e80c54da8", kill_on_drop: false }`
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.05s
[INFO] [stderr]      Running unittests (/opt/rustwide/target/debug/deps/slices-938d28eeb0146e8e)
[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 0.31s
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "37ff0e7d29c4a8dbce0a080b933cb03094b489bcb504a1ef84a2ce9e80c54da8", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "37ff0e7d29c4a8dbce0a080b933cb03094b489bcb504a1ef84a2ce9e80c54da8", kill_on_drop: false }`
[INFO] [stdout] 37ff0e7d29c4a8dbce0a080b933cb03094b489bcb504a1ef84a2ce9e80c54da8