[INFO] fetching crate ukebox 0.9.0...
[INFO] testing ukebox-0.9.0 against 1.59.0 for beta-1.60-1
[INFO] extracting crate ukebox 0.9.0 into /workspace/builds/worker-57/source
[INFO] validating manifest of crates.io crate ukebox 0.9.0 on toolchain 1.59.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.59.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate ukebox 0.9.0
[INFO] finished tweaking crates.io crate ukebox 0.9.0
[INFO] tweaked toml for crates.io crate ukebox 0.9.0 written to /workspace/builds/worker-57/source/Cargo.toml
[INFO] crate crates.io crate ukebox 0.9.0 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.59.0" "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-57/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-57/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@sha256:0cd99ca24d8e8c98e67c542213511d985b8778b5bdcbb160e038429496686047" "/opt/rustwide/cargo-home/bin/cargo" "+1.59.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 98743e38ed0ce05fa59970264ce0c1bb6a664604caf467aec35549333cfd5592
[INFO] running `Command { std: "docker" "start" "-a" "98743e38ed0ce05fa59970264ce0c1bb6a664604caf467aec35549333cfd5592", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "98743e38ed0ce05fa59970264ce0c1bb6a664604caf467aec35549333cfd5592", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "98743e38ed0ce05fa59970264ce0c1bb6a664604caf467aec35549333cfd5592", kill_on_drop: false }`
[INFO] [stdout] 98743e38ed0ce05fa59970264ce0c1bb6a664604caf467aec35549333cfd5592
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-57/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-57/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@sha256:0cd99ca24d8e8c98e67c542213511d985b8778b5bdcbb160e038429496686047" "/opt/rustwide/cargo-home/bin/cargo" "+1.59.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 2f10b8565fd873cbd8865b5b8dd5c46fb4197bc0aa510f41fbd76aac2736e063
[INFO] running `Command { std: "docker" "start" "-a" "2f10b8565fd873cbd8865b5b8dd5c46fb4197bc0aa510f41fbd76aac2736e063", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling proc-macro2 v1.0.32
[INFO] [stderr]    Compiling syn v1.0.82
[INFO] [stderr]    Compiling libc v0.2.109
[INFO] [stderr]    Compiling unicode-width v0.1.9
[INFO] [stderr]    Compiling unicode-segmentation v1.8.0
[INFO] [stderr]    Compiling fixedbitset v0.4.0
[INFO] [stderr]    Compiling proc-macro-error-attr v1.0.4
[INFO] [stderr]    Compiling proc-macro-error v1.0.4
[INFO] [stderr]    Compiling indexmap v1.7.0
[INFO] [stderr]    Compiling itertools v0.10.1
[INFO] [stderr]    Compiling textwrap v0.11.0
[INFO] [stderr]    Compiling heck v0.3.3
[INFO] [stderr]    Compiling quote v1.0.10
[INFO] [stderr]    Compiling petgraph v0.6.0
[INFO] [stderr]    Compiling atty v0.2.14
[INFO] [stderr]    Compiling clap v2.34.0
[INFO] [stderr]    Compiling structopt-derive v0.4.18
[INFO] [stderr]    Compiling structopt v0.3.25
[INFO] [stderr]    Compiling ukebox v0.9.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 17.36s
[INFO] running `Command { std: "docker" "inspect" "2f10b8565fd873cbd8865b5b8dd5c46fb4197bc0aa510f41fbd76aac2736e063", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "2f10b8565fd873cbd8865b5b8dd5c46fb4197bc0aa510f41fbd76aac2736e063", kill_on_drop: false }`
[INFO] [stdout] 2f10b8565fd873cbd8865b5b8dd5c46fb4197bc0aa510f41fbd76aac2736e063
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-57/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-57/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@sha256:0cd99ca24d8e8c98e67c542213511d985b8778b5bdcbb160e038429496686047" "/opt/rustwide/cargo-home/bin/cargo" "+1.59.0" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 88e7c1c3fc91f28861612c8eff39b40845fac857ad4173fa4eff1c0dbb466447
[INFO] running `Command { std: "docker" "start" "-a" "88e7c1c3fc91f28861612c8eff39b40845fac857ad4173fa4eff1c0dbb466447", kill_on_drop: false }`
[INFO] [stderr]    Compiling semver v1.0.4
[INFO] [stderr]    Compiling doc-comment v0.3.3
[INFO] [stderr]    Compiling predicates-core v1.0.2
[INFO] [stderr]    Compiling normalize-line-endings v0.3.0
[INFO] [stderr]    Compiling termtree v0.2.3
[INFO] [stderr]    Compiling difflib v0.4.0
[INFO] [stderr]    Compiling regex-automata v0.1.10
[INFO] [stderr]    Compiling num-traits v0.2.14
[INFO] [stderr]    Compiling wait-timeout v0.2.0
[INFO] [stderr]    Compiling bstr v0.2.17
[INFO] [stderr]    Compiling predicates-tree v1.0.4
[INFO] [stderr]    Compiling rustc_version v0.4.0
[INFO] [stderr]    Compiling rstest v0.11.0
[INFO] [stderr]    Compiling float-cmp v0.9.0
[INFO] [stderr]    Compiling predicates v2.1.0
[INFO] [stderr]    Compiling assert_cmd v2.0.2
[INFO] [stderr]    Compiling ukebox v0.9.0 (/opt/rustwide/workdir)
[INFO] [stderr] error: could not compile `ukebox`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustc --crate-name ukebox --edition=2018 src/lib.rs --error-format=json --json=diagnostic-rendered-ansi,future-incompat --emit=dep-info,link -C embed-bitcode=no -C debuginfo=2 --test -C metadata=d4444db33e407838 -C extra-filename=-d4444db33e407838 --out-dir /opt/rustwide/target/debug/deps -L dependency=/opt/rustwide/target/debug/deps --extern assert_cmd=/opt/rustwide/target/debug/deps/libassert_cmd-5c58d541bc675b3a.rlib --extern indoc=/opt/rustwide/target/debug/deps/libindoc-f052025d6440b426.so --extern itertools=/opt/rustwide/target/debug/deps/libitertools-d013b5c31c8aac7a.rlib --extern lazy_static=/opt/rustwide/target/debug/deps/liblazy_static-02ff0d0fbc57b9b4.rlib --extern petgraph=/opt/rustwide/target/debug/deps/libpetgraph-0b4ec5b773aa540a.rlib --extern predicates=/opt/rustwide/target/debug/deps/libpredicates-5c8f40053b2516aa.rlib --extern rstest=/opt/rustwide/target/debug/deps/librstest-a25e63c34af651b0.so --extern structopt=/opt/rustwide/target/debug/deps/libstructopt-af7933367976b75e.rlib --cap-lints=warn` (signal: 9, SIGKILL: kill)
[INFO] running `Command { std: "docker" "inspect" "88e7c1c3fc91f28861612c8eff39b40845fac857ad4173fa4eff1c0dbb466447", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "88e7c1c3fc91f28861612c8eff39b40845fac857ad4173fa4eff1c0dbb466447", kill_on_drop: false }`
[INFO] [stdout] 88e7c1c3fc91f28861612c8eff39b40845fac857ad4173fa4eff1c0dbb466447