[INFO] fetching crate ukebox 0.8.0...
[INFO] checking ukebox-0.8.0 against try#8552849d5ae3b6c66b89a0ac2e9c1e3ef5cde346 for pr-86194
[INFO] extracting crate ukebox 0.8.0 into /workspace/builds/worker-4/source
[INFO] validating manifest of crates.io crate ukebox 0.8.0 on toolchain 8552849d5ae3b6c66b89a0ac2e9c1e3ef5cde346
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+8552849d5ae3b6c66b89a0ac2e9c1e3ef5cde346" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate ukebox 0.8.0
[INFO] finished tweaking crates.io crate ukebox 0.8.0
[INFO] tweaked toml for crates.io crate ukebox 0.8.0 written to /workspace/builds/worker-4/source/Cargo.toml
[INFO] crate crates.io crate ukebox 0.8.0 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+8552849d5ae3b6c66b89a0ac2e9c1e3ef5cde346" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded indoc v1.0.3
[INFO] [stderr]   Downloaded assert_cmd v1.0.4
[INFO] [stderr]   Downloaded unindent v0.1.7
[INFO] [stderr]   Downloaded predicates v1.0.8
[INFO] [stderr]   Downloaded rstest v0.10.0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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@sha256:20528e8c29e4536546f0102ce88568b16ea7538393a33fcca951030f7af10457" "/opt/rustwide/cargo-home/bin/cargo" "+8552849d5ae3b6c66b89a0ac2e9c1e3ef5cde346" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 8c47b07e79a1e2543d312a3ec36c5232d0d1e827cec4b47f16789a98ade5a586
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "8c47b07e79a1e2543d312a3ec36c5232d0d1e827cec4b47f16789a98ade5a586", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "8c47b07e79a1e2543d312a3ec36c5232d0d1e827cec4b47f16789a98ade5a586", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "8c47b07e79a1e2543d312a3ec36c5232d0d1e827cec4b47f16789a98ade5a586", kill_on_drop: false }`
[INFO] [stdout] 8c47b07e79a1e2543d312a3ec36c5232d0d1e827cec4b47f16789a98ade5a586
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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=forbid" "-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@sha256:20528e8c29e4536546f0102ce88568b16ea7538393a33fcca951030f7af10457" "/opt/rustwide/cargo-home/bin/cargo" "+8552849d5ae3b6c66b89a0ac2e9c1e3ef5cde346" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] f795235e117c2340431074f6c4fcfff176c8ce8fbe9a1595d8b03a00e9072349
[INFO] running `Command { std: "docker" "start" "-a" "f795235e117c2340431074f6c4fcfff176c8ce8fbe9a1595d8b03a00e9072349", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.27
[INFO] [stderr]    Compiling syn v1.0.72
[INFO] [stderr]    Compiling ucd-trie v0.1.3
[INFO] [stderr]    Compiling memchr v2.4.0
[INFO] [stderr]     Checking either v1.6.1
[INFO] [stderr]     Checking byteorder v1.4.3
[INFO] [stderr]     Checking difference v2.0.0
[INFO] [stderr]     Checking treeline v0.1.0
[INFO] [stderr]     Checking normalize-line-endings v0.3.0
[INFO] [stderr]    Compiling unindent v0.1.7
[INFO] [stderr]    Compiling indexmap v1.6.2
[INFO] [stderr]     Checking wait-timeout v0.2.0
[INFO] [stderr]     Checking float-cmp v0.8.0
[INFO] [stderr]    Compiling pest v2.1.3
[INFO] [stderr]     Checking predicates-tree v1.0.2
[INFO] [stderr]     Checking itertools v0.10.0
[INFO] [stderr]    Compiling indoc v1.0.3
[INFO] [stderr]     Checking regex-automata v0.1.9
[INFO] [stderr]     Checking petgraph v0.5.1
[INFO] [stderr]    Compiling quote v1.0.9
[INFO] [stderr]     Checking aho-corasick v0.7.18
[INFO] [stderr]     Checking bstr v0.2.16
[INFO] [stderr]    Compiling semver-parser v0.10.2
[INFO] [stderr]    Compiling proc-macro-error-attr v1.0.4
[INFO] [stderr]    Compiling semver v0.11.0
[INFO] [stderr]    Compiling rustc_version v0.3.3
[INFO] [stderr]     Checking regex v1.5.4
[INFO] [stderr]    Compiling rstest v0.10.0
[INFO] [stderr]     Checking predicates v1.0.8
[INFO] [stderr]     Checking assert_cmd v1.0.4
[INFO] [stderr]    Compiling proc-macro-error v1.0.4
[INFO] [stderr]    Compiling structopt-derive v0.4.14
[INFO] [stderr]     Checking structopt v0.3.21
[INFO] [stderr]     Checking ukebox v0.8.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 47.80s
[INFO] running `Command { std: "docker" "inspect" "f795235e117c2340431074f6c4fcfff176c8ce8fbe9a1595d8b03a00e9072349", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f795235e117c2340431074f6c4fcfff176c8ce8fbe9a1595d8b03a00e9072349", kill_on_drop: false }`
[INFO] [stdout] f795235e117c2340431074f6c4fcfff176c8ce8fbe9a1595d8b03a00e9072349