[INFO] cloning repository https://github.com/tbro/rusty-recommends
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/tbro/rusty-recommends" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ftbro%2Frusty-recommends", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ftbro%2Frusty-recommends'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 1f5de6d8076baa49fec3409a4c537090205fa948
[INFO] building tbro/rusty-recommends against master#c2804e6ec2c29a5c7368600ea173b890e2655c3d for pr-97334-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ftbro%2Frusty-recommends" "/workspace/builds/worker-6/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-6/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/tbro/rusty-recommends on toolchain c2804e6ec2c29a5c7368600ea173b890e2655c3d
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+c2804e6ec2c29a5c7368600ea173b890e2655c3d" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/tbro/rusty-recommends
[INFO] finished tweaking git repo https://github.com/tbro/rusty-recommends
[INFO] tweaked toml for git repo https://github.com/tbro/rusty-recommends written to /workspace/builds/worker-6/source/Cargo.toml
[INFO] crate git repo https://github.com/tbro/rusty-recommends already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+c2804e6ec2c29a5c7368600ea173b890e2655c3d" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr] warning: only one of `license` or `license-file` is necessary
[INFO] [stderr] `license` should be used if the package license can be expressed with a standard SPDX expression.
[INFO] [stderr] `license-file` should be used if the package uses a non-standard license.
[INFO] [stderr] See https://doc.rust-lang.org/cargo/reference/manifest.html#the-license-and-license-file-fields for more information.
[INFO] [stderr]     Updating git repository `https://github.com/clap-rs/clap/`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded webbrowser v0.5.2
[INFO] [stderr]   Downloaded random v0.12.2
[INFO] [stderr]   Downloaded tokio-socks v0.2.2
[INFO] [stderr]   Downloaded derive_builder v0.7.2
[INFO] [stderr]   Downloaded derive_builder_core v0.5.0
[INFO] [stderr]   Downloaded os_str_bytes v2.1.0
[INFO] [stderr]   Downloaded rspotify v0.9.0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/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@sha256:824c28ce115f6b999260af6986f3384c158e782489540e41c0b698ca1d9fd927" "/opt/rustwide/cargo-home/bin/cargo" "+c2804e6ec2c29a5c7368600ea173b890e2655c3d" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 3bf75a1d88f12e739fc38faa2610bd296897bfc6149c9a84163fe40b15bc4412
[INFO] running `Command { std: "docker" "start" "-a" "3bf75a1d88f12e739fc38faa2610bd296897bfc6149c9a84163fe40b15bc4412", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "3bf75a1d88f12e739fc38faa2610bd296897bfc6149c9a84163fe40b15bc4412", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "3bf75a1d88f12e739fc38faa2610bd296897bfc6149c9a84163fe40b15bc4412", kill_on_drop: false }`
[INFO] [stdout] 3bf75a1d88f12e739fc38faa2610bd296897bfc6149c9a84163fe40b15bc4412
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/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" "RUSTDOCFLAGS=--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@sha256:824c28ce115f6b999260af6986f3384c158e782489540e41c0b698ca1d9fd927" "/opt/rustwide/cargo-home/bin/cargo" "+c2804e6ec2c29a5c7368600ea173b890e2655c3d" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] cf933bb46ff6249a65438f9564d462ae84b031a522e06b4c9c7a1a490c83257b
[INFO] running `Command { std: "docker" "start" "-a" "cf933bb46ff6249a65438f9564d462ae84b031a522e06b4c9c7a1a490c83257b", kill_on_drop: false }`
[INFO] [stderr] warning: only one of `license` or `license-file` is necessary
[INFO] [stderr] `license` should be used if the package license can be expressed with a standard SPDX expression.
[INFO] [stderr] `license-file` should be used if the package uses a non-standard license.
[INFO] [stderr] See https://doc.rust-lang.org/cargo/reference/manifest.html#the-license-and-license-file-fields for more information.
[INFO] [stderr]    Compiling libc v0.2.69
[INFO] [stderr]    Compiling proc-macro2 v1.0.10
[INFO] [stderr]    Compiling unicode-xid v0.2.0
[INFO] [stderr]    Compiling syn v1.0.18
[INFO] [stderr]    Compiling autocfg v1.0.0
[INFO] [stderr]    Compiling cfg-if v0.1.10
[INFO] [stderr]    Compiling memchr v2.3.3
[INFO] [stderr]    Compiling cc v1.0.52
[INFO] [stderr]    Compiling version_check v0.9.1
[INFO] [stderr]    Compiling fnv v1.0.6
[INFO] [stderr]    Compiling lazy_static v1.4.0
[INFO] [stderr]    Compiling log v0.4.8
[INFO] [stderr]    Compiling slab v0.4.2
[INFO] [stderr]    Compiling futures-core v0.3.4
[INFO] [stderr]    Compiling proc-macro-nested v0.1.4
[INFO] [stderr]    Compiling futures-sink v0.3.4
[INFO] [stderr]    Compiling bytes v0.5.4
[INFO] [stderr]    Compiling pkg-config v0.3.17
[INFO] [stderr]    Compiling rand_core v0.4.2
[INFO] [stderr]    Compiling autocfg v0.1.7
[INFO] [stderr]    Compiling proc-macro-hack v0.5.15
[INFO] [stderr]    Compiling arc-swap v0.4.6
[INFO] [stderr]    Compiling proc-macro2 v0.4.30
[INFO] [stderr]    Compiling itoa v0.4.5
[INFO] [stderr]    Compiling bitflags v1.2.1
[INFO] [stderr]    Compiling futures-io v0.3.4
[INFO] [stderr]    Compiling pin-utils v0.1.0
[INFO] [stderr]    Compiling unicode-xid v0.1.0
[INFO] [stderr]    Compiling pin-project-lite v0.1.4
[INFO] [stderr]    Compiling futures-task v0.3.4
[INFO] [stderr]    Compiling syn v0.15.44
[INFO] [stderr]    Compiling smallvec v1.4.0
[INFO] [stderr]    Compiling matches v0.1.8
[INFO] [stderr]    Compiling byteorder v1.3.4
[INFO] [stderr]    Compiling openssl v0.10.29
[INFO] [stderr]    Compiling foreign-types-shared v0.1.1
[INFO] [stderr]    Compiling serde v1.0.106
[INFO] [stderr]    Compiling httparse v1.3.4
[INFO] [stderr]    Compiling native-tls v0.2.4
[INFO] [stderr]    Compiling strsim v0.7.0
[INFO] [stderr]    Compiling ident_case v1.0.1
[INFO] [stderr]    Compiling openssl-probe v0.1.2
[INFO] [stderr]    Compiling ryu v1.0.4
[INFO] [stderr]    Compiling failure_derive v0.1.7
[INFO] [stderr]    Compiling try-lock v0.2.2
[INFO] [stderr]    Compiling regex-syntax v0.6.17
[INFO] [stderr]    Compiling percent-encoding v2.1.0
[INFO] [stderr]    Compiling encoding_rs v0.8.22
[INFO] [stderr]    Compiling either v1.5.3
[INFO] [stderr]    Compiling rustc-demangle v0.1.16
[INFO] [stderr]    Compiling tower-service v0.3.0
[INFO] [stderr]    Compiling derive_builder v0.7.2
[INFO] [stderr]    Compiling quick-error v1.2.3
[INFO] [stderr]    Compiling dtoa v0.4.5
[INFO] [stderr]    Compiling unicode-segmentation v1.6.0
[INFO] [stderr]    Compiling termcolor v1.1.0
[INFO] [stderr]    Compiling mime v0.3.16
[INFO] [stderr]    Compiling rustc-serialize v0.3.24
[INFO] [stderr]    Compiling unicode-width v0.1.7
[INFO] [stderr]    Compiling base64 v0.11.0
[INFO] [stderr]    Compiling percent-encoding v1.0.1
[INFO] [stderr]    Compiling vec_map v0.8.1
[INFO] [stderr]    Compiling strsim v0.10.0
[INFO] [stderr]    Compiling random v0.12.2
[INFO] [stderr]    Compiling os_str_bytes v2.1.0
[INFO] [stderr]    Compiling webbrowser v0.5.2
[INFO] [stderr]    Compiling thread_local v1.0.1
[INFO] [stderr]    Compiling futures-channel v0.3.4
[INFO] [stderr]    Compiling rand_core v0.3.1
[INFO] [stderr]    Compiling rand_jitter v0.1.4
[INFO] [stderr]    Compiling http v0.2.1
[INFO] [stderr]    Compiling unicase v2.6.0
[INFO] [stderr]    Compiling proc-macro-error-attr v0.4.12
[INFO] [stderr]    Compiling proc-macro-error v0.4.12
[INFO] [stderr]    Compiling indexmap v1.3.2
[INFO] [stderr]    Compiling num-traits v0.2.11
[INFO] [stderr]    Compiling num-integer v0.1.42
[INFO] [stderr]    Compiling foreign-types v0.3.2
[INFO] [stderr]    Compiling unicode-normalization v0.1.12
[INFO] [stderr]    Compiling unicode-bidi v0.3.4
[INFO] [stderr]    Compiling rand_chacha v0.1.1
[INFO] [stderr]    Compiling rand_pcg v0.1.2
[INFO] [stderr]    Compiling rand v0.6.5
[INFO] [stderr]    Compiling itertools v0.8.2
[INFO] [stderr]    Compiling humantime v1.3.0
[INFO] [stderr]    Compiling textwrap v0.11.0
[INFO] [stderr]    Compiling heck v0.3.1
[INFO] [stderr]    Compiling rand_xorshift v0.1.1
[INFO] [stderr]    Compiling rand_isaac v0.1.1
[INFO] [stderr]    Compiling rand_hc v0.1.0
[INFO] [stderr]    Compiling openssl-sys v0.9.55
[INFO] [stderr]    Compiling backtrace-sys v0.1.36
[INFO] [stderr]    Compiling want v0.3.0
[INFO] [stderr]    Compiling idna v0.2.0
[INFO] [stderr]    Compiling idna v0.1.5
[INFO] [stderr]    Compiling quote v1.0.3
[INFO] [stderr]    Compiling iovec v0.1.4
[INFO] [stderr]    Compiling net2 v0.2.33
[INFO] [stderr]    Compiling signal-hook-registry v1.2.0
[INFO] [stderr]    Compiling num_cpus v1.13.0
[INFO] [stderr]    Compiling time v0.1.43
[INFO] [stderr]    Compiling atty v0.2.14
[INFO] [stderr]    Compiling rand_os v0.1.3
[INFO] [stderr]    Compiling quote v0.6.13
[INFO] [stderr]    Compiling aho-corasick v0.7.10
[INFO] [stderr]    Compiling base64 v0.10.1
[INFO] [stderr]    Compiling url v2.1.1
[INFO] [stderr]    Compiling mime_guess v2.0.3
[INFO] [stderr]    Compiling http-body v0.3.1
[INFO] [stderr]    Compiling bytes v0.4.12
[INFO] [stderr]    Compiling mio v0.6.21
[INFO] [stderr]    Compiling url v1.7.2
[INFO] [stderr]    Compiling regex v1.3.7
[INFO] [stderr]    Compiling mio-uds v0.6.7
[INFO] [stderr]    Compiling backtrace v0.3.46
[INFO] [stderr]    Compiling env_logger v0.6.2
[INFO] [stderr] error: could not compile `syn`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustc --crate-name syn --edition=2018 /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/syn-1.0.18/src/lib.rs --error-format=json --json=diagnostic-rendered-ansi,artifacts,future-incompat --crate-type lib --emit=dep-info,metadata,link -C embed-bitcode=no -C debuginfo=2 --cfg 'feature="clone-impls"' --cfg 'feature="default"' --cfg 'feature="derive"' --cfg 'feature="extra-traits"' --cfg 'feature="full"' --cfg 'feature="parsing"' --cfg 'feature="printing"' --cfg 'feature="proc-macro"' --cfg 'feature="quote"' --cfg 'feature="visit"' --cfg 'feature="visit-mut"' -C metadata=65cb76a70d25235f -C extra-filename=-65cb76a70d25235f --out-dir /opt/rustwide/target/debug/deps -L dependency=/opt/rustwide/target/debug/deps --extern proc_macro2=/opt/rustwide/target/debug/deps/libproc_macro2-9ccb718cd2a40d29.rmeta --extern quote=/opt/rustwide/target/debug/deps/libquote-3e4961dc624fceb6.rmeta --extern unicode_xid=/opt/rustwide/target/debug/deps/libunicode_xid-1256a373de2a2211.rmeta --cap-lints allow --cap-lints=forbid` (signal: 9, SIGKILL: kill)
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] running `Command { std: "docker" "inspect" "cf933bb46ff6249a65438f9564d462ae84b031a522e06b4c9c7a1a490c83257b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "cf933bb46ff6249a65438f9564d462ae84b031a522e06b4c9c7a1a490c83257b", kill_on_drop: false }`
[INFO] [stdout] cf933bb46ff6249a65438f9564d462ae84b031a522e06b4c9c7a1a490c83257b