[INFO] cloning repository https://github.com/PeterGrace/descaler
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/PeterGrace/descaler" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FPeterGrace%2Fdescaler", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FPeterGrace%2Fdescaler'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 82bab02f71f1fda43579998cd4e2b7bef3967260
[INFO] testing PeterGrace/descaler against beta-2021-08-01 for beta-1.55-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FPeterGrace%2Fdescaler" "/workspace/builds/worker-4/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-4/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/PeterGrace/descaler on toolchain beta-2021-08-01
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2021-08-01" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/PeterGrace/descaler
[INFO] finished tweaking git repo https://github.com/PeterGrace/descaler
[INFO] tweaked toml for git repo https://github.com/PeterGrace/descaler written to /workspace/builds/worker-4/source/Cargo.toml
[INFO] crate git repo https://github.com/PeterGrace/descaler already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2021-08-01" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded assert-json-diff v2.0.1
[INFO] [stderr]   Downloaded backoff v0.3.0
[INFO] [stderr]   Downloaded pin-project-lite v0.2.5
[INFO] [stderr]   Downloaded tokio v1.3.0
[INFO] [stderr]   Downloaded httpmock v0.5.6
[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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2021-08-01" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 916fa28b1259ce7b8c86c46941ebd72f1ca96276da740ba9e4d829b843b7d44f
[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" "916fa28b1259ce7b8c86c46941ebd72f1ca96276da740ba9e4d829b843b7d44f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "916fa28b1259ce7b8c86c46941ebd72f1ca96276da740ba9e4d829b843b7d44f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "916fa28b1259ce7b8c86c46941ebd72f1ca96276da740ba9e4d829b843b7d44f", kill_on_drop: false }`
[INFO] [stdout] 916fa28b1259ce7b8c86c46941ebd72f1ca96276da740ba9e4d829b843b7d44f
[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=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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2021-08-01" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 684e6a841f39591b12f73fa1f8962d9475b0594548e676569c06254c9dd866a2
[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" "684e6a841f39591b12f73fa1f8962d9475b0594548e676569c06254c9dd866a2", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.87
[INFO] [stderr]    Compiling serde_json v1.0.64
[INFO] [stderr]    Compiling openssl v0.10.32
[INFO] [stderr]    Compiling k8s-openapi v0.11.0
[INFO] [stderr]    Compiling array_tool v1.0.3
[INFO] [stderr]    Compiling schemars v0.8.0
[INFO] [stderr]    Compiling protobuf v2.22.0
[INFO] [stderr]    Compiling prometheus v0.9.0
[INFO] [stderr]    Compiling yaml-rust v0.3.5
[INFO] [stderr]    Compiling auditable v0.1.0
[INFO] [stderr]    Compiling indexmap v1.6.1
[INFO] [stderr]    Compiling tokio v1.3.0
[INFO] [stderr]    Compiling futures-channel v0.3.13
[INFO] [stderr]    Compiling openssl-sys v0.9.60
[INFO] [stderr]    Compiling idna v0.2.2
[INFO] [stderr]    Compiling idna v0.1.5
[INFO] [stderr]    Compiling syn v0.13.11
[INFO] [stderr]    Compiling ordered-float v2.1.1
[INFO] [stderr]    Compiling ctor v0.1.19
[INFO] [stderr]    Compiling serde_derive v1.0.123
[INFO] [stderr]    Compiling futures-macro v0.3.13
[INFO] [stderr]    Compiling darling_core v0.12.2
[INFO] [stderr]    Compiling thiserror-impl v1.0.24
[INFO] [stderr]    Compiling pin-project-internal v0.4.27
[INFO] [stderr]    Compiling serde_derive_internals v0.25.0
[INFO] [stderr]    Compiling snafu-derive v0.6.10
[INFO] [stderr]    Compiling derivative v2.2.0
[INFO] [stderr]    Compiling strum_macros v0.20.1
[INFO] [stderr]    Compiling Inflector v0.11.4
[INFO] [stderr]    Compiling pem v0.8.3
[INFO] [stderr]    Compiling url v1.7.2
[INFO] [stderr]    Compiling url v2.2.1
[INFO] [stderr]    Compiling native-tls v0.2.7
[INFO] [stderr]    Compiling value-bag v1.0.0-alpha.6
[INFO] [stderr]    Compiling parking_lot_core v0.8.3
[INFO] [stderr]    Compiling num_cpus v1.13.0
[INFO] [stderr]    Compiling signal-hook-registry v1.3.0
[INFO] [stderr]    Compiling socket2 v0.3.19
[INFO] [stderr]    Compiling iovec v0.1.4
[INFO] [stderr]    Compiling net2 v0.2.37
[INFO] [stderr]    Compiling atty v0.2.14
[INFO] [stderr]    Compiling time v0.1.44
[INFO] [stderr]    Compiling dirs-sys-next v0.1.2
[INFO] [stderr]    Compiling getrandom v0.2.2
[INFO] [stderr]    Compiling futures-util v0.3.13
[INFO] [stderr]    Compiling log v0.4.14
[INFO] [stderr]    Compiling schemars_derive v0.8.0
[INFO] [stderr]    Compiling dashmap v4.0.2
[INFO] [stderr]    Compiling parking_lot v0.11.1
[INFO] [stderr]    Compiling thiserror v1.0.24
[INFO] [stderr]    Compiling clap v2.33.3
[INFO] [stderr]    Compiling dirs-next v2.0.0
[INFO] [stderr]    Compiling rand_core v0.6.2
[INFO] [stderr]    Compiling mio v0.7.9
[INFO] [stderr]    Compiling tracing v0.1.25
[INFO] [stderr]    Compiling want v0.3.0
[INFO] [stderr]    Compiling mio v0.6.23
[INFO] [stderr]    Compiling env_logger v0.7.1
[INFO] [stderr]    Compiling env_logger v0.8.3
[INFO] [stderr]    Compiling pin-project v0.4.27
[INFO] [stderr]    Compiling rand_chacha v0.3.0
[INFO] [stderr]    Compiling tracing-futures v0.2.5
[INFO] [stderr]    Compiling snafu v0.6.10
[INFO] [stderr] error: could not compile `syn`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustc --crate-name syn /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/syn-0.13.11/src/lib.rs --error-format=json --json=diagnostic-rendered-ansi --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"' -C metadata=2b060deb6cf4aeec -C extra-filename=-2b060deb6cf4aeec --out-dir /opt/rustwide/target/debug/deps -L dependency=/opt/rustwide/target/debug/deps --extern proc_macro2=/opt/rustwide/target/debug/deps/libproc_macro2-e585f1890383ec80.rmeta --extern quote=/opt/rustwide/target/debug/deps/libquote-cdb06053222a901c.rmeta --extern unicode_xid=/opt/rustwide/target/debug/deps/libunicode_xid-17566c89b81f032a.rmeta --cap-lints allow --cap-lints=warn` (signal: 9, SIGKILL: kill)
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: build failed
[INFO] running `Command { std: "docker" "inspect" "684e6a841f39591b12f73fa1f8962d9475b0594548e676569c06254c9dd866a2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "684e6a841f39591b12f73fa1f8962d9475b0594548e676569c06254c9dd866a2", kill_on_drop: false }`
[INFO] [stdout] 684e6a841f39591b12f73fa1f8962d9475b0594548e676569c06254c9dd866a2
