[INFO] cloning repository https://github.com/gdunton/rust-gb
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/gdunton/rust-gb" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fgdunton%2Frust-gb", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fgdunton%2Frust-gb'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 4b4d8075bf76165971c09631aa0f0a861eab46b0
[INFO] testing gdunton/rust-gb against 1.55.0 for beta-1.56-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fgdunton%2Frust-gb" "/workspace/builds/worker-3/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-3/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/gdunton/rust-gb on toolchain 1.55.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.55.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/gdunton/rust-gb
[INFO] finished tweaking git repo https://github.com/gdunton/rust-gb
[INFO] tweaked toml for git repo https://github.com/gdunton/rust-gb written to /workspace/builds/worker-3/source/Cargo.toml
[INFO] crate git repo https://github.com/gdunton/rust-gb already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.55.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/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" "+1.55.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 0f1cc2af53957cf36358e4208d475302284818ed6369673644b895157510391e
[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" "0f1cc2af53957cf36358e4208d475302284818ed6369673644b895157510391e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "0f1cc2af53957cf36358e4208d475302284818ed6369673644b895157510391e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "0f1cc2af53957cf36358e4208d475302284818ed6369673644b895157510391e", kill_on_drop: false }`
[INFO] [stdout] 0f1cc2af53957cf36358e4208d475302284818ed6369673644b895157510391e
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/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" "+1.55.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] c6403b7afc6363d7547c4a92f016087ec9c8090acdaba9c6a2554271877c107e
[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" "c6403b7afc6363d7547c4a92f016087ec9c8090acdaba9c6a2554271877c107e", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.92
[INFO] [stderr]    Compiling syn v0.15.30
[INFO] [stderr]    Compiling syn v1.0.33
[INFO] [stderr]    Compiling cpal v0.13.3
[INFO] [stderr]    Compiling wayland-sys v0.28.5
[INFO] [stderr]    Compiling crossbeam-utils v0.2.2
[INFO] [stderr]    Compiling alsa-sys v0.3.1
[INFO] [stderr]    Compiling nom v6.1.2
[INFO] [stderr]    Compiling walkdir v2.3.2
[INFO] [stderr]    Compiling gl_generator v0.13.1
[INFO] [stderr]    Compiling gl_generator v0.14.0
[INFO] [stderr]    Compiling gl_generator v0.11.0
[INFO] [stderr]    Compiling quote v0.6.12
[INFO] [stderr]    Compiling piston2d-graphics v0.39.0
[INFO] [stderr]    Compiling wayland-scanner v0.28.5
[INFO] [stderr]    Compiling gfx_core v0.9.2
[INFO] [stderr]    Compiling num-iter v0.1.37
[INFO] [stderr]    Compiling crossbeam-epoch v0.3.1
[INFO] [stderr]    Compiling andrew v0.3.1
[INFO] [stderr]    Compiling crossbeam-deque v0.2.0
[INFO] [stderr]    Compiling gfx_gl v0.6.0
[INFO] [stderr]    Compiling glutin_glx_sys v0.1.7
[INFO] [stderr]    Compiling glutin_egl_sys v0.1.4
[INFO] [stderr]    Compiling gl v0.13.0
[INFO] [stderr]    Compiling gfx v0.18.2
[INFO] [stderr]    Compiling wayland-client v0.28.5
[INFO] [stderr]    Compiling wayland-protocols v0.28.5
[INFO] [stderr]    Compiling xcursor v0.3.3
[INFO] [stderr]    Compiling nix v0.20.0
[INFO] [stderr]    Compiling jobserver v0.1.21
[INFO] [stderr]    Compiling num_cpus v1.10.0
[INFO] [stderr]    Compiling nix v0.18.0
[INFO] [stderr]    Compiling parking_lot_core v0.8.3
[INFO] [stderr]    Compiling iovec v0.1.4
[INFO] [stderr]    Compiling net2 v0.2.37
[INFO] [stderr]    Compiling x11-dl v2.18.5
[INFO] [stderr]    Compiling memmap2 v0.1.0
[INFO] [stderr]    Compiling shared_library v0.1.9
[INFO] [stderr]    Compiling raw-window-handle v0.3.3
[INFO] [stderr]    Compiling getrandom v0.2.2
[INFO] [stderr]    Compiling atty v0.2.14
[INFO] [stderr]    Compiling rayon-core v1.4.1
[INFO] [stderr]    Compiling cc v1.0.65
[INFO] [stderr]    Compiling serde_derive v1.0.90
[INFO] [stderr]    Compiling parking_lot v0.11.1
[INFO] [stderr]    Compiling mio v0.6.23
[INFO] [stderr]    Compiling rand_core v0.6.2
[INFO] [stderr]    Compiling osmesa-sys v0.1.2
[INFO] [stderr]    Compiling clap v2.33.3
[INFO] [stderr]    Compiling rand_chacha v0.3.0
[INFO] [stderr]    Compiling rayon v1.0.3
[INFO] [stderr]    Compiling mio-extras v2.0.6
[INFO] [stderr]    Compiling rand v0.8.3
[INFO] [stderr]    Compiling libloading v0.5.0
[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-1.0.33/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"' --cfg 'feature="visit"' -C metadata=0b66db0dddc59d48 -C extra-filename=-0b66db0dddc59d48 --out-dir /opt/rustwide/target/debug/deps -L dependency=/opt/rustwide/target/debug/deps --extern proc_macro2=/opt/rustwide/target/debug/deps/libproc_macro2-3f04f2ad820649d2.rmeta --extern quote=/opt/rustwide/target/debug/deps/libquote-fc256f93b2f4a0d7.rmeta --extern unicode_xid=/opt/rustwide/target/debug/deps/libunicode_xid-4f4df54432f3a5d3.rmeta --cap-lints allow --cap-lints=warn --cfg syn_disable_nightly_tests` (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" "c6403b7afc6363d7547c4a92f016087ec9c8090acdaba9c6a2554271877c107e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c6403b7afc6363d7547c4a92f016087ec9c8090acdaba9c6a2554271877c107e", kill_on_drop: false }`
[INFO] [stdout] c6403b7afc6363d7547c4a92f016087ec9c8090acdaba9c6a2554271877c107e