[INFO] crate sandbox 0.1.1 is already in cache
[INFO] testing sandbox-0.1.1 against beta-2020-07-24 for beta-1.46-1
[INFO] extracting crate sandbox 0.1.1 into /workspace/builds/worker-4/source
[INFO] validating manifest of crates.io crate sandbox 0.1.1 on toolchain beta-2020-07-24
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2020-07-24" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking crates.io crate sandbox 0.1.1
[INFO] finished tweaking crates.io crate sandbox 0.1.1
[INFO] tweaked toml for crates.io crate sandbox 0.1.1 written to /workspace/builds/worker-4/source/Cargo.toml
[INFO] crate crates.io crate sandbox 0.1.1 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2020-07-24" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[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" "MAP_USER_ID=0" "-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" "--network" "none" "rustops/crates-build-env@sha256:a636fd89d022f18117e1dc8fb37a0a009933cdbbe082814857f0e2024962d47c" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2020-07-24" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 57eb3d0860acaff7033b88b40e98986b2331493e11e2ddbaaf6004d73eaf679f
[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" "57eb3d0860acaff7033b88b40e98986b2331493e11e2ddbaaf6004d73eaf679f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "57eb3d0860acaff7033b88b40e98986b2331493e11e2ddbaaf6004d73eaf679f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "57eb3d0860acaff7033b88b40e98986b2331493e11e2ddbaaf6004d73eaf679f", kill_on_drop: false }`
[INFO] [stdout] 57eb3d0860acaff7033b88b40e98986b2331493e11e2ddbaaf6004d73eaf679f
[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" "MAP_USER_ID=0" "-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" "--network" "none" "rustops/crates-build-env@sha256:a636fd89d022f18117e1dc8fb37a0a009933cdbbe082814857f0e2024962d47c" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2020-07-24" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 977df08e8f77143634c58c9cf00a994a5bf4b93c181ad4a1d7a181b1045b42b2
[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" "977df08e8f77143634c58c9cf00a994a5bf4b93c181ad4a1d7a181b1045b42b2", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling xml-rs v0.8.0
[INFO] [stderr]    Compiling bindgen v0.52.0
[INFO] [stderr]    Compiling syn v1.0.14
[INFO] [stderr]    Compiling arrayvec v0.5.1
[INFO] [stderr]    Compiling xdg v2.2.0
[INFO] [stderr]    Compiling vulkano v0.16.0
[INFO] [stderr]    Compiling half v1.4.0
[INFO] [stderr]    Compiling vk-sys v0.5.0
[INFO] [stderr]    Compiling cgmath v0.17.0
[INFO] [stderr]    Compiling num-rational v0.2.3
[INFO] [stderr]    Compiling crossbeam-utils v0.6.6
[INFO] [stderr]    Compiling libloading v0.5.2
[INFO] [stderr]    Compiling cmake v0.1.42
[INFO] [stderr]    Compiling x11-dl v2.18.4
[INFO] [stderr]    Compiling gif v0.9.2
[INFO] [stderr]    Compiling inflate v0.3.4
[INFO] [stderr]    Compiling atty v0.2.14
[INFO] [stderr]    Compiling which v3.1.0
[INFO] [stderr]    Compiling shared_library v0.1.9
[INFO] [stderr]    Compiling raw-window-handle v0.3.3
[INFO] [stderr]    Compiling rand v0.5.6
[INFO] [stderr]    Compiling stb_truetype v0.3.1
[INFO] [stderr]    Compiling deflate v0.7.20
[INFO] [stderr]    Compiling rustc-hash v1.0.1
[INFO] [stderr]    Compiling nom v4.2.3
[INFO] [stderr]    Compiling clap v2.33.0
[INFO] [stderr]    Compiling approx v0.3.2
[INFO] [stderr]    Compiling ordered-float v1.0.2
[INFO] [stderr]    Compiling line_drawing v0.7.0
[INFO] [stderr]    Compiling num-traits v0.1.43
[INFO] [stderr]    Compiling rand v0.6.5
[INFO] [stderr]    Compiling rand_pcg v0.2.1
[INFO] [stderr]    Compiling crossbeam-channel v0.3.9
[INFO] [stderr]    Compiling num-rational v0.1.42
[INFO] [stderr]    Compiling parking_lot_core v0.6.2
[INFO] [stderr]    Compiling enum_primitive v0.1.1
[INFO] [stderr]    Compiling shaderc-sys v0.6.1
[INFO] [stderr]    Compiling env_logger v0.7.1
[INFO] [stderr]    Compiling rusttype v0.8.2
[INFO] [stderr]    Compiling tiff v0.3.1
[INFO] [stderr]    Compiling wayland-scanner v0.21.13
[INFO] [stderr]    Compiling png v0.11.0
[INFO] [stderr]    Compiling png v0.15.3
[INFO] [stderr]    Compiling dlib v0.4.1
[INFO] [stderr]    Compiling clang-sys v0.28.1
[INFO] [stderr]    Compiling twox-hash v1.5.0
[INFO] [stderr]    Compiling parking_lot v0.9.0
[INFO] [stderr]    Compiling laminar v0.3.2
[INFO] [stderr]    Compiling cexpr v0.3.6
[INFO] [stderr]    Compiling rusttype v0.7.9
[INFO] [stderr]    Compiling wayland-sys v0.21.13
[INFO] [stderr]    Compiling andrew v0.2.1
[INFO] [stderr]    Compiling wayland-commons v0.21.13
[INFO] [stderr]    Compiling jpeg-decoder v0.1.18
[INFO] [stderr]    Compiling image v0.18.0
[INFO] [stderr]    Compiling image v0.22.4
[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-1.0.14/src/lib.rs --error-format=json --json=diagnostic-rendered-ansi --crate-type lib --emit=dep-info,metadata,link -Cembed-bitcode=no -C debuginfo=2 --cfg 'feature="clone-impls"' --cfg 'feature="default"' --cfg 'feature="derive"' --cfg 'feature="parsing"' --cfg 'feature="printing"' --cfg 'feature="proc-macro"' --cfg 'feature="quote"' --cfg 'feature="visit"' -C metadata=736e686ab49cd730 -C extra-filename=-736e686ab49cd730 --out-dir /opt/rustwide/target/debug/deps -L dependency=/opt/rustwide/target/debug/deps --extern proc_macro2=/opt/rustwide/target/debug/deps/libproc_macro2-cca29f691eaa7111.rmeta --extern quote=/opt/rustwide/target/debug/deps/libquote-ff5758c045625bdf.rmeta --extern unicode_xid=/opt/rustwide/target/debug/deps/libunicode_xid-00e718d0d0f7c0e6.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] The following warnings were emitted during compilation:
[INFO] [stderr] 
[INFO] [stderr] warning: Checking for system installed libraries.  Use --features = build-from-source to disable this behavior
[INFO] [stderr] warning: System installed library not found.  Falling back to build from source
[INFO] [stderr] 
[INFO] [stderr] error: build failed
[INFO] running `Command { std: "docker" "inspect" "977df08e8f77143634c58c9cf00a994a5bf4b93c181ad4a1d7a181b1045b42b2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "977df08e8f77143634c58c9cf00a994a5bf4b93c181ad4a1d7a181b1045b42b2", kill_on_drop: false }`
[INFO] [stdout] 977df08e8f77143634c58c9cf00a994a5bf4b93c181ad4a1d7a181b1045b42b2