[INFO] fetching crate dotrix 0.1.1...
[INFO] testing dotrix-0.1.1 against 1.49.0 for beta-1.50-1
[INFO] extracting crate dotrix 0.1.1 into /workspace/builds/worker-10/source
[INFO] validating manifest of crates.io crate dotrix 0.1.1 on toolchain 1.49.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.49.0" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking crates.io crate dotrix 0.1.1
[INFO] removed 0 missing examples
[INFO] finished tweaking crates.io crate dotrix 0.1.1
[INFO] tweaked toml for crates.io crate dotrix 0.1.1 written to /workspace/builds/worker-10/source/Cargo.toml
[INFO] crate crates.io crate dotrix 0.1.1 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.49.0" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-10/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-10/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" "rustops/crates-build-env@sha256:b8eeb62f26c39b23691079a6cb6de528d8e88b4d71a8f6b1d30f8ba7d9c16de9" "/opt/rustwide/cargo-home/bin/cargo" "+1.49.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 0bcfde4aa5d2722467cd76bb2c920849b7a082afaf3d850678e5114addc11095
[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" "0bcfde4aa5d2722467cd76bb2c920849b7a082afaf3d850678e5114addc11095", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "0bcfde4aa5d2722467cd76bb2c920849b7a082afaf3d850678e5114addc11095", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "0bcfde4aa5d2722467cd76bb2c920849b7a082afaf3d850678e5114addc11095", kill_on_drop: false }`
[INFO] [stdout] 0bcfde4aa5d2722467cd76bb2c920849b7a082afaf3d850678e5114addc11095
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-10/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-10/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" "rustops/crates-build-env@sha256:b8eeb62f26c39b23691079a6cb6de528d8e88b4d71a8f6b1d30f8ba7d9c16de9" "/opt/rustwide/cargo-home/bin/cargo" "+1.49.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 98b5081fa94c0f63628497c477fdc81d98301859d3351903155fb85c914a0fa3
[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" "98b5081fa94c0f63628497c477fdc81d98301859d3351903155fb85c914a0fa3", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.80
[INFO] [stderr]    Compiling syn v1.0.48
[INFO] [stderr]    Compiling serde v1.0.117
[INFO] [stderr]    Compiling serde_json v1.0.59
[INFO] [stderr]    Compiling bit-vec v0.6.2
[INFO] [stderr]    Compiling arrayvec v0.5.2
[INFO] [stderr]    Compiling inflections v1.1.1
[INFO] [stderr]    Compiling inplace_it v0.3.2
[INFO] [stderr]    Compiling cgmath v0.17.0
[INFO] [stderr]    Compiling copyless v0.1.5
[INFO] [stderr]    Compiling winit v0.23.0
[INFO] [stderr]    Compiling ansi_term v0.12.1
[INFO] [stderr]    Compiling unicode-segmentation v1.7.0
[INFO] [stderr]    Compiling typed-arena v2.0.1
[INFO] [stderr]    Compiling strum v0.19.5
[INFO] [stderr]    Compiling wayland-sys v0.28.2
[INFO] [stderr]    Compiling tracing-core v0.1.17
[INFO] [stderr]    Compiling instant v0.1.8
[INFO] [stderr]    Compiling lock_api v0.4.1
[INFO] [stderr]    Compiling x11 v2.18.2
[INFO] [stderr]    Compiling sharded-slab v0.1.0
[INFO] [stderr]    Compiling regex v1.4.2
[INFO] [stderr]    Compiling dlib v0.4.2
[INFO] [stderr]    Compiling ash v0.31.0
[INFO] [stderr]    Compiling rusttype v0.9.2
[INFO] [stderr]    Compiling wgpu-types v0.6.1
[INFO] [stderr]    Compiling regex-automata v0.1.9
[INFO] [stderr]    Compiling bit-set v0.5.2
[INFO] [stderr]    Compiling wayland-scanner v0.28.2
[INFO] [stderr]    Compiling png v0.16.7
[INFO] [stderr]    Compiling spirv_headers v1.5.0
[INFO] [stderr]    Compiling approx v0.3.2
[INFO] [stderr]    Compiling heck v0.3.1
[INFO] [stderr]    Compiling xcursor v0.3.2
[INFO] [stderr]    Compiling tracing-log v0.1.1
[INFO] [stderr]    Compiling andrew v0.3.1
[INFO] [stderr]    Compiling matchers v0.0.1
[INFO] [stderr]    Compiling wayland-client v0.28.2
[INFO] [stderr]    Compiling wayland-protocols v0.28.2
[INFO] [stderr]    Compiling raw-window-handle v0.3.3
[INFO] [stderr]    Compiling nix v0.18.0
[INFO] [stderr]    Compiling jobserver v0.1.21
[INFO] [stderr]    Compiling num_cpus v1.13.0
[INFO] [stderr]    Compiling parking_lot_core v0.8.0
[INFO] [stderr]    Compiling iovec v0.1.4
[INFO] [stderr]    Compiling time v0.1.44
[INFO] [stderr]    Compiling net2 v0.2.35
[INFO] [stderr]    Compiling rand_os v0.1.3
[INFO] [stderr]    Compiling memmap v0.7.0
[INFO] [stderr]    Compiling thread-id v3.3.0
[INFO] [stderr]    Compiling x11-dl v2.18.5
[INFO] [stderr]    Compiling rayon-core v1.9.0
[INFO] [stderr]    Compiling cc v1.0.62
[INFO] [stderr]    Compiling gfx-hal v0.6.0
[INFO] [stderr]    Compiling rand v0.6.5
[INFO] [stderr]    Compiling mio v0.6.22
[INFO] [stderr]    Compiling parking_lot v0.11.0
[INFO] [stderr]    Compiling chrono v0.4.19
[INFO] [stderr]    Compiling cmake v0.1.45
[INFO] [stderr]    Compiling rayon v1.5.0
[INFO] [stderr]    Compiling mio-extras v2.0.6
[INFO] [stderr]    Compiling shaderc-sys v0.7.0
[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-1.0.48/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"' --cfg 'feature="visit-mut"' -C metadata=3cc54bb4ff0232c8 -C extra-filename=-3cc54bb4ff0232c8 --out-dir /opt/rustwide/target/debug/deps -L dependency=/opt/rustwide/target/debug/deps --extern proc_macro2=/opt/rustwide/target/debug/deps/libproc_macro2-b8449736663a1660.rmeta --extern quote=/opt/rustwide/target/debug/deps/libquote-ac1b49ec88ef2fec.rmeta --extern unicode_xid=/opt/rustwide/target/debug/deps/libunicode_xid-1c0accd586890c80.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: shaderc: searching for native shaderc libraries on system;  use '--features build-from-source' to force building from source code
[INFO] [stderr] warning: shaderc: cannot find native shaderc library on system; falling back to build from source
[INFO] [stderr] 
[INFO] [stderr] error: build failed
[INFO] running `Command { std: "docker" "inspect" "98b5081fa94c0f63628497c477fdc81d98301859d3351903155fb85c914a0fa3", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "98b5081fa94c0f63628497c477fdc81d98301859d3351903155fb85c914a0fa3", kill_on_drop: false }`
[INFO] [stdout] 98b5081fa94c0f63628497c477fdc81d98301859d3351903155fb85c914a0fa3