[INFO] fetching crate kakapo 0.0.1...
[INFO] checking kakapo-0.0.1 against master#a5f164faad4a2fed606b8160fd7ecd2d5cbba381 for pr-84920
[INFO] extracting crate kakapo 0.0.1 into /workspace/builds/worker-9/source
[INFO] validating manifest of crates.io crate kakapo 0.0.1 on toolchain a5f164faad4a2fed606b8160fd7ecd2d5cbba381
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+a5f164faad4a2fed606b8160fd7ecd2d5cbba381" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate kakapo 0.0.1
[INFO] finished tweaking crates.io crate kakapo 0.0.1
[INFO] tweaked toml for crates.io crate kakapo 0.0.1 written to /workspace/builds/worker-9/source/Cargo.toml
[INFO] crate crates.io crate kakapo 0.0.1 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+a5f164faad4a2fed606b8160fd7ecd2d5cbba381" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/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@sha256:20528e8c29e4536546f0102ce88568b16ea7538393a33fcca951030f7af10457" "/opt/rustwide/cargo-home/bin/cargo" "+a5f164faad4a2fed606b8160fd7ecd2d5cbba381" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 468e80e94b48bc2c885adc2aece1e99d951eb177033da70ed07a1ef188c3ad8b
[INFO] running `Command { std: "docker" "start" "-a" "468e80e94b48bc2c885adc2aece1e99d951eb177033da70ed07a1ef188c3ad8b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "468e80e94b48bc2c885adc2aece1e99d951eb177033da70ed07a1ef188c3ad8b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "468e80e94b48bc2c885adc2aece1e99d951eb177033da70ed07a1ef188c3ad8b", kill_on_drop: false }`
[INFO] [stdout] 468e80e94b48bc2c885adc2aece1e99d951eb177033da70ed07a1ef188c3ad8b
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/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" "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@sha256:20528e8c29e4536546f0102ce88568b16ea7538393a33fcca951030f7af10457" "/opt/rustwide/cargo-home/bin/cargo" "+a5f164faad4a2fed606b8160fd7ecd2d5cbba381" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 2602bca577275372d44f3749be1e4334fc21ed0b62c775f6f06fb1e25a8deadf
[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" "2602bca577275372d44f3749be1e4334fc21ed0b62c775f6f06fb1e25a8deadf", kill_on_drop: false }`
[INFO] [stderr]    Compiling log v0.4.11
[INFO] [stderr]     Checking once_cell v1.5.2
[INFO] [stderr]    Compiling xml-rs v0.8.3
[INFO] [stderr]    Compiling nix v0.18.0
[INFO] [stderr]    Compiling proc-macro-nested v0.1.6
[INFO] [stderr]     Checking futures-sink v0.3.8
[INFO] [stderr]     Checking ttf-parser v0.6.2
[INFO] [stderr]     Checking futures-core v0.3.8
[INFO] [stderr]     Checking scoped-tls v1.0.0
[INFO] [stderr]     Checking arrayvec v0.5.2
[INFO] [stderr]     Checking ab_glyph_rasterizer v0.1.4
[INFO] [stderr]    Compiling anyhow v1.0.35
[INFO] [stderr]     Checking inplace_it v0.3.2
[INFO] [stderr]     Checking xdg v2.2.0
[INFO] [stderr]    Compiling fs_extra v1.2.0
[INFO] [stderr]     Checking copyless v0.1.5
[INFO] [stderr]     Checking lazycell v1.3.0
[INFO] [stderr]     Checking typed-arena v2.0.1
[INFO] [stderr]     Checking libloading v0.6.6
[INFO] [stderr]    Compiling wayland-sys v0.28.2
[INFO] [stderr]    Compiling x11 v2.18.2
[INFO] [stderr]     Checking instant v0.1.9
[INFO] [stderr]    Compiling x11-dl v2.18.5
[INFO] [stderr]    Compiling num-traits v0.2.14
[INFO] [stderr]    Compiling nom v6.0.1
[INFO] [stderr]     Checking lock_api v0.4.2
[INFO] [stderr]     Checking walkdir v2.3.1
[INFO] [stderr]     Checking futures-channel v0.3.8
[INFO] [stderr]     Checking futures-task v0.3.8
[INFO] [stderr]     Checking tracing v0.1.22
[INFO] [stderr]     Checking dlib v0.4.2
[INFO] [stderr]     Checking ash v0.31.0
[INFO] [stderr]     Checking raw-window-handle v0.3.3
[INFO] [stderr]     Checking parking_lot_core v0.8.1
[INFO] [stderr]     Checking iovec v0.1.4
[INFO] [stderr]     Checking net2 v0.2.37
[INFO] [stderr]     Checking memmap2 v0.1.0
[INFO] [stderr]    Compiling jobserver v0.1.21
[INFO] [stderr]    Compiling quote v1.0.7
[INFO] [stderr]     Checking wgpu-types v0.6.1
[INFO] [stderr]     Checking gfx-hal v0.6.0
[INFO] [stderr]     Checking parking_lot v0.11.1
[INFO] [stderr]    Compiling syn v1.0.54
[INFO] [stderr]    Compiling wayland-scanner v0.28.2
[INFO] [stderr]     Checking mio v0.6.23
[INFO] [stderr]    Compiling cc v1.0.66
[INFO] [stderr]     Checking owned_ttf_parser v0.6.0
[INFO] [stderr]     Checking rusttype v0.9.2
[INFO] [stderr]    Compiling cmake v0.1.45
[INFO] [stderr]     Checking spirv_headers v1.5.0
[INFO] [stderr]     Checking andrew v0.3.1
[INFO] [stderr]     Checking mio-extras v2.0.6
[INFO] [stderr]    Compiling shaderc-sys v0.6.3
[INFO] [stderr]    Compiling wayland-client v0.28.2
[INFO] [stderr]    Compiling wayland-protocols v0.28.2
[INFO] [stderr]     Checking xcursor v0.3.3
[INFO] [stderr]     Checking wayland-commons v0.28.2
[INFO] [stderr]     Checking calloop v0.6.5
[INFO] [stderr]     Checking gfx-memory v0.2.2
[INFO] [stderr]     Checking gfx-backend-empty v0.6.0
[INFO] [stderr]     Checking gfx-descriptor v0.2.0
[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-1.0.54/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=a71c0d22b26e2260 -C extra-filename=-a71c0d22b26e2260 --out-dir /opt/rustwide/target/debug/deps -L dependency=/opt/rustwide/target/debug/deps --extern proc_macro2=/opt/rustwide/target/debug/deps/libproc_macro2-ba80430fb18d8252.rmeta --extern quote=/opt/rustwide/target/debug/deps/libquote-42bf3df2a4136a24.rmeta --extern unicode_xid=/opt/rustwide/target/debug/deps/libunicode_xid-4182131ee577b5da.rmeta --cap-lints allow --cap-lints=forbid` (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" "2602bca577275372d44f3749be1e4334fc21ed0b62c775f6f06fb1e25a8deadf", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "2602bca577275372d44f3749be1e4334fc21ed0b62c775f6f06fb1e25a8deadf", kill_on_drop: false }`
[INFO] [stdout] 2602bca577275372d44f3749be1e4334fc21ed0b62c775f6f06fb1e25a8deadf