[INFO] cloning repository https://github.com/DiscoBiscuit99/i_has_feet
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/DiscoBiscuit99/i_has_feet" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FDiscoBiscuit99%2Fi_has_feet", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FDiscoBiscuit99%2Fi_has_feet'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] fefda00a9c73671bce684449bb26006093cd16d3
[INFO] checking DiscoBiscuit99/i_has_feet against master#33fdb797f59421c7bbecaa4588ed5d7a31a9494a for pr-87190-3
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FDiscoBiscuit99%2Fi_has_feet" "/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/DiscoBiscuit99/i_has_feet on toolchain 33fdb797f59421c7bbecaa4588ed5d7a31a9494a
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+33fdb797f59421c7bbecaa4588ed5d7a31a9494a" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/DiscoBiscuit99/i_has_feet
[INFO] finished tweaking git repo https://github.com/DiscoBiscuit99/i_has_feet
[INFO] tweaked toml for git repo https://github.com/DiscoBiscuit99/i_has_feet written to /workspace/builds/worker-4/source/Cargo.toml
[INFO] crate git repo https://github.com/DiscoBiscuit99/i_has_feet already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+33fdb797f59421c7bbecaa4588ed5d7a31a9494a" "fetch" "--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-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" "+33fdb797f59421c7bbecaa4588ed5d7a31a9494a" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 372f11d39e6d615eea65fe3b8c7c8ca586a7250d6be99bcfccfdc7f4a4db3d82
[INFO] running `Command { std: "docker" "start" "-a" "372f11d39e6d615eea65fe3b8c7c8ca586a7250d6be99bcfccfdc7f4a4db3d82", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "372f11d39e6d615eea65fe3b8c7c8ca586a7250d6be99bcfccfdc7f4a4db3d82", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "372f11d39e6d615eea65fe3b8c7c8ca586a7250d6be99bcfccfdc7f4a4db3d82", kill_on_drop: false }`
[INFO] [stdout] 372f11d39e6d615eea65fe3b8c7c8ca586a7250d6be99bcfccfdc7f4a4db3d82
[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=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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+33fdb797f59421c7bbecaa4588ed5d7a31a9494a" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] d5ae1b453c7ed90360c1d7ecf4267cd2092bc3d665500e353fd2291cdf4fd245
[INFO] running `Command { std: "docker" "start" "-a" "d5ae1b453c7ed90360c1d7ecf4267cd2092bc3d665500e353fd2291cdf4fd245", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.71
[INFO] [stderr]    Compiling syn v1.0.29
[INFO] [stderr]    Compiling libm v0.2.1
[INFO] [stderr]    Compiling byteorder v1.3.4
[INFO] [stderr]    Compiling proc-macro2 v0.4.30
[INFO] [stderr]    Compiling log v0.4.8
[INFO] [stderr]    Compiling semver-parser v0.7.0
[INFO] [stderr]    Compiling syn v0.15.44
[INFO] [stderr]    Compiling libloading v0.6.2
[INFO] [stderr]    Compiling nix v0.14.1
[INFO] [stderr]    Compiling num-derive v0.2.5
[INFO] [stderr]     Checking atom v0.3.5
[INFO] [stderr]     Checking void v1.0.2
[INFO] [stderr]     Checking lzw v0.10.0
[INFO] [stderr]    Compiling cfg-if v0.1.10
[INFO] [stderr]     Checking color_quant v1.0.1
[INFO] [stderr]    Compiling ryu v1.0.4
[INFO] [stderr]     Checking scoped_threadpool v0.1.9
[INFO] [stderr]    Compiling rand_core v0.4.2
[INFO] [stderr]    Compiling autocfg v0.1.7
[INFO] [stderr]     Checking itoa v0.4.5
[INFO] [stderr]     Checking ahash v0.3.5
[INFO] [stderr]    Compiling ppv-lite86 v0.2.8
[INFO] [stderr]     Checking mint v0.5.5
[INFO] [stderr]     Checking arrayvec v0.5.1
[INFO] [stderr]     Checking slab v0.4.2
[INFO] [stderr]     Checking rawpointer v0.2.1
[INFO] [stderr]     Checking colorful v0.2.1
[INFO] [stderr]    Compiling edit-distance v2.1.0
[INFO] [stderr]    Compiling rustversion v1.0.2
[INFO] [stderr]    Compiling siphasher v0.2.3
[INFO] [stderr]    Compiling inventory v0.1.6
[INFO] [stderr]    Compiling tinystr v0.3.2
[INFO] [stderr]     Checking approx v0.1.1
[INFO] [stderr]     Checking objekt v0.1.2
[INFO] [stderr]    Compiling cgmath v0.16.1
[INFO] [stderr]    Compiling cpal v0.11.0
[INFO] [stderr]     Checking xi-unicode v0.2.0
[INFO] [stderr]     Checking claxon v0.4.2
[INFO] [stderr]     Checking stable_deref_trait v1.1.1
[INFO] [stderr]     Checking hound v3.4.0
[INFO] [stderr]     Checking fluent-syntax v0.9.3
[INFO] [stderr]    Compiling num-traits v0.2.11
[INFO] [stderr]    Compiling num-bigint v0.2.6
[INFO] [stderr]    Compiling num-rational v0.2.4
[INFO] [stderr]     Checking lock_api v0.3.4
[INFO] [stderr]     Checking crossbeam-utils v0.6.6
[INFO] [stderr]    Compiling num-complex v0.2.4
[INFO] [stderr]    Compiling x11 v2.18.2
[INFO] [stderr]    Compiling hashbrown v0.7.2
[INFO] [stderr]    Compiling alsa-sys v0.1.2
[INFO] [stderr]    Compiling servo-fontconfig-sys v4.0.9
[INFO] [stderr]     Checking itertools v0.8.2
[INFO] [stderr]     Checking walkdir v2.3.1
[INFO] [stderr]    Compiling nom v5.1.1
[INFO] [stderr]    Compiling thread_local v1.0.1
[INFO] [stderr]    Compiling cmake v0.1.44
[INFO] [stderr]    Compiling proc-macro-error-attr v1.0.2
[INFO] [stderr]    Compiling proc-macro-error v1.0.2
[INFO] [stderr]    Compiling minimp3-sys v0.3.2
[INFO] [stderr]     Checking matrixmultiply v0.2.3
[INFO] [stderr]    Compiling phf_shared v0.7.24
[INFO] [stderr]     Checking gif v0.10.3
[INFO] [stderr]    Compiling rand_core v0.3.1
[INFO] [stderr]    Compiling rand_jitter v0.1.4
[INFO] [stderr]    Compiling semver v0.9.0
[INFO] [stderr]    Compiling proc-macro2 v1.0.17
[INFO] [stderr]    Compiling unic-langid-impl v0.8.0
[INFO] [stderr]     Checking crc32fast v1.2.0
[INFO] [stderr]    Compiling rand_isaac v0.1.1
[INFO] [stderr]    Compiling rand_xorshift v0.1.1
[INFO] [stderr]    Compiling rand_hc v0.1.0
[INFO] [stderr]     Checking crossbeam-utils v0.7.2
[INFO] [stderr]     Checking generic-array v0.13.2
[INFO] [stderr]    Compiling regex v1.3.9
[INFO] [stderr]     Checking crossbeam-channel v0.3.9
[INFO] [stderr]     Checking crossbeam-queue v0.1.2
[INFO] [stderr]     Checking phf v0.7.24
[INFO] [stderr]    Compiling quote v1.0.6
[INFO] [stderr]    Compiling rand_pcg v0.1.2
[INFO] [stderr]    Compiling rand_chacha v0.1.1
[INFO] [stderr]    Compiling rand v0.6.5
[INFO] [stderr]     Checking dlib v0.4.2
[INFO] [stderr]     Checking crossbeam-epoch v0.8.2
[INFO] [stderr]     Checking crossbeam-queue v0.2.2
[INFO] [stderr]     Checking crossbeam-channel v0.4.2
[INFO] [stderr]     Checking rustc_version v0.2.3
[INFO] [stderr]     Checking wayland-sys v0.21.13
[INFO] [stderr]    Compiling servo-freetype-sys v4.0.5
[INFO] [stderr]    Compiling expat-sys v2.1.6
[INFO] [stderr]     Checking crossbeam-deque v0.7.3
[INFO] [stderr]    Compiling quote v0.6.13
[INFO] [stderr]     Checking stb_truetype v0.3.1
[INFO] [stderr]     Checking fxhash v0.2.1
[INFO] [stderr]     Checking deflate v0.7.20
[INFO] [stderr]     Checking base64 v0.10.1
[INFO] [stderr]     Checking ogg v0.7.0
[INFO] [stderr]    Compiling getrandom v0.1.14
[INFO] [stderr]    Compiling rand_os v0.1.3
[INFO] [stderr]    Compiling time v0.1.43
[INFO] [stderr]    Compiling dirs-sys v0.3.4
[INFO] [stderr]     Checking num_cpus v1.13.0
[INFO] [stderr]     Checking backtrace v0.3.48
[INFO] [stderr]     Checking memmap v0.7.0
[INFO] [stderr]     Checking x11-dl v2.18.5
[INFO] [stderr]     Checking raw-window-handle v0.3.3
[INFO] [stderr]     Checking shared_library v0.1.9
[INFO] [stderr]     Checking raw-window-handle v0.1.2
[INFO] [stderr]     Checking rand v0.4.6
[INFO] [stderr]     Checking slice-deque v0.3.0
[INFO] [stderr]     Checking atty v0.2.14
[INFO] [stderr]    Compiling xcb v0.8.2
[INFO] [stderr]    Compiling wayland-scanner v0.21.13
[INFO] [stderr]    Compiling syn v0.14.9
[INFO] [stderr]     Checking type-map v0.3.0
[INFO] [stderr]     Checking lewton v0.10.1
[INFO] [stderr]    Compiling rand_core v0.5.1
[INFO] [stderr]     Checking rayon-core v1.7.0
[INFO] [stderr]     Checking ash v0.29.0
[INFO] [stderr]    Compiling dirs v2.0.2
[INFO] [stderr]     Checking amethyst_error v0.5.0
[INFO] [stderr]     Checking colored v1.9.3
[INFO] [stderr]     Checking png v0.15.3
[INFO] [stderr]     Checking rayon v1.3.0
[INFO] [stderr]    Compiling rand_chacha v0.2.2
[INFO] [stderr]    Compiling parking_lot_core v0.6.2
[INFO] [stderr]    Compiling parking_lot v0.9.0
[INFO] [stderr]    Compiling lexical-core v0.4.6
[INFO] [stderr]    Compiling lexical v2.2.2
[INFO] [stderr]    Compiling rustc_version_runtime v0.1.5
[INFO] [stderr]     Checking minimp3 v0.3.5
[INFO] [stderr]     Checking freetype v0.4.1
[INFO] [stderr]     Checking rand_pcg v0.2.1
[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-1.0.29/src/lib.rs --error-format=json --json=diagnostic-rendered-ansi,artifacts --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="fold"' --cfg 'feature="full"' --cfg 'feature="parsing"' --cfg 'feature="printing"' --cfg 'feature="proc-macro"' --cfg 'feature="quote"' --cfg 'feature="visit"' -C metadata=5aa7f94883a7576c -C extra-filename=-5aa7f94883a7576c --out-dir /opt/rustwide/target/debug/deps -L dependency=/opt/rustwide/target/debug/deps --extern proc_macro2=/opt/rustwide/target/debug/deps/libproc_macro2-08fdda497c33fad0.rmeta --extern quote=/opt/rustwide/target/debug/deps/libquote-1fe550dc0977ced2.rmeta --extern unicode_xid=/opt/rustwide/target/debug/deps/libunicode_xid-1256a373de2a2211.rmeta --cap-lints allow --cap-lints=forbid` (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" "d5ae1b453c7ed90360c1d7ecf4267cd2092bc3d665500e353fd2291cdf4fd245", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d5ae1b453c7ed90360c1d7ecf4267cd2092bc3d665500e353fd2291cdf4fd245", kill_on_drop: false }`
[INFO] [stdout] d5ae1b453c7ed90360c1d7ecf4267cd2092bc3d665500e353fd2291cdf4fd245