[INFO] cloning repository https://github.com/cameron1024/flatter
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/cameron1024/flatter" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fcameron1024%2Fflatter", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fcameron1024%2Fflatter'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 48b2816224b7434e09427e48e7dbfe3a7bd1b430
[INFO] testing cameron1024/flatter against master#404c8471aba60c2d837fa728e7c729a0f52d5830 for pr-87041-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fcameron1024%2Fflatter" "/workspace/builds/worker-16/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-16/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/cameron1024/flatter on toolchain 404c8471aba60c2d837fa728e7c729a0f52d5830
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+404c8471aba60c2d837fa728e7c729a0f52d5830" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/cameron1024/flatter
[INFO] finished tweaking git repo https://github.com/cameron1024/flatter
[INFO] tweaked toml for git repo https://github.com/cameron1024/flatter written to /workspace/builds/worker-16/source/Cargo.toml
[INFO] crate git repo https://github.com/cameron1024/flatter already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+404c8471aba60c2d837fa728e7c729a0f52d5830" "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-16/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-16/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:a429bb59b7a3b4e7270a4b4c243bb115fc561d8f62ec34ef63a0a36cabf65dfd" "/opt/rustwide/cargo-home/bin/cargo" "+404c8471aba60c2d837fa728e7c729a0f52d5830" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] a1ac5529a85ff5e5b3e0fc3f833781f0e22a8c408cc47219f0d3893f10469b20
[INFO] running `Command { std: "docker" "start" "-a" "a1ac5529a85ff5e5b3e0fc3f833781f0e22a8c408cc47219f0d3893f10469b20", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "a1ac5529a85ff5e5b3e0fc3f833781f0e22a8c408cc47219f0d3893f10469b20", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a1ac5529a85ff5e5b3e0fc3f833781f0e22a8c408cc47219f0d3893f10469b20", kill_on_drop: false }`
[INFO] [stdout] a1ac5529a85ff5e5b3e0fc3f833781f0e22a8c408cc47219f0d3893f10469b20
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-16/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-16/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:a429bb59b7a3b4e7270a4b4c243bb115fc561d8f62ec34ef63a0a36cabf65dfd" "/opt/rustwide/cargo-home/bin/cargo" "+404c8471aba60c2d837fa728e7c729a0f52d5830" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] bfe96f02d38d4ac9bb9185d87ed0045ef1d5ea78e5e96a63282305374f84a76b
[INFO] running `Command { std: "docker" "start" "-a" "bfe96f02d38d4ac9bb9185d87ed0045ef1d5ea78e5e96a63282305374f84a76b", kill_on_drop: false }`
[INFO] [stderr]    Compiling autocfg v1.0.1
[INFO] [stderr]    Compiling libc v0.2.98
[INFO] [stderr]    Compiling cfg-if v1.0.0
[INFO] [stderr]    Compiling proc-macro2 v1.0.28
[INFO] [stderr]    Compiling unicode-xid v0.2.2
[INFO] [stderr]    Compiling syn v1.0.74
[INFO] [stderr]    Compiling lazy_static v1.4.0
[INFO] [stderr]    Compiling bitflags v1.2.1
[INFO] [stderr]    Compiling version_check v0.9.3
[INFO] [stderr]    Compiling crossbeam-utils v0.8.5
[INFO] [stderr]    Compiling bytemuck v1.7.2
[INFO] [stderr]    Compiling log v0.4.14
[INFO] [stderr]    Compiling crc32fast v1.2.1
[INFO] [stderr]    Compiling crossbeam-epoch v0.9.5
[INFO] [stderr]    Compiling memchr v2.4.0
[INFO] [stderr]    Compiling adler32 v1.2.0
[INFO] [stderr]    Compiling unicode-general-category v0.2.0
[INFO] [stderr]    Compiling scopeguard v1.1.0
[INFO] [stderr]    Compiling rayon-core v1.9.1
[INFO] [stderr]    Compiling serde_derive v1.0.127
[INFO] [stderr]    Compiling float-cmp v0.5.3
[INFO] [stderr]    Compiling arrayvec v0.5.2
[INFO] [stderr]    Compiling byteorder v1.4.3
[INFO] [stderr]    Compiling matches v0.1.8
[INFO] [stderr]    Compiling adler v1.0.2
[INFO] [stderr]    Compiling serde v1.0.127
[INFO] [stderr]    Compiling smallvec v1.6.1
[INFO] [stderr]    Compiling ttf-parser v0.12.3
[INFO] [stderr]    Compiling siphasher v0.2.3
[INFO] [stderr]    Compiling unicode-script v0.5.3
[INFO] [stderr]    Compiling xmlparser v0.13.3
[INFO] [stderr]    Compiling unicode-bidi-mirroring v0.1.0
[INFO] [stderr]    Compiling unicode-segmentation v1.8.0
[INFO] [stderr]    Compiling unicode-width v0.1.8
[INFO] [stderr]    Compiling regex-syntax v0.6.25
[INFO] [stderr]    Compiling unicode-ccc v0.1.2
[INFO] [stderr]    Compiling ttf-parser v0.9.0
[INFO] [stderr]    Compiling strsim v0.8.0
[INFO] [stderr]    Compiling base64 v0.13.0
[INFO] [stderr]    Compiling pico-args v0.4.2
[INFO] [stderr]    Compiling rctree v0.3.3
[INFO] [stderr]    Compiling linked-hash-map v0.5.4
[INFO] [stderr]    Compiling vec_map v0.8.2
[INFO] [stderr]    Compiling ansi_term v0.11.0
[INFO] [stderr]    Compiling unicode-vo v0.1.0
[INFO] [stderr]    Compiling either v1.6.1
[INFO] [stderr]    Compiling arrayref v0.3.6
[INFO] [stderr]    Compiling xmlwriter v0.1.0
[INFO] [stderr]    Compiling glob v0.3.0
[INFO] [stderr]    Compiling yansi v0.5.0
[INFO] [stderr]    Compiling dtoa v0.4.8
[INFO] [stderr]    Compiling number_prefix v0.4.0
[INFO] [stderr]    Compiling jpeg-decoder v0.1.22
[INFO] [stderr]    Compiling miniz_oxide v0.3.7
[INFO] [stderr]    Compiling unicode-bidi v0.3.5
[INFO] [stderr]    Compiling data-url v0.1.0
[INFO] [stderr]    Compiling rgb v0.8.27
[INFO] [stderr]    Compiling safe_arch v0.5.2
[INFO] [stderr]    Compiling textwrap v0.11.0
[INFO] [stderr]    Compiling svgtypes v0.5.0
[INFO] [stderr]    Compiling roxmltree v0.14.1
[INFO] [stderr]    Compiling svgfilters v0.3.0
[INFO] [stderr]    Compiling kurbo v0.8.0
[INFO] [stderr]    Compiling proc-macro-error-attr v1.0.4
[INFO] [stderr]    Compiling proc-macro-error v1.0.4
[INFO] [stderr]    Compiling heck v0.3.3
[INFO] [stderr]    Compiling memoffset v0.6.4
[INFO] [stderr]    Compiling miniz_oxide v0.4.4
[INFO] [stderr]    Compiling num-traits v0.2.14
[INFO] [stderr]    Compiling num-integer v0.1.44
[INFO] [stderr]    Compiling rayon v1.5.1
[INFO] [stderr]    Compiling crossbeam-channel v0.5.1
[INFO] [stderr]    Compiling yaml-rust v0.4.5
[INFO] [stderr]    Compiling deflate v0.8.6
[INFO] [stderr]    Compiling quote v1.0.9
[INFO] [stderr]    Compiling simplecss v0.2.1
[INFO] [stderr]    Compiling aho-corasick v0.7.18
[INFO] [stderr]    Compiling num_cpus v1.13.0
[INFO] [stderr]    Compiling atty v0.2.14
[INFO] [stderr]    Compiling memmap2 v0.2.3
[INFO] [stderr]    Compiling time v0.1.44
[INFO] [stderr]    Compiling terminal_size v0.1.17
[INFO] [stderr]    Compiling fontdb v0.5.4
[INFO] [stderr]    Compiling console v0.14.1
[INFO] [stderr]    Compiling clap v2.33.3
[INFO] [stderr]    Compiling flate2 v1.0.20
[INFO] [stderr]    Compiling png v0.16.8
[INFO] [stderr]    Compiling crossbeam-deque v0.8.1
[INFO] [stderr]    Compiling regex v1.5.4
[INFO] [stderr]    Compiling chrono v0.4.19
[INFO] [stderr]    Compiling rustybuzz v0.3.0
[INFO] [stderr]    Compiling tiny-skia v0.5.1
[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-1.0.74/src/lib.rs --error-format=json --json=diagnostic-rendered-ansi,artifacts,future-incompat --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="full"' --cfg 'feature="parsing"' --cfg 'feature="printing"' --cfg 'feature="proc-macro"' --cfg 'feature="quote"' -C metadata=4b41992d6c952517 -C extra-filename=-4b41992d6c952517 --out-dir /opt/rustwide/target/debug/deps -L dependency=/opt/rustwide/target/debug/deps --extern proc_macro2=/opt/rustwide/target/debug/deps/libproc_macro2-2b187afb25f696e1.rmeta --extern quote=/opt/rustwide/target/debug/deps/libquote-1b89975272fbbc51.rmeta --extern unicode_xid=/opt/rustwide/target/debug/deps/libunicode_xid-3c8a88541efd8c80.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" "bfe96f02d38d4ac9bb9185d87ed0045ef1d5ea78e5e96a63282305374f84a76b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "bfe96f02d38d4ac9bb9185d87ed0045ef1d5ea78e5e96a63282305374f84a76b", kill_on_drop: false }`
[INFO] [stdout] bfe96f02d38d4ac9bb9185d87ed0045ef1d5ea78e5e96a63282305374f84a76b