[INFO] cloning repository https://github.com/fragrans/ice_2020
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/fragrans/ice_2020" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ffragrans%2Fice_2020", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ffragrans%2Fice_2020'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 15133c3ececa0091dcf8107068532439adfafbe4
[INFO] checking fragrans/ice_2020 against master#b7ebc6b0c1ba3c27ebb17c0b496ece778ef11e18 for pr-79470
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ffragrans%2Fice_2020" "/workspace/builds/worker-9/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-9/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/fragrans/ice_2020 on toolchain b7ebc6b0c1ba3c27ebb17c0b496ece778ef11e18
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+b7ebc6b0c1ba3c27ebb17c0b496ece778ef11e18" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/fragrans/ice_2020
[INFO] finished tweaking git repo https://github.com/fragrans/ice_2020
[INFO] tweaked toml for git repo https://github.com/fragrans/ice_2020 written to /workspace/builds/worker-9/source/Cargo.toml
[INFO] crate git repo https://github.com/fragrans/ice_2020 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+b7ebc6b0c1ba3c27ebb17c0b496ece778ef11e18" "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-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" "rustops/crates-build-env@sha256:c8ac004eab7d63a0ad09a2dde3d3353ba464f767bee4de425dc8f74c46a1905e" "/opt/rustwide/cargo-home/bin/cargo" "+b7ebc6b0c1ba3c27ebb17c0b496ece778ef11e18" "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] e65083cab33c4b2d88179794a5b1d236efa0441e3cb7f337ad4f1862f3baee32
[INFO] running `Command { std: "docker" "start" "-a" "e65083cab33c4b2d88179794a5b1d236efa0441e3cb7f337ad4f1862f3baee32", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "e65083cab33c4b2d88179794a5b1d236efa0441e3cb7f337ad4f1862f3baee32", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e65083cab33c4b2d88179794a5b1d236efa0441e3cb7f337ad4f1862f3baee32", kill_on_drop: false }`
[INFO] [stdout] e65083cab33c4b2d88179794a5b1d236efa0441e3cb7f337ad4f1862f3baee32
[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" "rustops/crates-build-env@sha256:c8ac004eab7d63a0ad09a2dde3d3353ba464f767bee4de425dc8f74c46a1905e" "/opt/rustwide/cargo-home/bin/cargo" "+b7ebc6b0c1ba3c27ebb17c0b496ece778ef11e18" "check" "--frozen" "--all" "--all-targets" "--message-format=json", 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] d8ad60d92ae920f7456d0ccf40991ebba10b2e71d22e4cf42e6288ff610b1eff
[INFO] running `Command { std: "docker" "start" "-a" "d8ad60d92ae920f7456d0ccf40991ebba10b2e71d22e4cf42e6288ff610b1eff", kill_on_drop: false }`
[INFO] [stderr]    Compiling version_check v0.1.5
[INFO] [stderr]    Compiling syn v1.0.31
[INFO] [stderr]    Compiling proc-macro2 v0.4.30
[INFO] [stderr]     Checking futures-io v0.3.5
[INFO] [stderr]    Compiling syn v0.15.44
[INFO] [stderr]    Compiling glob v0.3.0
[INFO] [stderr]    Compiling httparse v1.3.4
[INFO] [stderr]    Compiling yansi v0.4.0
[INFO] [stderr]    Compiling subtle v2.2.3
[INFO] [stderr]    Compiling matches v0.1.8
[INFO] [stderr]    Compiling unicode-width v0.1.7
[INFO] [stderr]    Compiling smallvec v1.4.0
[INFO] [stderr]     Checking opaque-debug v0.2.3
[INFO] [stderr]    Compiling subtle v1.0.0
[INFO] [stderr]    Compiling quick-error v1.2.3
[INFO] [stderr]    Compiling termcolor v1.1.0
[INFO] [stderr]    Compiling vec_map v0.8.2
[INFO] [stderr]    Compiling gio v0.8.1
[INFO] [stderr]    Compiling version_check v0.9.2
[INFO] [stderr]    Compiling yansi v0.5.0
[INFO] [stderr]     Checking byte-tools v0.3.1
[INFO] [stderr]    Compiling bindgen v0.52.0
[INFO] [stderr]    Compiling ansi_term v0.11.0
[INFO] [stderr]    Compiling ppv-lite86 v0.2.8
[INFO] [stderr]    Compiling strsim v0.8.0
[INFO] [stderr]    Compiling cairo-rs v0.8.1
[INFO] [stderr]    Compiling shlex v0.1.1
[INFO] [stderr]    Compiling rustc-hash v1.1.0
[INFO] [stderr]    Compiling safemem v0.3.3
[INFO] [stderr]    Compiling pango v0.8.0
[INFO] [stderr]    Compiling serde v1.0.111
[INFO] [stderr]    Compiling percent-encoding v1.0.1
[INFO] [stderr]    Compiling lazycell v1.2.1
[INFO] [stderr]    Compiling zeroize v1.1.0
[INFO] [stderr]    Compiling peeking_take_while v0.1.2
[INFO] [stderr]    Compiling gdk-pixbuf v0.8.0
[INFO] [stderr]    Compiling base64 v0.12.1
[INFO] [stderr]    Compiling traitobject v0.1.0
[INFO] [stderr]    Compiling language-tags v0.2.2
[INFO] [stderr]    Compiling gdk v0.12.1
[INFO] [stderr]    Compiling percent-encoding v2.1.0
[INFO] [stderr]     Checking fake-simd v0.1.2
[INFO] [stderr]    Compiling typeable v0.1.2
[INFO] [stderr]    Compiling atk v0.8.0
[INFO] [stderr]    Compiling state v0.4.1
[INFO] [stderr]    Compiling gtk v0.8.1
[INFO] [stderr]     Checking unicode-xid v0.1.0
[INFO] [stderr]    Compiling maud_htmlescape v0.17.0
[INFO] [stderr]    Compiling anyhow v1.0.31
[INFO] [stderr]     Checking fallible-streaming-iterator v0.1.9
[INFO] [stderr]     Checking fallible-iterator v0.2.0
[INFO] [stderr]     Checking open v1.4.0
[INFO] [stderr]    Compiling glib-sys v0.9.1
[INFO] [stderr]    Compiling gobject-sys v0.9.1
[INFO] [stderr]    Compiling gio-sys v0.9.1
[INFO] [stderr]    Compiling cairo-sys-rs v0.9.2
[INFO] [stderr]    Compiling gdk-pixbuf-sys v0.9.1
[INFO] [stderr]    Compiling pango-sys v0.9.1
[INFO] [stderr]    Compiling gdk-sys v0.9.1
[INFO] [stderr]    Compiling atk-sys v0.9.1
[INFO] [stderr]    Compiling indexmap v1.4.0
[INFO] [stderr]    Compiling gtk-sys v0.9.2
[INFO] [stderr]    Compiling num-traits v0.2.11
[INFO] [stderr]    Compiling num-integer v0.1.42
[INFO] [stderr]     Checking futures-task v0.3.5
[INFO] [stderr]    Compiling libloading v0.5.2
[INFO] [stderr]    Compiling libsqlite3-sys v0.18.0
[INFO] [stderr]    Compiling unicode-bidi v0.3.4
[INFO] [stderr]    Compiling humantime v1.3.0
[INFO] [stderr]    Compiling unicode-normalization v0.1.12
[INFO] [stderr]    Compiling textwrap v0.11.0
[INFO] [stderr]     Checking block-padding v0.1.5
[INFO] [stderr]    Compiling rocket_codegen v0.4.5
[INFO] [stderr]    Compiling rocket v0.4.5
[INFO] [stderr]    Compiling unicase v1.4.2
[INFO] [stderr]    Compiling nom v4.2.3
[INFO] [stderr]    Compiling pear_codegen v0.1.2
[INFO] [stderr]     Checking http v0.2.1
[INFO] [stderr]    Compiling clang-sys v0.28.1
[INFO] [stderr]     Checking typenum v1.12.0
[INFO] [stderr]     Checking log v0.4.8
[INFO] [stderr]     Checking getrandom v0.1.14
[INFO] [stderr]     Checking net2 v0.2.34
[INFO] [stderr]     Checking socket2 v0.3.12
[INFO] [stderr]    Compiling atty v0.2.14
[INFO] [stderr]    Compiling which v3.1.1
[INFO] [stderr]    Compiling time v0.1.43
[INFO] [stderr]    Compiling num_cpus v1.13.0
[INFO] [stderr]    Compiling aho-corasick v0.7.10
[INFO] [stderr]    Compiling base64 v0.9.3
[INFO] [stderr]     Checking idna v0.1.5
[INFO] [stderr]    Compiling log v0.3.9
[INFO] [stderr]     Checking dirs v2.0.2
[INFO] [stderr]     Checking want v0.3.0
[INFO] [stderr]     Checking rand_core v0.5.1
[INFO] [stderr]    Compiling clap v2.33.1
[INFO] [stderr]     Checking mio v0.6.22
[INFO] [stderr]    Compiling universal-hash v0.3.0
[INFO] [stderr]    Compiling block-cipher-trait v0.6.2
[INFO] [stderr]    Compiling crypto-mac v0.7.0
[INFO] [stderr]    Compiling aead v0.2.0
[INFO] [stderr]    Compiling quote v0.6.13
[INFO] [stderr]     Checking generic-array v0.12.3
[INFO] [stderr]    Compiling mime v0.2.6
[INFO] [stderr]    Compiling rand_chacha v0.2.2
[INFO] [stderr]     Checking url v1.7.2
[INFO] [stderr]    Compiling polyval v0.3.3
[INFO] [stderr]    Compiling hmac v0.7.1
[INFO] [stderr]    Compiling aes-soft v0.3.3
[INFO] [stderr]    Compiling regex v1.3.9
[INFO] [stderr]     Checking digest v0.8.1
[INFO] [stderr]     Checking block-buffer v0.7.3
[INFO] [stderr]     Checking tokio v0.2.21
[INFO] [stderr]    Compiling rand v0.7.3
[INFO] [stderr]    Compiling hkdf v0.8.0
[INFO] [stderr]    Compiling ghash v0.2.3
[INFO] [stderr]     Checking http-body v0.3.1
[INFO] [stderr]    Compiling aes v0.3.2
[INFO] [stderr]    Compiling cexpr v0.3.6
[INFO] [stderr]     Checking hyper v0.10.16
[INFO] [stderr]     Checking chrono v0.4.11
[INFO] [stderr]     Checking sha2 v0.8.2
[INFO] [stderr]    Compiling aes-gcm v0.5.0
[INFO] [stderr]    Compiling env_logger v0.7.1
[INFO] [stderr]     Checking toml v0.4.10
[INFO] [stderr]     Checking serde_json v1.0.54
[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-1.0.31/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="full"' --cfg 'feature="parsing"' --cfg 'feature="printing"' --cfg 'feature="proc-macro"' --cfg 'feature="quote"' --cfg 'feature="visit"' --cfg 'feature="visit-mut"' -C metadata=a0583a1cd8f10135 -C extra-filename=-a0583a1cd8f10135 --out-dir /opt/rustwide/target/debug/deps -L dependency=/opt/rustwide/target/debug/deps --extern proc_macro2=/opt/rustwide/target/debug/deps/libproc_macro2-878dc37b940f22a1.rmeta --extern quote=/opt/rustwide/target/debug/deps/libquote-818250efdf7e0b59.rmeta --extern unicode_xid=/opt/rustwide/target/debug/deps/libunicode_xid-2c63d0a7aa5a6ce8.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" "d8ad60d92ae920f7456d0ccf40991ebba10b2e71d22e4cf42e6288ff610b1eff", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d8ad60d92ae920f7456d0ccf40991ebba10b2e71d22e4cf42e6288ff610b1eff", kill_on_drop: false }`
[INFO] [stdout] d8ad60d92ae920f7456d0ccf40991ebba10b2e71d22e4cf42e6288ff610b1eff