[INFO] cloning repository https://github.com/w4/dobble
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/w4/dobble" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fw4%2Fdobble", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fw4%2Fdobble'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 69fb931f69377408b944b277d438fc21d59aa89e
[INFO] checking w4/dobble against master#7702ae16a23407cdd909ff9174294563ae1f4ba3 for pr-97183
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fw4%2Fdobble" "/workspace/builds/worker-0/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-0/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/w4/dobble on toolchain 7702ae16a23407cdd909ff9174294563ae1f4ba3
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+7702ae16a23407cdd909ff9174294563ae1f4ba3" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/w4/dobble
[INFO] finished tweaking git repo https://github.com/w4/dobble
[INFO] tweaked toml for git repo https://github.com/w4/dobble written to /workspace/builds/worker-0/source/Cargo.toml
[INFO] crate git repo https://github.com/w4/dobble already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+7702ae16a23407cdd909ff9174294563ae1f4ba3" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded syn v1.0.33
[INFO] [stderr]   Downloaded tokio-buf v0.1.1
[INFO] [stderr]   Downloaded want v0.2.0
[INFO] [stderr]   Downloaded backtrace v0.3.41
[INFO] [stderr]   Downloaded cc v1.0.56
[INFO] [stderr]   Downloaded dtoa v0.4.6
[INFO] [stderr]   Downloaded webpki-roots v0.19.0
[INFO] [stderr]   Downloaded js-sys v0.3.41
[INFO] [stderr]   Downloaded bytes v0.5.5
[INFO] [stderr]   Downloaded tokio v0.2.21
[INFO] [stderr]   Downloaded error-chain v0.11.0
[INFO] [stderr]   Downloaded derive_is_enum_variant v0.1.1
[INFO] [stderr]   Downloaded rust-argon2 v0.7.0
[INFO] [stderr]   Downloaded dirs-sys v0.3.5
[INFO] [stderr]   Downloaded blake2b_simd v0.5.10
[INFO] [stderr]   Downloaded dirs v3.0.0
[INFO] [stderr]   Downloaded serde_derive v1.0.114
[INFO] [stderr]   Downloaded arrayvec v0.5.1
[INFO] [stderr]   Downloaded darling_core v0.5.0
[INFO] [stderr]   Downloaded darling_macro v0.5.0
[INFO] [stderr]   Downloaded security-framework v0.4.4
[INFO] [stderr]   Downloaded pin-project-internal v0.4.22
[INFO] [stderr]   Downloaded http-body v0.1.0
[INFO] [stderr]   Downloaded hermit-abi v0.1.14
[INFO] [stderr]   Downloaded synstructure v0.12.4
[INFO] [stderr]   Downloaded hyper v0.12.35
[INFO] [stderr]   Downloaded rustls v0.17.0
[INFO] [stderr]   Downloaded anyhow v1.0.31
[INFO] [stderr]   Downloaded security-framework-sys v0.4.3
[INFO] [stderr]   Downloaded flate2 v1.0.16
[INFO] [stderr]   Downloaded publicsuffix v1.5.4
[INFO] [stderr]   Downloaded try_from v0.3.2
[INFO] [stderr]   Downloaded native-tls v0.2.4
[INFO] [stderr]   Downloaded pkg-config v0.3.17
[INFO] [stderr]   Downloaded darling v0.5.0
[INFO] [stderr]   Downloaded thiserror v1.0.20
[INFO] [stderr]   Downloaded syn v0.12.15
[INFO] [stderr]   Downloaded enum-kinds v0.4.1
[INFO] [stderr]   Downloaded from_variants_impl v0.4.0
[INFO] [stderr]   Downloaded from_variants v0.4.0
[INFO] [stderr]   Downloaded loom v0.3.4
[INFO] [stderr]   Downloaded wasm-bindgen v0.2.64
[INFO] [stderr]   Downloaded wasm-bindgen-macro v0.2.64
[INFO] [stderr]   Downloaded reqwest v0.10.6
[INFO] [stderr]   Downloaded scoped-tls v0.1.2
[INFO] [stderr]   Downloaded generator v0.6.21
[INFO] [stderr]   Downloaded hyper v0.13.6
[INFO] [stderr]   Downloaded h2 v0.2.5
[INFO] [stderr]   Downloaded redox_users v0.3.4
[INFO] [stderr]   Downloaded tinyvec v0.3.3
[INFO] [stderr]   Downloaded reqwest v0.9.24
[INFO] [stderr]   Downloaded unicode-normalization v0.1.13
[INFO] [stderr]   Downloaded tokio-rustls v0.13.1
[INFO] [stderr]   Downloaded serde_json v1.0.56
[INFO] [stderr]   Downloaded dbus v0.8.4
[INFO] [stderr]   Downloaded wasm-bindgen-shared v0.2.64
[INFO] [stderr]   Downloaded cookie v0.12.0
[INFO] [stderr]   Downloaded md5 v0.6.1
[INFO] [stderr]   Downloaded hyper-rustls v0.20.0
[INFO] [stderr]   Downloaded pin-project v0.4.22
[INFO] [stderr]   Downloaded hyper-tls v0.3.2
[INFO] [stderr]   Downloaded adler v0.2.2
[INFO] [stderr]   Downloaded cookie_store v0.7.0
[INFO] [stderr]   Downloaded miniz_oxide v0.4.0
[INFO] [stderr]   Downloaded wasm-bindgen-macro-support v0.2.64
[INFO] [stderr]   Downloaded serde v1.0.114
[INFO] [stderr]   Downloaded wrapped-vec v0.2.1
[INFO] [stderr]   Downloaded thiserror-impl v1.0.20
[INFO] [stderr]   Downloaded rustfm-scrobble v1.0.0
[INFO] [stderr]   Downloaded mpris v2.0.0-rc2
[INFO] [stderr]   Downloaded web-sys v0.3.41
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[INFO] [stderr]   Downloaded pin-project-lite v0.1.7
[INFO] [stderr]   Downloaded encoding_rs v0.8.23
[INFO] [stderr]   Downloaded wasm-bindgen-backend v0.2.64
[INFO] [stderr]   Downloaded ring v0.16.15
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/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:ac0d0aa6ec8ed129e241004a6179c99fa0d2616f50ba759c5b60bd26d0fafa02" "/opt/rustwide/cargo-home/bin/cargo" "+7702ae16a23407cdd909ff9174294563ae1f4ba3" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] be40a8633175c55bc4bfabab4526909217da0ac274c818ea3289b596a00967c9
[INFO] running `Command { std: "docker" "start" "-a" "be40a8633175c55bc4bfabab4526909217da0ac274c818ea3289b596a00967c9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "be40a8633175c55bc4bfabab4526909217da0ac274c818ea3289b596a00967c9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "be40a8633175c55bc4bfabab4526909217da0ac274c818ea3289b596a00967c9", kill_on_drop: false }`
[INFO] [stdout] be40a8633175c55bc4bfabab4526909217da0ac274c818ea3289b596a00967c9
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/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:ac0d0aa6ec8ed129e241004a6179c99fa0d2616f50ba759c5b60bd26d0fafa02" "/opt/rustwide/cargo-home/bin/cargo" "+7702ae16a23407cdd909ff9174294563ae1f4ba3" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 4e0f89bed4b5bde872efdd9cacab6f532bda634b725f7ee84a97615175b398d4
[INFO] running `Command { std: "docker" "start" "-a" "4e0f89bed4b5bde872efdd9cacab6f532bda634b725f7ee84a97615175b398d4", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.71
[INFO] [stderr]     Checking cfg-if v0.1.9
[INFO] [stderr]    Compiling autocfg v1.0.0
[INFO] [stderr]    Compiling cc v1.0.56
[INFO] [stderr]     Checking lazy_static v1.4.0
[INFO] [stderr]    Compiling proc-macro2 v1.0.18
[INFO] [stderr]    Compiling log v0.4.8
[INFO] [stderr]    Compiling unicode-xid v0.2.1
[INFO] [stderr]    Compiling syn v1.0.33
[INFO] [stderr]     Checking fnv v1.0.7
[INFO] [stderr]     Checking slab v0.4.2
[INFO] [stderr]     Checking itoa v0.4.6
[INFO] [stderr]    Compiling pkg-config v0.3.17
[INFO] [stderr]     Checking futures v0.1.29
[INFO] [stderr]    Compiling byteorder v1.3.4
[INFO] [stderr]    Compiling semver-parser v0.7.0
[INFO] [stderr]    Compiling maybe-uninit v2.0.0
[INFO] [stderr]    Compiling version_check v0.9.2
[INFO] [stderr]     Checking either v1.5.3
[INFO] [stderr]     Checking tinyvec v0.3.3
[INFO] [stderr]     Checking matches v0.1.8
[INFO] [stderr]    Compiling unicode-xid v0.1.0
[INFO] [stderr]     Checking once_cell v1.4.0
[INFO] [stderr]     Checking scopeguard v1.1.0
[INFO] [stderr]    Compiling memchr v2.3.3
[INFO] [stderr]    Compiling autocfg v0.1.7
[INFO] [stderr]     Checking rand_core v0.4.2
[INFO] [stderr]     Checking bytes v0.5.5
[INFO] [stderr]     Checking futures-core v0.3.5
[INFO] [stderr]    Compiling serde_derive v1.0.114
[INFO] [stderr]     Checking try-lock v0.2.2
[INFO] [stderr]    Compiling httparse v1.3.4
[INFO] [stderr]    Compiling bitflags v1.2.1
[INFO] [stderr]    Compiling pin-project-internal v0.4.22
[INFO] [stderr]    Compiling serde v1.0.114
[INFO] [stderr]    Compiling openssl v0.10.30
[INFO] [stderr]     Checking foreign-types-shared v0.1.1
[INFO] [stderr]     Checking pin-project-lite v0.1.7
[INFO] [stderr]    Compiling native-tls v0.2.4
[INFO] [stderr]    Compiling proc-macro-nested v0.1.6
[INFO] [stderr]     Checking untrusted v0.7.1
[INFO] [stderr]     Checking spin v0.5.2
[INFO] [stderr]    Compiling failure_derive v0.1.8
[INFO] [stderr]     Checking openssl-probe v0.1.2
[INFO] [stderr]    Compiling ryu v1.0.5
[INFO] [stderr]    Compiling proc-macro-hack v0.5.16
[INFO] [stderr]     Checking percent-encoding v2.1.0
[INFO] [stderr]     Checking futures-sink v0.3.5
[INFO] [stderr]    Compiling serde_json v1.0.56
[INFO] [stderr]     Checking futures-io v0.3.5
[INFO] [stderr]     Checking rustc-demangle v0.1.16
[INFO] [stderr]    Compiling unicode-xid v0.0.4
[INFO] [stderr]    Compiling ident_case v1.0.1
[INFO] [stderr]     Checking pin-utils v0.1.0
[INFO] [stderr]     Checking percent-encoding v1.0.1
[INFO] [stderr]    Compiling crc32fast v1.2.0
[INFO] [stderr]     Checking dtoa v0.4.6
[INFO] [stderr]    Compiling quote v0.3.15
[INFO] [stderr]     Checking regex-syntax v0.6.18
[INFO] [stderr]    Compiling encoding_rs v0.8.23
[INFO] [stderr]     Checking adler v0.2.2
[INFO] [stderr]     Checking base64 v0.11.0
[INFO] [stderr]     Checking mime v0.3.16
[INFO] [stderr]     Checking tower-service v0.3.0
[INFO] [stderr]    Compiling error-chain v0.11.0
[INFO] [stderr]    Compiling unicode-segmentation v1.6.0
[INFO] [stderr]    Compiling anyhow v1.0.31
[INFO] [stderr]     Checking base64 v0.12.3
[INFO] [stderr]     Checking md5 v0.6.1
[INFO] [stderr]     Checking try_from v0.3.2
[INFO] [stderr]    Compiling semver v0.9.0
[INFO] [stderr]     Checking unicode-bidi v0.3.4
[INFO] [stderr]    Compiling proc-macro2 v0.3.8
[INFO] [stderr]    Compiling proc-macro2 v0.2.3
[INFO] [stderr]     Checking lock_api v0.3.4
[INFO] [stderr]     Checking futures-task v0.3.5
[INFO] [stderr]     Checking rand_core v0.3.1
[INFO] [stderr]     Checking rand_jitter v0.1.4
[INFO] [stderr]     Checking unicode-normalization v0.1.13
[INFO] [stderr]     Checking futures-channel v0.3.5
[INFO] [stderr]     Checking foreign-types v0.3.2
[INFO] [stderr]    Compiling crossbeam-utils v0.7.2
[INFO] [stderr]    Compiling indexmap v1.4.0
[INFO] [stderr]    Compiling memoffset v0.5.4
[INFO] [stderr]    Compiling crossbeam-epoch v0.8.2
[INFO] [stderr]    Compiling unicase v2.6.0
[INFO] [stderr]    Compiling error-chain v0.12.2
[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 http v0.2.1
[INFO] [stderr]    Compiling synom v0.11.3
[INFO] [stderr]    Compiling libdbus-sys v0.2.1
[INFO] [stderr]     Checking miniz_oxide v0.4.0
[INFO] [stderr]    Compiling heck v0.3.1
[INFO] [stderr]    Compiling quote v0.5.2
[INFO] [stderr]     Checking tokio-sync v0.1.8
[INFO] [stderr]    Compiling quote v0.4.2
[INFO] [stderr]    Compiling rustc_version v0.2.3
[INFO] [stderr]     Checking rand_hc v0.1.0
[INFO] [stderr]     Checking rand_xorshift v0.1.1
[INFO] [stderr]     Checking rand_isaac v0.1.1
[INFO] [stderr]    Compiling openssl-sys v0.9.58
[INFO] [stderr]    Compiling ring v0.16.15
[INFO] [stderr]    Compiling backtrace-sys v0.1.37
[INFO] [stderr]     Checking idna v0.2.0
[INFO] [stderr]     Checking idna v0.1.5
[INFO] [stderr]    Compiling syn v0.11.11
[INFO] [stderr]    Compiling syn v0.13.11
[INFO] [stderr]     Checking regex v1.3.9
[INFO] [stderr]     Checking want v0.3.0
[INFO] [stderr]     Checking want v0.2.0
[INFO] [stderr]    Compiling quote v1.0.7
[INFO] [stderr]     Checking http-body v0.3.1
[INFO] [stderr]     Checking iovec v0.1.4
[INFO] [stderr]     Checking num_cpus v1.13.0
[INFO] [stderr]     Checking net2 v0.2.34
[INFO] [stderr]     Checking time v0.1.43
[INFO] [stderr]     Checking rand_os v0.1.3
[INFO] [stderr]     Checking socket2 v0.3.12
[INFO] [stderr]     Checking dirs-sys v0.3.5
[INFO] [stderr]    Compiling syn v0.12.15
[INFO] [stderr]     Checking base64 v0.10.1
[INFO] [stderr]     Checking smallvec v0.6.13
[INFO] [stderr]     Checking flate2 v1.0.16
[INFO] [stderr]     Checking bytes v0.4.12
[INFO] [stderr]     Checking futures-cpupool v0.1.8
[INFO] [stderr]     Checking url v1.7.2
[INFO] [stderr]     Checking dirs v3.0.0
[INFO] [stderr]    Compiling parking_lot_core v0.6.2
[INFO] [stderr]    Compiling parking_lot v0.9.0
[INFO] [stderr]    Compiling hyper v0.12.35
[INFO] [stderr]     Checking mio v0.6.22
[INFO] [stderr]     Checking url v2.1.1
[INFO] [stderr]     Checking tokio-executor v0.1.10
[INFO] [stderr]     Checking crossbeam-queue v0.2.3
[INFO] [stderr]     Checking dbus v0.8.4
[INFO] [stderr]     Checking tokio-io v0.1.13
[INFO] [stderr]     Checking http v0.1.21
[INFO] [stderr]     Checking string v0.2.1
[INFO] [stderr]     Checking tokio-buf v0.1.1
[INFO] [stderr]     Checking tokio-current-thread v0.1.7
[INFO] [stderr]     Checking tokio-timer v0.2.13
[INFO] [stderr]     Checking crossbeam-deque v0.7.3
[INFO] [stderr]     Checking cookie v0.12.0
[INFO] [stderr]     Checking publicsuffix v1.5.4
[INFO] [stderr]     Checking tokio v0.2.21
[INFO] [stderr]     Checking tokio-threadpool v0.1.18
[INFO] [stderr]     Checking uuid v0.7.4
[INFO] [stderr]    Compiling mime_guess v2.0.3
[INFO] [stderr]     Checking h2 v0.1.26
[INFO] [stderr]     Checking http-body v0.1.0
[INFO] [stderr]    Compiling derive_is_enum_variant v0.1.1
[INFO] [stderr]    Compiling wrapped-vec v0.2.1
[INFO] [stderr]     Checking tokio-reactor v0.1.12
[INFO] [stderr]    Compiling darling_core v0.5.0
[INFO] [stderr]     Checking tokio-tcp v0.1.4
[INFO] [stderr]     Checking tokio v0.1.22
[INFO] [stderr]     Checking backtrace v0.3.41
[INFO] [stderr] error: could not compile `syn`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustc --crate-name syn /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/syn-0.13.11/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="extra-traits"' --cfg 'feature="full"' --cfg 'feature="parsing"' --cfg 'feature="printing"' --cfg 'feature="proc-macro"' --cfg 'feature="quote"' -C metadata=34b122fba25c2a0e -C extra-filename=-34b122fba25c2a0e --out-dir /opt/rustwide/target/debug/deps -L dependency=/opt/rustwide/target/debug/deps --extern proc_macro2=/opt/rustwide/target/debug/deps/libproc_macro2-dba098860f0da8d6.rmeta --extern quote=/opt/rustwide/target/debug/deps/libquote-659df0aa6f22a639.rmeta --extern unicode_xid=/opt/rustwide/target/debug/deps/libunicode_xid-17df5e5ca0bb5bda.rmeta --cap-lints allow --cap-lints=forbid` (signal: 9, SIGKILL: kill)
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] running `Command { std: "docker" "inspect" "4e0f89bed4b5bde872efdd9cacab6f532bda634b725f7ee84a97615175b398d4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "4e0f89bed4b5bde872efdd9cacab6f532bda634b725f7ee84a97615175b398d4", kill_on_drop: false }`
[INFO] [stdout] 4e0f89bed4b5bde872efdd9cacab6f532bda634b725f7ee84a97615175b398d4