[INFO] cloning repository https://github.com/mishan88/rust-howdoi
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/mishan88/rust-howdoi" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmishan88%2Frust-howdoi", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmishan88%2Frust-howdoi'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] f137a9f016d1c4f48f30d3ef3b5d0978fe47a74a
[INFO] testing mishan88/rust-howdoi against 1.55.0 for beta-1.56-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmishan88%2Frust-howdoi" "/workspace/builds/worker-64/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-64/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/mishan88/rust-howdoi on toolchain 1.55.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.55.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/mishan88/rust-howdoi
[INFO] finished tweaking git repo https://github.com/mishan88/rust-howdoi
[INFO] tweaked toml for git repo https://github.com/mishan88/rust-howdoi written to /workspace/builds/worker-64/source/Cargo.toml
[INFO] crate git repo https://github.com/mishan88/rust-howdoi already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.55.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded mac v0.1.1
[INFO] [stderr]   Downloaded unicase v2.3.0
[INFO] [stderr]   Downloaded MacTypes-sys v2.1.0
[INFO] [stderr]   Downloaded openssl v0.10.20
[INFO] [stderr]   Downloaded openssl-sys v0.9.43
[INFO] [stderr]   Downloaded http v0.1.16
[INFO] [stderr]   Downloaded regex v1.1.2
[INFO] [stderr]   Downloaded cssparser-macros v0.3.5
[INFO] [stderr]   Downloaded precomputed-hash v0.1.1
[INFO] [stderr]   Downloaded cssparser v0.24.1
[INFO] [stderr]   Downloaded serde v1.0.89
[INFO] [stderr]   Downloaded serde_derive v1.0.89
[INFO] [stderr]   Downloaded selectors v0.20.0
[INFO] [stderr]   Downloaded procedural-masquerade v0.1.6
[INFO] [stderr]   Downloaded cfg-if v0.1.7
[INFO] [stderr]   Downloaded thin-slice v0.1.1
[INFO] [stderr]   Downloaded servo_arc v0.1.1
[INFO] [stderr]   Downloaded hyper v0.12.25
[INFO] [stderr]   Downloaded futf v0.1.4
[INFO] [stderr]   Downloaded markup5ever v0.7.5
[INFO] [stderr]   Downloaded tendril v0.4.1
[INFO] [stderr]   Downloaded new_debug_unreachable v1.0.3
[INFO] [stderr]   Downloaded h2 v0.1.17
[INFO] [stderr]   Downloaded html5ever v0.22.5
[INFO] [stderr]   Downloaded tokio-sync v0.1.4
[INFO] [stderr]   Downloaded security-framework-sys v0.2.3
[INFO] [stderr]   Downloaded tokio v0.1.18
[INFO] [stderr]   Downloaded cc v1.0.31
[INFO] [stderr]   Downloaded security-framework v0.2.2
[INFO] [stderr]   Downloaded dtoa-short v0.3.2
[INFO] [stderr]   Downloaded string_cache_codegen v0.4.2
[INFO] [stderr]   Downloaded tokio-threadpool v0.1.13
[INFO] [stderr]   Downloaded ego-tree v0.6.0
[INFO] [stderr]   Downloaded string_cache v0.7.3
[INFO] [stderr]   Downloaded uuid v0.7.3
[INFO] [stderr]   Downloaded reqwest v0.9.12
[INFO] [stderr]   Downloaded scraper v0.9.2
[INFO] [stderr]   Downloaded string_cache_shared v0.3.0
[INFO] [stderr]   Downloaded libc v0.2.50
[INFO] [stderr]   Downloaded syn v0.15.29
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-64/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-64/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:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+1.55.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 5c4ba53b16f59b7a558dd51ebae90ca284ec0cdbed69c520e7be0b4c5d929f7c
[INFO] running `Command { std: "docker" "start" "-a" "5c4ba53b16f59b7a558dd51ebae90ca284ec0cdbed69c520e7be0b4c5d929f7c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "5c4ba53b16f59b7a558dd51ebae90ca284ec0cdbed69c520e7be0b4c5d929f7c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "5c4ba53b16f59b7a558dd51ebae90ca284ec0cdbed69c520e7be0b4c5d929f7c", kill_on_drop: false }`
[INFO] [stdout] 5c4ba53b16f59b7a558dd51ebae90ca284ec0cdbed69c520e7be0b4c5d929f7c
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-64/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-64/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=warn" "-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:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+1.55.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 7ae34801e501f8b0645be55125acdd16eeffe4b38d4a5098028bd5991930868e
[INFO] running `Command { std: "docker" "start" "-a" "7ae34801e501f8b0645be55125acdd16eeffe4b38d4a5098028bd5991930868e", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.50
[INFO] [stderr]    Compiling rand_core v0.4.0
[INFO] [stderr]    Compiling autocfg v0.1.2
[INFO] [stderr]    Compiling version_check v0.1.5
[INFO] [stderr]    Compiling cfg-if v0.1.7
[INFO] [stderr]    Compiling siphasher v0.2.3
[INFO] [stderr]    Compiling semver-parser v0.7.0
[INFO] [stderr]    Compiling futures v0.1.25
[INFO] [stderr]    Compiling smallvec v0.6.9
[INFO] [stderr]    Compiling itoa v0.4.3
[INFO] [stderr]    Compiling syn v0.15.29
[INFO] [stderr]    Compiling cc v1.0.31
[INFO] [stderr]    Compiling stable_deref_trait v1.1.1
[INFO] [stderr]    Compiling nodrop v0.1.13
[INFO] [stderr]    Compiling serde v1.0.89
[INFO] [stderr]    Compiling slab v0.4.2
[INFO] [stderr]    Compiling ryu v0.2.7
[INFO] [stderr]    Compiling pkg-config v0.3.14
[INFO] [stderr]    Compiling fnv v1.0.6
[INFO] [stderr]    Compiling string_cache_shared v0.3.0
[INFO] [stderr]    Compiling lazycell v1.2.1
[INFO] [stderr]    Compiling build_const v0.2.1
[INFO] [stderr]    Compiling dtoa v0.4.3
[INFO] [stderr]    Compiling new_debug_unreachable v1.0.3
[INFO] [stderr]    Compiling mac v0.1.1
[INFO] [stderr]    Compiling foreign-types-shared v0.1.1
[INFO] [stderr]    Compiling httparse v1.3.3
[INFO] [stderr]    Compiling precomputed-hash v0.1.1
[INFO] [stderr]    Compiling openssl v0.10.20
[INFO] [stderr]    Compiling string v0.1.3
[INFO] [stderr]    Compiling memchr v2.2.0
[INFO] [stderr]    Compiling utf-8 v0.7.5
[INFO] [stderr]    Compiling native-tls v0.2.2
[INFO] [stderr]    Compiling indexmap v1.0.2
[INFO] [stderr]    Compiling crc32fast v1.2.0
[INFO] [stderr]    Compiling try-lock v0.2.2
[INFO] [stderr]    Compiling procedural-masquerade v0.1.6
[INFO] [stderr]    Compiling openssl-probe v0.1.2
[INFO] [stderr]    Compiling encoding_rs v0.8.17
[INFO] [stderr]    Compiling percent-encoding v1.0.1
[INFO] [stderr]    Compiling regex v1.1.2
[INFO] [stderr]    Compiling thin-slice v0.1.1
[INFO] [stderr]    Compiling ucd-util v0.1.3
[INFO] [stderr]    Compiling utf8-ranges v1.0.2
[INFO] [stderr]    Compiling ego-tree v0.6.0
[INFO] [stderr]    Compiling termcolor v1.0.4
[INFO] [stderr]    Compiling tokio-trace-core v0.1.0
[INFO] [stderr]    Compiling unicode-bidi v0.3.4
[INFO] [stderr]    Compiling miniz_oxide v0.2.1
[INFO] [stderr]    Compiling thread_local v0.3.6
[INFO] [stderr]    Compiling getopts v0.2.18
[INFO] [stderr]    Compiling fxhash v0.2.1
[INFO] [stderr]    Compiling base64 v0.10.1
[INFO] [stderr]    Compiling syn v0.14.9
[INFO] [stderr]    Compiling rand_core v0.3.1
[INFO] [stderr]    Compiling rand_jitter v0.1.3
[INFO] [stderr]    Compiling foreign-types v0.3.2
[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-0.14.9/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="fold"' --cfg 'feature="full"' --cfg 'feature="parsing"' --cfg 'feature="printing"' --cfg 'feature="proc-macro"' --cfg 'feature="quote"' -C metadata=e43b60152a5ccdef -C extra-filename=-e43b60152a5ccdef --out-dir /opt/rustwide/target/debug/deps -L dependency=/opt/rustwide/target/debug/deps --extern proc_macro2=/opt/rustwide/target/debug/deps/libproc_macro2-baee35fcf6990606.rmeta --extern quote=/opt/rustwide/target/debug/deps/libquote-7fede1f35392dd7a.rmeta --extern unicode_xid=/opt/rustwide/target/debug/deps/libunicode_xid-2f6444d33d391550.rmeta --cap-lints allow --cap-lints=warn` (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" "7ae34801e501f8b0645be55125acdd16eeffe4b38d4a5098028bd5991930868e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "7ae34801e501f8b0645be55125acdd16eeffe4b38d4a5098028bd5991930868e", kill_on_drop: false }`
[INFO] [stdout] 7ae34801e501f8b0645be55125acdd16eeffe4b38d4a5098028bd5991930868e