[INFO] cloning repository https://github.com/tiagonbotelho/referee
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/tiagonbotelho/referee" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ftiagonbotelho%2Freferee", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ftiagonbotelho%2Freferee'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] c9049ebc119a28fa589ef5bd5208afdad23bd2e6
[INFO] checking tiagonbotelho/referee against beta-2021-10-15 for beta-1.56-3
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ftiagonbotelho%2Freferee" "/workspace/builds/worker-58/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-58/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/tiagonbotelho/referee on toolchain beta-2021-10-15
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2021-10-15" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/tiagonbotelho/referee
[INFO] finished tweaking git repo https://github.com/tiagonbotelho/referee
[INFO] tweaked toml for git repo https://github.com/tiagonbotelho/referee written to /workspace/builds/worker-58/source/Cargo.toml
[INFO] crate git repo https://github.com/tiagonbotelho/referee already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2021-10-15" "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] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-58/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-58/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" "+beta-2021-10-15" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] f31f8e0d11ba84fff41e0244c82a278403f95ab918079d5b2171c7aeac8eaeb7
[INFO] running `Command { std: "docker" "start" "-a" "f31f8e0d11ba84fff41e0244c82a278403f95ab918079d5b2171c7aeac8eaeb7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "f31f8e0d11ba84fff41e0244c82a278403f95ab918079d5b2171c7aeac8eaeb7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f31f8e0d11ba84fff41e0244c82a278403f95ab918079d5b2171c7aeac8eaeb7", kill_on_drop: false }`
[INFO] [stdout] f31f8e0d11ba84fff41e0244c82a278403f95ab918079d5b2171c7aeac8eaeb7
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-58/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-58/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" "+beta-2021-10-15" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 8f7b313afdf9e3c34ac0cc20a56067c907ecbedebf2d577b085134a1cdd96462
[INFO] running `Command { std: "docker" "start" "-a" "8f7b313afdf9e3c34ac0cc20a56067c907ecbedebf2d577b085134a1cdd96462", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling libc v0.2.81
[INFO] [stderr]    Compiling log v0.4.11
[INFO] [stderr]    Compiling syn v1.0.54
[INFO] [stderr]    Compiling memchr v2.3.4
[INFO] [stderr]    Compiling pkg-config v0.3.19
[INFO] [stderr]    Compiling cc v1.0.66
[INFO] [stderr]     Checking slab v0.4.2
[INFO] [stderr]     Checking futures-core v0.3.8
[INFO] [stderr]     Checking bytes v0.5.6
[INFO] [stderr]    Compiling pin-project-internal v0.4.27
[INFO] [stderr]     Checking pin-project-lite v0.1.11
[INFO] [stderr]     Checking itoa v0.4.6
[INFO] [stderr]     Checking matches v0.1.8
[INFO] [stderr]    Compiling openssl v0.10.30
[INFO] [stderr]     Checking once_cell v1.5.2
[INFO] [stderr]     Checking foreign-types-shared v0.1.1
[INFO] [stderr]     Checking pin-project-lite v0.2.0
[INFO] [stderr]    Compiling httparse v1.3.4
[INFO] [stderr]     Checking futures-io v0.3.8
[INFO] [stderr]     Checking futures-sink v0.3.8
[INFO] [stderr]     Checking pin-utils v0.1.0
[INFO] [stderr]     Checking tinyvec_macros v0.1.0
[INFO] [stderr]     Checking hashbrown v0.9.1
[INFO] [stderr]    Compiling native-tls v0.2.6
[INFO] [stderr]     Checking try-lock v0.2.3
[INFO] [stderr]    Compiling serde v1.0.118
[INFO] [stderr]     Checking openssl-probe v0.1.2
[INFO] [stderr]     Checking httpdate v0.3.2
[INFO] [stderr]    Compiling encoding_rs v0.8.26
[INFO] [stderr]     Checking adler v0.2.3
[INFO] [stderr]     Checking tower-service v0.3.0
[INFO] [stderr]     Checking gimli v0.23.0
[INFO] [stderr]     Checking object v0.22.0
[INFO] [stderr]     Checking mime v0.3.16
[INFO] [stderr]     Checking rustc-demangle v0.1.18
[INFO] [stderr]     Checking ipnet v2.3.0
[INFO] [stderr]     Checking regex-syntax v0.6.21
[INFO] [stderr]    Compiling indexmap v1.6.0
[INFO] [stderr]    Compiling miniz_oxide v0.4.3
[INFO] [stderr]    Compiling unicase v2.6.0
[INFO] [stderr]     Checking tracing-core v0.1.17
[INFO] [stderr]    Compiling ryu v1.0.5
[INFO] [stderr]    Compiling error-chain v0.12.4
[INFO] [stderr]     Checking thread_local v1.0.1
[INFO] [stderr]     Checking unicode-bidi v0.3.4
[INFO] [stderr]     Checking form_urlencoded v1.0.0
[INFO] [stderr]     Checking foreign-types v0.3.2
[INFO] [stderr]     Checking futures-channel v0.3.8
[INFO] [stderr]     Checking futures-task v0.3.8
[INFO] [stderr]     Checking want v0.3.0
[INFO] [stderr]     Checking addr2line v0.14.0
[INFO] [stderr]     Checking tinyvec v1.1.0
[INFO] [stderr]     Checking tracing v0.1.22
[INFO] [stderr]     Checking http v0.2.1
[INFO] [stderr]     Checking aho-corasick v0.7.15
[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-1.0.54/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=a9a0cfe7ebb344fb -C extra-filename=-a9a0cfe7ebb344fb --out-dir /opt/rustwide/target/debug/deps -L dependency=/opt/rustwide/target/debug/deps --extern proc_macro2=/opt/rustwide/target/debug/deps/libproc_macro2-4d038e1ab37629ce.rmeta --extern quote=/opt/rustwide/target/debug/deps/libquote-f69ce0b9554421d1.rmeta --extern unicode_xid=/opt/rustwide/target/debug/deps/libunicode_xid-a00294059a9d31c4.rmeta --cap-lints allow --cap-lints=warn --cfg syn_disable_nightly_tests` (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" "8f7b313afdf9e3c34ac0cc20a56067c907ecbedebf2d577b085134a1cdd96462", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "8f7b313afdf9e3c34ac0cc20a56067c907ecbedebf2d577b085134a1cdd96462", kill_on_drop: false }`
[INFO] [stdout] 8f7b313afdf9e3c34ac0cc20a56067c907ecbedebf2d577b085134a1cdd96462