[INFO] fetching crate below 0.3.0...
[INFO] checking below-0.3.0 against 1.55.0 for beta-1.56-3
[INFO] extracting crate below 0.3.0 into /workspace/builds/worker-81/source
[INFO] validating manifest of crates.io crate below 0.3.0 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 crates.io crate below 0.3.0
[INFO] finished tweaking crates.io crate below 0.3.0
[INFO] tweaked toml for crates.io crate below 0.3.0 written to /workspace/builds/worker-81/source/Cargo.toml
[INFO] crate crates.io crate below 0.3.0 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 vsprintf v2.0.0
[INFO] [stderr]   Downloaded nix v0.21.0
[INFO] [stderr]   Downloaded cargo-platform v0.1.1
[INFO] [stderr]   Downloaded slog-async v2.6.0
[INFO] [stderr]   Downloaded users v0.11.0
[INFO] [stderr]   Downloaded libbpf-sys v0.4.0-2
[INFO] [stderr]   Downloaded libbpf-rs v0.11.2
[INFO] [stderr]   Downloaded below-view v0.3.0
[INFO] [stderr]   Downloaded below-dump v0.3.0
[INFO] [stderr]   Downloaded libbpf-cargo v0.8.0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-81/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-81/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] 38f3b3f585788a89adee464b8f6f3ce040068aa1ff9f1f2c46af6ab49094fec4
[INFO] running `Command { std: "docker" "start" "-a" "38f3b3f585788a89adee464b8f6f3ce040068aa1ff9f1f2c46af6ab49094fec4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "38f3b3f585788a89adee464b8f6f3ce040068aa1ff9f1f2c46af6ab49094fec4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "38f3b3f585788a89adee464b8f6f3ce040068aa1ff9f1f2c46af6ab49094fec4", kill_on_drop: false }`
[INFO] [stdout] 38f3b3f585788a89adee464b8f6f3ce040068aa1ff9f1f2c46af6ab49094fec4
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-81/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-81/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" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 890028e2ec6c65079e31275e37b5e3537bdfc34e364fe6a454e9907c7487431d
[INFO] running `Command { std: "docker" "start" "-a" "890028e2ec6c65079e31275e37b5e3537bdfc34e364fe6a454e9907c7487431d", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.98
[INFO] [stderr]    Compiling proc-macro2 v1.0.27
[INFO] [stderr]    Compiling unicode-xid v0.2.2
[INFO] [stderr]    Compiling syn v1.0.73
[INFO] [stderr]     Checking cfg-if v1.0.0
[INFO] [stderr]    Compiling serde_derive v1.0.126
[INFO] [stderr]    Compiling serde v1.0.126
[INFO] [stderr]    Compiling autocfg v1.0.1
[INFO] [stderr]    Compiling bitflags v1.2.1
[INFO] [stderr]    Compiling version_check v0.9.3
[INFO] [stderr]    Compiling log v0.4.14
[INFO] [stderr]    Compiling memchr v2.4.0
[INFO] [stderr]     Checking lazy_static v1.4.0
[INFO] [stderr]    Compiling ryu v1.0.5
[INFO] [stderr]     Checking once_cell v1.8.0
[INFO] [stderr]    Compiling anyhow v1.0.42
[INFO] [stderr]    Compiling strsim v0.9.3
[INFO] [stderr]    Compiling ident_case v1.0.1
[INFO] [stderr]    Compiling fnv v1.0.7
[INFO] [stderr]    Compiling serde_json v1.0.64
[INFO] [stderr]    Compiling crossbeam-utils v0.8.5
[INFO] [stderr]     Checking smallvec v1.6.1
[INFO] [stderr]     Checking unicode-width v0.1.8
[INFO] [stderr]    Compiling slog v2.7.0
[INFO] [stderr]     Checking scopeguard v1.1.0
[INFO] [stderr]    Compiling unicode-segmentation v1.8.0
[INFO] [stderr]    Compiling signal-hook v0.3.9
[INFO] [stderr]     Checking array-macro v1.0.5
[INFO] [stderr]     Checking stable_deref_trait v1.2.0
[INFO] [stderr]     Checking xi-unicode v0.3.0
[INFO] [stderr]    Compiling pkg-config v0.3.19
[INFO] [stderr]    Compiling ucd-trie v0.1.3
[INFO] [stderr]     Checking numtoa v0.1.0
[INFO] [stderr]     Checking regex-syntax v0.6.25
[INFO] [stderr]     Checking quick-error v1.2.3
[INFO] [stderr]     Checking match_cfg v0.1.0
[INFO] [stderr]    Compiling zstd-safe v4.0.0+zstd.1.4.9
[INFO] [stderr]    Compiling ppv-lite86 v0.2.10
[INFO] [stderr]     Checking itoa v0.4.7
[INFO] [stderr]    Compiling strsim v0.8.0
[INFO] [stderr]    Compiling vec_map v0.8.2
[INFO] [stderr]    Compiling semver v1.0.3
[INFO] [stderr]    Compiling ansi_term v0.11.0
[INFO] [stderr]    Compiling getrandom v0.1.16
[INFO] [stderr]    Compiling futures-core v0.3.15
[INFO] [stderr]     Checking half v1.7.1
[INFO] [stderr]    Compiling remove_dir_all v0.5.3
[INFO] [stderr]    Compiling scroll v0.10.2
[INFO] [stderr]     Checking static_assertions v1.1.0
[INFO] [stderr]     Checking maplit v1.0.2
[INFO] [stderr]     Checking same-file v1.0.6
[INFO] [stderr]     Checking take_mut v0.2.2
[INFO] [stderr]     Checking plain v0.2.3
[INFO] [stderr]     Checking instant v0.1.10
[INFO] [stderr]    Compiling textwrap v0.11.0
[INFO] [stderr]     Checking owning_ref v0.4.1
[INFO] [stderr]     Checking thread_local v1.1.3
[INFO] [stderr]     Checking humantime v1.3.0
[INFO] [stderr]     Checking lock_api v0.4.4
[INFO] [stderr]    Compiling pest v2.1.3
[INFO] [stderr]     Checking walkdir v2.3.2
[INFO] [stderr]    Compiling ahash v0.6.3
[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 num-traits v0.2.14
[INFO] [stderr]    Compiling num-integer v0.1.44
[INFO] [stderr]    Compiling num-rational v0.3.2
[INFO] [stderr]    Compiling num-iter v0.1.42
[INFO] [stderr]    Compiling memoffset v0.6.4
[INFO] [stderr]     Checking crossbeam-channel v0.5.1
[INFO] [stderr]    Compiling aho-corasick v0.7.18
[INFO] [stderr]     Checking slog-async v2.6.0
[INFO] [stderr]     Checking quote v1.0.9
[INFO] [stderr]    Compiling jobserver v0.1.22
[INFO] [stderr]    Compiling getrandom v0.2.3
[INFO] [stderr]    Compiling atty v0.2.14
[INFO] [stderr]    Compiling memmap2 v0.3.0
[INFO] [stderr]    Compiling clap v2.33.3
[INFO] [stderr]    Compiling cc v1.0.69
[INFO] [stderr]    Compiling rand_core v0.6.3
[INFO] [stderr]    Compiling semver-parser v0.10.2
[INFO] [stderr]    Compiling regex v1.5.4
[INFO] [stderr]    Compiling rand_chacha v0.3.1
[INFO] [stderr]     Checking num-complex v0.3.1
[INFO] [stderr]     Checking signal-hook-registry v1.4.0
[INFO] [stderr]     Checking mio v0.7.13
[INFO] [stderr]     Checking time v0.1.43
[INFO] [stderr]     Checking parking_lot_core v0.8.3
[INFO] [stderr]     Checking dirs-sys-next v0.1.2
[INFO] [stderr]     Checking openat v0.1.21
[INFO] [stderr]     Checking num_cpus v1.13.0
[INFO] [stderr]     Checking termion v1.5.6
[INFO] [stderr]     Checking nix v0.20.0
[INFO] [stderr]     Checking hostname v0.3.1
[INFO] [stderr]     Checking memmap v0.7.0
[INFO] [stderr]     Checking nix v0.21.0
[INFO] [stderr]     Checking users v0.11.0
[INFO] [stderr]     Checking rand v0.4.6
[INFO] [stderr]    Compiling darling_core v0.10.2
[INFO] [stderr]     Checking rand_core v0.5.1
[INFO] [stderr]    Compiling zstd-sys v1.5.0+zstd.1.4.9
[INFO] [stderr]    Compiling libbpf-sys v0.4.0-2
[INFO] [stderr]    Compiling vsprintf v2.0.0
[INFO] [stderr]    Compiling rand v0.8.4
[INFO] [stderr]     Checking dirs-next v2.0.0
[INFO] [stderr]     Checking threadpool v1.8.1
[INFO] [stderr]     Checking parking_lot v0.11.1
[INFO] [stderr]     Checking rand_pcg v0.2.1
[INFO] [stderr]     Checking rand_chacha v0.2.2
[INFO] [stderr]     Checking signal-hook v0.1.17
[INFO] [stderr]     Checking tempdir v0.3.7
[INFO] [stderr]     Checking term v0.7.0
[INFO] [stderr]     Checking num v0.3.1
[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-1.0.73/src/lib.rs --error-format=json --json=diagnostic-rendered-ansi,artifacts --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"' --cfg 'feature="visit"' --cfg 'feature="visit-mut"' -C metadata=e87c37e71e9e8657 -C extra-filename=-e87c37e71e9e8657 --out-dir /opt/rustwide/target/debug/deps -L dependency=/opt/rustwide/target/debug/deps --extern proc_macro2=/opt/rustwide/target/debug/deps/libproc_macro2-283fad16493adf62.rmeta --extern quote=/opt/rustwide/target/debug/deps/libquote-cf6158c23ff62a4c.rmeta --extern unicode_xid=/opt/rustwide/target/debug/deps/libunicode_xid-5ecee5fca1210f52.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" "890028e2ec6c65079e31275e37b5e3537bdfc34e364fe6a454e9907c7487431d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "890028e2ec6c65079e31275e37b5e3537bdfc34e364fe6a454e9907c7487431d", kill_on_drop: false }`
[INFO] [stdout] 890028e2ec6c65079e31275e37b5e3537bdfc34e364fe6a454e9907c7487431d
