[INFO] fetching crate sheldon 0.6.6...
[INFO] testing sheldon-0.6.6 against 1.59.0 for beta-1.60-1
[INFO] extracting crate sheldon 0.6.6 into /workspace/builds/worker-25/source
[INFO] validating manifest of crates.io crate sheldon 0.6.6 on toolchain 1.59.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.59.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate sheldon 0.6.6
[INFO] finished tweaking crates.io crate sheldon 0.6.6
[INFO] tweaked toml for crates.io crate sheldon 0.6.6 written to /workspace/builds/worker-25/source/Cargo.toml
[INFO] crate crates.io crate sheldon 0.6.6 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.59.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded crossbeam-utils v0.8.6
[INFO] [stderr]   Downloaded serde_json v1.0.78
[INFO] [stderr]   Downloaded cc v1.0.72
[INFO] [stderr]   Downloaded globset v0.4.8
[INFO] [stderr]   Downloaded pretty_assertions v1.0.0
[INFO] [stderr]   Downloaded git2 v0.13.25
[INFO] [stderr]   Downloaded curl v0.4.42
[INFO] [stderr]   Downloaded thread_local v1.1.4
[INFO] [stderr]   Downloaded diff v0.1.12
[INFO] [stderr]   Downloaded goldie v0.1.0
[INFO] [stderr]   Downloaded socket2 v0.4.4
[INFO] [stderr]   Downloaded jobserver v0.1.24
[INFO] [stderr]   Downloaded ignore v0.4.18
[INFO] [stderr]   Downloaded toml_edit v0.13.3
[INFO] [stderr]   Downloaded tinytemplate v1.2.1
[INFO] [stderr]   Downloaded handlebars v4.2.1
[INFO] [stderr]   Downloaded itertools v0.10.3
[INFO] [stderr]   Downloaded bstr v0.2.17
[INFO] [stderr]   Downloaded crossbeam-epoch v0.9.6
[INFO] [stderr]   Downloaded clap_derive v3.0.12
[INFO] [stderr]   Downloaded clap_complete v3.0.5
[INFO] [stderr]   Downloaded globwalk v0.8.1
[INFO] [stderr]   Downloaded casual v0.2.0
[INFO] [stderr]   Downloaded regex-macro v0.2.0
[INFO] [stderr]   Downloaded combine v4.6.3
[INFO] [stderr]   Downloaded clap v3.0.13
[INFO] [stderr]   Downloaded libc v0.2.116
[INFO] [stderr]   Downloaded kstring v1.0.6
[INFO] [stderr]   Downloaded libgit2-sys v0.12.26+1.3.0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-25/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-25/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@sha256:0cd99ca24d8e8c98e67c542213511d985b8778b5bdcbb160e038429496686047" "/opt/rustwide/cargo-home/bin/cargo" "+1.59.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 6e656aaa171d2d7ad9e7a37c6005a5ed597d6b30fe829b52d8c5d8556f67ed4f
[INFO] running `Command { std: "docker" "start" "-a" "6e656aaa171d2d7ad9e7a37c6005a5ed597d6b30fe829b52d8c5d8556f67ed4f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "6e656aaa171d2d7ad9e7a37c6005a5ed597d6b30fe829b52d8c5d8556f67ed4f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "6e656aaa171d2d7ad9e7a37c6005a5ed597d6b30fe829b52d8c5d8556f67ed4f", kill_on_drop: false }`
[INFO] [stdout] 6e656aaa171d2d7ad9e7a37c6005a5ed597d6b30fe829b52d8c5d8556f67ed4f
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-25/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-25/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@sha256:0cd99ca24d8e8c98e67c542213511d985b8778b5bdcbb160e038429496686047" "/opt/rustwide/cargo-home/bin/cargo" "+1.59.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 07c985c951f47e86cf5e03405de782536d387fa8ebd4e03b4c47853a9f128af9
[INFO] running `Command { std: "docker" "start" "-a" "07c985c951f47e86cf5e03405de782536d387fa8ebd4e03b4c47853a9f128af9", 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]    Compiling libc v0.2.116
[INFO] [stderr]    Compiling autocfg v1.0.1
[INFO] [stderr]    Compiling proc-macro2 v1.0.36
[INFO] [stderr]    Compiling unicode-xid v0.2.2
[INFO] [stderr]    Compiling syn v1.0.86
[INFO] [stderr]    Compiling pkg-config v0.3.24
[INFO] [stderr]    Compiling cfg-if v1.0.0
[INFO] [stderr]    Compiling crossbeam-utils v0.8.6
[INFO] [stderr]    Compiling memchr v2.4.1
[INFO] [stderr]    Compiling serde_derive v1.0.136
[INFO] [stderr]    Compiling serde v1.0.136
[INFO] [stderr]    Compiling crossbeam-epoch v0.9.6
[INFO] [stderr]    Compiling version_check v0.9.4
[INFO] [stderr]    Compiling scopeguard v1.1.0
[INFO] [stderr]    Compiling rayon-core v1.9.1
[INFO] [stderr]    Compiling either v1.6.1
[INFO] [stderr]    Compiling log v0.4.14
[INFO] [stderr]    Compiling regex-syntax v0.6.25
[INFO] [stderr]    Compiling hashbrown v0.11.2
[INFO] [stderr]    Compiling tinyvec_macros v0.1.0
[INFO] [stderr]    Compiling ucd-trie v0.1.3
[INFO] [stderr]    Compiling once_cell v1.9.0
[INFO] [stderr]    Compiling bitflags v1.3.2
[INFO] [stderr]    Compiling matches v0.1.9
[INFO] [stderr]    Compiling anyhow v1.0.53
[INFO] [stderr]    Compiling maplit v1.0.2
[INFO] [stderr]    Compiling fnv v1.0.7
[INFO] [stderr]    Compiling serde_json v1.0.78
[INFO] [stderr]    Compiling same-file v1.0.6
[INFO] [stderr]    Compiling heck v0.4.0
[INFO] [stderr]    Compiling percent-encoding v2.1.0
[INFO] [stderr]    Compiling unicode-bidi v0.3.7
[INFO] [stderr]    Compiling ryu v1.0.9
[INFO] [stderr]    Compiling bytes v1.1.0
[INFO] [stderr]    Compiling openssl-probe v0.1.5
[INFO] [stderr]    Compiling itoa v1.0.1
[INFO] [stderr]    Compiling curl v0.4.42
[INFO] [stderr]    Compiling termcolor v1.1.2
[INFO] [stderr]    Compiling textwrap v0.14.2
[INFO] [stderr]    Compiling strsim v0.10.0
[INFO] [stderr]    Compiling quick-error v2.0.1
[INFO] [stderr]    Compiling home v0.5.3
[INFO] [stderr]    Compiling casual v0.2.0
[INFO] [stderr]    Compiling ansi_term v0.12.1
[INFO] [stderr]    Compiling thread_local v1.1.4
[INFO] [stderr]    Compiling tinyvec v1.5.1
[INFO] [stderr]    Compiling pest v2.1.3
[INFO] [stderr]    Compiling form_urlencoded v1.0.1
[INFO] [stderr]    Compiling walkdir v2.3.2
[INFO] [stderr]    Compiling itertools v0.10.3
[INFO] [stderr]    Compiling memoffset v0.6.5
[INFO] [stderr]    Compiling rayon v1.5.1
[INFO] [stderr]    Compiling indexmap v1.8.0
[INFO] [stderr]    Compiling proc-macro-error-attr v1.0.4
[INFO] [stderr]    Compiling proc-macro-error v1.0.4
[INFO] [stderr]    Compiling crossbeam-channel v0.5.2
[INFO] [stderr]    Compiling aho-corasick v0.7.18
[INFO] [stderr]    Compiling bstr v0.2.17
[INFO] [stderr]    Compiling os_str_bytes v6.0.0
[INFO] [stderr]    Compiling combine v4.6.3
[INFO] [stderr]    Compiling sheldon v0.6.6 (/opt/rustwide/workdir)
[INFO] [stderr]    Compiling quote v1.0.15
[INFO] [stderr]    Compiling jobserver v0.1.24
[INFO] [stderr]    Compiling num_cpus v1.13.1
[INFO] [stderr]    Compiling atty v0.2.14
[INFO] [stderr]    Compiling socket2 v0.4.4
[INFO] [stderr]    Compiling fs2 v0.4.3
[INFO] [stderr]    Compiling which v4.2.4
[INFO] [stderr]    Compiling unicode-normalization v0.1.19
[INFO] [stderr]    Compiling pest_meta v2.1.3
[INFO] [stderr]    Compiling cc v1.0.72
[INFO] [stderr]    Compiling crossbeam-deque v0.8.1
[INFO] [stderr]    Compiling idna v0.2.3
[INFO] [stderr]    Compiling regex v1.5.4
[INFO] [stderr]    Compiling openssl-sys v0.9.72
[INFO] [stderr]    Compiling libz-sys v1.1.3
[INFO] [stderr]    Compiling libssh2-sys v0.2.23
[INFO] [stderr]    Compiling curl-sys v0.4.52+curl-7.81.0
[INFO] [stderr]    Compiling libgit2-sys v0.12.26+1.3.0
[INFO] [stderr]    Compiling globset v0.4.8
[INFO] [stderr]    Compiling regex-macro v0.2.0
[INFO] [stderr]    Compiling pest_generator v2.1.3
[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-1.0.86/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="full"' --cfg 'feature="parsing"' --cfg 'feature="printing"' --cfg 'feature="proc-macro"' --cfg 'feature="quote"' -C metadata=cb5ca05e8c2784cc -C extra-filename=-cb5ca05e8c2784cc --out-dir /opt/rustwide/target/debug/deps -L dependency=/opt/rustwide/target/debug/deps --extern proc_macro2=/opt/rustwide/target/debug/deps/libproc_macro2-e91ec37ac01f916c.rmeta --extern quote=/opt/rustwide/target/debug/deps/libquote-5f4666774155f97d.rmeta --extern unicode_xid=/opt/rustwide/target/debug/deps/libunicode_xid-aeb18ec3bc792598.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" "07c985c951f47e86cf5e03405de782536d387fa8ebd4e03b4c47853a9f128af9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "07c985c951f47e86cf5e03405de782536d387fa8ebd4e03b4c47853a9f128af9", kill_on_drop: false }`
[INFO] [stdout] 07c985c951f47e86cf5e03405de782536d387fa8ebd4e03b4c47853a9f128af9