[INFO] cloning repository https://github.com/Michael-F-Bryan/mdbook-linkcheck
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/Michael-F-Bryan/mdbook-linkcheck" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FMichael-F-Bryan%2Fmdbook-linkcheck", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FMichael-F-Bryan%2Fmdbook-linkcheck'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 89ee96da7ab5367634eaad5242b968f61f0cd7e1
[INFO] testing Michael-F-Bryan/mdbook-linkcheck against 1.63.0 for beta-1.64-2
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FMichael-F-Bryan%2Fmdbook-linkcheck" "/workspace/builds/worker-2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-2/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/Michael-F-Bryan/mdbook-linkcheck on toolchain 1.63.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.63.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] removed /workspace/builds/worker-2/source/.cargo/config
[INFO] started tweaking git repo https://github.com/Michael-F-Bryan/mdbook-linkcheck
[INFO] finished tweaking git repo https://github.com/Michael-F-Bryan/mdbook-linkcheck
[INFO] tweaked toml for git repo https://github.com/Michael-F-Bryan/mdbook-linkcheck written to /workspace/builds/worker-2/source/Cargo.toml
[INFO] crate git repo https://github.com/Michael-F-Bryan/mdbook-linkcheck already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.63.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded serde_derive v1.0.130
[INFO] [stderr]   Downloaded version_check v0.9.3
[INFO] [stderr]   Downloaded native-tls v0.2.8
[INFO] [stderr]   Downloaded security-framework v2.4.2
[INFO] [stderr]   Downloaded generic-array v0.12.4
[INFO] [stderr]   Downloaded crc32fast v1.2.1
[INFO] [stderr]   Downloaded build-info-build v0.0.21
[INFO] [stderr]   Downloaded build-info-proc v0.0.21
[INFO] [stderr]   Downloaded dunce v1.0.2
[INFO] [stderr]   Downloaded cargo-platform v0.1.2
[INFO] [stderr]   Downloaded linkcheck v0.4.1
[INFO] [stderr]   Downloaded derive_more v0.99.16
[INFO] [stderr]   Downloaded linkify v0.7.0
[INFO] [stderr]   Downloaded semver-parser v0.10.2
[INFO] [stderr]   Downloaded env_logger v0.8.4
[INFO] [stderr]   Downloaded bzip2 v0.4.3
[INFO] [stderr]   Downloaded convert_case v0.4.0
[INFO] [stderr]   Downloaded itoa v0.4.8
[INFO] [stderr]   Downloaded semver v1.0.4
[INFO] [stderr]   Downloaded openssl-probe v0.1.4
[INFO] [stderr]   Downloaded cc v1.0.72
[INFO] [stderr]   Downloaded ppv-lite86 v0.2.15
[INFO] [stderr]   Downloaded termcolor v1.1.2
[INFO] [stderr]   Downloaded socket2 v0.4.2
[INFO] [stderr]   Downloaded unicode-segmentation v1.8.0
[INFO] [stderr]   Downloaded opener v0.5.0
[INFO] [stderr]   Downloaded core-foundation-sys v0.8.3
[INFO] [stderr]   Downloaded ntapi v0.3.6
[INFO] [stderr]   Downloaded tracing v0.1.29
[INFO] [stderr]   Downloaded syn v1.0.81
[INFO] [stderr]   Downloaded hyper v0.14.14
[INFO] [stderr]   Downloaded diff v0.1.12
[INFO] [stderr]   Downloaded indexmap v1.7.0
[INFO] [stderr]   Downloaded openssl v0.10.38
[INFO] [stderr]   Downloaded bstr v0.2.17
[INFO] [stderr]   Downloaded format-buf v1.0.0
[INFO] [stderr]   Downloaded num-bigint v0.3.3
[INFO] [stderr]   Downloaded xz2 v0.1.6
[INFO] [stderr]   Downloaded zip v0.5.13
[INFO] [stderr]   Downloaded env_logger v0.9.0
[INFO] [stderr]   Downloaded git2 v0.13.23
[INFO] [stderr]   Downloaded cargo_metadata v0.12.3
[INFO] [stderr]   Downloaded topological-sort v0.1.0
[INFO] [stderr]   Downloaded futures-channel v0.3.17
[INFO] [stderr]   Downloaded regex-automata v0.1.10
[INFO] [stderr]   Downloaded openssl-sys v0.9.70
[INFO] [stderr]   Downloaded bzip2-sys v0.1.11+1.0.8
[INFO] [stderr]   Downloaded libc v0.2.107
[INFO] [stderr]   Downloaded libz-sys v1.1.3
[INFO] [stderr]   Downloaded tokio v1.13.0
[INFO] [stderr]   Downloaded web-sys v0.3.55
[INFO] [stderr]   Downloaded libgit2-sys v0.12.24+1.3.0
[INFO] [stderr]   Downloaded lzma-sys v0.1.17
[INFO] [stderr]   Downloaded encoding_rs v0.8.29
[INFO] [stderr]   Downloaded futures-task v0.3.17
[INFO] [stderr]   Downloaded mdbook v0.4.13
[INFO] [stderr]   Downloaded httpdate v1.0.1
[INFO] [stderr]   Downloaded vcpkg v0.2.15
[INFO] [stderr]   Downloaded pulldown-cmark v0.7.2
[INFO] [stderr]   Downloaded futures-sink v0.3.17
[INFO] [stderr]   Downloaded openssl-src v300.0.2+3.0.0
[INFO] [stderr]   Downloaded build-info-common v0.0.21
[INFO] [stderr]   Downloaded structopt v0.3.25
[INFO] [stderr]   Downloaded js-sys v0.3.55
[INFO] [stderr]   Downloaded ipnet v2.3.1
[INFO] [stderr]   Downloaded rand_hc v0.3.1
[INFO] [stderr]   Downloaded serde_json v1.0.69
[INFO] [stderr]   Downloaded httparse v1.5.1
[INFO] [stderr]   Downloaded tracing-core v0.1.21
[INFO] [stderr]   Downloaded mio v0.7.14
[INFO] [stderr]   Downloaded core-foundation v0.9.2
[INFO] [stderr]   Downloaded serde v1.0.130
[INFO] [stderr]   Downloaded pin-project-lite v0.2.7
[INFO] [stderr]   Downloaded proc-macro2 v1.0.32
[INFO] [stderr]   Downloaded quote v1.0.10
[INFO] [stderr]   Downloaded humantime v2.1.0
[INFO] [stderr]   Downloaded rustc_version v0.3.3
[INFO] [stderr]   Downloaded codespan v0.11.1
[INFO] [stderr]   Downloaded regex v1.5.4
[INFO] [stderr]   Downloaded ctor v0.1.21
[INFO] [stderr]   Downloaded output_vt100 v0.1.2
[INFO] [stderr]   Downloaded once_cell v1.8.0
[INFO] [stderr]   Downloaded pulldown-cmark v0.8.0
[INFO] [stderr]   Downloaded http v0.2.5
[INFO] [stderr]   Downloaded pkg-config v0.3.22
[INFO] [stderr]   Downloaded wasm-bindgen-futures v0.4.28
[INFO] [stderr]   Downloaded wasm-bindgen-backend v0.2.78
[INFO] [stderr]   Downloaded wasm-bindgen-shared v0.2.78
[INFO] [stderr]   Downloaded wasm-bindgen-macro v0.2.78
[INFO] [stderr]   Downloaded reqwest v0.11.6
[INFO] [stderr]   Downloaded bumpalo v3.8.0
[INFO] [stderr]   Downloaded wasm-bindgen-macro-support v0.2.78
[INFO] [stderr]   Downloaded handlebars v4.1.4
[INFO] [stderr]   Downloaded futures-io v0.3.17
[INFO] [stderr]   Downloaded security-framework-sys v2.4.2
[INFO] [stderr]   Downloaded anyhow v1.0.45
[INFO] [stderr]   Downloaded typenum v1.14.0
[INFO] [stderr]   Downloaded pretty_assertions v1.0.0
[INFO] [stderr]   Downloaded regex-syntax v0.6.25
[INFO] [stderr]   Downloaded build-info v0.0.21
[INFO] [stderr]   Downloaded pretty_assertions v0.6.1
[INFO] [stderr]   Downloaded codespan-reporting v0.11.1
[INFO] [stderr]   Downloaded shlex v1.1.0
[INFO] [stderr]   Downloaded futures-macro v0.3.17
[INFO] [stderr]   Downloaded proc-macro-hack v0.5.19
[INFO] [stderr]   Downloaded proc-macro-nested v0.1.7
[INFO] [stderr]   Downloaded futures-util v0.3.17
[INFO] [stderr]   Downloaded jobserver v0.1.24
[INFO] [stderr]   Downloaded getrandom v0.2.3
[INFO] [stderr]   Downloaded rand v0.8.4
[INFO] [stderr]   Downloaded tempfile v3.2.0
[INFO] [stderr]   Downloaded tokio-native-tls v0.3.0
[INFO] [stderr]   Downloaded futures-executor v0.3.17
[INFO] [stderr]   Downloaded hyper-tls v0.5.0
[INFO] [stderr]   Downloaded futures v0.3.17
[INFO] [stderr]   Downloaded aho-corasick v0.7.18
[INFO] [stderr]   Downloaded quick-error v2.0.1
[INFO] [stderr]   Downloaded futures-core v0.3.17
[INFO] [stderr]   Downloaded h2 v0.3.7
[INFO] [stderr]   Downloaded wasm-bindgen v0.2.78
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/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@sha256:824c28ce115f6b999260af6986f3384c158e782489540e41c0b698ca1d9fd927" "/opt/rustwide/cargo-home/bin/cargo" "+1.63.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 175e5eaa0fa805b5efd2f8a89fe5b767ceb6f01b3c3579420400c6535d69f346
[INFO] running `Command { std: "docker" "start" "-a" "175e5eaa0fa805b5efd2f8a89fe5b767ceb6f01b3c3579420400c6535d69f346", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "175e5eaa0fa805b5efd2f8a89fe5b767ceb6f01b3c3579420400c6535d69f346", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "175e5eaa0fa805b5efd2f8a89fe5b767ceb6f01b3c3579420400c6535d69f346", kill_on_drop: false }`
[INFO] [stdout] 175e5eaa0fa805b5efd2f8a89fe5b767ceb6f01b3c3579420400c6535d69f346
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/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" "RUSTDOCFLAGS=--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@sha256:824c28ce115f6b999260af6986f3384c158e782489540e41c0b698ca1d9fd927" "/opt/rustwide/cargo-home/bin/cargo" "+1.63.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 8df35ed4086c1c935ac38ee15a989a64033dbebc8d0ccdfeb71c2120fdb5ae2f
[INFO] running `Command { std: "docker" "start" "-a" "8df35ed4086c1c935ac38ee15a989a64033dbebc8d0ccdfeb71c2120fdb5ae2f", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.32
[INFO] [stderr]    Compiling unicode-xid v0.2.2
[INFO] [stderr]    Compiling libc v0.2.107
[INFO] [stderr]    Compiling syn v1.0.81
[INFO] [stderr]    Compiling cfg-if v1.0.0
[INFO] [stderr]    Compiling memchr v2.4.1
[INFO] [stderr]    Compiling log v0.4.14
[INFO] [stderr]    Compiling version_check v0.9.3
[INFO] [stderr]    Compiling pin-project-lite v0.2.7
[INFO] [stderr]    Compiling serde_derive v1.0.130
[INFO] [stderr]    Compiling serde v1.0.130
[INFO] [stderr]    Compiling futures-core v0.3.17
[INFO] [stderr]    Compiling cc v1.0.72
[INFO] [stderr]    Compiling pkg-config v0.3.22
[INFO] [stderr]    Compiling proc-macro-hack v0.5.19
[INFO] [stderr]    Compiling bitflags v1.3.2
[INFO] [stderr]    Compiling itoa v0.4.8
[INFO] [stderr]    Compiling futures-channel v0.3.17
[INFO] [stderr]    Compiling futures-task v0.3.17
[INFO] [stderr]    Compiling unicode-width v0.1.9
[INFO] [stderr]    Compiling bytes v1.1.0
[INFO] [stderr]    Compiling proc-macro-nested v0.1.7
[INFO] [stderr]    Compiling futures-sink v0.3.17
[INFO] [stderr]    Compiling futures-io v0.3.17
[INFO] [stderr]    Compiling slab v0.4.5
[INFO] [stderr]    Compiling openssl v0.10.38
[INFO] [stderr]    Compiling foreign-types-shared v0.1.1
[INFO] [stderr]    Compiling native-tls v0.2.8
[INFO] [stderr]    Compiling ucd-trie v0.1.3
[INFO] [stderr]    Compiling tinyvec_macros v0.1.0
[INFO] [stderr]    Compiling termcolor v1.1.2
[INFO] [stderr]    Compiling hashbrown v0.11.2
[INFO] [stderr]    Compiling once_cell v1.8.0
[INFO] [stderr]    Compiling httparse v1.5.1
[INFO] [stderr]    Compiling matches v0.1.9
[INFO] [stderr]    Compiling maplit v1.0.2
[INFO] [stderr]    Compiling openssl-probe v0.1.4
[INFO] [stderr]    Compiling serde_json v1.0.69
[INFO] [stderr]    Compiling ppv-lite86 v0.2.15
[INFO] [stderr]    Compiling regex-syntax v0.6.25
[INFO] [stderr]    Compiling tower-service v0.3.1
[INFO] [stderr]    Compiling unicode-bidi v0.3.7
[INFO] [stderr]    Compiling httpdate v1.0.1
[INFO] [stderr]    Compiling encoding_rs v0.8.29
[INFO] [stderr]    Compiling pulldown-cmark v0.8.0
[INFO] [stderr]    Compiling strsim v0.8.0
[INFO] [stderr]    Compiling unicode-segmentation v1.8.0
[INFO] [stderr]    Compiling anyhow v1.0.45
[INFO] [stderr]    Compiling quick-error v1.2.3
[INFO] [stderr]    Compiling vec_map v0.8.2
[INFO] [stderr]    Compiling pulldown-cmark v0.7.2
[INFO] [stderr]    Compiling ansi_term v0.11.0
[INFO] [stderr]    Compiling regex-automata v0.1.10
[INFO] [stderr]    Compiling ipnet v2.3.1
[INFO] [stderr]    Compiling quick-error v2.0.1
[INFO] [stderr]    Compiling semver v1.0.4
[INFO] [stderr]    Compiling remove_dir_all v0.5.3
[INFO] [stderr]    Compiling base64 v0.13.0
[INFO] [stderr]    Compiling shlex v1.1.0
[INFO] [stderr]    Compiling topological-sort v0.1.0
[INFO] [stderr]    Compiling dunce v1.0.2
[INFO] [stderr]    Compiling humantime v2.1.0
[INFO] [stderr]    Compiling futures-macro v0.3.17
[INFO] [stderr]    Compiling futures-util v0.3.17
[INFO] [stderr]    Compiling tokio v1.13.0
[INFO] [stderr]    Compiling indexmap v1.7.0
[INFO] [stderr]    Compiling num-traits v0.2.14
[INFO] [stderr]    Compiling num-integer v0.1.44
[INFO] [stderr]    Compiling tracing-core v0.1.21
[INFO] [stderr]    Compiling getopts v0.2.21
[INFO] [stderr]    Compiling textwrap v0.11.0
[INFO] [stderr]    Compiling foreign-types v0.3.2
[INFO] [stderr]    Compiling tinyvec v1.5.1
[INFO] [stderr]    Compiling openssl-src v300.0.2+3.0.0
[INFO] [stderr]    Compiling pest v2.1.3
[INFO] [stderr]    Compiling form_urlencoded v1.0.1
[INFO] [stderr]    Compiling unicase v2.6.0
[INFO] [stderr]    Compiling proc-macro-error-attr v1.0.4
[INFO] [stderr]    Compiling proc-macro-error v1.0.4
[INFO] [stderr]    Compiling http v0.2.5
[INFO] [stderr]    Compiling humantime v1.3.0
[INFO] [stderr]    Compiling heck v0.3.3
[INFO] [stderr]    Compiling tracing v0.1.29
[INFO] [stderr]    Compiling openssl-sys v0.9.70
[INFO] [stderr]    Compiling want v0.3.0
[INFO] [stderr]    Compiling aho-corasick v0.7.18
[INFO] [stderr]    Compiling bstr v0.2.17
[INFO] [stderr]    Compiling linkify v0.7.0
[INFO] [stderr]    Compiling pest_meta v2.1.3
[INFO] [stderr]    Compiling quote v1.0.10
[INFO] [stderr]    Compiling mio v0.7.14
[INFO] [stderr]    Compiling num_cpus v1.13.0
[INFO] [stderr]    Compiling atty v0.2.14
[INFO] [stderr]    Compiling getrandom v0.2.3
[INFO] [stderr]    Compiling socket2 v0.4.2
[INFO] [stderr]    Compiling time v0.1.43
[INFO] [stderr]    Compiling unicode-normalization v0.1.19
[INFO] [stderr]    Compiling clap v2.33.3
[INFO] [stderr]    Compiling rand_core v0.6.3
[INFO] [stderr]    Compiling opener v0.5.0
[INFO] [stderr]    Compiling regex v1.5.4
[INFO] [stderr]    Compiling http-body v0.4.4
[INFO] [stderr]    Compiling rand_chacha 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-1.0.81/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"' --cfg 'feature="visit"' -C metadata=52696b291cb625cb -C extra-filename=-52696b291cb625cb --out-dir /opt/rustwide/target/debug/deps -L dependency=/opt/rustwide/target/debug/deps --extern proc_macro2=/opt/rustwide/target/debug/deps/libproc_macro2-d65edc41d607e03c.rmeta --extern quote=/opt/rustwide/target/debug/deps/libquote-dbc5145a58f6829f.rmeta --extern unicode_xid=/opt/rustwide/target/debug/deps/libunicode_xid-8263bf01b14079a2.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] running `Command { std: "docker" "inspect" "8df35ed4086c1c935ac38ee15a989a64033dbebc8d0ccdfeb71c2120fdb5ae2f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "8df35ed4086c1c935ac38ee15a989a64033dbebc8d0ccdfeb71c2120fdb5ae2f", kill_on_drop: false }`
[INFO] [stdout] 8df35ed4086c1c935ac38ee15a989a64033dbebc8d0ccdfeb71c2120fdb5ae2f