[INFO] cloning repository https://github.com/oxalica/cargo-gc-target
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/oxalica/cargo-gc-target" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Foxalica%2Fcargo-gc-target", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Foxalica%2Fcargo-gc-target'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 2f6e7498f6d1e28963ba8e387ceacc36ad54c504
[INFO] documenting oxalica/cargo-gc-target against 1.61.0 for beta-1.62-rustdoc-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Foxalica%2Fcargo-gc-target" "/workspace/builds/worker-25/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-25/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/oxalica/cargo-gc-target on toolchain 1.61.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.61.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/oxalica/cargo-gc-target
[INFO] finished tweaking git repo https://github.com/oxalica/cargo-gc-target
[INFO] tweaked toml for git repo https://github.com/oxalica/cargo-gc-target written to /workspace/builds/worker-25/source/Cargo.toml
[INFO] crate git repo https://github.com/oxalica/cargo-gc-target already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.61.0" "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 ignore v0.4.17
[INFO] [stderr]   Downloaded url v2.2.1
[INFO] [stderr]   Downloaded sized-chunks v0.6.4
[INFO] [stderr]   Downloaded bytesize v1.0.1
[INFO] [stderr]   Downloaded opener v0.4.1
[INFO] [stderr]   Downloaded crates-io v0.33.0
[INFO] [stderr]   Downloaded openssl v0.10.33
[INFO] [stderr]   Downloaded utf8parse v0.1.1
[INFO] [stderr]   Downloaded redox_syscall v0.2.5
[INFO] [stderr]   Downloaded strip-ansi-escapes v0.1.0
[INFO] [stderr]   Downloaded git2 v0.13.17
[INFO] [stderr]   Downloaded rustfix v0.5.1
[INFO] [stderr]   Downloaded semver v0.10.0
[INFO] [stderr]   Downloaded globset v0.4.6
[INFO] [stderr]   Downloaded bstr v0.2.15
[INFO] [stderr]   Downloaded idna v0.2.2
[INFO] [stderr]   Downloaded libc v0.2.91
[INFO] [stderr]   Downloaded libgit2-sys v0.12.18+1.1.0
[INFO] [stderr]   Downloaded vte v0.3.3
[INFO] [stderr]   Downloaded libnghttp2-sys v0.1.6+1.43.0
[INFO] [stderr]   Downloaded cargo v0.52.0
[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:d190cb871061d98bc6d0581d85cb2ecb09a0f8a142ba5463de30be9999fc3251" "/opt/rustwide/cargo-home/bin/cargo" "+1.61.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 30299182f89992d9530d0f815c883015a3793721db55cea4174efb7ba32d1323
[INFO] running `Command { std: "docker" "start" "-a" "30299182f89992d9530d0f815c883015a3793721db55cea4174efb7ba32d1323", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "30299182f89992d9530d0f815c883015a3793721db55cea4174efb7ba32d1323", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "30299182f89992d9530d0f815c883015a3793721db55cea4174efb7ba32d1323", kill_on_drop: false }`
[INFO] [stdout] 30299182f89992d9530d0f815c883015a3793721db55cea4174efb7ba32d1323
[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" "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:d190cb871061d98bc6d0581d85cb2ecb09a0f8a142ba5463de30be9999fc3251" "/opt/rustwide/cargo-home/bin/cargo" "+1.61.0" "doc" "--frozen" "--no-deps" "--document-private-items" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] f2b76d909f08879eb8fe8482d40a05fb3513a23b9f289b871a03042bbb80a73e
[INFO] running `Command { std: "docker" "start" "-a" "f2b76d909f08879eb8fe8482d40a05fb3513a23b9f289b871a03042bbb80a73e", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling libc v0.2.91
[INFO] [stderr]    Compiling pkg-config v0.3.19
[INFO] [stderr]     Checking cfg-if v1.0.0
[INFO] [stderr]    Compiling proc-macro2 v1.0.24
[INFO] [stderr]    Compiling syn v1.0.65
[INFO] [stderr]    Compiling version_check v0.9.3
[INFO] [stderr]    Compiling log v0.4.14
[INFO] [stderr]    Compiling crc32fast v1.2.1
[INFO] [stderr]    Compiling getrandom v0.2.2
[INFO] [stderr]    Compiling typenum v1.13.0
[INFO] [stderr]    Compiling anyhow v1.0.40
[INFO] [stderr]    Compiling curl v0.4.35
[INFO] [stderr]    Compiling serde_json v1.0.64
[INFO] [stderr]     Checking once_cell v1.7.2
[INFO] [stderr]    Compiling openssl v0.10.33
[INFO] [stderr]     Checking lazy_static v1.4.0
[INFO] [stderr]     Checking itoa v0.4.7
[INFO] [stderr]     Checking strsim v0.8.0
[INFO] [stderr]     Checking ucd-trie v0.1.3
[INFO] [stderr]     Checking vec_map v0.8.2
[INFO] [stderr]     Checking fnv v1.0.7
[INFO] [stderr]     Checking utf8parse v0.1.1
[INFO] [stderr]     Checking ansi_term v0.11.0
[INFO] [stderr]     Checking rand_core v0.5.1
[INFO] [stderr]     Checking termcolor v1.1.2
[INFO] [stderr]     Checking remove_dir_all v0.5.3
[INFO] [stderr]     Checking semver-parser v0.7.0
[INFO] [stderr]     Checking humantime v2.1.0
[INFO] [stderr]     Checking hex v0.3.2
[INFO] [stderr]     Checking rustc-workspace-hack v1.0.0
[INFO] [stderr]     Checking opener v0.4.1
[INFO] [stderr]     Checking home v0.5.3
[INFO] [stderr]     Checking bytesize v1.0.1
[INFO] [stderr]     Checking unicode-xid v0.2.1
[INFO] [stderr]     Checking shell-escape v0.1.5
[INFO] [stderr]     Checking glob v0.3.0
[INFO] [stderr]     Checking tinyvec v1.1.1
[INFO] [stderr]     Checking form_urlencoded v1.0.1
[INFO] [stderr]    Compiling crossbeam-utils v0.8.3
[INFO] [stderr]     Checking textwrap v0.11.0
[INFO] [stderr]     Checking bstr v0.2.15
[INFO] [stderr]     Checking regex v1.4.5
[INFO] [stderr]     Checking thread_local v1.1.3
[INFO] [stderr]    Compiling proc-macro-error-attr v1.0.4
[INFO] [stderr]    Compiling proc-macro-error v1.0.4
[INFO] [stderr]    Compiling im-rc v15.0.0
[INFO] [stderr]     Checking vte v0.3.3
[INFO] [stderr]     Checking pest v2.1.3
[INFO] [stderr]     Checking rand_xoshiro v0.4.0
[INFO] [stderr]     Checking strip-ansi-escapes v0.1.0
[INFO] [stderr]    Compiling jobserver v0.1.21
[INFO] [stderr]    Compiling filetime v0.2.14
[INFO] [stderr]    Compiling quote v1.0.9
[INFO] [stderr]     Checking unicode-normalization v0.1.17
[INFO] [stderr]     Checking socket2 v0.3.19
[INFO] [stderr]     Checking atty v0.2.14
[INFO] [stderr]     Checking num_cpus v1.13.0
[INFO] [stderr]     Checking globset v0.4.6
[INFO] [stderr]     Checking semver-parser v0.10.2
[INFO] [stderr]     Checking bitmaps v2.1.0
[INFO] [stderr]     Checking clap v2.33.3
[INFO] [stderr]     Checking env_logger v0.8.3
[INFO] [stderr]    Compiling tar v0.4.33
[INFO] [stderr]    Compiling cc v1.0.67
[INFO] [stderr]     Checking rand_core v0.6.2
[INFO] [stderr]     Checking ignore v0.4.17
[INFO] [stderr]     Checking semver v0.11.0
[INFO] [stderr]     Checking idna v0.2.2
[INFO] [stderr]     Checking sized-chunks v0.6.4
[INFO] [stderr]     Checking rand_chacha v0.3.0
[INFO] [stderr]     Checking url v2.2.1
[INFO] [stderr]     Checking rand v0.8.3
[INFO] [stderr]    Compiling libz-sys v1.1.2
[INFO] [stderr]    Compiling openssl-sys v0.9.61
[INFO] [stderr]    Compiling libnghttp2-sys v0.1.6+1.43.0
[INFO] [stderr]    Compiling curl-sys v0.4.41+curl-7.75.0
[INFO] [stderr]    Compiling libssh2-sys v0.2.21
[INFO] [stderr]    Compiling libgit2-sys v0.12.18+1.1.0
[INFO] [stderr]     Checking tempfile v3.2.0
[INFO] [stderr]    Compiling flate2 v1.0.20
[INFO] [stderr]    Compiling cargo v0.52.0
[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-1.0.65/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=313b4c43ea5a3ece -C extra-filename=-313b4c43ea5a3ece --out-dir /opt/rustwide/target/debug/deps -L dependency=/opt/rustwide/target/debug/deps --extern proc_macro2=/opt/rustwide/target/debug/deps/libproc_macro2-d2fb8bfa8ad64ed4.rmeta --extern quote=/opt/rustwide/target/debug/deps/libquote-75525ea3e4a61670.rmeta --extern unicode_xid=/opt/rustwide/target/debug/deps/libunicode_xid-b5509196166d98f1.rmeta --cap-lints allow --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" "f2b76d909f08879eb8fe8482d40a05fb3513a23b9f289b871a03042bbb80a73e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f2b76d909f08879eb8fe8482d40a05fb3513a23b9f289b871a03042bbb80a73e", kill_on_drop: false }`
[INFO] [stdout] f2b76d909f08879eb8fe8482d40a05fb3513a23b9f289b871a03042bbb80a73e