[INFO] fetching crate postform_serial 0.5.0...
[INFO] documenting postform_serial-0.5.0 against try#6ee483316d2e4581572121d60a955affb2032eb3+cargoflags=-Zrustdoc-scrape-examples for scrape-examples
[INFO] extracting crate postform_serial 0.5.0 into /workspace/builds/worker-2/source
[INFO] validating manifest of crates.io crate postform_serial 0.5.0 on toolchain 6ee483316d2e4581572121d60a955affb2032eb3
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+6ee483316d2e4581572121d60a955affb2032eb3" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate postform_serial 0.5.0
[INFO] finished tweaking crates.io crate postform_serial 0.5.0
[INFO] tweaked toml for crates.io crate postform_serial 0.5.0 written to /workspace/builds/worker-2/source/Cargo.toml
[INFO] crate crates.io crate postform_serial 0.5.0 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+6ee483316d2e4581572121d60a955affb2032eb3" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[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:bb5b0feb4f87116a4ea905b7ff5bf5b85913db05e9f0fbc1abdd3168928d9075" "/opt/rustwide/cargo-home/bin/cargo" "+6ee483316d2e4581572121d60a955affb2032eb3" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] c152217fe6db1ff199e010acfb3649c3f3691772e9f1bd6964722e2c45423755
[INFO] running `Command { std: "docker" "start" "-a" "c152217fe6db1ff199e010acfb3649c3f3691772e9f1bd6964722e2c45423755", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "c152217fe6db1ff199e010acfb3649c3f3691772e9f1bd6964722e2c45423755", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c152217fe6db1ff199e010acfb3649c3f3691772e9f1bd6964722e2c45423755", kill_on_drop: false }`
[INFO] [stdout] c152217fe6db1ff199e010acfb3649c3f3691772e9f1bd6964722e2c45423755
[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=forbid" "-e" "RUSTDOCFLAGS=--cap-lints=forbid" "-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:bb5b0feb4f87116a4ea905b7ff5bf5b85913db05e9f0fbc1abdd3168928d9075" "/opt/rustwide/cargo-home/bin/cargo" "+6ee483316d2e4581572121d60a955affb2032eb3" "doc" "--frozen" "--no-deps" "--document-private-items" "--message-format=json" "-Zrustdoc-scrape-examples", kill_on_drop: false }`
[INFO] [stdout] 4c894a718da17c6c980f740966514610ec622bbbf0bf2a12c5cda28d3595be1f
[INFO] running `Command { std: "docker" "start" "-a" "4c894a718da17c6c980f740966514610ec622bbbf0bf2a12c5cda28d3595be1f", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.36
[INFO] [stderr]    Compiling unicode-xid v0.2.2
[INFO] [stderr]    Compiling libc v0.2.121
[INFO] [stderr]    Compiling version_check v0.9.4
[INFO] [stderr]    Compiling syn v1.0.89
[INFO] [stderr]     Checking cfg-if v1.0.0
[INFO] [stderr]    Compiling autocfg v1.1.0
[INFO] [stderr]    Compiling memchr v2.4.1
[INFO] [stderr]     Checking lazy_static v1.4.0
[INFO] [stderr]    Compiling log v0.4.16
[INFO] [stderr]    Compiling glob v0.3.0
[INFO] [stderr]    Compiling regex-syntax v0.6.25
[INFO] [stderr]     Checking once_cell v1.10.0
[INFO] [stderr]    Compiling unicode-width v0.1.9
[INFO] [stderr]     Checking adler v1.0.2
[INFO] [stderr]     Checking bitflags v1.3.2
[INFO] [stderr]    Compiling textwrap v0.11.0
[INFO] [stderr]     Checking tracing-core v0.1.23
[INFO] [stderr]    Compiling libloading v0.7.3
[INFO] [stderr]    Compiling ansi_term v0.12.1
[INFO] [stderr]    Compiling strsim v0.8.0
[INFO] [stderr]    Compiling unicode-segmentation v1.9.0
[INFO] [stderr]    Compiling pkg-config v0.3.24
[INFO] [stderr]    Compiling termcolor v1.1.3
[INFO] [stderr]    Compiling vec_map v0.8.2
[INFO] [stderr]    Compiling nom v5.1.2
[INFO] [stderr]    Compiling proc-macro-error-attr v1.0.4
[INFO] [stderr]    Compiling humantime v2.1.0
[INFO] [stderr]    Compiling crc32fast v1.3.2
[INFO] [stderr]    Compiling miniz_oxide v0.4.4
[INFO] [stderr]    Compiling bindgen v0.57.0
[INFO] [stderr]    Compiling clang-sys v1.3.1
[INFO] [stderr]    Compiling heck v0.3.3
[INFO] [stderr]    Compiling memoffset v0.6.5
[INFO] [stderr]    Compiling proc-macro-error v1.0.4
[INFO] [stderr]     Checking thread_local v1.1.4
[INFO] [stderr]     Checking sharded-slab v0.1.4
[INFO] [stderr]    Compiling quote v1.0.17
[INFO] [stderr]    Compiling aho-corasick v0.7.18
[INFO] [stderr]    Compiling lazycell v1.3.0
[INFO] [stderr]    Compiling shlex v0.1.1
[INFO] [stderr]    Compiling cc v1.0.73
[INFO] [stderr]    Compiling peeking_take_while v0.1.2
[INFO] [stderr]     Checking pin-project-lite v0.2.8
[INFO] [stderr]    Compiling rustc-hash v1.1.0
[INFO] [stderr]    Compiling atty v0.2.14
[INFO] [stderr]    Compiling libudev-sys v0.1.4
[INFO] [stderr]    Compiling clap v2.34.0
[INFO] [stderr]    Compiling which v3.1.1
[INFO] [stderr]    Compiling nix v0.16.1
[INFO] [stderr]     Checking gimli v0.26.1
[INFO] [stderr]    Compiling eyre v0.6.7
[INFO] [stderr]     Checking object v0.27.1
[INFO] [stderr]     Checking tracing-subscriber v0.2.25
[INFO] [stderr]     Checking flate2 v1.0.22
[INFO] [stderr]     Checking rustc-demangle v0.1.21
[INFO] [stderr]     Checking wasmparser v0.57.0
[INFO] [stderr]    Compiling regex v1.5.5
[INFO] [stderr]     Checking void v1.0.2
[INFO] [stderr]     Checking owo-colors v1.3.0
[INFO] [stderr]     Checking indenter v0.3.3
[INFO] [stderr]     Checking cfg-if v0.1.10
[INFO] [stderr]     Checking libudev v0.2.0
[INFO] [stderr]     Checking colored v2.0.0
[INFO] [stderr]     Checking nix v0.23.1
[INFO] [stderr]     Checking byteorder v1.4.3
[INFO] [stderr]     Checking leb128 v0.2.5
[INFO] [stderr]     Checking object v0.22.0
[INFO] [stderr]    Compiling backtrace v0.3.64
[INFO] [stderr]    Compiling cexpr v0.4.0
[INFO] [stderr]     Checking rcobs v0.1.1
[INFO] [stderr]    Compiling env_logger v0.8.4
[INFO] [stderr]     Checking addr2line v0.17.0
[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-1.0.89/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="extra-traits"' --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=b06bf8f838c9dd4f -C extra-filename=-b06bf8f838c9dd4f --out-dir /opt/rustwide/target/debug/deps -L dependency=/opt/rustwide/target/debug/deps --extern proc_macro2=/opt/rustwide/target/debug/deps/libproc_macro2-d937f1f82ffb437d.rmeta --extern quote=/opt/rustwide/target/debug/deps/libquote-57c1be8c4f14b3a1.rmeta --extern unicode_xid=/opt/rustwide/target/debug/deps/libunicode_xid-3c8a88541efd8c80.rmeta --cap-lints allow --cap-lints=forbid` (signal: 9, SIGKILL: kill)
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] running `Command { std: "docker" "inspect" "4c894a718da17c6c980f740966514610ec622bbbf0bf2a12c5cda28d3595be1f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "4c894a718da17c6c980f740966514610ec622bbbf0bf2a12c5cda28d3595be1f", kill_on_drop: false }`
[INFO] [stdout] 4c894a718da17c6c980f740966514610ec622bbbf0bf2a12c5cda28d3595be1f