[INFO] fetching crate nest 1.0.0...
[INFO] building nest-1.0.0 against master#222c5724ecc922fe67815f428c19f82c129d9386 for pr-97334
[INFO] extracting crate nest 1.0.0 into /workspace/builds/worker-18/source
[INFO] validating manifest of crates.io crate nest 1.0.0 on toolchain 222c5724ecc922fe67815f428c19f82c129d9386
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+222c5724ecc922fe67815f428c19f82c129d9386" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate nest 1.0.0
[INFO] finished tweaking crates.io crate nest 1.0.0
[INFO] tweaked toml for crates.io crate nest 1.0.0 written to /workspace/builds/worker-18/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+222c5724ecc922fe67815f428c19f82c129d9386" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+222c5724ecc922fe67815f428c19f82c129d9386" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded assert_fs v0.11.3
[INFO] [stderr]   Downloaded globwalk v0.5.0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-18/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-18/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:ac0d0aa6ec8ed129e241004a6179c99fa0d2616f50ba759c5b60bd26d0fafa02" "/opt/rustwide/cargo-home/bin/cargo" "+222c5724ecc922fe67815f428c19f82c129d9386" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 7300e9f990ee89d989146039e1dd60e70b370700e643761519216c2e9f7bf717
[INFO] running `Command { std: "docker" "start" "-a" "7300e9f990ee89d989146039e1dd60e70b370700e643761519216c2e9f7bf717", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "7300e9f990ee89d989146039e1dd60e70b370700e643761519216c2e9f7bf717", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "7300e9f990ee89d989146039e1dd60e70b370700e643761519216c2e9f7bf717", kill_on_drop: false }`
[INFO] [stdout] 7300e9f990ee89d989146039e1dd60e70b370700e643761519216c2e9f7bf717
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-18/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-18/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" "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:ac0d0aa6ec8ed129e241004a6179c99fa0d2616f50ba759c5b60bd26d0fafa02" "/opt/rustwide/cargo-home/bin/cargo" "+222c5724ecc922fe67815f428c19f82c129d9386" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] e02157e54dda39f24fdcfad1c86038794dcf6595c18e1db487ff3e090c2c770f
[INFO] running `Command { std: "docker" "start" "-a" "e02157e54dda39f24fdcfad1c86038794dcf6595c18e1db487ff3e090c2c770f", kill_on_drop: false }`
[INFO] [stderr]    Compiling autocfg v1.1.0
[INFO] [stderr]    Compiling memchr v2.5.0
[INFO] [stderr]    Compiling libc v0.2.126
[INFO] [stderr]    Compiling proc-macro2 v0.4.30
[INFO] [stderr]    Compiling serde v1.0.137
[INFO] [stderr]    Compiling unicode-xid v0.1.0
[INFO] [stderr]    Compiling syn v0.15.44
[INFO] [stderr]    Compiling cc v1.0.73
[INFO] [stderr]    Compiling hashbrown v0.11.2
[INFO] [stderr]    Compiling nix v0.14.1
[INFO] [stderr]    Compiling serde v0.8.23
[INFO] [stderr]    Compiling adler v1.0.2
[INFO] [stderr]    Compiling gimli v0.26.1
[INFO] [stderr]    Compiling cfg-if v1.0.0
[INFO] [stderr]    Compiling serde_json v1.0.81
[INFO] [stderr]    Compiling ryu v1.0.10
[INFO] [stderr]    Compiling log v0.4.17
[INFO] [stderr]    Compiling bitflags v1.3.2
[INFO] [stderr]    Compiling rustc-demangle v0.1.21
[INFO] [stderr]    Compiling regex-syntax v0.6.26
[INFO] [stderr]    Compiling void v1.0.2
[INFO] [stderr]    Compiling cfg-if v0.1.10
[INFO] [stderr]    Compiling linked-hash-map v0.5.4
[INFO] [stderr]    Compiling remove_dir_all v0.5.3
[INFO] [stderr]    Compiling itoa v1.0.2
[INFO] [stderr]    Compiling lazy_static v1.4.0
[INFO] [stderr]    Compiling objekt v0.1.2
[INFO] [stderr]    Compiling mkdirp v0.1.0
[INFO] [stderr]    Compiling miniz_oxide v0.5.3
[INFO] [stderr]    Compiling yaml-rust v0.4.5
[INFO] [stderr]    Compiling indexmap v1.8.2
[INFO] [stderr]    Compiling num-traits v0.2.15
[INFO] [stderr]    Compiling aho-corasick v0.7.18
[INFO] [stderr]    Compiling object v0.28.4
[INFO] [stderr]    Compiling quote v0.6.13
[INFO] [stderr]    Compiling backtrace v0.3.65
[INFO] [stderr]    Compiling rand v0.4.6
[INFO] [stderr]    Compiling serde_test v0.8.23
[INFO] [stderr]    Compiling tempdir v0.3.7
[INFO] [stderr]    Compiling linked-hash-map v0.3.0
[INFO] [stderr]    Compiling num-traits v0.1.43
[INFO] [stderr]    Compiling regex v1.5.6
[INFO] [stderr]    Compiling addr2line v0.17.0
[INFO] [stderr]    Compiling serde-hjson v0.9.1
[INFO] [stderr]    Compiling atomicwrites v0.2.5
[INFO] [stderr]    Compiling serde_yaml v0.8.24
[INFO] [stderr]    Compiling toml v0.5.9
[INFO] [stderr] error: could not compile `syn`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustc --crate-name syn /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/syn-0.15.44/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=aae6a56c695dd25f -C extra-filename=-aae6a56c695dd25f --out-dir /opt/rustwide/target/debug/deps -L dependency=/opt/rustwide/target/debug/deps --extern proc_macro2=/opt/rustwide/target/debug/deps/libproc_macro2-e1d91882f7b20965.rmeta --extern quote=/opt/rustwide/target/debug/deps/libquote-c4bf9bb4faa2e7a1.rmeta --extern unicode_xid=/opt/rustwide/target/debug/deps/libunicode_xid-17df5e5ca0bb5bda.rmeta --cap-lints allow --cap-lints=forbid --cfg syn_can_match_trailing_dollar --cfg syn_can_use_thread_id --cfg syn_can_use_associated_constants --cfg syn_can_call_macro_by_path` (signal: 9, SIGKILL: kill)
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] running `Command { std: "docker" "inspect" "e02157e54dda39f24fdcfad1c86038794dcf6595c18e1db487ff3e090c2c770f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e02157e54dda39f24fdcfad1c86038794dcf6595c18e1db487ff3e090c2c770f", kill_on_drop: false }`
[INFO] [stdout] e02157e54dda39f24fdcfad1c86038794dcf6595c18e1db487ff3e090c2c770f