[INFO] fetching crate crates-index 0.18.8...
[INFO] checking crates-index-0.18.8 against master#9a42c6509d399fd205917ebce474b31315c5d3e9 for pr-97427
[INFO] extracting crate crates-index 0.18.8 into /workspace/builds/worker-7/source
[INFO] validating manifest of crates.io crate crates-index 0.18.8 on toolchain 9a42c6509d399fd205917ebce474b31315c5d3e9
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+9a42c6509d399fd205917ebce474b31315c5d3e9" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate crates-index 0.18.8
[INFO] finished tweaking crates.io crate crates-index 0.18.8
[INFO] tweaked toml for crates.io crate crates-index 0.18.8 written to /workspace/builds/worker-7/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+9a42c6509d399fd205917ebce474b31315c5d3e9" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+9a42c6509d399fd205917ebce474b31315c5d3e9" "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 smartstring v1.0.1
[INFO] [stderr]   Downloaded cap v0.1.0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/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" "+9a42c6509d399fd205917ebce474b31315c5d3e9" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 3bf79e300c2dcc885681d2cc551a4203995977dd94f44411907711deba4361c8
[INFO] running `Command { std: "docker" "start" "-a" "3bf79e300c2dcc885681d2cc551a4203995977dd94f44411907711deba4361c8", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "3bf79e300c2dcc885681d2cc551a4203995977dd94f44411907711deba4361c8", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "3bf79e300c2dcc885681d2cc551a4203995977dd94f44411907711deba4361c8", kill_on_drop: false }`
[INFO] [stdout] 3bf79e300c2dcc885681d2cc551a4203995977dd94f44411907711deba4361c8
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/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" "+9a42c6509d399fd205917ebce474b31315c5d3e9" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 03f9a764386d552419e58edd8da4655b3446b1b9761b4bb8e361ecd164d57c73
[INFO] running `Command { std: "docker" "start" "-a" "03f9a764386d552419e58edd8da4655b3446b1b9761b4bb8e361ecd164d57c73", kill_on_drop: false }`
[INFO] [stderr]    Compiling autocfg v1.1.0
[INFO] [stderr]    Compiling libc v0.2.126
[INFO] [stderr]    Compiling pkg-config v0.3.25
[INFO] [stderr]     Checking cfg-if v1.0.0
[INFO] [stderr]    Compiling crossbeam-utils v0.8.8
[INFO] [stderr]     Checking lazy_static v1.4.0
[INFO] [stderr]    Compiling serde v1.0.137
[INFO] [stderr]    Compiling proc-macro2 v1.0.39
[INFO] [stderr]     Checking tinyvec_macros v0.1.0
[INFO] [stderr]     Checking scopeguard v1.1.0
[INFO] [stderr]    Compiling unicode-ident v1.0.1
[INFO] [stderr]    Compiling rayon-core v1.9.3
[INFO] [stderr]     Checking matches v0.1.9
[INFO] [stderr]     Checking percent-encoding v2.1.0
[INFO] [stderr]    Compiling syn v1.0.96
[INFO] [stderr]    Compiling log v0.4.17
[INFO] [stderr]     Checking unicode-bidi v0.3.8
[INFO] [stderr]    Compiling version_check v0.9.4
[INFO] [stderr]    Compiling memchr v2.5.0
[INFO] [stderr]    Compiling semver v1.0.10
[INFO] [stderr]    Compiling serde_derive v1.0.137
[INFO] [stderr]    Compiling serde_json v1.0.81
[INFO] [stderr]     Checking bitflags v1.3.2
[INFO] [stderr]     Checking itoa v1.0.2
[INFO] [stderr]     Checking openssl-probe v0.1.5
[INFO] [stderr]     Checking either v1.6.1
[INFO] [stderr]     Checking static_assertions v1.1.0
[INFO] [stderr]     Checking ryu v1.0.10
[INFO] [stderr]     Checking rustc-hash v1.1.0
[INFO] [stderr]     Checking remove_dir_all v0.5.3
[INFO] [stderr]     Checking fastrand v1.7.0
[INFO] [stderr]     Checking home v0.5.3
[INFO] [stderr]     Checking cap v0.1.0
[INFO] [stderr]     Checking tinyvec v1.6.0
[INFO] [stderr]    Compiling memoffset v0.6.5
[INFO] [stderr]    Compiling crossbeam-epoch v0.9.8
[INFO] [stderr]    Compiling rayon v1.5.3
[INFO] [stderr]     Checking form_urlencoded v1.0.1
[INFO] [stderr]    Compiling smartstring v1.0.1
[INFO] [stderr]     Checking unicode-normalization v0.1.19
[INFO] [stderr]     Checking crossbeam-channel v0.5.4
[INFO] [stderr]     Checking idna v0.2.3
[INFO] [stderr]     Checking hex v0.4.3
[INFO] [stderr]    Compiling quote v1.0.18
[INFO] [stderr]    Compiling jobserver v0.1.24
[INFO] [stderr]    Compiling cc v1.0.73
[INFO] [stderr]     Checking crossbeam-deque v0.8.1
[INFO] [stderr]     Checking num_cpus v1.13.1
[INFO] [stderr]     Checking tempfile v3.3.0
[INFO] [stderr]     Checking url v2.2.2
[INFO] [stderr]    Compiling libz-sys v1.1.8
[INFO] [stderr]    Compiling openssl-sys v0.9.74
[INFO] [stderr]    Compiling libssh2-sys v0.2.23
[INFO] [stderr]    Compiling libgit2-sys v0.13.4+1.4.2
[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-1.0.96/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="parsing"' --cfg 'feature="printing"' --cfg 'feature="proc-macro"' --cfg 'feature="quote"' -C metadata=fd83dec369ea682f -C extra-filename=-fd83dec369ea682f --out-dir /opt/rustwide/target/debug/deps -L dependency=/opt/rustwide/target/debug/deps --extern proc_macro2=/opt/rustwide/target/debug/deps/libproc_macro2-73ef3ed025fea9ce.rmeta --extern quote=/opt/rustwide/target/debug/deps/libquote-a21aa8320adf1b40.rmeta --extern unicode_ident=/opt/rustwide/target/debug/deps/libunicode_ident-2d8bc6a785d80132.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" "03f9a764386d552419e58edd8da4655b3446b1b9761b4bb8e361ecd164d57c73", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "03f9a764386d552419e58edd8da4655b3446b1b9761b4bb8e361ecd164d57c73", kill_on_drop: false }`
[INFO] [stdout] 03f9a764386d552419e58edd8da4655b3446b1b9761b4bb8e361ecd164d57c73