[INFO] fetching crate below-store 0.4.1...
[INFO] building below-store-0.4.1 against master#a7f375789bab1a4e4a291c963081a8ca7d2b6bd7 for pr-93180
[INFO] extracting crate below-store 0.4.1 into /workspace/builds/worker-34/source
[INFO] validating manifest of crates.io crate below-store 0.4.1 on toolchain a7f375789bab1a4e4a291c963081a8ca7d2b6bd7
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+a7f375789bab1a4e4a291c963081a8ca7d2b6bd7" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate below-store 0.4.1
[INFO] finished tweaking crates.io crate below-store 0.4.1
[INFO] tweaked toml for crates.io crate below-store 0.4.1 written to /workspace/builds/worker-34/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+a7f375789bab1a4e4a291c963081a8ca7d2b6bd7" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+a7f375789bab1a4e4a291c963081a8ca7d2b6bd7" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr] warning: version requirement `=0.8.0+zstd.1.4.9` for dependency `zstd` includes semver metadata which will be ignored, removing the metadata is recommended to avoid confusion
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-34/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-34/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@sha256:0cd99ca24d8e8c98e67c542213511d985b8778b5bdcbb160e038429496686047" "/opt/rustwide/cargo-home/bin/cargo" "+a7f375789bab1a4e4a291c963081a8ca7d2b6bd7" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 5c65ec5686b35a874862d04dd9af51f9b5f5bdf2ac10aaff9b0b8016459d03d4
[INFO] running `Command { std: "docker" "start" "-a" "5c65ec5686b35a874862d04dd9af51f9b5f5bdf2ac10aaff9b0b8016459d03d4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "5c65ec5686b35a874862d04dd9af51f9b5f5bdf2ac10aaff9b0b8016459d03d4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "5c65ec5686b35a874862d04dd9af51f9b5f5bdf2ac10aaff9b0b8016459d03d4", kill_on_drop: false }`
[INFO] [stdout] 5c65ec5686b35a874862d04dd9af51f9b5f5bdf2ac10aaff9b0b8016459d03d4
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-34/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-34/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@sha256:0cd99ca24d8e8c98e67c542213511d985b8778b5bdcbb160e038429496686047" "/opt/rustwide/cargo-home/bin/cargo" "+a7f375789bab1a4e4a291c963081a8ca7d2b6bd7" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 967b2d304a6d2e68711e07ac9a8a64ea1032f2627b9ae80cf8c49bfdb8df7532
[INFO] running `Command { std: "docker" "start" "-a" "967b2d304a6d2e68711e07ac9a8a64ea1032f2627b9ae80cf8c49bfdb8df7532", kill_on_drop: false }`
[INFO] [stderr] warning: version requirement `=0.8.0+zstd.1.4.9` for dependency `zstd` includes semver metadata which will be ignored, removing the metadata is recommended to avoid confusion
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling libc v0.2.116
[INFO] [stderr]    Compiling syn v1.0.86
[INFO] [stderr]    Compiling serde v1.0.136
[INFO] [stderr]    Compiling log v0.4.14
[INFO] [stderr]    Compiling ident_case v1.0.1
[INFO] [stderr]    Compiling strsim v0.9.3
[INFO] [stderr]    Compiling lazy_static v1.4.0
[INFO] [stderr]    Compiling proc-macro2 v1.0.36
[INFO] [stderr]    Compiling once_cell v1.9.0
[INFO] [stderr]    Compiling erased-serde v0.3.18
[INFO] [stderr]    Compiling version_check v0.9.4
[INFO] [stderr]    Compiling parking_lot_core v0.8.5
[INFO] [stderr]    Compiling crossbeam-utils v0.8.6
[INFO] [stderr]    Compiling memchr v2.4.1
[INFO] [stderr]    Compiling smallvec v1.8.0
[INFO] [stderr]    Compiling scopeguard v1.1.0
[INFO] [stderr]    Compiling slog v2.7.0
[INFO] [stderr]    Compiling anyhow v1.0.53
[INFO] [stderr]    Compiling array-macro v1.0.5
[INFO] [stderr]    Compiling stable_deref_trait v1.2.0
[INFO] [stderr]    Compiling signal-hook v0.3.13
[INFO] [stderr]    Compiling numtoa v0.1.0
[INFO] [stderr]    Compiling xi-unicode v0.3.0
[INFO] [stderr]    Compiling serde_json v1.0.78
[INFO] [stderr]    Compiling zstd-safe v4.0.0+zstd.1.4.9
[INFO] [stderr]    Compiling regex-syntax v0.6.25
[INFO] [stderr]    Compiling same-file v1.0.6
[INFO] [stderr]    Compiling match_cfg v0.1.0
[INFO] [stderr]    Compiling itoa v1.0.1
[INFO] [stderr]    Compiling humantime v2.1.0
[INFO] [stderr]    Compiling half v1.8.2
[INFO] [stderr]    Compiling maplit v1.0.2
[INFO] [stderr]    Compiling static_assertions v1.1.0
[INFO] [stderr]    Compiling num-traits v0.2.14
[INFO] [stderr]    Compiling num-integer v0.1.44
[INFO] [stderr]    Compiling memoffset v0.6.5
[INFO] [stderr]    Compiling num-rational v0.3.2
[INFO] [stderr]    Compiling num-iter v0.1.42
[INFO] [stderr]    Compiling instant v0.1.12
[INFO] [stderr]    Compiling jobserver v0.1.24
[INFO] [stderr]    Compiling lock_api v0.4.6
[INFO] [stderr]    Compiling thread_local v1.1.4
[INFO] [stderr]    Compiling owning_ref v0.4.1
[INFO] [stderr]    Compiling walkdir v2.3.2
[INFO] [stderr]    Compiling ahash v0.6.3
[INFO] [stderr]    Compiling cc v1.0.72
[INFO] [stderr]    Compiling crossbeam-channel v0.5.2
[INFO] [stderr]    Compiling aho-corasick v0.7.18
[INFO] [stderr]    Compiling zstd-sys v1.5.0+zstd.1.4.9
[INFO] [stderr]    Compiling num-complex v0.3.1
[INFO] [stderr]    Compiling quote v1.0.15
[INFO] [stderr]    Compiling regex v1.5.4
[INFO] [stderr]    Compiling time v0.1.43
[INFO] [stderr]    Compiling signal-hook-registry v1.4.0
[INFO] [stderr]    Compiling mio v0.7.14
[INFO] [stderr]    Compiling dirs-sys-next v0.1.2
[INFO] [stderr]    Compiling getrandom v0.2.4
[INFO] [stderr]    Compiling openat v0.1.21
[INFO] [stderr]    Compiling num_cpus v1.13.1
[INFO] [stderr]    Compiling nix v0.22.3
[INFO] [stderr]    Compiling atty v0.2.14
[INFO] [stderr]    Compiling termion v1.5.6
[INFO] [stderr]    Compiling hostname v0.3.1
[INFO] [stderr]    Compiling memmap v0.7.0
[INFO] [stderr]    Compiling num v0.3.1
[INFO] [stderr]    Compiling parking_lot v0.11.2
[INFO] [stderr]    Compiling dirs-next v2.0.0
[INFO] [stderr]    Compiling term v0.7.0
[INFO] [stderr]    Compiling threadpool v1.8.1
[INFO] [stderr]    Compiling signal-hook v0.1.17
[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-1.0.86/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="fold"' --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=b7694fbbc2025220 -C extra-filename=-b7694fbbc2025220 --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-4040e84c0ddb8645.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] [stderr] error: build failed
[INFO] running `Command { std: "docker" "inspect" "967b2d304a6d2e68711e07ac9a8a64ea1032f2627b9ae80cf8c49bfdb8df7532", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "967b2d304a6d2e68711e07ac9a8a64ea1032f2627b9ae80cf8c49bfdb8df7532", kill_on_drop: false }`
[INFO] [stdout] 967b2d304a6d2e68711e07ac9a8a64ea1032f2627b9ae80cf8c49bfdb8df7532