[INFO] fetching crate preexplorer 0.4.1...
[INFO] testing preexplorer-0.4.1 against beta-2021-09-08 for beta-1.56-1
[INFO] extracting crate preexplorer 0.4.1 into /workspace/builds/worker-76/source
[INFO] validating manifest of crates.io crate preexplorer 0.4.1 on toolchain beta-2021-09-08
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2021-09-08" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate preexplorer 0.4.1
[INFO] finished tweaking crates.io crate preexplorer 0.4.1
[INFO] tweaked toml for crates.io crate preexplorer 0.4.1 written to /workspace/builds/worker-76/source/Cargo.toml
[INFO] crate crates.io crate preexplorer 0.4.1 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2021-09-08" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-76/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-76/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:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2021-09-08" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] bb6c714630ca2ce344d62721f6bb5fddc3a8c3f17d837ad0a29dbd6a73841227
[INFO] running `Command { std: "docker" "start" "-a" "bb6c714630ca2ce344d62721f6bb5fddc3a8c3f17d837ad0a29dbd6a73841227", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "bb6c714630ca2ce344d62721f6bb5fddc3a8c3f17d837ad0a29dbd6a73841227", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "bb6c714630ca2ce344d62721f6bb5fddc3a8c3f17d837ad0a29dbd6a73841227", kill_on_drop: false }`
[INFO] [stdout] bb6c714630ca2ce344d62721f6bb5fddc3a8c3f17d837ad0a29dbd6a73841227
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-76/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-76/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=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:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2021-09-08" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] fcd0ba4725db8a1d7751d984b372c353bd386f7f321cf7c48d7e6ed24f0b0d3f
[INFO] running `Command { std: "docker" "start" "-a" "fcd0ba4725db8a1d7751d984b372c353bd386f7f321cf7c48d7e6ed24f0b0d3f", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.24
[INFO] [stderr]    Compiling unicode-xid v0.2.1
[INFO] [stderr]    Compiling version_check v0.9.2
[INFO] [stderr]    Compiling syn v1.0.58
[INFO] [stderr]    Compiling libc v0.2.81
[INFO] [stderr]    Compiling ndarray v0.13.1
[INFO] [stderr]    Compiling custom_derive v0.1.7
[INFO] [stderr]    Compiling float-ord v0.2.0
[INFO] [stderr]    Compiling num-complex v0.2.4
[INFO] [stderr]    Compiling matrixmultiply v0.2.4
[INFO] [stderr]    Compiling conv v0.3.3
[INFO] [stderr]    Compiling proc-macro-error-attr v1.0.4
[INFO] [stderr]    Compiling proc-macro-error v1.0.4
[INFO] [stderr]    Compiling average v0.10.6
[INFO] [stderr]    Compiling quote v1.0.8
[INFO] [stderr]    Compiling time v0.1.44
[INFO] [stderr]    Compiling chrono v0.4.19
[INFO] [stderr]    Compiling thiserror-impl v1.0.23
[INFO] [stderr]    Compiling getset v0.1.1
[INFO] [stderr]    Compiling thiserror v1.0.23
[INFO] [stderr]    Compiling preexplorer v0.4.1 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 9.40s
[INFO] running `Command { std: "docker" "inspect" "fcd0ba4725db8a1d7751d984b372c353bd386f7f321cf7c48d7e6ed24f0b0d3f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "fcd0ba4725db8a1d7751d984b372c353bd386f7f321cf7c48d7e6ed24f0b0d3f", kill_on_drop: false }`
[INFO] [stdout] fcd0ba4725db8a1d7751d984b372c353bd386f7f321cf7c48d7e6ed24f0b0d3f
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-76/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-76/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=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:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2021-09-08" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 48f4989d73a1cf93f52ef2ce609099c7978679acd613606e298da9e9b5dea791
[INFO] running `Command { std: "docker" "start" "-a" "48f4989d73a1cf93f52ef2ce609099c7978679acd613606e298da9e9b5dea791", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling anyhow v1.0.37
[INFO] [stderr]    Compiling itertools v0.9.0
[INFO] [stderr]    Compiling getrandom v0.1.16
[INFO] [stderr]    Compiling rand_core v0.5.1
[INFO] [stderr]    Compiling rand_chacha v0.2.2
[INFO] [stderr]    Compiling rand v0.7.3
[INFO] [stderr]    Compiling rand_distr v0.2.2
[INFO] [stderr]    Compiling preexplorer v0.4.1 (/opt/rustwide/workdir)
[INFO] [stderr] error: could not compile `preexplorer`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustc --crate-name preexplorer --edition=2018 src/lib.rs --error-format=json --json=diagnostic-rendered-ansi --emit=dep-info,link -C embed-bitcode=no -C debuginfo=2 --test -C metadata=609c252bac2659d9 -C extra-filename=-609c252bac2659d9 --out-dir /opt/rustwide/target/debug/deps -L dependency=/opt/rustwide/target/debug/deps --extern anyhow=/opt/rustwide/target/debug/deps/libanyhow-e1a8d6cd72a8fb50.rlib --extern average=/opt/rustwide/target/debug/deps/libaverage-2645788a10955fce.rlib --extern chrono=/opt/rustwide/target/debug/deps/libchrono-74336c85268eff6d.rlib --extern getset=/opt/rustwide/target/debug/deps/libgetset-c70a00cd499ed3b7.so --extern itertools=/opt/rustwide/target/debug/deps/libitertools-26ded0679b1c8c41.rlib --extern ndarray=/opt/rustwide/target/debug/deps/libndarray-4f98148e1842da8f.rlib --extern rand=/opt/rustwide/target/debug/deps/librand-b95aa00b3034828a.rlib --extern rand_distr=/opt/rustwide/target/debug/deps/librand_distr-4ae685846bc8cb7e.rlib --extern thiserror=/opt/rustwide/target/debug/deps/libthiserror-c52d939789d79cef.rlib --cap-lints=warn` (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" "48f4989d73a1cf93f52ef2ce609099c7978679acd613606e298da9e9b5dea791", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "48f4989d73a1cf93f52ef2ce609099c7978679acd613606e298da9e9b5dea791", kill_on_drop: false }`
[INFO] [stdout] 48f4989d73a1cf93f52ef2ce609099c7978679acd613606e298da9e9b5dea791