[INFO] fetching crate perkv 0.0.2...
[INFO] testing perkv-0.0.2 against 1.49.0 for beta-1.50-1
[INFO] extracting crate perkv 0.0.2 into /workspace/builds/worker-11/source
[INFO] validating manifest of crates.io crate perkv 0.0.2 on toolchain 1.49.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.49.0" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking crates.io crate perkv 0.0.2
[INFO] finished tweaking crates.io crate perkv 0.0.2
[INFO] tweaked toml for crates.io crate perkv 0.0.2 written to /workspace/builds/worker-11/source/Cargo.toml
[INFO] crate crates.io crate perkv 0.0.2 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.49.0" "fetch" "--locked" "--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-11/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-11/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" "rustops/crates-build-env@sha256:b8eeb62f26c39b23691079a6cb6de528d8e88b4d71a8f6b1d30f8ba7d9c16de9" "/opt/rustwide/cargo-home/bin/cargo" "+1.49.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] ffe317a590f63e01cc030027b2a51db9fa75e2878d2b04959cdd2615e1f8403e
[INFO] running `Command { std: "docker" "start" "-a" "ffe317a590f63e01cc030027b2a51db9fa75e2878d2b04959cdd2615e1f8403e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "ffe317a590f63e01cc030027b2a51db9fa75e2878d2b04959cdd2615e1f8403e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ffe317a590f63e01cc030027b2a51db9fa75e2878d2b04959cdd2615e1f8403e", kill_on_drop: false }`
[INFO] [stdout] ffe317a590f63e01cc030027b2a51db9fa75e2878d2b04959cdd2615e1f8403e
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-11/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-11/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" "rustops/crates-build-env@sha256:b8eeb62f26c39b23691079a6cb6de528d8e88b4d71a8f6b1d30f8ba7d9c16de9" "/opt/rustwide/cargo-home/bin/cargo" "+1.49.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] f6ff9661ae0075143db9976b771d234b65927fb6d5813151364c618d782e1613
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "f6ff9661ae0075143db9976b771d234b65927fb6d5813151364c618d782e1613", kill_on_drop: false }`
[INFO] [stderr]    Compiling byteorder v1.3.2
[INFO] [stderr]    Compiling syn v0.15.44
[INFO] [stderr]    Compiling autocfg v0.1.6
[INFO] [stderr]    Compiling unsigned-varint v0.2.3
[INFO] [stderr]    Compiling data-encoding v2.1.2
[INFO] [stderr]    Compiling linked-hash-map v0.5.2
[INFO] [stderr]    Compiling c2-chacha v0.2.2
[INFO] [stderr]    Compiling getrandom v0.1.12
[INFO] [stderr]    Compiling fs2 v0.4.3
[INFO] [stderr]    Compiling rand_core v0.5.1
[INFO] [stderr]    Compiling bincode v1.2.0
[INFO] [stderr]    Compiling rand_chacha v0.2.1
[INFO] [stderr]    Compiling rand v0.7.2
[INFO] [stderr]    Compiling persy v0.7.0
[INFO] [stderr]    Compiling delegate v0.3.0
[INFO] [stderr]    Compiling persawkv v0.0.0-alpha.1
[INFO] [stderr]    Compiling perkv v0.0.2 (/opt/rustwide/workdir)
[INFO] [stderr] error: could not compile `persy`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustc --crate-name persy --edition=2018 /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/persy-0.7.0/src/lib.rs --error-format=json --json=diagnostic-rendered-ansi,artifacts --crate-type lib --emit=dep-info,metadata,link -C embed-bitcode=no -C debuginfo=2 -C metadata=a2414a06460621e0 -C extra-filename=-a2414a06460621e0 --out-dir /opt/rustwide/target/debug/deps -L dependency=/opt/rustwide/target/debug/deps --extern byteorder=/opt/rustwide/target/debug/deps/libbyteorder-76ff728e7fb88045.rmeta --extern crc=/opt/rustwide/target/debug/deps/libcrc-a4e1a16bcb5e832a.rmeta --extern data_encoding=/opt/rustwide/target/debug/deps/libdata_encoding-d000d24e2db77e09.rmeta --extern fs2=/opt/rustwide/target/debug/deps/libfs2-ac3649670b3d15fd.rmeta --extern linked_hash_map=/opt/rustwide/target/debug/deps/liblinked_hash_map-375907ee5ab78d8f.rmeta --extern rand=/opt/rustwide/target/debug/deps/librand-8ac44fdee50f4f40.rmeta --extern unsigned_varint=/opt/rustwide/target/debug/deps/libunsigned_varint-57fbec763269ac94.rmeta --cap-lints allow --cap-lints=warn` (signal: 9, SIGKILL: kill)
[INFO] running `Command { std: "docker" "inspect" "f6ff9661ae0075143db9976b771d234b65927fb6d5813151364c618d782e1613", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f6ff9661ae0075143db9976b771d234b65927fb6d5813151364c618d782e1613", kill_on_drop: false }`
[INFO] [stdout] f6ff9661ae0075143db9976b771d234b65927fb6d5813151364c618d782e1613