[INFO] crate persy 0.9.0 is already in cache
[INFO] testing persy-0.9.0 against 1.44.0 for beta-1.45-1
[INFO] extracting crate persy 0.9.0 into /workspace/builds/worker-9/source
[INFO] validating manifest of crates.io crate persy 0.9.0 on toolchain 1.44.0
[INFO] running `"/workspace/cargo-home/bin/cargo" "+1.44.0" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking crates.io crate persy 0.9.0
[INFO] finished tweaking crates.io crate persy 0.9.0
[INFO] tweaked toml for crates.io crate persy 0.9.0 written to /workspace/builds/worker-9/source/Cargo.toml
[INFO] crate crates.io crate persy 0.9.0 already has a lockfile, it will not be regenerated
[INFO] running `"/workspace/cargo-home/bin/cargo" "+1.44.0" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/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" "MAP_USER_ID=0" "-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" "--network" "none" "rustops/crates-build-env" "/opt/rustwide/cargo-home/bin/cargo" "+1.44.0" "build" "--frozen"`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] d7a6cae627a8ab906635b16bb2dec569da883eaf0209065ea49f53028fc1bab8
[INFO] running `"docker" "start" "-a" "d7a6cae627a8ab906635b16bb2dec569da883eaf0209065ea49f53028fc1bab8"`
[INFO] [stderr] sudo: setrlimit(RLIMIT_CORE): Operation not permitted
[INFO] [stderr]    Compiling build_const v0.2.1
[INFO] [stderr]    Compiling unsigned-varint v0.3.1
[INFO] [stderr]    Compiling fs2 v0.4.3
[INFO] [stderr]    Compiling crc v1.8.1
[INFO] [stderr]    Compiling persy v0.9.0 (/opt/rustwide/workdir)
[INFO] [stderr] warning: unused return value of `std::vec::Vec::<T>::split_off` that must be used
[INFO] [stderr]    --> src/snapshot.rs:355:29
[INFO] [stderr]     |
[INFO] [stderr] 355 | ...                   v.split_off(index);
[INFO] [stderr]     |                       ^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_must_use)]` on by default
[INFO] [stderr]     = note: use `.truncate()` if you don't need the other half
[INFO] [stderr] 
[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 src/lib.rs --error-format=json --json=diagnostic-rendered-ansi --crate-type lib --emit=dep-info,metadata,link -C debuginfo=2 -C metadata=6f4b02cec3b69979 -C extra-filename=-6f4b02cec3b69979 --out-dir /opt/rustwide/target/debug/deps -L dependency=/opt/rustwide/target/debug/deps --extern byteorder=/opt/rustwide/target/debug/deps/libbyteorder-5cddd3c0738b32cd.rmeta --extern crc=/opt/rustwide/target/debug/deps/libcrc-3046d08d70772e6c.rmeta --extern data_encoding=/opt/rustwide/target/debug/deps/libdata_encoding-3eb5d4c14ead9616.rmeta --extern fs2=/opt/rustwide/target/debug/deps/libfs2-d492e5e01d25437a.rmeta --extern linked_hash_map=/opt/rustwide/target/debug/deps/liblinked_hash_map-275b9c70368059da.rmeta --extern rand=/opt/rustwide/target/debug/deps/librand-5e6ccde9817c649f.rmeta --extern unsigned_varint=/opt/rustwide/target/debug/deps/libunsigned_varint-1c91edf331ec7e86.rmeta --cap-lints=warn` (signal: 9, SIGKILL: kill)
[INFO] running `"docker" "inspect" "d7a6cae627a8ab906635b16bb2dec569da883eaf0209065ea49f53028fc1bab8"`
[INFO] running `"docker" "rm" "-f" "d7a6cae627a8ab906635b16bb2dec569da883eaf0209065ea49f53028fc1bab8"`
[INFO] [stdout] d7a6cae627a8ab906635b16bb2dec569da883eaf0209065ea49f53028fc1bab8