[INFO] updating cached repository https://github.com/Kerollmops/linear-regression
[INFO] running `"git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "-c" "remote.origin.fetch=refs/heads/*:refs/heads/*" "fetch" "origin" "--force" "--prune"`
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] d60cb04b6275682cfedf6833698a2c20cfb7e69f
[INFO] testing Kerollmops/linear-regression against 1.44.0 for beta-1.45-1
[INFO] running `"git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FKerollmops%2Flinear-regression" "/workspace/builds/worker-4/source"`
[INFO] [stderr] Cloning into '/workspace/builds/worker-4/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/Kerollmops/linear-regression on toolchain 1.44.0
[INFO] running `"/workspace/cargo-home/bin/cargo" "+1.44.0" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking git repo https://github.com/Kerollmops/linear-regression
[INFO] finished tweaking git repo https://github.com/Kerollmops/linear-regression
[INFO] tweaked toml for git repo https://github.com/Kerollmops/linear-regression written to /workspace/builds/worker-4/source/Cargo.toml
[INFO] crate git repo https://github.com/Kerollmops/linear-regression 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] [stderr] error: the lock file /workspace/builds/worker-4/source/Cargo.lock needs to be updated but --locked was passed to prevent this
[INFO] [stderr] If you want to try to generate the lock file without accessing the network, use the --offline flag.
[INFO] the lockfile is outdated, regenerating it
[INFO] running `"/workspace/cargo-home/bin/cargo" "+1.44.0" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[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-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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] 66bf2dead43be9a672e8e16207de28090e86825e037cf94d630e7caac97a0ef6
[INFO] running `"docker" "start" "-a" "66bf2dead43be9a672e8e16207de28090e86825e037cf94d630e7caac97a0ef6"`
[INFO] [stderr] sudo: setrlimit(RLIMIT_CORE): Operation not permitted
[INFO] [stderr]    Compiling gnuplot v0.0.18
[INFO] [stderr] error: enum is private and its variants cannot be re-exported
[INFO] [stderr]    --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/gnuplot-0.0.18/src/axes_common.rs:15:9
[INFO] [stderr]     |
[INFO] [stderr] 15  | pub use self::DataSourceType::*;
[INFO] [stderr]     |         ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] ...
[INFO] [stderr] 529 | enum DataSourceType
[INFO] [stderr]     | ------------------- help: consider making the enum public: `pub enum DataSourceType`
[INFO] [stderr] 
[INFO] [stderr] error: enum is private and its variants cannot be re-exported
[INFO] [stderr]   --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/gnuplot-0.0.18/src/figure.rs:15:9
[INFO] [stderr]    |
[INFO] [stderr] 15 | pub use self::AxesVariant::*;
[INFO] [stderr]    |         ^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 16 | 
[INFO] [stderr] 17 | enum AxesVariant
[INFO] [stderr]    | ---------------- help: consider making the enum public: `pub enum AxesVariant`
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to 2 previous errors
[INFO] [stderr] 
[INFO] [stderr] error: could not compile `gnuplot`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `"docker" "inspect" "66bf2dead43be9a672e8e16207de28090e86825e037cf94d630e7caac97a0ef6"`
[INFO] running `"docker" "rm" "-f" "66bf2dead43be9a672e8e16207de28090e86825e037cf94d630e7caac97a0ef6"`
[INFO] [stdout] 66bf2dead43be9a672e8e16207de28090e86825e037cf94d630e7caac97a0ef6