[INFO] fetching crate klu_core 0.2.1...
[INFO] checking klu_core-0.2.1 against beta for pr-78714
[INFO] extracting crate klu_core 0.2.1 into /workspace/builds/worker-0/source
[INFO] validating manifest of crates.io crate klu_core 0.2.1 on toolchain beta
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking crates.io crate klu_core 0.2.1
[INFO] finished tweaking crates.io crate klu_core 0.2.1
[INFO] tweaked toml for crates.io crate klu_core 0.2.1 written to /workspace/builds/worker-0/source/Cargo.toml
[INFO] crate crates.io crate klu_core 0.2.1 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/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@sha256:6eabd152ff4036248d66efda456a36cb33d24b7291b33f25f75140726c88da35" "/opt/rustwide/cargo-home/bin/cargo" "+beta" "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] 0bb4ae48656f9181fdaac5571a043c6c62f816b36ce7e5de3de0d36204cc1ddd
[INFO] running `Command { std: "docker" "start" "-a" "0bb4ae48656f9181fdaac5571a043c6c62f816b36ce7e5de3de0d36204cc1ddd", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "0bb4ae48656f9181fdaac5571a043c6c62f816b36ce7e5de3de0d36204cc1ddd", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "0bb4ae48656f9181fdaac5571a043c6c62f816b36ce7e5de3de0d36204cc1ddd", kill_on_drop: false }`
[INFO] [stdout] 0bb4ae48656f9181fdaac5571a043c6c62f816b36ce7e5de3de0d36204cc1ddd
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/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" "rustops/crates-build-env@sha256:6eabd152ff4036248d66efda456a36cb33d24b7291b33f25f75140726c88da35" "/opt/rustwide/cargo-home/bin/cargo" "+beta" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] fa3748b09bcae4f186955075e62d39215ba9aecd2ead7d5c47ff1042e6b0ec64
[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" "fa3748b09bcae4f186955075e62d39215ba9aecd2ead7d5c47ff1042e6b0ec64", kill_on_drop: false }`
[INFO] [stderr]     Checking klu_core v0.2.1 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0463]: can't find crate for `klu`
[INFO] [stdout]  --> examples/r_exists.rs:1:1
[INFO] [stdout]   |
[INFO] [stdout] 1 | extern crate klu;
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^ can't find crate
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to previous error
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0463`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `klu_core`
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stdout] warning: unused import: `std::io::prelude::*`
[INFO] [stdout]  --> examples/read_file.rs:2:5
[INFO] [stdout]   |
[INFO] [stdout] 2 | use std::io::prelude::*;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: build failed
[INFO] running `Command { std: "docker" "inspect" "fa3748b09bcae4f186955075e62d39215ba9aecd2ead7d5c47ff1042e6b0ec64", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "fa3748b09bcae4f186955075e62d39215ba9aecd2ead7d5c47ff1042e6b0ec64", kill_on_drop: false }`
[INFO] [stdout] fa3748b09bcae4f186955075e62d39215ba9aecd2ead7d5c47ff1042e6b0ec64