[INFO] crate cron-bugfix-version 0.4.0 is already in cache
[INFO] testing cron-bugfix-version-0.4.0 against 1.44.0 for beta-1.45-1
[INFO] extracting crate cron-bugfix-version 0.4.0 into /workspace/builds/worker-4/source
[INFO] validating manifest of crates.io crate cron-bugfix-version 0.4.0 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 cron-bugfix-version 0.4.0
[INFO] finished tweaking crates.io crate cron-bugfix-version 0.4.0
[INFO] tweaked toml for crates.io crate cron-bugfix-version 0.4.0 written to /workspace/builds/worker-4/source/Cargo.toml
[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] [stdout] 4218e0f30e9946974dff65ce0256929e42fe453cfe2ac284e853e1cfc11c4a98
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `"docker" "start" "-a" "4218e0f30e9946974dff65ce0256929e42fe453cfe2ac284e853e1cfc11c4a98"`
[INFO] [stderr] sudo: setrlimit(RLIMIT_CORE): Operation not permitted
[INFO] [stderr]    Compiling autocfg v1.0.0
[INFO] [stderr]    Compiling libc v0.2.71
[INFO] [stderr]    Compiling gimli v0.21.0
[INFO] [stderr]    Compiling object v0.19.0
[INFO] [stderr]    Compiling nom v2.1.0
[INFO] [stderr]    Compiling num-traits v0.2.11
[INFO] [stderr]    Compiling num-integer v0.1.42
[INFO] [stderr]    Compiling time v0.1.43
[INFO] [stderr]    Compiling chrono v0.4.11
[INFO] [stderr]    Compiling addr2line v0.12.1
[INFO] [stderr]    Compiling backtrace v0.3.48
[INFO] [stderr]    Compiling error-chain v0.10.0
[INFO] [stderr]    Compiling cron-bugfix-version v0.4.0 (/opt/rustwide/workdir)
[INFO] [stderr] error[E0432]: unresolved import `std::collections::range`
[INFO] [stderr]   --> src/time_unit/mod.rs:18:23
[INFO] [stderr]    |
[INFO] [stderr] 18 | use std::collections::range::{RangeArgument};
[INFO] [stderr]    |                       ^^^^^ could not find `range` in `collections`
[INFO] [stderr] 
[INFO] [stderr] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stderr]  --> src/lib.rs:3:1
[INFO] [stderr]   |
[INFO] [stderr] 3 | #![feature(collections_range)]
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stderr]  --> src/lib.rs:4:1
[INFO] [stderr]   |
[INFO] [stderr] 4 | #![feature(conservative_impl_trait)]
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stderr]  --> src/lib.rs:5:1
[INFO] [stderr]   |
[INFO] [stderr] 5 | #![feature(iterator_step_by)]
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `Duration`
[INFO] [stderr]  --> src/schedule.rs:4:29
[INFO] [stderr]   |
[INFO] [stderr] 4 | use chrono::{Utc, DateTime, Duration, Datelike, Timelike};
[INFO] [stderr]   |                             ^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: the item `Duration` is imported redundantly
[INFO] [stderr]   --> src/schedule.rs:73:13
[INFO] [stderr]    |
[INFO] [stderr] 4  | use chrono::{Utc, DateTime, Duration, Datelike, Timelike};
[INFO] [stderr]    |                             -------- the item `Duration` is already imported here
[INFO] [stderr] ...
[INFO] [stderr] 73 |         use chrono::Duration;
[INFO] [stderr]    |             ^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to 4 previous errors; 2 warnings emitted
[INFO] [stderr] 
[INFO] [stderr] Some errors have detailed explanations: E0432, E0554.
[INFO] [stderr] For more information about an error, try `rustc --explain E0432`.
[INFO] [stderr] error: could not compile `cron-bugfix-version`.
[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] [stderr] error: build failed
[INFO] running `"docker" "inspect" "4218e0f30e9946974dff65ce0256929e42fe453cfe2ac284e853e1cfc11c4a98"`
[INFO] running `"docker" "rm" "-f" "4218e0f30e9946974dff65ce0256929e42fe453cfe2ac284e853e1cfc11c4a98"`
[INFO] [stdout] 4218e0f30e9946974dff65ce0256929e42fe453cfe2ac284e853e1cfc11c4a98