[INFO] crate basehangul 0.1.10 is already in cache
[INFO] testing basehangul-0.1.10 against 1.44.0 for beta-1.45-1
[INFO] extracting crate basehangul 0.1.10 into /workspace/builds/worker-9/source
[INFO] validating manifest of crates.io crate basehangul 0.1.10 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 basehangul 0.1.10
[INFO] finished tweaking crates.io crate basehangul 0.1.10
[INFO] tweaked toml for crates.io crate basehangul 0.1.10 written to /workspace/builds/worker-9/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-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] [stdout] 846f009a23c8d447a0487471b20fc611a276412b924236dd7b5b6af33476757d
[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" "846f009a23c8d447a0487471b20fc611a276412b924236dd7b5b6af33476757d"`
[INFO] [stderr] sudo: setrlimit(RLIMIT_CORE): Operation not permitted
[INFO] [stderr]    Compiling basehangul v0.1.10 (/opt/rustwide/workdir)
[INFO] [stderr] error[E0432]: unresolved import `std::borrow::IntoCow`
[INFO] [stderr]   --> src/lib.rs:14:24
[INFO] [stderr]    |
[INFO] [stderr] 14 | use std::borrow::{Cow, IntoCow};
[INFO] [stderr]    |                        ^^^^^^^ no `IntoCow` in `borrow`
[INFO] [stderr] 
[INFO] [stderr] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stderr]  --> src/lib.rs:9:1
[INFO] [stderr]   |
[INFO] [stderr] 9 | #![feature(into_cow)] // lib stability features as per RFC #507
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: `...` range patterns are deprecated
[INFO] [stderr]    --> src/lib.rs:250:27
[INFO] [stderr]     |
[INFO] [stderr] 250 |                 Some(b @ 0...1023) => {
[INFO] [stderr]     |                           ^^^ help: use `..=` for an inclusive range
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(ellipsis_inclusive_range_patterns)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: `...` range patterns are deprecated
[INFO] [stderr]    --> src/lib.rs:254:30
[INFO] [stderr]     |
[INFO] [stderr] 254 |                 Some(b @ 1024...2045) => {
[INFO] [stderr]     |                              ^^^ help: use `..=` for an inclusive range
[INFO] [stderr] 
[INFO] [stderr] error[E0599]: no method named `into_cow` found for reference `&'static str` in the current scope
[INFO] [stderr]    --> src/lib.rs:243:68
[INFO] [stderr]     |
[INFO] [stderr] 243 |                     return Some(Err("non-integral number of bytes".into_cow()));
[INFO] [stderr]     |                                                                    ^^^^^^^^ method not found in `&'static str`
[INFO] [stderr] 
[INFO] [stderr] error[E0599]: no method named `into_cow` found for reference `&'static str` in the current scope
[INFO] [stderr]    --> src/lib.rs:271:57
[INFO] [stderr]     |
[INFO] [stderr] 271 |                     return Some(Err("invalid code word".into_cow()));
[INFO] [stderr]     |                                                         ^^^^^^^^ method not found in `&'static str`
[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, E0599.
[INFO] [stderr] For more information about an error, try `rustc --explain E0432`.
[INFO] [stderr] error: could not compile `basehangul`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `"docker" "inspect" "846f009a23c8d447a0487471b20fc611a276412b924236dd7b5b6af33476757d"`
[INFO] running `"docker" "rm" "-f" "846f009a23c8d447a0487471b20fc611a276412b924236dd7b5b6af33476757d"`
[INFO] [stdout] 846f009a23c8d447a0487471b20fc611a276412b924236dd7b5b6af33476757d