[INFO] crate basehangul 0.1.10 is already in cache
[INFO] testing basehangul-0.1.10 against beta-2020-07-24 for beta-1.46-1
[INFO] extracting crate basehangul 0.1.10 into /workspace/builds/worker-5/source
[INFO] validating manifest of crates.io crate basehangul 0.1.10 on toolchain beta-2020-07-24
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2020-07-24" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[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-5/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2020-07-24" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2020-07-24" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/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_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--network" "none" "rustops/crates-build-env@sha256:a636fd89d022f18117e1dc8fb37a0a009933cdbbe082814857f0e2024962d47c" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2020-07-24" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 9e9c27ddf713516b3766959ad314cb09c2eab6f743086ad01e6c1c8d6ee8b570
[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" "9e9c27ddf713516b3766959ad314cb09c2eab6f743086ad01e6c1c8d6ee8b570", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "9e9c27ddf713516b3766959ad314cb09c2eab6f743086ad01e6c1c8d6ee8b570", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "9e9c27ddf713516b3766959ad314cb09c2eab6f743086ad01e6c1c8d6ee8b570", kill_on_drop: false }`
[INFO] [stdout] 9e9c27ddf713516b3766959ad314cb09c2eab6f743086ad01e6c1c8d6ee8b570
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/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@sha256:a636fd89d022f18117e1dc8fb37a0a009933cdbbe082814857f0e2024962d47c" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2020-07-24" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] c37a4e7beef80b675d879e361a21363781c81f91d93ee9299050d75474ccddbb
[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" "c37a4e7beef80b675d879e361a21363781c81f91d93ee9299050d75474ccddbb", kill_on_drop: false }`
[INFO] [stderr]    Compiling basehangul v0.1.10 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0432]: unresolved import `std::borrow::IntoCow`
[INFO] [stdout]   --> src/lib.rs:14:24
[INFO] [stdout]    |
[INFO] [stdout] 14 | use std::borrow::{Cow, IntoCow};
[INFO] [stdout]    |                        ^^^^^^^ no `IntoCow` in `borrow`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stdout]  --> src/lib.rs:9:1
[INFO] [stdout]   |
[INFO] [stdout] 9 | #![feature(into_cow)] // lib stability features as per RFC #507
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: `...` range patterns are deprecated
[INFO] [stdout]    --> src/lib.rs:250:27
[INFO] [stdout]     |
[INFO] [stdout] 250 |                 Some(b @ 0...1023) => {
[INFO] [stdout]     |                           ^^^ help: use `..=` for an inclusive range
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(ellipsis_inclusive_range_patterns)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: `...` range patterns are deprecated
[INFO] [stdout]    --> src/lib.rs:254:30
[INFO] [stdout]     |
[INFO] [stdout] 254 |                 Some(b @ 1024...2045) => {
[INFO] [stdout]     |                              ^^^ help: use `..=` for an inclusive range
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0599]: no method named `into_cow` found for reference `&'static str` in the current scope
[INFO] [stdout]    --> src/lib.rs:243:68
[INFO] [stdout]     |
[INFO] [stdout] 243 |                     return Some(Err("non-integral number of bytes".into_cow()));
[INFO] [stdout]     |                                                                    ^^^^^^^^ method not found in `&'static str`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0599]: no method named `into_cow` found for reference `&'static str` in the current scope
[INFO] [stdout]    --> src/lib.rs:271:57
[INFO] [stdout]     |
[INFO] [stdout] 271 |                     return Some(Err("invalid code word".into_cow()));
[INFO] [stdout]     |                                                         ^^^^^^^^ method not found in `&'static str`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 4 previous errors; 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] Some errors have detailed explanations: E0432, E0554, E0599.
[INFO] [stdout] 
[INFO] [stdout] For more information about an error, try `rustc --explain E0432`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `basehangul`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `Command { std: "docker" "inspect" "c37a4e7beef80b675d879e361a21363781c81f91d93ee9299050d75474ccddbb", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c37a4e7beef80b675d879e361a21363781c81f91d93ee9299050d75474ccddbb", kill_on_drop: false }`
[INFO] [stdout] c37a4e7beef80b675d879e361a21363781c81f91d93ee9299050d75474ccddbb