[INFO] fetching crate sentinel-core 0.1.0...
[INFO] testing sentinel-core-0.1.0 against beta-2022-04-10 for beta-1.61-1
[INFO] extracting crate sentinel-core 0.1.0 into /workspace/builds/worker-11/source
[INFO] validating manifest of crates.io crate sentinel-core 0.1.0 on toolchain beta-2022-04-10
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2022-04-10" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate sentinel-core 0.1.0
[INFO] removed 24 missing examples
[INFO] finished tweaking crates.io crate sentinel-core 0.1.0
[INFO] tweaked toml for crates.io crate sentinel-core 0.1.0 written to /workspace/builds/worker-11/source/Cargo.toml
[INFO] crate crates.io crate sentinel-core 0.1.0 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2022-04-10" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-11/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-11/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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:eaef2f80f755933c374d2ae5edccceec0c1312ceb8a4e0b6404e8ab76561e1e5" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2022-04-10" "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] 1e28d2b421092bfe1871c27ff316f6f5876404eee976bc9a8a497a272d53c5d2
[INFO] running `Command { std: "docker" "start" "-a" "1e28d2b421092bfe1871c27ff316f6f5876404eee976bc9a8a497a272d53c5d2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "1e28d2b421092bfe1871c27ff316f6f5876404eee976bc9a8a497a272d53c5d2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1e28d2b421092bfe1871c27ff316f6f5876404eee976bc9a8a497a272d53c5d2", kill_on_drop: false }`
[INFO] [stdout] 1e28d2b421092bfe1871c27ff316f6f5876404eee976bc9a8a497a272d53c5d2
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-11/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-11/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=warn" "-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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:eaef2f80f755933c374d2ae5edccceec0c1312ceb8a4e0b6404e8ab76561e1e5" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2022-04-10" "build" "--frozen" "--message-format=json", 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] 24ec61493886f9482a710d4f1d0cc1761287144481b6c1107cf930b62b3d916d
[INFO] running `Command { std: "docker" "start" "-a" "24ec61493886f9482a710d4f1d0cc1761287144481b6c1107cf930b62b3d916d", kill_on_drop: false }`
[INFO] [stderr]    Compiling syn v1.0.86
[INFO] [stderr]    Compiling crossbeam-utils v0.8.7
[INFO] [stderr]    Compiling crossbeam-epoch v0.9.7
[INFO] [stderr]    Compiling sysinfo v0.23.5
[INFO] [stderr]    Compiling getrandom v0.2.5
[INFO] [stderr]    Compiling time v0.3.7
[INFO] [stderr]    Compiling ahash v0.7.6
[INFO] [stderr]    Compiling hashbrown v0.11.2
[INFO] [stderr]    Compiling crossbeam-channel v0.5.2
[INFO] [stderr]    Compiling indexmap v1.8.0
[INFO] [stderr]    Compiling lru v0.7.3
[INFO] [stderr]    Compiling crossbeam-deque v0.8.1
[INFO] [stderr]    Compiling rayon-core v1.9.1
[INFO] [stderr]    Compiling rayon v1.5.1
[INFO] [stderr]    Compiling serde_derive v1.0.136
[INFO] [stderr]    Compiling enum-map-derive v0.6.0
[INFO] [stderr]    Compiling enum-map v1.1.1
[INFO] [stderr]    Compiling serde v1.0.136
[INFO] [stderr]    Compiling serde_yaml v0.8.23
[INFO] [stderr]    Compiling serde_json v1.0.79
[INFO] [stderr]    Compiling uuid v0.8.2
[INFO] [stderr]    Compiling sentinel-core v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0515]: cannot return value referencing temporary value
[INFO] [stdout]    --> src/core/hotspot/cache.rs:127:9
[INFO] [stdout]     |
[INFO] [stdout] 127 |            self.cache
[INFO] [stdout]     |   _________^
[INFO] [stdout]     |  |_________|
[INFO] [stdout]     | ||
[INFO] [stdout] 128 | ||             .read()
[INFO] [stdout] 129 | ||             .unwrap()
[INFO] [stdout]     | ||_____________________- temporary value created here
[INFO] [stdout] 130 | |              .iter()
[INFO] [stdout] 131 | |              .map(|(k, _v)| k)
[INFO] [stdout] 132 | |              .rev()
[INFO] [stdout] 133 | |              .collect()
[INFO] [stdout]     | |_______________________^ returns a value referencing data owned by the current function
[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 E0515`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `sentinel-core` due to 2 previous errors
[INFO] running `Command { std: "docker" "inspect" "24ec61493886f9482a710d4f1d0cc1761287144481b6c1107cf930b62b3d916d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "24ec61493886f9482a710d4f1d0cc1761287144481b6c1107cf930b62b3d916d", kill_on_drop: false }`
[INFO] [stdout] 24ec61493886f9482a710d4f1d0cc1761287144481b6c1107cf930b62b3d916d