[INFO] cloning repository https://github.com/gregtatum/rust-sketches
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/gregtatum/rust-sketches" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fgregtatum%2Frust-sketches", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fgregtatum%2Frust-sketches'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 06ad5f794a975232afe70979e001b7708cdd8c95
[INFO] testing gregtatum/rust-sketches against 1.60.0 for beta-1.61-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fgregtatum%2Frust-sketches" "/workspace/builds/worker-6/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-6/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/gregtatum/rust-sketches on toolchain 1.60.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.60.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] removed /workspace/builds/worker-6/source/rust-toolchain
[INFO] started tweaking git repo https://github.com/gregtatum/rust-sketches
[INFO] finished tweaking git repo https://github.com/gregtatum/rust-sketches
[INFO] tweaked toml for git repo https://github.com/gregtatum/rust-sketches written to /workspace/builds/worker-6/source/Cargo.toml
[INFO] crate git repo https://github.com/gregtatum/rust-sketches already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.60.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded smallstr v0.2.0
[INFO] [stderr]   Downloaded icu_locid v0.1.0
[INFO] [stderr]   Downloaded icu_datetime v0.1.0
[INFO] [stderr]   Downloaded icu_provider v0.1.0
[INFO] [stderr]   Downloaded icu_locid_macros v0.1.0
[INFO] [stderr]   Downloaded icu v0.1.0
[INFO] [stderr]   Downloaded tinystr-raw v0.1.0
[INFO] [stderr]   Downloaded icu_plurals v0.1.0
[INFO] [stderr]   Downloaded fixed_decimal v0.1.0
[INFO] [stderr]   Downloaded icu_uniset v0.1.0
[INFO] [stderr]   Downloaded icu_provider_fs v0.1.0
[INFO] [stderr]   Downloaded tinystr v0.4.1
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/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" "+1.60.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] c23043bab200f9b95de2a248b29735883e06d1c3dc7fb1acced5010867881c92
[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" "c23043bab200f9b95de2a248b29735883e06d1c3dc7fb1acced5010867881c92", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "c23043bab200f9b95de2a248b29735883e06d1c3dc7fb1acced5010867881c92", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c23043bab200f9b95de2a248b29735883e06d1c3dc7fb1acced5010867881c92", kill_on_drop: false }`
[INFO] [stdout] c23043bab200f9b95de2a248b29735883e06d1c3dc7fb1acced5010867881c92
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/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" "+1.60.0" "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] 722d34e4c41d74be73f32582edc3809eb3eb56fb812ccc1ff1c2508963615154
[INFO] running `Command { std: "docker" "start" "-a" "722d34e4c41d74be73f32582edc3809eb3eb56fb812ccc1ff1c2508963615154", kill_on_drop: false }`
[INFO] [stderr]    Compiling syn v1.0.54
[INFO] [stderr]    Compiling tinystr-raw v0.1.0
[INFO] [stderr]    Compiling smallvec v1.5.1
[INFO] [stderr]    Compiling icu_uniset v0.1.0
[INFO] [stderr]    Compiling tinystr-macros v0.2.0
[INFO] [stderr]    Compiling fixed_decimal v0.1.0
[INFO] [stderr]    Compiling tinystr v0.4.1
[INFO] [stderr]    Compiling serde_derive v1.0.118
[INFO] [stderr]    Compiling serde v1.0.118
[INFO] [stderr]    Compiling icu_locid v0.1.0
[INFO] [stderr]    Compiling smallstr v0.2.0
[INFO] [stderr]    Compiling erased-serde v0.3.12
[INFO] [stderr]    Compiling toml v0.5.7
[INFO] [stderr]    Compiling serde_json v1.0.60
[INFO] [stderr]    Compiling icu_provider v0.1.0
[INFO] [stderr]    Compiling proc-macro-crate v0.1.5
[INFO] [stderr]    Compiling icu_locid_macros v0.1.0
[INFO] [stderr]    Compiling icu_plurals v0.1.0
[INFO] [stderr]    Compiling icu_datetime v0.1.0
[INFO] [stderr]    Compiling icu_provider_fs v0.1.0
[INFO] [stderr]    Compiling icu v0.1.0
[INFO] [stderr]    Compiling spec-rs v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: field is never read: `timestamp`
[INFO] [stdout]   --> src/calendar.rs:17:5
[INFO] [stdout]    |
[INFO] [stdout] 17 |     timestamp: u64,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] note: `Date` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout]   --> src/calendar.rs:7:10
[INFO] [stdout]    |
[INFO] [stdout] 7  | #[derive(Debug)]
[INFO] [stdout]    |          ^^^^^
[INFO] [stdout]    = note: this warning originates in the derive macro `Debug` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `is_leap_year`
[INFO] [stdout]   --> src/calendar.rs:18:5
[INFO] [stdout]    |
[INFO] [stdout] 18 |     is_leap_year: bool,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout] note: `Date` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout]   --> src/calendar.rs:7:10
[INFO] [stdout]    |
[INFO] [stdout] 7  | #[derive(Debug)]
[INFO] [stdout]    |          ^^^^^
[INFO] [stdout]    = note: this warning originates in the derive macro `Debug` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]  --> src/lib.rs:2:12
[INFO] [stdout]   |
[INFO] [stdout] 2 | #![feature(test)]
[INFO] [stdout]   |            ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to previous error; 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0554`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `spec-rs` due to 2 previous errors; 2 warnings emitted
[INFO] running `Command { std: "docker" "inspect" "722d34e4c41d74be73f32582edc3809eb3eb56fb812ccc1ff1c2508963615154", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "722d34e4c41d74be73f32582edc3809eb3eb56fb812ccc1ff1c2508963615154", kill_on_drop: false }`
[INFO] [stdout] 722d34e4c41d74be73f32582edc3809eb3eb56fb812ccc1ff1c2508963615154