[INFO] cloning repository https://github.com/SirWindfield/showcase-once_cell-sync
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/SirWindfield/showcase-once_cell-sync" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FSirWindfield%2Fshowcase-once_cell-sync", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FSirWindfield%2Fshowcase-once_cell-sync'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 33b5f75bc12867882c92f4fc24491a158e8f50ee
[INFO] testing SirWindfield/showcase-once_cell-sync against beta-2022-04-10 for beta-1.61-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FSirWindfield%2Fshowcase-once_cell-sync" "/workspace/builds/worker-12/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-12/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/SirWindfield/showcase-once_cell-sync 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 git repo https://github.com/SirWindfield/showcase-once_cell-sync
[INFO] finished tweaking git repo https://github.com/SirWindfield/showcase-once_cell-sync
[INFO] tweaked toml for git repo https://github.com/SirWindfield/showcase-once_cell-sync written to /workspace/builds/worker-12/source/Cargo.toml
[INFO] crate git repo https://github.com/SirWindfield/showcase-once_cell-sync 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] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/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] [stdout] 917af5c7ace57dab937908f737232336470600ae3b863c283cd7a15cafe51a52
[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" "917af5c7ace57dab937908f737232336470600ae3b863c283cd7a15cafe51a52", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "917af5c7ace57dab937908f737232336470600ae3b863c283cd7a15cafe51a52", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "917af5c7ace57dab937908f737232336470600ae3b863c283cd7a15cafe51a52", kill_on_drop: false }`
[INFO] [stdout] 917af5c7ace57dab937908f737232336470600ae3b863c283cd7a15cafe51a52
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/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] bdabee2e9097c8b5e8fed296eb2d474f2a7aa3dd733585a762ae8be9c61ee5ec
[INFO] running `Command { std: "docker" "start" "-a" "bdabee2e9097c8b5e8fed296eb2d474f2a7aa3dd733585a762ae8be9c61ee5ec", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.73
[INFO] [stderr]    Compiling pkg-config v0.3.18
[INFO] [stderr]    Compiling tinyvec v0.3.3
[INFO] [stderr]    Compiling log v0.4.11
[INFO] [stderr]    Compiling once_cell v1.4.0
[INFO] [stderr]    Compiling unicode-normalization v0.1.13
[INFO] [stderr]    Compiling jobserver v0.1.21
[INFO] [stderr]    Compiling idna v0.2.0
[INFO] [stderr]    Compiling cc v1.0.58
[INFO] [stderr]    Compiling url v2.1.1
[INFO] [stderr]    Compiling libz-sys v1.0.25
[INFO] [stderr]    Compiling openssl-sys v0.9.58
[INFO] [stderr]    Compiling libssh2-sys v0.2.18
[INFO] [stderr]    Compiling libgit2-sys v0.12.9+1.0.1
[INFO] [stderr]    Compiling git2 v0.13.8
[INFO] [stderr]    Compiling tmp v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0277]: `UnsafeCell<Option<git2::Repository>>` cannot be shared between threads safely
[INFO] [stdout]  --> src/main.rs:7:18
[INFO] [stdout]   |
[INFO] [stdout] 7 |     static REPO: OnceCell<Repository> = OnceCell::new();
[INFO] [stdout]   |                  ^^^^^^^^^^^^^^^^^^^^ `UnsafeCell<Option<git2::Repository>>` cannot be shared between threads safely
[INFO] [stdout]   |
[INFO] [stdout]   = help: within `once_cell::unsync::OnceCell<git2::Repository>`, the trait `Sync` is not implemented for `UnsafeCell<Option<git2::Repository>>`
[INFO] [stdout]   = note: required because it appears within the type `once_cell::unsync::OnceCell<git2::Repository>`
[INFO] [stdout]   = note: shared static variables must have a type that implements `Sync`
[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 E0277`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `tmp` due to 2 previous errors
[INFO] running `Command { std: "docker" "inspect" "bdabee2e9097c8b5e8fed296eb2d474f2a7aa3dd733585a762ae8be9c61ee5ec", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "bdabee2e9097c8b5e8fed296eb2d474f2a7aa3dd733585a762ae8be9c61ee5ec", kill_on_drop: false }`
[INFO] [stdout] bdabee2e9097c8b5e8fed296eb2d474f2a7aa3dd733585a762ae8be9c61ee5ec