[INFO] fetching crate gap_vec 0.1.0...
[INFO] testing gap_vec-0.1.0 against beta-2022-04-10 for beta-1.61-1
[INFO] extracting crate gap_vec 0.1.0 into /workspace/builds/worker-4/source
[INFO] validating manifest of crates.io crate gap_vec 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 gap_vec 0.1.0
[INFO] finished tweaking crates.io crate gap_vec 0.1.0
[INFO] tweaked toml for crates.io crate gap_vec 0.1.0 written to /workspace/builds/worker-4/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2022-04-10" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[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-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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] 38e354a4d2f7095e5efe8c97ad5bf4c55b0c7c7faf6446f1e603a353b506fc84
[INFO] running `Command { std: "docker" "start" "-a" "38e354a4d2f7095e5efe8c97ad5bf4c55b0c7c7faf6446f1e603a353b506fc84", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "38e354a4d2f7095e5efe8c97ad5bf4c55b0c7c7faf6446f1e603a353b506fc84", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "38e354a4d2f7095e5efe8c97ad5bf4c55b0c7c7faf6446f1e603a353b506fc84", kill_on_drop: false }`
[INFO] [stdout] 38e354a4d2f7095e5efe8c97ad5bf4c55b0c7c7faf6446f1e603a353b506fc84
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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] [stdout] e18d1a6a46b6528f1d3ed523590aa9519353e36c0ee6acc4e11b29000f9aae29
[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" "e18d1a6a46b6528f1d3ed523590aa9519353e36c0ee6acc4e11b29000f9aae29", kill_on_drop: false }`
[INFO] [stderr]    Compiling gap_vec v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0603]: module `raw_vec` is private
[INFO] [stdout]    --> src/lib.rs:51:12
[INFO] [stdout]     |
[INFO] [stdout] 51  | use alloc::raw_vec::RawVec;
[INFO] [stdout]     |            ^^^^^^^ private module
[INFO] [stdout]     |
[INFO] [stdout] note: the module `raw_vec` is defined here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stdout]   --> src/lib.rs:44:12
[INFO] [stdout]    |
[INFO] [stdout] 44 | #![feature(core_intrinsics, alloc, raw_vec_internals)]
[INFO] [stdout]    |            ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stdout]   --> src/lib.rs:44:29
[INFO] [stdout]    |
[INFO] [stdout] 44 | #![feature(core_intrinsics, alloc, raw_vec_internals)]
[INFO] [stdout]    |                             ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stdout]   --> src/lib.rs:44:36
[INFO] [stdout]    |
[INFO] [stdout] 44 | #![feature(core_intrinsics, alloc, raw_vec_internals)]
[INFO] [stdout]    |                                    ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the feature `alloc` has been stable since 1.36.0 and no longer requires an attribute to enable
[INFO] [stdout]   --> src/lib.rs:44:29
[INFO] [stdout]    |
[INFO] [stdout] 44 | #![feature(core_intrinsics, alloc, raw_vec_internals)]
[INFO] [stdout]    |                             ^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(stable_features)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0392]: parameter `T` is never used
[INFO] [stdout]    --> src/lib.rs:400:21
[INFO] [stdout]     |
[INFO] [stdout] 400 | pub struct Iter<'a, T: 'a> {
[INFO] [stdout]     |                     ^ unused parameter
[INFO] [stdout]     |
[INFO] [stdout]     = help: consider removing `T`, referring to it in a field, or using a marker such as `PhantomData`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 5 previous errors; 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] Some errors have detailed explanations: E0392, E0554, E0603.
[INFO] [stdout] 
[INFO] [stdout] For more information about an error, try `rustc --explain E0392`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `gap_vec` due to 6 previous errors; 1 warning emitted
[INFO] running `Command { std: "docker" "inspect" "e18d1a6a46b6528f1d3ed523590aa9519353e36c0ee6acc4e11b29000f9aae29", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e18d1a6a46b6528f1d3ed523590aa9519353e36c0ee6acc4e11b29000f9aae29", kill_on_drop: false }`
[INFO] [stdout] e18d1a6a46b6528f1d3ed523590aa9519353e36c0ee6acc4e11b29000f9aae29