[INFO] fetching crate search_trees 0.0.3...
[INFO] testing search_trees-0.0.3 against beta-2022-04-10 for beta-1.61-1
[INFO] extracting crate search_trees 0.0.3 into /workspace/builds/worker-4/source
[INFO] validating manifest of crates.io crate search_trees 0.0.3 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 search_trees 0.0.3
[INFO] finished tweaking crates.io crate search_trees 0.0.3
[INFO] tweaked toml for crates.io crate search_trees 0.0.3 written to /workspace/builds/worker-4/source/Cargo.toml
[INFO] crate crates.io crate search_trees 0.0.3 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-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] b5ce5cc3f39db1d801e220b073ceb5b15cdc1671e76823cd901d05796f67877a
[INFO] running `Command { std: "docker" "start" "-a" "b5ce5cc3f39db1d801e220b073ceb5b15cdc1671e76823cd901d05796f67877a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "b5ce5cc3f39db1d801e220b073ceb5b15cdc1671e76823cd901d05796f67877a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b5ce5cc3f39db1d801e220b073ceb5b15cdc1671e76823cd901d05796f67877a", kill_on_drop: false }`
[INFO] [stdout] b5ce5cc3f39db1d801e220b073ceb5b15cdc1671e76823cd901d05796f67877a
[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] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 36f4270c1ae162b4c92bb4b274e92b09e2705af45374a68d269f73138b21c5cf
[INFO] running `Command { std: "docker" "start" "-a" "36f4270c1ae162b4c92bb4b274e92b09e2705af45374a68d269f73138b21c5cf", kill_on_drop: false }`
[INFO] [stderr]    Compiling search_trees v0.0.3 (/opt/rustwide/workdir)
[INFO] [stdout] error: expected one of `!` or `::`, found keyword `use`
[INFO] [stdout]   --> src/avltree.rs:11:1
[INFO] [stdout]    |
[INFO] [stdout] 10 | ppppp
[INFO] [stdout]    |      - expected one of `!` or `::`
[INFO] [stdout] 11 | use std::cell::RefCell;
[INFO] [stdout]    | ^^^ unexpected token
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0432]: unresolved import `crate::avltree::AVLTree`
[INFO] [stdout]   --> src/prelude.rs:11:9
[INFO] [stdout]    |
[INFO] [stdout] 11 | pub use crate::avltree::AVLTree;
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^^^^^^^ no `AVLTree` in `avltree`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 2 previous errors
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0432`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `search_trees` due to 3 previous errors
[INFO] running `Command { std: "docker" "inspect" "36f4270c1ae162b4c92bb4b274e92b09e2705af45374a68d269f73138b21c5cf", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "36f4270c1ae162b4c92bb4b274e92b09e2705af45374a68d269f73138b21c5cf", kill_on_drop: false }`
[INFO] [stdout] 36f4270c1ae162b4c92bb4b274e92b09e2705af45374a68d269f73138b21c5cf