[INFO] fetching crate warnalyzer 0.1.0...
[INFO] testing warnalyzer-0.1.0 against 1.44.0 for beta-1.45-1
[INFO] extracting crate warnalyzer 0.1.0 into /workspace/builds/worker-8/source
[INFO] validating manifest of crates.io crate warnalyzer 0.1.0 on toolchain 1.44.0
[INFO] running `"/workspace/cargo-home/bin/cargo" "+1.44.0" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking crates.io crate warnalyzer 0.1.0
[INFO] finished tweaking crates.io crate warnalyzer 0.1.0
[INFO] tweaked toml for crates.io crate warnalyzer 0.1.0 written to /workspace/builds/worker-8/source/Cargo.toml
[INFO] running `"/workspace/cargo-home/bin/cargo" "+1.44.0" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/workspace/cargo-home/bin/cargo" "+1.44.0" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/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" "MAP_USER_ID=0" "-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" "--network" "none" "rustops/crates-build-env" "/opt/rustwide/cargo-home/bin/cargo" "+1.44.0" "build" "--frozen"`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] a2fab33748be290909fb43047616610983742e25c4c655c3291ca0ba25fa2c70
[INFO] running `"docker" "start" "-a" "a2fab33748be290909fb43047616610983742e25c4c655c3291ca0ba25fa2c70"`
[INFO] [stderr] sudo: setrlimit(RLIMIT_CORE): Operation not permitted
[INFO] [stderr]    Compiling syn v1.0.30
[INFO] [stderr]    Compiling proc-macro2 v0.4.30
[INFO] [stderr]    Compiling stable_deref_trait v1.1.1
[INFO] [stderr]    Compiling serde v1.0.111
[INFO] [stderr]    Compiling unicode-xid v0.1.0
[INFO] [stderr]    Compiling syn v0.15.44
[INFO] [stderr]    Compiling intervaltree v0.2.6
[INFO] [stderr]    Compiling smallvec v0.6.13
[INFO] [stderr]    Compiling env_logger v0.6.2
[INFO] [stderr]    Compiling rayon-core v1.7.0
[INFO] [stderr]    Compiling owning_ref v0.3.3
[INFO] [stderr]    Compiling pretty_env_logger v0.3.1
[INFO] [stderr]    Compiling parking_lot_core v0.2.14
[INFO] [stderr]    Compiling rayon v1.3.0
[INFO] [stderr]    Compiling parking_lot v0.4.8
[INFO] [stderr]    Compiling chashmap v2.2.2
[INFO] [stderr]    Compiling quote v0.6.13
[INFO] [stderr]    Compiling serde_derive v1.0.111
[INFO] [stderr]    Compiling serde_json v1.0.53
[INFO] [stderr]    Compiling warnalyzer v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr] error[E0432]: unresolved imports `syn::visit`, `syn::visit`
[INFO] [stderr]   --> src/mute.rs:88:11
[INFO] [stderr]    |
[INFO] [stderr] 88 |     use syn::visit::{visit_item, self};
[INFO] [stderr]    |              ^^^^^               ^^^^ no `visit` in the root
[INFO] [stderr]    |              |
[INFO] [stderr]    |              could not find `visit` in `syn`
[INFO] [stderr] 
[INFO] [stderr] error[E0433]: failed to resolve: could not find `visit` in `syn`
[INFO] [stderr]    --> src/mute.rs:105:22
[INFO] [stderr]     |
[INFO] [stderr] 105 |     impl<'ast, 'a> syn::visit::Visit<'ast> for Visitor<'a> {
[INFO] [stderr]     |                         ^^^^^ could not find `visit` in `syn`
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to 2 previous errors
[INFO] [stderr] 
[INFO] [stderr] Some errors have detailed explanations: E0432, E0433.
[INFO] [stderr] For more information about an error, try `rustc --explain E0432`.
[INFO] [stderr] error: could not compile `warnalyzer`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `"docker" "inspect" "a2fab33748be290909fb43047616610983742e25c4c655c3291ca0ba25fa2c70"`
[INFO] running `"docker" "rm" "-f" "a2fab33748be290909fb43047616610983742e25c4c655c3291ca0ba25fa2c70"`
[INFO] [stdout] a2fab33748be290909fb43047616610983742e25c4c655c3291ca0ba25fa2c70