[INFO] updating cached repository https://github.com/brundonsmith/data_structures_and_algorithms
[INFO] running `"git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "-c" "remote.origin.fetch=refs/heads/*:refs/heads/*" "fetch" "origin" "--force" "--prune"`
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] b854c5e099c8880c8d0543ed4782c8f12c426fda
[INFO] checking brundonsmith/data_structures_and_algorithms against master#209b2be09fcaff937480d1fbbe8b31646e361c7a for pr-70917
[INFO] running `"git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fbrundonsmith%2Fdata_structures_and_algorithms" "/workspace/builds/worker-2/source"`
[INFO] [stderr] Cloning into '/workspace/builds/worker-2/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/brundonsmith/data_structures_and_algorithms on toolchain 209b2be09fcaff937480d1fbbe8b31646e361c7a
[INFO] running `"/workspace/cargo-home/bin/cargo" "+209b2be09fcaff937480d1fbbe8b31646e361c7a" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking git repo https://github.com/brundonsmith/data_structures_and_algorithms
[INFO] finished tweaking git repo https://github.com/brundonsmith/data_structures_and_algorithms
[INFO] tweaked toml for git repo https://github.com/brundonsmith/data_structures_and_algorithms written to /workspace/builds/worker-2/source/Cargo.toml
[INFO] crate git repo https://github.com/brundonsmith/data_structures_and_algorithms already has a lockfile, it will not be regenerated
[INFO] running `"/workspace/cargo-home/bin/cargo" "+209b2be09fcaff937480d1fbbe8b31646e361c7a" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/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=forbid" "-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" "+209b2be09fcaff937480d1fbbe8b31646e361c7a" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] c9306b7bfeb59c89b1d189f633f140272003d2d51886ebf9c811d71b8ee45dae
[INFO] running `"docker" "start" "-a" "c9306b7bfeb59c89b1d189f633f140272003d2d51886ebf9c811d71b8ee45dae"`
[INFO] [stderr]     Checking data_structures_and_algorithms v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]  --> src/algorithms/sort.rs:2:22
[INFO] [stderr]   |
[INFO] [stderr] 2 | pub type SortFn<T> = Fn(&mut [T]) -> ();
[INFO] [stderr]   |                      ^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn Fn(&mut [T]) -> ()`
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(bare_trait_objects)]` on by default
[INFO] [stderr] 
[INFO] [stderr] error[E0601]: `main` function not found in crate `data_structures_and_algorithms`
[INFO] [stderr]  --> src/main.rs:2:1
[INFO] [stderr]   |
[INFO] [stderr] 2 | / mod algorithms;
[INFO] [stderr] 3 | | mod data_structures;
[INFO] [stderr]   | |____________________^ consider adding a `main` function to `src/main.rs`
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to previous error
[INFO] [stderr] 
[INFO] [stderr] For more information about this error, try `rustc --explain E0601`.
[INFO] [stderr] error: could not compile `data_structures_and_algorithms`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]  --> src/algorithms/sort.rs:2:22
[INFO] [stderr]   |
[INFO] [stderr] 2 | pub type SortFn<T> = Fn(&mut [T]) -> ();
[INFO] [stderr]   |                      ^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn Fn(&mut [T]) -> ()`
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(bare_trait_objects)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `new`
[INFO] [stderr]   --> src/data_structures/directed_graph/directed_graph.rs:14:5
[INFO] [stderr]    |
[INFO] [stderr] 14 |     pub fn new() -> Self {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `add_node`
[INFO] [stderr]   --> src/data_structures/directed_graph/directed_graph.rs:32:5
[INFO] [stderr]    |
[INFO] [stderr] 32 |     pub fn add_node(&mut self) -> usize {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `well_formed`
[INFO] [stderr]   --> src/data_structures/directed_graph/directed_graph.rs:45:5
[INFO] [stderr]    |
[INFO] [stderr] 45 |     pub fn well_formed(&self) -> bool {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] error: build failed
[INFO] running `"docker" "inspect" "c9306b7bfeb59c89b1d189f633f140272003d2d51886ebf9c811d71b8ee45dae"`
[INFO] running `"docker" "rm" "-f" "c9306b7bfeb59c89b1d189f633f140272003d2d51886ebf9c811d71b8ee45dae"`
[INFO] [stdout] c9306b7bfeb59c89b1d189f633f140272003d2d51886ebf9c811d71b8ee45dae
