[INFO] updating cached repository https://github.com/makarchuk/ctfp
[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] b76ba8adba5c42d8a5454a003bab3d4504eb709a
[INFO] checking makarchuk/ctfp against try#d7b51666469c792a8a3f40849607739bae1e705e for pr-71665
[INFO] running `"git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmakarchuk%2Fctfp" "/workspace/builds/worker-6/source"`
[INFO] [stderr] Cloning into '/workspace/builds/worker-6/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/makarchuk/ctfp on toolchain d7b51666469c792a8a3f40849607739bae1e705e
[INFO] running `"/workspace/cargo-home/bin/cargo" "+d7b51666469c792a8a3f40849607739bae1e705e" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking git repo https://github.com/makarchuk/ctfp
[INFO] finished tweaking git repo https://github.com/makarchuk/ctfp
[INFO] tweaked toml for git repo https://github.com/makarchuk/ctfp written to /workspace/builds/worker-6/source/Cargo.toml
[INFO] crate git repo https://github.com/makarchuk/ctfp already has a lockfile, it will not be regenerated
[INFO] running `"/workspace/cargo-home/bin/cargo" "+d7b51666469c792a8a3f40849607739bae1e705e" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] [stderr] warning: unused manifest key: package.features
[INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/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" "+d7b51666469c792a8a3f40849607739bae1e705e" "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] 3e1df6cb861acaeb05044d83443da1c26f3d16e430cd818efac27c2733b410ff
[INFO] running `"docker" "start" "-a" "3e1df6cb861acaeb05044d83443da1c26f3d16e430cd818efac27c2733b410ff"`
[INFO] [stderr] sudo: setrlimit(RLIMIT_CORE): Operation not permitted
[INFO] [stderr] warning: unused manifest key: package.features
[INFO] [stderr]     Checking ctfp v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr] warning: unused import: `super::chapter1`
[INFO] [stderr]  --> src/chapter7.rs:1:5
[INFO] [stderr]   |
[INFO] [stderr] 1 | use super::chapter1;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `new`
[INFO] [stderr]   --> src/chapter2.rs:21:5
[INFO] [stderr]    |
[INFO] [stderr] 21 |     pub fn new(f: F) -> Self {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `id`
[INFO] [stderr]  --> src/chapter4.rs:7:4
[INFO] [stderr]   |
[INFO] [stderr] 7 | fn id<T>(o: T) -> Optional<T> {
[INFO] [stderr]   |    ^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `safe_sqrt`
[INFO] [stderr]   --> src/chapter4.rs:32:4
[INFO] [stderr]    |
[INFO] [stderr] 32 | fn safe_sqrt(n: f64) -> Optional<f64> {
[INFO] [stderr]    |    ^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `safe_reciprocal`
[INFO] [stderr]   --> src/chapter4.rs:46:4
[INFO] [stderr]    |
[INFO] [stderr] 46 | fn safe_reciprocal(n: f64) -> Optional<f64> {
[INFO] [stderr]    |    ^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `Reader`
[INFO] [stderr]  --> src/chapter7.rs:4:8
[INFO] [stderr]   |
[INFO] [stderr] 4 | struct Reader<F, R, A>
[INFO] [stderr]   |        ^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `map`
[INFO] [stderr]   --> src/chapter7.rs:19:5
[INFO] [stderr]    |
[INFO] [stderr] 19 | /     fn map<G, B>(self, mapper: G) -> Reader<Box<dyn Fn(R) -> B>, R, B>
[INFO] [stderr] 20 | |     where
[INFO] [stderr] 21 | |         G: Fn(A) -> B + Sized + 'static,
[INFO] [stderr] 22 | |         B: 'static,
[INFO] [stderr] ...  |
[INFO] [stderr] 27 | |         };
[INFO] [stderr] 28 | |     }
[INFO] [stderr]    | |_____^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `get`
[INFO] [stderr]   --> src/chapter7.rs:31:5
[INFO] [stderr]    |
[INFO] [stderr] 31 |     fn get(self, r: R) -> A {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `Pair`
[INFO] [stderr]  --> src/chapter8.rs:1:8
[INFO] [stderr]   |
[INFO] [stderr] 1 | struct Pair<A, B> {
[INFO] [stderr]   |        ^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `bimap`
[INFO] [stderr]   --> src/chapter8.rs:7:5
[INFO] [stderr]    |
[INFO] [stderr] 7  | /     fn bimap<F, G, C, D>(f: F, g: G) -> impl Fn(Pair<A, B>) -> Pair<C, D>
[INFO] [stderr] 8  | |     where
[INFO] [stderr] 9  | |         F: Fn(A) -> C + Sized + 'static,
[INFO] [stderr] 10 | |         G: Fn(B) -> D + Sized + 'static,
[INFO] [stderr] ...  |
[INFO] [stderr] 15 | |         })
[INFO] [stderr] 16 | |     }
[INFO] [stderr]    | |_____^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `first`
[INFO] [stderr]   --> src/chapter8.rs:18:5
[INFO] [stderr]    |
[INFO] [stderr] 18 | /     fn first<F, C>(f: F) -> impl Fn(Pair<A, B>) -> Pair<C, B>
[INFO] [stderr] 19 | |     where
[INFO] [stderr] 20 | |         F: Fn(A) -> C + Sized + 'static,
[INFO] [stderr] 21 | |     {
[INFO] [stderr] ...  |
[INFO] [stderr] 25 | |         })
[INFO] [stderr] 26 | |     }
[INFO] [stderr]    | |_____^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `second`
[INFO] [stderr]   --> src/chapter8.rs:28:5
[INFO] [stderr]    |
[INFO] [stderr] 28 | /     fn second<G, D>(g: G) -> impl Fn(Pair<A, B>) -> Pair<A, D>
[INFO] [stderr] 29 | |     where
[INFO] [stderr] 30 | |         G: Fn(B) -> D + Sized + 'static,
[INFO] [stderr] 31 | |     {
[INFO] [stderr] ...  |
[INFO] [stderr] 35 | |         })
[INFO] [stderr] 36 | |     }
[INFO] [stderr]    | |_____^
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `None`
[INFO] [stderr]   --> src/chapter8.rs:41:5
[INFO] [stderr]    |
[INFO] [stderr] 41 |     None(),
[INFO] [stderr]    |     ^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `Cons`
[INFO] [stderr]   --> src/chapter8.rs:42:5
[INFO] [stderr]    |
[INFO] [stderr] 42 |     Cons(A, B),
[INFO] [stderr]    |     ^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `bimap`
[INFO] [stderr]   --> src/chapter8.rs:46:5
[INFO] [stderr]    |
[INFO] [stderr] 46 | /     fn bimap<F, G, C, D>(f: F, g: G) -> impl Fn(PreList<A, B>) -> PreList<C, D>
[INFO] [stderr] 47 | |     where
[INFO] [stderr] 48 | |         F: Fn(A) -> C + Sized + 'static,
[INFO] [stderr] 49 | |         G: Fn(B) -> D + Sized + 'static,
[INFO] [stderr] ...  |
[INFO] [stderr] 54 | |         })
[INFO] [stderr] 55 | |     }
[INFO] [stderr]    | |_____^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `first`
[INFO] [stderr]   --> src/chapter8.rs:57:5
[INFO] [stderr]    |
[INFO] [stderr] 57 | /     fn first<F, C>(f: F) -> impl Fn(PreList<A, B>) -> PreList<C, B>
[INFO] [stderr] 58 | |     where
[INFO] [stderr] 59 | |         F: Fn(A) -> C + Sized + 'static,
[INFO] [stderr] 60 | |     {
[INFO] [stderr] ...  |
[INFO] [stderr] 66 | |         })
[INFO] [stderr] 67 | |     }
[INFO] [stderr]    | |_____^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `second`
[INFO] [stderr]   --> src/chapter8.rs:69:5
[INFO] [stderr]    |
[INFO] [stderr] 69 | /     fn second<G, D>(g: G) -> impl Fn(PreList<A, B>) -> PreList<A, D>
[INFO] [stderr] 70 | |     where
[INFO] [stderr] 71 | |         G: Fn(B) -> D + Sized + 'static,
[INFO] [stderr] 72 | |     {
[INFO] [stderr] ...  |
[INFO] [stderr] 78 | |         })
[INFO] [stderr] 79 | |     }
[INFO] [stderr]    | |_____^
[INFO] [stderr] 
[INFO] [stderr] warning: 17 warnings emitted
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.79s
[INFO] running `"docker" "inspect" "3e1df6cb861acaeb05044d83443da1c26f3d16e430cd818efac27c2733b410ff"`
[INFO] running `"docker" "rm" "-f" "3e1df6cb861acaeb05044d83443da1c26f3d16e430cd818efac27c2733b410ff"`
[INFO] [stdout] 3e1df6cb861acaeb05044d83443da1c26f3d16e430cd818efac27c2733b410ff