[INFO] cloning repository https://github.com/makarchuk/ctfp
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/makarchuk/ctfp" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmakarchuk%2Fctfp", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmakarchuk%2Fctfp'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] b76ba8adba5c42d8a5454a003bab3d4504eb709a
[INFO] checking makarchuk/ctfp against master#f42f19b6d3d785a74dbe57aa395b6c288437dd51 for pr-107123-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmakarchuk%2Fctfp" "/workspace/builds/worker-5-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-5-tc1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/makarchuk/ctfp on toolchain f42f19b6d3d785a74dbe57aa395b6c288437dd51
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+f42f19b6d3d785a74dbe57aa395b6c288437dd51" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] removed /workspace/builds/worker-5-tc1/source/rust-toolchain
[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-5-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/makarchuk/ctfp already has a lockfile, it will not be regenerated
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+f42f19b6d3d785a74dbe57aa395b6c288437dd51" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr] warning: unused manifest key: package.features
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc1/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:a420fdec406141845121210faa381f8029b0be6d4170deff7c4445a424f67918" "/opt/rustwide/cargo-home/bin/cargo" "+f42f19b6d3d785a74dbe57aa395b6c288437dd51" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 877fc759673d8364380d97643cffaadbdc180f9d8cfc69a30cc43355280a2239
[INFO] running `Command { std: "docker" "start" "-a" "877fc759673d8364380d97643cffaadbdc180f9d8cfc69a30cc43355280a2239", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "877fc759673d8364380d97643cffaadbdc180f9d8cfc69a30cc43355280a2239", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "877fc759673d8364380d97643cffaadbdc180f9d8cfc69a30cc43355280a2239", kill_on_drop: false }`
[INFO] [stdout] 877fc759673d8364380d97643cffaadbdc180f9d8cfc69a30cc43355280a2239
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc1/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=forbid" "-e" "RUSTDOCFLAGS=--cap-lints=forbid" "-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:a420fdec406141845121210faa381f8029b0be6d4170deff7c4445a424f67918" "/opt/rustwide/cargo-home/bin/cargo" "+f42f19b6d3d785a74dbe57aa395b6c288437dd51" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 02c35c7f4461caab8e5f88848b9249dc1ae8420876e36c7fd83999ec5eec4541
[INFO] running `Command { std: "docker" "start" "-a" "02c35c7f4461caab8e5f88848b9249dc1ae8420876e36c7fd83999ec5eec4541", kill_on_drop: false }`
[INFO] [stderr] warning: unused manifest key: package.features
[INFO] [stderr]     Checking ctfp v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `super::chapter1`
[INFO] [stdout]  --> src/chapter7.rs:1:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use super::chapter1;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function `new` is never used
[INFO] [stdout]   --> src/chapter2.rs:21:12
[INFO] [stdout]    |
[INFO] [stdout] 15 | impl<F, A, B> Memoize<F, A, B>
[INFO] [stdout]    | ------------------------------ associated function in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 21 |     pub fn new(f: F) -> Self {
[INFO] [stdout]    |            ^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `id` is never used
[INFO] [stdout]  --> src/chapter4.rs:7:4
[INFO] [stdout]   |
[INFO] [stdout] 7 | fn id<T>(o: T) -> Optional<T> {
[INFO] [stdout]   |    ^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `safe_sqrt` is never used
[INFO] [stdout]   --> src/chapter4.rs:32:4
[INFO] [stdout]    |
[INFO] [stdout] 32 | fn safe_sqrt(n: f64) -> Optional<f64> {
[INFO] [stdout]    |    ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `safe_reciprocal` is never used
[INFO] [stdout]   --> src/chapter4.rs:46:4
[INFO] [stdout]    |
[INFO] [stdout] 46 | fn safe_reciprocal(n: f64) -> Optional<f64> {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Reader` is never constructed
[INFO] [stdout]  --> src/chapter7.rs:4:8
[INFO] [stdout]   |
[INFO] [stdout] 4 | struct Reader<F, R, A>
[INFO] [stdout]   |        ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: methods `map` and `get` are never used
[INFO] [stdout]   --> src/chapter7.rs:19:8
[INFO] [stdout]    |
[INFO] [stdout] 13 | impl<F, R, A> Reader<F, R, A>
[INFO] [stdout]    | ----------------------------- methods in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 19 |     fn map<G, B>(self, mapper: G) -> Reader<Box<dyn Fn(R) -> B>, R, B>
[INFO] [stdout]    |        ^^^
[INFO] [stdout] ...
[INFO] [stdout] 31 |     fn get(self, r: R) -> A {
[INFO] [stdout]    |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Pair` is never constructed
[INFO] [stdout]  --> src/chapter8.rs:1:8
[INFO] [stdout]   |
[INFO] [stdout] 1 | struct Pair<A, B> {
[INFO] [stdout]   |        ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated functions `bimap`, `first`, and `second` are never used
[INFO] [stdout]   --> src/chapter8.rs:7:8
[INFO] [stdout]    |
[INFO] [stdout] 6  | impl<A, B> Pair<A, B> {
[INFO] [stdout]    | --------------------- associated functions in this implementation
[INFO] [stdout] 7  |     fn bimap<F, G, C, D>(f: F, g: G) -> impl Fn(Pair<A, B>) -> Pair<C, D>
[INFO] [stdout]    |        ^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 18 |     fn first<F, C>(f: F) -> impl Fn(Pair<A, B>) -> Pair<C, B>
[INFO] [stdout]    |        ^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 28 |     fn second<G, D>(g: G) -> impl Fn(Pair<A, B>) -> Pair<A, D>
[INFO] [stdout]    |        ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variants `None` and `Cons` are never constructed
[INFO] [stdout]   --> src/chapter8.rs:41:5
[INFO] [stdout]    |
[INFO] [stdout] 40 | enum PreList<A, B> {
[INFO] [stdout]    |      ------- variants in this enum
[INFO] [stdout] 41 |     None(),
[INFO] [stdout]    |     ^^^^
[INFO] [stdout] 42 |     Cons(A, B),
[INFO] [stdout]    |     ^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `PreList` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated functions `bimap`, `first`, and `second` are never used
[INFO] [stdout]   --> src/chapter8.rs:46:8
[INFO] [stdout]    |
[INFO] [stdout] 45 | impl<A, B> PreList<A, B> {
[INFO] [stdout]    | ------------------------ associated functions in this implementation
[INFO] [stdout] 46 |     fn bimap<F, G, C, D>(f: F, g: G) -> impl Fn(PreList<A, B>) -> PreList<C, D>
[INFO] [stdout]    |        ^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 57 |     fn first<F, C>(f: F) -> impl Fn(PreList<A, B>) -> PreList<C, B>
[INFO] [stdout]    |        ^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 69 |     fn second<G, D>(g: G) -> impl Fn(PreList<A, B>) -> PreList<A, D>
[INFO] [stdout]    |        ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 11 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.18s
[INFO] running `Command { std: "docker" "inspect" "02c35c7f4461caab8e5f88848b9249dc1ae8420876e36c7fd83999ec5eec4541", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "02c35c7f4461caab8e5f88848b9249dc1ae8420876e36c7fd83999ec5eec4541", kill_on_drop: false }`
[INFO] [stdout] 02c35c7f4461caab8e5f88848b9249dc1ae8420876e36c7fd83999ec5eec4541