[INFO] cloning repository https://github.com/Qbius/rust-categories
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/Qbius/rust-categories" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FQbius%2Frust-categories", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FQbius%2Frust-categories'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] fb268c92a8fb95313887069409faea016d0210fe
[INFO] checking Qbius/rust-categories/fb268c92a8fb95313887069409faea016d0210fe against master#ab869e094a907cc5d19b4080f22eccaf347f1f95 for pr-129604
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FQbius%2Frust-categories" "/workspace/builds/worker-2-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-2-tc1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/Qbius/rust-categories on toolchain ab869e094a907cc5d19b4080f22eccaf347f1f95
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+ab869e094a907cc5d19b4080f22eccaf347f1f95" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/Qbius/rust-categories
[INFO] finished tweaking git repo https://github.com/Qbius/rust-categories
[INFO] tweaked toml for git repo https://github.com/Qbius/rust-categories written to /workspace/builds/worker-2-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/Qbius/rust-categories 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" "+ab869e094a907cc5d19b4080f22eccaf347f1f95" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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@sha256:923055f121b5182466d55868a8b05e67af8ba4a3a3f6bad814e953ca3cd3ac2a" "/opt/rustwide/cargo-home/bin/cargo" "+ab869e094a907cc5d19b4080f22eccaf347f1f95" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 07513c801a567b05db09adaaa403f97508de952d5d11f8a6864d4379b5efef01
[INFO] running `Command { std: "docker" "start" "-a" "07513c801a567b05db09adaaa403f97508de952d5d11f8a6864d4379b5efef01", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "07513c801a567b05db09adaaa403f97508de952d5d11f8a6864d4379b5efef01", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "07513c801a567b05db09adaaa403f97508de952d5d11f8a6864d4379b5efef01", kill_on_drop: false }`
[INFO] [stdout] 07513c801a567b05db09adaaa403f97508de952d5d11f8a6864d4379b5efef01
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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@sha256:923055f121b5182466d55868a8b05e67af8ba4a3a3f6bad814e953ca3cd3ac2a" "/opt/rustwide/cargo-home/bin/cargo" "+ab869e094a907cc5d19b4080f22eccaf347f1f95" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] a4ae61c1be1754298e5f755deba21b2d151aa6907b05318b55ac6c414b8e9184
[INFO] running `Command { std: "docker" "start" "-a" "a4ae61c1be1754298e5f755deba21b2d151aa6907b05318b55ac6c414b8e9184", kill_on_drop: false }`
[INFO] [stderr]     Checking rust-categories v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused imports: `compose`, `f`, `g`, `h`, and `id`
[INFO] [stdout]  --> src/functors.rs:1:21
[INFO] [stdout]   |
[INFO] [stdout] 1 | use crate::futils::{f, g, h, compose, id};
[INFO] [stdout]   |                     ^  ^  ^  ^^^^^^^  ^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `compose` is never used
[INFO] [stdout]  --> src/futils.rs:1:8
[INFO] [stdout]   |
[INFO] [stdout] 1 | pub fn compose<A, B, C, F1, F2>(f2: F2, f1: F1) -> impl Fn(A) -> C
[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/futils.rs:9:8
[INFO] [stdout]   |
[INFO] [stdout] 9 | pub fn id<T>(o: T) -> T {
[INFO] [stdout]   |        ^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `h` is never used
[INFO] [stdout]   --> src/futils.rs:13:8
[INFO] [stdout]    |
[INFO] [stdout] 13 | pub fn h(n: i32) -> i32 {
[INFO] [stdout]    |        ^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `g` is never used
[INFO] [stdout]   --> src/futils.rs:17:8
[INFO] [stdout]    |
[INFO] [stdout] 17 | pub fn g(n: i32) -> i32 {
[INFO] [stdout]    |        ^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `f` is never used
[INFO] [stdout]   --> src/futils.rs:21:8
[INFO] [stdout]    |
[INFO] [stdout] 21 | pub fn f(n: i32) -> i32 {
[INFO] [stdout]    |        ^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: type alias `Writer` is never used
[INFO] [stdout]  --> src/writer.rs:1:6
[INFO] [stdout]   |
[INFO] [stdout] 1 | type Writer<T> = (T, String);
[INFO] [stdout]   |      ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `to_upper` is never used
[INFO] [stdout]  --> src/writer.rs:3:4
[INFO] [stdout]   |
[INFO] [stdout] 3 | fn to_upper(s: &String) -> Writer<String> {
[INFO] [stdout]   |    ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `words` is never used
[INFO] [stdout]  --> src/writer.rs:7:4
[INFO] [stdout]   |
[INFO] [stdout] 7 | fn words(s: &String) -> Writer<Vec<String>> {
[INFO] [stdout]   |    ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Procedural` is never constructed
[INFO] [stdout]   --> src/writer.rs:11:8
[INFO] [stdout]    |
[INFO] [stdout] 11 | struct Procedural<A> {
[INFO] [stdout]    |        ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `then` is never used
[INFO] [stdout]   --> src/writer.rs:17:8
[INFO] [stdout]    |
[INFO] [stdout] 16 | impl<A> Procedural<A> {
[INFO] [stdout]    | --------------------- method in this implementation
[INFO] [stdout] 17 |     fn then<B>(self, f: impl Fn(&A) -> Writer<B>) -> Procedural<B> {
[INFO] [stdout]    |        ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `proc` is never used
[INFO] [stdout]   --> src/writer.rs:28:4
[INFO] [stdout]    |
[INFO] [stdout] 28 | fn proc<A>(base: A) -> Procedural<A> {
[INFO] [stdout]    |    ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `opt_compose` is never used
[INFO] [stdout]  --> src/optional.rs:1:4
[INFO] [stdout]   |
[INFO] [stdout] 1 | fn opt_compose<A, B, C>(f2: impl Fn(B) -> Option<C>, f1: impl Fn(A) -> Option<B>) -> impl Fn(A) -> Option<C> {
[INFO] [stdout]   |    ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `opt_identity` is never used
[INFO] [stdout]  --> src/optional.rs:8:4
[INFO] [stdout]   |
[INFO] [stdout] 8 | fn opt_identity<A>(obj: A) -> Option<A> {
[INFO] [stdout]   |    ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `safe_root` is never used
[INFO] [stdout]   --> src/optional.rs:12:4
[INFO] [stdout]    |
[INFO] [stdout] 12 | fn safe_root(a: f64) -> Option<f64> {
[INFO] [stdout]    |    ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `safe_reciprocal` is never used
[INFO] [stdout]   --> src/optional.rs:19:4
[INFO] [stdout]    |
[INFO] [stdout] 19 | fn safe_reciprocal(a: f64) -> Option<f64> {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `threedec` is never used
[INFO] [stdout]   --> src/optional.rs:26:4
[INFO] [stdout]    |
[INFO] [stdout] 26 | fn threedec(a: f64) -> Option<f64> {
[INFO] [stdout]    |    ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum `Either` is never used
[INFO] [stdout]  --> src/swap.rs:2:10
[INFO] [stdout]   |
[INFO] [stdout] 2 | pub enum Either<A, B> {
[INFO] [stdout]   |          ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: type alias `Maybe` is never used
[INFO] [stdout]  --> src/swap.rs:7:10
[INFO] [stdout]   |
[INFO] [stdout] 7 | pub type Maybe<A> = Either<(), A>;
[INFO] [stdout]   |          ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `either_to_option` is never used
[INFO] [stdout]  --> src/swap.rs:8:4
[INFO] [stdout]   |
[INFO] [stdout] 8 | fn either_to_option<A>(e: Maybe<A>) -> Option<A> {
[INFO] [stdout]   |    ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `option_to_either` is never used
[INFO] [stdout]   --> src/swap.rs:15:4
[INFO] [stdout]    |
[INFO] [stdout] 15 | fn option_to_either<A>(o: Option<A>) -> Maybe<A> {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `swap` is never used
[INFO] [stdout]   --> src/swap.rs:22:4
[INFO] [stdout]    |
[INFO] [stdout] 22 | fn swap<A, B>((a, b): (A, B)) -> (B, A) {
[INFO] [stdout]    |    ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Pair` is never constructed
[INFO] [stdout]   --> src/swap.rs:26:8
[INFO] [stdout]    |
[INFO] [stdout] 26 | struct Pair<A, B>(A, B);
[INFO] [stdout]    |        ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Element` is never constructed
[INFO] [stdout]   --> src/swap.rs:28:8
[INFO] [stdout]    |
[INFO] [stdout] 28 | struct Element {
[INFO] [stdout]    |        ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated items `from_tuple` and `to_tuple` are never used
[INFO] [stdout]   --> src/swap.rs:35:8
[INFO] [stdout]    |
[INFO] [stdout] 34 | impl Element {
[INFO] [stdout]    | ------------ associated items in this implementation
[INFO] [stdout] 35 |     fn from_tuple((name, symbol, atomic_number): (String, String, u8)) -> Element {
[INFO] [stdout]    |        ^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 43 |     fn to_tuple(self) -> (String, String, u8) {
[INFO] [stdout]    |        ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum `List` is never used
[INFO] [stdout]   --> src/swap.rs:49:6
[INFO] [stdout]    |
[INFO] [stdout] 49 | enum List<A: Display> {
[INFO] [stdout]    |      ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated items `cons` and `to_string` are never used
[INFO] [stdout]   --> src/swap.rs:55:8
[INFO] [stdout]    |
[INFO] [stdout] 54 | impl<A: Display> List<A> {
[INFO] [stdout]    | ------------------------ associated items in this implementation
[INFO] [stdout] 55 |     fn cons(head: A, tail: List<A>) -> List<A> {
[INFO] [stdout]    |        ^^^^
[INFO] [stdout] ...
[INFO] [stdout] 59 |     fn to_string(self) -> String {
[INFO] [stdout]    |        ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum `Shape` is never used
[INFO] [stdout]   --> src/swap.rs:67:6
[INFO] [stdout]    |
[INFO] [stdout] 67 | enum Shape {
[INFO] [stdout]    |      ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: methods `area` and `circ` are never used
[INFO] [stdout]   --> src/swap.rs:75:8
[INFO] [stdout]    |
[INFO] [stdout] 74 | impl Shape {
[INFO] [stdout]    | ---------- methods in this implementation
[INFO] [stdout] 75 |     fn area(&self) -> f64 {
[INFO] [stdout]    |        ^^^^
[INFO] [stdout] ...
[INFO] [stdout] 83 |     fn circ(&self) -> f64 {
[INFO] [stdout]    |        ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `fmap` is never used
[INFO] [stdout]  --> src/functors.rs:3:4
[INFO] [stdout]   |
[INFO] [stdout] 3 | fn fmap<A, B>(f: impl Fn(A) -> B) -> impl Fn(Option<A>) -> Option<B> {
[INFO] [stdout]   |    ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum `Either` is never used
[INFO] [stdout]  --> src/swap.rs:2:10
[INFO] [stdout]   |
[INFO] [stdout] 2 | pub enum Either<A, B> {
[INFO] [stdout]   |          ^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: type alias `Maybe` is never used
[INFO] [stdout]  --> src/swap.rs:7:10
[INFO] [stdout]   |
[INFO] [stdout] 7 | pub type Maybe<A> = Either<(), A>;
[INFO] [stdout]   |          ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `either_to_option` is never used
[INFO] [stdout]  --> src/swap.rs:8:4
[INFO] [stdout]   |
[INFO] [stdout] 8 | fn either_to_option<A>(e: Maybe<A>) -> Option<A> {
[INFO] [stdout]   |    ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `option_to_either` is never used
[INFO] [stdout]   --> src/swap.rs:15:4
[INFO] [stdout]    |
[INFO] [stdout] 15 | fn option_to_either<A>(o: Option<A>) -> Maybe<A> {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Pair` is never constructed
[INFO] [stdout]   --> src/swap.rs:26:8
[INFO] [stdout]    |
[INFO] [stdout] 26 | struct Pair<A, B>(A, B);
[INFO] [stdout]    |        ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Element` is never constructed
[INFO] [stdout]   --> src/swap.rs:28:8
[INFO] [stdout]    |
[INFO] [stdout] 28 | struct Element {
[INFO] [stdout]    |        ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated items `from_tuple` and `to_tuple` are never used
[INFO] [stdout]   --> src/swap.rs:35:8
[INFO] [stdout]    |
[INFO] [stdout] 34 | impl Element {
[INFO] [stdout]    | ------------ associated items in this implementation
[INFO] [stdout] 35 |     fn from_tuple((name, symbol, atomic_number): (String, String, u8)) -> Element {
[INFO] [stdout]    |        ^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 43 |     fn to_tuple(self) -> (String, String, u8) {
[INFO] [stdout]    |        ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum `Shape` is never used
[INFO] [stdout]   --> src/swap.rs:67:6
[INFO] [stdout]    |
[INFO] [stdout] 67 | enum Shape {
[INFO] [stdout]    |      ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: methods `area` and `circ` are never used
[INFO] [stdout]   --> src/swap.rs:75:8
[INFO] [stdout]    |
[INFO] [stdout] 74 | impl Shape {
[INFO] [stdout]    | ---------- methods in this implementation
[INFO] [stdout] 75 |     fn area(&self) -> f64 {
[INFO] [stdout]    |        ^^^^
[INFO] [stdout] ...
[INFO] [stdout] 83 |     fn circ(&self) -> f64 {
[INFO] [stdout]    |        ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 30 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 9 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.20s
[INFO] running `Command { std: "docker" "inspect" "a4ae61c1be1754298e5f755deba21b2d151aa6907b05318b55ac6c414b8e9184", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a4ae61c1be1754298e5f755deba21b2d151aa6907b05318b55ac6c414b8e9184", kill_on_drop: false }`
[INFO] [stdout] a4ae61c1be1754298e5f755deba21b2d151aa6907b05318b55ac6c414b8e9184