[INFO] cloning repository https://github.com/navono/learn_rust
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/navono/learn_rust" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fnavono%2Flearn_rust", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fnavono%2Flearn_rust'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 83e10f3e05a6616ec483a311666a7600dd9687d6
[INFO] testing navono/learn_rust against 1.59.0 for beta-1.60-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fnavono%2Flearn_rust" "/workspace/builds/worker-79/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-79/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/navono/learn_rust on toolchain 1.59.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.59.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/navono/learn_rust
[INFO] finished tweaking git repo https://github.com/navono/learn_rust
[INFO] tweaked toml for git repo https://github.com/navono/learn_rust written to /workspace/builds/worker-79/source/Cargo.toml
[INFO] crate git repo https://github.com/navono/learn_rust already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.59.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[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-79/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-79/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@sha256:0cd99ca24d8e8c98e67c542213511d985b8778b5bdcbb160e038429496686047" "/opt/rustwide/cargo-home/bin/cargo" "+1.59.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] c15e65764767f088cd0016b2e6cef3b4027854e40cc708c7a946721ccd3ecb69
[INFO] running `Command { std: "docker" "start" "-a" "c15e65764767f088cd0016b2e6cef3b4027854e40cc708c7a946721ccd3ecb69", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "c15e65764767f088cd0016b2e6cef3b4027854e40cc708c7a946721ccd3ecb69", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c15e65764767f088cd0016b2e6cef3b4027854e40cc708c7a946721ccd3ecb69", kill_on_drop: false }`
[INFO] [stdout] c15e65764767f088cd0016b2e6cef3b4027854e40cc708c7a946721ccd3ecb69
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-79/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-79/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=warn" "-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@sha256:0cd99ca24d8e8c98e67c542213511d985b8778b5bdcbb160e038429496686047" "/opt/rustwide/cargo-home/bin/cargo" "+1.59.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 9935f3e47fb581953d82de45771ffb1ef3fb966184265f51eeb02f9b0a5656a5
[INFO] running `Command { std: "docker" "start" "-a" "9935f3e47fb581953d82de45771ffb1ef3fb966184265f51eeb02f9b0a5656a5", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling learn_rust v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused doc comment
[INFO] [stdout]   --> src/format/format.rs:78:5
[INFO] [stdout]    |
[INFO] [stdout] 78 | /     /**
[INFO] [stdout] 79 | |       For integral types, this is ignored.
[INFO] [stdout] 80 | |       For floating-point types, this indicates how many digits after the decimal point should be printed.
[INFO] [stdout] 81 | |       There are three possible ways to specify the desired precision:
[INFO] [stdout] ...  |
[INFO] [stdout] 90 | |         refers to the value to print, and the precision must come in the input preceding <arg>.
[INFO] [stdout] 91 | |     */
[INFO] [stdout]    | |______^ rustdoc does not generate documentation for macro invocations
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_doc_comments)]` on by default
[INFO] [stdout]    = help: to document an item produced by a macro, the macro must produce the documentation as part of its expansion
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `Subtract`
[INFO] [stdout]   --> src/types/enums.rs:66:76
[INFO] [stdout]    |
[INFO] [stdout] 66 |     use crate::types::enums::VeryVerboseEnumOfThingsToDoWithNumbers::{Add, Subtract};
[INFO] [stdout]    |                                                                            ^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `modules::super_self::my_mod`
[INFO] [stdout]   --> src/main.rs:11:5
[INFO] [stdout]    |
[INFO] [stdout] 11 | use modules::super_self::my_mod;
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `print_format`
[INFO] [stdout]   --> src/format/format.rs:17:8
[INFO] [stdout]    |
[INFO] [stdout] 17 | pub fn print_format() {
[INFO] [stdout]    |        ^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `print_precision`
[INFO] [stdout]   --> src/format/format.rs:77:4
[INFO] [stdout]    |
[INFO] [stdout] 77 | fn print_precision() {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `print_custom_format`
[INFO] [stdout]    --> src/format/format.rs:169:4
[INFO] [stdout]     |
[INFO] [stdout] 169 | fn print_custom_format() {
[INFO] [stdout]     |    ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `print_closure`
[INFO] [stdout]  --> src/functions/closures.rs:8:8
[INFO] [stdout]   |
[INFO] [stdout] 8 | pub fn print_closure() {
[INFO] [stdout]   |        ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `function`
[INFO] [stdout]  --> src/modules/super_self.rs:1:4
[INFO] [stdout]   |
[INFO] [stdout] 1 | fn function() {
[INFO] [stdout]   |    ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `function`
[INFO] [stdout]  --> src/modules/super_self.rs:6:12
[INFO] [stdout]   |
[INFO] [stdout] 6 |     pub fn function() {
[INFO] [stdout]   |            ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `function`
[INFO] [stdout]   --> src/modules/super_self.rs:12:8
[INFO] [stdout]    |
[INFO] [stdout] 12 |     fn function() {
[INFO] [stdout]    |        ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `function`
[INFO] [stdout]   --> src/modules/super_self.rs:17:16
[INFO] [stdout]    |
[INFO] [stdout] 17 |         pub fn function() {
[INFO] [stdout]    |                ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `indirect_call`
[INFO] [stdout]   --> src/modules/super_self.rs:22:12
[INFO] [stdout]    |
[INFO] [stdout] 22 |     pub fn indirect_call() {
[INFO] [stdout]    |            ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `analyze_slice`
[INFO] [stdout]  --> src/primitives/array.rs:4:4
[INFO] [stdout]   |
[INFO] [stdout] 4 | fn analyze_slice(slice: &[i32]) {
[INFO] [stdout]   |    ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `print_array`
[INFO] [stdout]  --> src/primitives/array.rs:9:8
[INFO] [stdout]   |
[INFO] [stdout] 9 | pub fn print_array() {
[INFO] [stdout]   |        ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `print_primitives`
[INFO] [stdout]  --> src/primitives/basic.rs:1:8
[INFO] [stdout]   |
[INFO] [stdout] 1 | pub fn print_primitives() {
[INFO] [stdout]   |        ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `reverse`
[INFO] [stdout]  --> src/primitives/tuples.rs:2:4
[INFO] [stdout]   |
[INFO] [stdout] 2 | fn reverse(pair: (i32, bool)) -> (bool, i32) {
[INFO] [stdout]   |    ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `print_tuples`
[INFO] [stdout]   --> src/primitives/tuples.rs:13:8
[INFO] [stdout]    |
[INFO] [stdout] 13 | pub fn print_tuples() {
[INFO] [stdout]    |        ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Subtract`
[INFO] [stdout]   --> src/types/enums.rs:34:5
[INFO] [stdout]    |
[INFO] [stdout] 34 |     Subtract,
[INFO] [stdout]    |     ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `name`
[INFO] [stdout]   --> src/types/structs.rs:10:5
[INFO] [stdout]    |
[INFO] [stdout] 10 |     name: String,
[INFO] [stdout]    |     ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `age`
[INFO] [stdout]   --> src/types/structs.rs:11:5
[INFO] [stdout]    |
[INFO] [stdout] 11 |     age: u8,
[INFO] [stdout]    |     ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct is never constructed: `Unit`
[INFO] [stdout]   --> src/types/structs.rs:15:8
[INFO] [stdout]    |
[INFO] [stdout] 15 | struct Unit;
[INFO] [stdout]    |        ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct is never constructed: `Pair`
[INFO] [stdout]   --> src/types/structs.rs:18:8
[INFO] [stdout]    |
[INFO] [stdout] 18 | struct Pair(i32, f32);
[INFO] [stdout]    |        ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `x`
[INFO] [stdout]   --> src/types/structs.rs:22:5
[INFO] [stdout]    |
[INFO] [stdout] 22 |     x: f32,
[INFO] [stdout]    |     ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `y`
[INFO] [stdout]   --> src/types/structs.rs:23:5
[INFO] [stdout]    |
[INFO] [stdout] 23 |     y: f32,
[INFO] [stdout]    |     ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `print_struct`
[INFO] [stdout]   --> src/types/structs.rs:35:8
[INFO] [stdout]    |
[INFO] [stdout] 35 | pub fn print_struct() {
[INFO] [stdout]    |        ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 25 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 5.20s
[INFO] running `Command { std: "docker" "inspect" "9935f3e47fb581953d82de45771ffb1ef3fb966184265f51eeb02f9b0a5656a5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "9935f3e47fb581953d82de45771ffb1ef3fb966184265f51eeb02f9b0a5656a5", kill_on_drop: false }`
[INFO] [stdout] 9935f3e47fb581953d82de45771ffb1ef3fb966184265f51eeb02f9b0a5656a5
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-79/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-79/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=warn" "-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@sha256:0cd99ca24d8e8c98e67c542213511d985b8778b5bdcbb160e038429496686047" "/opt/rustwide/cargo-home/bin/cargo" "+1.59.0" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 0e7568e29f084a5f922a7f2592c24a5035b103083a1e448dff8afd036a0666ec
[INFO] running `Command { std: "docker" "start" "-a" "0e7568e29f084a5f922a7f2592c24a5035b103083a1e448dff8afd036a0666ec", kill_on_drop: false }`
[INFO] [stderr]    Compiling learn_rust v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused doc comment
[INFO] [stdout]   --> src/format/format.rs:78:5
[INFO] [stdout]    |
[INFO] [stdout] 78 | /     /**
[INFO] [stdout] 79 | |       For integral types, this is ignored.
[INFO] [stdout] 80 | |       For floating-point types, this indicates how many digits after the decimal point should be printed.
[INFO] [stdout] 81 | |       There are three possible ways to specify the desired precision:
[INFO] [stdout] ...  |
[INFO] [stdout] 90 | |         refers to the value to print, and the precision must come in the input preceding <arg>.
[INFO] [stdout] 91 | |     */
[INFO] [stdout]    | |______^ rustdoc does not generate documentation for macro invocations
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_doc_comments)]` on by default
[INFO] [stdout]    = help: to document an item produced by a macro, the macro must produce the documentation as part of its expansion
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `Subtract`
[INFO] [stdout]   --> src/types/enums.rs:66:76
[INFO] [stdout]    |
[INFO] [stdout] 66 |     use crate::types::enums::VeryVerboseEnumOfThingsToDoWithNumbers::{Add, Subtract};
[INFO] [stdout]    |                                                                            ^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `modules::super_self::my_mod`
[INFO] [stdout]   --> src/main.rs:11:5
[INFO] [stdout]    |
[INFO] [stdout] 11 | use modules::super_self::my_mod;
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `print_format`
[INFO] [stdout]   --> src/format/format.rs:17:8
[INFO] [stdout]    |
[INFO] [stdout] 17 | pub fn print_format() {
[INFO] [stdout]    |        ^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `print_precision`
[INFO] [stdout]   --> src/format/format.rs:77:4
[INFO] [stdout]    |
[INFO] [stdout] 77 | fn print_precision() {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `print_custom_format`
[INFO] [stdout]    --> src/format/format.rs:169:4
[INFO] [stdout]     |
[INFO] [stdout] 169 | fn print_custom_format() {
[INFO] [stdout]     |    ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `print_closure`
[INFO] [stdout]  --> src/functions/closures.rs:8:8
[INFO] [stdout]   |
[INFO] [stdout] 8 | pub fn print_closure() {
[INFO] [stdout]   |        ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `function`
[INFO] [stdout]  --> src/modules/super_self.rs:1:4
[INFO] [stdout]   |
[INFO] [stdout] 1 | fn function() {
[INFO] [stdout]   |    ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `function`
[INFO] [stdout]  --> src/modules/super_self.rs:6:12
[INFO] [stdout]   |
[INFO] [stdout] 6 |     pub fn function() {
[INFO] [stdout]   |            ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `function`
[INFO] [stdout]   --> src/modules/super_self.rs:12:8
[INFO] [stdout]    |
[INFO] [stdout] 12 |     fn function() {
[INFO] [stdout]    |        ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `function`
[INFO] [stdout]   --> src/modules/super_self.rs:17:16
[INFO] [stdout]    |
[INFO] [stdout] 17 |         pub fn function() {
[INFO] [stdout]    |                ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `indirect_call`
[INFO] [stdout]   --> src/modules/super_self.rs:22:12
[INFO] [stdout]    |
[INFO] [stdout] 22 |     pub fn indirect_call() {
[INFO] [stdout]    |            ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `analyze_slice`
[INFO] [stdout]  --> src/primitives/array.rs:4:4
[INFO] [stdout]   |
[INFO] [stdout] 4 | fn analyze_slice(slice: &[i32]) {
[INFO] [stdout]   |    ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `print_array`
[INFO] [stdout]  --> src/primitives/array.rs:9:8
[INFO] [stdout]   |
[INFO] [stdout] 9 | pub fn print_array() {
[INFO] [stdout]   |        ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `print_primitives`
[INFO] [stdout]  --> src/primitives/basic.rs:1:8
[INFO] [stdout]   |
[INFO] [stdout] 1 | pub fn print_primitives() {
[INFO] [stdout]   |        ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `reverse`
[INFO] [stdout]  --> src/primitives/tuples.rs:2:4
[INFO] [stdout]   |
[INFO] [stdout] 2 | fn reverse(pair: (i32, bool)) -> (bool, i32) {
[INFO] [stdout]   |    ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `print_tuples`
[INFO] [stdout]   --> src/primitives/tuples.rs:13:8
[INFO] [stdout]    |
[INFO] [stdout] 13 | pub fn print_tuples() {
[INFO] [stdout]    |        ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Subtract`
[INFO] [stdout]   --> src/types/enums.rs:34:5
[INFO] [stdout]    |
[INFO] [stdout] 34 |     Subtract,
[INFO] [stdout]    |     ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `name`
[INFO] [stdout]   --> src/types/structs.rs:10:5
[INFO] [stdout]    |
[INFO] [stdout] 10 |     name: String,
[INFO] [stdout]    |     ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `age`
[INFO] [stdout]   --> src/types/structs.rs:11:5
[INFO] [stdout]    |
[INFO] [stdout] 11 |     age: u8,
[INFO] [stdout]    |     ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct is never constructed: `Unit`
[INFO] [stdout]   --> src/types/structs.rs:15:8
[INFO] [stdout]    |
[INFO] [stdout] 15 | struct Unit;
[INFO] [stdout]    |        ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct is never constructed: `Pair`
[INFO] [stdout]   --> src/types/structs.rs:18:8
[INFO] [stdout]    |
[INFO] [stdout] 18 | struct Pair(i32, f32);
[INFO] [stdout]    |        ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `x`
[INFO] [stdout]   --> src/types/structs.rs:22:5
[INFO] [stdout]    |
[INFO] [stdout] 22 |     x: f32,
[INFO] [stdout]    |     ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `y`
[INFO] [stdout]   --> src/types/structs.rs:23:5
[INFO] [stdout]    |
[INFO] [stdout] 23 |     y: f32,
[INFO] [stdout]    |     ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `print_struct`
[INFO] [stdout]   --> src/types/structs.rs:35:8
[INFO] [stdout]    |
[INFO] [stdout] 35 | pub fn print_struct() {
[INFO] [stdout]    |        ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 25 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.46s
[INFO] running `Command { std: "docker" "inspect" "0e7568e29f084a5f922a7f2592c24a5035b103083a1e448dff8afd036a0666ec", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "0e7568e29f084a5f922a7f2592c24a5035b103083a1e448dff8afd036a0666ec", kill_on_drop: false }`
[INFO] [stdout] 0e7568e29f084a5f922a7f2592c24a5035b103083a1e448dff8afd036a0666ec
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-79/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-79/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=warn" "-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@sha256:0cd99ca24d8e8c98e67c542213511d985b8778b5bdcbb160e038429496686047" "/opt/rustwide/cargo-home/bin/cargo" "+1.59.0" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] d0fa1a328087bdf38ba72da968c3d8e5319d9b90e4179f0632e4b44539610033
[INFO] running `Command { std: "docker" "start" "-a" "d0fa1a328087bdf38ba72da968c3d8e5319d9b90e4179f0632e4b44539610033", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr] warning: unused doc comment
[INFO] [stderr]   --> src/format/format.rs:78:5
[INFO] [stderr]    |
[INFO] [stderr] 78 | /     /**
[INFO] [stderr] 79 | |       For integral types, this is ignored.
[INFO] [stderr] 80 | |       For floating-point types, this indicates how many digits after the decimal point should be printed.
[INFO] [stderr] 81 | |       There are three possible ways to specify the desired precision:
[INFO] [stderr] ...  |
[INFO] [stderr] 90 | |         refers to the value to print, and the precision must come in the input preceding <arg>.
[INFO] [stderr] 91 | |     */
[INFO] [stderr]    | |______^ rustdoc does not generate documentation for macro invocations
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_doc_comments)]` on by default
[INFO] [stderr]    = help: to document an item produced by a macro, the macro must produce the documentation as part of its expansion
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `Subtract`
[INFO] [stderr]   --> src/types/enums.rs:66:76
[INFO] [stderr]    |
[INFO] [stderr] 66 |     use crate::types::enums::VeryVerboseEnumOfThingsToDoWithNumbers::{Add, Subtract};
[INFO] [stderr]    |                                                                            ^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `modules::super_self::my_mod`
[INFO] [stderr]   --> src/main.rs:11:5
[INFO] [stderr]    |
[INFO] [stderr] 11 | use modules::super_self::my_mod;
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `print_format`
[INFO] [stderr]   --> src/format/format.rs:17:8
[INFO] [stderr]    |
[INFO] [stderr] 17 | pub fn print_format() {
[INFO] [stderr]    |        ^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `print_precision`
[INFO] [stderr]   --> src/format/format.rs:77:4
[INFO] [stderr]    |
[INFO] [stderr] 77 | fn print_precision() {
[INFO] [stderr]    |    ^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `print_custom_format`
[INFO] [stderr]    --> src/format/format.rs:169:4
[INFO] [stderr]     |
[INFO] [stderr] 169 | fn print_custom_format() {
[INFO] [stderr]     |    ^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `print_closure`
[INFO] [stderr]  --> src/functions/closures.rs:8:8
[INFO] [stderr]   |
[INFO] [stderr] 8 | pub fn print_closure() {
[INFO] [stderr]   |        ^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `function`
[INFO] [stderr]  --> src/modules/super_self.rs:1:4
[INFO] [stderr]   |
[INFO] [stderr] 1 | fn function() {
[INFO] [stderr]   |    ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `function`
[INFO] [stderr]  --> src/modules/super_self.rs:6:12
[INFO] [stderr]   |
[INFO] [stderr] 6 |     pub fn function() {
[INFO] [stderr]   |            ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `function`
[INFO] [stderr]   --> src/modules/super_self.rs:12:8
[INFO] [stderr]    |
[INFO] [stderr] 12 |     fn function() {
[INFO] [stderr]    |        ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `function`
[INFO] [stderr]   --> src/modules/super_self.rs:17:16
[INFO] [stderr]    |
[INFO] [stderr] 17 |         pub fn function() {
[INFO] [stderr]    |                ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `indirect_call`
[INFO] [stderr]   --> src/modules/super_self.rs:22:12
[INFO] [stderr]    |
[INFO] [stderr] 22 |     pub fn indirect_call() {
[INFO] [stderr]    |            ^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `analyze_slice`
[INFO] [stderr]  --> src/primitives/array.rs:4:4
[INFO] [stderr]   |
[INFO] [stderr] 4 | fn analyze_slice(slice: &[i32]) {
[INFO] [stderr]   |    ^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `print_array`
[INFO] [stderr]  --> src/primitives/array.rs:9:8
[INFO] [stderr]   |
[INFO] [stderr] 9 | pub fn print_array() {
[INFO] [stderr]   |        ^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `print_primitives`
[INFO] [stderr]  --> src/primitives/basic.rs:1:8
[INFO] [stderr]   |
[INFO] [stderr] 1 | pub fn print_primitives() {
[INFO] [stderr]   |        ^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `reverse`
[INFO] [stderr]  --> src/primitives/tuples.rs:2:4
[INFO] [stderr]   |
[INFO] [stderr] 2 | fn reverse(pair: (i32, bool)) -> (bool, i32) {
[INFO] [stderr]   |    ^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `print_tuples`
[INFO] [stderr]   --> src/primitives/tuples.rs:13:8
[INFO] [stderr]    |
[INFO] [stderr] 13 | pub fn print_tuples() {
[INFO] [stderr]    |        ^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `Subtract`
[INFO] [stderr]   --> src/types/enums.rs:34:5
[INFO] [stderr]    |
[INFO] [stderr] 34 |     Subtract,
[INFO] [stderr]    |     ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: field is never read: `name`
[INFO] [stderr]   --> src/types/structs.rs:10:5
[INFO] [stderr]    |
[INFO] [stderr] 10 |     name: String,
[INFO] [stderr]    |     ^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: field is never read: `age`
[INFO] [stderr]   --> src/types/structs.rs:11:5
[INFO] [stderr]    |
[INFO] [stderr] 11 |     age: u8,
[INFO] [stderr]    |     ^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `Unit`
[INFO] [stderr]   --> src/types/structs.rs:15:8
[INFO] [stderr]    |
[INFO] [stderr] 15 | struct Unit;
[INFO] [stderr]    |        ^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `Pair`
[INFO] [stderr]   --> src/types/structs.rs:18:8
[INFO] [stderr]    |
[INFO] [stderr] 18 | struct Pair(i32, f32);
[INFO] [stderr]    |        ^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: field is never read: `x`
[INFO] [stderr]   --> src/types/structs.rs:22:5
[INFO] [stderr]    |
[INFO] [stderr] 22 |     x: f32,
[INFO] [stderr]    |     ^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: field is never read: `y`
[INFO] [stderr]   --> src/types/structs.rs:23:5
[INFO] [stderr]    |
[INFO] [stderr] 23 |     y: f32,
[INFO] [stderr]    |     ^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `print_struct`
[INFO] [stderr]   --> src/types/structs.rs:35:8
[INFO] [stderr]    |
[INFO] [stderr] 35 | pub fn print_struct() {
[INFO] [stderr]    |        ^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: `learn_rust` (bin "learn_rust" test) generated 25 warnings
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 3.18s
[INFO] [stderr]      Running unittests (/opt/rustwide/target/debug/deps/learn_rust-909aaa491ae37308)
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "d0fa1a328087bdf38ba72da968c3d8e5319d9b90e4179f0632e4b44539610033", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d0fa1a328087bdf38ba72da968c3d8e5319d9b90e4179f0632e4b44539610033", kill_on_drop: false }`
[INFO] [stdout] d0fa1a328087bdf38ba72da968c3d8e5319d9b90e4179f0632e4b44539610033