[INFO] cloning repository https://github.com/emanguy/rust-presentation-code
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/emanguy/rust-presentation-code" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Femanguy%2Frust-presentation-code", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Femanguy%2Frust-presentation-code'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 05fbae984a837eda6d6b90d23e7cc35629c75e12
[INFO] testing emanguy/rust-presentation-code against 1.60.0 for beta-1.61-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Femanguy%2Frust-presentation-code" "/workspace/builds/worker-8/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-8/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/emanguy/rust-presentation-code on toolchain 1.60.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.60.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/emanguy/rust-presentation-code
[INFO] finished tweaking git repo https://github.com/emanguy/rust-presentation-code
[INFO] tweaked toml for git repo https://github.com/emanguy/rust-presentation-code written to /workspace/builds/worker-8/source/Cargo.toml
[INFO] crate git repo https://github.com/emanguy/rust-presentation-code already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.60.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/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:eaef2f80f755933c374d2ae5edccceec0c1312ceb8a4e0b6404e8ab76561e1e5" "/opt/rustwide/cargo-home/bin/cargo" "+1.60.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 72ce37230773f93a10964e22fe489103428871fd333fa8ceadefb4f78413118d
[INFO] running `Command { std: "docker" "start" "-a" "72ce37230773f93a10964e22fe489103428871fd333fa8ceadefb4f78413118d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "72ce37230773f93a10964e22fe489103428871fd333fa8ceadefb4f78413118d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "72ce37230773f93a10964e22fe489103428871fd333fa8ceadefb4f78413118d", kill_on_drop: false }`
[INFO] [stdout] 72ce37230773f93a10964e22fe489103428871fd333fa8ceadefb4f78413118d
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/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:eaef2f80f755933c374d2ae5edccceec0c1312ceb8a4e0b6404e8ab76561e1e5" "/opt/rustwide/cargo-home/bin/cargo" "+1.60.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 7fc891a3b1565a91e43f7481d2bb3e526e232738fbf9d251291fab464a27182f
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "7fc891a3b1565a91e43f7481d2bb3e526e232738fbf9d251291fab464a27182f", kill_on_drop: false }`
[INFO] [stderr]    Compiling presentation-code v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused variable: `third_num`
[INFO] [stdout]   --> src/p02_variables_mutability.rs:13:9
[INFO] [stdout]    |
[INFO] [stdout] 13 |     let third_num: f32 = 20.5;
[INFO] [stdout]    |         ^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_third_num`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable `result` is assigned to, but never used
[INFO] [stdout]   --> src/p02_variables_mutability.rs:17:13
[INFO] [stdout]    |
[INFO] [stdout] 17 |     let mut result = 0;
[INFO] [stdout]    |             ^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: consider using `_result` instead
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `result` is never read
[INFO] [stdout]   --> src/p02_variables_mutability.rs:18:5
[INFO] [stdout]    |
[INFO] [stdout] 18 |     result = first_num + second_num as i32; // There are no implicit casts either!
[INFO] [stdout]    |     ^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_assignments)]` on by default
[INFO] [stdout]    = help: maybe it is overwritten before being read?
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `acquired_value`
[INFO] [stdout]  --> src/p07_option_result.rs:8:9
[INFO] [stdout]   |
[INFO] [stdout] 8 |     let acquired_value = match value_exists {
[INFO] [stdout]   |         ^^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_acquired_value`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `easier_value_get`
[INFO] [stdout]   --> src/p07_option_result.rs:13:9
[INFO] [stdout]    |
[INFO] [stdout] 13 |     let easier_value_get = value_doesnt_exist.unwrap_or(0);
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_easier_value_get`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `main`
[INFO] [stdout]  --> src/p02_variables_mutability.rs:1:8
[INFO] [stdout]   |
[INFO] [stdout] 1 | pub fn main() {
[INFO] [stdout]   |        ^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct is never constructed: `Person`
[INFO] [stdout]  --> src/p03_structs.rs:2:12
[INFO] [stdout]   |
[INFO] [stdout] 2 | pub struct Person {
[INFO] [stdout]   |            ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `full_name`
[INFO] [stdout]   --> src/p03_structs.rs:10:12
[INFO] [stdout]    |
[INFO] [stdout] 10 |     pub fn full_name(&self) -> String {
[INFO] [stdout]    |            ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `new_john_doe`
[INFO] [stdout]   --> src/p03_structs.rs:17:12
[INFO] [stdout]    |
[INFO] [stdout] 17 |     pub fn new_john_doe() -> Person {
[INFO] [stdout]    |            ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `main`
[INFO] [stdout]   --> src/p03_structs.rs:22:8
[INFO] [stdout]    |
[INFO] [stdout] 22 | pub fn main() {
[INFO] [stdout]    |        ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `x_pos`
[INFO] [stdout]   --> src/p04_traits.rs:53:5
[INFO] [stdout]    |
[INFO] [stdout] 53 |     x_pos: i32,
[INFO] [stdout]    |     ^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout] note: `ClonablePoint` has a derived impl for the trait `Clone`, but this is intentionally ignored during dead code analysis
[INFO] [stdout]   --> src/p04_traits.rs:51:10
[INFO] [stdout]    |
[INFO] [stdout] 51 | #[derive(Clone)]
[INFO] [stdout]    |          ^^^^^
[INFO] [stdout]    = note: this warning originates in the derive macro `Clone` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `y_pos`
[INFO] [stdout]   --> src/p04_traits.rs:54:5
[INFO] [stdout]    |
[INFO] [stdout] 54 |     y_pos: i32
[INFO] [stdout]    |     ^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout] note: `ClonablePoint` has a derived impl for the trait `Clone`, but this is intentionally ignored during dead code analysis
[INFO] [stdout]   --> src/p04_traits.rs:51:10
[INFO] [stdout]    |
[INFO] [stdout] 51 | #[derive(Clone)]
[INFO] [stdout]    |          ^^^^^
[INFO] [stdout]    = note: this warning originates in the derive macro `Clone` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `magnitude_of`
[INFO] [stdout]   --> src/p04_traits.rs:58:4
[INFO] [stdout]    |
[INFO] [stdout] 58 | fn magnitude_of(with_magnitude: impl Magnitude) -> f64 {
[INFO] [stdout]    |    ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `main`
[INFO] [stdout]   --> src/p04_traits.rs:62:8
[INFO] [stdout]    |
[INFO] [stdout] 62 | pub fn main() {
[INFO] [stdout]    |        ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `main`
[INFO] [stdout]  --> src/p05_collections_iteration.rs:1:8
[INFO] [stdout]   |
[INFO] [stdout] 1 | pub fn main() {
[INFO] [stdout]   |        ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `main`
[INFO] [stdout]  --> src/p06_pattern_matching_enums.rs:3:8
[INFO] [stdout]   |
[INFO] [stdout] 3 | pub fn main() {
[INFO] [stdout]   |        ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Red`
[INFO] [stdout]   --> src/p06_pattern_matching_enums.rs:42:5
[INFO] [stdout]    |
[INFO] [stdout] 42 |     Red,
[INFO] [stdout]    |     ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Green`
[INFO] [stdout]   --> src/p06_pattern_matching_enums.rs:43:5
[INFO] [stdout]    |
[INFO] [stdout] 43 |     Green,
[INFO] [stdout]    |     ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Blue`
[INFO] [stdout]   --> src/p06_pattern_matching_enums.rs:44:5
[INFO] [stdout]    |
[INFO] [stdout] 44 |     Blue,
[INFO] [stdout]    |     ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `RGB`
[INFO] [stdout]   --> src/p06_pattern_matching_enums.rs:45:5
[INFO] [stdout]    |
[INFO] [stdout] 45 |     RGB(i32, i32, i32), // This enum value holds a tuple of 3 numbers
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `RGBA`
[INFO] [stdout]   --> src/p06_pattern_matching_enums.rs:46:5
[INFO] [stdout]    |
[INFO] [stdout] 46 | /     RGBA { // This enum value holds values like a struct
[INFO] [stdout] 47 | |         r: i32, 
[INFO] [stdout] 48 | |         g: i32, 
[INFO] [stdout] 49 | |         b: i32, 
[INFO] [stdout] 50 | |         a: i32,
[INFO] [stdout] 51 | |     }, 
[INFO] [stdout]    | |_____^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `main`
[INFO] [stdout]  --> src/p07_option_result.rs:1:8
[INFO] [stdout]   |
[INFO] [stdout] 1 | pub fn main() {
[INFO] [stdout]   |        ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum is never used: `DbError`
[INFO] [stdout]   --> src/p07_option_result.rs:32:6
[INFO] [stdout]    |
[INFO] [stdout] 32 | enum DbError {
[INFO] [stdout]    |      ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `database_operation_fails`
[INFO] [stdout]   --> src/p07_option_result.rs:37:4
[INFO] [stdout]    |
[INFO] [stdout] 37 | fn database_operation_fails() -> Result<Vec<i32>, DbError> {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `database_lookup_v1`
[INFO] [stdout]   --> src/p07_option_result.rs:42:4
[INFO] [stdout]    |
[INFO] [stdout] 42 | fn database_lookup_v1() -> Result<i32, DbError> {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `database_lookup_v2`
[INFO] [stdout]   --> src/p07_option_result.rs:52:4
[INFO] [stdout]    |
[INFO] [stdout] 52 | fn database_lookup_v2() -> Result<i32, DbError> {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `add_numbers`
[INFO] [stdout]  --> src/bonus_tests.rs:1:4
[INFO] [stdout]   |
[INFO] [stdout] 1 | fn add_numbers(first_num: i32, second_num: i32) -> i32 {
[INFO] [stdout]   |    ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 27 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 2.03s
[INFO] running `Command { std: "docker" "inspect" "7fc891a3b1565a91e43f7481d2bb3e526e232738fbf9d251291fab464a27182f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "7fc891a3b1565a91e43f7481d2bb3e526e232738fbf9d251291fab464a27182f", kill_on_drop: false }`
[INFO] [stdout] 7fc891a3b1565a91e43f7481d2bb3e526e232738fbf9d251291fab464a27182f
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/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:eaef2f80f755933c374d2ae5edccceec0c1312ceb8a4e0b6404e8ab76561e1e5" "/opt/rustwide/cargo-home/bin/cargo" "+1.60.0" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 411f361924c4dcd873fe23f4ef661460f4a1a727023ea42fa807a74f342c1ae8
[INFO] running `Command { std: "docker" "start" "-a" "411f361924c4dcd873fe23f4ef661460f4a1a727023ea42fa807a74f342c1ae8", kill_on_drop: false }`
[INFO] [stderr]    Compiling presentation-code v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused variable: `third_num`
[INFO] [stdout]   --> src/p02_variables_mutability.rs:13:9
[INFO] [stdout]    |
[INFO] [stdout] 13 |     let third_num: f32 = 20.5;
[INFO] [stdout]    |         ^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_third_num`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable `result` is assigned to, but never used
[INFO] [stdout]   --> src/p02_variables_mutability.rs:17:13
[INFO] [stdout]    |
[INFO] [stdout] 17 |     let mut result = 0;
[INFO] [stdout]    |             ^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: consider using `_result` instead
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `result` is never read
[INFO] [stdout]   --> src/p02_variables_mutability.rs:18:5
[INFO] [stdout]    |
[INFO] [stdout] 18 |     result = first_num + second_num as i32; // There are no implicit casts either!
[INFO] [stdout]    |     ^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_assignments)]` on by default
[INFO] [stdout]    = help: maybe it is overwritten before being read?
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `acquired_value`
[INFO] [stdout]  --> src/p07_option_result.rs:8:9
[INFO] [stdout]   |
[INFO] [stdout] 8 |     let acquired_value = match value_exists {
[INFO] [stdout]   |         ^^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_acquired_value`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `easier_value_get`
[INFO] [stdout]   --> src/p07_option_result.rs:13:9
[INFO] [stdout]    |
[INFO] [stdout] 13 |     let easier_value_get = value_doesnt_exist.unwrap_or(0);
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_easier_value_get`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `main`
[INFO] [stdout]  --> src/p02_variables_mutability.rs:1:8
[INFO] [stdout]   |
[INFO] [stdout] 1 | pub fn main() {
[INFO] [stdout]   |        ^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct is never constructed: `Person`
[INFO] [stdout]  --> src/p03_structs.rs:2:12
[INFO] [stdout]   |
[INFO] [stdout] 2 | pub struct Person {
[INFO] [stdout]   |            ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `full_name`
[INFO] [stdout]   --> src/p03_structs.rs:10:12
[INFO] [stdout]    |
[INFO] [stdout] 10 |     pub fn full_name(&self) -> String {
[INFO] [stdout]    |            ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `new_john_doe`
[INFO] [stdout]   --> src/p03_structs.rs:17:12
[INFO] [stdout]    |
[INFO] [stdout] 17 |     pub fn new_john_doe() -> Person {
[INFO] [stdout]    |            ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `main`
[INFO] [stdout]   --> src/p03_structs.rs:22:8
[INFO] [stdout]    |
[INFO] [stdout] 22 | pub fn main() {
[INFO] [stdout]    |        ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `x_pos`
[INFO] [stdout]   --> src/p04_traits.rs:53:5
[INFO] [stdout]    |
[INFO] [stdout] 53 |     x_pos: i32,
[INFO] [stdout]    |     ^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout] note: `ClonablePoint` has a derived impl for the trait `Clone`, but this is intentionally ignored during dead code analysis
[INFO] [stdout]   --> src/p04_traits.rs:51:10
[INFO] [stdout]    |
[INFO] [stdout] 51 | #[derive(Clone)]
[INFO] [stdout]    |          ^^^^^
[INFO] [stdout]    = note: this warning originates in the derive macro `Clone` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `y_pos`
[INFO] [stdout]   --> src/p04_traits.rs:54:5
[INFO] [stdout]    |
[INFO] [stdout] 54 |     y_pos: i32
[INFO] [stdout]    |     ^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout] note: `ClonablePoint` has a derived impl for the trait `Clone`, but this is intentionally ignored during dead code analysis
[INFO] [stdout]   --> src/p04_traits.rs:51:10
[INFO] [stdout]    |
[INFO] [stdout] 51 | #[derive(Clone)]
[INFO] [stdout]    |          ^^^^^
[INFO] [stdout]    = note: this warning originates in the derive macro `Clone` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `magnitude_of`
[INFO] [stdout]   --> src/p04_traits.rs:58:4
[INFO] [stdout]    |
[INFO] [stdout] 58 | fn magnitude_of(with_magnitude: impl Magnitude) -> f64 {
[INFO] [stdout]    |    ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `main`
[INFO] [stdout]   --> src/p04_traits.rs:62:8
[INFO] [stdout]    |
[INFO] [stdout] 62 | pub fn main() {
[INFO] [stdout]    |        ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `main`
[INFO] [stdout]  --> src/p05_collections_iteration.rs:1:8
[INFO] [stdout]   |
[INFO] [stdout] 1 | pub fn main() {
[INFO] [stdout]   |        ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `main`
[INFO] [stdout]  --> src/p06_pattern_matching_enums.rs:3:8
[INFO] [stdout]   |
[INFO] [stdout] 3 | pub fn main() {
[INFO] [stdout]   |        ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Red`
[INFO] [stdout]   --> src/p06_pattern_matching_enums.rs:42:5
[INFO] [stdout]    |
[INFO] [stdout] 42 |     Red,
[INFO] [stdout]    |     ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Green`
[INFO] [stdout]   --> src/p06_pattern_matching_enums.rs:43:5
[INFO] [stdout]    |
[INFO] [stdout] 43 |     Green,
[INFO] [stdout]    |     ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Blue`
[INFO] [stdout]   --> src/p06_pattern_matching_enums.rs:44:5
[INFO] [stdout]    |
[INFO] [stdout] 44 |     Blue,
[INFO] [stdout]    |     ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `RGB`
[INFO] [stdout]   --> src/p06_pattern_matching_enums.rs:45:5
[INFO] [stdout]    |
[INFO] [stdout] 45 |     RGB(i32, i32, i32), // This enum value holds a tuple of 3 numbers
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `RGBA`
[INFO] [stdout]   --> src/p06_pattern_matching_enums.rs:46:5
[INFO] [stdout]    |
[INFO] [stdout] 46 | /     RGBA { // This enum value holds values like a struct
[INFO] [stdout] 47 | |         r: i32, 
[INFO] [stdout] 48 | |         g: i32, 
[INFO] [stdout] 49 | |         b: i32, 
[INFO] [stdout] 50 | |         a: i32,
[INFO] [stdout] 51 | |     }, 
[INFO] [stdout]    | |_____^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `main`
[INFO] [stdout]  --> src/p07_option_result.rs:1:8
[INFO] [stdout]   |
[INFO] [stdout] 1 | pub fn main() {
[INFO] [stdout]   |        ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum is never used: `DbError`
[INFO] [stdout]   --> src/p07_option_result.rs:32:6
[INFO] [stdout]    |
[INFO] [stdout] 32 | enum DbError {
[INFO] [stdout]    |      ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `database_operation_fails`
[INFO] [stdout]   --> src/p07_option_result.rs:37:4
[INFO] [stdout]    |
[INFO] [stdout] 37 | fn database_operation_fails() -> Result<Vec<i32>, DbError> {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `database_lookup_v1`
[INFO] [stdout]   --> src/p07_option_result.rs:42:4
[INFO] [stdout]    |
[INFO] [stdout] 42 | fn database_lookup_v1() -> Result<i32, DbError> {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `database_lookup_v2`
[INFO] [stdout]   --> src/p07_option_result.rs:52:4
[INFO] [stdout]    |
[INFO] [stdout] 52 | fn database_lookup_v2() -> Result<i32, DbError> {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 26 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 1.13s
[INFO] running `Command { std: "docker" "inspect" "411f361924c4dcd873fe23f4ef661460f4a1a727023ea42fa807a74f342c1ae8", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "411f361924c4dcd873fe23f4ef661460f4a1a727023ea42fa807a74f342c1ae8", kill_on_drop: false }`
[INFO] [stdout] 411f361924c4dcd873fe23f4ef661460f4a1a727023ea42fa807a74f342c1ae8
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/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:eaef2f80f755933c374d2ae5edccceec0c1312ceb8a4e0b6404e8ab76561e1e5" "/opt/rustwide/cargo-home/bin/cargo" "+1.60.0" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] 57c4fbd71b2edebe359a75fae4db282ea6c0e52f2b59563c240128ab9ab75923
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "57c4fbd71b2edebe359a75fae4db282ea6c0e52f2b59563c240128ab9ab75923", kill_on_drop: false }`
[INFO] [stderr] warning: unused variable: `third_num`
[INFO] [stdout] 
[INFO] [stderr]   --> src/p02_variables_mutability.rs:13:9
[INFO] [stdout] running 1 test
[INFO] [stderr]    |
[INFO] [stdout] test bonus_tests::my_test_suite::successfully_adds_numbers ... ok
[INFO] [stderr] 13 |     let third_num: f32 = 20.5;
[INFO] [stdout] 
[INFO] [stderr]    |         ^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_third_num`
[INFO] [stdout] test result: ok. 1 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stderr]    |
[INFO] [stdout] 
[INFO] [stderr]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: variable `result` is assigned to, but never used
[INFO] [stderr]   --> src/p02_variables_mutability.rs:17:13
[INFO] [stderr]    |
[INFO] [stderr] 17 |     let mut result = 0;
[INFO] [stderr]    |             ^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: consider using `_result` instead
[INFO] [stderr] 
[INFO] [stderr] warning: value assigned to `result` is never read
[INFO] [stderr]   --> src/p02_variables_mutability.rs:18:5
[INFO] [stderr]    |
[INFO] [stderr] 18 |     result = first_num + second_num as i32; // There are no implicit casts either!
[INFO] [stderr]    |     ^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_assignments)]` on by default
[INFO] [stderr]    = help: maybe it is overwritten before being read?
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `acquired_value`
[INFO] [stderr]  --> src/p07_option_result.rs:8:9
[INFO] [stderr]   |
[INFO] [stderr] 8 |     let acquired_value = match value_exists {
[INFO] [stderr]   |         ^^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_acquired_value`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `easier_value_get`
[INFO] [stderr]   --> src/p07_option_result.rs:13:9
[INFO] [stderr]    |
[INFO] [stderr] 13 |     let easier_value_get = value_doesnt_exist.unwrap_or(0);
[INFO] [stderr]    |         ^^^^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_easier_value_get`
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `main`
[INFO] [stderr]  --> src/p02_variables_mutability.rs:1:8
[INFO] [stderr]   |
[INFO] [stderr] 1 | pub fn main() {
[INFO] [stderr]   |        ^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `Person`
[INFO] [stderr]  --> src/p03_structs.rs:2:12
[INFO] [stderr]   |
[INFO] [stderr] 2 | pub struct Person {
[INFO] [stderr]   |            ^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `full_name`
[INFO] [stderr]   --> src/p03_structs.rs:10:12
[INFO] [stderr]    |
[INFO] [stderr] 10 |     pub fn full_name(&self) -> String {
[INFO] [stderr]    |            ^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `new_john_doe`
[INFO] [stderr]   --> src/p03_structs.rs:17:12
[INFO] [stderr]    |
[INFO] [stderr] 17 |     pub fn new_john_doe() -> Person {
[INFO] [stderr]    |            ^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `main`
[INFO] [stderr]   --> src/p03_structs.rs:22:8
[INFO] [stderr]    |
[INFO] [stderr] 22 | pub fn main() {
[INFO] [stderr]    |        ^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: field is never read: `x_pos`
[INFO] [stderr]   --> src/p04_traits.rs:53:5
[INFO] [stderr]    |
[INFO] [stderr] 53 |     x_pos: i32,
[INFO] [stderr]    |     ^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr] note: `ClonablePoint` has a derived impl for the trait `Clone`, but this is intentionally ignored during dead code analysis
[INFO] [stderr]   --> src/p04_traits.rs:51:10
[INFO] [stderr]    |
[INFO] [stderr] 51 | #[derive(Clone)]
[INFO] [stderr]    |          ^^^^^
[INFO] [stderr]    = note: this warning originates in the derive macro `Clone` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: field is never read: `y_pos`
[INFO] [stderr]   --> src/p04_traits.rs:54:5
[INFO] [stderr]    |
[INFO] [stderr] 54 |     y_pos: i32
[INFO] [stderr]    |     ^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr] note: `ClonablePoint` has a derived impl for the trait `Clone`, but this is intentionally ignored during dead code analysis
[INFO] [stderr]   --> src/p04_traits.rs:51:10
[INFO] [stderr]    |
[INFO] [stderr] 51 | #[derive(Clone)]
[INFO] [stderr]    |          ^^^^^
[INFO] [stderr]    = note: this warning originates in the derive macro `Clone` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `magnitude_of`
[INFO] [stderr]   --> src/p04_traits.rs:58:4
[INFO] [stderr]    |
[INFO] [stderr] 58 | fn magnitude_of(with_magnitude: impl Magnitude) -> f64 {
[INFO] [stderr]    |    ^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `main`
[INFO] [stderr]   --> src/p04_traits.rs:62:8
[INFO] [stderr]    |
[INFO] [stderr] 62 | pub fn main() {
[INFO] [stderr]    |        ^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `main`
[INFO] [stderr]  --> src/p05_collections_iteration.rs:1:8
[INFO] [stderr]   |
[INFO] [stderr] 1 | pub fn main() {
[INFO] [stderr]   |        ^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `main`
[INFO] [stderr]  --> src/p06_pattern_matching_enums.rs:3:8
[INFO] [stderr]   |
[INFO] [stderr] 3 | pub fn main() {
[INFO] [stderr]   |        ^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `Red`
[INFO] [stderr]   --> src/p06_pattern_matching_enums.rs:42:5
[INFO] [stderr]    |
[INFO] [stderr] 42 |     Red,
[INFO] [stderr]    |     ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `Green`
[INFO] [stderr]   --> src/p06_pattern_matching_enums.rs:43:5
[INFO] [stderr]    |
[INFO] [stderr] 43 |     Green,
[INFO] [stderr]    |     ^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `Blue`
[INFO] [stderr]   --> src/p06_pattern_matching_enums.rs:44:5
[INFO] [stderr]    |
[INFO] [stderr] 44 |     Blue,
[INFO] [stderr]    |     ^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `RGB`
[INFO] [stderr]   --> src/p06_pattern_matching_enums.rs:45:5
[INFO] [stderr]    |
[INFO] [stderr] 45 |     RGB(i32, i32, i32), // This enum value holds a tuple of 3 numbers
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `RGBA`
[INFO] [stderr]   --> src/p06_pattern_matching_enums.rs:46:5
[INFO] [stderr]    |
[INFO] [stderr] 46 | /     RGBA { // This enum value holds values like a struct
[INFO] [stderr] 47 | |         r: i32, 
[INFO] [stderr] 48 | |         g: i32, 
[INFO] [stderr] 49 | |         b: i32, 
[INFO] [stderr] 50 | |         a: i32,
[INFO] [stderr] 51 | |     }, 
[INFO] [stderr]    | |_____^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `main`
[INFO] [stderr]  --> src/p07_option_result.rs:1:8
[INFO] [stderr]   |
[INFO] [stderr] 1 | pub fn main() {
[INFO] [stderr]   |        ^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: enum is never used: `DbError`
[INFO] [stderr]   --> src/p07_option_result.rs:32:6
[INFO] [stderr]    |
[INFO] [stderr] 32 | enum DbError {
[INFO] [stderr]    |      ^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `database_operation_fails`
[INFO] [stderr]   --> src/p07_option_result.rs:37:4
[INFO] [stderr]    |
[INFO] [stderr] 37 | fn database_operation_fails() -> Result<Vec<i32>, DbError> {
[INFO] [stderr]    |    ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `database_lookup_v1`
[INFO] [stderr]   --> src/p07_option_result.rs:42:4
[INFO] [stderr]    |
[INFO] [stderr] 42 | fn database_lookup_v1() -> Result<i32, DbError> {
[INFO] [stderr]    |    ^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `database_lookup_v2`
[INFO] [stderr]   --> src/p07_option_result.rs:52:4
[INFO] [stderr]    |
[INFO] [stderr] 52 | fn database_lookup_v2() -> Result<i32, DbError> {
[INFO] [stderr]    |    ^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: `presentation-code` (bin "presentation-code" test) generated 26 warnings
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.01s
[INFO] [stderr]      Running unittests (/opt/rustwide/target/debug/deps/presentation_code-f8e7e337e6321e48)
[INFO] running `Command { std: "docker" "inspect" "57c4fbd71b2edebe359a75fae4db282ea6c0e52f2b59563c240128ab9ab75923", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "57c4fbd71b2edebe359a75fae4db282ea6c0e52f2b59563c240128ab9ab75923", kill_on_drop: false }`
[INFO] [stdout] 57c4fbd71b2edebe359a75fae4db282ea6c0e52f2b59563c240128ab9ab75923