[INFO] cloning repository https://github.com/mohdazlanabas/rust_designpatterns
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/mohdazlanabas/rust_designpatterns" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmohdazlanabas%2Frust_designpatterns", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmohdazlanabas%2Frust_designpatterns'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] d5a88ffe9b7fadf39562d09040d2273cdf952c96
[INFO] testing mohdazlanabas/rust_designpatterns against master#1f7f8ea0721a3b1eb73e6c6d25cccb371434b320 for pr-154065-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmohdazlanabas%2Frust_designpatterns" "/workspace/builds/worker-4-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-4-tc1/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/mohdazlanabas/rust_designpatterns
[INFO] finished tweaking git repo https://github.com/mohdazlanabas/rust_designpatterns
[INFO] tweaked toml for git repo https://github.com/mohdazlanabas/rust_designpatterns written to /workspace/builds/worker-4-tc1/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/mohdazlanabas/rust_designpatterns on toolchain 1f7f8ea0721a3b1eb73e6c6d25cccb371434b320
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1f7f8ea0721a3b1eb73e6c6d25cccb371434b320" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/mohdazlanabas/rust_designpatterns 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" "+1f7f8ea0721a3b1eb73e6c6d25cccb371434b320" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+1f7f8ea0721a3b1eb73e6c6d25cccb371434b320" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] d695a73e2a0225e8f31726c21d40c2a7a701cc7e1756fb912532ebd33db7411c
[INFO] running `Command { std: "docker" "start" "-a" "d695a73e2a0225e8f31726c21d40c2a7a701cc7e1756fb912532ebd33db7411c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "d695a73e2a0225e8f31726c21d40c2a7a701cc7e1756fb912532ebd33db7411c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d695a73e2a0225e8f31726c21d40c2a7a701cc7e1756fb912532ebd33db7411c", kill_on_drop: false }`
[INFO] [stdout] d695a73e2a0225e8f31726c21d40c2a7a701cc7e1756fb912532ebd33db7411c
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+1f7f8ea0721a3b1eb73e6c6d25cccb371434b320" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 6bcbdadbdb54bacb8efd81b1186a219aac2f4f6ecda7c61bae7bf990e88997ff
[INFO] running `Command { std: "docker" "start" "-a" "6bcbdadbdb54bacb8efd81b1186a219aac2f4f6ecda7c61bae7bf990e88997ff", kill_on_drop: false }`
[INFO] [stderr]    Compiling design_patterns_showcase v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: fields `walls`, `doors`, `windows`, `roof`, and `garage` are never read
[INFO] [stdout]  --> src/creational/builder.rs:5:5
[INFO] [stdout]   |
[INFO] [stdout] 4 | pub struct House {
[INFO] [stdout]   |            ----- fields in this struct
[INFO] [stdout] 5 |     walls: String,
[INFO] [stdout]   |     ^^^^^
[INFO] [stdout] 6 |     doors: u32,
[INFO] [stdout]   |     ^^^^^
[INFO] [stdout] 7 |     windows: u32,
[INFO] [stdout]   |     ^^^^^^^
[INFO] [stdout] 8 |     roof: String,
[INFO] [stdout]   |     ^^^^
[INFO] [stdout] 9 |     garage: bool,
[INFO] [stdout]   |     ^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `House` has derived impls for the traits `Clone` and `Debug`, but these are intentionally ignored during dead code analysis
[INFO] [stdout]   = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `format` is never read
[INFO] [stdout]  --> src/creational/prototype.rs:7:5
[INFO] [stdout]   |
[INFO] [stdout] 4 | pub struct Document {
[INFO] [stdout]   |            -------- field in this struct
[INFO] [stdout] ...
[INFO] [stdout] 7 |     format: String,
[INFO] [stdout]   |     ^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `Document` has derived impls for the traits `Debug` and `Clone`, but these are intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `texture` is never read
[INFO] [stdout]   --> src/structural/flyweight.rs:10:5
[INFO] [stdout]    |
[INFO] [stdout]  7 | struct TreeType {
[INFO] [stdout]    |        -------- field in this struct
[INFO] [stdout] ...
[INFO] [stdout] 10 |     texture: String,
[INFO] [stdout]    |     ^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `TreeType` has a derived impl for the trait `Clone`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `set_next` is never used
[INFO] [stdout]  --> src/behavioral/chain_of_responsibility.rs:4:8
[INFO] [stdout]   |
[INFO] [stdout] 3 | trait Handler {
[INFO] [stdout]   |       ------- method in this trait
[INFO] [stdout] 4 |     fn set_next(&mut self, handler: Box<dyn Handler>) -> &mut dyn Handler;
[INFO] [stdout]   |        ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `BaseHandler` is never constructed
[INFO] [stdout]  --> src/behavioral/chain_of_responsibility.rs:8:8
[INFO] [stdout]   |
[INFO] [stdout] 8 | struct BaseHandler {
[INFO] [stdout]   |        ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function `new` is never used
[INFO] [stdout]   --> src/behavioral/chain_of_responsibility.rs:13:8
[INFO] [stdout]    |
[INFO] [stdout] 12 | impl BaseHandler {
[INFO] [stdout]    | ---------------- associated function in this implementation
[INFO] [stdout] 13 |     fn new() -> Self {
[INFO] [stdout]    |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `set_strategy` is never used
[INFO] [stdout]   --> src/behavioral/strategy.rs:42:8
[INFO] [stdout]    |
[INFO] [stdout] 37 | impl Sorter {
[INFO] [stdout]    | ----------- method in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 42 |     fn set_strategy(&mut self, strategy: Box<dyn SortStrategy>) {
[INFO] [stdout]    |        ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]   --> src/behavioral/iterator.rs:28:13
[INFO] [stdout]    |
[INFO] [stdout] 28 |     fn iter(&self) -> BookIterator {
[INFO] [stdout]    |             ^^^^^     ^^^^^^^^^^^^ the same lifetime is hidden here
[INFO] [stdout]    |             |
[INFO] [stdout]    |             the lifetime is elided here
[INFO] [stdout]    |
[INFO] [stdout]    = help: the same lifetime is referred to in inconsistent ways, making the signature confusing
[INFO] [stdout]    = note: `#[warn(mismatched_lifetime_syntaxes)]` on by default
[INFO] [stdout] help: use `'_` for type paths
[INFO] [stdout]    |
[INFO] [stdout] 28 |     fn iter(&self) -> BookIterator<'_> {
[INFO] [stdout]    |                                   ++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 1.24s
[INFO] running `Command { std: "docker" "inspect" "6bcbdadbdb54bacb8efd81b1186a219aac2f4f6ecda7c61bae7bf990e88997ff", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "6bcbdadbdb54bacb8efd81b1186a219aac2f4f6ecda7c61bae7bf990e88997ff", kill_on_drop: false }`
[INFO] [stdout] 6bcbdadbdb54bacb8efd81b1186a219aac2f4f6ecda7c61bae7bf990e88997ff
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+1f7f8ea0721a3b1eb73e6c6d25cccb371434b320" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 4c5ab1a5eb71737f47d0ad59eae6b3c8c32d360cf392710b7e1f341705e00927
[INFO] running `Command { std: "docker" "start" "-a" "4c5ab1a5eb71737f47d0ad59eae6b3c8c32d360cf392710b7e1f341705e00927", kill_on_drop: false }`
[INFO] [stderr]    Compiling design_patterns_showcase v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: fields `walls`, `doors`, `windows`, `roof`, and `garage` are never read
[INFO] [stdout]  --> src/creational/builder.rs:5:5
[INFO] [stdout]   |
[INFO] [stdout] 4 | pub struct House {
[INFO] [stdout]   |            ----- fields in this struct
[INFO] [stdout] 5 |     walls: String,
[INFO] [stdout]   |     ^^^^^
[INFO] [stdout] 6 |     doors: u32,
[INFO] [stdout]   |     ^^^^^
[INFO] [stdout] 7 |     windows: u32,
[INFO] [stdout]   |     ^^^^^^^
[INFO] [stdout] 8 |     roof: String,
[INFO] [stdout]   |     ^^^^
[INFO] [stdout] 9 |     garage: bool,
[INFO] [stdout]   |     ^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `House` has derived impls for the traits `Clone` and `Debug`, but these are intentionally ignored during dead code analysis
[INFO] [stdout]   = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `format` is never read
[INFO] [stdout]  --> src/creational/prototype.rs:7:5
[INFO] [stdout]   |
[INFO] [stdout] 4 | pub struct Document {
[INFO] [stdout]   |            -------- field in this struct
[INFO] [stdout] ...
[INFO] [stdout] 7 |     format: String,
[INFO] [stdout]   |     ^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `Document` has derived impls for the traits `Debug` and `Clone`, but these are intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `texture` is never read
[INFO] [stdout]   --> src/structural/flyweight.rs:10:5
[INFO] [stdout]    |
[INFO] [stdout]  7 | struct TreeType {
[INFO] [stdout]    |        -------- field in this struct
[INFO] [stdout] ...
[INFO] [stdout] 10 |     texture: String,
[INFO] [stdout]    |     ^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `TreeType` has a derived impl for the trait `Clone`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `set_next` is never used
[INFO] [stdout]  --> src/behavioral/chain_of_responsibility.rs:4:8
[INFO] [stdout]   |
[INFO] [stdout] 3 | trait Handler {
[INFO] [stdout]   |       ------- method in this trait
[INFO] [stdout] 4 |     fn set_next(&mut self, handler: Box<dyn Handler>) -> &mut dyn Handler;
[INFO] [stdout]   |        ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `BaseHandler` is never constructed
[INFO] [stdout]  --> src/behavioral/chain_of_responsibility.rs:8:8
[INFO] [stdout]   |
[INFO] [stdout] 8 | struct BaseHandler {
[INFO] [stdout]   |        ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function `new` is never used
[INFO] [stdout]   --> src/behavioral/chain_of_responsibility.rs:13:8
[INFO] [stdout]    |
[INFO] [stdout] 12 | impl BaseHandler {
[INFO] [stdout]    | ---------------- associated function in this implementation
[INFO] [stdout] 13 |     fn new() -> Self {
[INFO] [stdout]    |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `set_strategy` is never used
[INFO] [stdout]   --> src/behavioral/strategy.rs:42:8
[INFO] [stdout]    |
[INFO] [stdout] 37 | impl Sorter {
[INFO] [stdout]    | ----------- method in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 42 |     fn set_strategy(&mut self, strategy: Box<dyn SortStrategy>) {
[INFO] [stdout]    |        ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]   --> src/behavioral/iterator.rs:28:13
[INFO] [stdout]    |
[INFO] [stdout] 28 |     fn iter(&self) -> BookIterator {
[INFO] [stdout]    |             ^^^^^     ^^^^^^^^^^^^ the same lifetime is hidden here
[INFO] [stdout]    |             |
[INFO] [stdout]    |             the lifetime is elided here
[INFO] [stdout]    |
[INFO] [stdout]    = help: the same lifetime is referred to in inconsistent ways, making the signature confusing
[INFO] [stdout]    = note: `#[warn(mismatched_lifetime_syntaxes)]` on by default
[INFO] [stdout] help: use `'_` for type paths
[INFO] [stdout]    |
[INFO] [stdout] 28 |     fn iter(&self) -> BookIterator<'_> {
[INFO] [stdout]    |                                   ++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.48s
[INFO] running `Command { std: "docker" "inspect" "4c5ab1a5eb71737f47d0ad59eae6b3c8c32d360cf392710b7e1f341705e00927", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "4c5ab1a5eb71737f47d0ad59eae6b3c8c32d360cf392710b7e1f341705e00927", kill_on_drop: false }`
[INFO] [stdout] 4c5ab1a5eb71737f47d0ad59eae6b3c8c32d360cf392710b7e1f341705e00927
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+1f7f8ea0721a3b1eb73e6c6d25cccb371434b320" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] bef07db0f4050721e1b1c3cc1a27fb011e39dfd20dc69f2a034efc69a33f0477
[INFO] running `Command { std: "docker" "start" "-a" "bef07db0f4050721e1b1c3cc1a27fb011e39dfd20dc69f2a034efc69a33f0477", kill_on_drop: false }`
[INFO] [stderr] warning: fields `walls`, `doors`, `windows`, `roof`, and `garage` are never read
[INFO] [stderr]  --> src/creational/builder.rs:5:5
[INFO] [stderr]   |
[INFO] [stderr] 4 | pub struct House {
[INFO] [stderr]   |            ----- fields in this struct
[INFO] [stderr] 5 |     walls: String,
[INFO] [stderr]   |     ^^^^^
[INFO] [stderr] 6 |     doors: u32,
[INFO] [stderr]   |     ^^^^^
[INFO] [stderr] 7 |     windows: u32,
[INFO] [stderr]   |     ^^^^^^^
[INFO] [stderr] 8 |     roof: String,
[INFO] [stderr]   |     ^^^^
[INFO] [stderr] 9 |     garage: bool,
[INFO] [stderr]   |     ^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `House` has derived impls for the traits `Clone` and `Debug`, but these are intentionally ignored during dead code analysis
[INFO] [stderr]   = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stderr] 
[INFO] [stderr] warning: field `format` is never read
[INFO] [stderr]  --> src/creational/prototype.rs:7:5
[INFO] [stderr]   |
[INFO] [stderr] 4 | pub struct Document {
[INFO] [stderr]   |            -------- field in this struct
[INFO] [stderr] ...
[INFO] [stderr] 7 |     format: String,
[INFO] [stderr]   |     ^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `Document` has derived impls for the traits `Debug` and `Clone`, but these are intentionally ignored during dead code analysis
[INFO] [stderr] 
[INFO] [stderr] warning: field `texture` is never read
[INFO] [stderr]   --> src/structural/flyweight.rs:10:5
[INFO] [stderr]    |
[INFO] [stderr]  7 | struct TreeType {
[INFO] [stderr]    |        -------- field in this struct
[INFO] [stderr] ...
[INFO] [stderr] 10 |     texture: String,
[INFO] [stderr]    |     ^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `TreeType` has a derived impl for the trait `Clone`, but this is intentionally ignored during dead code analysis
[INFO] [stderr] 
[INFO] [stderr] warning: method `set_next` is never used
[INFO] [stderr]  --> src/behavioral/chain_of_responsibility.rs:4:8
[INFO] [stderr]   |
[INFO] [stderr] 3 | trait Handler {
[INFO] [stderr]   |       ------- method in this trait
[INFO] [stderr] 4 |     fn set_next(&mut self, handler: Box<dyn Handler>) -> &mut dyn Handler;
[INFO] [stderr]   |        ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct `BaseHandler` is never constructed
[INFO] [stderr]  --> src/behavioral/chain_of_responsibility.rs:8:8
[INFO] [stderr]   |
[INFO] [stderr] 8 | struct BaseHandler {
[INFO] [stderr]   |        ^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function `new` is never used
[INFO] [stderr]   --> src/behavioral/chain_of_responsibility.rs:13:8
[INFO] [stderr]    |
[INFO] [stderr] 12 | impl BaseHandler {
[INFO] [stderr]    | ---------------- associated function in this implementation
[INFO] [stderr] 13 |     fn new() -> Self {
[INFO] [stderr]    |        ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method `set_strategy` is never used
[INFO] [stderr]   --> src/behavioral/strategy.rs:42:8
[INFO] [stderr]    |
[INFO] [stderr] 37 | impl Sorter {
[INFO] [stderr]    | ----------- method in this implementation
[INFO] [stderr] ...
[INFO] [stderr] 42 |     fn set_strategy(&mut self, strategy: Box<dyn SortStrategy>) {
[INFO] [stderr]    |        ^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stderr]   --> src/behavioral/iterator.rs:28:13
[INFO] [stderr]    |
[INFO] [stderr] 28 |     fn iter(&self) -> BookIterator {
[INFO] [stderr]    |             ^^^^^     ^^^^^^^^^^^^ the same lifetime is hidden here
[INFO] [stderr]    |             |
[INFO] [stderr]    |             the lifetime is elided here
[INFO] [stderr]    |
[INFO] [stderr]    = help: the same lifetime is referred to in inconsistent ways, making the signature confusing
[INFO] [stderr]    = note: `#[warn(mismatched_lifetime_syntaxes)]` on by default
[INFO] [stderr] help: use `'_` for type paths
[INFO] [stderr]    |
[INFO] [stderr] 28 |     fn iter(&self) -> BookIterator<'_> {
[INFO] [stderr]    |                                   ++++
[INFO] [stderr] 
[INFO] [stderr] warning: `design_patterns_showcase` (bin "design_patterns_showcase" test) generated 8 warnings (run `cargo fix --bin "design_patterns_showcase" -p design_patterns_showcase --tests` to apply 1 suggestion)
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.05s
[INFO] [stderr]      Running unittests src/main.rs (/opt/rustwide/target/debug/deps/design_patterns_showcase-b50d8751e1fde28e)
[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" "bef07db0f4050721e1b1c3cc1a27fb011e39dfd20dc69f2a034efc69a33f0477", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "bef07db0f4050721e1b1c3cc1a27fb011e39dfd20dc69f2a034efc69a33f0477", kill_on_drop: false }`
[INFO] [stdout] bef07db0f4050721e1b1c3cc1a27fb011e39dfd20dc69f2a034efc69a33f0477
