[INFO] cloning repository https://github.com/MatteoPierro/domain_modeling_made_functional_rust
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/MatteoPierro/domain_modeling_made_functional_rust" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FMatteoPierro%2Fdomain_modeling_made_functional_rust", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FMatteoPierro%2Fdomain_modeling_made_functional_rust'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 7d82b118c3508912ea042f6923a26b173fb63270
[INFO] checking MatteoPierro/domain_modeling_made_functional_rust against try#2c4819a380dbddb1f2a0f4405a49fb6ed90983ae for pr-152996
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FMatteoPierro%2Fdomain_modeling_made_functional_rust" "/workspace/builds/worker-0-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-0-tc2/source'...
[INFO] [stderr] done.
[INFO] removed /workspace/builds/worker-0-tc2/source/rust-toolchain.toml
[INFO] started tweaking git repo https://github.com/MatteoPierro/domain_modeling_made_functional_rust
[INFO] finished tweaking git repo https://github.com/MatteoPierro/domain_modeling_made_functional_rust
[INFO] tweaked toml for git repo https://github.com/MatteoPierro/domain_modeling_made_functional_rust written to /workspace/builds/worker-0-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/MatteoPierro/domain_modeling_made_functional_rust on toolchain 2c4819a380dbddb1f2a0f4405a49fb6ed90983ae
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+2c4819a380dbddb1f2a0f4405a49fb6ed90983ae" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/MatteoPierro/domain_modeling_made_functional_rust 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" "+2c4819a380dbddb1f2a0f4405a49fb6ed90983ae" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr] warning: unused manifest key: package.channel
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[ERROR] error running command: no output for 300 seconds
[INFO] checking MatteoPierro/domain_modeling_made_functional_rust against try#2c4819a380dbddb1f2a0f4405a49fb6ed90983ae for pr-152996
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FMatteoPierro%2Fdomain_modeling_made_functional_rust" "/workspace/builds/worker-0-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-0-tc2/source'...
[INFO] [stderr] done.
[INFO] removed /workspace/builds/worker-0-tc2/source/rust-toolchain.toml
[INFO] started tweaking git repo https://github.com/MatteoPierro/domain_modeling_made_functional_rust
[INFO] finished tweaking git repo https://github.com/MatteoPierro/domain_modeling_made_functional_rust
[INFO] tweaked toml for git repo https://github.com/MatteoPierro/domain_modeling_made_functional_rust written to /workspace/builds/worker-0-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/MatteoPierro/domain_modeling_made_functional_rust on toolchain 2c4819a380dbddb1f2a0f4405a49fb6ed90983ae
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+2c4819a380dbddb1f2a0f4405a49fb6ed90983ae" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/MatteoPierro/domain_modeling_made_functional_rust 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" "+2c4819a380dbddb1f2a0f4405a49fb6ed90983ae" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr] warning: unused manifest key: package.channel
[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-0-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc2/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" "+2c4819a380dbddb1f2a0f4405a49fb6ed90983ae" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 485707d67354e4e84ef1d0d0823ca5901ac7fe4e4d054da6528dd792e84b3133
[INFO] running `Command { std: "docker" "start" "-a" "485707d67354e4e84ef1d0d0823ca5901ac7fe4e4d054da6528dd792e84b3133", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "485707d67354e4e84ef1d0d0823ca5901ac7fe4e4d054da6528dd792e84b3133", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "485707d67354e4e84ef1d0d0823ca5901ac7fe4e4d054da6528dd792e84b3133", kill_on_drop: false }`
[INFO] [stdout] 485707d67354e4e84ef1d0d0823ca5901ac7fe4e4d054da6528dd792e84b3133
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc2/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" "+2c4819a380dbddb1f2a0f4405a49fb6ed90983ae" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 79cf36ce08f4808ea0853538e85018eeb5e957fe44369b538e0beb173992c5e3
[INFO] running `Command { std: "docker" "start" "-a" "79cf36ce08f4808ea0853538e85018eeb5e957fe44369b538e0beb173992c5e3", kill_on_drop: false }`
[INFO] [stderr] warning: unused manifest key: package.channel
[INFO] [stderr]     Checking domain_modeling_made_functional_rust v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: type alias `Undefined` is never used
[INFO] [stdout]  --> src/bin/chapter5.rs:2:6
[INFO] [stdout]   |
[INFO] [stdout] 2 | type Undefined = !;
[INFO] [stdout]   |      ^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `CustomerInfo` is never constructed
[INFO] [stdout]  --> src/bin/chapter5.rs:4:8
[INFO] [stdout]   |
[INFO] [stdout] 4 | struct CustomerInfo(Undefined);
[INFO] [stdout]   |        ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `ShippingAddress` is never constructed
[INFO] [stdout]  --> src/bin/chapter5.rs:5:8
[INFO] [stdout]   |
[INFO] [stdout] 5 | struct ShippingAddress(Undefined);
[INFO] [stdout]   |        ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `BillingAddress` is never constructed
[INFO] [stdout]  --> src/bin/chapter5.rs:6:8
[INFO] [stdout]   |
[INFO] [stdout] 6 | struct BillingAddress(Undefined);
[INFO] [stdout]   |        ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `OrderLine` is never constructed
[INFO] [stdout]  --> src/bin/chapter5.rs:7:8
[INFO] [stdout]   |
[INFO] [stdout] 7 | struct OrderLine(Undefined);
[INFO] [stdout]   |        ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `BillingAmount` is never constructed
[INFO] [stdout]  --> src/bin/chapter5.rs:8:8
[INFO] [stdout]   |
[INFO] [stdout] 8 | struct BillingAmount(Undefined);
[INFO] [stdout]   |        ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Order` is never constructed
[INFO] [stdout]   --> src/bin/chapter5.rs:10:8
[INFO] [stdout]    |
[INFO] [stdout] 10 | struct Order {
[INFO] [stdout]    |        ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: type alias `Undefined` is never used
[INFO] [stdout]  --> src/bin/chapter5.rs:2:6
[INFO] [stdout]   |
[INFO] [stdout] 2 | type Undefined = !;
[INFO] [stdout]   |      ^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `CustomerInfo` is never constructed
[INFO] [stdout]  --> src/bin/chapter5.rs:4:8
[INFO] [stdout]   |
[INFO] [stdout] 4 | struct CustomerInfo(Undefined);
[INFO] [stdout]   |        ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `ShippingAddress` is never constructed
[INFO] [stdout]  --> src/bin/chapter5.rs:5:8
[INFO] [stdout]   |
[INFO] [stdout] 5 | struct ShippingAddress(Undefined);
[INFO] [stdout]   |        ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `BillingAddress` is never constructed
[INFO] [stdout]  --> src/bin/chapter5.rs:6:8
[INFO] [stdout]   |
[INFO] [stdout] 6 | struct BillingAddress(Undefined);
[INFO] [stdout]   |        ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `OrderLine` is never constructed
[INFO] [stdout]  --> src/bin/chapter5.rs:7:8
[INFO] [stdout]   |
[INFO] [stdout] 7 | struct OrderLine(Undefined);
[INFO] [stdout]   |        ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `BillingAmount` is never constructed
[INFO] [stdout]  --> src/bin/chapter5.rs:8:8
[INFO] [stdout]   |
[INFO] [stdout] 8 | struct BillingAmount(Undefined);
[INFO] [stdout]   |        ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Order` is never constructed
[INFO] [stdout]   --> src/bin/chapter5.rs:10:8
[INFO] [stdout]    |
[INFO] [stdout] 10 | struct Order {
[INFO] [stdout]    |        ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `unpaid_invoice`
[INFO] [stdout]    --> src/chapter4.rs:111:16
[INFO] [stdout]     |
[INFO] [stdout] 111 | fn pay_invoice(unpaid_invoice: UnpaidInvoice, payment: Payment) -> Result<PaidInvoice, PaymentError> {
[INFO] [stdout]     |                ^^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_unpaid_invoice`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `unpaid_invoice`
[INFO] [stdout]    --> src/chapter4.rs:111:16
[INFO] [stdout]     |
[INFO] [stdout] 111 | fn pay_invoice(unpaid_invoice: UnpaidInvoice, payment: Payment) -> Result<PaidInvoice, PaymentError> {
[INFO] [stdout]     |                ^^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_unpaid_invoice`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `payment`
[INFO] [stdout]    --> src/chapter4.rs:111:47
[INFO] [stdout]     |
[INFO] [stdout] 111 | fn pay_invoice(unpaid_invoice: UnpaidInvoice, payment: Payment) -> Result<PaidInvoice, PaymentError> {
[INFO] [stdout]     |                                               ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_payment`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `payment`
[INFO] [stdout]    --> src/chapter4.rs:111:47
[INFO] [stdout]     |
[INFO] [stdout] 111 | fn pay_invoice(unpaid_invoice: UnpaidInvoice, payment: Payment) -> Result<PaidInvoice, PaymentError> {
[INFO] [stdout]     |                                               ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_payment`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `pay_strategy`
[INFO] [stdout]    --> src/chapter4.rs:147:9
[INFO] [stdout]     |
[INFO] [stdout] 147 |     let pay_strategy: PayInvoice = pay_invoice;
[INFO] [stdout]     |         ^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_pay_strategy`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variants `GrannySmith` and `Fuji` are never constructed
[INFO] [stdout]  --> src/chapter4.rs:5:5
[INFO] [stdout]   |
[INFO] [stdout] 3 | enum AppleVariety {
[INFO] [stdout]   |      ------------ variants in this enum
[INFO] [stdout] 4 |     GoldenDelicious,
[INFO] [stdout] 5 |     GrannySmith,
[INFO] [stdout]   |     ^^^^^^^^^^^
[INFO] [stdout] 6 |     Fuji,
[INFO] [stdout]   |     ^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variants `Cavendish` and `GrosMichel` are never constructed
[INFO] [stdout]   --> src/chapter4.rs:10:5
[INFO] [stdout]    |
[INFO] [stdout]  9 | enum BananaVariety {
[INFO] [stdout]    |      ------------- variants in this enum
[INFO] [stdout] 10 |     Cavendish,
[INFO] [stdout]    |     ^^^^^^^^^
[INFO] [stdout] 11 |     GrosMichel,
[INFO] [stdout]    |     ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant `Bing` is never constructed
[INFO] [stdout]   --> src/chapter4.rs:17:5
[INFO] [stdout]    |
[INFO] [stdout] 15 | enum CherryVariety {
[INFO] [stdout]    |      ------------- variant in this enum
[INFO] [stdout] 16 |     Montmorency,
[INFO] [stdout] 17 |     Bing
[INFO] [stdout]    |     ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `pay_strategy`
[INFO] [stdout]    --> src/chapter4.rs:147:9
[INFO] [stdout]     |
[INFO] [stdout] 147 |     let pay_strategy: PayInvoice = pay_invoice;
[INFO] [stdout]     |         ^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_pay_strategy`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variants `GrannySmith` and `Fuji` are never constructed
[INFO] [stdout]  --> src/chapter4.rs:5:5
[INFO] [stdout]   |
[INFO] [stdout] 3 | enum AppleVariety {
[INFO] [stdout]   |      ------------ variants in this enum
[INFO] [stdout] 4 |     GoldenDelicious,
[INFO] [stdout] 5 |     GrannySmith,
[INFO] [stdout]   |     ^^^^^^^^^^^
[INFO] [stdout] 6 |     Fuji,
[INFO] [stdout]   |     ^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variants `Cavendish` and `GrosMichel` are never constructed
[INFO] [stdout]   --> src/chapter4.rs:10:5
[INFO] [stdout]    |
[INFO] [stdout]  9 | enum BananaVariety {
[INFO] [stdout]    |      ------------- variants in this enum
[INFO] [stdout] 10 |     Cavendish,
[INFO] [stdout]    |     ^^^^^^^^^
[INFO] [stdout] 11 |     GrosMichel,
[INFO] [stdout]    |     ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant `Bing` is never constructed
[INFO] [stdout]   --> src/chapter4.rs:17:5
[INFO] [stdout]    |
[INFO] [stdout] 15 | enum CherryVariety {
[INFO] [stdout]    |      ------------- variant in this enum
[INFO] [stdout] 16 |     Montmorency,
[INFO] [stdout] 17 |     Bing
[INFO] [stdout]    |     ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `apple`, `banana`, and `cherry` are never read
[INFO] [stdout]   --> src/chapter4.rs:21:5
[INFO] [stdout]    |
[INFO] [stdout] 20 | struct FruitSnack {
[INFO] [stdout]    |        ---------- fields in this struct
[INFO] [stdout] 21 |     apple: AppleVariety,
[INFO] [stdout]    |     ^^^^^
[INFO] [stdout] 22 |     banana: BananaVariety,
[INFO] [stdout]    |     ^^^^^^
[INFO] [stdout] 23 |     cherry: CherryVariety
[INFO] [stdout]    |     ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `0` is never read
[INFO] [stdout]   --> src/chapter4.rs:29:20
[INFO] [stdout]    |
[INFO] [stdout] 29 | struct ProductCode(String);
[INFO] [stdout]    |        ----------- ^^^^^^
[INFO] [stdout]    |        |
[INFO] [stdout]    |        field in this struct
[INFO] [stdout]    |
[INFO] [stdout]    = help: consider removing this field
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `apple`, `banana`, and `cherry` are never read
[INFO] [stdout]   --> src/chapter4.rs:21:5
[INFO] [stdout]    |
[INFO] [stdout] 20 | struct FruitSnack {
[INFO] [stdout]    |        ---------- fields in this struct
[INFO] [stdout] 21 |     apple: AppleVariety,
[INFO] [stdout]    |     ^^^^^
[INFO] [stdout] 22 |     banana: BananaVariety,
[INFO] [stdout]    |     ^^^^^^
[INFO] [stdout] 23 |     cherry: CherryVariety
[INFO] [stdout]    |     ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `0` is never read
[INFO] [stdout]   --> src/chapter4.rs:56:20
[INFO] [stdout]    |
[INFO] [stdout] 56 | struct CheckNumber(usize);
[INFO] [stdout]    |        ----------- ^^^^^
[INFO] [stdout]    |        |
[INFO] [stdout]    |        field in this struct
[INFO] [stdout]    |
[INFO] [stdout]    = help: consider removing this field
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `0` is never read
[INFO] [stdout]   --> src/chapter4.rs:57:19
[INFO] [stdout]    |
[INFO] [stdout] 57 | struct CardNumber(String);
[INFO] [stdout]    |        ---------- ^^^^^^
[INFO] [stdout]    |        |
[INFO] [stdout]    |        field in this struct
[INFO] [stdout]    |
[INFO] [stdout]    = help: consider removing this field
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `0` is never read
[INFO] [stdout]   --> src/chapter4.rs:29:20
[INFO] [stdout]    |
[INFO] [stdout] 29 | struct ProductCode(String);
[INFO] [stdout]    |        ----------- ^^^^^^
[INFO] [stdout]    |        |
[INFO] [stdout]    |        field in this struct
[INFO] [stdout]    |
[INFO] [stdout]    = help: consider removing this field
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variants `Visa` and `Mastercard` are never constructed
[INFO] [stdout]   --> src/chapter4.rs:60:5
[INFO] [stdout]    |
[INFO] [stdout] 59 | enum CardType {
[INFO] [stdout]    |      -------- variants in this enum
[INFO] [stdout] 60 |     Visa,
[INFO] [stdout]    |     ^^^^
[INFO] [stdout] 61 |     Mastercard
[INFO] [stdout]    |     ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `0` is never read
[INFO] [stdout]   --> src/chapter4.rs:56:20
[INFO] [stdout]    |
[INFO] [stdout] 56 | struct CheckNumber(usize);
[INFO] [stdout]    |        ----------- ^^^^^
[INFO] [stdout]    |        |
[INFO] [stdout]    |        field in this struct
[INFO] [stdout]    |
[INFO] [stdout]    = help: consider removing this field
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `0` is never read
[INFO] [stdout]   --> src/chapter4.rs:57:19
[INFO] [stdout]    |
[INFO] [stdout] 57 | struct CardNumber(String);
[INFO] [stdout]    |        ---------- ^^^^^^
[INFO] [stdout]    |        |
[INFO] [stdout]    |        field in this struct
[INFO] [stdout]    |
[INFO] [stdout]    = help: consider removing this field
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `card_type` and `card_number` are never read
[INFO] [stdout]   --> src/chapter4.rs:65:5
[INFO] [stdout]    |
[INFO] [stdout] 64 | struct CreditCardInfo {
[INFO] [stdout]    |        -------------- fields in this struct
[INFO] [stdout] 65 |     card_type: CardType,
[INFO] [stdout]    |     ^^^^^^^^^
[INFO] [stdout] 66 |     card_number: CardNumber
[INFO] [stdout]    |     ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variants `Visa` and `Mastercard` are never constructed
[INFO] [stdout]   --> src/chapter4.rs:60:5
[INFO] [stdout]    |
[INFO] [stdout] 59 | enum CardType {
[INFO] [stdout]    |      -------- variants in this enum
[INFO] [stdout] 60 |     Visa,
[INFO] [stdout]    |     ^^^^
[INFO] [stdout] 61 |     Mastercard
[INFO] [stdout]    |     ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variants `Cash`, `Check`, and `Card` are never constructed
[INFO] [stdout]   --> src/chapter4.rs:70:5
[INFO] [stdout]    |
[INFO] [stdout] 69 | enum PaymentMethod {
[INFO] [stdout]    |      ------------- variants in this enum
[INFO] [stdout] 70 |     Cash,
[INFO] [stdout]    |     ^^^^
[INFO] [stdout] 71 |     Check(CheckNumber),
[INFO] [stdout]    |     ^^^^^
[INFO] [stdout] 72 |     Card(CreditCardInfo)
[INFO] [stdout]    |     ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `card_type` and `card_number` are never read
[INFO] [stdout]   --> src/chapter4.rs:65:5
[INFO] [stdout]    |
[INFO] [stdout] 64 | struct CreditCardInfo {
[INFO] [stdout]    |        -------------- fields in this struct
[INFO] [stdout] 65 |     card_type: CardType,
[INFO] [stdout]    |     ^^^^^^^^^
[INFO] [stdout] 66 |     card_number: CardNumber
[INFO] [stdout]    |     ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variants `Cash`, `Check`, and `Card` are never constructed
[INFO] [stdout]   --> src/chapter4.rs:70:5
[INFO] [stdout]    |
[INFO] [stdout] 69 | enum PaymentMethod {
[INFO] [stdout]    |      ------------- variants in this enum
[INFO] [stdout] 70 |     Cash,
[INFO] [stdout]    |     ^^^^
[INFO] [stdout] 71 |     Check(CheckNumber),
[INFO] [stdout]    |     ^^^^^
[INFO] [stdout] 72 |     Card(CreditCardInfo)
[INFO] [stdout]    |     ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `0` is never read
[INFO] [stdout]   --> src/chapter4.rs:75:22
[INFO] [stdout]    |
[INFO] [stdout] 75 | struct PaymentAmount(f64);
[INFO] [stdout]    |        ------------- ^^^
[INFO] [stdout]    |        |
[INFO] [stdout]    |        field in this struct
[INFO] [stdout]    |
[INFO] [stdout]    = help: consider removing this field
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variants `EUR` and `USD` are never constructed
[INFO] [stdout]   --> src/chapter4.rs:78:5
[INFO] [stdout]    |
[INFO] [stdout] 77 | enum Currency {
[INFO] [stdout]    |      -------- variants in this enum
[INFO] [stdout] 78 |     EUR,
[INFO] [stdout]    |     ^^^
[INFO] [stdout] 79 |     USD
[INFO] [stdout]    |     ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `amount`, `currency`, and `method` are never read
[INFO] [stdout]   --> src/chapter4.rs:83:5
[INFO] [stdout]    |
[INFO] [stdout] 82 | struct Payment {
[INFO] [stdout]    |        ------- fields in this struct
[INFO] [stdout] 83 |     amount: PaymentAmount,
[INFO] [stdout]    |     ^^^^^^
[INFO] [stdout] 84 |     currency: Currency,
[INFO] [stdout]    |     ^^^^^^^^
[INFO] [stdout] 85 |     method: PaymentMethod
[INFO] [stdout]    |     ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: type alias `ConvertPaymentCurrency` is never used
[INFO] [stdout]   --> src/chapter4.rs:91:6
[INFO] [stdout]    |
[INFO] [stdout] 91 | type ConvertPaymentCurrency = fn(Payment, Currency) -> Payment;
[INFO] [stdout]    |      ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `PersonalName` is never constructed
[INFO] [stdout]   --> src/chapter4.rs:95:8
[INFO] [stdout]    |
[INFO] [stdout] 95 | struct PersonalName {
[INFO] [stdout]    |        ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variants `CardTypeNotRecognized`, `PaymentRejected`, and `PaymentProviderOffline` are never constructed
[INFO] [stdout]    --> src/chapter4.rs:104:5
[INFO] [stdout]     |
[INFO] [stdout] 103 | enum PaymentError {
[INFO] [stdout]     |      ------------ variants in this enum
[INFO] [stdout] 104 |     CardTypeNotRecognized,
[INFO] [stdout]     |     ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 105 |     PaymentRejected,
[INFO] [stdout]     |     ^^^^^^^^^^^^^^^
[INFO] [stdout] 106 |     PaymentProviderOffline
[INFO] [stdout]     |     ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Customer` is never constructed
[INFO] [stdout]    --> src/chapter4.rs:117:8
[INFO] [stdout]     |
[INFO] [stdout] 117 | struct Customer;
[INFO] [stdout]     |        ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: type alias `SaveCustomer` is never used
[INFO] [stdout]    --> src/chapter4.rs:118:6
[INFO] [stdout]     |
[INFO] [stdout] 118 | type SaveCustomer = fn(Customer);
[INFO] [stdout]     |      ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: type alias `NextRandom` is never used
[INFO] [stdout]    --> src/chapter4.rs:120:6
[INFO] [stdout]     |
[INFO] [stdout] 120 | type NextRandom = fn() -> usize;
[INFO] [stdout]     |      ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `0` is never read
[INFO] [stdout]   --> src/chapter4.rs:75:22
[INFO] [stdout]    |
[INFO] [stdout] 75 | struct PaymentAmount(f64);
[INFO] [stdout]    |        ------------- ^^^
[INFO] [stdout]    |        |
[INFO] [stdout]    |        field in this struct
[INFO] [stdout]    |
[INFO] [stdout]    = help: consider removing this field
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variants `EUR` and `USD` are never constructed
[INFO] [stdout]   --> src/chapter4.rs:78:5
[INFO] [stdout]    |
[INFO] [stdout] 77 | enum Currency {
[INFO] [stdout]    |      -------- variants in this enum
[INFO] [stdout] 78 |     EUR,
[INFO] [stdout]    |     ^^^
[INFO] [stdout] 79 |     USD
[INFO] [stdout]    |     ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `amount`, `currency`, and `method` are never read
[INFO] [stdout]   --> src/chapter4.rs:83:5
[INFO] [stdout]    |
[INFO] [stdout] 82 | struct Payment {
[INFO] [stdout]    |        ------- fields in this struct
[INFO] [stdout] 83 |     amount: PaymentAmount,
[INFO] [stdout]    |     ^^^^^^
[INFO] [stdout] 84 |     currency: Currency,
[INFO] [stdout]    |     ^^^^^^^^
[INFO] [stdout] 85 |     method: PaymentMethod
[INFO] [stdout]    |     ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: type alias `ConvertPaymentCurrency` is never used
[INFO] [stdout]   --> src/chapter4.rs:91:6
[INFO] [stdout]    |
[INFO] [stdout] 91 | type ConvertPaymentCurrency = fn(Payment, Currency) -> Payment;
[INFO] [stdout]    |      ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `PersonalName` is never constructed
[INFO] [stdout]   --> src/chapter4.rs:95:8
[INFO] [stdout]    |
[INFO] [stdout] 95 | struct PersonalName {
[INFO] [stdout]    |        ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variants `CardTypeNotRecognized`, `PaymentRejected`, and `PaymentProviderOffline` are never constructed
[INFO] [stdout]    --> src/chapter4.rs:104:5
[INFO] [stdout]     |
[INFO] [stdout] 103 | enum PaymentError {
[INFO] [stdout]     |      ------------ variants in this enum
[INFO] [stdout] 104 |     CardTypeNotRecognized,
[INFO] [stdout]     |     ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 105 |     PaymentRejected,
[INFO] [stdout]     |     ^^^^^^^^^^^^^^^
[INFO] [stdout] 106 |     PaymentProviderOffline
[INFO] [stdout]     |     ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Customer` is never constructed
[INFO] [stdout]    --> src/chapter4.rs:117:8
[INFO] [stdout]     |
[INFO] [stdout] 117 | struct Customer;
[INFO] [stdout]     |        ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: type alias `SaveCustomer` is never used
[INFO] [stdout]    --> src/chapter4.rs:118:6
[INFO] [stdout]     |
[INFO] [stdout] 118 | type SaveCustomer = fn(Customer);
[INFO] [stdout]     |      ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: type alias `NextRandom` is never used
[INFO] [stdout]    --> src/chapter4.rs:120:6
[INFO] [stdout]     |
[INFO] [stdout] 120 | type NextRandom = fn() -> usize;
[INFO] [stdout]     |      ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.06s
[INFO] running `Command { std: "docker" "inspect" "79cf36ce08f4808ea0853538e85018eeb5e957fe44369b538e0beb173992c5e3", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "79cf36ce08f4808ea0853538e85018eeb5e957fe44369b538e0beb173992c5e3", kill_on_drop: false }`
[INFO] [stdout] 79cf36ce08f4808ea0853538e85018eeb5e957fe44369b538e0beb173992c5e3