[INFO] cloning repository https://github.com/11MK/100-exercises-rust
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/11MK/100-exercises-rust" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2F11MK%2F100-exercises-rust", kill_on_drop: false }`
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[INFO] [stdout] 9e7da6766b4d1615f764cae237f14bfa65c86c44
[INFO] checking 11MK/100-exercises-rust against try#44f3504e96c944ae54fc72b5f5008f53f7eda001 for pr-136776
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2F11MK%2F100-exercises-rust" "/workspace/builds/worker-6-tc2/source", kill_on_drop: false }`
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[INFO] validating manifest of git repo https://github.com/11MK/100-exercises-rust on toolchain 44f3504e96c944ae54fc72b5f5008f53f7eda001
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+44f3504e96c944ae54fc72b5f5008f53f7eda001" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/11MK/100-exercises-rust
[INFO] finished tweaking git repo https://github.com/11MK/100-exercises-rust
[INFO] tweaked toml for git repo https://github.com/11MK/100-exercises-rust written to /workspace/builds/worker-6-tc2/source/Cargo.toml
[INFO] crate git repo https://github.com/11MK/100-exercises-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" "+44f3504e96c944ae54fc72b5f5008f53f7eda001" "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-6-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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@sha256:3959728d45483eb673ba100a951a6b9f5012970368db2a9e08e0ac9b67c8a5ad" "/opt/rustwide/cargo-home/bin/cargo" "+44f3504e96c944ae54fc72b5f5008f53f7eda001" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
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[INFO] [stdout] e54389ff26e485899fcfdf787e25df1890d6a3113fd2d52bc9a79cca96edb536
[INFO] running `Command { std: "docker" "start" "-a" "e54389ff26e485899fcfdf787e25df1890d6a3113fd2d52bc9a79cca96edb536", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.82
[INFO] [stderr]    Compiling unicode-ident v1.0.12
[INFO] [stderr]     Checking common v0.1.0 (/opt/rustwide/workdir/helpers/common)
[INFO] [stderr]    Compiling thiserror v1.0.60
[INFO] [stderr]    Compiling libc v0.2.154
[INFO] [stderr]    Compiling autocfg v1.3.0
[INFO] [stderr]     Checking bytes v1.6.0
[INFO] [stderr]     Checking pin-project-lite v0.2.14
[INFO] [stderr]    Compiling anyhow v1.0.83
[INFO] [stderr]     Checking static_assertions v1.1.0
[INFO] [stderr]     Checking outro_02 v0.1.0 (/opt/rustwide/workdir/exercises/03_ticket_v1/12_outro)
[INFO] [stderr]     Checking outro_03 v0.1.0 (/opt/rustwide/workdir/exercises/04_traits/13_outro)
[INFO] [stderr]     Checking variants_with_data v0.1.0 (/opt/rustwide/workdir/exercises/05_ticket_v2/03_variants_with_data)
[INFO] [stderr]     Checking mut_slice v0.1.0 (/opt/rustwide/workdir/exercises/06_ticket_management/11_mutable_slices)
[INFO] [stderr]     Checking leaking v0.1.0 (/opt/rustwide/workdir/exercises/07_threads/03_leak)
[INFO] [stderr]     Checking match_ v0.1.0 (/opt/rustwide/workdir/exercises/05_ticket_v2/02_match)
[INFO] [stdout] warning: struct `Ticket` is never constructed
[INFO] [stdout]  --> exercises/05_ticket_v2/03_variants_with_data/src/lib.rs:6:8
[INFO] [stdout]   |
[INFO] [stdout] 6 | struct Ticket {
[INFO] [stdout]   |        ^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum `Status` is never used
[INFO] [stdout]   --> exercises/05_ticket_v2/03_variants_with_data/src/lib.rs:13:6
[INFO] [stdout]    |
[INFO] [stdout] 13 | enum Status {
[INFO] [stdout]    |      ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated items `new` and `assigned_to` are never used
[INFO] [stdout]   --> exercises/05_ticket_v2/03_variants_with_data/src/lib.rs:20:12
[INFO] [stdout]    |
[INFO] [stdout] 19 | impl Ticket {
[INFO] [stdout]    | ----------- associated items in this implementation
[INFO] [stdout] 20 |     pub fn new(title: String, description: String, status: Status) -> Ticket {
[INFO] [stdout]    |            ^^^
[INFO] [stdout] ...
[INFO] [stdout] 40 |     pub fn assigned_to(&self) -> &str {
[INFO] [stdout]    |            ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::thread`
[INFO] [stdout]  --> exercises/07_threads/03_leak/src/lib.rs:6:5
[INFO] [stdout]   |
[INFO] [stdout] 6 | use std::thread;
[INFO] [stdout]   |     ^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum `Shape` is never used
[INFO] [stdout]  --> exercises/05_ticket_v2/02_match/src/lib.rs:1:6
[INFO] [stdout]   |
[INFO] [stdout] 1 | enum Shape {
[INFO] [stdout]   |      ^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Checking references_in_memory v0.1.0 (/opt/rustwide/workdir/exercises/03_ticket_v1/10_references_in_memory)
[INFO] [stdout] warning: method `n_sides` is never used
[INFO] [stdout]   --> exercises/05_ticket_v2/02_match/src/lib.rs:11:12
[INFO] [stdout]    |
[INFO] [stdout] 9  | impl Shape {
[INFO] [stdout]    | ---------- method in this implementation
[INFO] [stdout] 10 |     // TODO: Implement the `n_sides` method using a `match`.
[INFO] [stdout] 11 |     pub fn n_sides(&self) -> u8 {
[INFO] [stdout]    |            ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Checking from v0.1.0 (/opt/rustwide/workdir/exercises/04_traits/08_from)
[INFO] [stderr]     Checking visibility v0.1.0 (/opt/rustwide/workdir/exercises/03_ticket_v1/04_visibility)
[INFO] [stderr]     Checking fallibility v0.1.0 (/opt/rustwide/workdir/exercises/05_ticket_v2/06_fallibility)
[INFO] [stdout] warning: unused variable: `v`
[INFO] [stdout]  --> exercises/07_threads/03_leak/src/lib.rs:8:12
[INFO] [stdout]   |
[INFO] [stdout] 8 | pub fn sum(v: Vec<i32>) -> i32 {
[INFO] [stdout]   |            ^ help: if this is intentional, prefix it with an underscore: `_v`
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Checking thiserror_ v0.1.0 (/opt/rustwide/workdir/exercises/05_ticket_v2/12_thiserror)
[INFO] [stderr]     Checking error_trait v0.1.0 (/opt/rustwide/workdir/exercises/05_ticket_v2/09_error_trait)
[INFO] [stderr]     Checking validation v0.1.0 (/opt/rustwide/workdir/exercises/03_ticket_v1/02_validation)
[INFO] [stdout] warning: unreachable expression
[INFO] [stdout]   --> exercises/03_ticket_v1/10_references_in_memory/src/lib.rs:16:9
[INFO] [stdout]    |
[INFO] [stdout] 16 |         assert_eq!(size_of::<&u16>(), todo!());
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^-------^
[INFO] [stdout]    |         |                             |
[INFO] [stdout]    |         |                             any code following this expression is unreachable
[INFO] [stdout]    |         unreachable expression
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unreachable_code)]` on by default
[INFO] [stdout]    = note: this warning originates in the macro `assert_eq` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unreachable expression
[INFO] [stdout]   --> exercises/03_ticket_v1/10_references_in_memory/src/lib.rs:16:9
[INFO] [stdout]    |
[INFO] [stdout] 16 |         assert_eq!(size_of::<&u16>(), todo!());
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |         |
[INFO] [stdout]    |         unreachable expression
[INFO] [stdout]    |         any code following this expression is unreachable
[INFO] [stdout]    |
[INFO] [stdout]    = note: this warning originates in the macro `assert_eq` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unreachable expression
[INFO] [stdout]   --> exercises/03_ticket_v1/10_references_in_memory/src/lib.rs:21:9
[INFO] [stdout]    |
[INFO] [stdout] 21 |         assert_eq!(size_of::<&u64>(), todo!());
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^-------^
[INFO] [stdout]    |         |                             |
[INFO] [stdout]    |         |                             any code following this expression is unreachable
[INFO] [stdout]    |         unreachable expression
[INFO] [stdout]    |
[INFO] [stdout]    = note: this warning originates in the macro `assert_eq` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unreachable expression
[INFO] [stdout]   --> exercises/03_ticket_v1/10_references_in_memory/src/lib.rs:21:9
[INFO] [stdout]    |
[INFO] [stdout] 21 |         assert_eq!(size_of::<&u64>(), todo!());
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |         |
[INFO] [stdout]    |         unreachable expression
[INFO] [stdout]    |         any code following this expression is unreachable
[INFO] [stdout]    |
[INFO] [stdout]    = note: this warning originates in the macro `assert_eq` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unreachable expression
[INFO] [stdout]   --> exercises/03_ticket_v1/10_references_in_memory/src/lib.rs:26:9
[INFO] [stdout]    |
[INFO] [stdout] 26 |         assert_eq!(size_of::<&Ticket>(), todo!());
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^-------^
[INFO] [stdout]    |         |                                |
[INFO] [stdout]    |         |                                any code following this expression is unreachable
[INFO] [stdout]    |         unreachable expression
[INFO] [stdout]    |
[INFO] [stdout]    = note: this warning originates in the macro `assert_eq` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unreachable expression
[INFO] [stdout]   --> exercises/03_ticket_v1/10_references_in_memory/src/lib.rs:26:9
[INFO] [stdout]    |
[INFO] [stdout] 26 |         assert_eq!(size_of::<&Ticket>(), todo!());
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |         |
[INFO] [stdout]    |         unreachable expression
[INFO] [stdout]    |         any code following this expression is unreachable
[INFO] [stdout]    |
[INFO] [stdout]    = note: this warning originates in the macro `assert_eq` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0603]: struct `Ticket` is private
[INFO] [stdout]   --> exercises/03_ticket_v1/04_visibility/src/lib.rs:41:24
[INFO] [stdout]    |
[INFO] [stdout] 41 |     use super::ticket::Ticket;
[INFO] [stdout]    |                        ^^^^^^ private struct
[INFO] [stdout]    |
[INFO] [stdout] note: the struct `Ticket` is defined here
[INFO] [stdout]   --> exercises/03_ticket_v1/04_visibility/src/lib.rs:2:5
[INFO] [stdout]    |
[INFO] [stdout] 2  |     struct Ticket {
[INFO] [stdout]    |     ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0277]: the trait bound `TicketNewError: AmbiguousIfMoreThanOne<Token>` is not satisfied
[INFO] [stdout]    --> exercises/05_ticket_v2/09_error_trait/src/lib.rs:104:22
[INFO] [stdout]     |
[INFO] [stdout] 104 |     assert_impl_one!(TicketNewError: std::error::Error);
[INFO] [stdout]     |                      ^^^^^^^^^^^^^^ the trait `std::error::Error` is not implemented for `TicketNewError`
[INFO] [stdout]     |
[INFO] [stdout] note: required for `TicketNewError` to implement `AmbiguousIfMoreThanOne<Token>`
[INFO] [stdout]    --> exercises/05_ticket_v2/09_error_trait/src/lib.rs:104:5
[INFO] [stdout]     |
[INFO] [stdout] 104 |     assert_impl_one!(TicketNewError: std::error::Error);
[INFO] [stdout]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ unsatisfied trait bound introduced here
[INFO] [stdout]     = note: this error originates in the macro `assert_impl_one` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0603`.
[INFO] [stdout] 
[INFO] [stdout] warning: fields `title`, `description`, and `status` are never read
[INFO] [stdout]  --> exercises/03_ticket_v1/10_references_in_memory/src/lib.rs:2:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | pub struct Ticket {
[INFO] [stdout]   |            ------ fields in this struct
[INFO] [stdout] 2 |     title: String,
[INFO] [stdout]   |     ^^^^^
[INFO] [stdout] 3 |     description: String,
[INFO] [stdout]   |     ^^^^^^^^^^^
[INFO] [stdout] 4 |     status: String,
[INFO] [stdout]   |     ^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0432]: unresolved import `outro_03::SaturatingU16`
[INFO] [stdout]  --> exercises/04_traits/13_outro/tests/integration.rs:1:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use outro_03::SaturatingU16;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^^ no `SaturatingU16` in the root
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0277]: the trait bound `WrappingU32: From<{integer}>` is not satisfied
[INFO] [stdout]  --> exercises/04_traits/08_from/src/lib.rs:8:36
[INFO] [stdout]   |
[INFO] [stdout] 8 |     let wrapping: WrappingU32 = 42.into();
[INFO] [stdout]   |                                    ^^^^ the trait `From<{integer}>` is not implemented for `WrappingU32`
[INFO] [stdout]   |
[INFO] [stdout]   = note: required for `{integer}` to implement `Into<WrappingU32>`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `visibility` (lib test) due to 1 previous error
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stdout] error[E0277]: `TicketNewError` doesn't implement `std::fmt::Display`
[INFO] [stdout]    --> exercises/05_ticket_v2/09_error_trait/src/lib.rs:101:34
[INFO] [stdout]     |
[INFO] [stdout] 101 |         assert_eq!(format!("{}", ticket.unwrap_err()), "Title cannot be empty");
[INFO] [stdout]     |                                  ^^^^^^^^^^^^^^^^^^^ `TicketNewError` cannot be formatted with the default formatter
[INFO] [stdout]     |
[INFO] [stdout]     = help: the trait `std::fmt::Display` is not implemented for `TicketNewError`
[INFO] [stdout]     = note: in format strings you may be able to use `{:?}` (or {:#?} for pretty-print) instead
[INFO] [stdout]     = note: this error originates in the macro `$crate::__export::format_args` which comes from the expansion of the macro `format` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0432`.
[INFO] [stdout] 
[INFO] [stdout] error[E0432]: unresolved import `outro_02::Order`
[INFO] [stdout]  --> exercises/03_ticket_v1/12_outro/tests/integration.rs:1:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use outro_02::Order;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^ no `Order` in the root
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `title`
[INFO] [stdout]   --> exercises/05_ticket_v2/09_error_trait/src/lib.rs:15:16
[INFO] [stdout]    |
[INFO] [stdout] 15 | fn easy_ticket(title: String, description: String, status: Status) -> Ticket {
[INFO] [stdout]    |                ^^^^^ help: if this is intentional, prefix it with an underscore: `_title`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `description`
[INFO] [stdout]   --> exercises/05_ticket_v2/09_error_trait/src/lib.rs:15:31
[INFO] [stdout]    |
[INFO] [stdout] 15 | fn easy_ticket(title: String, description: String, status: Status) -> Ticket {
[INFO] [stdout]    |                               ^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_description`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `status`
[INFO] [stdout]   --> exercises/05_ticket_v2/09_error_trait/src/lib.rs:15:52
[INFO] [stdout]    |
[INFO] [stdout] 15 | fn easy_ticket(title: String, description: String, status: Status) -> Ticket {
[INFO] [stdout]    |                                                    ^^^^^^ help: if this is intentional, prefix it with an underscore: `_status`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0308]: mismatched types
[INFO] [stdout]  --> exercises/04_traits/08_from/src/lib.rs:9:38
[INFO] [stdout]   |
[INFO] [stdout] 9 |     let wrapping = WrappingU32::from(42);
[INFO] [stdout]   |                    ----------------- ^^ expected `WrappingU32`, found integer
[INFO] [stdout]   |                    |
[INFO] [stdout]   |                    arguments to this function are incorrect
[INFO] [stdout]   |
[INFO] [stdout] note: associated function defined here
[INFO] [stdout]  --> /rustc/44f3504e96c944ae54fc72b5f5008f53f7eda001/library/core/src/convert/mod.rs:587:8
[INFO] [stdout] help: try wrapping the expression in `WrappingU32`
[INFO] [stdout]   |
[INFO] [stdout] 9 |     let wrapping = WrappingU32::from(WrappingU32 { value: 42 });
[INFO] [stdout]   |                                      ++++++++++++++++++++    +
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] Some errors have detailed explanations: E0277, E0308.
[INFO] [stdout] 
[INFO] [stdout] For more information about an error, try `rustc --explain E0277`.
[INFO] [stdout] 
[INFO] [stdout] warning: unreachable expression
[INFO] [stdout]   --> exercises/03_ticket_v1/02_validation/src/lib.rs:21:9
[INFO] [stdout]    |
[INFO] [stdout] 20 |           todo!();
[INFO] [stdout]    |           ------- any code following this expression is unreachable
[INFO] [stdout] 21 | /         Self {
[INFO] [stdout] 22 | |             title,
[INFO] [stdout] 23 | |             description,
[INFO] [stdout] 24 | |             status,
[INFO] [stdout] 25 | |         }
[INFO] [stdout]    | |_________^ unreachable expression
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unreachable_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `outro_03` (test "integration") due to 1 previous error
[INFO] [stdout] For more information about this error, try `rustc --explain E0277`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `from` (lib) due to 2 previous errors
[INFO] [stdout] For more information about this error, try `rustc --explain E0432`.
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `title`
[INFO] [stdout]   --> exercises/03_ticket_v1/02_validation/src/lib.rs:19:12
[INFO] [stdout]    |
[INFO] [stdout] 19 |     fn new(title: String, description: String, status: String) -> Self {
[INFO] [stdout]    |            ^^^^^ help: if this is intentional, prefix it with an underscore: `_title`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `description`
[INFO] [stdout]   --> exercises/03_ticket_v1/02_validation/src/lib.rs:19:27
[INFO] [stdout]    |
[INFO] [stdout] 19 |     fn new(title: String, description: String, status: String) -> Self {
[INFO] [stdout]    |                           ^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_description`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `status`
[INFO] [stdout]   --> exercises/03_ticket_v1/02_validation/src/lib.rs:19:48
[INFO] [stdout]    |
[INFO] [stdout] 19 |     fn new(title: String, description: String, status: String) -> Self {
[INFO] [stdout]    |                                                ^^^^^^ help: if this is intentional, prefix it with an underscore: `_status`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `title`, `description`, and `status` are never read
[INFO] [stdout]  --> exercises/03_ticket_v1/02_validation/src/lib.rs:2:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | struct Ticket {
[INFO] [stdout]   |        ------ fields in this struct
[INFO] [stdout] 2 |     title: String,
[INFO] [stdout]   |     ^^^^^
[INFO] [stdout] 3 |     description: String,
[INFO] [stdout]   |     ^^^^^^^^^^^
[INFO] [stdout] 4 |     status: String,
[INFO] [stdout]   |     ^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0599]: no method named `unwrap_err` found for struct `Ticket` in the current scope
[INFO] [stdout]   --> exercises/05_ticket_v2/06_fallibility/src/lib.rs:48:79
[INFO] [stdout]    |
[INFO] [stdout] 5  | struct Ticket {
[INFO] [stdout]    | ------------- method `unwrap_err` not found for this struct
[INFO] [stdout] ...
[INFO] [stdout] 48 |         let error = Ticket::new("".into(), valid_description(), Status::ToDo).unwrap_err();
[INFO] [stdout]    |                                                                               ^^^^^^^^^^ method not found in `Ticket`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `outro_02` (test "integration") due to 1 previous error
[INFO] [stdout] error[E0599]: no method named `unwrap_err` found for struct `Ticket` in the current scope
[INFO] [stdout]   --> exercises/05_ticket_v2/06_fallibility/src/lib.rs:54:73
[INFO] [stdout]    |
[INFO] [stdout] 5  | struct Ticket {
[INFO] [stdout]    | ------------- method `unwrap_err` not found for this struct
[INFO] [stdout] ...
[INFO] [stdout] 54 |         let error = Ticket::new(valid_title(), "".into(), Status::ToDo).unwrap_err();
[INFO] [stdout]    |                                                                         ^^^^^^^^^^ method not found in `Ticket`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0599]: no method named `unwrap_err` found for struct `Ticket` in the current scope
[INFO] [stdout]   --> exercises/05_ticket_v2/06_fallibility/src/lib.rs:61:81
[INFO] [stdout]    |
[INFO] [stdout] 5  | struct Ticket {
[INFO] [stdout]    | ------------- method `unwrap_err` not found for this struct
[INFO] [stdout] ...
[INFO] [stdout] 61 |             Ticket::new(overly_long_title(), valid_description(), Status::ToDo).unwrap_err();
[INFO] [stdout]    |                                                                                 ^^^^^^^^^^ method not found in `Ticket`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `error_trait` (lib test) due to 2 previous errors; 3 warnings emitted
[INFO] [stdout] error[E0599]: no method named `unwrap_err` found for struct `Ticket` in the current scope
[INFO] [stdout]   --> exercises/05_ticket_v2/06_fallibility/src/lib.rs:68:81
[INFO] [stdout]    |
[INFO] [stdout] 5  | struct Ticket {
[INFO] [stdout]    | ------------- method `unwrap_err` not found for this struct
[INFO] [stdout] ...
[INFO] [stdout] 68 |             Ticket::new(valid_title(), overly_long_description(), Status::ToDo).unwrap_err();
[INFO] [stdout]    |                                                                                 ^^^^^^^^^^ method not found in `Ticket`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0599]: `TicketNewError` doesn't implement `std::fmt::Display`
[INFO] [stdout]   --> exercises/05_ticket_v2/12_thiserror/src/lib.rs:62:24
[INFO] [stdout]    |
[INFO] [stdout] 6  | enum TicketNewError {
[INFO] [stdout]    | ------------------- method `to_string` not found for this enum because it doesn't satisfy `TicketNewError: ToString` or `TicketNewError: std::fmt::Display`
[INFO] [stdout] ...
[INFO] [stdout] 62 |         assert_eq!(err.to_string(), "Title cannot be empty");
[INFO] [stdout]    |                        ^^^^^^^^^ `TicketNewError` cannot be formatted with the default formatter
[INFO] [stdout]    |
[INFO] [stdout]    = note: the following trait bounds were not satisfied:
[INFO] [stdout]            `TicketNewError: std::fmt::Display`
[INFO] [stdout]            which is required by `TicketNewError: ToString`
[INFO] [stdout]    = note: in format strings you may be able to use `{:?}` (or {:#?} for pretty-print) instead
[INFO] [stdout] note: the trait `std::fmt::Display` must be implemented
[INFO] [stdout]   --> /rustc/44f3504e96c944ae54fc72b5f5008f53f7eda001/library/core/src/fmt/mod.rs:987:1
[INFO] [stdout]    = help: items from traits can only be used if the trait is implemented and in scope
[INFO] [stdout]    = note: the following trait defines an item `to_string`, perhaps you need to implement it:
[INFO] [stdout]            candidate #1: `ToString`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0599`.
[INFO] [stdout] 
[INFO] [stdout] error[E0599]: `TicketNewError` doesn't implement `std::fmt::Display`
[INFO] [stdout]   --> exercises/05_ticket_v2/12_thiserror/src/lib.rs:68:24
[INFO] [stdout]    |
[INFO] [stdout] 6  | enum TicketNewError {
[INFO] [stdout]    | ------------------- method `to_string` not found for this enum because it doesn't satisfy `TicketNewError: ToString` or `TicketNewError: std::fmt::Display`
[INFO] [stdout] ...
[INFO] [stdout] 68 |         assert_eq!(err.to_string(), "Description cannot be empty");
[INFO] [stdout]    |                        ^^^^^^^^^ `TicketNewError` cannot be formatted with the default formatter
[INFO] [stdout]    |
[INFO] [stdout]    = note: the following trait bounds were not satisfied:
[INFO] [stdout]            `TicketNewError: std::fmt::Display`
[INFO] [stdout]            which is required by `TicketNewError: ToString`
[INFO] [stdout]    = note: in format strings you may be able to use `{:?}` (or {:#?} for pretty-print) instead
[INFO] [stdout] note: the trait `std::fmt::Display` must be implemented
[INFO] [stdout]   --> /rustc/44f3504e96c944ae54fc72b5f5008f53f7eda001/library/core/src/fmt/mod.rs:987:1
[INFO] [stdout]    = help: items from traits can only be used if the trait is implemented and in scope
[INFO] [stdout]    = note: the following trait defines an item `to_string`, perhaps you need to implement it:
[INFO] [stdout]            candidate #1: `ToString`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `fallibility` (lib test) due to 4 previous errors
[INFO] [stdout] error[E0599]: `TicketNewError` doesn't implement `std::fmt::Display`
[INFO] [stdout]   --> exercises/05_ticket_v2/12_thiserror/src/lib.rs:74:24
[INFO] [stdout]    |
[INFO] [stdout] 6  | enum TicketNewError {
[INFO] [stdout]    | ------------------- method `to_string` not found for this enum because it doesn't satisfy `TicketNewError: ToString` or `TicketNewError: std::fmt::Display`
[INFO] [stdout] ...
[INFO] [stdout] 74 |         assert_eq!(err.to_string(), "Title cannot be longer than 50 characters");
[INFO] [stdout]    |                        ^^^^^^^^^ `TicketNewError` cannot be formatted with the default formatter
[INFO] [stdout]    |
[INFO] [stdout]    = note: the following trait bounds were not satisfied:
[INFO] [stdout]            `TicketNewError: std::fmt::Display`
[INFO] [stdout]            which is required by `TicketNewError: ToString`
[INFO] [stdout]    = note: in format strings you may be able to use `{:?}` (or {:#?} for pretty-print) instead
[INFO] [stdout] note: the trait `std::fmt::Display` must be implemented
[INFO] [stdout]   --> /rustc/44f3504e96c944ae54fc72b5f5008f53f7eda001/library/core/src/fmt/mod.rs:987:1
[INFO] [stdout]    = help: items from traits can only be used if the trait is implemented and in scope
[INFO] [stdout]    = note: the following trait defines an item `to_string`, perhaps you need to implement it:
[INFO] [stdout]            candidate #1: `ToString`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0599]: `TicketNewError` doesn't implement `std::fmt::Display`
[INFO] [stdout]   --> exercises/05_ticket_v2/12_thiserror/src/lib.rs:81:17
[INFO] [stdout]    |
[INFO] [stdout] 6  | enum TicketNewError {
[INFO] [stdout]    | ------------------- method `to_string` not found for this enum because it doesn't satisfy `TicketNewError: ToString` or `TicketNewError: std::fmt::Display`
[INFO] [stdout] ...
[INFO] [stdout] 81 |             err.to_string(),
[INFO] [stdout]    |                 ^^^^^^^^^ `TicketNewError` cannot be formatted with the default formatter
[INFO] [stdout]    |
[INFO] [stdout]    = note: the following trait bounds were not satisfied:
[INFO] [stdout]            `TicketNewError: std::fmt::Display`
[INFO] [stdout]            which is required by `TicketNewError: ToString`
[INFO] [stdout]    = note: in format strings you may be able to use `{:?}` (or {:#?} for pretty-print) instead
[INFO] [stdout] note: the trait `std::fmt::Display` must be implemented
[INFO] [stdout]   --> /rustc/44f3504e96c944ae54fc72b5f5008f53f7eda001/library/core/src/fmt/mod.rs:987:1
[INFO] [stdout]    = help: items from traits can only be used if the trait is implemented and in scope
[INFO] [stdout]    = note: the following trait defines an item `to_string`, perhaps you need to implement it:
[INFO] [stdout]            candidate #1: `ToString`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0599`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `thiserror_` (lib test) due to 4 previous errors
[INFO] running `Command { std: "docker" "inspect" "e54389ff26e485899fcfdf787e25df1890d6a3113fd2d52bc9a79cca96edb536", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e54389ff26e485899fcfdf787e25df1890d6a3113fd2d52bc9a79cca96edb536", kill_on_drop: false }`
[INFO] [stdout] e54389ff26e485899fcfdf787e25df1890d6a3113fd2d52bc9a79cca96edb536
