[INFO] cloning repository https://github.com/ThamizhiniyanCS/jetbrains-academy-learn-rust
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/ThamizhiniyanCS/jetbrains-academy-learn-rust" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FThamizhiniyanCS%2Fjetbrains-academy-learn-rust", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FThamizhiniyanCS%2Fjetbrains-academy-learn-rust'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 65f7172d47a08d0f8ebe154b33af91cf4a132969
[INFO] checking ThamizhiniyanCS/jetbrains-academy-learn-rust against master#82310651b93a594a3fd69015e1562186a080d94c for pr-145770
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FThamizhiniyanCS%2Fjetbrains-academy-learn-rust" "/workspace/builds/worker-7-tc1/source", kill_on_drop: false }`
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[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/ThamizhiniyanCS/jetbrains-academy-learn-rust
[INFO] finished tweaking git repo https://github.com/ThamizhiniyanCS/jetbrains-academy-learn-rust
[INFO] tweaked toml for git repo https://github.com/ThamizhiniyanCS/jetbrains-academy-learn-rust written to /workspace/builds/worker-7-tc1/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/ThamizhiniyanCS/jetbrains-academy-learn-rust on toolchain 82310651b93a594a3fd69015e1562186a080d94c
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+82310651b93a594a3fd69015e1562186a080d94c" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/ThamizhiniyanCS/jetbrains-academy-learn-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" "+82310651b93a594a3fd69015e1562186a080d94c" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded escargot v0.5.13
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-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@sha256:7ad1b28ee6f5f7f699f6cf7015098d6ccdd96d6f2d78dd06228f5b4c9faf309c" "/opt/rustwide/cargo-home/bin/cargo" "+82310651b93a594a3fd69015e1562186a080d94c" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
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[INFO] running `Command { std: "docker" "inspect" "daf1ed74d249d648fa2c63da9a5cc7b2da7d3b8dad9bd9995cc6a6da5f627024", kill_on_drop: false }`
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[INFO] [stdout] daf1ed74d249d648fa2c63da9a5cc7b2da7d3b8dad9bd9995cc6a6da5f627024
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[INFO] [stdout] becb8a4ac8111154e153f5ab28cdb28986d4619bb19af2ca2505f053c1c32112
[INFO] running `Command { std: "docker" "start" "-a" "becb8a4ac8111154e153f5ab28cdb28986d4619bb19af2ca2505f053c1c32112", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.94
[INFO] [stderr]    Compiling unicode-ident v1.0.18
[INFO] [stderr]    Compiling serde v1.0.219
[INFO] [stderr]    Compiling serde_json v1.0.140
[INFO] [stderr]     Checking ryu v1.0.20
[INFO] [stderr]    Compiling escargot v0.5.13
[INFO] [stderr]     Checking itoa v1.0.15
[INFO] [stderr]     Checking memchr v2.7.4
[INFO] [stderr]     Checking once_cell v1.21.1
[INFO] [stderr]     Checking log v0.4.26
[INFO] [stderr]    Compiling libc v0.2.171
[INFO] [stderr]    Compiling syn v1.0.109
[INFO] [stderr]    Compiling zerocopy v0.8.23
[INFO] [stderr]     Checking cfg-if v1.0.0
[INFO] [stderr]     Checking hello_macro v0.1.0 (/opt/rustwide/workdir/Macros/Procedural Macros/hello_macro)
[INFO] [stderr]     Checking advanced_errors_2 v0.1.0 (/opt/rustwide/workdir/Error Handling/Errors Primer/Advanced Errors 2)
[INFO] [stderr]     Checking modifying_a_hashmap v0.1.0 (/opt/rustwide/workdir/Common Collections/Hashmaps/More Fruits)
[INFO] [stderr]     Checking string_transformer v0.1.0 (/opt/rustwide/workdir/Common Collections/Strings/String Transformer)
[INFO] [stderr]     Checking loop_over_a_vector v0.1.0 (/opt/rustwide/workdir/Common Collections/Vectors/Loop Over a Vector)
[INFO] [stdout] warning: unreachable pattern
[INFO] [stdout]   --> Error Handling/Errors Primer/Advanced Errors 2/src/lib.rs:49:13
[INFO] [stdout]    |
[INFO] [stdout] 49 |             _ => write!(f, "unhandled error!"),
[INFO] [stdout]    |             ^ no value can reach this
[INFO] [stdout]    |
[INFO] [stdout] note: multiple earlier patterns match some of the same values
[INFO] [stdout]   --> Error Handling/Errors Primer/Advanced Errors 2/src/lib.rs:49:13
[INFO] [stdout]    |
[INFO] [stdout] 44 |             NoCity => write!(f, "no city name"),
[INFO] [stdout]    |             ------ matches some of the same values
[INFO] [stdout] 45 |             ParseFloat(e) => write!(f, "error parsing temperature: {}", e),
[INFO] [stdout]    |             ------------- matches some of the same values
[INFO] [stdout] 46 |             Empty => write!(f, "empty input"),
[INFO] [stdout]    |             ----- matches some of the same values
[INFO] [stdout] 47 |             BadLen => write!(f, "incorrect number of fields"),
[INFO] [stdout]    |             ------ matches some of the same values
[INFO] [stdout] 48 |             ParseInt(e) => write!(f, "error parsing year: {}", e),
[INFO] [stdout] 49 |             _ => write!(f, "unhandled error!"),
[INFO] [stdout]    |             ^ ...and 1 other patterns collectively make this unreachable
[INFO] [stdout]    = note: `#[warn(unreachable_patterns)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `year`
[INFO] [stdout]   --> Error Handling/Errors Primer/Advanced Errors 2/src/lib.rs:69:20
[INFO] [stdout]    |
[INFO] [stdout] 69 |             [city, year, temp] if city.is_empty() => return Err(ParseClimateError::NoCity),
[INFO] [stdout]    |                    ^^^^ help: if this is intentional, prefix it with an underscore: `_year`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `temp`
[INFO] [stdout]   --> Error Handling/Errors Primer/Advanced Errors 2/src/lib.rs:69:26
[INFO] [stdout]    |
[INFO] [stdout] 69 |             [city, year, temp] if city.is_empty() => return Err(ParseClimateError::NoCity),
[INFO] [stdout]    |                          ^^^^ help: if this is intentional, prefix it with an underscore: `_temp`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Checking license_it v0.1.0 (/opt/rustwide/workdir/Generic Types, Traits, and Lifetime/Traits/License It)
[INFO] [stderr]     Checking lamp_with_switchers v0.1.0 (/opt/rustwide/workdir/Standard Library Types/Smart Pointers/Switch the Lamp)
[INFO] [stderr]     Checking from_into v0.1.0 (/opt/rustwide/workdir/Standard Library Types/Type Conversions/From Into)
[INFO] [stderr]     Checking count_progress v0.1.0 (/opt/rustwide/workdir/Standard Library Types/Iterators/Count Progress)
[INFO] [stderr]     Checking advanced_errors v0.1.0 (/opt/rustwide/workdir/Error Handling/Errors Primer/Advanced Errors)
[INFO] [stderr]     Checking build_team_scores_table v0.1.0 (/opt/rustwide/workdir/Common Collections/Hashmaps/Build Scores Table)
[INFO] [stderr]     Checking compare_licenses v0.1.0 (/opt/rustwide/workdir/Generic Types, Traits, and Lifetime/Traits/Compare Licenses)
[INFO] [stderr]     Checking trait_bound_syntax v0.1.0 (/opt/rustwide/workdir/Generic Types, Traits, and Lifetime/Traits/Trait Bound Syntax)
[INFO] [stderr]     Checking loop_over_vector_with_iterators v0.1.0 (/opt/rustwide/workdir/Standard Library Types/Iterators/Loop Over Vector With Iterators)
[INFO] [stderr]     Checking process_some_strings v0.1.0 (/opt/rustwide/workdir/Common Collections/Strings/Process Some Strings)
[INFO] [stderr]     Checking declaring_a_vector v0.1.0 (/opt/rustwide/workdir/Common Collections/Vectors/Create a Vector on Your Own)
[INFO] [stderr]     Checking add_conditions v0.1.0 (/opt/rustwide/workdir/Common Programming Concepts/Conditions/Add Conditions)
[INFO] [stderr]     Checking try_from_into v0.1.0 (/opt/rustwide/workdir/Standard Library Types/Type Conversions/Try From Into)
[INFO] [stderr]     Checking declaring_a_hashmap v0.1.0 (/opt/rustwide/workdir/Common Collections/Hashmaps/Fruits Delivery)
[INFO] [stderr]     Checking combine_traits v0.1.0 (/opt/rustwide/workdir/Generic Types, Traits, and Lifetime/Traits/Combine Traits)
[INFO] [stderr]     Checking asref_and_asmut v0.1.0 (/opt/rustwide/workdir/Standard Library Types/Type Conversions/AsRef and AsMut)
[INFO] [stderr]     Checking fromstr v0.1.0 (/opt/rustwide/workdir/Standard Library Types/Type Conversions/FromStr)
[INFO] [stderr]     Checking errors6 v0.1.0 (/opt/rustwide/workdir/Error Handling/Errors Primer/Custom Errors)
[INFO] [stderr]     Checking vec_trait v0.1.0 (/opt/rustwide/workdir/Generic Types, Traits, and Lifetime/Traits/Vec Trait)
[INFO] [stderr]     Checking count_typed_cells v0.1.0 (/opt/rustwide/workdir/Common Collections/Vectors/Count Typed Cells)
[INFO] [stdout] warning: unnecessary parentheses around type
[INFO] [stdout]   --> Generic Types, Traits, and Lifetime/Traits/Combine Traits/src/lib.rs:21:24
[INFO] [stdout]    |
[INFO] [stdout] 21 | pub fn some_func(item: (impl SomeTrait + OtherTrait)) -> bool {
[INFO] [stdout]    |                        ^                           ^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_parens)]` on by default
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]    |
[INFO] [stdout] 21 - pub fn some_func(item: (impl SomeTrait + OtherTrait)) -> bool {
[INFO] [stdout] 21 + pub fn some_func(item: impl SomeTrait + OtherTrait) -> bool {
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Checking box_task v0.1.0 (/opt/rustwide/workdir/Standard Library Types/Smart Pointers/Box Task)
[INFO] [stderr]     Checking using_as v0.1.0 (/opt/rustwide/workdir/Standard Library Types/Type Conversions/Using As)
[INFO] [stderr]     Checking string_trait v0.1.0 (/opt/rustwide/workdir/Generic Types, Traits, and Lifetime/Traits/String Trait)
[INFO] [stderr]     Checking generics_in_structs v0.1.0 (/opt/rustwide/workdir/Generic Types, Traits, and Lifetime/Generic Data Types/Generics in Structs)
[INFO] [stderr]     Checking capitalize_first v0.1.0 (/opt/rustwide/workdir/Standard Library Types/Iterators/Capitalize first)
[INFO] [stderr]     Checking trim_a_string v0.1.0 (/opt/rustwide/workdir/Understanding Ownership/The Slice Type/Trim a String)
[INFO] [stderr]     Checking errors5 v0.1.0 (/opt/rustwide/workdir/Error Handling/Errors Primer/Multiple Errors)
[INFO] [stderr]     Checking home_alone v0.1.0 (/opt/rustwide/workdir/Modules/Modules/Home Alone at Day X)
[INFO] [stderr]     Checking use_cow v0.1.0 (/opt/rustwide/workdir/Standard Library Types/Smart Pointers/Use Cow)
[INFO] [stderr]     Checking workers_in_the_engine v0.1.0 (/opt/rustwide/workdir/Standard Library Types/Smart Pointers/Workers in the Engine)
[INFO] [stderr]     Checking optional_value v0.1.0 (/opt/rustwide/workdir/Common Collections/Options/Optional Value)
[INFO] [stderr]     Checking iterator3 v0.1.0 (/opt/rustwide/workdir/Standard Library Types/Iterators/Iterator)
[INFO] [stderr]     Checking times_two_tests v0.1.0 (/opt/rustwide/workdir/Writing Automated Tests/Running and Organizing Tests/Times Two Tests)
[INFO] [stderr]     Checking submodules v0.1.0 (/opt/rustwide/workdir/Writing Automated Tests/Running and Organizing Tests/Submodules in Integration Tests)
[INFO] [stdout] warning: unused imports: `DivideByZero` and `NotDivisible`
[INFO] [stdout]  --> Standard Library Types/Iterators/Iterator/src/lib.rs:1:28
[INFO] [stdout]   |
[INFO] [stdout] 1 | use crate::DivisionError::{DivideByZero, NotDivisible};
[INFO] [stdout]   |                            ^^^^^^^^^^^^  ^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Checking calculate_price v0.1.0 (/opt/rustwide/workdir/Common Programming Concepts/Variables, Functions, and Conditions Test/Calculate Price)
[INFO] [stderr]     Checking iterators4 v0.1.0 (/opt/rustwide/workdir/Standard Library Types/Iterators/Factorial)
[INFO] [stderr]     Checking matching_result v0.1.0 (/opt/rustwide/workdir/Error Handling/Error Handling/Matching Result)
[INFO] [stderr]     Checking returning_result v0.1.0 (/opt/rustwide/workdir/Error Handling/Error Handling/Returning Result)
[INFO] [stderr]     Checking if_task v0.1.0 (/opt/rustwide/workdir/Common Programming Concepts/Conditions/If Task)
[INFO] [stderr]     Checking use_option v0.1.0 (/opt/rustwide/workdir/Common Collections/Options/Use Option)
[INFO] [stderr]     Checking integration_tests v0.1.0 (/opt/rustwide/workdir/Writing Automated Tests/Running and Organizing Tests/Integration Tests)
[INFO] [stderr]     Checking result1 v0.1.0 (/opt/rustwide/workdir/Error Handling/Errors Primer/Positive Nonzero Integer)
[INFO] [stderr]     Checking quote v1.0.40
[INFO] [stderr]    Compiling syn v2.0.100
[INFO] [stderr]     Checking getrandom v0.2.15
[INFO] [stderr]     Checking rand_core v0.6.4
[INFO] [stderr]     Checking ppv-lite86 v0.2.21
[INFO] [stderr]     Checking checking_results_with_the_assert_macro v0.1.0 (/opt/rustwide/workdir/Writing Automated Tests/How to Write Tests/Checking Results with the assert Macro)
[INFO] [stderr]     Checking example_structs v0.1.0 (/opt/rustwide/workdir/Structs, Methods, Enums, and Pattern Matching/Structs/Dealing with Rectangles)
[INFO] [stderr]     Checking mixing_generic_types v0.1.0 (/opt/rustwide/workdir/Generic Types, Traits, and Lifetime/Generic Data Types/Mixing Generic Types)
[INFO] [stdout] warning: struct `Rectangle` is never constructed
[INFO] [stdout]  --> Writing Automated Tests/How to Write Tests/Checking Results with the assert Macro/src/lib.rs:2:8
[INFO] [stdout]   |
[INFO] [stdout] 2 | struct Rectangle {
[INFO] [stdout]   |        ^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `can_hold` is never used
[INFO] [stdout]  --> Writing Automated Tests/How to Write Tests/Checking Results with the assert Macro/src/lib.rs:8:8
[INFO] [stdout]   |
[INFO] [stdout] 7 | impl Rectangle {
[INFO] [stdout]   | -------------- method in this implementation
[INFO] [stdout] 8 |     fn can_hold(&self, other: &Rectangle) -> bool {
[INFO] [stdout]   |        ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Checking borrowing_values_with_references v0.1.0 (/opt/rustwide/workdir/Understanding Ownership/References and Borrowing/Borrowing Values with References)
[INFO] [stderr]     Checking providing_new_names_with_the_as_keyword v0.1.0 (/opt/rustwide/workdir/Modules/Modules/Providing New Names with the as Keyword)
[INFO] [stderr]     Checking traits_as_parameters v0.1.0 (/opt/rustwide/workdir/Generic Types, Traits, and Lifetime/Traits/Traits as Parameters)
[INFO] [stderr]     Checking creating_instances_from_other_instances v0.1.0 (/opt/rustwide/workdir/Structs, Methods, Enums, and Pattern Matching/Structs/Creating Instances From Other Instances)
[INFO] [stdout] warning: function `function1` is never used
[INFO] [stdout]  --> Modules/Modules/Providing New Names with the as Keyword/src/lib.rs:4:4
[INFO] [stdout]   |
[INFO] [stdout] 4 | fn function1() -> Result {
[INFO] [stdout]   |    ^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `function2` is never used
[INFO] [stdout]  --> Modules/Modules/Providing New Names with the as Keyword/src/lib.rs:8:4
[INFO] [stdout]   |
[INFO] [stdout] 8 | fn function2() -> IoResult<()> {
[INFO] [stdout]   |    ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Checking course_view v0.1.0 (/opt/rustwide/workdir/Introduction/Getting started/Course View)
[INFO] [stdout] warning: unused variable: `item`
[INFO] [stdout]   --> Generic Types, Traits, and Lifetime/Traits/Traits as Parameters/src/main.rs:13:28
[INFO] [stdout]    |
[INFO] [stdout] 13 | pub fn notify2<T: Summary>(item: &T) {}
[INFO] [stdout]    |                            ^^^^ help: if this is intentional, prefix it with an underscore: `_item`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `email`, `sign_in_count`, and `active` are never read
[INFO] [stdout]  --> Structs, Methods, Enums, and Pattern Matching/Structs/Creating Instances From Other Instances/src/main.rs:3:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | struct User {
[INFO] [stdout]   |        ---- fields in this struct
[INFO] [stdout] 2 |     username: String,
[INFO] [stdout] 3 |     email: String,
[INFO] [stdout]   |     ^^^^^
[INFO] [stdout] 4 |     sign_in_count: u64,
[INFO] [stdout]   |     ^^^^^^^^^^^^^
[INFO] [stdout] 5 |     active: bool,
[INFO] [stdout]   |     ^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `item1`
[INFO] [stdout]   --> Generic Types, Traits, and Lifetime/Traits/Traits as Parameters/src/main.rs:15:28
[INFO] [stdout]    |
[INFO] [stdout] 15 | pub fn notify3<T: Summary>(item1: &T, item2: &T) {}
[INFO] [stdout]    |                            ^^^^^ help: if this is intentional, prefix it with an underscore: `_item1`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `item2`
[INFO] [stdout]   --> Generic Types, Traits, and Lifetime/Traits/Traits as Parameters/src/main.rs:15:39
[INFO] [stdout]    |
[INFO] [stdout] 15 | pub fn notify3<T: Summary>(item1: &T, item2: &T) {}
[INFO] [stdout]    |                                       ^^^^^ help: if this is intentional, prefix it with an underscore: `_item2`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `item`
[INFO] [stdout]   --> Generic Types, Traits, and Lifetime/Traits/Traits as Parameters/src/main.rs:18:16
[INFO] [stdout]    |
[INFO] [stdout] 18 | pub fn notify4(item: &(impl Summary + Display)) {}
[INFO] [stdout]    |                ^^^^ help: if this is intentional, prefix it with an underscore: `_item`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `item`
[INFO] [stdout]   --> Generic Types, Traits, and Lifetime/Traits/Traits as Parameters/src/main.rs:20:38
[INFO] [stdout]    |
[INFO] [stdout] 20 | pub fn notify5<T: Summary + Display>(item: &T) {}
[INFO] [stdout]    |                                      ^^^^ help: if this is intentional, prefix it with an underscore: `_item`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `t`
[INFO] [stdout]   --> Generic Types, Traits, and Lifetime/Traits/Traits as Parameters/src/main.rs:23:56
[INFO] [stdout]    |
[INFO] [stdout] 23 | fn some_function<T: Display + Clone, U: Clone + Debug>(t: &T, u: &U) -> i32 { 0 }
[INFO] [stdout]    |                                                        ^ help: if this is intentional, prefix it with an underscore: `_t`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `u`
[INFO] [stdout]   --> Generic Types, Traits, and Lifetime/Traits/Traits as Parameters/src/main.rs:23:63
[INFO] [stdout]    |
[INFO] [stdout] 23 | fn some_function<T: Display + Clone, U: Clone + Debug>(t: &T, u: &U) -> i32 { 0 }
[INFO] [stdout]    |                                                               ^ help: if this is intentional, prefix it with an underscore: `_u`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `t`
[INFO] [stdout]   --> Generic Types, Traits, and Lifetime/Traits/Traits as Parameters/src/main.rs:24:25
[INFO] [stdout]    |
[INFO] [stdout] 24 | fn some_function2<T, U>(t: &T, u: &U) -> i32
[INFO] [stdout]    |                         ^ help: if this is intentional, prefix it with an underscore: `_t`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `u`
[INFO] [stdout]   --> Generic Types, Traits, and Lifetime/Traits/Traits as Parameters/src/main.rs:24:32
[INFO] [stdout]    |
[INFO] [stdout] 24 | fn some_function2<T, U>(t: &T, u: &U) -> i32
[INFO] [stdout]    |                                ^ help: if this is intentional, prefix it with an underscore: `_u`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `some_function` is never used
[INFO] [stdout]   --> Generic Types, Traits, and Lifetime/Traits/Traits as Parameters/src/main.rs:23:4
[INFO] [stdout]    |
[INFO] [stdout] 23 | fn some_function<T: Display + Clone, U: Clone + Debug>(t: &T, u: &U) -> i32 { 0 }
[INFO] [stdout]    |    ^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `some_function2` is never used
[INFO] [stdout]   --> Generic Types, Traits, and Lifetime/Traits/Traits as Parameters/src/main.rs:24:4
[INFO] [stdout]    |
[INFO] [stdout] 24 | fn some_function2<T, U>(t: &T, u: &U) -> i32
[INFO] [stdout]    |    ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Checking creating_a_new_string v0.1.0 (/opt/rustwide/workdir/Common Collections/Strings/Creating a New String)
[INFO] [stderr]     Checking patterns_that_bind_to_values v0.1.0 (/opt/rustwide/workdir/Structs, Methods, Enums, and Pattern Matching/Pattern Matching/Patterns that Bind to Values)
[INFO] [stdout] warning: unused variable: `s`
[INFO] [stdout]  --> Common Collections/Strings/Creating a New String/src/main.rs:6:9
[INFO] [stdout]   |
[INFO] [stdout] 6 |     let s = data.to_string();
[INFO] [stdout]   |         ^ help: if this is intentional, prefix it with an underscore: `_s`
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `s`
[INFO] [stdout]  --> Common Collections/Strings/Creating a New String/src/main.rs:9:9
[INFO] [stdout]   |
[INFO] [stdout] 9 |     let s = "initial contents".to_string();
[INFO] [stdout]   |         ^ help: if this is intentional, prefix it with an underscore: `_s`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `hello`
[INFO] [stdout]   --> Common Collections/Strings/Creating a New String/src/main.rs:11:9
[INFO] [stdout]    |
[INFO] [stdout] 11 |     let hello = String::from("السلام عليكم");
[INFO] [stdout]    |         ^^^^^ help: if this is intentional, prefix it with an underscore: `_hello`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `hello`
[INFO] [stdout]   --> Common Collections/Strings/Creating a New String/src/main.rs:12:9
[INFO] [stdout]    |
[INFO] [stdout] 12 |     let hello = String::from("Dobrý den");
[INFO] [stdout]    |         ^^^^^ help: if this is intentional, prefix it with an underscore: `_hello`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `hello`
[INFO] [stdout]   --> Common Collections/Strings/Creating a New String/src/main.rs:13:9
[INFO] [stdout]    |
[INFO] [stdout] 13 |     let hello = String::from("Hello");
[INFO] [stdout]    |         ^^^^^ help: if this is intentional, prefix it with an underscore: `_hello`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `hello`
[INFO] [stdout]   --> Common Collections/Strings/Creating a New String/src/main.rs:14:9
[INFO] [stdout]    |
[INFO] [stdout] 14 |     let hello = String::from("שָׁלוֹם");
[INFO] [stdout]    |         ^^^^^ help: if this is intentional, prefix it with an underscore: `_hello`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `hello`
[INFO] [stdout]   --> Common Collections/Strings/Creating a New String/src/main.rs:15:9
[INFO] [stdout]    |
[INFO] [stdout] 15 |     let hello = String::from("नमस्ते");
[INFO] [stdout]    |         ^^^^^ help: if this is intentional, prefix it with an underscore: `_hello`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `hello`
[INFO] [stdout]   --> Common Collections/Strings/Creating a New String/src/main.rs:16:9
[INFO] [stdout]    |
[INFO] [stdout] 16 |     let hello = String::from("こんにちは");
[INFO] [stdout]    |         ^^^^^ help: if this is intentional, prefix it with an underscore: `_hello`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `hello`
[INFO] [stdout]   --> Common Collections/Strings/Creating a New String/src/main.rs:17:9
[INFO] [stdout]    |
[INFO] [stdout] 17 |     let hello = String::from("안녕하세요");
[INFO] [stdout]    |         ^^^^^ help: if this is intentional, prefix it with an underscore: `_hello`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `hello`
[INFO] [stdout]   --> Common Collections/Strings/Creating a New String/src/main.rs:18:9
[INFO] [stdout]    |
[INFO] [stdout] 18 |     let hello = String::from("你好");
[INFO] [stdout]    |         ^^^^^ help: if this is intentional, prefix it with an underscore: `_hello`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `hello`
[INFO] [stdout]   --> Common Collections/Strings/Creating a New String/src/main.rs:19:9
[INFO] [stdout]    |
[INFO] [stdout] 19 |     let hello = String::from("Olá");
[INFO] [stdout]    |         ^^^^^ help: if this is intentional, prefix it with an underscore: `_hello`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `hello`
[INFO] [stdout]   --> Common Collections/Strings/Creating a New String/src/main.rs:20:9
[INFO] [stdout]    |
[INFO] [stdout] 20 |     let hello = String::from("Здравствуйте");
[INFO] [stdout]    |         ^^^^^ help: if this is intentional, prefix it with an underscore: `_hello`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `hello`
[INFO] [stdout]   --> Common Collections/Strings/Creating a New String/src/main.rs:21:9
[INFO] [stdout]    |
[INFO] [stdout] 21 |     let hello = String::from("Hola");
[INFO] [stdout]    |         ^^^^^ help: if this is intentional, prefix it with an underscore: `_hello`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Checking hello_macro_derive v0.1.0 (/opt/rustwide/workdir/Macros/Procedural Macros/hello_macro_derive)
[INFO] [stderr]     Checking duplicated_code_fragments v0.1.0 (/opt/rustwide/workdir/Generic Types, Traits, and Lifetime/Intro/Duplicated Code Fragments)
[INFO] [stdout] warning: unused variable: `value`
[INFO] [stdout]   --> Structs, Methods, Enums, and Pattern Matching/Pattern Matching/Patterns that Bind to Values/src/main.rs:28:9
[INFO] [stdout]    |
[INFO] [stdout] 28 |     let value = value_in_cents(Coin::Quarter(UsState::Alabama));
[INFO] [stdout]    |         ^^^^^ help: if this is intentional, prefix it with an underscore: `_value`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant `Alaska` is never constructed
[INFO] [stdout]  --> Structs, Methods, Enums, and Pattern Matching/Pattern Matching/Patterns that Bind to Values/src/main.rs:4:5
[INFO] [stdout]   |
[INFO] [stdout] 2 | enum UsState {
[INFO] [stdout]   |      ------- variant in this enum
[INFO] [stdout] 3 |     Alabama,
[INFO] [stdout] 4 |     Alaska,
[INFO] [stdout]   |     ^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `UsState` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variants `Penny`, `Nickel`, and `Dime` are never constructed
[INFO] [stdout]   --> Structs, Methods, Enums, and Pattern Matching/Pattern Matching/Patterns that Bind to Values/src/main.rs:9:5
[INFO] [stdout]    |
[INFO] [stdout] 8  | enum Coin {
[INFO] [stdout]    |      ---- variants in this enum
[INFO] [stdout] 9  |     Penny,
[INFO] [stdout]    |     ^^^^^
[INFO] [stdout] 10 |     Nickel,
[INFO] [stdout]    |     ^^^^^^
[INFO] [stdout] 11 |     Dime,
[INFO] [stdout]    |     ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Checking functions_intro v0.1.0 (/opt/rustwide/workdir/Common Programming Concepts/Functions/Intro)
[INFO] [stderr]     Checking intro_tests v0.1.0 (/opt/rustwide/workdir/Writing Automated Tests/How to Write Tests/Intro)
[INFO] [stderr]     Checking if_let v0.1.0 (/opt/rustwide/workdir/Structs, Methods, Enums, and Pattern Matching/Pattern Matching/If Let)
[INFO] [stderr]     Checking methods_that_produce_other_iterators v0.1.0 (/opt/rustwide/workdir/Standard Library Types/Iterators/Methods that Produce Other Iterators)
[INFO] [stderr]     Checking functions_with_return_values_ v0.1.0 (/opt/rustwide/workdir/Common Programming Concepts/Functions/Functions with Return Values)
[INFO] [stderr]     Checking macros3 v0.1.0 (/opt/rustwide/workdir/Macros/Declarative Macros/Outside of Module)
[INFO] [stderr]     Checking rand_chacha v0.3.1
[INFO] [stderr]     Checking channels_and_ownership_transference v0.1.0 (/opt/rustwide/workdir/Fearless Concurrency/Using Message Passing to Transfer Data Between Threads/Channels and Ownership Transference)
[INFO] [stderr]     Checking propagating_errors_in_main v0.1.0 (/opt/rustwide/workdir/Error Handling/Error Handling/Propagating Errors Limitations)
[INFO] [stdout] warning: variable `count` is assigned to, but never used
[INFO] [stdout]   --> Structs, Methods, Enums, and Pattern Matching/Pattern Matching/If Let/src/main.rs:21:13
[INFO] [stdout]    |
[INFO] [stdout] 21 |     let mut count = 0;
[INFO] [stdout]    |             ^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: consider using `_count` instead
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `count` is never read
[INFO] [stdout]   --> Structs, Methods, Enums, and Pattern Matching/Pattern Matching/If Let/src/main.rs:26:9
[INFO] [stdout]    |
[INFO] [stdout] 26 |         count += 1;
[INFO] [stdout]    |         ^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = help: maybe it is overwritten before being read?
[INFO] [stdout]    = note: `#[warn(unused_assignments)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variants `Alabama` and `Alaska` are never constructed
[INFO] [stdout]  --> Structs, Methods, Enums, and Pattern Matching/Pattern Matching/If Let/src/main.rs:3:5
[INFO] [stdout]   |
[INFO] [stdout] 2 | enum UsState {
[INFO] [stdout]   |      ------- variants in this enum
[INFO] [stdout] 3 |     Alabama,
[INFO] [stdout]   |     ^^^^^^^
[INFO] [stdout] 4 |     Alaska,
[INFO] [stdout]   |     ^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `UsState` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variants `Penny`, `Nickel`, and `Quarter` are never constructed
[INFO] [stdout]   --> Structs, Methods, Enums, and Pattern Matching/Pattern Matching/If Let/src/main.rs:9:5
[INFO] [stdout]    |
[INFO] [stdout] 8  | enum Coin {
[INFO] [stdout]    |      ---- variants in this enum
[INFO] [stdout] 9  |     Penny,
[INFO] [stdout]    |     ^^^^^
[INFO] [stdout] 10 |     Nickel,
[INFO] [stdout]    |     ^^^^^^
[INFO] [stdout] 11 |     Dime,
[INFO] [stdout] 12 |     Quarter(UsState),
[INFO] [stdout]    |     ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Checking rectangles v0.1.0 (/opt/rustwide/workdir/Standard Library Types/Closures/Example sort_by_key)
[INFO] [stdout] warning: unused variable: `f`
[INFO] [stdout]   --> Error Handling/Error Handling/Propagating Errors Limitations/src/main.rs:11:9
[INFO] [stdout]    |
[INFO] [stdout] 11 |     let f = File::open("hello.txt")?;
[INFO] [stdout]    |         ^ help: if this is intentional, prefix it with an underscore: `_f`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Checking sending_multiple_values_and_seeing_the_receiver_waiting v0.1.0 (/opt/rustwide/workdir/Fearless Concurrency/Using Message Passing to Transfer Data Between Threads/Sending Multiple Values and Seeing the Receiver Waiting)
[INFO] [stderr]     Checking boolean v0.1.0 (/opt/rustwide/workdir/Common Programming Concepts/Basic Data Types/Boolean Test)
[INFO] [stdout] error[E0382]: borrow of moved value: `val`
[INFO] [stdout]   --> Fearless Concurrency/Using Message Passing to Transfer Data Between Threads/Channels and Ownership Transference/src/main.rs:12:31
[INFO] [stdout]    |
[INFO] [stdout] 8  |         let val = String::from("hi");
[INFO] [stdout]    |             --- move occurs because `val` has type `String`, which does not implement the `Copy` trait
[INFO] [stdout] 9  |         tx.send(val).unwrap();
[INFO] [stdout]    |                 --- value moved here
[INFO] [stdout] ...
[INFO] [stdout] 12 |         println!("val is {}", val);
[INFO] [stdout]    |                               ^^^ value borrowed here after move
[INFO] [stdout]    |
[INFO] [stdout]    = note: this error originates in the macro `$crate::format_args_nl` which comes from the expansion of the macro `println` (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 E0382`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `channels_and_ownership_transference` (bin "channels_and_ownership_transference") due to 1 previous error
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stdout] warning: unused variable: `sort_operations`
[INFO] [stdout]   --> Standard Library Types/Closures/Example sort_by_key/src/main.rs:29:13
[INFO] [stdout]    |
[INFO] [stdout] 29 |     let mut sort_operations: Vec<Rectangle> = vec![];
[INFO] [stdout]    |             ^^^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_sort_operations`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `value`
[INFO] [stdout]   --> Standard Library Types/Closures/Example sort_by_key/src/main.rs:30:9
[INFO] [stdout]    |
[INFO] [stdout] 30 |     let value = String::from("by key called");
[INFO] [stdout]    |         ^^^^^ help: if this is intentional, prefix it with an underscore: `_value`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> Standard Library Types/Closures/Example sort_by_key/src/main.rs:29:9
[INFO] [stdout]    |
[INFO] [stdout] 29 |     let mut sort_operations: Vec<Rectangle> = vec![];
[INFO] [stdout]    |         ----^^^^^^^^^^^^^^^
[INFO] [stdout]    |         |
[INFO] [stdout]    |         help: remove this `mut`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_mut)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `height` is never read
[INFO] [stdout]  --> Standard Library Types/Closures/Example sort_by_key/src/main.rs:4:5
[INFO] [stdout]   |
[INFO] [stdout] 2 | struct Rectangle {
[INFO] [stdout]   |        --------- field in this struct
[INFO] [stdout] 3 |     width: u32,
[INFO] [stdout] 4 |     height: u32,
[INFO] [stdout]   |     ^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `Rectangle` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "becb8a4ac8111154e153f5ab28cdb28986d4619bb19af2ca2505f053c1c32112", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "becb8a4ac8111154e153f5ab28cdb28986d4619bb19af2ca2505f053c1c32112", kill_on_drop: false }`
[INFO] [stdout] becb8a4ac8111154e153f5ab28cdb28986d4619bb19af2ca2505f053c1c32112