[INFO] cloning repository https://github.com/steephengeorge/rustlings
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/steephengeorge/rustlings" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fsteephengeorge%2Frustlings", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fsteephengeorge%2Frustlings'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 2118acd43f54ebf9edbce7eb837b6aa37e58d04f
[INFO] checking steephengeorge/rustlings against try#998b6603a58e47f42ccce7a67943234e96b6839e for pr-143170
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fsteephengeorge%2Frustlings" "/workspace/builds/worker-5-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-5-tc2/source'...
[INFO] [stderr] done.
[INFO] removed /workspace/builds/worker-5-tc2/source/.cargo/config.toml
[INFO] started tweaking git repo https://github.com/steephengeorge/rustlings
[INFO] finished tweaking git repo https://github.com/steephengeorge/rustlings
[INFO] tweaked toml for git repo https://github.com/steephengeorge/rustlings written to /workspace/builds/worker-5-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/steephengeorge/rustlings on toolchain 998b6603a58e47f42ccce7a67943234e96b6839e
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+998b6603a58e47f42ccce7a67943234e96b6839e" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/steephengeorge/rustlings 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" "+998b6603a58e47f42ccce7a67943234e96b6839e" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr] warning: virtual workspace defaulting to `resolver = "1"` despite one or more workspace members being on edition 2021 which implies `resolver = "2"`
[INFO] [stderr] note: to keep the current resolver, specify `workspace.resolver = "1"` in the workspace root's manifest
[INFO] [stderr] note: to use the edition 2021 resolver, specify `workspace.resolver = "2"` in the workspace root's manifest
[INFO] [stderr] note: for more details see https://doc.rust-lang.org/cargo/reference/resolver.html#resolver-versions
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-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@sha256:90999bfc7ae267e83380e433d8e61a7c072ca6729e92edbae886d3423b3a6f4c" "/opt/rustwide/cargo-home/bin/cargo" "+998b6603a58e47f42ccce7a67943234e96b6839e" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 7722d015414474ba758c0e0a17bfffe2c1ae1cbf41af0436476a23322145f5ea
[INFO] running `Command { std: "docker" "start" "-a" "7722d015414474ba758c0e0a17bfffe2c1ae1cbf41af0436476a23322145f5ea", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "7722d015414474ba758c0e0a17bfffe2c1ae1cbf41af0436476a23322145f5ea", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "7722d015414474ba758c0e0a17bfffe2c1ae1cbf41af0436476a23322145f5ea", kill_on_drop: false }`
[INFO] [stdout] 7722d015414474ba758c0e0a17bfffe2c1ae1cbf41af0436476a23322145f5ea
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-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@sha256:90999bfc7ae267e83380e433d8e61a7c072ca6729e92edbae886d3423b3a6f4c" "/opt/rustwide/cargo-home/bin/cargo" "+998b6603a58e47f42ccce7a67943234e96b6839e" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 7a2186a710a57cabea7a4e52de5aa414ab0469ce955273e01528e4df21a2b793
[INFO] running `Command { std: "docker" "start" "-a" "7a2186a710a57cabea7a4e52de5aa414ab0469ce955273e01528e4df21a2b793", kill_on_drop: false }`
[INFO] [stderr] warning: virtual workspace defaulting to `resolver = "1"` despite one or more workspace members being on edition 2021 which implies `resolver = "2"`
[INFO] [stderr] note: to keep the current resolver, specify `workspace.resolver = "1"` in the workspace root's manifest
[INFO] [stderr] note: to use the edition 2021 resolver, specify `workspace.resolver = "2"` in the workspace root's manifest
[INFO] [stderr] note: for more details see https://doc.rust-lang.org/cargo/reference/resolver.html#resolver-versions
[INFO] [stderr]    Compiling proc-macro2 v1.0.78
[INFO] [stderr]    Compiling serde v1.0.196
[INFO] [stderr]    Compiling serde_json v1.0.113
[INFO] [stderr]     Checking itoa v1.0.10
[INFO] [stderr]    Compiling escargot v0.5.8
[INFO] [stderr]     Checking ryu v1.0.16
[INFO] [stderr]     Checking log v0.4.20
[INFO] [stderr]     Checking once_cell v1.19.0
[INFO] [stderr]    Compiling syn v1.0.109
[INFO] [stderr]    Compiling libc v0.2.152
[INFO] [stderr]     Checking unicode-ident v1.0.12
[INFO] [stderr]     Checking hello_macro v0.1.0 (/opt/rustwide/workdir/Macros/Procedural Macros/hello_macro)
[INFO] [stderr]     Checking add_conditions v0.1.0 (/opt/rustwide/workdir/Common Programming Concepts/Conditions/Add Conditions)
[INFO] [stderr]     Checking string_transformer v0.1.0 (/opt/rustwide/workdir/Common Collections/Strings/String Transformer)
[INFO] [stderr]     Checking trait_bound_syntax v0.1.0 (/opt/rustwide/workdir/Generic Types, Traits, and Lifetime/Traits/Trait Bound Syntax)
[INFO] [stderr]     Checking license_it v0.1.0 (/opt/rustwide/workdir/Generic Types, Traits, and Lifetime/Traits/License It)
[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 lamp_with_switchers v0.1.0 (/opt/rustwide/workdir/Standard Library Types/Smart Pointers/Switch the Lamp)
[INFO] [stderr]     Checking vec_trait v0.1.0 (/opt/rustwide/workdir/Generic Types, Traits, and Lifetime/Traits/Vec Trait)
[INFO] [stderr]     Checking declaring_a_vector v0.1.0 (/opt/rustwide/workdir/Common Collections/Vectors/Create a Vector on Your Own)
[INFO] [stderr]     Checking capitalize_first v0.1.0 (/opt/rustwide/workdir/Standard Library Types/Iterators/Capitalize first)
[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 from_into v0.1.0 (/opt/rustwide/workdir/Standard Library Types/Type Conversions/From Into)
[INFO] [stderr]     Checking combine_traits v0.1.0 (/opt/rustwide/workdir/Generic Types, Traits, and Lifetime/Traits/Combine Traits)
[INFO] [stderr]     Checking advanced_errors v0.1.0 (/opt/rustwide/workdir/Error Handling/Errors Primer/Advanced Errors)
[INFO] [stderr]     Checking compare_licenses v0.1.0 (/opt/rustwide/workdir/Generic Types, Traits, and Lifetime/Traits/Compare Licenses)
[INFO] [stderr]     Checking errors6 v0.1.0 (/opt/rustwide/workdir/Error Handling/Errors Primer/Custom Errors)
[INFO] [stderr]     Checking asref_and_asmut v0.1.0 (/opt/rustwide/workdir/Standard Library Types/Type Conversions/AsRef and AsMut)
[INFO] [stderr]     Checking count_progress v0.1.0 (/opt/rustwide/workdir/Standard Library Types/Iterators/Count Progress)
[INFO] [stderr]     Checking loop_over_a_vector v0.1.0 (/opt/rustwide/workdir/Common Collections/Vectors/Loop Over a Vector)
[INFO] [stderr]     Checking using_as v0.1.0 (/opt/rustwide/workdir/Standard Library Types/Type Conversions/Using As)
[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 count_typed_cells v0.1.0 (/opt/rustwide/workdir/Common Collections/Vectors/Count Typed Cells)
[INFO] [stderr]     Checking errors5 v0.1.0 (/opt/rustwide/workdir/Error Handling/Errors Primer/Multiple Errors)
[INFO] [stdout] warning: unused import: `write`
[INFO] [stdout]  --> Error Handling/Errors Primer/Advanced Errors 2/src/lib.rs:2:42
[INFO] [stdout]   |
[INFO] [stdout] 2 | use std::fmt::{self, Display, Formatter, write};
[INFO] [stdout]   |                                          ^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Checking build_team_scores_table v0.1.0 (/opt/rustwide/workdir/Common Collections/Hashmaps/Build Scores Table)
[INFO] [stderr]     Checking try_from_into v0.1.0 (/opt/rustwide/workdir/Standard Library Types/Type Conversions/Try From Into)
[INFO] [stderr]     Checking box_task v0.1.0 (/opt/rustwide/workdir/Standard Library Types/Smart Pointers/Box Task)
[INFO] [stdout] warning: unreachable pattern
[INFO] [stdout]   --> Error Handling/Errors Primer/Advanced Errors 2/src/lib.rs:50:13
[INFO] [stdout]    |
[INFO] [stdout] 50 |             _ => 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:50:13
[INFO] [stdout]    |
[INFO] [stdout] 45 |             Empty => write!(f, "empty input"),
[INFO] [stdout]    |             ----- matches some of the same values
[INFO] [stdout] 46 |             BadLen => write!(f, "incorrect number of fields"),
[INFO] [stdout]    |             ------ matches some of the same values
[INFO] [stdout] 47 |             NoCity => write!(f, "no city name"),
[INFO] [stdout]    |             ------ matches some of the same values
[INFO] [stdout] 48 |             ParseFloat(e) => write!(f, "error parsing temperature: {}", e),
[INFO] [stdout]    |             ------------- matches some of the same values
[INFO] [stdout] 49 |             ParseInt(e) => write!(f, "error parsing year: {}", e),
[INFO] [stdout] 50 |             _ => 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:70:20
[INFO] [stdout]    |
[INFO] [stdout] 70 |             [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:70:26
[INFO] [stdout]    |
[INFO] [stdout] 70 |             [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 fromstr v0.1.0 (/opt/rustwide/workdir/Standard Library Types/Type Conversions/FromStr)
[INFO] [stderr]     Checking declaring_a_hashmap v0.1.0 (/opt/rustwide/workdir/Common Collections/Hashmaps/Fruits Delivery)
[INFO] [stderr]     Checking trim_a_string v0.1.0 (/opt/rustwide/workdir/Understanding Ownership/The Slice Type/Trim a String)
[INFO] [stderr]     Checking string_trait v0.1.0 (/opt/rustwide/workdir/Generic Types, Traits, and Lifetime/Traits/String Trait)
[INFO] [stderr]     Checking process_some_strings v0.1.0 (/opt/rustwide/workdir/Common Collections/Strings/Process Some Strings)
[INFO] [stdout] warning: unused import: `std::any::type_name`
[INFO] [stdout]  --> Standard Library Types/Type Conversions/FromStr/src/lib.rs:1:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::any::type_name;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::fmt::Pointer`
[INFO] [stdout]  --> Common Collections/Strings/Process Some Strings/src/lib.rs:1:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::fmt::Pointer;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Checking home_alone v0.1.0 (/opt/rustwide/workdir/Modules/Modules/Home Alone at Day X)
[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 use_cow v0.1.0 (/opt/rustwide/workdir/Standard Library Types/Smart Pointers/Use Cow)
[INFO] [stderr]     Checking returning_result v0.1.0 (/opt/rustwide/workdir/Error Handling/Error Handling/Returning Result)
[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 integration_tests v0.1.0 (/opt/rustwide/workdir/Writing Automated Tests/Running and Organizing Tests/Integration Tests)
[INFO] [stderr]     Checking calculate_price v0.1.0 (/opt/rustwide/workdir/Common Programming Concepts/Variables, Functions, and Conditions Test/Calculate Price)
[INFO] [stderr]     Checking iterator3 v0.1.0 (/opt/rustwide/workdir/Standard Library Types/Iterators/Iterator)
[INFO] [stderr]     Checking matching_result v0.1.0 (/opt/rustwide/workdir/Error Handling/Error Handling/Matching Result)
[INFO] [stderr]     Checking submodules v0.1.0 (/opt/rustwide/workdir/Writing Automated Tests/Running and Organizing Tests/Submodules in Integration Tests)
[INFO] [stderr]     Checking if_task v0.1.0 (/opt/rustwide/workdir/Common Programming Concepts/Conditions/If Task)
[INFO] [stderr]     Checking optional_value v0.1.0 (/opt/rustwide/workdir/Common Collections/Options/Optional Value)
[INFO] [stderr]     Checking result1 v0.1.0 (/opt/rustwide/workdir/Error Handling/Errors Primer/Positive Nonzero Integer)
[INFO] [stderr]     Checking use_option v0.1.0 (/opt/rustwide/workdir/Common Collections/Options/Use Option)
[INFO] [stderr]     Checking iterators4 v0.1.0 (/opt/rustwide/workdir/Standard Library Types/Iterators/Factorial)
[INFO] [stderr]     Checking quote v1.0.35
[INFO] [stderr]    Compiling syn v2.0.48
[INFO] [stderr]     Checking getrandom v0.2.12
[INFO] [stderr]     Checking rand_core v0.6.4
[INFO] [stderr]     Checking rand_chacha v0.3.1
[INFO] [stderr]     Checking checking_for_panics_with_should_panic_ v0.1.0 (/opt/rustwide/workdir/Writing Automated Tests/How to Write Tests/Checking for Panics with should_panic)
[INFO] [stderr]     Checking task9 v0.1.0 (/opt/rustwide/workdir/Understanding Ownership/References and Borrowing/Reference Order)
[INFO] [stdout] warning: field `value` is never read
[INFO] [stdout]  --> Writing Automated Tests/How to Write Tests/Checking for Panics with should_panic/src/lib.rs:2:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | pub struct Guess {
[INFO] [stdout]   |            ----- field in this struct
[INFO] [stdout] 2 |     value: i32,
[INFO] [stdout]   |     ^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Checking creating_multiple_producers_by_cloning_the_transmitter v0.1.0 (/opt/rustwide/workdir/Fearless Concurrency/Using Message Passing to Transfer Data Between Threads/Creating Multiple Producers by Cloning the Transmitter)
[INFO] [stderr]     Checking course_view v0.1.0 (/opt/rustwide/workdir/Introduction/Getting started/Course View)
[INFO] [stderr]     Checking generics_in_vec v0.1.0 (/opt/rustwide/workdir/Generic Types, Traits, and Lifetime/Generic Data Types/Generics in Vec)
[INFO] [stdout] warning: unused variable: `shopping_list`
[INFO] [stdout]  --> Generic Types, Traits, and Lifetime/Generic Data Types/Generics in Vec/src/main.rs:2:9
[INFO] [stdout]   |
[INFO] [stdout] 2 |     let shopping_list: Vec<&str> = vec!["milk"];
[INFO] [stdout]   |         ^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_shopping_list`
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Checking code_without_duplications v0.1.0 (/opt/rustwide/workdir/Generic Types, Traits, and Lifetime/Intro/Code without Duplications)
[INFO] [stderr]     Checking arrays v0.1.0 (/opt/rustwide/workdir/Common Programming Concepts/Tuples and Arrays/Create an Array)
[INFO] [stderr]     Checking rand v0.8.5
[INFO] [stderr]     Checking defining_an_enum v0.1.0 (/opt/rustwide/workdir/Structs, Methods, Enums, and Pattern Matching/Enums/Defining an Enum)
[INFO] [stderr]     Checking lifetime_syntax v0.1.0 (/opt/rustwide/workdir/Generic Types, Traits, and Lifetime/Lifetimes/Intro)
[INFO] [stderr]     Checking modules3 v0.1.0 (/opt/rustwide/workdir/Modules/Modules/Time To Check Time)
[INFO] [stderr]     Checking basic_datatypes_intro v0.1.0 (/opt/rustwide/workdir/Common Programming Concepts/Basic Data Types/Intro)
[INFO] [stdout] warning: unused variable: `ip_kind`
[INFO] [stdout]  --> Structs, Methods, Enums, and Pattern Matching/Enums/Defining an Enum/src/main.rs:6:10
[INFO] [stdout]   |
[INFO] [stdout] 6 | fn route(ip_kind: IpAddrKind) {}
[INFO] [stdout]   |          ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_ip_kind`
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Checking option3 v0.1.0 (/opt/rustwide/workdir/Generic Types, Traits, and Lifetime/Lifetimes/Pattern Binding)
[INFO] [stderr]     Checking re_exporting_names_with_pub_use v0.1.0 (/opt/rustwide/workdir/Modules/Modules/Re-exporting Names with pub use)
[INFO] [stderr]     Checking summary_macros v0.1.0 (/opt/rustwide/workdir/Macros/Procedural Macros/Summary)
[INFO] [stderr]     Checking generic_lifetimes_in_functions v0.1.0 (/opt/rustwide/workdir/Generic Types, Traits, and Lifetime/Lifetimes/Generic Lifetimes in Functions)
[INFO] [stderr]     Checking test_organization v0.1.0 (/opt/rustwide/workdir/Writing Automated Tests/Running and Organizing Tests/Test Organization)
[INFO] [stderr]     Checking dangling_references v0.1.0 (/opt/rustwide/workdir/Understanding Ownership/References and Borrowing/Dangling References)
[INFO] [stdout] warning: path statement with no effect
[INFO] [stdout]   --> Generic Types, Traits, and Lifetime/Lifetimes/Pattern Binding/src/main.rs:13:5
[INFO] [stdout]    |
[INFO] [stdout] 13 |     y; // Fix without deleting this line.
[INFO] [stdout]    |     ^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(path_statements)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0106]: missing lifetime specifier
[INFO] [stdout]  --> Understanding Ownership/References and Borrowing/Dangling References/src/main.rs:6:16
[INFO] [stdout]   |
[INFO] [stdout] 6 | fn dangle() -> &String {
[INFO] [stdout]   |                ^ expected named lifetime parameter
[INFO] [stdout]   |
[INFO] [stdout]   = help: this function's return type contains a borrowed value, but there is no value for it to be borrowed from
[INFO] [stdout] help: consider using the `'static` lifetime, but this is uncommon unless you're returning a borrowed value from a `const` or a `static`
[INFO] [stdout]   |
[INFO] [stdout] 6 | fn dangle() -> &'static String {
[INFO] [stdout]   |                 +++++++
[INFO] [stdout] help: instead, you are more likely to want to return an owned value
[INFO] [stdout]   |
[INFO] [stdout] 6 - fn dangle() -> &String {
[INFO] [stdout] 6 + fn dangle() -> String {
[INFO] [stdout]   |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0106`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `dangling_references` (bin "dangling_references") due to 1 previous error
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] running `Command { std: "docker" "inspect" "7a2186a710a57cabea7a4e52de5aa414ab0469ce955273e01528e4df21a2b793", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "7a2186a710a57cabea7a4e52de5aa414ab0469ce955273e01528e4df21a2b793", kill_on_drop: false }`
[INFO] [stdout] 7a2186a710a57cabea7a4e52de5aa414ab0469ce955273e01528e4df21a2b793