[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#5de9e0e6cf775e94e0de2003f35e183f3f77bfe8 for pr-143808
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fsteephengeorge%2Frustlings" "/workspace/builds/worker-3-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-3-tc2/source'...
[INFO] [stderr] done.
[INFO] removed /workspace/builds/worker-3-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-3-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/steephengeorge/rustlings on toolchain 5de9e0e6cf775e94e0de2003f35e183f3f77bfe8
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+5de9e0e6cf775e94e0de2003f35e183f3f77bfe8" "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" "+5de9e0e6cf775e94e0de2003f35e183f3f77bfe8" "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] [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 steephengeorge/rustlings against try#5de9e0e6cf775e94e0de2003f35e183f3f77bfe8 for pr-143808
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fsteephengeorge%2Frustlings" "/workspace/builds/worker-3-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-3-tc2/source'...
[INFO] [stderr] done.
[INFO] removed /workspace/builds/worker-3-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-3-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/steephengeorge/rustlings on toolchain 5de9e0e6cf775e94e0de2003f35e183f3f77bfe8
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+5de9e0e6cf775e94e0de2003f35e183f3f77bfe8" "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" "+5de9e0e6cf775e94e0de2003f35e183f3f77bfe8" "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] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded escargot v0.5.8
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-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:cf8efcab8866f2cf4285301c7418e2f4f2a9b088c91ba69c40d5b659f81557f7" "/opt/rustwide/cargo-home/bin/cargo" "+5de9e0e6cf775e94e0de2003f35e183f3f77bfe8" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] c9c3dc5383bc6d3d2d5ae7b192054876cbc710fcc6045e172151d2a856b440d2
[INFO] running `Command { std: "docker" "start" "-a" "c9c3dc5383bc6d3d2d5ae7b192054876cbc710fcc6045e172151d2a856b440d2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "c9c3dc5383bc6d3d2d5ae7b192054876cbc710fcc6045e172151d2a856b440d2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c9c3dc5383bc6d3d2d5ae7b192054876cbc710fcc6045e172151d2a856b440d2", kill_on_drop: false }`
[INFO] [stdout] c9c3dc5383bc6d3d2d5ae7b192054876cbc710fcc6045e172151d2a856b440d2
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-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:cf8efcab8866f2cf4285301c7418e2f4f2a9b088c91ba69c40d5b659f81557f7" "/opt/rustwide/cargo-home/bin/cargo" "+5de9e0e6cf775e94e0de2003f35e183f3f77bfe8" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] c827977ee453da19df91e0f936fb30b18eb5ceaa040b9e6476933dac41becb9e
[INFO] running `Command { std: "docker" "start" "-a" "c827977ee453da19df91e0f936fb30b18eb5ceaa040b9e6476933dac41becb9e", 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 unicode-ident v1.0.12
[INFO] [stderr]    Compiling serde v1.0.196
[INFO] [stderr]    Compiling serde_json v1.0.113
[INFO] [stderr]     Checking ryu v1.0.16
[INFO] [stderr]     Checking itoa v1.0.10
[INFO] [stderr]    Compiling escargot v0.5.8
[INFO] [stderr]     Checking once_cell v1.19.0
[INFO] [stderr]     Checking log v0.4.20
[INFO] [stderr]    Compiling syn v1.0.109
[INFO] [stderr]    Compiling libc v0.2.152
[INFO] [stderr]     Checking cfg-if v1.0.0
[INFO] [stderr]     Checking ppv-lite86 v0.2.17
[INFO] [stderr]     Checking hello_macro v0.1.0 (/opt/rustwide/workdir/Macros/Procedural Macros/hello_macro)
[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 errors6 v0.1.0 (/opt/rustwide/workdir/Error Handling/Errors Primer/Custom Errors)
[INFO] [stderr]     Checking capitalize_first v0.1.0 (/opt/rustwide/workdir/Standard Library Types/Iterators/Capitalize first)
[INFO] [stderr]     Checking string_trait v0.1.0 (/opt/rustwide/workdir/Generic Types, Traits, and Lifetime/Traits/String 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 from_into v0.1.0 (/opt/rustwide/workdir/Standard Library Types/Type Conversions/From Into)
[INFO] [stderr]     Checking errors5 v0.1.0 (/opt/rustwide/workdir/Error Handling/Errors Primer/Multiple Errors)
[INFO] [stderr]     Checking process_some_strings v0.1.0 (/opt/rustwide/workdir/Common Collections/Strings/Process Some Strings)
[INFO] [stderr]     Checking combine_traits v0.1.0 (/opt/rustwide/workdir/Generic Types, Traits, and Lifetime/Traits/Combine Traits)
[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 fromstr v0.1.0 (/opt/rustwide/workdir/Standard Library Types/Type Conversions/FromStr)
[INFO] [stderr]     Checking using_as v0.1.0 (/opt/rustwide/workdir/Standard Library Types/Type Conversions/Using As)
[INFO] [stderr]     Checking license_it v0.1.0 (/opt/rustwide/workdir/Generic Types, Traits, and Lifetime/Traits/License It)
[INFO] [stderr]     Checking compare_licenses v0.1.0 (/opt/rustwide/workdir/Generic Types, Traits, and Lifetime/Traits/Compare Licenses)
[INFO] [stderr]     Checking asref_and_asmut v0.1.0 (/opt/rustwide/workdir/Standard Library Types/Type Conversions/AsRef and AsMut)
[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] [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] [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] [stderr]     Checking add_conditions v0.1.0 (/opt/rustwide/workdir/Common Programming Concepts/Conditions/Add Conditions)
[INFO] [stderr]     Checking advanced_errors_2 v0.1.0 (/opt/rustwide/workdir/Error Handling/Errors Primer/Advanced Errors 2)
[INFO] [stderr]     Checking loop_over_a_vector v0.1.0 (/opt/rustwide/workdir/Common Collections/Vectors/Loop Over a Vector)
[INFO] [stderr]     Checking count_progress v0.1.0 (/opt/rustwide/workdir/Standard Library Types/Iterators/Count Progress)
[INFO] [stderr]     Checking trim_a_string v0.1.0 (/opt/rustwide/workdir/Understanding Ownership/The Slice Type/Trim a String)
[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 modifying_a_hashmap v0.1.0 (/opt/rustwide/workdir/Common Collections/Hashmaps/More Fruits)
[INFO] [stderr]     Checking declaring_a_hashmap v0.1.0 (/opt/rustwide/workdir/Common Collections/Hashmaps/Fruits Delivery)
[INFO] [stderr]     Checking count_typed_cells v0.1.0 (/opt/rustwide/workdir/Common Collections/Vectors/Count Typed Cells)
[INFO] [stderr]     Checking vec_trait v0.1.0 (/opt/rustwide/workdir/Generic Types, Traits, and Lifetime/Traits/Vec Trait)
[INFO] [stderr]     Checking lamp_with_switchers v0.1.0 (/opt/rustwide/workdir/Standard Library Types/Smart Pointers/Switch the Lamp)
[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 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] [stderr]     Checking use_cow v0.1.0 (/opt/rustwide/workdir/Standard Library Types/Smart Pointers/Use Cow)
[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 workers_in_the_engine v0.1.0 (/opt/rustwide/workdir/Standard Library Types/Smart Pointers/Workers in the Engine)
[INFO] [stderr]     Checking home_alone v0.1.0 (/opt/rustwide/workdir/Modules/Modules/Home Alone at Day X)
[INFO] [stderr]     Checking iterator3 v0.1.0 (/opt/rustwide/workdir/Standard Library Types/Iterators/Iterator)
[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 returning_result v0.1.0 (/opt/rustwide/workdir/Error Handling/Error Handling/Returning Result)
[INFO] [stderr]     Checking integration_tests v0.1.0 (/opt/rustwide/workdir/Writing Automated Tests/Running and Organizing Tests/Integration Tests)
[INFO] [stderr]     Checking iterators4 v0.1.0 (/opt/rustwide/workdir/Standard Library Types/Iterators/Factorial)
[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 calculate_price v0.1.0 (/opt/rustwide/workdir/Common Programming Concepts/Variables, Functions, and Conditions Test/Calculate Price)
[INFO] [stderr]     Checking use_option v0.1.0 (/opt/rustwide/workdir/Common Collections/Options/Use Option)
[INFO] [stderr]     Checking matching_result v0.1.0 (/opt/rustwide/workdir/Error Handling/Error Handling/Matching Result)
[INFO] [stderr]     Checking result1 v0.1.0 (/opt/rustwide/workdir/Error Handling/Errors Primer/Positive Nonzero Integer)
[INFO] [stderr]     Checking submodules v0.1.0 (/opt/rustwide/workdir/Writing Automated Tests/Running and Organizing Tests/Submodules in Integration Tests)
[INFO] [stderr]     Checking quote v1.0.35
[INFO] [stderr]     Checking defining_a_function v0.1.0 (/opt/rustwide/workdir/Common Programming Concepts/Functions/Defining a Function)
[INFO] [stderr]     Checking calling_methods_without_default_implementations v0.1.0 (/opt/rustwide/workdir/Generic Types, Traits, and Lifetime/Traits/Calling Methods Without Default Implementations)
[INFO] [stderr]     Checking summary_tests v0.1.0 (/opt/rustwide/workdir/Writing Automated Tests/Running and Organizing Tests/Summary)
[INFO] [stderr]     Checking the_static_lifetime v0.1.0 (/opt/rustwide/workdir/Generic Types, Traits, and Lifetime/Lifetimes/The Static Lifetime)
[INFO] [stderr]     Checking macro_arms v0.1.0 (/opt/rustwide/workdir/Macros/Declarative Macros/Macro Arms)
[INFO] [stderr]     Checking running_tests v0.1.0 (/opt/rustwide/workdir/Writing Automated Tests/Running and Organizing Tests/Running Tests)
[INFO] [stderr]     Checking compound_types v0.1.0 (/opt/rustwide/workdir/Common Programming Concepts/Tuples and Arrays/The Array Type)
[INFO] [stderr]     Checking repetition_with_loops v0.1.0 (/opt/rustwide/workdir/Common Programming Concepts/Repetitions/Repetition with Loops)
[INFO] [stderr]     Checking check_clippy_for_option v0.1.0 (/opt/rustwide/workdir/Common Collections/Options/Check Clippy for Option)
[INFO] [stdout] warning: unused variable: `s`
[INFO] [stdout]  --> Generic Types, Traits, and Lifetime/Lifetimes/The Static Lifetime/src/main.rs:2:9
[INFO] [stdout]   |
[INFO] [stdout] 2 |     let s: &'static str = "I have a static lifetime.";
[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] [stderr]     Checking the_anatomy_of_a_test_function v0.1.0 (/opt/rustwide/workdir/Writing Automated Tests/How to Write Tests/The Anatomy of a Test Function)
[INFO] [stderr]     Checking matches_are_exhaustive v0.1.0 (/opt/rustwide/workdir/Structs, Methods, Enums, and Pattern Matching/Pattern Matching/Matches Are Exhaustive)
[INFO] [stderr]     Checking dropping_a_vector_drops_its_elements v0.1.0 (/opt/rustwide/workdir/Common Collections/Vectors/Dropping a Vector Drops Its Elements)
[INFO] [stderr]     Checking associated_functions v0.1.0 (/opt/rustwide/workdir/Structs, Methods, Enums, and Pattern Matching/Structs with Methods/Associated Functions and Multiple impl Blocks)
[INFO] [stderr]     Checking other_slices v0.1.0 (/opt/rustwide/workdir/Understanding Ownership/The Slice Type/Other Slices)
[INFO] [stderr]     Checking traits v0.1.0 (/opt/rustwide/workdir/Generic Types, Traits, and Lifetime/Traits/Traits)
[INFO] [stderr]     Checking using_message_passing_to_transfer_data_between_threads v0.1.0 (/opt/rustwide/workdir/Fearless Concurrency/Using Message Passing to Transfer Data Between Threads/Intro)
[INFO] [stdout] warning: unused variable: `first`
[INFO] [stdout]  --> Common Programming Concepts/Tuples and Arrays/The Array Type/src/main.rs:4:9
[INFO] [stdout]   |
[INFO] [stdout] 4 |     let first = a[0];
[INFO] [stdout]   |         ^^^^^ help: if this is intentional, prefix it with an underscore: `_first`
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `second`
[INFO] [stdout]  --> Common Programming Concepts/Tuples and Arrays/The Array Type/src/main.rs:5:9
[INFO] [stdout]   |
[INFO] [stdout] 5 |     let second = a[1];
[INFO] [stdout]   |         ^^^^^^ help: if this is intentional, prefix it with an underscore: `_second`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `first`
[INFO] [stdout]  --> Common Programming Concepts/Tuples and Arrays/The Array Type/src/main.rs:4:9
[INFO] [stdout]   |
[INFO] [stdout] 4 |     let first = a[0];
[INFO] [stdout]   |         ^^^^^ help: if this is intentional, prefix it with an underscore: `_first`
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `second`
[INFO] [stdout]  --> Common Programming Concepts/Tuples and Arrays/The Array Type/src/main.rs:5:9
[INFO] [stdout]   |
[INFO] [stdout] 5 |     let second = a[1];
[INFO] [stdout]   |         ^^^^^^ help: if this is intentional, prefix it with an underscore: `_second`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `plus_one` is never used
[INFO] [stdout]  --> Structs, Methods, Enums, and Pattern Matching/Pattern Matching/Matches Are Exhaustive/src/main.rs:1:4
[INFO] [stdout]   |
[INFO] [stdout] 1 | fn plus_one(x: Option<i32>) -> Option<i32> {
[INFO] [stdout]   |    ^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Checking variables6 v0.1.0 (/opt/rustwide/workdir/Common Programming Concepts/Variables/Constant Type)
[INFO] [stderr]     Checking testing_equality_with_the_assert_eq_and_assert_ne_macros v0.1.0 (/opt/rustwide/workdir/Writing Automated Tests/How to Write Tests/Testing Equality with the assert_eq and assert_ne Macros)
[INFO] [stdout] warning: unused variable: `v`
[INFO] [stdout]  --> Common Collections/Vectors/Dropping a Vector Drops Its Elements/src/main.rs:3:13
[INFO] [stdout]   |
[INFO] [stdout] 3 |         let v = vec![1, 2, 3, 4];
[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 mutable_references v0.1.0 (/opt/rustwide/workdir/Understanding Ownership/References and Borrowing/Mutable References)
[INFO] [stderr]     Checking hash_maps_and_ownership v0.1.0 (/opt/rustwide/workdir/Common Collections/Hashmaps/Hash Maps and Ownership)
[INFO] [stderr]     Checking summary_macros v0.1.0 (/opt/rustwide/workdir/Macros/Procedural Macros/Summary)
[INFO] [stderr]     Checking who_owns_the_ring_of_power v0.1.0 (/opt/rustwide/workdir/Understanding Ownership/What is ownership/Who Owns the One Ring)
[INFO] [stderr]     Checking attribute_like_macros v0.1.0 (/opt/rustwide/workdir/Macros/Procedural Macros/Attribute-like macros)
[INFO] [stderr]     Checking a_shortcut_for_propagating_errors v0.1.0 (/opt/rustwide/workdir/Error Handling/Error Handling/A Shortcut for Propagating Errors)
[INFO] [stderr]     Checking intro_sp v0.1.0 (/opt/rustwide/workdir/Standard Library Types/Smart Pointers/Intro)
[INFO] [stderr]     Checking matching_with_option v0.1.0 (/opt/rustwide/workdir/Structs, Methods, Enums, and Pattern Matching/Pattern Matching/Matching with Option)
[INFO] [stderr]    Compiling syn v2.0.48
[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] [stderr]     Checking default_implementations v0.1.0 (/opt/rustwide/workdir/Generic Types, Traits, and Lifetime/Traits/Default Implementations)
[INFO] [stderr]     Checking code_without_duplications v0.1.0 (/opt/rustwide/workdir/Generic Types, Traits, and Lifetime/Intro/Code without Duplications)
[INFO] [stderr]     Checking the_tuple_type v0.1.0 (/opt/rustwide/workdir/Common Programming Concepts/Tuples and Arrays/The Tuple Type)
[INFO] [stdout] warning: unused variable: `six`
[INFO] [stdout]   --> Structs, Methods, Enums, and Pattern Matching/Pattern Matching/Matching with Option/src/main.rs:10:9
[INFO] [stdout]    |
[INFO] [stdout] 10 |     let six = plus_one(five);
[INFO] [stdout]    |         ^^^ help: if this is intentional, prefix it with an underscore: `_six`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `none`
[INFO] [stdout]   --> Structs, Methods, Enums, and Pattern Matching/Pattern Matching/Matching with Option/src/main.rs:11:9
[INFO] [stdout]    |
[INFO] [stdout] 11 |     let none = plus_one(None);
[INFO] [stdout]    |         ^^^^ help: if this is intentional, prefix it with an underscore: `_none`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `read_username_from_file` is never used
[INFO] [stdout]  --> Error Handling/Error Handling/A Shortcut for Propagating Errors/src/main.rs:5:4
[INFO] [stdout]   |
[INFO] [stdout] 5 | fn read_username_from_file() -> Result<String, io::Error> {
[INFO] [stdout]   |    ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `read_username_from_file_2` is never used
[INFO] [stdout]   --> Error Handling/Error Handling/A Shortcut for Propagating Errors/src/main.rs:12:4
[INFO] [stdout]    |
[INFO] [stdout] 12 | fn read_username_from_file_2() -> Result<String, io::Error> {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Checking using_if_in_a_let_statement_ v0.1.0 (/opt/rustwide/workdir/Common Programming Concepts/Conditions/Using if in a let Statement)
[INFO] [stdout] warning: function `read_username_from_file_3` is never used
[INFO] [stdout]   --> Error Handling/Error Handling/A Shortcut for Propagating Errors/src/main.rs:20:4
[INFO] [stdout]    |
[INFO] [stdout] 20 | fn read_username_from_file_3() -> Result<String, io::Error> {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Checking ManagingConditions v0.1.0 (/opt/rustwide/workdir/Common Programming Concepts/Conditions/Managing Conditions)
[INFO] [stderr]     Checking making_structs_and_enums_public v0.1.0 (/opt/rustwide/workdir/Modules/Modules/Making Structs and Enums Public)
[INFO] [stderr]     Checking the_slice_type v0.1.0 (/opt/rustwide/workdir/Understanding Ownership/The Slice Type/Intro)
[INFO] [stderr]     Checking variables1 v0.1.0 (/opt/rustwide/workdir/Common Programming Concepts/Variables/New Variable Binding)
[INFO] [stderr]     Checking generic_data_types v0.1.0 (/opt/rustwide/workdir/Generic Types, Traits, and Lifetime/Generic Data Types/In Function Definitions)
[INFO] [stderr]     Checking generic_lifetimes_in_functions v0.1.0 (/opt/rustwide/workdir/Generic Types, Traits, and Lifetime/Lifetimes/Generic Lifetimes in Functions)
[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] [stdout] warning: unused variable: `x`
[INFO] [stdout]  --> Common Programming Concepts/Tuples and Arrays/The Tuple Type/src/main.rs:4:10
[INFO] [stdout]   |
[INFO] [stdout] 4 |     let (x, y, z) = tup;
[INFO] [stdout]   |          ^ help: if this is intentional, prefix it with an underscore: `_x`
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `z`
[INFO] [stdout]  --> Common Programming Concepts/Tuples and Arrays/The Tuple Type/src/main.rs:4:16
[INFO] [stdout]   |
[INFO] [stdout] 4 |     let (x, y, z) = tup;
[INFO] [stdout]   |                ^ help: if this is intentional, prefix it with an underscore: `_z`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Checking lifetime_syntax v0.1.0 (/opt/rustwide/workdir/Generic Types, Traits, and Lifetime/Lifetimes/Intro)
[INFO] [stdout] warning: unused variable: `order1`
[INFO] [stdout]   --> Modules/Modules/Making Structs and Enums Public/src/lib.rs:33:9
[INFO] [stdout]    |
[INFO] [stdout] 33 |     let order1 = back_of_house::Appetizer::Soup;
[INFO] [stdout]    |         ^^^^^^ help: if this is intentional, prefix it with an underscore: `_order1`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `order2`
[INFO] [stdout]   --> Modules/Modules/Making Structs and Enums Public/src/lib.rs:34:9
[INFO] [stdout]    |
[INFO] [stdout] 34 |     let order2 = back_of_house::Appetizer::Salad;
[INFO] [stdout]    |         ^^^^^^ help: if this is intentional, prefix it with an underscore: `_order2`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Checking procedural_macros_for_generating_code_from_attributes v0.1.0 (/opt/rustwide/workdir/Macros/Procedural Macros/Procedural Macros for Generating Code from Attributes)
[INFO] [stderr]     Checking summary_match v0.1.0 (/opt/rustwide/workdir/Structs, Methods, Enums, and Pattern Matching/Pattern Matching/Summary)
[INFO] [stderr]     Checking generics_in_vec v0.1.0 (/opt/rustwide/workdir/Generic Types, Traits, and Lifetime/Generic Data Types/Generics in Vec)
[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 duplicated_code_fragments v0.1.0 (/opt/rustwide/workdir/Generic Types, Traits, and Lifetime/Intro/Duplicated Code Fragments)
[INFO] [stderr]     Checking preventing_dangling_references_with_lifetimes_ v0.1.0 (/opt/rustwide/workdir/Generic Types, Traits, and Lifetime/Lifetimes/Preventing Dangling References with Lifetimes)
[INFO] [stdout] error[E0369]: binary operation `>` cannot be applied to type `&T`
[INFO] [stdout]  --> Generic Types, Traits, and Lifetime/Generic Data Types/In Function Definitions/src/main.rs:5:17
[INFO] [stdout]   |
[INFO] [stdout] 5 |         if item > largest { // !!! ERROR
[INFO] [stdout]   |            ---- ^ ------- &T
[INFO] [stdout]   |            |
[INFO] [stdout]   |            &T
[INFO] [stdout]   |
[INFO] [stdout] help: consider restricting type parameter `T` with trait `PartialOrd`
[INFO] [stdout]   |
[INFO] [stdout] 1 | fn largest<T: std::cmp::PartialOrd>(list: &[T]) -> &T {
[INFO] [stdout]   |             ++++++++++++++++++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `word`
[INFO] [stdout]  --> Understanding Ownership/The Slice Type/Intro/src/main.rs:4:9
[INFO] [stdout]   |
[INFO] [stdout] 4 |     let word = first_word(&s); // word will get the value 5
[INFO] [stdout]   |         ^^^^ help: if this is intentional, prefix it with an underscore: `_word`
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Checking propagating_errors v0.1.0 (/opt/rustwide/workdir/Error Handling/Error Handling/Propagating Errors)
[INFO] [stdout] For more information about this error, try `rustc --explain E0369`.
[INFO] [stdout] 
[INFO] [stderr]     Checking fixing_the_largest_function_with_trait_bounds v0.1.0 (/opt/rustwide/workdir/Generic Types, Traits, and Lifetime/Traits/Fixing the largest Function with Trait Bounds)
[INFO] [stderr] error: could not compile `generic_data_types` (bin "generic_data_types" test) due to 1 previous error
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[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] [stdout] error[E0597]: `x` does not live long enough
[INFO] [stdout]   --> Generic Types, Traits, and Lifetime/Lifetimes/Preventing Dangling References with Lifetimes/src/main.rs:7:17
[INFO] [stdout]    |
[INFO] [stdout] 6  |             let x = 5;
[INFO] [stdout]    |                 - binding `x` declared here
[INFO] [stdout] 7  |             r = &x; // !!! ERROR: `x` does not live long enough
[INFO] [stdout]    |                 ^^ borrowed value does not live long enough
[INFO] [stdout] 8  |         }
[INFO] [stdout]    |         - `x` dropped here while still borrowed
[INFO] [stdout] 9  |
[INFO] [stdout] 10 |         println!("r: {}", r);
[INFO] [stdout]    |                           - borrow later used here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0597`.
[INFO] [stdout] 
[INFO] [stdout] warning: function `read_username_from_file` is never used
[INFO] [stdout]  --> Error Handling/Error Handling/Propagating Errors/src/main.rs:5:4
[INFO] [stdout]   |
[INFO] [stdout] 5 | fn read_username_from_file() -> Result<String, io::Error> {
[INFO] [stdout]   |    ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `preventing_dangling_references_with_lifetimes_` (bin "preventing_dangling_references_with_lifetimes_" test) due to 1 previous error
[INFO] running `Command { std: "docker" "inspect" "c827977ee453da19df91e0f936fb30b18eb5ceaa040b9e6476933dac41becb9e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c827977ee453da19df91e0f936fb30b18eb5ceaa040b9e6476933dac41becb9e", kill_on_drop: false }`
[INFO] [stdout] c827977ee453da19df91e0f936fb30b18eb5ceaa040b9e6476933dac41becb9e