[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 master#af4a5a13a15fa0c60e06321077ef452f769b42fd for pr-122960-3 [INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fsteephengeorge%2Frustlings" "/workspace/builds/worker-0-tc1/source", kill_on_drop: false }` [INFO] [stderr] Cloning into '/workspace/builds/worker-0-tc1/source'... [INFO] [stderr] done. [INFO] validating manifest of git repo https://github.com/steephengeorge/rustlings on toolchain af4a5a13a15fa0c60e06321077ef452f769b42fd [INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+af4a5a13a15fa0c60e06321077ef452f769b42fd" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }` [INFO] removed /workspace/builds/worker-0-tc1/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-0-tc1/source/Cargo.toml [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" "+af4a5a13a15fa0c60e06321077ef452f769b42fd" "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] Downloading crates ... [INFO] [stderr] Downloaded escargot v0.5.8 [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+af4a5a13a15fa0c60e06321077ef452f769b42fd" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }` [INFO] [stdout] f9669f6ba94c1925a6f46cb2f6075bc289371eda3a08f58b5cc50a736e94e567 [INFO] running `Command { std: "docker" "start" "-a" "f9669f6ba94c1925a6f46cb2f6075bc289371eda3a08f58b5cc50a736e94e567", kill_on_drop: false }` [INFO] running `Command { std: "docker" "inspect" "f9669f6ba94c1925a6f46cb2f6075bc289371eda3a08f58b5cc50a736e94e567", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "f9669f6ba94c1925a6f46cb2f6075bc289371eda3a08f58b5cc50a736e94e567", kill_on_drop: false }` [INFO] [stdout] f9669f6ba94c1925a6f46cb2f6075bc289371eda3a08f58b5cc50a736e94e567 [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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_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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+af4a5a13a15fa0c60e06321077ef452f769b42fd" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }` [INFO] [stdout] 355ec8432f62949dfa357de20b3430268e24388f233990b7107707cbc7a80703 [INFO] running `Command { std: "docker" "start" "-a" "355ec8432f62949dfa357de20b3430268e24388f233990b7107707cbc7a80703", 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] Compiling escargot v0.5.8 [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 errors5 v0.1.0 (/opt/rustwide/workdir/Error Handling/Errors Primer/Multiple Errors) [INFO] [stderr] Checking advanced_errors_2 v0.1.0 (/opt/rustwide/workdir/Error Handling/Errors Primer/Advanced Errors 2) [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 add_conditions v0.1.0 (/opt/rustwide/workdir/Common Programming Concepts/Conditions/Add Conditions) [INFO] [stderr] Checking count_progress v0.1.0 (/opt/rustwide/workdir/Standard Library Types/Iterators/Count Progress) [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 combine_traits v0.1.0 (/opt/rustwide/workdir/Generic Types, Traits, and Lifetime/Traits/Combine Traits) [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 declaring_a_vector v0.1.0 (/opt/rustwide/workdir/Common Collections/Vectors/Create a Vector on Your Own) [INFO] [stderr] Checking errors6 v0.1.0 (/opt/rustwide/workdir/Error Handling/Errors Primer/Custom Errors) [INFO] [stderr] Checking count_typed_cells v0.1.0 (/opt/rustwide/workdir/Common Collections/Vectors/Count Typed Cells) [INFO] [stderr] Checking lamp_with_switchers v0.1.0 (/opt/rustwide/workdir/Standard Library Types/Smart Pointers/Switch the Lamp) [INFO] [stderr] Checking generics_in_structs v0.1.0 (/opt/rustwide/workdir/Generic Types, Traits, and Lifetime/Generic Data Types/Generics in Structs) [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] | ^ [INFO] [stdout] | [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] [stderr] Checking process_some_strings v0.1.0 (/opt/rustwide/workdir/Common Collections/Strings/Process Some Strings) [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 license_it v0.1.0 (/opt/rustwide/workdir/Generic Types, Traits, and Lifetime/Traits/License It) [INFO] [stdout] warning: 4 warnings emitted [INFO] [stdout] [INFO] [stdout] [INFO] [stderr] Checking fromstr v0.1.0 (/opt/rustwide/workdir/Standard Library Types/Type Conversions/FromStr) [INFO] [stderr] Checking string_transformer v0.1.0 (/opt/rustwide/workdir/Common Collections/Strings/String Transformer) [INFO] [stderr] Checking advanced_errors v0.1.0 (/opt/rustwide/workdir/Error Handling/Errors Primer/Advanced Errors) [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 asref_and_asmut v0.1.0 (/opt/rustwide/workdir/Standard Library Types/Type Conversions/AsRef and AsMut) [INFO] [stderr] Checking loop_over_a_vector v0.1.0 (/opt/rustwide/workdir/Common Collections/Vectors/Loop Over a Vector) [INFO] [stdout] warning: 1 warning emitted [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 box_task v0.1.0 (/opt/rustwide/workdir/Standard Library Types/Smart Pointers/Box Task) [INFO] [stderr] Checking from_into v0.1.0 (/opt/rustwide/workdir/Standard Library Types/Type Conversions/From Into) [INFO] [stderr] Checking modifying_a_hashmap v0.1.0 (/opt/rustwide/workdir/Common Collections/Hashmaps/More Fruits) [INFO] [stderr] Checking string_trait v0.1.0 (/opt/rustwide/workdir/Generic Types, Traits, and Lifetime/Traits/String Trait) [INFO] [stderr] Checking build_team_scores_table v0.1.0 (/opt/rustwide/workdir/Common Collections/Hashmaps/Build Scores Table) [INFO] [stdout] warning: 1 warning emitted [INFO] [stdout] [INFO] [stdout] [INFO] [stderr] Checking capitalize_first v0.1.0 (/opt/rustwide/workdir/Standard Library Types/Iterators/Capitalize first) [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 vec_trait v0.1.0 (/opt/rustwide/workdir/Generic Types, Traits, and Lifetime/Traits/Vec Trait) [INFO] [stderr] Checking using_as v0.1.0 (/opt/rustwide/workdir/Standard Library Types/Type Conversions/Using As) [INFO] [stderr] Checking try_from_into v0.1.0 (/opt/rustwide/workdir/Standard Library Types/Type Conversions/Try From Into) [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 home_alone v0.1.0 (/opt/rustwide/workdir/Modules/Modules/Home Alone at Day X) [INFO] [stderr] Checking if_task v0.1.0 (/opt/rustwide/workdir/Common Programming Concepts/Conditions/If Task) [INFO] [stdout] warning: the item `TryFrom` is imported redundantly [INFO] [stdout] --> Standard Library Types/Type Conversions/Try From Into/src/lib.rs:1:20 [INFO] [stdout] | [INFO] [stdout] 1 | use std::convert::{TryFrom, TryInto}; [INFO] [stdout] | ^^^^^^^ [INFO] [stdout] --> /rustc/af4a5a13a15fa0c60e06321077ef452f769b42fd/library/std/src/prelude/mod.rs:148:13 [INFO] [stdout] | [INFO] [stdout] = note: the item `TryFrom` is already defined here [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_imports)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: the item `TryInto` is imported redundantly [INFO] [stdout] --> Standard Library Types/Type Conversions/Try From Into/src/lib.rs:1:29 [INFO] [stdout] | [INFO] [stdout] 1 | use std::convert::{TryFrom, TryInto}; [INFO] [stdout] | ^^^^^^^ [INFO] [stdout] --> /rustc/af4a5a13a15fa0c60e06321077ef452f769b42fd/library/std/src/prelude/mod.rs:148:13 [INFO] [stdout] | [INFO] [stdout] = note: the item `TryInto` is already defined here [INFO] [stdout] [INFO] [stdout] [INFO] [stderr] Checking use_option v0.1.0 (/opt/rustwide/workdir/Common Collections/Options/Use Option) [INFO] [stderr] Checking returning_result v0.1.0 (/opt/rustwide/workdir/Error Handling/Error Handling/Returning Result) [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 integration_tests v0.1.0 (/opt/rustwide/workdir/Writing Automated Tests/Running and Organizing Tests/Integration Tests) [INFO] [stderr] Checking optional_value v0.1.0 (/opt/rustwide/workdir/Common Collections/Options/Optional Value) [INFO] [stdout] warning: 2 warnings emitted [INFO] [stdout] [INFO] [stdout] [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 iterators4 v0.1.0 (/opt/rustwide/workdir/Standard Library Types/Iterators/Factorial) [INFO] [stderr] Checking calculate_price v0.1.0 (/opt/rustwide/workdir/Common Programming Concepts/Variables, Functions, and Conditions Test/Calculate Price) [INFO] [stderr] Checking times_two_tests v0.1.0 (/opt/rustwide/workdir/Writing Automated Tests/Running and Organizing Tests/Times Two Tests) [INFO] [stdout] warning: the item `integration_tests` is imported redundantly [INFO] [stdout] --> Writing Automated Tests/Running and Organizing Tests/Integration Tests/tests/integration_test.rs:1:5 [INFO] [stdout] | [INFO] [stdout] 1 | use integration_tests; [INFO] [stdout] | ^^^^^^^^^^^^^^^^^ the item `integration_tests` is already defined by prelude [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_imports)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: 1 warning emitted [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: the item `TryFrom` is imported redundantly [INFO] [stdout] --> Standard Library Types/Type Conversions/Try From Into/tests/tests.rs:2:20 [INFO] [stdout] | [INFO] [stdout] 2 | use std::convert::{TryFrom, TryInto}; [INFO] [stdout] | ^^^^^^^ [INFO] [stdout] --> /rustc/af4a5a13a15fa0c60e06321077ef452f769b42fd/library/std/src/prelude/mod.rs:148:13 [INFO] [stdout] | [INFO] [stdout] = note: the item `TryFrom` is already defined here [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_imports)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: the item `TryInto` is imported redundantly [INFO] [stdout] --> Standard Library Types/Type Conversions/Try From Into/tests/tests.rs:2:29 [INFO] [stdout] | [INFO] [stdout] 2 | use std::convert::{TryFrom, TryInto}; [INFO] [stdout] | ^^^^^^^ [INFO] [stdout] --> /rustc/af4a5a13a15fa0c60e06321077ef452f769b42fd/library/std/src/prelude/mod.rs:148:13 [INFO] [stdout] | [INFO] [stdout] = note: the item `TryInto` is already defined here [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: the item `TryFrom` is imported redundantly [INFO] [stdout] --> Standard Library Types/Type Conversions/Try From Into/src/main.rs:2:20 [INFO] [stdout] | [INFO] [stdout] 2 | use std::convert::{TryFrom, TryInto}; [INFO] [stdout] | ^^^^^^^ [INFO] [stdout] --> /rustc/af4a5a13a15fa0c60e06321077ef452f769b42fd/library/std/src/prelude/mod.rs:148:13 [INFO] [stdout] | [INFO] [stdout] = note: the item `TryFrom` is already defined here [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_imports)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: the item `TryInto` is imported redundantly [INFO] [stdout] --> Standard Library Types/Type Conversions/Try From Into/src/main.rs:2:29 [INFO] [stdout] | [INFO] [stdout] 2 | use std::convert::{TryFrom, TryInto}; [INFO] [stdout] | ^^^^^^^ [INFO] [stdout] --> /rustc/af4a5a13a15fa0c60e06321077ef452f769b42fd/library/std/src/prelude/mod.rs:148:13 [INFO] [stdout] | [INFO] [stdout] = note: the item `TryInto` is already defined here [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: the item `TryFrom` is imported redundantly [INFO] [stdout] --> Standard Library Types/Type Conversions/Try From Into/src/main.rs:2:20 [INFO] [stdout] | [INFO] [stdout] 2 | use std::convert::{TryFrom, TryInto}; [INFO] [stdout] | ^^^^^^^ [INFO] [stdout] --> /rustc/af4a5a13a15fa0c60e06321077ef452f769b42fd/library/std/src/prelude/mod.rs:148:13 [INFO] [stdout] | [INFO] [stdout] = note: the item `TryFrom` is already defined here [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_imports)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: the item `TryInto` is imported redundantly [INFO] [stdout] --> Standard Library Types/Type Conversions/Try From Into/src/main.rs:2:29 [INFO] [stdout] | [INFO] [stdout] 2 | use std::convert::{TryFrom, TryInto}; [INFO] [stdout] | ^^^^^^^ [INFO] [stdout] --> /rustc/af4a5a13a15fa0c60e06321077ef452f769b42fd/library/std/src/prelude/mod.rs:148:13 [INFO] [stdout] | [INFO] [stdout] = note: the item `TryInto` is already defined here [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: 2 warnings emitted [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: 2 warnings emitted [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: 2 warnings emitted [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 refactoring_with_structs__adding_more_meaning v0.1.0 (/opt/rustwide/workdir/Structs, Methods, Enums, and Pattern Matching/Structs/Refactoring with Structs, Adding More Meaning) [INFO] [stderr] Checking return_type v0.1.0 (/opt/rustwide/workdir/Common Programming Concepts/Functions/Return Type) [INFO] [stderr] Checking explore_scopes v0.1.0 (/opt/rustwide/workdir/Understanding Ownership/What is ownership/Explore Scopes) [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 lifetime_annotations_in_struct_definitions v0.1.0 (/opt/rustwide/workdir/Generic Types, Traits, and Lifetime/Lifetimes/Lifetime Annotations in Struct Definitions) [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 numeric_operations v0.1.0 (/opt/rustwide/workdir/Common Programming Concepts/Basic Data Types/Numeric Operations) [INFO] [stderr] Checking quote v1.0.35 [INFO] [stderr] Checking returning_types_that_implement_traits v0.1.0 (/opt/rustwide/workdir/Generic Types, Traits, and Lifetime/Traits/Returning Types that Implement Traits) [INFO] [stderr] Checking shortcuts_for_panic_on_error___unwrap_and_expect v0.1.0 (/opt/rustwide/workdir/Error Handling/Error Handling/Shortcuts for Panic on Error - unwrap and expect) [INFO] [stderr] Checking macros2 v0.1.0 (/opt/rustwide/workdir/Macros/Declarative Macros/Declaring a Macro) [INFO] [stderr] Checking find_a_sum v0.1.0 (/opt/rustwide/workdir/Common Programming Concepts/Repetitions/Find a sum) [INFO] [stderr] Checking creating_a_channel v0.1.0 (/opt/rustwide/workdir/Fearless Concurrency/Using Message Passing to Transfer Data Between Threads/Creating a Channel) [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: `a` [INFO] [stdout] --> Understanding Ownership/What is ownership/Explore Scopes/src/main.rs:2:9 [INFO] [stdout] | [INFO] [stdout] 2 | let a = 0; [INFO] [stdout] | ^ help: if this is intentional, prefix it with an underscore: `_a` [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_variables)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `b` [INFO] [stdout] --> Understanding Ownership/What is ownership/Explore Scopes/src/main.rs:4:13 [INFO] [stdout] | [INFO] [stdout] 4 | let b = 1; [INFO] [stdout] | ^ help: if this is intentional, prefix it with an underscore: `_b` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `c` [INFO] [stdout] --> Understanding Ownership/What is ownership/Explore Scopes/src/main.rs:5:13 [INFO] [stdout] | [INFO] [stdout] 5 | let c = 2; [INFO] [stdout] | ^ help: if this is intentional, prefix it with an underscore: `_c` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `d` [INFO] [stdout] --> Understanding Ownership/What is ownership/Explore Scopes/src/main.rs:7:17 [INFO] [stdout] | [INFO] [stdout] 7 | let d = 3; [INFO] [stdout] | ^ help: if this is intentional, prefix it with an underscore: `_d` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `e` [INFO] [stdout] --> Understanding Ownership/What is ownership/Explore Scopes/src/main.rs:8:17 [INFO] [stdout] | [INFO] [stdout] 8 | let e = 4; [INFO] [stdout] | ^ help: if this is intentional, prefix it with an underscore: `_e` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `f` [INFO] [stdout] --> Understanding Ownership/What is ownership/Explore Scopes/src/main.rs:11:13 [INFO] [stdout] | [INFO] [stdout] 11 | let f = 5; [INFO] [stdout] | ^ help: if this is intentional, prefix it with an underscore: `_f` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `g` [INFO] [stdout] --> Understanding Ownership/What is ownership/Explore Scopes/src/main.rs:13:17 [INFO] [stdout] | [INFO] [stdout] 13 | let g = 6; [INFO] [stdout] | ^ help: if this is intentional, prefix it with an underscore: `_g` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `h` [INFO] [stdout] --> Understanding Ownership/What is ownership/Explore Scopes/src/main.rs:16:13 [INFO] [stdout] | [INFO] [stdout] 16 | let h = 7; [INFO] [stdout] | ^ help: if this is intentional, prefix it with an underscore: `_h` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `i` [INFO] [stdout] --> Understanding Ownership/What is ownership/Explore Scopes/src/main.rs:19:9 [INFO] [stdout] | [INFO] [stdout] 19 | let i = 8; [INFO] [stdout] | ^ help: if this is intentional, prefix it with an underscore: `_i` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: 9 warnings emitted [INFO] [stdout] [INFO] [stdout] [INFO] [stderr] Checking characters v0.1.0 (/opt/rustwide/workdir/Common Programming Concepts/Basic Data Types/Characters) [INFO] [stdout] warning: unused variable: `i` [INFO] [stdout] --> Generic Types, Traits, and Lifetime/Lifetimes/Lifetime Annotations in Struct Definitions/src/main.rs:8:9 [INFO] [stdout] | [INFO] [stdout] 8 | let i = ImportantExcerpt { [INFO] [stdout] | ^ help: if this is intentional, prefix it with an underscore: `_i` [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_variables)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stderr] Checking passing_an_argument v0.1.0 (/opt/rustwide/workdir/Common Programming Concepts/Functions/Passing an Argument) [INFO] [stderr] Checking the_tuple_type v0.1.0 (/opt/rustwide/workdir/Common Programming Concepts/Tuples and Arrays/The Tuple Type) [INFO] [stdout] warning: field `part` is never read [INFO] [stdout] --> Generic Types, Traits, and Lifetime/Lifetimes/Lifetime Annotations in Struct Definitions/src/main.rs:2:5 [INFO] [stdout] | [INFO] [stdout] 1 | struct ImportantExcerpt<'a> { [INFO] [stdout] | ---------------- field in this struct [INFO] [stdout] 2 | part: &'a str, [INFO] [stdout] | ^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(dead_code)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `sum` [INFO] [stdout] --> Common Programming Concepts/Basic Data Types/Numeric Operations/src/main.rs:3:9 [INFO] [stdout] | [INFO] [stdout] 3 | let sum = 5 + 10; [INFO] [stdout] | ^^^ help: if this is intentional, prefix it with an underscore: `_sum` [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_variables)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `difference` [INFO] [stdout] --> Common Programming Concepts/Basic Data Types/Numeric Operations/src/main.rs:6:9 [INFO] [stdout] | [INFO] [stdout] 6 | let difference = 95.5 - 4.3; [INFO] [stdout] | ^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_difference` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `product` [INFO] [stdout] --> Common Programming Concepts/Basic Data Types/Numeric Operations/src/main.rs:9:9 [INFO] [stdout] | [INFO] [stdout] 9 | let product = 4 * 30; [INFO] [stdout] | ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_product` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `quotient` [INFO] [stdout] --> Common Programming Concepts/Basic Data Types/Numeric Operations/src/main.rs:12:9 [INFO] [stdout] | [INFO] [stdout] 12 | let quotient = 56.7 / 32.2; [INFO] [stdout] | ^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_quotient` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `remainder` [INFO] [stdout] --> Common Programming Concepts/Basic Data Types/Numeric Operations/src/main.rs:15:9 [INFO] [stdout] | [INFO] [stdout] 15 | let remainder = 43 % 5; [INFO] [stdout] | ^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_remainder` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: 5 warnings emitted [INFO] [stdout] [INFO] [stdout] [INFO] [stderr] Checking creating_a_new_vector v0.1.0 (/opt/rustwide/workdir/Common Collections/Vectors/Creating a New Vector) [INFO] [stdout] warning: unused variable: `f` [INFO] [stdout] --> Error Handling/Error Handling/Shortcuts for Panic on Error - unwrap and expect/src/main.rs:4:9 [INFO] [stdout] | [INFO] [stdout] 4 | let f = File::open("hello.txt").unwrap(); [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] [stdout] warning: unused variable: `f` [INFO] [stdout] --> Error Handling/Error Handling/Shortcuts for Panic on Error - unwrap and expect/src/main.rs:6:9 [INFO] [stdout] | [INFO] [stdout] 6 | let f = File::open("hello.txt").expect("Failed to open hello.txt"); [INFO] [stdout] | ^ help: if this is intentional, prefix it with an underscore: `_f` [INFO] [stdout] [INFO] [stdout] [INFO] [stderr] Checking check_more_clippy_suggestions v0.1.0 (/opt/rustwide/workdir/Common Collections/Options/Check More Clippy Suggestions) [INFO] [stdout] warning: 2 warnings emitted [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `returns_summarizable` is never used [INFO] [stdout] --> Generic Types, Traits, and Lifetime/Traits/Returning Types that Implement Traits/src/main.rs:19:4 [INFO] [stdout] | [INFO] [stdout] 19 | fn returns_summarizable() -> impl Summary { [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(dead_code)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: 2 warnings emitted [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: 1 warning emitted [INFO] [stdout] [INFO] [stdout] [INFO] [stderr] Checking defining_a_function v0.1.0 (/opt/rustwide/workdir/Common Programming Concepts/Functions/Defining a Function) [INFO] [stderr] Checking example_structs v0.1.0 (/opt/rustwide/workdir/Structs, Methods, Enums, and Pattern Matching/Structs/Dealing with Rectangles) [INFO] [stdout] warning: unused variable: `tx` [INFO] [stdout] --> Fearless Concurrency/Using Message Passing to Transfer Data Between Threads/Creating a Channel/src/main.rs:4:10 [INFO] [stdout] | [INFO] [stdout] 4 | let (tx, rx) = mpsc::channel::(); [INFO] [stdout] | ^^ help: if this is intentional, prefix it with an underscore: `_tx` [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_variables)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stderr] Checking structs_intro v0.1.0 (/opt/rustwide/workdir/Structs, Methods, Enums, and Pattern Matching/Structs/Intro) [INFO] [stdout] warning: unused variable: `rx` [INFO] [stdout] --> Fearless Concurrency/Using Message Passing to Transfer Data Between Threads/Creating a Channel/src/main.rs:4:14 [INFO] [stdout] | [INFO] [stdout] 4 | let (tx, rx) = mpsc::channel::(); [INFO] [stdout] | ^^ help: if this is intentional, prefix it with an underscore: `_rx` [INFO] [stdout] [INFO] [stdout] [INFO] [stderr] Checking vectors v0.1.0 (/opt/rustwide/workdir/Common Collections/Vectors/Using an Enum to Store Multiple Types) [INFO] [stdout] warning: 2 warnings emitted [INFO] [stdout] [INFO] [stdout] [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] [stderr] Checking computing_the_largest_number v0.1.0 (/opt/rustwide/workdir/Generic Types, Traits, and Lifetime/Intro/Computing the Largest Number) [INFO] [stdout] warning: unused variable: `c` [INFO] [stdout] --> Common Programming Concepts/Basic Data Types/Characters/src/main.rs:2:9 [INFO] [stdout] | [INFO] [stdout] 2 | let c = 'z'; [INFO] [stdout] | ^ help: if this is intentional, prefix it with an underscore: `_c` [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/Basic Data Types/Characters/src/main.rs:3:9 [INFO] [stdout] | [INFO] [stdout] 3 | let z = 'ℤ'; [INFO] [stdout] | ^ help: if this is intentional, prefix it with an underscore: `_z` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `heart` [INFO] [stdout] --> Common Programming Concepts/Basic Data Types/Characters/src/main.rs:4:9 [INFO] [stdout] | [INFO] [stdout] 4 | let heart = '❤'; [INFO] [stdout] | ^^^^^ help: if this is intentional, prefix it with an underscore: `_heart` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: 3 warnings emitted [INFO] [stdout] [INFO] [stdout] [INFO] [stderr] Checking variables3 v0.1.0 (/opt/rustwide/workdir/Common Programming Concepts/Variables/Mutable Variable Binding) [INFO] [stderr] Checking enums_intro v0.1.0 (/opt/rustwide/workdir/Structs, Methods, Enums, and Pattern Matching/Enums/Intro) [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] [stdout] warning: 2 warnings emitted [INFO] [stdout] [INFO] [stdout] [INFO] [stderr] Checking adding_custom_failure_messages v0.1.0 (/opt/rustwide/workdir/Writing Automated Tests/How to Write Tests/Adding Custom Failure Messages) [INFO] [stderr] Checking defining_and_initiating_structs v0.1.0 (/opt/rustwide/workdir/Structs, Methods, Enums, and Pattern Matching/Structs/Defining and Initiating Structs) [INFO] [stderr] Checking in_struct_definitions v0.1.0 (/opt/rustwide/workdir/Generic Types, Traits, and Lifetime/Generic Data Types/In Struct Definitions) [INFO] [stderr] Checking modules_intro v0.1.0 (/opt/rustwide/workdir/Modules/Modules/Intro) [INFO] [stderr] Checking moving_captured_values_out_of_the_closure_and_the_fn_traits v0.1.0 (/opt/rustwide/workdir/Standard Library Types/Closures/Moving Captured Values Out of the Closure and the Fn Traits) [INFO] [stderr] Checking the_iterator_trait_and_the_next_method v0.1.0 (/opt/rustwide/workdir/Standard Library Types/Iterators/The Iterator Trait and the next Method) [INFO] [stdout] warning: unused variable: `row` [INFO] [stdout] --> Common Collections/Vectors/Using an Enum to Store Multiple Types/src/main.rs:8:9 [INFO] [stdout] | [INFO] [stdout] 8 | let row = vec![ [INFO] [stdout] | ^^^ help: if this is intentional, prefix it with an underscore: `_row` [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: field `0` is never read [INFO] [stdout] --> Common Collections/Vectors/Using an Enum to Store Multiple Types/src/main.rs:2:9 [INFO] [stdout] | [INFO] [stdout] 2 | Int(i32), [INFO] [stdout] | --- ^^^ [INFO] [stdout] | | [INFO] [stdout] | field in this variant [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(dead_code)]` on by default [INFO] [stdout] help: consider changing the field to be of unit type to suppress this warning while preserving the field numbering, or remove the field [INFO] [stdout] | [INFO] [stdout] 2 | Int(()), [INFO] [stdout] | ~~ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: field `0` is never read [INFO] [stdout] --> Common Collections/Vectors/Using an Enum to Store Multiple Types/src/main.rs:3:11 [INFO] [stdout] | [INFO] [stdout] 3 | Float(f64), [INFO] [stdout] | ----- ^^^ [INFO] [stdout] | | [INFO] [stdout] | field in this variant [INFO] [stdout] | [INFO] [stdout] help: consider changing the field to be of unit type to suppress this warning while preserving the field numbering, or remove the field [INFO] [stdout] | [INFO] [stdout] 3 | Float(()), [INFO] [stdout] | ~~ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: field `0` is never read [INFO] [stdout] --> Common Collections/Vectors/Using an Enum to Store Multiple Types/src/main.rs:4:10 [INFO] [stdout] | [INFO] [stdout] 4 | Text(String), [INFO] [stdout] | ---- ^^^^^^ [INFO] [stdout] | | [INFO] [stdout] | field in this variant [INFO] [stdout] | [INFO] [stdout] help: consider changing the field to be of unit type to suppress this warning while preserving the field numbering, or remove the field [INFO] [stdout] | [INFO] [stdout] 4 | Text(()), [INFO] [stdout] | ~~ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: 1 warning emitted [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: 4 warnings emitted [INFO] [stdout] [INFO] [stdout] [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 shadowing v0.1.0 (/opt/rustwide/workdir/Common Programming Concepts/Variables/Shadowing) [INFO] [stderr] Checking implement_match v0.1.0 (/opt/rustwide/workdir/Structs, Methods, Enums, and Pattern Matching/Pattern Matching/Implement Match) [INFO] [stderr] Checking statements_and_expressions v0.1.0 (/opt/rustwide/workdir/Common Programming Concepts/Functions/Statements and Expressions) [INFO] [stderr] Checking intro_methods v0.1.0 (/opt/rustwide/workdir/Structs, Methods, Enums, and Pattern Matching/Structs with Methods/Intro) [INFO] [stdout] warning: unused variable: `both_integer` [INFO] [stdout] --> Generic Types, Traits, and Lifetime/Generic Data Types/In Struct Definitions/src/main.rs:7:9 [INFO] [stdout] | [INFO] [stdout] 7 | let both_integer = Point { x: 5, y: 10 }; [INFO] [stdout] | ^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_both_integer` [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_variables)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `both_float` [INFO] [stdout] --> Generic Types, Traits, and Lifetime/Generic Data Types/In Struct Definitions/src/main.rs:8:9 [INFO] [stdout] | [INFO] [stdout] 8 | let both_float = Point { x: 1.0, y: 4.0 }; [INFO] [stdout] | ^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_both_float` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `integer_and_float` [INFO] [stdout] --> Generic Types, Traits, and Lifetime/Generic Data Types/In Struct Definitions/src/main.rs:9:9 [INFO] [stdout] | [INFO] [stdout] 9 | let integer_and_float = Point { x: 5, y: 4.0 }; [INFO] [stdout] | ^^^^^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_integer_and_float` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: fields `x` and `y` are never read [INFO] [stdout] --> Generic Types, Traits, and Lifetime/Generic Data Types/In Struct Definitions/src/main.rs:2:5 [INFO] [stdout] | [INFO] [stdout] 1 | struct Point { [INFO] [stdout] | ----- fields in this struct [INFO] [stdout] 2 | x: T, [INFO] [stdout] | ^ [INFO] [stdout] 3 | y: U, [INFO] [stdout] | ^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(dead_code)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stderr] Checking atomic_reference_counting_with_arc v0.1.0 (/opt/rustwide/workdir/Fearless Concurrency/Shared-State Concurrency/Atomic Reference Counting with Arc) [INFO] [stdout] warning: fields `sign_in_count` and `active` are never read [INFO] [stdout] --> Structs, Methods, Enums, and Pattern Matching/Structs/Defining and Initiating Structs/src/main.rs:4:5 [INFO] [stdout] | [INFO] [stdout] 1 | struct User { [INFO] [stdout] | ---- fields in this struct [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: 1 warning emitted [INFO] [stdout] [INFO] [stdout] [INFO] [stderr] Checking traits v0.1.0 (/opt/rustwide/workdir/Generic Types, Traits, and Lifetime/Traits/Traits) [INFO] [stderr] Checking accessing_values_in_a_hash_map v0.1.0 (/opt/rustwide/workdir/Common Collections/Hashmaps/Accessing Values in a Hash Map) [INFO] [stdout] warning: 4 warnings emitted [INFO] [stdout] [INFO] [stdout] [INFO] [stderr] Checking use_rc v0.1.0 (/opt/rustwide/workdir/Standard Library Types/Smart Pointers/Use Rc) [INFO] [stderr] Checking matching_result_2 v0.1.0 (/opt/rustwide/workdir/Error Handling/Error Handling/Matching Result 2) [INFO] [stderr] Checking booleans v0.1.0 (/opt/rustwide/workdir/Common Programming Concepts/Basic Data Types/Booleans) [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] [stderr] Checking mutable_references v0.1.0 (/opt/rustwide/workdir/Understanding Ownership/References and Borrowing/Mutable References) [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 indexing_into_strings v0.1.0 (/opt/rustwide/workdir/Common Collections/Strings/Indexing into Strings) [INFO] [stderr] Checking propagating_errors v0.1.0 (/opt/rustwide/workdir/Error Handling/Error Handling/Propagating Errors) [INFO] [stdout] warning: unused variable: `x` [INFO] [stdout] --> Common Programming Concepts/Functions/Statements and Expressions/src/main.rs:2:9 [INFO] [stdout] | [INFO] [stdout] 2 | let x = 5; [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: 2 warnings emitted [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: 1 warning emitted [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: fields `x` and `y` are never read [INFO] [stdout] --> Structs, Methods, Enums, and Pattern Matching/Pattern Matching/Implement Match/src/main.rs:11:5 [INFO] [stdout] | [INFO] [stdout] 10 | struct Point { [INFO] [stdout] | ----- fields in this struct [INFO] [stdout] 11 | x: u8, [INFO] [stdout] | ^ [INFO] [stdout] 12 | y: u8, [INFO] [stdout] | ^ [INFO] [stdout] | [INFO] [stdout] = note: `Point` 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] [stderr] Checking repetition_with_loops v0.1.0 (/opt/rustwide/workdir/Common Programming Concepts/Repetitions/Repetition with Loops) [INFO] [stderr] Checking returning_a_string v0.1.0 (/opt/rustwide/workdir/Common Collections/Strings/Return a String) [INFO] [stdout] warning: 1 warning emitted [INFO] [stdout] [INFO] [stdout] [INFO] [stderr] Checking restaurant v0.1.0 (/opt/rustwide/workdir/Modules/Modules/Defining Modules) [INFO] [stderr] Checking methods_that_produce_other_iterators v0.1.0 (/opt/rustwide/workdir/Standard Library Types/Iterators/Methods that Produce Other Iterators) [INFO] [stdout] warning: unused variable: `t` [INFO] [stdout] --> Common Programming Concepts/Basic Data Types/Booleans/src/main.rs:2:9 [INFO] [stdout] | [INFO] [stdout] 2 | let t = true; [INFO] [stdout] | ^ help: if this is intentional, prefix it with an underscore: `_t` [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_variables)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `f` [INFO] [stdout] --> Common Programming Concepts/Basic Data Types/Booleans/src/main.rs:4:9 [INFO] [stdout] | [INFO] [stdout] 4 | let f: bool = false; // with explicit type annotation [INFO] [stdout] | ^ help: if this is intentional, prefix it with an underscore: `_f` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: 2 warnings emitted [INFO] [stdout] [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 { [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(dead_code)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stderr] Checking clone_or_copy v0.1.0 (/opt/rustwide/workdir/Understanding Ownership/What is ownership/Tuples, Clone or Copy) [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] [stdout] warning: 1 warning emitted [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] error[E0277]: the type `str` cannot be indexed by `{integer}` [INFO] [stdout] --> Common Collections/Strings/Indexing into Strings/src/main.rs:4:16 [INFO] [stdout] | [INFO] [stdout] 4 | let h = s1[0]; [INFO] [stdout] | ^ string indices are ranges of `usize` [INFO] [stdout] | [INFO] [stdout] = help: the trait `SliceIndex` is not implemented for `{integer}`, which is required by `String: Index<_>` [INFO] [stdout] = note: you can use `.chars().nth()` or `.bytes().nth()` [INFO] [stdout] for more information, see chapter 8 in The Book: [INFO] [stdout] = help: the trait `SliceIndex<[_]>` is implemented for `usize` [INFO] [stdout] = help: for that trait implementation, expected `[_]`, found `str` [INFO] [stdout] = note: required for `String` to implement `Index<{integer}>` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] error: aborting due to 1 previous error [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] For more information about this error, try `rustc --explain E0277`. [INFO] [stdout] [INFO] [stderr] Checking ownership_and_functions v0.1.0 (/opt/rustwide/workdir/Understanding Ownership/What is ownership/Ownership and Functions) [INFO] [stderr] Checking strings_intro v0.1.0 (/opt/rustwide/workdir/Common Collections/Strings/Intro) [INFO] [stderr] error: could not compile `indexing_into_strings` (bin "indexing_into_strings") due to 2 previous errors [INFO] [stdout] warning: field `0` is never read [INFO] [stdout] --> Standard Library Types/Smart Pointers/Use Rc/src/main.rs:8:13 [INFO] [stdout] | [INFO] [stdout] 8 | Mercury(Rc), [INFO] [stdout] | ------- ^^^^^^^ [INFO] [stdout] | | [INFO] [stdout] | field in this variant [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(dead_code)]` on by default [INFO] [stdout] help: consider changing the field to be of unit type to suppress this warning while preserving the field numbering, or remove the field [INFO] [stdout] | [INFO] [stdout] 8 | Mercury(()), [INFO] [stdout] | ~~ [INFO] [stdout] [INFO] [stdout] [INFO] [stderr] warning: build failed, waiting for other jobs to finish... [INFO] [stdout] warning: field `0` is never read [INFO] [stdout] --> Standard Library Types/Smart Pointers/Use Rc/src/main.rs:9:11 [INFO] [stdout] | [INFO] [stdout] 9 | Venus(Rc), [INFO] [stdout] | ----- ^^^^^^^ [INFO] [stdout] | | [INFO] [stdout] | field in this variant [INFO] [stdout] | [INFO] [stdout] help: consider changing the field to be of unit type to suppress this warning while preserving the field numbering, or remove the field [INFO] [stdout] | [INFO] [stdout] 9 | Venus(()), [INFO] [stdout] | ~~ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: field `0` is never read [INFO] [stdout] --> Standard Library Types/Smart Pointers/Use Rc/src/main.rs:10:11 [INFO] [stdout] | [INFO] [stdout] 10 | Earth(Rc), [INFO] [stdout] | ----- ^^^^^^^ [INFO] [stdout] | | [INFO] [stdout] | field in this variant [INFO] [stdout] | [INFO] [stdout] help: consider changing the field to be of unit type to suppress this warning while preserving the field numbering, or remove the field [INFO] [stdout] | [INFO] [stdout] 10 | Earth(()), [INFO] [stdout] | ~~ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: field `0` is never read [INFO] [stdout] --> Standard Library Types/Smart Pointers/Use Rc/src/main.rs:11:10 [INFO] [stdout] | [INFO] [stdout] 11 | Mars(Rc), [INFO] [stdout] | ---- ^^^^^^^ [INFO] [stdout] | | [INFO] [stdout] | field in this variant [INFO] [stdout] | [INFO] [stdout] help: consider changing the field to be of unit type to suppress this warning while preserving the field numbering, or remove the field [INFO] [stdout] | [INFO] [stdout] 11 | Mars(()), [INFO] [stdout] | ~~ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: field `0` is never read [INFO] [stdout] --> Standard Library Types/Smart Pointers/Use Rc/src/main.rs:12:13 [INFO] [stdout] | [INFO] [stdout] 12 | Jupiter(Rc), [INFO] [stdout] | ------- ^^^^^^^ [INFO] [stdout] | | [INFO] [stdout] | field in this variant [INFO] [stdout] | [INFO] [stdout] help: consider changing the field to be of unit type to suppress this warning while preserving the field numbering, or remove the field [INFO] [stdout] | [INFO] [stdout] 12 | Jupiter(()), [INFO] [stdout] | ~~ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: field `0` is never read [INFO] [stdout] --> Standard Library Types/Smart Pointers/Use Rc/src/main.rs:13:12 [INFO] [stdout] | [INFO] [stdout] 13 | Saturn(Rc), [INFO] [stdout] | ------ ^^^^^^^ [INFO] [stdout] | | [INFO] [stdout] | field in this variant [INFO] [stdout] | [INFO] [stdout] help: consider changing the field to be of unit type to suppress this warning while preserving the field numbering, or remove the field [INFO] [stdout] | [INFO] [stdout] 13 | Saturn(()), [INFO] [stdout] | ~~ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: field `0` is never read [INFO] [stdout] --> Standard Library Types/Smart Pointers/Use Rc/src/main.rs:14:12 [INFO] [stdout] | [INFO] [stdout] 14 | Uranus(Rc), [INFO] [stdout] | ------ ^^^^^^^ [INFO] [stdout] | | [INFO] [stdout] | field in this variant [INFO] [stdout] | [INFO] [stdout] help: consider changing the field to be of unit type to suppress this warning while preserving the field numbering, or remove the field [INFO] [stdout] | [INFO] [stdout] 14 | Uranus(()), [INFO] [stdout] | ~~ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: field `0` is never read [INFO] [stdout] --> Standard Library Types/Smart Pointers/Use Rc/src/main.rs:15:13 [INFO] [stdout] | [INFO] [stdout] 15 | Neptune(Rc), [INFO] [stdout] | ------- ^^^^^^^ [INFO] [stdout] | | [INFO] [stdout] | field in this variant [INFO] [stdout] | [INFO] [stdout] help: consider changing the field to be of unit type to suppress this warning while preserving the field numbering, or remove the field [INFO] [stdout] | [INFO] [stdout] 15 | Neptune(()), [INFO] [stdout] | ~~ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: 8 warnings emitted [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `add_to_waitlist` is never used [INFO] [stdout] --> Modules/Modules/Defining Modules/src/lib.rs:3:12 [INFO] [stdout] | [INFO] [stdout] 3 | fn add_to_waitlist() {} [INFO] [stdout] | ^^^^^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(dead_code)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `seat_at_table` is never used [INFO] [stdout] --> Modules/Modules/Defining Modules/src/lib.rs:5:12 [INFO] [stdout] | [INFO] [stdout] 5 | fn seat_at_table() {} [INFO] [stdout] | ^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `take_order` is never used [INFO] [stdout] --> Modules/Modules/Defining Modules/src/lib.rs:9:12 [INFO] [stdout] | [INFO] [stdout] 9 | fn take_order() {} [INFO] [stdout] | ^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `serve_order` is never used [INFO] [stdout] --> Modules/Modules/Defining Modules/src/lib.rs:11:12 [INFO] [stdout] | [INFO] [stdout] 11 | fn serve_order() {} [INFO] [stdout] | ^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `take_payment` is never used [INFO] [stdout] --> Modules/Modules/Defining Modules/src/lib.rs:13:12 [INFO] [stdout] | [INFO] [stdout] 13 | fn take_payment() {} [INFO] [stdout] | ^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: 5 warnings emitted [INFO] [stdout] [INFO] [stdout] [INFO] running `Command { std: "docker" "inspect" "355ec8432f62949dfa357de20b3430268e24388f233990b7107707cbc7a80703", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "355ec8432f62949dfa357de20b3430268e24388f233990b7107707cbc7a80703", kill_on_drop: false }` [INFO] [stdout] 355ec8432f62949dfa357de20b3430268e24388f233990b7107707cbc7a80703