[INFO] cloning repository https://github.com/pythoninthegrasses/rustlings [INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/pythoninthegrasses/rustlings" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fpythoninthegrasses%2Frustlings", kill_on_drop: false }` [INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fpythoninthegrasses%2Frustlings'... [INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }` [INFO] [stdout] ce736420876953ae45f7bed13b83fdbec3208543 [INFO] checking pythoninthegrasses/rustlings against try#a611f2a14e38407ec6717a86a01424ee6fc80762 for pr-154992 [INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fpythoninthegrasses%2Frustlings" "/workspace/builds/worker-1-tc2/source", kill_on_drop: false }` [INFO] [stderr] Cloning into '/workspace/builds/worker-1-tc2/source'... [INFO] [stderr] done. [INFO] started tweaking git repo https://github.com/pythoninthegrasses/rustlings [INFO] finished tweaking git repo https://github.com/pythoninthegrasses/rustlings [INFO] tweaked toml for git repo https://github.com/pythoninthegrasses/rustlings written to /workspace/builds/worker-1-tc2/source/Cargo.toml [INFO] validating manifest of git repo https://github.com/pythoninthegrasses/rustlings on toolchain a611f2a14e38407ec6717a86a01424ee6fc80762 [INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+a611f2a14e38407ec6717a86a01424ee6fc80762" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }` [INFO] crate git repo https://github.com/pythoninthegrasses/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" "+a611f2a14e38407ec6717a86a01424ee6fc80762" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }` [INFO] [stderr] Blocking waiting for file lock on package cache [INFO] [stderr] Blocking waiting for file lock on package cache [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+a611f2a14e38407ec6717a86a01424ee6fc80762" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }` [INFO] [stdout] fe6ed2cdce802de5d802a18e3c5188bbce3855d6d0a95dcc1efdbe41d96e5314 [INFO] running `Command { std: "docker" "start" "-a" "fe6ed2cdce802de5d802a18e3c5188bbce3855d6d0a95dcc1efdbe41d96e5314", kill_on_drop: false }` [INFO] running `Command { std: "docker" "inspect" "fe6ed2cdce802de5d802a18e3c5188bbce3855d6d0a95dcc1efdbe41d96e5314", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "fe6ed2cdce802de5d802a18e3c5188bbce3855d6d0a95dcc1efdbe41d96e5314", kill_on_drop: false }` [INFO] [stdout] fe6ed2cdce802de5d802a18e3c5188bbce3855d6d0a95dcc1efdbe41d96e5314 [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+a611f2a14e38407ec6717a86a01424ee6fc80762" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }` [INFO] [stdout] 5f4bcd00e32835dceeee6bbe00b181d24bb0dc078ea28e93006d9b400bccebd3 [INFO] running `Command { std: "docker" "start" "-a" "5f4bcd00e32835dceeee6bbe00b181d24bb0dc078ea28e93006d9b400bccebd3", kill_on_drop: false }` [INFO] [stderr] Checking exercises v0.0.0 (/opt/rustwide/workdir) [INFO] [stdout] warning: unused variable: `basket` [INFO] [stdout] --> exercises/11_hashmaps/hashmaps2.rs:22:17 [INFO] [stdout] | [INFO] [stdout] 22 | fn fruit_basket(basket: &mut HashMap) { [INFO] [stdout] | ^^^^^^ help: if this is intentional, prefix it with an underscore: `_basket` [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `fruit` [INFO] [stdout] --> exercises/11_hashmaps/hashmaps2.rs:31:9 [INFO] [stdout] | [INFO] [stdout] 31 | for fruit in fruit_kinds { [INFO] [stdout] | ^^^^^ help: if this is intentional, prefix it with an underscore: `_fruit` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] error[E0282]: type annotations needed for `Vec<_>` [INFO] [stdout] --> exercises/20_threads/threads1.rs:23:9 [INFO] [stdout] | [INFO] [stdout] 23 | let mut results = Vec::new(); [INFO] [stdout] | ^^^^^^^^^^^ ---------- type must be known at this point [INFO] [stdout] | [INFO] [stdout] help: consider giving `results` an explicit type, where the type for type parameter `T` is specified [INFO] [stdout] | [INFO] [stdout] 23 | let mut results: Vec = Vec::new(); [INFO] [stdout] | ++++++++ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: variable does not need to be mutable [INFO] [stdout] --> exercises/11_hashmaps/hashmaps3.rs:20:9 [INFO] [stdout] | [INFO] [stdout] 20 | let mut scores = HashMap::<&str, TeamScores>::new(); [INFO] [stdout] | ----^^^^^^ [INFO] [stdout] | | [INFO] [stdout] | help: remove this `mut` [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_mut)]` (part of `#[warn(unused)]`) on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `team_1_name` [INFO] [stdout] --> exercises/11_hashmaps/hashmaps3.rs:25:13 [INFO] [stdout] | [INFO] [stdout] 25 | let team_1_name = split_iterator.next().unwrap(); [INFO] [stdout] | ^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_team_1_name` [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `team_2_name` [INFO] [stdout] --> exercises/11_hashmaps/hashmaps3.rs:26:13 [INFO] [stdout] | [INFO] [stdout] 26 | let team_2_name = split_iterator.next().unwrap(); [INFO] [stdout] | ^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_team_2_name` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `team_1_score` [INFO] [stdout] --> exercises/11_hashmaps/hashmaps3.rs:27:13 [INFO] [stdout] | [INFO] [stdout] 27 | let team_1_score: u8 = split_iterator.next().unwrap().parse().unwrap(); [INFO] [stdout] | ^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_team_1_score` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `team_2_score` [INFO] [stdout] --> exercises/11_hashmaps/hashmaps3.rs:28:13 [INFO] [stdout] | [INFO] [stdout] 28 | let team_2_score: u8 = split_iterator.next().unwrap().parse().unwrap(); [INFO] [stdout] | ^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_team_2_score` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] For more information about this error, try `rustc --explain E0282`. [INFO] [stdout] [INFO] [stdout] error[E0277]: cannot divide `f64` by `usize` [INFO] [stdout] --> exercises/23_conversions/using_as.rs:8:11 [INFO] [stdout] | [INFO] [stdout] 8 | total / values.len() [INFO] [stdout] | ^ no implementation for `f64 / usize` [INFO] [stdout] | [INFO] [stdout] = help: the trait `Div` is not implemented for `f64` [INFO] [stdout] help: the following other types implement trait `Div` [INFO] [stdout] --> /rustc/a611f2a14e38407ec6717a86a01424ee6fc80762/library/core/src/ops/arith.rs:511:8 [INFO] [stdout] | [INFO] [stdout] = note: `f64` implements `Div` [INFO] [stdout] ::: /rustc/a611f2a14e38407ec6717a86a01424ee6fc80762/library/core/src/ops/arith.rs:524:0 [INFO] [stdout] | [INFO] [stdout] = note: in this macro invocation [INFO] [stdout] --> /rustc/a611f2a14e38407ec6717a86a01424ee6fc80762/library/core/src/internal_macros.rs:22:8 [INFO] [stdout] | [INFO] [stdout] = note: `&f64` implements `Div` [INFO] [stdout] ::: /rustc/a611f2a14e38407ec6717a86a01424ee6fc80762/library/core/src/internal_macros.rs:33:8 [INFO] [stdout] | [INFO] [stdout] = note: `f64` implements `Div<&f64>` [INFO] [stdout] ::: /rustc/a611f2a14e38407ec6717a86a01424ee6fc80762/library/core/src/internal_macros.rs:44:8 [INFO] [stdout] | [INFO] [stdout] = note: `&f64` implements `Div` [INFO] [stdout] = note: this error originates in the macro `div_impl_float` (in Nightly builds, run with -Z macro-backtrace for more info) [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] For more information about this error, try `rustc --explain E0277`. [INFO] [stdout] [INFO] [stderr] error: could not compile `exercises` (bin "threads1") due to 1 previous error [INFO] [stderr] warning: build failed, waiting for other jobs to finish... [INFO] [stderr] error: could not compile `exercises` (bin "using_as") due to 1 previous error [INFO] [stdout] error[E0308]: mismatched types [INFO] [stdout] --> exercises/03_if/if2.rs:6:9 [INFO] [stdout] | [INFO] [stdout] 2 | fn picky_eater(food: &str) -> &str { [INFO] [stdout] | ---- expected `&str` because of return type [INFO] [stdout] ... [INFO] [stdout] 6 | 1 [INFO] [stdout] | ^ expected `&str`, found integer [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] error[E0308]: `if` and `else` have incompatible types [INFO] [stdout] --> exercises/03_if/if3.rs:10:9 [INFO] [stdout] | [INFO] [stdout] 7 | } else if animal == "snake" { [INFO] [stdout] | ____________- [INFO] [stdout] 8 | | 3 [INFO] [stdout] | | - expected because of this [INFO] [stdout] 9 | | } else { [INFO] [stdout] 10 | | "Unknown" [INFO] [stdout] | | ^^^^^^^^^ expected integer, found `&str` [INFO] [stdout] 11 | | }; [INFO] [stdout] | |_____- `if` and `else` have incompatible types [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] For more information about this error, try `rustc --explain E0308`. [INFO] [stdout] [INFO] [stderr] error: could not compile `exercises` (bin "if3" test) due to 1 previous error [INFO] [stdout] error[E0599]: no variant, associated function, or constant named `Resize` found for enum `Message` in the current scope [INFO] [stdout] --> exercises/08_enums/enums1.rs:7:31 [INFO] [stdout] | [INFO] [stdout] 2 | enum Message { [INFO] [stdout] | ------------ variant, associated function, or constant `Resize` not found for this enum [INFO] [stdout] ... [INFO] [stdout] 7 | println!("{:?}", Message::Resize); [INFO] [stdout] | ^^^^^^ variant, associated function, or constant not found in `Message` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] error[E0599]: no variant, associated function, or constant named `Move` found for enum `Message` in the current scope [INFO] [stdout] --> exercises/08_enums/enums1.rs:8:31 [INFO] [stdout] | [INFO] [stdout] 2 | enum Message { [INFO] [stdout] | ------------ variant, associated function, or constant `Move` not found for this enum [INFO] [stdout] ... [INFO] [stdout] 8 | println!("{:?}", Message::Move); [INFO] [stdout] | ^^^^ variant, associated function, or constant not found in `Message` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: for loop over an `Option`. This is more readably written as an `if let` statement [INFO] [stdout] --> exercises/22_clippy/clippy2.rs:5:14 [INFO] [stdout] | [INFO] [stdout] 5 | for x in option { [INFO] [stdout] | ^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(for_loops_over_fallibles)]` on by default [INFO] [stdout] help: to check pattern in a loop use `while let` [INFO] [stdout] | [INFO] [stdout] 5 - for x in option { [INFO] [stdout] 5 + while let Some(x) = option { [INFO] [stdout] | [INFO] [stdout] help: consider using `if let` to clear intent [INFO] [stdout] | [INFO] [stdout] 5 - for x in option { [INFO] [stdout] 5 + if let Some(x) = option { [INFO] [stdout] | [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] error[E0599]: no variant, associated function, or constant named `Echo` found for enum `Message` in the current scope [INFO] [stdout] --> exercises/08_enums/enums1.rs:9:31 [INFO] [stdout] | [INFO] [stdout] 2 | enum Message { [INFO] [stdout] | ------------ variant, associated function, or constant `Echo` not found for this enum [INFO] [stdout] ... [INFO] [stdout] 9 | println!("{:?}", Message::Echo); [INFO] [stdout] | ^^^^ variant, associated function, or constant not found in `Message` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] For more information about this error, try `rustc --explain E0308`. [INFO] [stdout] [INFO] [stdout] error[E0599]: no variant, associated function, or constant named `ChangeColor` found for enum `Message` in the current scope [INFO] [stdout] --> exercises/08_enums/enums1.rs:10:31 [INFO] [stdout] | [INFO] [stdout] 2 | enum Message { [INFO] [stdout] | ------------ variant, associated function, or constant `ChangeColor` not found for this enum [INFO] [stdout] ... [INFO] [stdout] 10 | println!("{:?}", Message::ChangeColor); [INFO] [stdout] | ^^^^^^^^^^^ variant, associated function, or constant not found in `Message` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] error[E0599]: no variant, associated function, or constant named `Quit` found for enum `Message` in the current scope [INFO] [stdout] --> exercises/08_enums/enums1.rs:11:31 [INFO] [stdout] | [INFO] [stdout] 2 | enum Message { [INFO] [stdout] | ------------ variant, associated function, or constant `Quit` not found for this enum [INFO] [stdout] ... [INFO] [stdout] 11 | println!("{:?}", Message::Quit); [INFO] [stdout] | ^^^^ variant, associated function, or constant not found in `Message` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] error[E0277]: the `?` operator can only be used in a function that returns `Result` or `Option` (or another type that implements `FromResidual`) [INFO] [stdout] --> exercises/13_error_handling/errors3.rs:23:46 [INFO] [stdout] | [INFO] [stdout] 18 | fn main() { [INFO] [stdout] | --------- this function should return `Result` or `Option` to accept `?` [INFO] [stdout] ... [INFO] [stdout] 23 | let cost = total_cost(pretend_user_input)?; [INFO] [stdout] | ^ cannot use the `?` operator in a function that returns `()` [INFO] [stdout] | [INFO] [stdout] help: consider adding return type [INFO] [stdout] | [INFO] [stdout] 18 | fn main() -> Result<(), Box> { [INFO] [stdout] | +++++++++++++++++++++++++++++++++++++++++ [INFO] [stdout] [INFO] [stdout] [INFO] [stderr] error: could not compile `exercises` (bin "if2" test) due to 1 previous error [INFO] [stdout] For more information about this error, try `rustc --explain E0277`. [INFO] [stdout] [INFO] [stdout] For more information about this error, try `rustc --explain E0599`. [INFO] [stdout] [INFO] [stderr] error: could not compile `exercises` (bin "enums1" test) due to 5 previous errors [INFO] [stdout] error[E0106]: missing lifetime specifier [INFO] [stdout] --> exercises/16_lifetimes/lifetimes3.rs:5:13 [INFO] [stdout] | [INFO] [stdout] 5 | author: &str, [INFO] [stdout] | ^ expected named lifetime parameter [INFO] [stdout] | [INFO] [stdout] help: consider introducing a named lifetime parameter [INFO] [stdout] | [INFO] [stdout] 4 ~ struct Book<'a> { [INFO] [stdout] 5 ~ author: &'a str, [INFO] [stdout] | [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] error[E0106]: missing lifetime specifier [INFO] [stdout] --> exercises/16_lifetimes/lifetimes3.rs:6:12 [INFO] [stdout] | [INFO] [stdout] 6 | title: &str, [INFO] [stdout] | ^ expected named lifetime parameter [INFO] [stdout] | [INFO] [stdout] help: consider introducing a named lifetime parameter [INFO] [stdout] | [INFO] [stdout] 4 ~ struct Book<'a> { [INFO] [stdout] 5 | author: &str, [INFO] [stdout] 6 ~ title: &'a str, [INFO] [stdout] | [INFO] [stdout] [INFO] [stdout] [INFO] [stderr] error: could not compile `exercises` (bin "errors3" test) due to 1 previous error [INFO] [stdout] For more information about this error, try `rustc --explain E0106`. [INFO] [stdout] [INFO] [stdout] error[E0282]: type annotations needed for `Vec<_>` [INFO] [stdout] --> exercises/14_generics/generics1.rs:9:9 [INFO] [stdout] | [INFO] [stdout] 9 | let mut numbers = Vec::new(); [INFO] [stdout] | ^^^^^^^^^^^ ---------- type must be known at this point [INFO] [stdout] | [INFO] [stdout] help: consider giving `numbers` an explicit type, where the type for type parameter `T` is specified [INFO] [stdout] | [INFO] [stdout] 9 | let mut numbers: Vec = Vec::new(); [INFO] [stdout] | ++++++++ [INFO] [stdout] [INFO] [stdout] [INFO] [stderr] error: could not compile `exercises` (bin "lifetimes3" test) due to 2 previous errors [INFO] [stdout] error[E0308]: mismatched types [INFO] [stdout] --> exercises/23_conversions/from_into.rs:37:25 [INFO] [stdout] | [INFO] [stdout] 37 | fn from(s: &str) -> Self {} [INFO] [stdout] | ---- ^^^^ expected `Person`, found `()` [INFO] [stdout] | | [INFO] [stdout] | implicitly returns `()` as its body has no tail or `return` expression [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] For more information about this error, try `rustc --explain E0308`. [INFO] [stdout] [INFO] [stderr] error: could not compile `exercises` (bin "from_into" test) due to 1 previous error [INFO] [stdout] For more information about this error, try `rustc --explain E0282`. [INFO] [stdout] [INFO] [stderr] error: could not compile `exercises` (bin "generics1" test) due to 1 previous error [INFO] running `Command { std: "docker" "inspect" "5f4bcd00e32835dceeee6bbe00b181d24bb0dc078ea28e93006d9b400bccebd3", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "5f4bcd00e32835dceeee6bbe00b181d24bb0dc078ea28e93006d9b400bccebd3", kill_on_drop: false }` [INFO] [stdout] 5f4bcd00e32835dceeee6bbe00b181d24bb0dc078ea28e93006d9b400bccebd3