[INFO] cloning repository https://github.com/CorneliaKelinske/rustlings_meetup
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/CorneliaKelinske/rustlings_meetup" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FCorneliaKelinske%2Frustlings_meetup", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FCorneliaKelinske%2Frustlings_meetup'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 96be19ef0ee679fe95a6c0bd18d886cc6e4ac2f1
[INFO] checking CorneliaKelinske/rustlings_meetup against try#87f2ecc56b5f6032b075c8934ebc77f28d57183c for pr-148190
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FCorneliaKelinske%2Frustlings_meetup" "/workspace/builds/worker-2-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-2-tc2/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/CorneliaKelinske/rustlings_meetup
[INFO] finished tweaking git repo https://github.com/CorneliaKelinske/rustlings_meetup
[INFO] tweaked toml for git repo https://github.com/CorneliaKelinske/rustlings_meetup written to /workspace/builds/worker-2-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/CorneliaKelinske/rustlings_meetup on toolchain 87f2ecc56b5f6032b075c8934ebc77f28d57183c
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+87f2ecc56b5f6032b075c8934ebc77f28d57183c" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+87f2ecc56b5f6032b075c8934ebc77f28d57183c" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+87f2ecc56b5f6032b075c8934ebc77f28d57183c" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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@sha256:94a0c148923f5b2b52a63ef0eeb1882ad339ab61bce784c8077cbe41c61feb6c" "/opt/rustwide/cargo-home/bin/cargo" "+87f2ecc56b5f6032b075c8934ebc77f28d57183c" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 40c8ef7c2cd8a8c819631a4a1e3703a2c92ac812792b3582062babf2180faf39
[INFO] running `Command { std: "docker" "start" "-a" "40c8ef7c2cd8a8c819631a4a1e3703a2c92ac812792b3582062babf2180faf39", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "40c8ef7c2cd8a8c819631a4a1e3703a2c92ac812792b3582062babf2180faf39", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "40c8ef7c2cd8a8c819631a4a1e3703a2c92ac812792b3582062babf2180faf39", kill_on_drop: false }`
[INFO] [stdout] 40c8ef7c2cd8a8c819631a4a1e3703a2c92ac812792b3582062babf2180faf39
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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@sha256:94a0c148923f5b2b52a63ef0eeb1882ad339ab61bce784c8077cbe41c61feb6c" "/opt/rustwide/cargo-home/bin/cargo" "+87f2ecc56b5f6032b075c8934ebc77f28d57183c" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 51bcee8ee5248ab4486072c1c0cb350a1d12a76ce3db47d29b7d1d2c9ecac219
[INFO] running `Command { std: "docker" "start" "-a" "51bcee8ee5248ab4486072c1c0cb350a1d12a76ce3db47d29b7d1d2c9ecac219", kill_on_drop: false }`
[INFO] [stderr]     Checking exercises v0.0.0 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0308]: mismatched types
[INFO] [stdout]  --> exercises/03_if/if1.rs:1:30
[INFO] [stdout]   |
[INFO] [stdout] 1 | fn bigger(a: i32, b: i32) -> i32 {
[INFO] [stdout]   |    ------                    ^^^ expected `i32`, found `()`
[INFO] [stdout]   |    |
[INFO] [stdout]   |    implicitly returns `()` as its body has no tail or `return` expression
[INFO] [stdout]   |
[INFO] [stdout] note: consider returning one of these bindings
[INFO] [stdout]  --> exercises/03_if/if1.rs:1:11
[INFO] [stdout]   |
[INFO] [stdout] 1 | fn bigger(a: i32, b: i32) -> i32 {
[INFO] [stdout]   |           ^       ^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0308`.
[INFO] [stdout] 
[INFO] [stdout] error[E0369]: cannot multiply `Result<i32, ParseIntError>` by `{integer}`
[INFO] [stdout]   --> exercises/13_error_handling/errors2.rs:26:12
[INFO] [stdout]    |
[INFO] [stdout] 26 |     Ok(qty * cost_per_item + processing_fee)
[INFO] [stdout]    |        --- ^ ------------- {integer}
[INFO] [stdout]    |        |
[INFO] [stdout]    |        Result<i32, ParseIntError>
[INFO] [stdout]    |
[INFO] [stdout] note: `Result<i32, ParseIntError>` does not implement `Mul<{integer}>`
[INFO] [stdout]   --> /rustc/87f2ecc56b5f6032b075c8934ebc77f28d57183c/library/core/src/result.rs:557:0
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Result<i32, ParseIntError>` is defined in another crate
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0369`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `exercises` (bin "if1" test) due to 1 previous error
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: could not compile `exercises` (bin "errors2") 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 foo_if_fizz(fizzish: &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] For more information about this error, try `rustc --explain E0308`.
[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] [stderr] error: could not compile `exercises` (bin "if2") due to 1 previous error
[INFO] [stdout] error[E0382]: use of moved value: `tx`
[INFO] [stdout]   --> exercises/20_threads/threads3.rs:30:19
[INFO] [stdout]    |
[INFO] [stdout] 19 | fn send_tx(q: Queue, tx: mpsc::Sender<u32>) {
[INFO] [stdout]    |                      -- move occurs because `tx` has type `std::sync::mpsc::Sender<u32>`, which does not implement the `Copy` trait
[INFO] [stdout] ...
[INFO] [stdout] 22 |     thread::spawn(move || {
[INFO] [stdout]    |                   ------- value moved into closure here
[INFO] [stdout] 23 |         for val in q.first_half {
[INFO] [stdout]    |         ----------------------- inside of this loop
[INFO] [stdout] 24 |             println!("Sending {val:?}");
[INFO] [stdout] 25 |             tx.send(val).unwrap();
[INFO] [stdout]    |             -- variable moved due to use in closure
[INFO] [stdout] ...
[INFO] [stdout] 30 |     thread::spawn(move || {
[INFO] [stdout]    |                   ^^^^^^^ value used here after move
[INFO] [stdout] ...
[INFO] [stdout] 33 |             tx.send(val).unwrap();
[INFO] [stdout]    |             -- use occurs due to use in closure
[INFO] [stdout]    |
[INFO] [stdout] help: consider moving the expression out of the loop so it is only moved once
[INFO] [stdout]    |
[INFO] [stdout] 23 ~         let mut value = tx.send(val);
[INFO] [stdout] 24 ~         for val in q.first_half {
[INFO] [stdout] 25 |             println!("Sending {val:?}");
[INFO] [stdout] 26 ~             value.unwrap();
[INFO] [stdout]    |
[INFO] [stdout] help: consider cloning the value before moving it into the closure
[INFO] [stdout]    |
[INFO] [stdout] 22 ~     let value = tx.clone();
[INFO] [stdout] 23 ~     thread::spawn(move || {
[INFO] [stdout] 24 |         for val in q.first_half {
[INFO] [stdout] 25 |             println!("Sending {val:?}");
[INFO] [stdout] 26 ~             value.send(val).unwrap();
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0382`.
[INFO] [stdout] 
[INFO] [stdout] error[E0072]: recursive type `List` has infinite size
[INFO] [stdout]   --> exercises/19_smart_pointers/box1.rs:14:1
[INFO] [stdout]    |
[INFO] [stdout] 14 | enum List {
[INFO] [stdout]    | ^^^^^^^^^
[INFO] [stdout] 15 |     Cons(i32, List),
[INFO] [stdout]    |               ---- recursive without indirection
[INFO] [stdout]    |
[INFO] [stdout] help: insert some indirection (e.g., a `Box`, `Rc`, or `&`) to break the cycle
[INFO] [stdout]    |
[INFO] [stdout] 15 |     Cons(i32, Box<List>),
[INFO] [stdout]    |               ++++    +
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `exercises` (bin "threads3" test) due to 1 previous error
[INFO] [stdout] warning: unused variable: `a`
[INFO] [stdout]   --> exercises/18_iterators/iterators3.rs:13:11
[INFO] [stdout]    |
[INFO] [stdout] 13 | fn divide(a: i64, b: i64) -> Result<i64, DivisionError> {
[INFO] [stdout]    |           ^ help: if this is intentional, prefix it with an underscore: `_a`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `b`
[INFO] [stdout]   --> exercises/18_iterators/iterators3.rs:13:19
[INFO] [stdout]    |
[INFO] [stdout] 13 | fn divide(a: i64, b: i64) -> Result<i64, DivisionError> {
[INFO] [stdout]    |                   ^ help: if this is intentional, prefix it with an underscore: `_b`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `division_results`
[INFO] [stdout]   --> exercises/18_iterators/iterators3.rs:21:9
[INFO] [stdout]    |
[INFO] [stdout] 21 |     let division_results = numbers.into_iter().map(|n| divide(n, 27));
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_division_results`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `division_results`
[INFO] [stdout]   --> exercises/18_iterators/iterators3.rs:28:9
[INFO] [stdout]    |
[INFO] [stdout] 28 |     let division_results = numbers.into_iter().map(|n| divide(n, 27));
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_division_results`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum `DivisionError` is never used
[INFO] [stdout]  --> exercises/18_iterators/iterators3.rs:2:6
[INFO] [stdout]   |
[INFO] [stdout] 2 | enum DivisionError {
[INFO] [stdout]   |      ^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `divide` is never used
[INFO] [stdout]   --> exercises/18_iterators/iterators3.rs:13:4
[INFO] [stdout]    |
[INFO] [stdout] 13 | fn divide(a: i64, b: i64) -> Result<i64, DivisionError> {
[INFO] [stdout]    |    ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `result_with_list` is never used
[INFO] [stdout]   --> exercises/18_iterators/iterators3.rs:19:4
[INFO] [stdout]    |
[INFO] [stdout] 19 | fn result_with_list() {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `list_of_results` is never used
[INFO] [stdout]   --> exercises/18_iterators/iterators3.rs:26:4
[INFO] [stdout]    |
[INFO] [stdout] 26 | fn list_of_results() {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `details` is never used
[INFO] [stdout]   --> exercises/19_smart_pointers/rc1.rs:25:8
[INFO] [stdout]    |
[INFO] [stdout] 24 | impl Planet {
[INFO] [stdout]    | ----------- method in this implementation
[INFO] [stdout] 25 |     fn details(&self) {
[INFO] [stdout]    |        ^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0425]: cannot find value `nice_slice` in this scope
[INFO] [stdout]   --> exercises/04_primitive_types/primitive_types4.rs:14:31
[INFO] [stdout]    |
[INFO] [stdout] 14 |         assert_eq!([2, 3, 4], nice_slice);
[INFO] [stdout]    |                               ^^^^^^^^^^ not found in this scope
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0391]: cycle detected when computing drop-check constraints for `List`
[INFO] [stdout]   --> exercises/19_smart_pointers/box1.rs:14:1
[INFO] [stdout]    |
[INFO] [stdout] 14 | enum List {
[INFO] [stdout]    | ^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: ...which immediately requires computing drop-check constraints for `List` again
[INFO] [stdout]    = note: cycle used when computing dropck types for `List`
[INFO] [stdout]    = note: see https://rustc-dev-guide.rust-lang.org/overview.html#queries and https://rustc-dev-guide.rust-lang.org/query.html for more information
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0391]: cycle detected when computing when `List` needs drop
[INFO] [stdout]   --> exercises/19_smart_pointers/box1.rs:14:1
[INFO] [stdout]    |
[INFO] [stdout] 14 | enum List {
[INFO] [stdout]    | ^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: ...which immediately requires computing when `List` needs drop again
[INFO] [stdout]    = note: cycle used when computing whether `List` needs drop
[INFO] [stdout]    = note: see https://rustc-dev-guide.rust-lang.org/overview.html#queries and https://rustc-dev-guide.rust-lang.org/query.html for more information
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] Some errors have detailed explanations: E0072, E0391.
[INFO] [stdout] 
[INFO] [stdout] For more information about an error, try `rustc --explain E0072`.
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0425`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `exercises` (bin "primitive_types4" test) due to 1 previous error
[INFO] [stderr] error: could not compile `exercises` (bin "box1") due to 3 previous errors
[INFO] running `Command { std: "docker" "inspect" "51bcee8ee5248ab4486072c1c0cb350a1d12a76ce3db47d29b7d1d2c9ecac219", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "51bcee8ee5248ab4486072c1c0cb350a1d12a76ce3db47d29b7d1d2c9ecac219", kill_on_drop: false }`
[INFO] [stdout] 51bcee8ee5248ab4486072c1c0cb350a1d12a76ce3db47d29b7d1d2c9ecac219
