[INFO] cloning repository https://github.com/tweedegolf/rust-workshop-exercises
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/tweedegolf/rust-workshop-exercises" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ftweedegolf%2Frust-workshop-exercises", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ftweedegolf%2Frust-workshop-exercises'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 0ce208b93c4f1dea8ca1f17b67efc555707e891c
[INFO] checking tweedegolf/rust-workshop-exercises against try#df1b9bf194c9183fb7c0604484171064069ce232 for pr-149195-4
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ftweedegolf%2Frust-workshop-exercises" "/workspace/builds/worker-6-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-6-tc2/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/tweedegolf/rust-workshop-exercises
[INFO] finished tweaking git repo https://github.com/tweedegolf/rust-workshop-exercises
[INFO] tweaked toml for git repo https://github.com/tweedegolf/rust-workshop-exercises written to /workspace/builds/worker-6-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/tweedegolf/rust-workshop-exercises on toolchain df1b9bf194c9183fb7c0604484171064069ce232
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+df1b9bf194c9183fb7c0604484171064069ce232" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/tweedegolf/rust-workshop-exercises 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" "+df1b9bf194c9183fb7c0604484171064069ce232" "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-6-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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@sha256:29356a839a4d14451438f794ce8414e707d72405f44418718d724d22562fe786" "/opt/rustwide/cargo-home/bin/cargo" "+df1b9bf194c9183fb7c0604484171064069ce232" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 0cbbe393762b28bba7faa65d06aef291dbfc5de9e5d2550ec01edfcb32bdccd6
[INFO] running `Command { std: "docker" "start" "-a" "0cbbe393762b28bba7faa65d06aef291dbfc5de9e5d2550ec01edfcb32bdccd6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "0cbbe393762b28bba7faa65d06aef291dbfc5de9e5d2550ec01edfcb32bdccd6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "0cbbe393762b28bba7faa65d06aef291dbfc5de9e5d2550ec01edfcb32bdccd6", kill_on_drop: false }`
[INFO] [stdout] 0cbbe393762b28bba7faa65d06aef291dbfc5de9e5d2550ec01edfcb32bdccd6
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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@sha256:29356a839a4d14451438f794ce8414e707d72405f44418718d724d22562fe786" "/opt/rustwide/cargo-home/bin/cargo" "+df1b9bf194c9183fb7c0604484171064069ce232" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] ac5fb6f8436e75e8fc893ffbf02593b72caf5e409f6d51dfd4e3b5bc74f8256c
[INFO] running `Command { std: "docker" "start" "-a" "ac5fb6f8436e75e8fc893ffbf02593b72caf5e409f6d51dfd4e3b5bc74f8256c", kill_on_drop: false }`
[INFO] [stderr]    Compiling ryu v1.0.6
[INFO] [stderr]    Compiling serde v1.0.130
[INFO] [stderr]    Compiling serde_json v1.0.72
[INFO] [stderr]     Checking rust-workshop-exercises v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unnecessary parentheses around `if` condition
[INFO] [stdout]  --> src/bin/02.rs:2:8
[INFO] [stdout]   |
[INFO] [stdout] 2 |     if (bigger(10, 20)) {
[INFO] [stdout]   |        ^              ^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_parens)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]   |
[INFO] [stdout] 2 -     if (bigger(10, 20)) {
[INFO] [stdout] 2 +     if bigger(10, 20)  {
[INFO] [stdout]   |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: 2 positional arguments in format string, but no arguments were given
[INFO] [stdout]  --> src/bin/03.rs:6:15
[INFO] [stdout]   |
[INFO] [stdout] 6 |     println!("{} is largest and {} is smallest");
[INFO] [stdout]   |               ^^                ^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `input`
[INFO] [stdout]  --> src/bin/03.rs:2:9
[INFO] [stdout]   |
[INFO] [stdout] 2 |     let input = [23, 82, 16, 45, 21, 94, 12, 34];
[INFO] [stdout]   |         ^^^^^ help: if this is intentional, prefix it with an underscore: `_input`
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0609]: no field `i` on type `[{integer}; 5]`
[INFO] [stdout]  --> src/bin/05.rs:4:29
[INFO] [stdout]   |
[INFO] [stdout] 4 |         half_even(&mut data.i);
[INFO] [stdout]   |                             ^ unknown field
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: unexpected parentheses surrounding `for` loop head
[INFO] [stdout]  --> src/bin/04.rs:2:9
[INFO] [stdout]   |
[INFO] [stdout] 2 |     for (n in [10, 20, 30, 40]) {
[INFO] [stdout]   |         ^                     ^
[INFO] [stdout]   |
[INFO] [stdout] help: remove parentheses in `for` loop
[INFO] [stdout]   |
[INFO] [stdout] 2 -     for (n in [10, 20, 30, 40]) {
[INFO] [stdout] 2 +     for n in [10, 20, 30, 40] {
[INFO] [stdout]   |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0277]: `()` doesn't implement `std::fmt::Display`
[INFO] [stdout]  --> src/bin/01.rs:2:20
[INFO] [stdout]   |
[INFO] [stdout] 2 |     println!("{}", multiply(10, 20));
[INFO] [stdout]   |               --   ^^^^^^^^^^^^^^^^ `()` cannot be formatted with the default formatter
[INFO] [stdout]   |               |
[INFO] [stdout]   |               required by this formatting parameter
[INFO] [stdout]   |
[INFO] [stdout]   = help: the trait `std::fmt::Display` is not implemented for `()`
[INFO] [stdout]   = note: in format strings you may be able to use `{:?}` (or {:#?} for pretty-print) instead
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: 2 positional arguments in format string, but no arguments were given
[INFO] [stdout]  --> src/bin/03.rs:6:15
[INFO] [stdout]   |
[INFO] [stdout] 6 |     println!("{} is largest and {} is smallest");
[INFO] [stdout]   |               ^^                ^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `rust-workshop-exercises` (bin "03") due to 1 previous error; 1 warning emitted
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stdout] error[E0609]: no field `i` on type `[{integer}; 5]`
[INFO] [stdout]  --> src/bin/05.rs:4:29
[INFO] [stdout]   |
[INFO] [stdout] 4 |         half_even(&mut data.i);
[INFO] [stdout]   |                             ^ unknown field
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `rust-workshop-exercises` (bin "05" test) due to 2 previous errors
[INFO] [stdout] error[E0308]: mismatched types
[INFO] [stdout]  --> src/bin/02.rs:2:8
[INFO] [stdout]   |
[INFO] [stdout] 2 |     if (bigger(10, 20)) {
[INFO] [stdout]   |        ^^^^^^^^^^^^^^^^ expected `bool`, found `i32`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `rust-workshop-exercises` (bin "03" test) due to 1 previous error; 1 warning emitted
[INFO] [stdout] error[E0594]: cannot assign to `*data`, which is behind a `&` reference
[INFO] [stdout]  --> src/bin/05.rs:9:5
[INFO] [stdout]   |
[INFO] [stdout] 9 |     *data = data / 2
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^ `data` is a `&` reference, so it cannot be written to
[INFO] [stdout]   |
[INFO] [stdout] help: consider changing this to be a mutable reference
[INFO] [stdout]   |
[INFO] [stdout] 8 | fn half_even(data: &mut i32) {
[INFO] [stdout]   |                     +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `rust-workshop-exercises` (bin "05") due to 2 previous errors
[INFO] [stdout] error[E0308]: mismatched types
[INFO] [stdout]  --> src/bin/02.rs:9:30
[INFO] [stdout]   |
[INFO] [stdout] 9 | 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]  --> src/bin/02.rs:9:11
[INFO] [stdout]   |
[INFO] [stdout] 9 | fn bigger(a: i32, b: i32) -> i32 {
[INFO] [stdout]   |           ^       ^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0594]: cannot assign to `*data`, which is behind a `&` reference
[INFO] [stdout]  --> src/bin/05.rs:9:5
[INFO] [stdout]   |
[INFO] [stdout] 9 |     *data = data / 2
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^ `data` is a `&` reference, so it cannot be written to
[INFO] [stdout]   |
[INFO] [stdout] help: consider changing this to be a mutable reference
[INFO] [stdout]   |
[INFO] [stdout] 8 | fn half_even(data: &mut i32) {
[INFO] [stdout]   |                     +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] Some errors have detailed explanations: E0594, E0609.
[INFO] [stdout] 
[INFO] [stdout] For more information about an error, try `rustc --explain E0594`.
[INFO] [stdout] 
[INFO] [stdout] Some errors have detailed explanations: E0594, E0609.
[INFO] [stdout] 
[INFO] [stdout] For more information about an error, try `rustc --explain E0594`.
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0308`.
[INFO] [stdout] 
[INFO] [stdout] error[E0308]: mismatched types
[INFO] [stdout]  --> src/bin/01.rs:6:5
[INFO] [stdout]   |
[INFO] [stdout] 5 | fn multiply(a: i32, b: i32) {
[INFO] [stdout]   |                            - help: try adding a return type: `-> i32`
[INFO] [stdout] 6 |     a * b
[INFO] [stdout]   |     ^^^^^ expected `()`, found `i32`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `input`
[INFO] [stdout]  --> src/bin/03.rs:2:9
[INFO] [stdout]   |
[INFO] [stdout] 2 |     let input = [23, 82, 16, 45, 21, 94, 12, 34];
[INFO] [stdout]   |         ^^^^^ help: if this is intentional, prefix it with an underscore: `_input`
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: unexpected parentheses surrounding `for` loop head
[INFO] [stdout]  --> src/bin/04.rs:2:9
[INFO] [stdout]   |
[INFO] [stdout] 2 |     for (n in [10, 20, 30, 40]) {
[INFO] [stdout]   |         ^                     ^
[INFO] [stdout]   |
[INFO] [stdout] help: remove parentheses in `for` loop
[INFO] [stdout]   |
[INFO] [stdout] 2 -     for (n in [10, 20, 30, 40]) {
[INFO] [stdout] 2 +     for n in [10, 20, 30, 40] {
[INFO] [stdout]   |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0308]: mismatched types
[INFO] [stdout]   --> src/bin/01.rs:15:37
[INFO] [stdout]    |
[INFO] [stdout] 15 |         assert!(multiply(10, 10) == 100);
[INFO] [stdout]    |                 ----------------    ^^^ expected `()`, found integer
[INFO] [stdout]    |                 |
[INFO] [stdout]    |                 expected because this is `()`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0308]: mismatched types
[INFO] [stdout]   --> src/bin/01.rs:16:35
[INFO] [stdout]    |
[INFO] [stdout] 16 |         assert!(multiply(2, 2) == 4);
[INFO] [stdout]    |                 --------------    ^ expected `()`, found integer
[INFO] [stdout]    |                 |
[INFO] [stdout]    |                 expected because this is `()`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] Some errors have detailed explanations: E0277, E0308.
[INFO] [stdout] 
[INFO] [stdout] For more information about an error, try `rustc --explain E0277`.
[INFO] [stdout] 
[INFO] [stdout] error[E0425]: cannot find value `n` in this scope
[INFO] [stdout]  --> src/bin/04.rs:3:23
[INFO] [stdout]   |
[INFO] [stdout] 3 |         let mult = if n < 25 {
[INFO] [stdout]   |                       ^ not found in this scope
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0425]: cannot find value `n` in this scope
[INFO] [stdout]  --> src/bin/04.rs:4:13
[INFO] [stdout]   |
[INFO] [stdout] 4 |             n * 4
[INFO] [stdout]   |             ^ not found in this scope
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0425]: cannot find value `n` in this scope
[INFO] [stdout]  --> src/bin/04.rs:6:13
[INFO] [stdout]   |
[INFO] [stdout] 6 |             n * 3;
[INFO] [stdout]   |             ^ not found in this scope
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0425]: cannot find function `bigger` in this scope
[INFO] [stdout]   --> src/bin/02.rs:19:17
[INFO] [stdout]    |
[INFO] [stdout] 19 |         assert!(bigger(20, 10));
[INFO] [stdout]    |                 ^^^^^^ not found in this scope
[INFO] [stdout]    |
[INFO] [stdout] help: consider importing this function
[INFO] [stdout]    |
[INFO] [stdout] 17 +     use crate::bigger;
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0425]: cannot find function `bigger` in this scope
[INFO] [stdout]   --> src/bin/02.rs:20:18
[INFO] [stdout]    |
[INFO] [stdout] 20 |         assert!(!bigger(10, 20));
[INFO] [stdout]    |                  ^^^^^^ not found in this scope
[INFO] [stdout]    |
[INFO] [stdout] help: consider importing this function
[INFO] [stdout]    |
[INFO] [stdout] 17 +     use crate::bigger;
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0425`.
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around `if` condition
[INFO] [stdout]  --> src/bin/02.rs:2:8
[INFO] [stdout]   |
[INFO] [stdout] 2 |     if (bigger(10, 20)) {
[INFO] [stdout]   |        ^              ^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_parens)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]   |
[INFO] [stdout] 2 -     if (bigger(10, 20)) {
[INFO] [stdout] 2 +     if bigger(10, 20)  {
[INFO] [stdout]   |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `rust-workshop-exercises` (bin "02") due to 2 previous errors; 1 warning emitted
[INFO] [stdout] error[E0425]: cannot find value `n` in this scope
[INFO] [stdout]  --> src/bin/04.rs:3:23
[INFO] [stdout]   |
[INFO] [stdout] 3 |         let mult = if n < 25 {
[INFO] [stdout]   |                       ^ not found in this scope
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0425]: cannot find value `n` in this scope
[INFO] [stdout]  --> src/bin/04.rs:4:13
[INFO] [stdout]   |
[INFO] [stdout] 4 |             n * 4
[INFO] [stdout]   |             ^ not found in this scope
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0425]: cannot find value `n` in this scope
[INFO] [stdout]  --> src/bin/04.rs:6:13
[INFO] [stdout]   |
[INFO] [stdout] 6 |             n * 3;
[INFO] [stdout]   |             ^ not found in this scope
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `rust-workshop-exercises` (bin "01" test) due to 4 previous errors
[INFO] [stdout] For more information about this error, try `rustc --explain E0425`.
[INFO] [stdout] 
[INFO] [stdout] error[E0308]: mismatched types
[INFO] [stdout]  --> src/bin/02.rs:2:8
[INFO] [stdout]   |
[INFO] [stdout] 2 |     if (bigger(10, 20)) {
[INFO] [stdout]   |        ^^^^^^^^^^^^^^^^ expected `bool`, found `i32`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0308]: mismatched types
[INFO] [stdout]  --> src/bin/02.rs:9:30
[INFO] [stdout]   |
[INFO] [stdout] 9 | 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]  --> src/bin/02.rs:9:11
[INFO] [stdout]   |
[INFO] [stdout] 9 | fn bigger(a: i32, b: i32) -> i32 {
[INFO] [stdout]   |           ^       ^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] Some errors have detailed explanations: E0308, E0425.
[INFO] [stdout] 
[INFO] [stdout] For more information about an error, try `rustc --explain E0308`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `rust-workshop-exercises` (bin "02" test) due to 4 previous errors; 1 warning emitted
[INFO] [stderr] error: could not compile `rust-workshop-exercises` (bin "04" test) due to 4 previous errors
[INFO] [stderr] error: could not compile `rust-workshop-exercises` (bin "04") due to 4 previous errors
[INFO] [stdout] error[E0277]: `()` doesn't implement `std::fmt::Display`
[INFO] [stdout]  --> src/bin/01.rs:2:20
[INFO] [stdout]   |
[INFO] [stdout] 2 |     println!("{}", multiply(10, 20));
[INFO] [stdout]   |               --   ^^^^^^^^^^^^^^^^ `()` cannot be formatted with the default formatter
[INFO] [stdout]   |               |
[INFO] [stdout]   |               required by this formatting parameter
[INFO] [stdout]   |
[INFO] [stdout]   = help: the trait `std::fmt::Display` is not implemented for `()`
[INFO] [stdout]   = note: in format strings you may be able to use `{:?}` (or {:#?} for pretty-print) instead
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0308]: mismatched types
[INFO] [stdout]  --> src/bin/01.rs:6:5
[INFO] [stdout]   |
[INFO] [stdout] 5 | fn multiply(a: i32, b: i32) {
[INFO] [stdout]   |                            - help: try adding a return type: `-> i32`
[INFO] [stdout] 6 |     a * b
[INFO] [stdout]   |     ^^^^^ expected `()`, found `i32`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] Some errors have detailed explanations: E0277, E0308.
[INFO] [stdout] 
[INFO] [stdout] For more information about an error, try `rustc --explain E0277`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `rust-workshop-exercises` (bin "01") due to 2 previous errors
[INFO] running `Command { std: "docker" "inspect" "ac5fb6f8436e75e8fc893ffbf02593b72caf5e409f6d51dfd4e3b5bc74f8256c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ac5fb6f8436e75e8fc893ffbf02593b72caf5e409f6d51dfd4e3b5bc74f8256c", kill_on_drop: false }`
[INFO] [stdout] ac5fb6f8436e75e8fc893ffbf02593b72caf5e409f6d51dfd4e3b5bc74f8256c