[INFO] cloning repository https://github.com/romnn/par-dfs
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/romnn/par-dfs" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fromnn%2Fpar-dfs", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fromnn%2Fpar-dfs'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 6e69678ab1cbda48f2d51da14eea81d043630477
[INFO] checking romnn/par-dfs against try#4f260f0f20b3133d20cfb50353c0221943af5796+rustflags=-Dunmustuse_in_always_ok for pr-148577
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fromnn%2Fpar-dfs" "/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/romnn/par-dfs
[INFO] removed 0 missing examples
[INFO] finished tweaking git repo https://github.com/romnn/par-dfs
[INFO] tweaked toml for git repo https://github.com/romnn/par-dfs written to /workspace/builds/worker-2-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/romnn/par-dfs on toolchain 4f260f0f20b3133d20cfb50353c0221943af5796
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+4f260f0f20b3133d20cfb50353c0221943af5796" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/romnn/par-dfs 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" "+4f260f0f20b3133d20cfb50353c0221943af5796" "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-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@sha256:4848fb76d95f26979359cc7e45710b1dbc8f3acb7aeedee7c460d7702230f228" "/opt/rustwide/cargo-home/bin/cargo" "+4f260f0f20b3133d20cfb50353c0221943af5796" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 56713dfd2eb24cb3c7c6c14fbeb55f2eec6888b1330bede0cd0d6894a56d3450
[INFO] running `Command { std: "docker" "start" "-a" "56713dfd2eb24cb3c7c6c14fbeb55f2eec6888b1330bede0cd0d6894a56d3450", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "56713dfd2eb24cb3c7c6c14fbeb55f2eec6888b1330bede0cd0d6894a56d3450", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "56713dfd2eb24cb3c7c6c14fbeb55f2eec6888b1330bede0cd0d6894a56d3450", kill_on_drop: false }`
[INFO] [stdout] 56713dfd2eb24cb3c7c6c14fbeb55f2eec6888b1330bede0cd0d6894a56d3450
[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 -Dunmustuse_in_always_ok" "-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@sha256:4848fb76d95f26979359cc7e45710b1dbc8f3acb7aeedee7c460d7702230f228" "/opt/rustwide/cargo-home/bin/cargo" "+4f260f0f20b3133d20cfb50353c0221943af5796" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] cdac5bc967b8efa8bfc56a380608fd03f4942435a37db4f130029add98c563bd
[INFO] running `Command { std: "docker" "start" "-a" "cdac5bc967b8efa8bfc56a380608fd03f4942435a37db4f130029add98c563bd", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.92
[INFO] [stderr]     Checking futures-sink v0.3.31
[INFO] [stderr]    Compiling serde v1.0.217
[INFO] [stderr]    Compiling num-traits v0.2.19
[INFO] [stderr]    Compiling serde_json v1.0.134
[INFO] [stderr]     Checking once_cell v1.20.2
[INFO] [stderr]     Checking half v2.4.1
[INFO] [stderr]     Checking regex-syntax v0.8.5
[INFO] [stderr]     Checking itoa v1.0.14
[INFO] [stderr]     Checking ciborium-io v0.2.2
[INFO] [stderr]     Checking plotters-backend v0.3.7
[INFO] [stderr]     Checking clap_builder v4.5.23
[INFO] [stderr]     Checking similar v2.6.0
[INFO] [stderr]     Checking itertools v0.10.5
[INFO] [stderr]     Checking rayon v1.10.0
[INFO] [stderr]     Checking cast v0.3.0
[INFO] [stderr]     Checking futures-channel v0.3.31
[INFO] [stderr]    Compiling anyhow v1.0.95
[INFO] [stderr]     Checking is-terminal v0.4.13
[INFO] [stderr]     Checking console v0.15.10
[INFO] [stderr]     Checking oorandom v11.1.4
[INFO] [stderr]     Checking anes v0.1.6
[INFO] [stderr]     Checking plotters-svg v0.3.7
[INFO] [stderr]     Checking ciborium-ll v0.2.2
[INFO] [stderr]     Checking plotters v0.3.7
[INFO] [stderr]     Checking regex-automata v0.4.9
[INFO] [stderr]     Checking similar-asserts v1.6.0
[INFO] [stderr]    Compiling quote v1.0.38
[INFO] [stderr]    Compiling syn v2.0.94
[INFO] [stderr]     Checking criterion-plot v0.5.0
[INFO] [stderr]     Checking regex v1.11.1
[INFO] [stderr]    Compiling futures-macro v0.3.31
[INFO] [stderr]    Compiling serde_derive v1.0.217
[INFO] [stderr]    Compiling pin-project-internal v1.1.7
[INFO] [stderr]    Compiling tokio-macros v2.4.0
[INFO] [stderr]    Compiling thiserror-impl v2.0.9
[INFO] [stderr]    Compiling async-trait v0.1.83
[INFO] [stderr]    Compiling clap_derive v4.5.18
[INFO] [stderr]    Compiling async-stream-impl v0.3.6
[INFO] [stderr]     Checking async-stream v0.3.6
[INFO] [stderr]     Checking tokio v1.42.0
[INFO] [stderr]     Checking futures-util v0.3.31
[INFO] [stderr]     Checking pin-project v1.1.7
[INFO] [stderr]     Checking thiserror v2.0.9
[INFO] [stderr]     Checking clap v4.5.23
[INFO] [stderr]     Checking tokio-stream v0.1.17
[INFO] [stderr]     Checking tokio-test v0.4.4
[INFO] [stderr]     Checking futures-executor v0.3.31
[INFO] [stderr]     Checking futures v0.3.31
[INFO] [stderr]     Checking par-dfs v0.0.7 (/opt/rustwide/workdir)
[INFO] [stderr]     Checking collatz-dfs v0.1.0 (/opt/rustwide/workdir/crates/collatz-dfs)
[INFO] [stdout] error: this type will no longer be must used: Result<u32, Infallible>
[INFO] [stdout]    --> crates/collatz-dfs/src/lib.rs:121:40
[INFO] [stdout]     |
[INFO] [stdout] 121 |             queue: VecDeque::from_iter([(0, Ok(start))]),
[INFO] [stdout]     |                                        ^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: requested on the command line with `-D unmustuse-in-always-ok`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<u32, Infallible>
[INFO] [stdout]    --> crates/collatz-dfs/src/lib.rs:121:45
[INFO] [stdout]     |
[INFO] [stdout] 121 |             queue: VecDeque::from_iter([(0, Ok(start))]),
[INFO] [stdout]     |                                             ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<u32, Infallible>
[INFO] [stdout]    --> crates/collatz-dfs/src/lib.rs:139:37
[INFO] [stdout]     |
[INFO] [stdout] 139 |                         return Some(Ok(n));
[INFO] [stdout]     |                                     ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<u32, Infallible>
[INFO] [stdout]    --> crates/collatz-dfs/src/lib.rs:146:58
[INFO] [stdout]     |
[INFO] [stdout] 146 |                         self.queue.push_back((depth + 1, Ok(even)));
[INFO] [stdout]     |                                                          ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<u32, Infallible>
[INFO] [stdout]    --> crates/collatz-dfs/src/lib.rs:154:58
[INFO] [stdout]     |
[INFO] [stdout] 154 |                         self.queue.push_back((depth + 1, Ok(odd)));
[INFO] [stdout]     |                                                          ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<u32, Infallible>
[INFO] [stdout]    --> crates/collatz-dfs/src/lib.rs:157:22
[INFO] [stdout]     |
[INFO] [stdout] 157 |                 Some(Ok(n))
[INFO] [stdout]     |                      ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<u32, Infallible>
[INFO] [stdout]    --> crates/collatz-dfs/src/lib.rs:159:34
[INFO] [stdout]     |
[INFO] [stdout] 159 |             Some((_, n)) => Some(n),
[INFO] [stdout]     |                                  ^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<CollatzNode, Infallible>
[INFO] [stdout]   --> crates/collatz-dfs/src/lib.rs:62:27
[INFO] [stdout]    |
[INFO] [stdout] 62 |                 queue.add(Ok(Self(even)));
[INFO] [stdout]    |                           ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<CollatzNode, Infallible>
[INFO] [stdout]   --> crates/collatz-dfs/src/lib.rs:67:27
[INFO] [stdout]    |
[INFO] [stdout] 67 |                 queue.add(Ok(Self((n - 1) / 3)));
[INFO] [stdout]    |                           ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: this type continue be must used: Result<Box<dyn Iterator<Item = Result<CollatzNode, Infallible>>>, Infallible>
[INFO] [stdout]   --> crates/collatz-dfs/src/lib.rs:77:74
[INFO] [stdout]    |
[INFO] [stdout] 77 |           fn children(&self, _depth: usize) -> NodeIter<Self, Self::Error> {
[INFO] [stdout]    |  __________________________________________________________________________^
[INFO] [stdout] 78 | |             Ok(Box::new(self.collatz_children()))
[INFO] [stdout] 79 | |         }
[INFO] [stdout]    | |_________^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(mustuse_in_always_ok)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: this type continue be must used: Result<Box<dyn Iterator<Item = Result<CollatzNode, Infallible>>>, Infallible>
[INFO] [stdout]   --> crates/collatz-dfs/src/lib.rs:78:13
[INFO] [stdout]    |
[INFO] [stdout] 78 |             Ok(Box::new(self.collatz_children()))
[INFO] [stdout]    |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: this type continue be must used: Result<Pin<Box<dyn Stream<Item = Result<CollatzNode, Infallible>> + std::marker::Send + Unpin>>, Infallible>
[INFO] [stdout]    --> crates/collatz-dfs/src/lib.rs:97:65
[INFO] [stdout]     |
[INFO] [stdout]  97 |           ) -> Result<NodeStream<Self, Self::Error>, Self::Error> {
[INFO] [stdout]     |  _________________________________________________________________^
[INFO] [stdout]  98 | |             let stream = futures::stream::iter(self.collatz_children()).boxed();
[INFO] [stdout]  99 | |             Ok(Box::pin(stream))
[INFO] [stdout] 100 | |         }
[INFO] [stdout]     | |_________^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: this type continue be must used: Result<Pin<Box<dyn Stream<Item = Result<CollatzNode, Infallible>> + std::marker::Send + Unpin>>, Infallible>
[INFO] [stdout]   --> crates/collatz-dfs/src/lib.rs:89:5
[INFO] [stdout]    |
[INFO] [stdout] 89 |     #[async_trait::async_trait]
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this warning originates in the attribute macro `async_trait::async_trait` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: this type continue be must used: Result<Pin<Box<dyn Stream<Item = Result<CollatzNode, Infallible>> + std::marker::Send + Unpin>>, Infallible>
[INFO] [stdout]   --> crates/collatz-dfs/src/lib.rs:99:13
[INFO] [stdout]    |
[INFO] [stdout] 99 |             Ok(Box::pin(stream))
[INFO] [stdout]    |             ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<CollatzNode, Infallible>
[INFO] [stdout]    --> crates/collatz-dfs/src/lib.rs:198:26
[INFO] [stdout]     |
[INFO] [stdout] 198 |                 .map(|n| n.ok().map(Into::into))
[INFO] [stdout]     |                          ^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<u32, Infallible>
[INFO] [stdout]    --> crates/collatz-dfs/src/lib.rs:121:40
[INFO] [stdout]     |
[INFO] [stdout] 121 |             queue: VecDeque::from_iter([(0, Ok(start))]),
[INFO] [stdout]     |                                        ^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: requested on the command line with `-D unmustuse-in-always-ok`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<u32, Infallible>
[INFO] [stdout]    --> crates/collatz-dfs/src/lib.rs:121:45
[INFO] [stdout]     |
[INFO] [stdout] 121 |             queue: VecDeque::from_iter([(0, Ok(start))]),
[INFO] [stdout]     |                                             ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<u32, Infallible>
[INFO] [stdout]    --> crates/collatz-dfs/src/lib.rs:139:37
[INFO] [stdout]     |
[INFO] [stdout] 139 |                         return Some(Ok(n));
[INFO] [stdout]     |                                     ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<u32, Infallible>
[INFO] [stdout]    --> crates/collatz-dfs/src/lib.rs:146:58
[INFO] [stdout]     |
[INFO] [stdout] 146 |                         self.queue.push_back((depth + 1, Ok(even)));
[INFO] [stdout]     |                                                          ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<u32, Infallible>
[INFO] [stdout]    --> crates/collatz-dfs/src/lib.rs:154:58
[INFO] [stdout]     |
[INFO] [stdout] 154 |                         self.queue.push_back((depth + 1, Ok(odd)));
[INFO] [stdout]     |                                                          ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<u32, Infallible>
[INFO] [stdout]    --> crates/collatz-dfs/src/lib.rs:157:22
[INFO] [stdout]     |
[INFO] [stdout] 157 |                 Some(Ok(n))
[INFO] [stdout]     |                      ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<u32, Infallible>
[INFO] [stdout]    --> crates/collatz-dfs/src/lib.rs:159:34
[INFO] [stdout]     |
[INFO] [stdout] 159 |             Some((_, n)) => Some(n),
[INFO] [stdout]     |                                  ^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<CollatzNode, Infallible>
[INFO] [stdout]   --> crates/collatz-dfs/src/lib.rs:62:27
[INFO] [stdout]    |
[INFO] [stdout] 62 |                 queue.add(Ok(Self(even)));
[INFO] [stdout]    |                           ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<CollatzNode, Infallible>
[INFO] [stdout]   --> crates/collatz-dfs/src/lib.rs:67:27
[INFO] [stdout]    |
[INFO] [stdout] 67 |                 queue.add(Ok(Self((n - 1) / 3)));
[INFO] [stdout]    |                           ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: this type continue be must used: Result<Box<dyn Iterator<Item = Result<CollatzNode, Infallible>>>, Infallible>
[INFO] [stdout]   --> crates/collatz-dfs/src/lib.rs:77:74
[INFO] [stdout]    |
[INFO] [stdout] 77 |           fn children(&self, _depth: usize) -> NodeIter<Self, Self::Error> {
[INFO] [stdout]    |  __________________________________________________________________________^
[INFO] [stdout] 78 | |             Ok(Box::new(self.collatz_children()))
[INFO] [stdout] 79 | |         }
[INFO] [stdout]    | |_________^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(mustuse_in_always_ok)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: this type continue be must used: Result<Box<dyn Iterator<Item = Result<CollatzNode, Infallible>>>, Infallible>
[INFO] [stdout]   --> crates/collatz-dfs/src/lib.rs:78:13
[INFO] [stdout]    |
[INFO] [stdout] 78 |             Ok(Box::new(self.collatz_children()))
[INFO] [stdout]    |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: this type continue be must used: Result<Pin<Box<dyn Stream<Item = Result<CollatzNode, Infallible>> + std::marker::Send + Unpin>>, Infallible>
[INFO] [stdout]    --> crates/collatz-dfs/src/lib.rs:97:65
[INFO] [stdout]     |
[INFO] [stdout]  97 |           ) -> Result<NodeStream<Self, Self::Error>, Self::Error> {
[INFO] [stdout]     |  _________________________________________________________________^
[INFO] [stdout]  98 | |             let stream = futures::stream::iter(self.collatz_children()).boxed();
[INFO] [stdout]  99 | |             Ok(Box::pin(stream))
[INFO] [stdout] 100 | |         }
[INFO] [stdout]     | |_________^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: this type continue be must used: Result<Pin<Box<dyn Stream<Item = Result<CollatzNode, Infallible>> + std::marker::Send + Unpin>>, Infallible>
[INFO] [stdout]   --> crates/collatz-dfs/src/lib.rs:89:5
[INFO] [stdout]    |
[INFO] [stdout] 89 |     #[async_trait::async_trait]
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this warning originates in the attribute macro `async_trait::async_trait` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: this type continue be must used: Result<Pin<Box<dyn Stream<Item = Result<CollatzNode, Infallible>> + std::marker::Send + Unpin>>, Infallible>
[INFO] [stdout]   --> crates/collatz-dfs/src/lib.rs:99:13
[INFO] [stdout]    |
[INFO] [stdout] 99 |             Ok(Box::pin(stream))
[INFO] [stdout]    |             ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `collatz-dfs` (lib test) due to 10 previous errors; 5 warnings emitted
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: could not compile `collatz-dfs` (lib) due to 9 previous errors; 5 warnings emitted
[INFO] running `Command { std: "docker" "inspect" "cdac5bc967b8efa8bfc56a380608fd03f4942435a37db4f130029add98c563bd", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "cdac5bc967b8efa8bfc56a380608fd03f4942435a37db4f130029add98c563bd", kill_on_drop: false }`
[INFO] [stdout] cdac5bc967b8efa8bfc56a380608fd03f4942435a37db4f130029add98c563bd
