[INFO] fetching crate maelstrom-util 0.14.0...
[INFO] checking maelstrom-util-0.14.0 against try#4f260f0f20b3133d20cfb50353c0221943af5796+rustflags=-Dunmustuse_in_always_ok for pr-148577
[INFO] extracting crate maelstrom-util 0.14.0 into /workspace/builds/worker-0-tc2/source
[INFO] started tweaking crates.io crate maelstrom-util 0.14.0
[INFO] finished tweaking crates.io crate maelstrom-util 0.14.0
[INFO] tweaked toml for crates.io crate maelstrom-util 0.14.0 written to /workspace/builds/worker-0-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate maelstrom-util 0.14.0 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 crates.io crate maelstrom-util 0.14.0 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] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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] c28ff3bade5cdd1ff2b625ff7278de8bdf37333b7429e0809e9c78ba2b787898
[INFO] running `Command { std: "docker" "start" "-a" "c28ff3bade5cdd1ff2b625ff7278de8bdf37333b7429e0809e9c78ba2b787898", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "c28ff3bade5cdd1ff2b625ff7278de8bdf37333b7429e0809e9c78ba2b787898", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c28ff3bade5cdd1ff2b625ff7278de8bdf37333b7429e0809e9c78ba2b787898", kill_on_drop: false }`
[INFO] [stdout] c28ff3bade5cdd1ff2b625ff7278de8bdf37333b7429e0809e9c78ba2b787898
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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] bde73d4e7790ce392a52b36cbc551372367b49fa294c05e11c2c21e4230ecec3
[INFO] running `Command { std: "docker" "start" "-a" "bde73d4e7790ce392a52b36cbc551372367b49fa294c05e11c2c21e4230ecec3", kill_on_drop: false }`
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[INFO] [stdout] warning: unnecessary parentheses around type
[INFO] [stdout]    --> src/net.rs:100:17
[INFO] [stdout]     |
[INFO] [stdout] 100 |     mut socket: (impl AsyncWrite + Unpin),
[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] 100 -     mut socket: (impl AsyncWrite + Unpin),
[INFO] [stdout] 100 +     mut socket: impl AsyncWrite + Unpin,
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around type
[INFO] [stdout]    --> src/net.rs:119:17
[INFO] [stdout]     |
[INFO] [stdout] 119 |     mut socket: (impl AsyncRead + Unpin),
[INFO] [stdout]     |                 ^                      ^
[INFO] [stdout]     |
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]     |
[INFO] [stdout] 119 -     mut socket: (impl AsyncRead + Unpin),
[INFO] [stdout] 119 +     mut socket: impl AsyncRead + Unpin,
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around type
[INFO] [stdout]    --> src/net.rs:100:17
[INFO] [stdout]     |
[INFO] [stdout] 100 |     mut socket: (impl AsyncWrite + Unpin),
[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] 100 -     mut socket: (impl AsyncWrite + Unpin),
[INFO] [stdout] 100 +     mut socket: impl AsyncWrite + Unpin,
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around type
[INFO] [stdout]    --> src/net.rs:119:17
[INFO] [stdout]     |
[INFO] [stdout] 119 |     mut socket: (impl AsyncRead + Unpin),
[INFO] [stdout]     |                 ^                      ^
[INFO] [stdout]     |
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]     |
[INFO] [stdout] 119 -     mut socket: (impl AsyncRead + Unpin),
[INFO] [stdout] 119 +     mut socket: impl AsyncRead + Unpin,
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]    --> src/cache/fs/test.rs:858:20
[INFO] [stdout]     |
[INFO] [stdout] 858 |     fn lookup_leaf(&self, path: &Path) -> Result<FollowSymlinks> {
[INFO] [stdout]     |                    ^^^^^                         ^^^^^^^^^^^^^^ the same lifetime is hidden here
[INFO] [stdout]     |                    |
[INFO] [stdout]     |                    the lifetime is elided here
[INFO] [stdout]     |
[INFO] [stdout]     = help: the same lifetime is referred to in inconsistent ways, making the signature confusing
[INFO] [stdout]     = note: `#[warn(mismatched_lifetime_syntaxes)]` on by default
[INFO] [stdout] help: use `'_` for type paths
[INFO] [stdout]     |
[INFO] [stdout] 858 |     fn lookup_leaf(&self, path: &Path) -> Result<FollowSymlinks<'_>> {
[INFO] [stdout]     |                                                                ++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]    --> src/fs.rs:385:33
[INFO] [stdout]     |
[INFO] [stdout] 385 |     pub fn walk<P: AsRef<Path>>(&self, path: P) -> Walker {
[INFO] [stdout]     |                                 ^^^^^              ^^^^^^ the same lifetime is hidden here
[INFO] [stdout]     |                                 |
[INFO] [stdout]     |                                 the lifetime is elided here
[INFO] [stdout]     |
[INFO] [stdout]     = help: the same lifetime is referred to in inconsistent ways, making the signature confusing
[INFO] [stdout] help: use `'_` for type paths
[INFO] [stdout]     |
[INFO] [stdout] 385 |     pub fn walk<P: AsRef<Path>>(&self, path: P) -> Walker<'_> {
[INFO] [stdout]     |                                                          ++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: std::result::Result<RootBuf<T>, Infallible>
[INFO] [stdout]    --> src/root.rs:137:57
[INFO] [stdout]     |
[INFO] [stdout] 137 |       fn from_str(value: &str) -> Result<Self, Self::Err> {
[INFO] [stdout]     |  _________________________________________________________^
[INFO] [stdout] 138 | |         Ok(Self::new(PathBuf::from_str(value)?))
[INFO] [stdout] 139 | |     }
[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: std::result::Result<RootBuf<T>, Infallible>
[INFO] [stdout]    --> src/root.rs:138:9
[INFO] [stdout]     |
[INFO] [stdout] 138 |         Ok(Self::new(PathBuf::from_str(value)?))
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: ControlFlow<std::result::Result<Infallible, Infallible>, PathBuf>
[INFO] [stdout]    --> src/root.rs:138:22
[INFO] [stdout]     |
[INFO] [stdout] 138 |         Ok(Self::new(PathBuf::from_str(value)?))
[INFO] [stdout]     |                      ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: std::result::Result<PathBuf, Infallible>
[INFO] [stdout]    --> src/root.rs:138:22
[INFO] [stdout]     |
[INFO] [stdout] 138 |         Ok(Self::new(PathBuf::from_str(value)?))
[INFO] [stdout]     |                      ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: std::result::Result<RootBuf<T>, Infallible>
[INFO] [stdout]    --> src/root.rs:138:22
[INFO] [stdout]     |
[INFO] [stdout] 138 |         Ok(Self::new(PathBuf::from_str(value)?))
[INFO] [stdout]     |                      ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: std::result::Result<RootBuf<T>, Infallible>
[INFO] [stdout]    --> src/root.rs:144:60
[INFO] [stdout]     |
[INFO] [stdout] 144 |       fn try_from(from: String) -> Result<Self, Self::Error> {
[INFO] [stdout]     |  ____________________________________________________________^
[INFO] [stdout] 145 | |         Self::from_str(from.as_str())
[INFO] [stdout] 146 | |     }
[INFO] [stdout]     | |_____^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: std::result::Result<RootBuf<T>, Infallible>
[INFO] [stdout]    --> src/root.rs:145:9
[INFO] [stdout]     |
[INFO] [stdout] 145 |         Self::from_str(from.as_str())
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `maelstrom-util` (lib) due to 7 previous errors; 4 warnings emitted
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]    --> src/cache/fs/test.rs:858:20
[INFO] [stdout]     |
[INFO] [stdout] 858 |     fn lookup_leaf(&self, path: &Path) -> Result<FollowSymlinks> {
[INFO] [stdout]     |                    ^^^^^                         ^^^^^^^^^^^^^^ the same lifetime is hidden here
[INFO] [stdout]     |                    |
[INFO] [stdout]     |                    the lifetime is elided here
[INFO] [stdout]     |
[INFO] [stdout]     = help: the same lifetime is referred to in inconsistent ways, making the signature confusing
[INFO] [stdout]     = note: `#[warn(mismatched_lifetime_syntaxes)]` on by default
[INFO] [stdout] help: use `'_` for type paths
[INFO] [stdout]     |
[INFO] [stdout] 858 |     fn lookup_leaf(&self, path: &Path) -> Result<FollowSymlinks<'_>> {
[INFO] [stdout]     |                                                                ++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: std::result::Result<RootBuf<CacheDir>, Infallible>
[INFO] [stdout]     --> src/cache.rs:1098:17
[INFO] [stdout]      |
[INFO] [stdout] 1098 |                 "/z".parse().unwrap(),
[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: std::result::Result<RootBuf<CacheDir>, Infallible>
[INFO] [stdout]     --> src/cache.rs:2342:13
[INFO] [stdout]      |
[INFO] [stdout] 2342 |             "/z".parse().unwrap(),
[INFO] [stdout]      |             ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: std::result::Result<RootBuf<CacheDir>, Infallible>
[INFO] [stdout]     --> src/cache.rs:2375:13
[INFO] [stdout]      |
[INFO] [stdout] 2375 |             "/z".parse().unwrap(),
[INFO] [stdout]      |             ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: std::result::Result<RootBuf<CacheDir>, Infallible>
[INFO] [stdout]     --> src/cache.rs:2413:13
[INFO] [stdout]      |
[INFO] [stdout] 2413 |             "/z".parse().unwrap(),
[INFO] [stdout]      |             ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]    --> src/fs.rs:385:33
[INFO] [stdout]     |
[INFO] [stdout] 385 |     pub fn walk<P: AsRef<Path>>(&self, path: P) -> Walker {
[INFO] [stdout]     |                                 ^^^^^              ^^^^^^ the same lifetime is hidden here
[INFO] [stdout]     |                                 |
[INFO] [stdout]     |                                 the lifetime is elided here
[INFO] [stdout]     |
[INFO] [stdout]     = help: the same lifetime is referred to in inconsistent ways, making the signature confusing
[INFO] [stdout] help: use `'_` for type paths
[INFO] [stdout]     |
[INFO] [stdout] 385 |     pub fn walk<P: AsRef<Path>>(&self, path: P) -> Walker<'_> {
[INFO] [stdout]     |                                                          ++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: std::result::Result<RootBuf<T>, Infallible>
[INFO] [stdout]    --> src/root.rs:137:57
[INFO] [stdout]     |
[INFO] [stdout] 137 |       fn from_str(value: &str) -> Result<Self, Self::Err> {
[INFO] [stdout]     |  _________________________________________________________^
[INFO] [stdout] 138 | |         Ok(Self::new(PathBuf::from_str(value)?))
[INFO] [stdout] 139 | |     }
[INFO] [stdout]     | |_____^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: std::result::Result<RootBuf<T>, Infallible>
[INFO] [stdout]    --> src/root.rs:138:9
[INFO] [stdout]     |
[INFO] [stdout] 138 |         Ok(Self::new(PathBuf::from_str(value)?))
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: std::ops::ControlFlow<std::result::Result<Infallible, Infallible>, std::path::PathBuf>
[INFO] [stdout]    --> src/root.rs:138:22
[INFO] [stdout]     |
[INFO] [stdout] 138 |         Ok(Self::new(PathBuf::from_str(value)?))
[INFO] [stdout]     |                      ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: std::result::Result<std::path::PathBuf, Infallible>
[INFO] [stdout]    --> src/root.rs:138:22
[INFO] [stdout]     |
[INFO] [stdout] 138 |         Ok(Self::new(PathBuf::from_str(value)?))
[INFO] [stdout]     |                      ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: std::result::Result<RootBuf<T>, Infallible>
[INFO] [stdout]    --> src/root.rs:138:22
[INFO] [stdout]     |
[INFO] [stdout] 138 |         Ok(Self::new(PathBuf::from_str(value)?))
[INFO] [stdout]     |                      ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: std::result::Result<RootBuf<T>, Infallible>
[INFO] [stdout]    --> src/root.rs:144:60
[INFO] [stdout]     |
[INFO] [stdout] 144 |       fn try_from(from: String) -> Result<Self, Self::Error> {
[INFO] [stdout]     |  ____________________________________________________________^
[INFO] [stdout] 145 | |         Self::from_str(from.as_str())
[INFO] [stdout] 146 | |     }
[INFO] [stdout]     | |_____^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: std::result::Result<RootBuf<T>, Infallible>
[INFO] [stdout]    --> src/root.rs:145:9
[INFO] [stdout]     |
[INFO] [stdout] 145 |         Self::from_str(from.as_str())
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `maelstrom-util` (lib test) due to 11 previous errors; 4 warnings emitted
[INFO] running `Command { std: "docker" "inspect" "bde73d4e7790ce392a52b36cbc551372367b49fa294c05e11c2c21e4230ecec3", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "bde73d4e7790ce392a52b36cbc551372367b49fa294c05e11c2c21e4230ecec3", kill_on_drop: false }`
[INFO] [stdout] bde73d4e7790ce392a52b36cbc551372367b49fa294c05e11c2c21e4230ecec3
