[INFO] fetching crate sheesy-vault 4.0.11...
[INFO] checking sheesy-vault-4.0.11 against nightly-2024-02-05 for check-cfg-2
[INFO] extracting crate sheesy-vault 4.0.11 into /workspace/builds/worker-5-tc1/source
[INFO] validating manifest of crates.io crate sheesy-vault 4.0.11 on toolchain nightly-2024-02-05
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+nightly-2024-02-05" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate sheesy-vault 4.0.11
[INFO] finished tweaking crates.io crate sheesy-vault 4.0.11
[INFO] tweaked toml for crates.io crate sheesy-vault 4.0.11 written to /workspace/builds/worker-5-tc1/source/Cargo.toml
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+nightly-2024-02-05" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Updating crates.io index
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+nightly-2024-02-05" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded smallvec v0.6.14
[INFO] [stderr]   Downloaded cstr-argument v0.1.2
[INFO] [stderr]   Downloaded conv v0.3.3
[INFO] [stderr]   Downloaded mktemp v0.4.1
[INFO] [stderr]   Downloaded gpgme v0.8.0
[INFO] [stderr]   Downloaded gpgme-sys v0.8.0
[INFO] [stderr]   Downloaded gpg-error v0.4.1
[INFO] [stderr]   Downloaded libgpg-error-sys v0.4.1
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc1/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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+nightly-2024-02-05" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] b325c5adfa559ca13f89c95d507a0ae60d54c6fd622d583141a8398d6b80344e
[INFO] running `Command { std: "docker" "start" "-a" "b325c5adfa559ca13f89c95d507a0ae60d54c6fd622d583141a8398d6b80344e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "b325c5adfa559ca13f89c95d507a0ae60d54c6fd622d583141a8398d6b80344e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b325c5adfa559ca13f89c95d507a0ae60d54c6fd622d583141a8398d6b80344e", kill_on_drop: false }`
[INFO] [stdout] b325c5adfa559ca13f89c95d507a0ae60d54c6fd622d583141a8398d6b80344e
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc1/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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+nightly-2024-02-05" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] eff1335811af06421a904d1ab216ae11414862d5a488b4e0cadb92c337280f75
[INFO] running `Command { std: "docker" "start" "-a" "eff1335811af06421a904d1ab216ae11414862d5a488b4e0cadb92c337280f75", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.153
[INFO] [stderr]     Checking memchr v2.7.1
[INFO] [stderr]    Compiling maybe-uninit v2.0.0
[INFO] [stderr]    Compiling gpg-error v0.4.1
[INFO] [stderr]     Checking gimli v0.28.1
[INFO] [stderr]     Checking adler v1.0.2
[INFO] [stderr]    Compiling unicode-xid v0.2.4
[INFO] [stderr]    Compiling failure_derive v0.1.8
[INFO] [stderr]     Checking custom_derive v0.1.7
[INFO] [stderr]    Compiling indexmap v1.9.3
[INFO] [stderr]    Compiling gpgme v0.8.0
[INFO] [stderr]     Checking rustc-demangle v0.1.23
[INFO] [stderr]     Checking uuid v0.8.2
[INFO] [stderr]    Compiling syn v2.0.48
[INFO] [stderr]     Checking itertools v0.9.0
[INFO] [stderr]     Checking glob v0.3.1
[INFO] [stderr]     Checking conv v0.3.3
[INFO] [stderr]    Compiling synstructure v0.12.6
[INFO] [stderr]     Checking miniz_oxide v0.7.2
[INFO] [stderr]     Checking mktemp v0.4.1
[INFO] [stderr]    Compiling cc v1.0.83
[INFO] [stderr]     Checking serde_yaml v0.8.26
[INFO] [stderr]     Checking smallvec v0.6.14
[INFO] [stderr]     Checking object v0.32.2
[INFO] [stderr]     Checking cstr-argument v0.1.2
[INFO] [stderr]    Compiling libgpg-error-sys v0.4.1
[INFO] [stderr]    Compiling gpgme-sys v0.8.0
[INFO] [stderr]    Compiling backtrace v0.3.69
[INFO] [stderr]     Checking addr2line v0.21.0
[INFO] [stderr]    Compiling serde_derive v1.0.196
[INFO] [stderr]     Checking failure v0.1.8
[INFO] [stderr]     Checking sheesy-vault v4.0.11 (/opt/rustwide/workdir)
[INFO] [stdout] warning: use of deprecated method `failure::Fail::causes`: please use the 'iter_chain()' method instead
[INFO] [stdout]    --> src/error.rs:176:14
[INFO] [stdout]     |
[INFO] [stdout] 176 |         self.causes().filter_map(|c| c.downcast_ref::<T>()).next()
[INFO] [stdout]     |              ^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(deprecated)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated method `failure::Fail::causes`: please use the 'iter_chain()' method instead
[INFO] [stdout]    --> src/error.rs:176:14
[INFO] [stdout]     |
[INFO] [stdout] 176 |         self.causes().filter_map(|c| c.downcast_ref::<T>()).next()
[INFO] [stdout]     |              ^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(deprecated)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused return value of `std::mem::replace` that must be used
[INFO] [stdout]    --> src/resource.rs:197:25
[INFO] [stdout]     |
[INFO] [stdout] 197 | /                         mem::replace(
[INFO] [stdout] 198 | |                             none,
[INFO] [stdout] 199 | |                             Some((
[INFO] [stdout] 200 | |                                 partition.secrets_path(),
[INFO] [stdout] ...   |
[INFO] [stdout] 206 | |                             )),
[INFO] [stdout] 207 | |                         );
[INFO] [stdout]     | |_________________________^
[INFO] [stdout]     |
[INFO] [stdout]     = note: if you don't need the old value, you can just assign the new value directly
[INFO] [stdout]     = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]     |
[INFO] [stdout] 197 |                         let _ = mem::replace(
[INFO] [stdout]     |                         +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused return value of `std::mem::replace` that must be used
[INFO] [stdout]    --> src/resource.rs:197:25
[INFO] [stdout]     |
[INFO] [stdout] 197 | /                         mem::replace(
[INFO] [stdout] 198 | |                             none,
[INFO] [stdout] 199 | |                             Some((
[INFO] [stdout] 200 | |                                 partition.secrets_path(),
[INFO] [stdout] ...   |
[INFO] [stdout] 206 | |                             )),
[INFO] [stdout] 207 | |                         );
[INFO] [stdout]     | |_________________________^
[INFO] [stdout]     |
[INFO] [stdout]     = note: if you don't need the old value, you can just assign the new value directly
[INFO] [stdout]     = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]     |
[INFO] [stdout] 197 |                         let _ = mem::replace(
[INFO] [stdout]     |                         +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 14.04s
[INFO] running `Command { std: "docker" "inspect" "eff1335811af06421a904d1ab216ae11414862d5a488b4e0cadb92c337280f75", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "eff1335811af06421a904d1ab216ae11414862d5a488b4e0cadb92c337280f75", kill_on_drop: false }`
[INFO] [stdout] eff1335811af06421a904d1ab216ae11414862d5a488b4e0cadb92c337280f75
[INFO] checking sheesy-vault-4.0.11 against nightly-2024-02-05+rustflags=-Dunexpected_cfgs+cargoflags=-Zcheck-cfg for check-cfg-2
[INFO] extracting crate sheesy-vault 4.0.11 into /workspace/builds/worker-5-tc2/source
[INFO] validating manifest of crates.io crate sheesy-vault 4.0.11 on toolchain nightly-2024-02-05
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+nightly-2024-02-05" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate sheesy-vault 4.0.11
[INFO] finished tweaking crates.io crate sheesy-vault 4.0.11
[INFO] tweaked toml for crates.io crate sheesy-vault 4.0.11 written to /workspace/builds/worker-5-tc2/source/Cargo.toml
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+nightly-2024-02-05" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+nightly-2024-02-05" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+nightly-2024-02-05" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] e64105e6273dc823682e9228fc8a2d69f2cd6772403d59f1750d7330e535cbd0
[INFO] running `Command { std: "docker" "start" "-a" "e64105e6273dc823682e9228fc8a2d69f2cd6772403d59f1750d7330e535cbd0", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "e64105e6273dc823682e9228fc8a2d69f2cd6772403d59f1750d7330e535cbd0", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e64105e6273dc823682e9228fc8a2d69f2cd6772403d59f1750d7330e535cbd0", kill_on_drop: false }`
[INFO] [stdout] e64105e6273dc823682e9228fc8a2d69f2cd6772403d59f1750d7330e535cbd0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-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 -Dunexpected_cfgs" "-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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+nightly-2024-02-05" "check" "--frozen" "--all" "--all-targets" "--message-format=json" "-Zcheck-cfg", kill_on_drop: false }`
[INFO] [stdout] 5d3285701f0536f4c7e1cb6f972f8cca4add45b83cff04c62d150a04a0897822
[INFO] running `Command { std: "docker" "start" "-a" "5d3285701f0536f4c7e1cb6f972f8cca4add45b83cff04c62d150a04a0897822", kill_on_drop: false }`
[INFO] [stderr]     Checking memchr v2.7.1
[INFO] [stderr]    Compiling maybe-uninit v2.0.0
[INFO] [stderr]    Compiling unicode-xid v0.2.4
[INFO] [stderr]    Compiling gpg-error v0.4.1
[INFO] [stderr]    Compiling failure_derive v0.1.8
[INFO] [stderr]     Checking adler v1.0.2
[INFO] [stderr]     Checking gimli v0.28.1
[INFO] [stderr]    Compiling gpgme v0.8.0
[INFO] [stderr]    Compiling libc v0.2.153
[INFO] [stderr]    Compiling indexmap v1.9.3
[INFO] [stderr]     Checking custom_derive v0.1.7
[INFO] [stderr]     Checking rustc-demangle v0.1.23
[INFO] [stderr]     Checking uuid v0.8.2
[INFO] [stderr]    Compiling syn v2.0.48
[INFO] [stderr]     Checking itertools v0.9.0
[INFO] [stderr]     Checking glob v0.3.1
[INFO] [stderr]     Checking miniz_oxide v0.7.2
[INFO] [stderr]    Compiling synstructure v0.12.6
[INFO] [stderr]     Checking conv v0.3.3
[INFO] [stderr]     Checking mktemp v0.4.1
[INFO] [stderr]     Checking object v0.32.2
[INFO] [stderr]     Checking cstr-argument v0.1.2
[INFO] [stderr]    Compiling cc v1.0.83
[INFO] [stderr]     Checking smallvec v0.6.14
[INFO] [stderr]     Checking serde_yaml v0.8.26
[INFO] [stderr]    Compiling libgpg-error-sys v0.4.1
[INFO] [stderr]    Compiling gpgme-sys v0.8.0
[INFO] [stderr]    Compiling backtrace v0.3.69
[INFO] [stderr]     Checking addr2line v0.21.0
[INFO] [stderr]    Compiling serde_derive v1.0.196
[INFO] [stderr]     Checking failure v0.1.8
[INFO] [stderr]     Checking sheesy-vault v4.0.11 (/opt/rustwide/workdir)
[INFO] [stdout] error: unexpected `cfg` condition value: `cargo-clippy`
[INFO] [stdout]   --> src/init.rs:36:16
[INFO] [stdout]    |
[INFO] [stdout] 36 |     #[cfg_attr(feature = "cargo-clippy", allow(clippy::too_many_arguments))]
[INFO] [stdout]    |                ^^^^^^^^^^^^^^^^^^^^^^^^ help: remove the condition
[INFO] [stdout]    |
[INFO] [stdout]    = note: no expected values for `feature`
[INFO] [stdout]    = help: consider adding `cargo-clippy` as a feature in `Cargo.toml`
[INFO] [stdout]    = note: see <https://doc.rust-lang.org/nightly/cargo/reference/unstable.html#check-cfg> for more information about checking conditional configuration
[INFO] [stdout]    = note: requested on the command line with `-D unexpected-cfgs`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: unexpected `cfg` condition value: `cargo-clippy`
[INFO] [stdout]   --> src/init.rs:36:16
[INFO] [stdout]    |
[INFO] [stdout] 36 |     #[cfg_attr(feature = "cargo-clippy", allow(clippy::too_many_arguments))]
[INFO] [stdout]    |                ^^^^^^^^^^^^^^^^^^^^^^^^ help: remove the condition
[INFO] [stdout]    |
[INFO] [stdout]    = note: no expected values for `feature`
[INFO] [stdout]    = help: consider adding `cargo-clippy` as a feature in `Cargo.toml`
[INFO] [stdout]    = note: see <https://doc.rust-lang.org/nightly/cargo/reference/unstable.html#check-cfg> for more information about checking conditional configuration
[INFO] [stdout]    = note: requested on the command line with `-D unexpected-cfgs`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated method `failure::Fail::causes`: please use the 'iter_chain()' method instead
[INFO] [stdout]    --> src/error.rs:176:14
[INFO] [stdout]     |
[INFO] [stdout] 176 |         self.causes().filter_map(|c| c.downcast_ref::<T>()).next()
[INFO] [stdout]     |              ^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(deprecated)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated method `failure::Fail::causes`: please use the 'iter_chain()' method instead
[INFO] [stdout]    --> src/error.rs:176:14
[INFO] [stdout]     |
[INFO] [stdout] 176 |         self.causes().filter_map(|c| c.downcast_ref::<T>()).next()
[INFO] [stdout]     |              ^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(deprecated)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused return value of `std::mem::replace` that must be used
[INFO] [stdout]    --> src/resource.rs:197:25
[INFO] [stdout]     |
[INFO] [stdout] 197 | /                         mem::replace(
[INFO] [stdout] 198 | |                             none,
[INFO] [stdout] 199 | |                             Some((
[INFO] [stdout] 200 | |                                 partition.secrets_path(),
[INFO] [stdout] ...   |
[INFO] [stdout] 206 | |                             )),
[INFO] [stdout] 207 | |                         );
[INFO] [stdout]     | |_________________________^
[INFO] [stdout]     |
[INFO] [stdout]     = note: if you don't need the old value, you can just assign the new value directly
[INFO] [stdout]     = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]     |
[INFO] [stdout] 197 |                         let _ = mem::replace(
[INFO] [stdout]     |                         +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 1 previous error; 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `sheesy-vault` (lib) due to 2 previous errors; 2 warnings emitted
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stdout] warning: unused return value of `std::mem::replace` that must be used
[INFO] [stdout]    --> src/resource.rs:197:25
[INFO] [stdout]     |
[INFO] [stdout] 197 | /                         mem::replace(
[INFO] [stdout] 198 | |                             none,
[INFO] [stdout] 199 | |                             Some((
[INFO] [stdout] 200 | |                                 partition.secrets_path(),
[INFO] [stdout] ...   |
[INFO] [stdout] 206 | |                             )),
[INFO] [stdout] 207 | |                         );
[INFO] [stdout]     | |_________________________^
[INFO] [stdout]     |
[INFO] [stdout]     = note: if you don't need the old value, you can just assign the new value directly
[INFO] [stdout]     = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]     |
[INFO] [stdout] 197 |                         let _ = mem::replace(
[INFO] [stdout]     |                         +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 1 previous error; 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `sheesy-vault` (lib test) due to 2 previous errors; 2 warnings emitted
[INFO] running `Command { std: "docker" "inspect" "5d3285701f0536f4c7e1cb6f972f8cca4add45b83cff04c62d150a04a0897822", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "5d3285701f0536f4c7e1cb6f972f8cca4add45b83cff04c62d150a04a0897822", kill_on_drop: false }`
[INFO] [stdout] 5d3285701f0536f4c7e1cb6f972f8cca4add45b83cff04c62d150a04a0897822
