[INFO] fetching crate vcsr 0.4.0...
[INFO] checking vcsr-0.4.0 against master#385fa9d845dd326c6bbfd58c22244215e431948a for absurd-question-mark-desugar
[INFO] extracting crate vcsr 0.4.0 into /workspace/builds/worker-5-tc1/source
[INFO] validating manifest of crates.io crate vcsr 0.4.0 on toolchain 385fa9d845dd326c6bbfd58c22244215e431948a
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+385fa9d845dd326c6bbfd58c22244215e431948a" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate vcsr 0.4.0
[INFO] finished tweaking crates.io crate vcsr 0.4.0
[INFO] tweaked toml for crates.io crate vcsr 0.4.0 written to /workspace/builds/worker-5-tc1/source/Cargo.toml
[INFO] crate crates.io crate vcsr 0.4.0 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" "+385fa9d845dd326c6bbfd58c22244215e431948a" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded unicode-width v0.1.6
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[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" "+385fa9d845dd326c6bbfd58c22244215e431948a" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 39c6425ee29f3dcf4bd121cd2e259d4d0bfbcb124a308f0ff2628eb6602f7b27
[INFO] running `Command { std: "docker" "start" "-a" "39c6425ee29f3dcf4bd121cd2e259d4d0bfbcb124a308f0ff2628eb6602f7b27", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "39c6425ee29f3dcf4bd121cd2e259d4d0bfbcb124a308f0ff2628eb6602f7b27", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "39c6425ee29f3dcf4bd121cd2e259d4d0bfbcb124a308f0ff2628eb6602f7b27", kill_on_drop: false }`
[INFO] [stdout] 39c6425ee29f3dcf4bd121cd2e259d4d0bfbcb124a308f0ff2628eb6602f7b27
[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" "+385fa9d845dd326c6bbfd58c22244215e431948a" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] e5a36445693ce62b48c53cab81778115e4e8254d862f6654d66745165dc9a60e
[INFO] running `Command { std: "docker" "start" "-a" "e5a36445693ce62b48c53cab81778115e4e8254d862f6654d66745165dc9a60e", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.62
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[INFO] [stderr]     Checking jpeg-decoder v0.1.22
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[INFO] [stderr]    Compiling proc-macro-error v0.2.6
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[INFO] [stderr]     Checking owned_ttf_parser v0.6.0
[INFO] [stderr]     Checking num v0.1.42
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[INFO] [stderr]    Compiling synstructure v0.10.2
[INFO] [stderr]     Checking termios v0.3.1
[INFO] [stderr]     Checking atty v0.2.13
[INFO] [stderr]    Compiling syn v0.14.9
[INFO] [stderr]     Checking lock_api v0.3.1
[INFO] [stderr]     Checking bytemuck v1.7.2
[INFO] [stderr]     Checking scoped_threadpool v0.1.9
[INFO] [stderr]     Checking vec_map v0.8.1
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[INFO] [stderr]     Checking custom_derive v0.1.7
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[INFO] [stderr]     Checking parking_lot v0.9.0
[INFO] [stderr]     Checking clap v2.33.0
[INFO] [stderr]     Checking num v0.3.1
[INFO] [stderr]     Checking rand_distr v0.2.2
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[INFO] [stderr]     Checking chrono v0.4.8
[INFO] [stderr]     Checking rulinalg v0.4.2
[INFO] [stderr]    Compiling serde_derive v1.0.99
[INFO] [stderr]    Compiling structopt-derive v0.3.0
[INFO] [stderr]    Compiling thiserror-impl v1.0.20
[INFO] [stderr]     Checking failure v0.1.5
[INFO] [stderr]     Checking phf v0.7.24
[INFO] [stderr]     Checking itertools v0.9.0
[INFO] [stderr]     Checking number_prefix v0.2.8
[INFO] [stderr]     Checking dirs-sys v0.3.4
[INFO] [stderr]     Checking strength_reduce v0.2.2
[INFO] [stderr]     Checking same-file v1.0.5
[INFO] [stderr]     Checking itoa v0.4.4
[INFO] [stderr]     Checking transpose v0.1.0
[INFO] [stderr]     Checking glob v0.3.0
[INFO] [stderr]     Checking quick-error v1.2.2
[INFO] [stderr]     Checking approx v0.1.1
[INFO] [stderr]     Checking yansi v0.5.0
[INFO] [stderr]     Checking humantime v1.2.0
[INFO] [stderr]     Checking rustfft v3.0.0
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[INFO] [stderr]     Checking flexi_logger v0.14.3
[INFO] [stderr]     Checking dirs v2.0.2
[INFO] [stderr]     Checking imageproc v0.22.0
[INFO] [stderr]     Checking indicatif v0.11.0
[INFO] [stderr]     Checking thiserror v1.0.20
[INFO] [stderr]     Checking dotenv v0.14.1
[INFO] [stderr]     Checking exitcode v1.1.2
[INFO] [stderr]     Checking structopt v0.3.0
[INFO] [stderr]    Compiling palette_derive v0.4.1
[INFO] [stderr]     Checking serde_json v1.0.40
[INFO] [stderr]     Checking vcsr v0.4.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: the item `image` is imported redundantly
[INFO] [stdout]  --> src/models.rs:4:5
[INFO] [stdout]   |
[INFO] [stdout] 4 | use image;
[INFO] [stdout]   |     ^^^^^
[INFO] [stdout]   |
[INFO] [stdout]  ::: src/lib.rs:7:1
[INFO] [stdout]   |
[INFO] [stdout] 7 | extern crate image;
[INFO] [stdout]   | ------------------- the item `image` is already imported here
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around index expression
[INFO] [stdout]    --> src/models.rs:542:31
[INFO] [stdout]     |
[INFO] [stdout] 542 |                 matrix_subset[(length - 1)] / 2.0
[INFO] [stdout]     |                               ^          ^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_parens)]` on by default
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]     |
[INFO] [stdout] 542 -                 matrix_subset[(length - 1)] / 2.0
[INFO] [stdout] 542 +                 matrix_subset[length - 1] / 2.0
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `image` is imported redundantly
[INFO] [stdout]  --> src/models.rs:4:5
[INFO] [stdout]   |
[INFO] [stdout] 4 | use image;
[INFO] [stdout]   |     ^^^^^
[INFO] [stdout]   |
[INFO] [stdout]  ::: src/lib.rs:7:1
[INFO] [stdout]   |
[INFO] [stdout] 7 | extern crate image;
[INFO] [stdout]   | ------------------- the item `image` is already imported here
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around index expression
[INFO] [stdout]    --> src/models.rs:542:31
[INFO] [stdout]     |
[INFO] [stdout] 542 |                 matrix_subset[(length - 1)] / 2.0
[INFO] [stdout]     |                               ^          ^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_parens)]` on by default
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]     |
[INFO] [stdout] 542 -                 matrix_subset[(length - 1)] / 2.0
[INFO] [stdout] 542 +                 matrix_subset[length - 1] / 2.0
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused borrow that must be used
[INFO] [stdout]    --> src/operations.rs:124:5
[INFO] [stdout]     |
[INFO] [stdout] 124 |     &time_sorted.sort_by(|a, b| a.timestamp.partial_cmp(&b.timestamp).unwrap());
[INFO] [stdout]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ the borrow produces a value
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]     |
[INFO] [stdout] 124 |     let _ = &time_sorted.sort_by(|a, b| a.timestamp.partial_cmp(&b.timestamp).unwrap());
[INFO] [stdout]     |     +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 3 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused borrow that must be used
[INFO] [stdout]    --> src/operations.rs:124:5
[INFO] [stdout]     |
[INFO] [stdout] 124 |     &time_sorted.sort_by(|a, b| a.timestamp.partial_cmp(&b.timestamp).unwrap());
[INFO] [stdout]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ the borrow produces a value
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]     |
[INFO] [stdout] 124 |     let _ = &time_sorted.sort_by(|a, b| a.timestamp.partial_cmp(&b.timestamp).unwrap());
[INFO] [stdout]     |     +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 3 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 1m 06s
[INFO] [stderr] warning: the following packages contain code that will be rejected by a future version of Rust: syn v0.14.9
[INFO] [stderr] note: to see what the problems were, use the option `--future-incompat-report`, or run `cargo report future-incompatibilities --id 4`
[INFO] running `Command { std: "docker" "inspect" "e5a36445693ce62b48c53cab81778115e4e8254d862f6654d66745165dc9a60e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e5a36445693ce62b48c53cab81778115e4e8254d862f6654d66745165dc9a60e", kill_on_drop: false }`
[INFO] [stdout] e5a36445693ce62b48c53cab81778115e4e8254d862f6654d66745165dc9a60e
[INFO] checking vcsr-0.4.0 against try#645bb72776a6a56a1a8f52631a44bd082b2ba509 for absurd-question-mark-desugar
[INFO] extracting crate vcsr 0.4.0 into /workspace/builds/worker-5-tc2/source
[INFO] validating manifest of crates.io crate vcsr 0.4.0 on toolchain 645bb72776a6a56a1a8f52631a44bd082b2ba509
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+645bb72776a6a56a1a8f52631a44bd082b2ba509" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate vcsr 0.4.0
[INFO] finished tweaking crates.io crate vcsr 0.4.0
[INFO] tweaked toml for crates.io crate vcsr 0.4.0 written to /workspace/builds/worker-5-tc2/source/Cargo.toml
[INFO] crate crates.io crate vcsr 0.4.0 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" "+645bb72776a6a56a1a8f52631a44bd082b2ba509" "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" "+645bb72776a6a56a1a8f52631a44bd082b2ba509" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 249d3429342d203d2658748081c5615169342c1fa48abbe22a5d1298ae3c8bf5
[INFO] running `Command { std: "docker" "start" "-a" "249d3429342d203d2658748081c5615169342c1fa48abbe22a5d1298ae3c8bf5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "249d3429342d203d2658748081c5615169342c1fa48abbe22a5d1298ae3c8bf5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "249d3429342d203d2658748081c5615169342c1fa48abbe22a5d1298ae3c8bf5", kill_on_drop: false }`
[INFO] [stdout] 249d3429342d203d2658748081c5615169342c1fa48abbe22a5d1298ae3c8bf5
[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" "-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" "+645bb72776a6a56a1a8f52631a44bd082b2ba509" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] e12736e1531922e3b0e93d963131a88999ea78298276a3cba6a9fbb282b8eb76
[INFO] running `Command { std: "docker" "start" "-a" "e12736e1531922e3b0e93d963131a88999ea78298276a3cba6a9fbb282b8eb76", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.62
[INFO] [stderr]    Compiling num-traits v0.2.14
[INFO] [stderr]    Compiling autocfg v0.1.6
[INFO] [stderr]     Checking cfg-if v0.1.9
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[INFO] [stderr]    Compiling palette_derive v0.4.1
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[INFO] [stderr]     Checking vcsr v0.4.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: the item `image` is imported redundantly
[INFO] [stdout]  --> src/models.rs:4:5
[INFO] [stdout]   |
[INFO] [stdout] 4 | use image;
[INFO] [stdout]   |     ^^^^^
[INFO] [stdout]   |
[INFO] [stdout]  ::: src/lib.rs:7:1
[INFO] [stdout]   |
[INFO] [stdout] 7 | extern crate image;
[INFO] [stdout]   | ------------------- the item `image` is already imported here
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around index expression
[INFO] [stdout]    --> src/models.rs:542:31
[INFO] [stdout]     |
[INFO] [stdout] 542 |                 matrix_subset[(length - 1)] / 2.0
[INFO] [stdout]     |                               ^          ^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_parens)]` on by default
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]     |
[INFO] [stdout] 542 -                 matrix_subset[(length - 1)] / 2.0
[INFO] [stdout] 542 +                 matrix_subset[length - 1] / 2.0
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `image` is imported redundantly
[INFO] [stdout]  --> src/models.rs:4:5
[INFO] [stdout]   |
[INFO] [stdout] 4 | use image;
[INFO] [stdout]   |     ^^^^^
[INFO] [stdout]   |
[INFO] [stdout]  ::: src/lib.rs:7:1
[INFO] [stdout]   |
[INFO] [stdout] 7 | extern crate image;
[INFO] [stdout]   | ------------------- the item `image` is already imported here
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around index expression
[INFO] [stdout]    --> src/models.rs:542:31
[INFO] [stdout]     |
[INFO] [stdout] 542 |                 matrix_subset[(length - 1)] / 2.0
[INFO] [stdout]     |                               ^          ^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_parens)]` on by default
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]     |
[INFO] [stdout] 542 -                 matrix_subset[(length - 1)] / 2.0
[INFO] [stdout] 542 +                 matrix_subset[length - 1] / 2.0
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused borrow that must be used
[INFO] [stdout]    --> src/operations.rs:124:5
[INFO] [stdout]     |
[INFO] [stdout] 124 |     &time_sorted.sort_by(|a, b| a.timestamp.partial_cmp(&b.timestamp).unwrap());
[INFO] [stdout]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ the borrow produces a value
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]     |
[INFO] [stdout] 124 |     let _ = &time_sorted.sort_by(|a, b| a.timestamp.partial_cmp(&b.timestamp).unwrap());
[INFO] [stdout]     |     +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 3 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused borrow that must be used
[INFO] [stdout]    --> src/operations.rs:124:5
[INFO] [stdout]     |
[INFO] [stdout] 124 |     &time_sorted.sort_by(|a, b| a.timestamp.partial_cmp(&b.timestamp).unwrap());
[INFO] [stdout]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ the borrow produces a value
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]     |
[INFO] [stdout] 124 |     let _ = &time_sorted.sort_by(|a, b| a.timestamp.partial_cmp(&b.timestamp).unwrap());
[INFO] [stdout]     |     +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 3 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 1m 06s
[INFO] [stderr] warning: the following packages contain code that will be rejected by a future version of Rust: syn v0.14.9
[INFO] [stderr] note: to see what the problems were, use the option `--future-incompat-report`, or run `cargo report future-incompatibilities --id 2`
[INFO] running `Command { std: "docker" "inspect" "e12736e1531922e3b0e93d963131a88999ea78298276a3cba6a9fbb282b8eb76", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e12736e1531922e3b0e93d963131a88999ea78298276a3cba6a9fbb282b8eb76", kill_on_drop: false }`
[INFO] [stdout] e12736e1531922e3b0e93d963131a88999ea78298276a3cba6a9fbb282b8eb76