[INFO] cloning repository https://github.com/hzoells/rust_text_editor [INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/hzoells/rust_text_editor" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fhzoells%2Frust_text_editor", kill_on_drop: false }` [INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fhzoells%2Frust_text_editor'... [INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }` [INFO] [stdout] 66ddea2bd9c3baf10f3d09db5559097c84ad6b35 [INFO] checking hzoells/rust_text_editor against master#8424f8e8cdf07010967a57584fd647b30e930d4d for pr-120095 [INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fhzoells%2Frust_text_editor" "/workspace/builds/worker-4-tc1/source", kill_on_drop: false }` [INFO] [stderr] Cloning into '/workspace/builds/worker-4-tc1/source'... [INFO] [stderr] done. [INFO] validating manifest of git repo https://github.com/hzoells/rust_text_editor on toolchain 8424f8e8cdf07010967a57584fd647b30e930d4d [INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+8424f8e8cdf07010967a57584fd647b30e930d4d" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }` [INFO] started tweaking git repo https://github.com/hzoells/rust_text_editor [INFO] finished tweaking git repo https://github.com/hzoells/rust_text_editor [INFO] tweaked toml for git repo https://github.com/hzoells/rust_text_editor written to /workspace/builds/worker-4-tc1/source/Cargo.toml [INFO] crate git repo https://github.com/hzoells/rust_text_editor 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" "+8424f8e8cdf07010967a57584fd647b30e930d4d" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }` [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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" "+8424f8e8cdf07010967a57584fd647b30e930d4d" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }` [INFO] [stdout] 51bdf092e5d5d69f4557f4fb78785323c0729e053583d80facb98a8aba48d9b0 [INFO] running `Command { std: "docker" "start" "-a" "51bdf092e5d5d69f4557f4fb78785323c0729e053583d80facb98a8aba48d9b0", kill_on_drop: false }` [INFO] running `Command { std: "docker" "inspect" "51bdf092e5d5d69f4557f4fb78785323c0729e053583d80facb98a8aba48d9b0", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "51bdf092e5d5d69f4557f4fb78785323c0729e053583d80facb98a8aba48d9b0", kill_on_drop: false }` [INFO] [stdout] 51bdf092e5d5d69f4557f4fb78785323c0729e053583d80facb98a8aba48d9b0 [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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" "+8424f8e8cdf07010967a57584fd647b30e930d4d" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }` [INFO] [stdout] aeae39f1958b4a5260230098a4a2a2ccfb7738b6cb9bda40e345f6f04265cac4 [INFO] running `Command { std: "docker" "start" "-a" "aeae39f1958b4a5260230098a4a2a2ccfb7738b6cb9bda40e345f6f04265cac4", kill_on_drop: false }` [INFO] [stderr] Compiling libc v0.2.144 [INFO] [stderr] Checking numtoa v0.1.0 [INFO] [stderr] Checking unicode-segmentation v1.10.1 [INFO] [stderr] Checking termion v2.0.1 [INFO] [stderr] Checking rust_text_editor v0.1.0 (/opt/rustwide/workdir) [INFO] [stdout] warning: unused import: `fmt::format` [INFO] [stdout] --> src/row.rs:4:16 [INFO] [stdout] | [INFO] [stdout] 4 | use std::{cmp, fmt::format}; [INFO] [stdout] | ^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_imports)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused import: `fmt::format` [INFO] [stdout] --> src/row.rs:4:16 [INFO] [stdout] | [INFO] [stdout] 4 | use std::{cmp, fmt::format}; [INFO] [stdout] | ^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_imports)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: variable does not need to be mutable [INFO] [stdout] --> src/editor.rs:313:13 [INFO] [stdout] | [INFO] [stdout] 313 | let mut offset = &mut self.offset; [INFO] [stdout] | ----^^^^^^ [INFO] [stdout] | | [INFO] [stdout] | help: remove this `mut` [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_mut)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: variable does not need to be mutable [INFO] [stdout] --> src/editor.rs:313:13 [INFO] [stdout] | [INFO] [stdout] 313 | let mut offset = &mut self.offset; [INFO] [stdout] | ----^^^^^^ [INFO] [stdout] | | [INFO] [stdout] | help: remove this `mut` [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_mut)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: variable does not need to be mutable [INFO] [stdout] --> src/terminal.rs:60:22 [INFO] [stdout] | [INFO] [stdout] 60 | let Position{mut x, mut y} = position; [INFO] [stdout] | ----^ [INFO] [stdout] | | [INFO] [stdout] | help: remove this `mut` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: variable does not need to be mutable [INFO] [stdout] --> src/terminal.rs:60:29 [INFO] [stdout] | [INFO] [stdout] 60 | let Position{mut x, mut y} = position; [INFO] [stdout] | ----^ [INFO] [stdout] | | [INFO] [stdout] | help: remove this `mut` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: variable does not need to be mutable [INFO] [stdout] --> src/terminal.rs:60:22 [INFO] [stdout] | [INFO] [stdout] 60 | let Position{mut x, mut y} = position; [INFO] [stdout] | ----^ [INFO] [stdout] | | [INFO] [stdout] | help: remove this `mut` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: variable does not need to be mutable [INFO] [stdout] --> src/terminal.rs:60:29 [INFO] [stdout] | [INFO] [stdout] 60 | let Position{mut x, mut y} = position; [INFO] [stdout] | ----^ [INFO] [stdout] | | [INFO] [stdout] | help: remove this `mut` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused borrow that must be used [INFO] [stdout] --> src/editor.rs:331:13 [INFO] [stdout] | [INFO] [stdout] 331 | &self.refresh_screen()?; [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] 331 | let _ = &self.refresh_screen()?; [INFO] [stdout] | +++++++ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused borrow that must be used [INFO] [stdout] --> src/editor.rs:331:13 [INFO] [stdout] | [INFO] [stdout] 331 | &self.refresh_screen()?; [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] 331 | let _ = &self.refresh_screen()?; [INFO] [stdout] | +++++++ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: 5 warnings emitted [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: 5 warnings emitted [INFO] [stdout] [INFO] [stdout] [INFO] [stderr] Finished dev [unoptimized + debuginfo] target(s) in 0.76s [INFO] running `Command { std: "docker" "inspect" "aeae39f1958b4a5260230098a4a2a2ccfb7738b6cb9bda40e345f6f04265cac4", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "aeae39f1958b4a5260230098a4a2a2ccfb7738b6cb9bda40e345f6f04265cac4", kill_on_drop: false }` [INFO] [stdout] aeae39f1958b4a5260230098a4a2a2ccfb7738b6cb9bda40e345f6f04265cac4 [INFO] checking hzoells/rust_text_editor against try#047472f299946caf090d1b5608ae4bd9f0416256+rustflags=-Ddereferencing_mut_binding for pr-120095 [INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fhzoells%2Frust_text_editor" "/workspace/builds/worker-4-tc2/source", kill_on_drop: false }` [INFO] [stderr] Cloning into '/workspace/builds/worker-4-tc2/source'... [INFO] [stderr] done. [INFO] validating manifest of git repo https://github.com/hzoells/rust_text_editor on toolchain 047472f299946caf090d1b5608ae4bd9f0416256 [INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+047472f299946caf090d1b5608ae4bd9f0416256" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }` [INFO] started tweaking git repo https://github.com/hzoells/rust_text_editor [INFO] finished tweaking git repo https://github.com/hzoells/rust_text_editor [INFO] tweaked toml for git repo https://github.com/hzoells/rust_text_editor written to /workspace/builds/worker-4-tc2/source/Cargo.toml [INFO] crate git repo https://github.com/hzoells/rust_text_editor 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" "+047472f299946caf090d1b5608ae4bd9f0416256" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }` [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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" "+047472f299946caf090d1b5608ae4bd9f0416256" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }` [INFO] [stdout] f4a27ce65efb2d092eb7ae39c00aff2e0a763aeb1f324dd49a3d046f52111e04 [INFO] running `Command { std: "docker" "start" "-a" "f4a27ce65efb2d092eb7ae39c00aff2e0a763aeb1f324dd49a3d046f52111e04", kill_on_drop: false }` [INFO] running `Command { std: "docker" "inspect" "f4a27ce65efb2d092eb7ae39c00aff2e0a763aeb1f324dd49a3d046f52111e04", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "f4a27ce65efb2d092eb7ae39c00aff2e0a763aeb1f324dd49a3d046f52111e04", kill_on_drop: false }` [INFO] [stdout] f4a27ce65efb2d092eb7ae39c00aff2e0a763aeb1f324dd49a3d046f52111e04 [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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 -Ddereferencing_mut_binding" "-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" "+047472f299946caf090d1b5608ae4bd9f0416256" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }` [INFO] [stdout] c9b5425b9fdbc750a347cab21863436a5d41812f87fe2ca6fe4ae00210653dc4 [INFO] running `Command { std: "docker" "start" "-a" "c9b5425b9fdbc750a347cab21863436a5d41812f87fe2ca6fe4ae00210653dc4", kill_on_drop: false }` [INFO] [stderr] Compiling libc v0.2.144 [INFO] [stderr] Checking numtoa v0.1.0 [INFO] [stderr] Checking unicode-segmentation v1.10.1 [INFO] [stderr] Checking termion v2.0.1 [INFO] [stderr] Checking rust_text_editor v0.1.0 (/opt/rustwide/workdir) [INFO] [stdout] warning: unused import: `fmt::format` [INFO] [stdout] --> src/row.rs:4:16 [INFO] [stdout] | [INFO] [stdout] 4 | use std::{cmp, fmt::format}; [INFO] [stdout] | ^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_imports)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused import: `fmt::format` [INFO] [stdout] --> src/row.rs:4:16 [INFO] [stdout] | [INFO] [stdout] 4 | use std::{cmp, fmt::format}; [INFO] [stdout] | ^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_imports)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] error: dereferencing `mut` binding [INFO] [stdout] --> src/terminal.rs:60:22 [INFO] [stdout] | [INFO] [stdout] 60 | let Position{mut x, mut y} = position; [INFO] [stdout] | ^^^^^ `mut` dereferences the type of this binding [INFO] [stdout] | [INFO] [stdout] help: this will change in edition 2024 [INFO] [stdout] --> src/terminal.rs:60:22 [INFO] [stdout] | [INFO] [stdout] 60 | let Position{mut x, mut y} = position; [INFO] [stdout] | ^^^^^ [INFO] [stdout] = note: requested on the command line with `-D dereferencing-mut-binding` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] error: dereferencing `mut` binding [INFO] [stdout] --> src/terminal.rs:60:29 [INFO] [stdout] | [INFO] [stdout] 60 | let Position{mut x, mut y} = position; [INFO] [stdout] | ^^^^^ `mut` dereferences the type of this binding [INFO] [stdout] | [INFO] [stdout] help: this will change in edition 2024 [INFO] [stdout] --> src/terminal.rs:60:29 [INFO] [stdout] | [INFO] [stdout] 60 | let Position{mut x, mut y} = position; [INFO] [stdout] | ^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] error: dereferencing `mut` binding [INFO] [stdout] --> src/terminal.rs:60:22 [INFO] [stdout] | [INFO] [stdout] 60 | let Position{mut x, mut y} = position; [INFO] [stdout] | ^^^^^ `mut` dereferences the type of this binding [INFO] [stdout] | [INFO] [stdout] help: this will change in edition 2024 [INFO] [stdout] --> src/terminal.rs:60:22 [INFO] [stdout] | [INFO] [stdout] 60 | let Position{mut x, mut y} = position; [INFO] [stdout] | ^^^^^ [INFO] [stdout] = note: requested on the command line with `-D dereferencing-mut-binding` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] error: dereferencing `mut` binding [INFO] [stdout] --> src/terminal.rs:60:29 [INFO] [stdout] | [INFO] [stdout] 60 | let Position{mut x, mut y} = position; [INFO] [stdout] | ^^^^^ `mut` dereferences the type of this binding [INFO] [stdout] | [INFO] [stdout] help: this will change in edition 2024 [INFO] [stdout] --> src/terminal.rs:60:29 [INFO] [stdout] | [INFO] [stdout] 60 | let Position{mut x, mut y} = position; [INFO] [stdout] | ^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: variable does not need to be mutable [INFO] [stdout] --> src/editor.rs:313:13 [INFO] [stdout] | [INFO] [stdout] 313 | let mut offset = &mut self.offset; [INFO] [stdout] | ----^^^^^^ [INFO] [stdout] | | [INFO] [stdout] | help: remove this `mut` [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_mut)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: variable does not need to be mutable [INFO] [stdout] --> src/editor.rs:313:13 [INFO] [stdout] | [INFO] [stdout] 313 | let mut offset = &mut self.offset; [INFO] [stdout] | ----^^^^^^ [INFO] [stdout] | | [INFO] [stdout] | help: remove this `mut` [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_mut)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: variable does not need to be mutable [INFO] [stdout] --> src/terminal.rs:60:22 [INFO] [stdout] | [INFO] [stdout] 60 | let Position{mut x, mut y} = position; [INFO] [stdout] | ----^ [INFO] [stdout] | | [INFO] [stdout] | help: remove this `mut` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: variable does not need to be mutable [INFO] [stdout] --> src/terminal.rs:60:29 [INFO] [stdout] | [INFO] [stdout] 60 | let Position{mut x, mut y} = position; [INFO] [stdout] | ----^ [INFO] [stdout] | | [INFO] [stdout] | help: remove this `mut` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: variable does not need to be mutable [INFO] [stdout] --> src/terminal.rs:60:22 [INFO] [stdout] | [INFO] [stdout] 60 | let Position{mut x, mut y} = position; [INFO] [stdout] | ----^ [INFO] [stdout] | | [INFO] [stdout] | help: remove this `mut` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: variable does not need to be mutable [INFO] [stdout] --> src/terminal.rs:60:29 [INFO] [stdout] | [INFO] [stdout] 60 | let Position{mut x, mut y} = position; [INFO] [stdout] | ----^ [INFO] [stdout] | | [INFO] [stdout] | help: remove this `mut` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused borrow that must be used [INFO] [stdout] --> src/editor.rs:331:13 [INFO] [stdout] | [INFO] [stdout] 331 | &self.refresh_screen()?; [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] 331 | let _ = &self.refresh_screen()?; [INFO] [stdout] | +++++++ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused borrow that must be used [INFO] [stdout] --> src/editor.rs:331:13 [INFO] [stdout] | [INFO] [stdout] 331 | &self.refresh_screen()?; [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] 331 | let _ = &self.refresh_screen()?; [INFO] [stdout] | +++++++ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] error: aborting due to 2 previous errors; 5 warnings emitted [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] error: aborting due to 2 previous errors; 5 warnings emitted [INFO] [stdout] [INFO] [stdout] [INFO] [stderr] error: could not compile `rust_text_editor` (bin "rust_text_editor" test) due to 3 previous errors; 5 warnings emitted [INFO] [stderr] warning: build failed, waiting for other jobs to finish... [INFO] [stderr] error: could not compile `rust_text_editor` (bin "rust_text_editor") due to 3 previous errors; 5 warnings emitted [INFO] running `Command { std: "docker" "inspect" "c9b5425b9fdbc750a347cab21863436a5d41812f87fe2ca6fe4ae00210653dc4", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "c9b5425b9fdbc750a347cab21863436a5d41812f87fe2ca6fe4ae00210653dc4", kill_on_drop: false }` [INFO] [stdout] c9b5425b9fdbc750a347cab21863436a5d41812f87fe2ca6fe4ae00210653dc4