[INFO] cloning repository https://github.com/jason1105/rust_texteditor
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/jason1105/rust_texteditor" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fjason1105%2Frust_texteditor", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fjason1105%2Frust_texteditor'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 6abf20b40ad93afa4b2ecc8ebb97b82b7bb9c500
[INFO] building jason1105/rust_texteditor against master#11663cd3bfefef7d34e8f0892c250bf698049392+rustflags=-Dtail-expr-drop-order for pr-134523
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fjason1105%2Frust_texteditor" "/workspace/builds/worker-2-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-2-tc1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/jason1105/rust_texteditor on toolchain 11663cd3bfefef7d34e8f0892c250bf698049392
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+11663cd3bfefef7d34e8f0892c250bf698049392" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/jason1105/rust_texteditor
[INFO] finished tweaking git repo https://github.com/jason1105/rust_texteditor
[INFO] tweaked toml for git repo https://github.com/jason1105/rust_texteditor written to /workspace/builds/worker-2-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/jason1105/rust_texteditor 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" "+11663cd3bfefef7d34e8f0892c250bf698049392" "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-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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:f3a9d4ad9d972b27faf3965f35b62e55ba32bbce8f20bc8fe909558a86702fde" "/opt/rustwide/cargo-home/bin/cargo" "+11663cd3bfefef7d34e8f0892c250bf698049392" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 5a23e6c13df928214482a61a581e6a263ee130a08a6ccb04d88b9d206342183c
[INFO] running `Command { std: "docker" "start" "-a" "5a23e6c13df928214482a61a581e6a263ee130a08a6ccb04d88b9d206342183c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "5a23e6c13df928214482a61a581e6a263ee130a08a6ccb04d88b9d206342183c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "5a23e6c13df928214482a61a581e6a263ee130a08a6ccb04d88b9d206342183c", kill_on_drop: false }`
[INFO] [stdout] 5a23e6c13df928214482a61a581e6a263ee130a08a6ccb04d88b9d206342183c
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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 -Dtail-expr-drop-order" "-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:f3a9d4ad9d972b27faf3965f35b62e55ba32bbce8f20bc8fe909558a86702fde" "/opt/rustwide/cargo-home/bin/cargo" "+11663cd3bfefef7d34e8f0892c250bf698049392" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] e0c599cb60a01bb64bb214ec9bbf37e1b920925a832245b652620a1182f8ab88
[INFO] running `Command { std: "docker" "start" "-a" "e0c599cb60a01bb64bb214ec9bbf37e1b920925a832245b652620a1182f8ab88", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.120
[INFO] [stderr]    Compiling cfg-if v1.0.0
[INFO] [stderr]    Compiling log v0.4.14
[INFO] [stderr]    Compiling parking_lot_core v0.8.5
[INFO] [stderr]    Compiling signal-hook v0.3.13
[INFO] [stderr]    Compiling smallvec v1.8.0
[INFO] [stderr]    Compiling scopeguard v1.1.0
[INFO] [stderr]    Compiling bitflags v1.3.2
[INFO] [stderr]    Compiling either v1.6.1
[INFO] [stderr]    Compiling lazy_static v1.4.0
[INFO] [stderr]    Compiling instant v0.1.12
[INFO] [stderr]    Compiling lock_api v0.4.6
[INFO] [stderr]    Compiling itertools v0.10.3
[INFO] [stderr]    Compiling signal-hook-registry v1.4.0
[INFO] [stderr]    Compiling mio v0.7.14
[INFO] [stderr]    Compiling parking_lot v0.11.2
[INFO] [stderr]    Compiling signal-hook-mio v0.2.1
[INFO] [stderr]    Compiling crossterm v0.21.0
[INFO] [stderr]    Compiling rust_texteditor v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `crate::editor::output::EditorRows`
[INFO] [stdout]  --> src/editor.rs:5:5
[INFO] [stdout]   |
[INFO] [stdout] 5 | use crate::editor::output::EditorRows;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused doc comment
[INFO] [stdout]    --> src/editor/output.rs:689:1
[INFO] [stdout]     |
[INFO] [stdout] 689 | /// 这个宏的作用是将一些数据转换成一个结构体, 虽然传入宏的参数看起来像结构体, 但并不是结构体.
[INFO] [stdout]     | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ rustdoc does not generate documentation for macro invocations
[INFO] [stdout]     |
[INFO] [stdout]     = help: to document an item produced by a macro, the macro must produce the documentation as part of its expansion
[INFO] [stdout]     = note: `#[warn(unused_doc_comments)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::cell::RefCell`
[INFO] [stdout]   --> src/editor/output.rs:10:5
[INFO] [stdout]    |
[INFO] [stdout] 10 | use std::cell::RefCell;
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `Path`
[INFO] [stdout]   --> src/editor/output.rs:16:12
[INFO] [stdout]    |
[INFO] [stdout] 16 |     path::{Path, PathBuf},
[INFO] [stdout]    |            ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `thread` and `time`
[INFO] [stdout]    --> src/editor/output.rs:708:11
[INFO] [stdout]     |
[INFO] [stdout] 708 | use std::{thread, time};
[INFO] [stdout]     |           ^^^^^^  ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `super::reader::Reader`
[INFO] [stdout]    --> src/editor/output.rs:739:5
[INFO] [stdout]     |
[INFO] [stdout] 739 | use super::reader::Reader;
[INFO] [stdout]     |     ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `KeyEvent` and `KeyModifiers`
[INFO] [stdout]    --> src/editor/output.rs:740:24
[INFO] [stdout]     |
[INFO] [stdout] 740 | use crossterm::event::{KeyEvent, KeyModifiers};
[INFO] [stdout]     |                        ^^^^^^^^  ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `crate::log_print`
[INFO] [stdout]    --> src/editor/output.rs:773:5
[INFO] [stdout]     |
[INFO] [stdout] 773 | use crate::log_print;
[INFO] [stdout]     |     ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `crate::editor::output::Row`
[INFO] [stdout]    --> src/editor.rs:102:29
[INFO] [stdout]     |
[INFO] [stdout] 102 |                         use crate::editor::output::Row;
[INFO] [stdout]     |                             ^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `crate::editor::output::SyntaxHighlight`
[INFO] [stdout]   --> src/editor.rs:91:25
[INFO] [stdout]    |
[INFO] [stdout] 91 |                     use crate::editor::output::SyntaxHighlight;
[INFO] [stdout]    |                         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `itertools::Itertools`
[INFO] [stdout]  --> src/editor/output.rs:8:5
[INFO] [stdout]   |
[INFO] [stdout] 8 | use itertools::Itertools;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `get_render` is never used
[INFO] [stdout]    --> src/editor/output.rs:204:8
[INFO] [stdout]     |
[INFO] [stdout] 166 | impl EditorRows {
[INFO] [stdout]     | --------------- method in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 204 |     fn get_render(&self, at: usize) -> &String {
[INFO] [stdout]     |        ^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum `Direction` is never used
[INFO] [stdout]    --> src/editor/output.rs:668:6
[INFO] [stdout]     |
[INFO] [stdout] 668 | enum Direction {
[INFO] [stdout]     |      ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `file` is never read
[INFO] [stdout]    --> src/editor/output.rs:754:5
[INFO] [stdout]     |
[INFO] [stdout] 753 | struct Log {
[INFO] [stdout]     |        --- field in this struct
[INFO] [stdout] 754 |     file: Option<File>,
[INFO] [stdout]     |     ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `write` is never used
[INFO] [stdout]    --> src/editor/output.rs:766:8
[INFO] [stdout]     |
[INFO] [stdout] 757 | impl Log {
[INFO] [stdout]     | -------- method in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 766 |     fn write(&mut self, bytes: &[u8]) {
[INFO] [stdout]     |        ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]    --> src/editor.rs:133:21
[INFO] [stdout]     |
[INFO] [stdout] 133 |                     self.output.find();
[INFO] [stdout]     |                     ^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout]     = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]     |
[INFO] [stdout] 133 |                     let _ = self.output.find();
[INFO] [stdout]     |                     +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 3.26s
[INFO] running `Command { std: "docker" "inspect" "e0c599cb60a01bb64bb214ec9bbf37e1b920925a832245b652620a1182f8ab88", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e0c599cb60a01bb64bb214ec9bbf37e1b920925a832245b652620a1182f8ab88", kill_on_drop: false }`
[INFO] [stdout] e0c599cb60a01bb64bb214ec9bbf37e1b920925a832245b652620a1182f8ab88
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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 -Dtail-expr-drop-order" "-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:f3a9d4ad9d972b27faf3965f35b62e55ba32bbce8f20bc8fe909558a86702fde" "/opt/rustwide/cargo-home/bin/cargo" "+11663cd3bfefef7d34e8f0892c250bf698049392" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 0897c5fbf6d69fa01bf7b8c8018b4a34caa95cdb48fb7d1d2816b3b746bfbfa7
[INFO] running `Command { std: "docker" "start" "-a" "0897c5fbf6d69fa01bf7b8c8018b4a34caa95cdb48fb7d1d2816b3b746bfbfa7", kill_on_drop: false }`
[INFO] [stderr]    Compiling rust_texteditor v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `crate::editor::output::EditorRows`
[INFO] [stdout]  --> src/editor.rs:5:5
[INFO] [stdout]   |
[INFO] [stdout] 5 | use crate::editor::output::EditorRows;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused doc comment
[INFO] [stdout]    --> src/editor/output.rs:689:1
[INFO] [stdout]     |
[INFO] [stdout] 689 | /// 这个宏的作用是将一些数据转换成一个结构体, 虽然传入宏的参数看起来像结构体, 但并不是结构体.
[INFO] [stdout]     | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ rustdoc does not generate documentation for macro invocations
[INFO] [stdout]     |
[INFO] [stdout]     = help: to document an item produced by a macro, the macro must produce the documentation as part of its expansion
[INFO] [stdout]     = note: `#[warn(unused_doc_comments)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::cell::RefCell`
[INFO] [stdout]   --> src/editor/output.rs:10:5
[INFO] [stdout]    |
[INFO] [stdout] 10 | use std::cell::RefCell;
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `Path`
[INFO] [stdout]   --> src/editor/output.rs:16:12
[INFO] [stdout]    |
[INFO] [stdout] 16 |     path::{Path, PathBuf},
[INFO] [stdout]    |            ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `thread` and `time`
[INFO] [stdout]    --> src/editor/output.rs:708:11
[INFO] [stdout]     |
[INFO] [stdout] 708 | use std::{thread, time};
[INFO] [stdout]     |           ^^^^^^  ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `super::reader::Reader`
[INFO] [stdout]    --> src/editor/output.rs:739:5
[INFO] [stdout]     |
[INFO] [stdout] 739 | use super::reader::Reader;
[INFO] [stdout]     |     ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `KeyEvent` and `KeyModifiers`
[INFO] [stdout]    --> src/editor/output.rs:740:24
[INFO] [stdout]     |
[INFO] [stdout] 740 | use crossterm::event::{KeyEvent, KeyModifiers};
[INFO] [stdout]     |                        ^^^^^^^^  ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `crate::log_print`
[INFO] [stdout]    --> src/editor/output.rs:773:5
[INFO] [stdout]     |
[INFO] [stdout] 773 | use crate::log_print;
[INFO] [stdout]     |     ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `crate::editor::output::Row`
[INFO] [stdout]    --> src/editor.rs:102:29
[INFO] [stdout]     |
[INFO] [stdout] 102 |                         use crate::editor::output::Row;
[INFO] [stdout]     |                             ^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `crate::editor::output::SyntaxHighlight`
[INFO] [stdout]   --> src/editor.rs:91:25
[INFO] [stdout]    |
[INFO] [stdout] 91 |                     use crate::editor::output::SyntaxHighlight;
[INFO] [stdout]    |                         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `itertools::Itertools`
[INFO] [stdout]  --> src/editor/output.rs:8:5
[INFO] [stdout]   |
[INFO] [stdout] 8 | use itertools::Itertools;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `get_render` is never used
[INFO] [stdout]    --> src/editor/output.rs:204:8
[INFO] [stdout]     |
[INFO] [stdout] 166 | impl EditorRows {
[INFO] [stdout]     | --------------- method in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 204 |     fn get_render(&self, at: usize) -> &String {
[INFO] [stdout]     |        ^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum `Direction` is never used
[INFO] [stdout]    --> src/editor/output.rs:668:6
[INFO] [stdout]     |
[INFO] [stdout] 668 | enum Direction {
[INFO] [stdout]     |      ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `file` is never read
[INFO] [stdout]    --> src/editor/output.rs:754:5
[INFO] [stdout]     |
[INFO] [stdout] 753 | struct Log {
[INFO] [stdout]     |        --- field in this struct
[INFO] [stdout] 754 |     file: Option<File>,
[INFO] [stdout]     |     ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `write` is never used
[INFO] [stdout]    --> src/editor/output.rs:766:8
[INFO] [stdout]     |
[INFO] [stdout] 757 | impl Log {
[INFO] [stdout]     | -------- method in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 766 |     fn write(&mut self, bytes: &[u8]) {
[INFO] [stdout]     |        ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]    --> src/editor.rs:133:21
[INFO] [stdout]     |
[INFO] [stdout] 133 |                     self.output.find();
[INFO] [stdout]     |                     ^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout]     = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]     |
[INFO] [stdout] 133 |                     let _ = self.output.find();
[INFO] [stdout]     |                     +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.40s
[INFO] running `Command { std: "docker" "inspect" "0897c5fbf6d69fa01bf7b8c8018b4a34caa95cdb48fb7d1d2816b3b746bfbfa7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "0897c5fbf6d69fa01bf7b8c8018b4a34caa95cdb48fb7d1d2816b3b746bfbfa7", kill_on_drop: false }`
[INFO] [stdout] 0897c5fbf6d69fa01bf7b8c8018b4a34caa95cdb48fb7d1d2816b3b746bfbfa7