[INFO] cloning repository https://github.com/zackangelo/vibes-comp-lib
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/zackangelo/vibes-comp-lib" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fzackangelo%2Fvibes-comp-lib", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fzackangelo%2Fvibes-comp-lib'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 708dc5400a2d5f0fd418ac20a2e51d0cf1ba7b8f
[INFO] linting zackangelo/vibes-comp-lib against nightly for clippy-nonminimal_bool-denied
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fzackangelo%2Fvibes-comp-lib" "/workspace/builds/worker-7-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-7-tc1/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/zackangelo/vibes-comp-lib
[INFO] finished tweaking git repo https://github.com/zackangelo/vibes-comp-lib
[INFO] tweaked toml for git repo https://github.com/zackangelo/vibes-comp-lib written to /workspace/builds/worker-7-tc1/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/zackangelo/vibes-comp-lib on toolchain nightly
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+nightly" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/zackangelo/vibes-comp-lib 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" "+nightly" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded anyhow v1.0.94
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+nightly" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] afb7fae7dcd31265911332ad5cef6b6b9140e00cebcd935fc0ca4b582338ecd5
[INFO] running `Command { std: "docker" "start" "-a" "afb7fae7dcd31265911332ad5cef6b6b9140e00cebcd935fc0ca4b582338ecd5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "afb7fae7dcd31265911332ad5cef6b6b9140e00cebcd935fc0ca4b582338ecd5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "afb7fae7dcd31265911332ad5cef6b6b9140e00cebcd935fc0ca4b582338ecd5", kill_on_drop: false }`
[INFO] [stdout] afb7fae7dcd31265911332ad5cef6b6b9140e00cebcd935fc0ca4b582338ecd5
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+nightly" "clippy" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] f4a30fe0a6e719bcd065b181d4f78d30427b40e292b19fd6865ce0549647756f
[INFO] running `Command { std: "docker" "start" "-a" "f4a30fe0a6e719bcd065b181d4f78d30427b40e292b19fd6865ce0549647756f", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.169
[INFO] [stderr]    Compiling serde v1.0.216
[INFO] [stderr]    Compiling serde_json v1.0.133
[INFO] [stderr]    Compiling anyhow v1.0.94
[INFO] [stderr]     Checking convert_case v0.6.0
[INFO] [stderr]    Compiling syn v2.0.90
[INFO] [stderr]    Compiling proc-macro-error-attr v1.0.4
[INFO] [stderr]    Compiling syn v1.0.109
[INFO] [stderr]     Checking atty v0.2.14
[INFO] [stderr]     Checking clap v2.34.0
[INFO] [stderr]    Compiling serde_derive v1.0.216
[INFO] [stderr]    Compiling proc-macro-error v1.0.4
[INFO] [stderr]    Compiling structopt-derive v0.4.18
[INFO] [stderr]     Checking structopt v0.3.26
[INFO] [stderr]     Checking serde_yaml v0.8.26
[INFO] [stderr]     Checking viber v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: matching on `Some` with `ok()` is redundant
[INFO] [stdout]   --> src/enrichments.rs:39:9
[INFO] [stdout]    |
[INFO] [stdout] 39 |         if let Some(str) = fs::read_to_string(path).ok() {
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#match_result_ok
[INFO] [stdout]    = note: `#[warn(clippy::match_result_ok)]` on by default
[INFO] [stdout] help: consider matching on `Ok(str)` and removing the call to `ok` instead
[INFO] [stdout]    |
[INFO] [stdout] 39 -         if let Some(str) = fs::read_to_string(path).ok() {
[INFO] [stdout] 39 +         if let Ok(str) = fs::read_to_string(path) {
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: matching on `Some` with `ok()` is redundant
[INFO] [stdout]   --> src/enrichments.rs:53:9
[INFO] [stdout]    |
[INFO] [stdout] 53 |         if let Some(str) = fs::read_to_string(path).ok() {
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#match_result_ok
[INFO] [stdout] help: consider matching on `Ok(str)` and removing the call to `ok` instead
[INFO] [stdout]    |
[INFO] [stdout] 53 -         if let Some(str) = fs::read_to_string(path).ok() {
[INFO] [stdout] 53 +         if let Ok(str) = fs::read_to_string(path) {
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of `unwrap_or` to construct default value
[INFO] [stdout]   --> src/vibes/primitives.rs:50:62
[INFO] [stdout]    |
[INFO] [stdout] 50 |     let files : Vec<String> = list_files_in_directory(&path).unwrap_or(Vec::new());
[INFO] [stdout]    |                                                              ^^^^^^^^^^^^^^^^^^^^^ help: try: `unwrap_or_default()`
[INFO] [stdout]    |
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#unwrap_or_default
[INFO] [stdout]    = note: `#[warn(clippy::unwrap_or_default)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: this expression creates a reference which is immediately dereferenced by the compiler
[INFO] [stdout]   --> src/vibes/primitives.rs:64:46
[INFO] [stdout]    |
[INFO] [stdout] 64 |     if let Some(str) = read_description_file(&name) {
[INFO] [stdout]    |                                              ^^^^^ help: change this to: `name`
[INFO] [stdout]    |
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_borrow
[INFO] [stdout]    = note: `#[warn(clippy::needless_borrow)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: this expression creates a reference which is immediately dereferenced by the compiler
[INFO] [stdout]    --> src/vibes/primitives.rs:149:46
[INFO] [stdout]     |
[INFO] [stdout] 149 |     if let Some(str) = read_description_file(&name) {
[INFO] [stdout]     |                                              ^^^^^ help: change this to: `name`
[INFO] [stdout]     |
[INFO] [stdout]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_borrow
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of `unwrap_or` to construct default value
[INFO] [stdout]   --> src/vibes/sections.rs:39:62
[INFO] [stdout]    |
[INFO] [stdout] 39 |     let files : Vec<String> = list_files_in_directory(&path).unwrap_or(Vec::new());
[INFO] [stdout]    |                                                              ^^^^^^^^^^^^^^^^^^^^^ help: try: `unwrap_or_default()`
[INFO] [stdout]    |
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#unwrap_or_default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: matching on `Some` with `ok()` is redundant
[INFO] [stdout]   --> src/enrichments.rs:39:9
[INFO] [stdout]    |
[INFO] [stdout] 39 |         if let Some(str) = fs::read_to_string(path).ok() {
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#match_result_ok
[INFO] [stdout]    = note: `#[warn(clippy::match_result_ok)]` on by default
[INFO] [stdout] help: consider matching on `Ok(str)` and removing the call to `ok` instead
[INFO] [stdout]    |
[INFO] [stdout] 39 -         if let Some(str) = fs::read_to_string(path).ok() {
[INFO] [stdout] 39 +         if let Ok(str) = fs::read_to_string(path) {
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: matching on `Some` with `ok()` is redundant
[INFO] [stdout]   --> src/enrichments.rs:53:9
[INFO] [stdout]    |
[INFO] [stdout] 53 |         if let Some(str) = fs::read_to_string(path).ok() {
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#match_result_ok
[INFO] [stdout] help: consider matching on `Ok(str)` and removing the call to `ok` instead
[INFO] [stdout]    |
[INFO] [stdout] 53 -         if let Some(str) = fs::read_to_string(path).ok() {
[INFO] [stdout] 53 +         if let Ok(str) = fs::read_to_string(path) {
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of `unwrap_or_else` to construct default value
[INFO] [stdout]   --> src/vibes/sections.rs:82:69
[INFO] [stdout]    |
[INFO] [stdout] 82 |         registry_dependencies: meta.clone().map(|m| m.dependencies).unwrap_or_else(Vec::new),
[INFO] [stdout]    |                                                                     ^^^^^^^^^^^^^^^^^^^^^^^^ help: try: `unwrap_or_default()`
[INFO] [stdout]    |
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#unwrap_or_default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of `unwrap_or_else` to construct default value
[INFO] [stdout]   --> src/vibes/sections.rs:83:61
[INFO] [stdout]    |
[INFO] [stdout] 83 |         dependencies: meta.map(|m| m.registry_dependencies).unwrap_or_else(Vec::new),
[INFO] [stdout]    |                                                             ^^^^^^^^^^^^^^^^^^^^^^^^ help: try: `unwrap_or_default()`
[INFO] [stdout]    |
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#unwrap_or_default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of `unwrap_or` to construct default value
[INFO] [stdout]   --> src/vibes/primitives.rs:50:62
[INFO] [stdout]    |
[INFO] [stdout] 50 |     let files : Vec<String> = list_files_in_directory(&path).unwrap_or(Vec::new());
[INFO] [stdout]    |                                                              ^^^^^^^^^^^^^^^^^^^^^ help: try: `unwrap_or_default()`
[INFO] [stdout]    |
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#unwrap_or_default
[INFO] [stdout]    = note: `#[warn(clippy::unwrap_or_default)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: this expression creates a reference which is immediately dereferenced by the compiler
[INFO] [stdout]   --> src/vibes/primitives.rs:64:46
[INFO] [stdout]    |
[INFO] [stdout] 64 |     if let Some(str) = read_description_file(&name) {
[INFO] [stdout]    |                                              ^^^^^ help: change this to: `name`
[INFO] [stdout]    |
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_borrow
[INFO] [stdout]    = note: `#[warn(clippy::needless_borrow)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: this expression creates a reference which is immediately dereferenced by the compiler
[INFO] [stdout]    --> src/vibes/primitives.rs:149:46
[INFO] [stdout]     |
[INFO] [stdout] 149 |     if let Some(str) = read_description_file(&name) {
[INFO] [stdout]     |                                              ^^^^^ help: change this to: `name`
[INFO] [stdout]     |
[INFO] [stdout]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_borrow
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: this boolean expression can be simplified
[INFO] [stdout]   --> src/utils.rs:83:8
[INFO] [stdout]    |
[INFO] [stdout] 83 |     if !fs::metadata(path).is_ok() {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try: `fs::metadata(path).is_err()`
[INFO] [stdout]    |
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#nonminimal_bool
[INFO] [stdout]    = note: `#[warn(clippy::nonminimal_bool)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of `unwrap_or` to construct default value
[INFO] [stdout]   --> src/vibes/sections.rs:39:62
[INFO] [stdout]    |
[INFO] [stdout] 39 |     let files : Vec<String> = list_files_in_directory(&path).unwrap_or(Vec::new());
[INFO] [stdout]    |                                                              ^^^^^^^^^^^^^^^^^^^^^ help: try: `unwrap_or_default()`
[INFO] [stdout]    |
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#unwrap_or_default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of `unwrap_or_else` to construct default value
[INFO] [stdout]   --> src/vibes/sections.rs:82:69
[INFO] [stdout]    |
[INFO] [stdout] 82 |         registry_dependencies: meta.clone().map(|m| m.dependencies).unwrap_or_else(Vec::new),
[INFO] [stdout]    |                                                                     ^^^^^^^^^^^^^^^^^^^^^^^^ help: try: `unwrap_or_default()`
[INFO] [stdout]    |
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#unwrap_or_default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of `unwrap_or_else` to construct default value
[INFO] [stdout]   --> src/vibes/sections.rs:83:61
[INFO] [stdout]    |
[INFO] [stdout] 83 |         dependencies: meta.map(|m| m.registry_dependencies).unwrap_or_else(Vec::new),
[INFO] [stdout]    |                                                             ^^^^^^^^^^^^^^^^^^^^^^^^ help: try: `unwrap_or_default()`
[INFO] [stdout]    |
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#unwrap_or_default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: this boolean expression can be simplified
[INFO] [stdout]   --> src/utils.rs:83:8
[INFO] [stdout]    |
[INFO] [stdout] 83 |     if !fs::metadata(path).is_ok() {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try: `fs::metadata(path).is_err()`
[INFO] [stdout]    |
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#nonminimal_bool
[INFO] [stdout]    = note: `#[warn(clippy::nonminimal_bool)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: calling `push_str()` using a single-character string literal
[INFO] [stdout]   --> src/mxl/components.rs:97:13
[INFO] [stdout]    |
[INFO] [stdout] 97 |             output.push_str("\n");
[INFO] [stdout]    |             ^^^^^^^^^^^^^^^^^^^^^ help: consider using `push` with a character literal: `output.push('\n')`
[INFO] [stdout]    |
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#single_char_add_str
[INFO] [stdout]    = note: `#[warn(clippy::single_char_add_str)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: calling `push_str()` using a single-character string literal
[INFO] [stdout]    --> src/mxl/components.rs:103:9
[INFO] [stdout]     |
[INFO] [stdout] 103 |         output.push_str("\n");
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^^^^ help: consider using `push` with a character literal: `output.push('\n')`
[INFO] [stdout]     |
[INFO] [stdout]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#single_char_add_str
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: calling `push_str()` using a single-character string literal
[INFO] [stdout]    --> src/mxl/components.rs:109:9
[INFO] [stdout]     |
[INFO] [stdout] 109 |         output.push_str("\n");
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^^^^ help: consider using `push` with a character literal: `output.push('\n')`
[INFO] [stdout]     |
[INFO] [stdout]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#single_char_add_str
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: calling `push_str()` using a single-character string literal
[INFO] [stdout]    --> src/mxl/components.rs:111:5
[INFO] [stdout]     |
[INFO] [stdout] 111 |     output.push_str("\n");
[INFO] [stdout]     |     ^^^^^^^^^^^^^^^^^^^^^ help: consider using `push` with a character literal: `output.push('\n')`
[INFO] [stdout]     |
[INFO] [stdout]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#single_char_add_str
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: this expression creates a reference which is immediately dereferenced by the compiler
[INFO] [stdout]    --> src/mxl/components.rs:131:44
[INFO] [stdout]     |
[INFO] [stdout] 131 |             output.push_str(&indent_string(&str, 4));
[INFO] [stdout]     |                                            ^^^^ help: change this to: `str`
[INFO] [stdout]     |
[INFO] [stdout]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_borrow
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: calling `push_str()` using a single-character string literal
[INFO] [stdout]    --> src/mxl/components.rs:132:13
[INFO] [stdout]     |
[INFO] [stdout] 132 |             output.push_str("\n");
[INFO] [stdout]     |             ^^^^^^^^^^^^^^^^^^^^^ help: consider using `push` with a character literal: `output.push('\n')`
[INFO] [stdout]     |
[INFO] [stdout]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#single_char_add_str
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: calling `push_str()` using a single-character string literal
[INFO] [stdout]    --> src/mxl/components.rs:139:13
[INFO] [stdout]     |
[INFO] [stdout] 139 |             output.push_str("\n");
[INFO] [stdout]     |             ^^^^^^^^^^^^^^^^^^^^^ help: consider using `push` with a character literal: `output.push('\n')`
[INFO] [stdout]     |
[INFO] [stdout]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#single_char_add_str
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: calling `push_str()` using a single-character string literal
[INFO] [stdout]    --> src/mxl/components.rs:146:9
[INFO] [stdout]     |
[INFO] [stdout] 146 |         output.push_str("\n");
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^^^^ help: consider using `push` with a character literal: `output.push('\n')`
[INFO] [stdout]     |
[INFO] [stdout]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#single_char_add_str
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: calling `push_str()` using a single-character string literal
[INFO] [stdout]    --> src/mxl/components.rs:149:5
[INFO] [stdout]     |
[INFO] [stdout] 149 |     output.push_str("\n");
[INFO] [stdout]     |     ^^^^^^^^^^^^^^^^^^^^^ help: consider using `push` with a character literal: `output.push('\n')`
[INFO] [stdout]     |
[INFO] [stdout]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#single_char_add_str
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: this expression creates a reference which is immediately dereferenced by the compiler
[INFO] [stdout]    --> src/mxl/components.rs:161:44
[INFO] [stdout]     |
[INFO] [stdout] 161 |             output.push_str(&indent_string(&str, 4));
[INFO] [stdout]     |                                            ^^^^ help: change this to: `str`
[INFO] [stdout]     |
[INFO] [stdout]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_borrow
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: calling `push_str()` using a single-character string literal
[INFO] [stdout]    --> src/mxl/components.rs:162:13
[INFO] [stdout]     |
[INFO] [stdout] 162 |             output.push_str("\n");
[INFO] [stdout]     |             ^^^^^^^^^^^^^^^^^^^^^ help: consider using `push` with a character literal: `output.push('\n')`
[INFO] [stdout]     |
[INFO] [stdout]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#single_char_add_str
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: calling `push_str()` using a single-character string literal
[INFO] [stdout]    --> src/mxl/components.rs:169:13
[INFO] [stdout]     |
[INFO] [stdout] 169 |             output.push_str("\n");
[INFO] [stdout]     |             ^^^^^^^^^^^^^^^^^^^^^ help: consider using `push` with a character literal: `output.push('\n')`
[INFO] [stdout]     |
[INFO] [stdout]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#single_char_add_str
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: calling `push_str()` using a single-character string literal
[INFO] [stdout]    --> src/mxl/components.rs:174:9
[INFO] [stdout]     |
[INFO] [stdout] 174 |         output.push_str("\n");
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^^^^ help: consider using `push` with a character literal: `output.push('\n')`
[INFO] [stdout]     |
[INFO] [stdout]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#single_char_add_str
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: calling `push_str()` using a single-character string literal
[INFO] [stdout]    --> src/mxl/components.rs:177:5
[INFO] [stdout]     |
[INFO] [stdout] 177 |     output.push_str("\n");
[INFO] [stdout]     |     ^^^^^^^^^^^^^^^^^^^^^ help: consider using `push` with a character literal: `output.push('\n')`
[INFO] [stdout]     |
[INFO] [stdout]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#single_char_add_str
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: this boolean expression can be simplified
[INFO] [stdout]   --> src/mxl/mod.rs:15:8
[INFO] [stdout]    |
[INFO] [stdout] 15 |     if !fs::metadata("./out").is_ok() {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try: `fs::metadata("./out").is_err()`
[INFO] [stdout]    |
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#nonminimal_bool
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: calling `push_str()` using a single-character string literal
[INFO] [stdout]   --> src/mxl/components.rs:97:13
[INFO] [stdout]    |
[INFO] [stdout] 97 |             output.push_str("\n");
[INFO] [stdout]    |             ^^^^^^^^^^^^^^^^^^^^^ help: consider using `push` with a character literal: `output.push('\n')`
[INFO] [stdout]    |
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#single_char_add_str
[INFO] [stdout]    = note: `#[warn(clippy::single_char_add_str)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: calling `push_str()` using a single-character string literal
[INFO] [stdout]    --> src/mxl/components.rs:103:9
[INFO] [stdout]     |
[INFO] [stdout] 103 |         output.push_str("\n");
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^^^^ help: consider using `push` with a character literal: `output.push('\n')`
[INFO] [stdout]     |
[INFO] [stdout]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#single_char_add_str
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: calling `push_str()` using a single-character string literal
[INFO] [stdout]    --> src/mxl/components.rs:109:9
[INFO] [stdout]     |
[INFO] [stdout] 109 |         output.push_str("\n");
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^^^^ help: consider using `push` with a character literal: `output.push('\n')`
[INFO] [stdout]     |
[INFO] [stdout]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#single_char_add_str
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: calling `push_str()` using a single-character string literal
[INFO] [stdout]    --> src/mxl/components.rs:111:5
[INFO] [stdout]     |
[INFO] [stdout] 111 |     output.push_str("\n");
[INFO] [stdout]     |     ^^^^^^^^^^^^^^^^^^^^^ help: consider using `push` with a character literal: `output.push('\n')`
[INFO] [stdout]     |
[INFO] [stdout]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#single_char_add_str
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: this expression creates a reference which is immediately dereferenced by the compiler
[INFO] [stdout]    --> src/mxl/components.rs:131:44
[INFO] [stdout]     |
[INFO] [stdout] 131 |             output.push_str(&indent_string(&str, 4));
[INFO] [stdout]     |                                            ^^^^ help: change this to: `str`
[INFO] [stdout]     |
[INFO] [stdout]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_borrow
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: calling `push_str()` using a single-character string literal
[INFO] [stdout]    --> src/mxl/components.rs:132:13
[INFO] [stdout]     |
[INFO] [stdout] 132 |             output.push_str("\n");
[INFO] [stdout]     |             ^^^^^^^^^^^^^^^^^^^^^ help: consider using `push` with a character literal: `output.push('\n')`
[INFO] [stdout]     |
[INFO] [stdout]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#single_char_add_str
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: calling `push_str()` using a single-character string literal
[INFO] [stdout]    --> src/mxl/components.rs:139:13
[INFO] [stdout]     |
[INFO] [stdout] 139 |             output.push_str("\n");
[INFO] [stdout]     |             ^^^^^^^^^^^^^^^^^^^^^ help: consider using `push` with a character literal: `output.push('\n')`
[INFO] [stdout]     |
[INFO] [stdout]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#single_char_add_str
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: calling `push_str()` using a single-character string literal
[INFO] [stdout]    --> src/mxl/components.rs:146:9
[INFO] [stdout]     |
[INFO] [stdout] 146 |         output.push_str("\n");
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^^^^ help: consider using `push` with a character literal: `output.push('\n')`
[INFO] [stdout]     |
[INFO] [stdout]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#single_char_add_str
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: calling `push_str()` using a single-character string literal
[INFO] [stdout]    --> src/mxl/components.rs:149:5
[INFO] [stdout]     |
[INFO] [stdout] 149 |     output.push_str("\n");
[INFO] [stdout]     |     ^^^^^^^^^^^^^^^^^^^^^ help: consider using `push` with a character literal: `output.push('\n')`
[INFO] [stdout]     |
[INFO] [stdout]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#single_char_add_str
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: this expression creates a reference which is immediately dereferenced by the compiler
[INFO] [stdout]    --> src/mxl/components.rs:161:44
[INFO] [stdout]     |
[INFO] [stdout] 161 |             output.push_str(&indent_string(&str, 4));
[INFO] [stdout]     |                                            ^^^^ help: change this to: `str`
[INFO] [stdout]     |
[INFO] [stdout]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_borrow
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: calling `push_str()` using a single-character string literal
[INFO] [stdout]    --> src/mxl/components.rs:162:13
[INFO] [stdout]     |
[INFO] [stdout] 162 |             output.push_str("\n");
[INFO] [stdout]     |             ^^^^^^^^^^^^^^^^^^^^^ help: consider using `push` with a character literal: `output.push('\n')`
[INFO] [stdout]     |
[INFO] [stdout]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#single_char_add_str
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: calling `push_str()` using a single-character string literal
[INFO] [stdout]    --> src/mxl/components.rs:169:13
[INFO] [stdout]     |
[INFO] [stdout] 169 |             output.push_str("\n");
[INFO] [stdout]     |             ^^^^^^^^^^^^^^^^^^^^^ help: consider using `push` with a character literal: `output.push('\n')`
[INFO] [stdout]     |
[INFO] [stdout]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#single_char_add_str
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: calling `push_str()` using a single-character string literal
[INFO] [stdout]    --> src/mxl/components.rs:174:9
[INFO] [stdout]     |
[INFO] [stdout] 174 |         output.push_str("\n");
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^^^^ help: consider using `push` with a character literal: `output.push('\n')`
[INFO] [stdout]     |
[INFO] [stdout]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#single_char_add_str
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: calling `push_str()` using a single-character string literal
[INFO] [stdout]    --> src/mxl/components.rs:177:5
[INFO] [stdout]     |
[INFO] [stdout] 177 |     output.push_str("\n");
[INFO] [stdout]     |     ^^^^^^^^^^^^^^^^^^^^^ help: consider using `push` with a character literal: `output.push('\n')`
[INFO] [stdout]     |
[INFO] [stdout]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#single_char_add_str
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: this boolean expression can be simplified
[INFO] [stdout]   --> src/mxl/mod.rs:15:8
[INFO] [stdout]    |
[INFO] [stdout] 15 |     if !fs::metadata("./out").is_ok() {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try: `fs::metadata("./out").is_err()`
[INFO] [stdout]    |
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#nonminimal_bool
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: this import is redundant
[INFO] [stdout]  --> src/main.rs:1:1
[INFO] [stdout]   |
[INFO] [stdout] 1 | use libviber;
[INFO] [stdout]   | ^^^^^^^^^^^^^ help: remove it entirely
[INFO] [stdout]   |
[INFO] [stdout]   = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#single_component_path_imports
[INFO] [stdout]   = note: `#[warn(clippy::single_component_path_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `debug` is never read
[INFO] [stdout]   --> src/main.rs:16:5
[INFO] [stdout]    |
[INFO] [stdout] 13 | struct Opt {
[INFO] [stdout]    |        --- field in this struct
[INFO] [stdout] ...
[INFO] [stdout] 16 |     debug: bool,
[INFO] [stdout]    |     ^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Opt` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: this import is redundant
[INFO] [stdout]  --> src/main.rs:1:1
[INFO] [stdout]   |
[INFO] [stdout] 1 | use libviber;
[INFO] [stdout]   | ^^^^^^^^^^^^^ help: remove it entirely
[INFO] [stdout]   |
[INFO] [stdout]   = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#single_component_path_imports
[INFO] [stdout]   = note: `#[warn(clippy::single_component_path_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `debug` is never read
[INFO] [stdout]   --> src/main.rs:16:5
[INFO] [stdout]    |
[INFO] [stdout] 13 | struct Opt {
[INFO] [stdout]    |        --- field in this struct
[INFO] [stdout] ...
[INFO] [stdout] 16 |     debug: bool,
[INFO] [stdout]    |     ^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Opt` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 11.59s
[INFO] running `Command { std: "docker" "inspect" "f4a30fe0a6e719bcd065b181d4f78d30427b40e292b19fd6865ce0549647756f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f4a30fe0a6e719bcd065b181d4f78d30427b40e292b19fd6865ce0549647756f", kill_on_drop: false }`
[INFO] [stdout] f4a30fe0a6e719bcd065b181d4f78d30427b40e292b19fd6865ce0549647756f