[INFO] cloning repository https://github.com/dav-anderson/cargo-piston
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/dav-anderson/cargo-piston" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fdav-anderson%2Fcargo-piston", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fdav-anderson%2Fcargo-piston'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 21ebafc12119c29e1cb4f5b420d1f0a9b93512be
[INFO] checking dav-anderson/cargo-piston against master#377656d3dd3f9c23a9c8713e163f4365a5261a84 for pr-146470-3
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fdav-anderson%2Fcargo-piston" "/workspace/builds/worker-5-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-5-tc1/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/dav-anderson/cargo-piston
[INFO] finished tweaking git repo https://github.com/dav-anderson/cargo-piston
[INFO] tweaked toml for git repo https://github.com/dav-anderson/cargo-piston written to /workspace/builds/worker-5-tc1/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/dav-anderson/cargo-piston on toolchain 377656d3dd3f9c23a9c8713e163f4365a5261a84
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+377656d3dd3f9c23a9c8713e163f4365a5261a84" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/dav-anderson/cargo-piston 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" "+377656d3dd3f9c23a9c8713e163f4365a5261a84" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
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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@sha256:845e597a41426bbf2703be69acdb67d10b6de511142d05cba7bbe119c898b2c7" "/opt/rustwide/cargo-home/bin/cargo" "+377656d3dd3f9c23a9c8713e163f4365a5261a84" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
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[INFO] running `Command { std: "docker" "start" "-a" "b831f6f80bc8b89c242de4fc077ad9cb4ae6935764bf1b1de4ee83179a42e1b0", kill_on_drop: false }`
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[INFO] [stderr]     Checking cargo-piston v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `CommandFactory`
[INFO] [stdout]  --> src/main.rs:2:20
[INFO] [stdout]   |
[INFO] [stdout] 2 | use clap::{Parser, CommandFactory, FromArgMatches};
[INFO] [stdout]   |                    ^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `crate::error::PistonError`
[INFO] [stdout]   --> src/main.rs:10:5
[INFO] [stdout]    |
[INFO] [stdout] 10 | use crate::error::PistonError;
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `DependencyKind`
[INFO] [stdout]  --> src/linux.rs:1:49
[INFO] [stdout]   |
[INFO] [stdout] 1 | use cargo_metadata::{Metadata, MetadataCommand, DependencyKind};
[INFO] [stdout]   |                                                 ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::env`
[INFO] [stdout]  --> src/windows.rs:2:5
[INFO] [stdout]   |
[INFO] [stdout] 2 | use std::env;
[INFO] [stdout]   |     ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `serde_json::Value`
[INFO] [stdout]  --> src/windows.rs:8:5
[INFO] [stdout]   |
[INFO] [stdout] 8 | use serde_json::Value;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `PathBuf`
[INFO] [stdout]  --> src/helper.rs:1:17
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::path::{PathBuf, Path};
[INFO] [stdout]   |                 ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `CommandFactory`
[INFO] [stdout]  --> src/main.rs:2:20
[INFO] [stdout]   |
[INFO] [stdout] 2 | use clap::{Parser, CommandFactory, FromArgMatches};
[INFO] [stdout]   |                    ^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `crate::error::PistonError`
[INFO] [stdout]   --> src/main.rs:10:5
[INFO] [stdout]    |
[INFO] [stdout] 10 | use crate::error::PistonError;
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `DependencyKind`
[INFO] [stdout]  --> src/linux.rs:1:49
[INFO] [stdout]   |
[INFO] [stdout] 1 | use cargo_metadata::{Metadata, MetadataCommand, DependencyKind};
[INFO] [stdout]   |                                                 ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::env`
[INFO] [stdout]  --> src/windows.rs:2:5
[INFO] [stdout]   |
[INFO] [stdout] 2 | use std::env;
[INFO] [stdout]   |     ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `serde_json::Value`
[INFO] [stdout]  --> src/windows.rs:8:5
[INFO] [stdout]   |
[INFO] [stdout] 8 | use serde_json::Value;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `PathBuf`
[INFO] [stdout]  --> src/helper.rs:1:17
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::path::{PathBuf, Path};
[INFO] [stdout]   |                 ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `FromArgMatches`
[INFO] [stdout]  --> src/main.rs:2:36
[INFO] [stdout]   |
[INFO] [stdout] 2 | use clap::{Parser, CommandFactory, FromArgMatches};
[INFO] [stdout]   |                                    ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `output`
[INFO] [stdout]    --> src/linux.rs:121:17
[INFO] [stdout]     |
[INFO] [stdout] 121 |             let output = Command::new("bash")
[INFO] [stdout]     |                 ^^^^^^ help: if this is intentional, prefix it with an underscore: `_output`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `output`
[INFO] [stdout]    --> src/linux.rs:132:17
[INFO] [stdout]     |
[INFO] [stdout] 132 |             let output = Command::new("bash")
[INFO] [stdout]     |                 ^^^^^^ help: if this is intentional, prefix it with an underscore: `_output`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `output`
[INFO] [stdout]    --> src/windows.rs:196:13
[INFO] [stdout]     |
[INFO] [stdout] 196 |         let output = Command::new("bash")
[INFO] [stdout]     |             ^^^^^^ help: if this is intentional, prefix it with an underscore: `_output`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `cmd`
[INFO] [stdout]    --> src/main.rs:269:13
[INFO] [stdout]     |
[INFO] [stdout] 269 |         let cmd = Subcommand::new(args.common.subcommand_args)?;
[INFO] [stdout]     |             ^^^ help: if this is intentional, prefix it with an underscore: `_cmd`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `release` and `target` are never read
[INFO] [stdout]  --> src/android.rs:3:5
[INFO] [stdout]   |
[INFO] [stdout] 2 | pub struct AndroidBuilder {
[INFO] [stdout]   |            -------------- fields in this struct
[INFO] [stdout] 3 |     release: bool,
[INFO] [stdout]   |     ^^^^^^^
[INFO] [stdout] 4 |     target: String,
[INFO] [stdout]   |     ^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `AndroidRunner` is never constructed
[INFO] [stdout]   --> src/android.rs:22:8
[INFO] [stdout]    |
[INFO] [stdout] 22 | struct AndroidRunner{
[INFO] [stdout]    |        ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function `new` is never used
[INFO] [stdout]   --> src/android.rs:27:8
[INFO] [stdout]    |
[INFO] [stdout] 26 | impl AndroidRunner{
[INFO] [stdout]    | ------------------ associated function in this implementation
[INFO] [stdout] 27 |     fn new() -> Self{
[INFO] [stdout]    |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `release` and `target` are never read
[INFO] [stdout]   --> src/ios.rs:18:5
[INFO] [stdout]    |
[INFO] [stdout] 17 | pub struct IOSBuilder {
[INFO] [stdout]    |            ---------- fields in this struct
[INFO] [stdout] 18 |     release: bool,
[INFO] [stdout]    |     ^^^^^^^
[INFO] [stdout] 19 |     target: String,
[INFO] [stdout]    |     ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `IOSRunner` is never constructed
[INFO] [stdout]   --> src/ios.rs:44:8
[INFO] [stdout]    |
[INFO] [stdout] 44 | struct IOSRunner{
[INFO] [stdout]    |        ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function `new` is never used
[INFO] [stdout]   --> src/ios.rs:49:8
[INFO] [stdout]    |
[INFO] [stdout] 48 | impl IOSRunner {
[INFO] [stdout]    | -------------- associated function in this implementation
[INFO] [stdout] 49 |     fn new() -> Self{
[INFO] [stdout]    |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `icon_path` and `app_name` are never read
[INFO] [stdout]   --> src/linux.rs:15:5
[INFO] [stdout]    |
[INFO] [stdout] 10 | pub struct LinuxBuilder {
[INFO] [stdout]    |            ------------ fields in this struct
[INFO] [stdout] ...
[INFO] [stdout] 15 |     icon_path: Option<String>,
[INFO] [stdout]    |     ^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 19 |     app_name: Option<String>,
[INFO] [stdout]    |     ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `LinuxRunner` is never constructed
[INFO] [stdout]    --> src/linux.rs:149:8
[INFO] [stdout]     |
[INFO] [stdout] 149 | struct LinuxRunner{
[INFO] [stdout]     |        ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function `new` is never used
[INFO] [stdout]    --> src/linux.rs:154:8
[INFO] [stdout]     |
[INFO] [stdout] 153 | impl LinuxRunner{
[INFO] [stdout]     | ---------------- associated function in this implementation
[INFO] [stdout] 154 |     fn new() -> Self {
[INFO] [stdout]     |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `release` and `target` are never read
[INFO] [stdout]  --> src/macos.rs:3:5
[INFO] [stdout]   |
[INFO] [stdout] 2 | pub struct MacOSBuilder {
[INFO] [stdout]   |            ------------ fields in this struct
[INFO] [stdout] 3 |     release: bool,
[INFO] [stdout]   |     ^^^^^^^
[INFO] [stdout] 4 |     target: String,
[INFO] [stdout]   |     ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `MacOSRunner` is never constructed
[INFO] [stdout]   --> src/macos.rs:22:8
[INFO] [stdout]    |
[INFO] [stdout] 22 | struct MacOSRunner{
[INFO] [stdout]    |        ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function `new` is never used
[INFO] [stdout]   --> src/macos.rs:27:8
[INFO] [stdout]    |
[INFO] [stdout] 26 | impl MacOSRunner {
[INFO] [stdout]    | ---------------- associated function in this implementation
[INFO] [stdout] 27 |     fn new() -> Self {
[INFO] [stdout]    |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> src/linux.rs:28:5
[INFO] [stdout]    |
[INFO] [stdout] 28 |     op.pre_build();
[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)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]    |
[INFO] [stdout] 28 |     let _ = op.pre_build();
[INFO] [stdout]    |     +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> src/linux.rs:31:5
[INFO] [stdout]    |
[INFO] [stdout] 31 |     op.build();
[INFO] [stdout]    |     ^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]    |
[INFO] [stdout] 31 |     let _ = op.build();
[INFO] [stdout]    |     +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> src/linux.rs:34:5
[INFO] [stdout]    |
[INFO] [stdout] 34 |     op.post_build();
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]    |
[INFO] [stdout] 34 |     let _ = op.post_build();
[INFO] [stdout]    |     +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `FromArgMatches`
[INFO] [stdout]  --> src/main.rs:2:36
[INFO] [stdout]   |
[INFO] [stdout] 2 | use clap::{Parser, CommandFactory, FromArgMatches};
[INFO] [stdout]   |                                    ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `output`
[INFO] [stdout]    --> src/linux.rs:121:17
[INFO] [stdout]     |
[INFO] [stdout] 121 |             let output = Command::new("bash")
[INFO] [stdout]     |                 ^^^^^^ help: if this is intentional, prefix it with an underscore: `_output`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `output`
[INFO] [stdout]    --> src/linux.rs:132:17
[INFO] [stdout]     |
[INFO] [stdout] 132 |             let output = Command::new("bash")
[INFO] [stdout]     |                 ^^^^^^ help: if this is intentional, prefix it with an underscore: `_output`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `output`
[INFO] [stdout]    --> src/windows.rs:196:13
[INFO] [stdout]     |
[INFO] [stdout] 196 |         let output = Command::new("bash")
[INFO] [stdout]     |             ^^^^^^ help: if this is intentional, prefix it with an underscore: `_output`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `cmd`
[INFO] [stdout]    --> src/main.rs:269:13
[INFO] [stdout]     |
[INFO] [stdout] 269 |         let cmd = Subcommand::new(args.common.subcommand_args)?;
[INFO] [stdout]     |             ^^^ help: if this is intentional, prefix it with an underscore: `_cmd`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `release` and `target` are never read
[INFO] [stdout]  --> src/android.rs:3:5
[INFO] [stdout]   |
[INFO] [stdout] 2 | pub struct AndroidBuilder {
[INFO] [stdout]   |            -------------- fields in this struct
[INFO] [stdout] 3 |     release: bool,
[INFO] [stdout]   |     ^^^^^^^
[INFO] [stdout] 4 |     target: String,
[INFO] [stdout]   |     ^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `AndroidRunner` is never constructed
[INFO] [stdout]   --> src/android.rs:22:8
[INFO] [stdout]    |
[INFO] [stdout] 22 | struct AndroidRunner{
[INFO] [stdout]    |        ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function `new` is never used
[INFO] [stdout]   --> src/android.rs:27:8
[INFO] [stdout]    |
[INFO] [stdout] 26 | impl AndroidRunner{
[INFO] [stdout]    | ------------------ associated function in this implementation
[INFO] [stdout] 27 |     fn new() -> Self{
[INFO] [stdout]    |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `release` and `target` are never read
[INFO] [stdout]   --> src/ios.rs:18:5
[INFO] [stdout]    |
[INFO] [stdout] 17 | pub struct IOSBuilder {
[INFO] [stdout]    |            ---------- fields in this struct
[INFO] [stdout] 18 |     release: bool,
[INFO] [stdout]    |     ^^^^^^^
[INFO] [stdout] 19 |     target: String,
[INFO] [stdout]    |     ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `IOSRunner` is never constructed
[INFO] [stdout]   --> src/ios.rs:44:8
[INFO] [stdout]    |
[INFO] [stdout] 44 | struct IOSRunner{
[INFO] [stdout]    |        ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function `new` is never used
[INFO] [stdout]   --> src/ios.rs:49:8
[INFO] [stdout]    |
[INFO] [stdout] 48 | impl IOSRunner {
[INFO] [stdout]    | -------------- associated function in this implementation
[INFO] [stdout] 49 |     fn new() -> Self{
[INFO] [stdout]    |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `icon_path` and `app_name` are never read
[INFO] [stdout]   --> src/linux.rs:15:5
[INFO] [stdout]    |
[INFO] [stdout] 10 | pub struct LinuxBuilder {
[INFO] [stdout]    |            ------------ fields in this struct
[INFO] [stdout] ...
[INFO] [stdout] 15 |     icon_path: Option<String>,
[INFO] [stdout]    |     ^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 19 |     app_name: Option<String>,
[INFO] [stdout]    |     ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `LinuxRunner` is never constructed
[INFO] [stdout]    --> src/linux.rs:149:8
[INFO] [stdout]     |
[INFO] [stdout] 149 | struct LinuxRunner{
[INFO] [stdout]     |        ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function `new` is never used
[INFO] [stdout]    --> src/linux.rs:154:8
[INFO] [stdout]     |
[INFO] [stdout] 153 | impl LinuxRunner{
[INFO] [stdout]     | ---------------- associated function in this implementation
[INFO] [stdout] 154 |     fn new() -> Self {
[INFO] [stdout]     |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `release` and `target` are never read
[INFO] [stdout]  --> src/macos.rs:3:5
[INFO] [stdout]   |
[INFO] [stdout] 2 | pub struct MacOSBuilder {
[INFO] [stdout]   |            ------------ fields in this struct
[INFO] [stdout] 3 |     release: bool,
[INFO] [stdout]   |     ^^^^^^^
[INFO] [stdout] 4 |     target: String,
[INFO] [stdout]   |     ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `MacOSRunner` is never constructed
[INFO] [stdout]   --> src/macos.rs:22:8
[INFO] [stdout]    |
[INFO] [stdout] 22 | struct MacOSRunner{
[INFO] [stdout]    |        ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function `new` is never used
[INFO] [stdout]   --> src/macos.rs:27:8
[INFO] [stdout]    |
[INFO] [stdout] 26 | impl MacOSRunner {
[INFO] [stdout]    | ---------------- associated function in this implementation
[INFO] [stdout] 27 |     fn new() -> Self {
[INFO] [stdout]    |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> src/linux.rs:28:5
[INFO] [stdout]    |
[INFO] [stdout] 28 |     op.pre_build();
[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)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]    |
[INFO] [stdout] 28 |     let _ = op.pre_build();
[INFO] [stdout]    |     +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> src/linux.rs:31:5
[INFO] [stdout]    |
[INFO] [stdout] 31 |     op.build();
[INFO] [stdout]    |     ^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]    |
[INFO] [stdout] 31 |     let _ = op.build();
[INFO] [stdout]    |     +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> src/linux.rs:34:5
[INFO] [stdout]    |
[INFO] [stdout] 34 |     op.post_build();
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]    |
[INFO] [stdout] 34 |     let _ = op.post_build();
[INFO] [stdout]    |     +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 44.46s
[INFO] running `Command { std: "docker" "inspect" "21f2396c5edeec858aaa8e71813e532725d56d724276095c2cbc6b6ac95a2eee", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "21f2396c5edeec858aaa8e71813e532725d56d724276095c2cbc6b6ac95a2eee", kill_on_drop: false }`
[INFO] [stdout] 21f2396c5edeec858aaa8e71813e532725d56d724276095c2cbc6b6ac95a2eee
