[INFO] cloning repository https://github.com/thomas192/rusty_container
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/thomas192/rusty_container" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fthomas192%2Frusty_container", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fthomas192%2Frusty_container'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 791fdd0a918fd4334008afe68af656295e2242ad
[INFO] checking thomas192/rusty_container against master#4b596bbd847672da87763b76171687d3544863c2 for pr-144544
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fthomas192%2Frusty_container" "/workspace/builds/worker-4-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-4-tc1/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/thomas192/rusty_container
[INFO] finished tweaking git repo https://github.com/thomas192/rusty_container
[INFO] tweaked toml for git repo https://github.com/thomas192/rusty_container written to /workspace/builds/worker-4-tc1/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/thomas192/rusty_container on toolchain 4b596bbd847672da87763b76171687d3544863c2
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+4b596bbd847672da87763b76171687d3544863c2" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/thomas192/rusty_container 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" "+4b596bbd847672da87763b76171687d3544863c2" "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:cf8efcab8866f2cf4285301c7418e2f4f2a9b088c91ba69c40d5b659f81557f7" "/opt/rustwide/cargo-home/bin/cargo" "+4b596bbd847672da87763b76171687d3544863c2" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 96cf005e85385eca5c43b40182e0e3723c801c93894b96b50c9ec160fbc20435
[INFO] running `Command { std: "docker" "start" "-a" "96cf005e85385eca5c43b40182e0e3723c801c93894b96b50c9ec160fbc20435", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "96cf005e85385eca5c43b40182e0e3723c801c93894b96b50c9ec160fbc20435", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "96cf005e85385eca5c43b40182e0e3723c801c93894b96b50c9ec160fbc20435", kill_on_drop: false }`
[INFO] [stdout] 96cf005e85385eca5c43b40182e0e3723c801c93894b96b50c9ec160fbc20435
[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:cf8efcab8866f2cf4285301c7418e2f4f2a9b088c91ba69c40d5b659f81557f7" "/opt/rustwide/cargo-home/bin/cargo" "+4b596bbd847672da87763b76171687d3544863c2" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 9b12fd39672d085b1cce09f538b3593c04a28e7c0bb85aaacb336c92f6d0607b
[INFO] running `Command { std: "docker" "start" "-a" "9b12fd39672d085b1cce09f538b3593c04a28e7c0bb85aaacb336c92f6d0607b", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.153
[INFO] [stderr]     Checking bitflags v2.4.2
[INFO] [stderr]     Checking nix v0.27.1
[INFO] [stderr]     Checking rusty_container v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `File`
[INFO] [stdout]  --> src/cgroup.rs:1:21
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::fs::{self, File};
[INFO] [stdout]   |                     ^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `Write`
[INFO] [stdout]  --> src/cgroup.rs:2:21
[INFO] [stdout]   |
[INFO] [stdout] 2 | use std::io::{self, Write};
[INFO] [stdout]   |                     ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `File`
[INFO] [stdout]  --> src/cgroup.rs:1:21
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::fs::{self, File};
[INFO] [stdout]   |                     ^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `Write`
[INFO] [stdout]  --> src/cgroup.rs:2:21
[INFO] [stdout]   |
[INFO] [stdout] 2 | use std::io::{self, Write};
[INFO] [stdout]   |                     ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `num::NonZeroI128`
[INFO] [stdout]    --> src/cgroup.rs:168:19
[INFO] [stdout]     |
[INFO] [stdout] 168 |     use std::{fs, num::NonZeroI128};
[INFO] [stdout]     |                   ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Cgroup` is never constructed
[INFO] [stdout]   --> src/cgroup.rs:24:12
[INFO] [stdout]    |
[INFO] [stdout] 24 | pub struct Cgroup {
[INFO] [stdout]    |            ^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: type alias `Result` is never used
[INFO] [stdout]   --> src/cgroup.rs:33:10
[INFO] [stdout]    |
[INFO] [stdout] 33 | pub type Result<T> = std::result::Result<T, CgroupError>;
[INFO] [stdout]    |          ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: multiple associated items are never used
[INFO] [stdout]    --> src/cgroup.rs:61:12
[INFO] [stdout]     |
[INFO] [stdout] 35  | impl Cgroup {
[INFO] [stdout]     | ----------- associated items in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 61  |     pub fn build(
[INFO] [stdout]     |            ^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 120 |     pub fn build_default(name: &str) -> Result<Self> {
[INFO] [stdout]     |            ^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 125 |     pub fn create(&self) -> io::Result<()> {
[INFO] [stdout]     |            ^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 131 |     pub fn delete(&self) -> io::Result<()> {
[INFO] [stdout]     |            ^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 137 |     pub fn set_cpu_max(&self, quota: i64, period: u64) -> io::Result<()> {
[INFO] [stdout]     |            ^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 144 |     pub fn set_cpu_weight(&self, weight: u64) -> io::Result<()> {
[INFO] [stdout]     |            ^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 150 |     pub fn set_memory_max(&self, memory_max: u64) -> io::Result<()> {
[INFO] [stdout]     |            ^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 156 |     pub fn set_memory_swap_max(&self, memory_swap_max: u64) -> io::Result<()> {
[INFO] [stdout]     |            ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `CPUMax` is never constructed
[INFO] [stdout]  --> src/cgroup/cpu_max.rs:2:12
[INFO] [stdout]   |
[INFO] [stdout] 2 | pub struct CPUMax {
[INFO] [stdout]   |            ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated items `new`, `quota`, and `period` are never used
[INFO] [stdout]   --> src/cgroup/cpu_max.rs:8:12
[INFO] [stdout]    |
[INFO] [stdout] 7  | impl CPUMax {
[INFO] [stdout]    | ----------- associated items in this implementation
[INFO] [stdout] 8  |     pub fn new(quota: i64, period: u64) -> Self {
[INFO] [stdout]    |            ^^^
[INFO] [stdout] ...
[INFO] [stdout] 12 |     pub fn quota(&self) -> i64 {
[INFO] [stdout]    |            ^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 16 |     pub fn period(&self) -> u64 {
[INFO] [stdout]    |            ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum `CPUWeightError` is never used
[INFO] [stdout]  --> src/cgroup/cpu_weight.rs:5:10
[INFO] [stdout]   |
[INFO] [stdout] 5 | pub enum CPUWeightError {
[INFO] [stdout]   |          ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `CPUWeight` is never constructed
[INFO] [stdout]   --> src/cgroup/cpu_weight.rs:20:12
[INFO] [stdout]    |
[INFO] [stdout] 20 | pub struct CPUWeight(u64);
[INFO] [stdout]    |            ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: type alias `Result` is never used
[INFO] [stdout]   --> src/cgroup/cpu_weight.rs:22:10
[INFO] [stdout]    |
[INFO] [stdout] 22 | pub type Result<T> = std::result::Result<T, CPUWeightError>;
[INFO] [stdout]    |          ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated items `build` and `value` are never used
[INFO] [stdout]   --> src/cgroup/cpu_weight.rs:32:12
[INFO] [stdout]    |
[INFO] [stdout] 31 | impl CPUWeight {
[INFO] [stdout]    | -------------- associated items in this implementation
[INFO] [stdout] 32 |     pub fn build(weight: u64) -> Result<Self> {
[INFO] [stdout]    |            ^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 40 |     pub fn value(&self) -> u64 {
[INFO] [stdout]    |            ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `MemoryMax` is never constructed
[INFO] [stdout]  --> src/cgroup/memory_max.rs:2:12
[INFO] [stdout]   |
[INFO] [stdout] 2 | pub struct MemoryMax(Option<u64>);
[INFO] [stdout]   |            ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated items `new` and `value` are never used
[INFO] [stdout]  --> src/cgroup/memory_max.rs:5:12
[INFO] [stdout]   |
[INFO] [stdout] 4 | impl MemoryMax {
[INFO] [stdout]   | -------------- associated items in this implementation
[INFO] [stdout] 5 |     pub fn new(max: Option<u64>) -> Self {
[INFO] [stdout]   |            ^^^
[INFO] [stdout] ...
[INFO] [stdout] 9 |     pub fn value(&self) -> Option<u64> {
[INFO] [stdout]   |            ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `MemorySwapMax` is never constructed
[INFO] [stdout]  --> src/cgroup/memory_swap_max.rs:2:12
[INFO] [stdout]   |
[INFO] [stdout] 2 | pub struct MemorySwapMax(Option<u64>);
[INFO] [stdout]   |            ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated items `new` and `value` are never used
[INFO] [stdout]  --> src/cgroup/memory_swap_max.rs:5:12
[INFO] [stdout]   |
[INFO] [stdout] 4 | impl MemorySwapMax {
[INFO] [stdout]   | ------------------ associated items in this implementation
[INFO] [stdout] 5 |     pub fn new(max: Option<u64>) -> Self {
[INFO] [stdout]   |            ^^^
[INFO] [stdout] ...
[INFO] [stdout] 9 |     pub fn value(&self) -> Option<u64> {
[INFO] [stdout]   |            ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum `CgroupError` is never used
[INFO] [stdout]  --> src/cgroup/cgroup_error.rs:8:10
[INFO] [stdout]   |
[INFO] [stdout] 8 | pub enum CgroupError {
[INFO] [stdout]   |          ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum `IOMaxError` is never used
[INFO] [stdout]  --> src/cgroup/io_max.rs:7:10
[INFO] [stdout]   |
[INFO] [stdout] 7 | pub enum IOMaxError {
[INFO] [stdout]   |          ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `IOMax` is never constructed
[INFO] [stdout]   --> src/cgroup/io_max.rs:28:12
[INFO] [stdout]    |
[INFO] [stdout] 28 | pub struct IOMax {
[INFO] [stdout]    |            ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: type alias `Result` is never used
[INFO] [stdout]   --> src/cgroup/io_max.rs:35:10
[INFO] [stdout]    |
[INFO] [stdout] 35 | pub type Result<T> = std::result::Result<T, IOMaxError>;
[INFO] [stdout]    |          ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: multiple associated items are never used
[INFO] [stdout]    --> src/cgroup/io_max.rs:38:12
[INFO] [stdout]     |
[INFO] [stdout] 37  | impl IOMax {
[INFO] [stdout]     | ---------- associated items in this implementation
[INFO] [stdout] 38  |     pub fn build(
[INFO] [stdout]     |            ^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 70  |     fn device_path_to_major_minor(device_path: &str) -> Result<String> {
[INFO] [stdout]     |        ^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 86  |     fn validate_and_transform(s: &str) -> Result<String> {
[INFO] [stdout]     |        ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 99  |     pub fn device_read_bps(&self) -> Option<&String> {
[INFO] [stdout]     |            ^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 103 |     pub fn device_write_bps(&self) -> Option<&String> {
[INFO] [stdout]     |            ^^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 107 |     pub fn device_read_iops(&self) -> Option<&String> {
[INFO] [stdout]     |            ^^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 111 |     pub fn device_write_iops(&self) -> Option<&String> {
[INFO] [stdout]     |            ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `cpu_max`, `cpu_weight`, `memory_max`, `memory_swap_max`, and `io_max` are never read
[INFO] [stdout]   --> src/cgroup.rs:26:5
[INFO] [stdout]    |
[INFO] [stdout] 24 | pub struct Cgroup {
[INFO] [stdout]    |            ------ fields in this struct
[INFO] [stdout] 25 |     path: PathBuf,
[INFO] [stdout] 26 |     cpu_max: CPUMax,
[INFO] [stdout]    |     ^^^^^^^
[INFO] [stdout] 27 |     cpu_weight: CPUWeight,
[INFO] [stdout]    |     ^^^^^^^^^^
[INFO] [stdout] 28 |     memory_max: MemoryMax,
[INFO] [stdout]    |     ^^^^^^^^^^
[INFO] [stdout] 29 |     memory_swap_max: MemorySwapMax,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^
[INFO] [stdout] 30 |     io_max: IOMax,
[INFO] [stdout]    |     ^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Cgroup` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: methods `set_cpu_max`, `set_cpu_weight`, `set_memory_max`, and `set_memory_swap_max` are never used
[INFO] [stdout]    --> src/cgroup.rs:137:12
[INFO] [stdout]     |
[INFO] [stdout] 35  | impl Cgroup {
[INFO] [stdout]     | ----------- methods in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 137 |     pub fn set_cpu_max(&self, quota: i64, period: u64) -> io::Result<()> {
[INFO] [stdout]     |            ^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 144 |     pub fn set_cpu_weight(&self, weight: u64) -> io::Result<()> {
[INFO] [stdout]     |            ^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 150 |     pub fn set_memory_max(&self, memory_max: u64) -> io::Result<()> {
[INFO] [stdout]     |            ^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 156 |     pub fn set_memory_swap_max(&self, memory_swap_max: u64) -> io::Result<()> {
[INFO] [stdout]     |            ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `quota` and `period` are never read
[INFO] [stdout]  --> src/cgroup/cpu_max.rs:3:5
[INFO] [stdout]   |
[INFO] [stdout] 2 | pub struct CPUMax {
[INFO] [stdout]   |            ------ fields in this struct
[INFO] [stdout] 3 |     quota: i64,
[INFO] [stdout]   |     ^^^^^
[INFO] [stdout] 4 |     period: u64,
[INFO] [stdout]   |     ^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `CPUMax` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: methods `quota` and `period` are never used
[INFO] [stdout]   --> src/cgroup/cpu_max.rs:12:12
[INFO] [stdout]    |
[INFO] [stdout] 7  | impl CPUMax {
[INFO] [stdout]    | ----------- methods in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 12 |     pub fn quota(&self) -> i64 {
[INFO] [stdout]    |            ^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 16 |     pub fn period(&self) -> u64 {
[INFO] [stdout]    |            ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `0` is never read
[INFO] [stdout]  --> src/cgroup/memory_max.rs:2:22
[INFO] [stdout]   |
[INFO] [stdout] 2 | pub struct MemoryMax(Option<u64>);
[INFO] [stdout]   |            --------- ^^^^^^^^^^^
[INFO] [stdout]   |            |
[INFO] [stdout]   |            field in this struct
[INFO] [stdout]   |
[INFO] [stdout]   = help: consider removing this field
[INFO] [stdout]   = note: `MemoryMax` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `value` is never used
[INFO] [stdout]  --> src/cgroup/memory_max.rs:9:12
[INFO] [stdout]   |
[INFO] [stdout] 4 | impl MemoryMax {
[INFO] [stdout]   | -------------- method in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 9 |     pub fn value(&self) -> Option<u64> {
[INFO] [stdout]   |            ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `0` is never read
[INFO] [stdout]  --> src/cgroup/memory_swap_max.rs:2:26
[INFO] [stdout]   |
[INFO] [stdout] 2 | pub struct MemorySwapMax(Option<u64>);
[INFO] [stdout]   |            ------------- ^^^^^^^^^^^
[INFO] [stdout]   |            |
[INFO] [stdout]   |            field in this struct
[INFO] [stdout]   |
[INFO] [stdout]   = help: consider removing this field
[INFO] [stdout]   = note: `MemorySwapMax` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `value` is never used
[INFO] [stdout]  --> src/cgroup/memory_swap_max.rs:9:12
[INFO] [stdout]   |
[INFO] [stdout] 4 | impl MemorySwapMax {
[INFO] [stdout]   | ------------------ method in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 9 |     pub fn value(&self) -> Option<u64> {
[INFO] [stdout]   |            ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `device_read_bps`, `device_write_bps`, `device_read_iops`, and `device_write_iops` are never read
[INFO] [stdout]   --> src/cgroup/io_max.rs:29:9
[INFO] [stdout]    |
[INFO] [stdout] 28 | pub struct IOMax {
[INFO] [stdout]    |            ----- fields in this struct
[INFO] [stdout] 29 |     pub device_read_bps: Option<String>,
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^
[INFO] [stdout] 30 |     pub device_write_bps: Option<String>,
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^
[INFO] [stdout] 31 |     pub device_read_iops: Option<String>,
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^
[INFO] [stdout] 32 |     pub device_write_iops: Option<String>,
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `IOMax` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: methods `device_read_bps`, `device_write_bps`, `device_read_iops`, and `device_write_iops` are never used
[INFO] [stdout]    --> src/cgroup/io_max.rs:99:12
[INFO] [stdout]     |
[INFO] [stdout] 37  | impl IOMax {
[INFO] [stdout]     | ---------- methods in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 99  |     pub fn device_read_bps(&self) -> Option<&String> {
[INFO] [stdout]     |            ^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 103 |     pub fn device_write_bps(&self) -> Option<&String> {
[INFO] [stdout]     |            ^^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 107 |     pub fn device_read_iops(&self) -> Option<&String> {
[INFO] [stdout]     |            ^^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 111 |     pub fn device_write_iops(&self) -> Option<&String> {
[INFO] [stdout]     |            ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 1.35s
[INFO] running `Command { std: "docker" "inspect" "9b12fd39672d085b1cce09f538b3593c04a28e7c0bb85aaacb336c92f6d0607b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "9b12fd39672d085b1cce09f538b3593c04a28e7c0bb85aaacb336c92f6d0607b", kill_on_drop: false }`
[INFO] [stdout] 9b12fd39672d085b1cce09f538b3593c04a28e7c0bb85aaacb336c92f6d0607b