[INFO] cloning repository https://github.com/Joshua-Wright/hardlink-deduplicator
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/Joshua-Wright/hardlink-deduplicator" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FJoshua-Wright%2Fhardlink-deduplicator", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FJoshua-Wright%2Fhardlink-deduplicator'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] da207b3f7c6dc3b027f1aee3b022db061bd8454a
[INFO] checking Joshua-Wright/hardlink-deduplicator against try#012cd62c9add58ab3910e44c137d87db3ab70f61 for pr-155915
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FJoshua-Wright%2Fhardlink-deduplicator" "/workspace/builds/worker-0-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-0-tc2/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/Joshua-Wright/hardlink-deduplicator
[INFO] finished tweaking git repo https://github.com/Joshua-Wright/hardlink-deduplicator
[INFO] tweaked toml for git repo https://github.com/Joshua-Wright/hardlink-deduplicator written to /workspace/builds/worker-0-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/Joshua-Wright/hardlink-deduplicator on toolchain 012cd62c9add58ab3910e44c137d87db3ab70f61
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+012cd62c9add58ab3910e44c137d87db3ab70f61" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/Joshua-Wright/hardlink-deduplicator 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" "+012cd62c9add58ab3910e44c137d87db3ab70f61" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc2/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+012cd62c9add58ab3910e44c137d87db3ab70f61" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 6d4c69bc7f77ec6c0f0fa8fcac7fe075ac2050f21d6c0b2916fb04ed13cf371c
[INFO] running `Command { std: "docker" "start" "-a" "6d4c69bc7f77ec6c0f0fa8fcac7fe075ac2050f21d6c0b2916fb04ed13cf371c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "6d4c69bc7f77ec6c0f0fa8fcac7fe075ac2050f21d6c0b2916fb04ed13cf371c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "6d4c69bc7f77ec6c0f0fa8fcac7fe075ac2050f21d6c0b2916fb04ed13cf371c", kill_on_drop: false }`
[INFO] [stdout] 6d4c69bc7f77ec6c0f0fa8fcac7fe075ac2050f21d6c0b2916fb04ed13cf371c
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc2/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-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" "+012cd62c9add58ab3910e44c137d87db3ab70f61" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 67c0706f46d0264a3ca8283b83b49a2f8c7bac3925921538ec2785b97c1f65d3
[INFO] running `Command { std: "docker" "start" "-a" "67c0706f46d0264a3ca8283b83b49a2f8c7bac3925921538ec2785b97c1f65d3", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.18
[INFO] [stderr]    Compiling unicode-xid v0.2.1
[INFO] [stderr]    Compiling autocfg v1.0.0
[INFO] [stderr]    Compiling syn v1.0.33
[INFO] [stderr]    Compiling memchr v2.3.3
[INFO] [stderr]    Compiling version_check v0.9.2
[INFO] [stderr]    Compiling libc v0.2.72
[INFO] [stderr]    Compiling serde_derive v1.0.114
[INFO] [stderr]    Compiling byteorder v1.3.4
[INFO] [stderr]    Compiling serde v1.0.114
[INFO] [stderr]    Compiling gcc v0.3.55
[INFO] [stderr]     Checking predicates-core v1.0.0
[INFO] [stderr]    Compiling ryu v1.0.5
[INFO] [stderr]    Compiling unicode-segmentation v1.6.0
[INFO] [stderr]     Checking thread_local v1.0.1
[INFO] [stderr]     Checking regex-syntax v0.6.18
[INFO] [stderr]    Compiling cfg-if v0.1.10
[INFO] [stderr]     Checking difference v2.0.0
[INFO] [stderr]     Checking treeline v0.1.0
[INFO] [stderr]     Checking gimli v0.22.0
[INFO] [stderr]     Checking unicode-width v0.1.8
[INFO] [stderr]    Compiling proc-macro-error-attr v0.4.12
[INFO] [stderr]    Compiling proc-macro-error v0.4.12
[INFO] [stderr]     Checking adler v0.2.3
[INFO] [stderr]    Compiling heck v0.3.1
[INFO] [stderr]     Checking textwrap v0.11.0
[INFO] [stderr]     Checking predicates-tree v1.0.0
[INFO] [stderr]     Checking itoa v0.4.6
[INFO] [stderr]     Checking object v0.20.0
[INFO] [stderr]     Checking aho-corasick v0.7.13
[INFO] [stderr]     Checking csv-core v0.1.10
[INFO] [stderr]     Checking miniz_oxide v0.4.0
[INFO] [stderr]     Checking os_str_bytes v2.3.1
[INFO] [stderr]     Checking humantime v2.0.1
[INFO] [stderr]    Compiling num-traits v0.2.12
[INFO] [stderr]    Compiling hashbrown v0.8.1
[INFO] [stderr]    Compiling indexmap v1.5.0
[INFO] [stderr]     Checking downcast v0.10.0
[INFO] [stderr]     Checking termcolor v1.1.0
[INFO] [stderr]     Checking regex-automata v0.1.9
[INFO] [stderr]     Checking fragile v1.0.0
[INFO] [stderr]     Checking rustc-demangle v0.1.16
[INFO] [stderr]     Checking seahash v3.0.7
[INFO] [stderr]     Checking walkdir v2.3.1
[INFO] [stderr]    Compiling fasthash-sys v0.3.2 (https://github.com/Joshua-Wright/rust-fasthash/?rev=bd0ef9b9391ca80d1a115c3207e1f8417bb4c6b9#bd0ef9b9)
[INFO] [stderr]    Compiling quote v1.0.7
[INFO] [stderr]     Checking rand v0.4.6
[INFO] [stderr]     Checking atty v0.2.14
[INFO] [stderr]     Checking xoroshiro128 v0.3.0
[INFO] [stderr]     Checking float-cmp v0.6.0
[INFO] [stderr]     Checking regex v1.3.9
[INFO] [stderr]     Checking addr2line v0.13.0
[INFO] [stderr]     Checking predicates v1.0.4
[INFO] [stderr]     Checking backtrace v0.3.50
[INFO] [stderr]    Compiling syn-mid v0.5.0
[INFO] [stderr]    Compiling mockall_derive v0.7.1
[INFO] [stderr]    Compiling clap_derive v3.0.0-beta.1
[INFO] [stderr]     Checking fasthash v0.4.0 (https://github.com/Joshua-Wright/rust-fasthash/?rev=bd0ef9b9391ca80d1a115c3207e1f8417bb4c6b9#bd0ef9b9)
[INFO] [stderr]     Checking clap v3.0.0-beta.1
[INFO] [stderr]     Checking mockall v0.7.1
[INFO] [stderr]     Checking bstr v0.2.13
[INFO] [stderr]     Checking humantime-serde v1.0.0
[INFO] [stderr]     Checking csv v1.1.3
[INFO] [stderr]     Checking hardlink-deduplicator v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: found module declaration for lib.rs
[INFO] [stdout]   --> src/main.rs:12:1
[INFO] [stdout]    |
[INFO] [stdout] 12 | mod lib;
[INFO] [stdout]    | ^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: lib.rs is the root of this crate's library target
[INFO] [stdout]    = help: to refer to it from other targets, use the library's name as the path
[INFO] [stdout]    = note: `#[warn(special_module_name)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::io`
[INFO] [stdout]  --> src/lib/fs.rs:1:9
[INFO] [stdout]   |
[INFO] [stdout] 1 | pub use std::io;
[INFO] [stdout]   |         ^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: found module declaration for lib.rs
[INFO] [stdout]   --> src/main.rs:12:1
[INFO] [stdout]    |
[INFO] [stdout] 12 | mod lib;
[INFO] [stdout]    | ^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: lib.rs is the root of this crate's library target
[INFO] [stdout]    = help: to refer to it from other targets, use the library's name as the path
[INFO] [stdout]    = note: `#[warn(special_module_name)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::io`
[INFO] [stdout]  --> src/lib/fs.rs:1:9
[INFO] [stdout]   |
[INFO] [stdout] 1 | pub use std::io;
[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 variable: `accessed`
[INFO] [stdout]   --> src/lib/file_entry.rs:32:30
[INFO] [stdout]    |
[INFO] [stdout] 32 |         let (size, modified, accessed, created, inode) = fs.metadata(&absolute_path)?;
[INFO] [stdout]    |                              ^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_accessed`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `verbose` and `quiet` are never read
[INFO] [stdout]   --> src/main.rs:26:5
[INFO] [stdout]    |
[INFO] [stdout] 21 | struct Opts {
[INFO] [stdout]    |        ---- fields in this struct
[INFO] [stdout] ...
[INFO] [stdout] 26 |     verbose: bool,
[INFO] [stdout]    |     ^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 29 |     quiet: bool,
[INFO] [stdout]    |     ^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Opts` 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: fields `0` and `1` are never read
[INFO] [stdout]   --> src/lib/mod.rs:16:13
[INFO] [stdout]    |
[INFO] [stdout] 16 |     Generic(Backtrace, String),
[INFO] [stdout]    |     ------- ^^^^^^^^^  ^^^^^^
[INFO] [stdout]    |     |
[INFO] [stdout]    |     fields in this variant
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Error` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] help: consider changing the fields to be of unit type to suppress this warning while preserving the field numbering, or remove the fields
[INFO] [stdout]    |
[INFO] [stdout] 16 -     Generic(Backtrace, String),
[INFO] [stdout] 16 +     Generic((), ()),
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `0` and `1` are never read
[INFO] [stdout]   --> src/lib/mod.rs:17:8
[INFO] [stdout]    |
[INFO] [stdout] 17 |     IO(Backtrace, std::io::Error),
[INFO] [stdout]    |     -- ^^^^^^^^^  ^^^^^^^^^^^^^^
[INFO] [stdout]    |     |
[INFO] [stdout]    |     fields in this variant
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Error` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] help: consider changing the fields to be of unit type to suppress this warning while preserving the field numbering, or remove the fields
[INFO] [stdout]    |
[INFO] [stdout] 17 -     IO(Backtrace, std::io::Error),
[INFO] [stdout] 17 +     IO((), ()),
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `0` is never read
[INFO] [stdout]   --> src/lib/mod.rs:18:22
[INFO] [stdout]    |
[INFO] [stdout] 18 |     StripPrefixError(Backtrace, std::path::StripPrefixError),
[INFO] [stdout]    |     ---------------- ^^^^^^^^^
[INFO] [stdout]    |     |
[INFO] [stdout]    |     field in this variant
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Error` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] help: consider changing the field to be of unit type to suppress this warning while preserving the field numbering, or remove the field
[INFO] [stdout]    |
[INFO] [stdout] 18 -     StripPrefixError(Backtrace, std::path::StripPrefixError),
[INFO] [stdout] 18 +     StripPrefixError((), std::path::StripPrefixError),
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `0` and `1` are never read
[INFO] [stdout]   --> src/lib/mod.rs:20:9
[INFO] [stdout]    |
[INFO] [stdout] 20 |     Csv(Backtrace, csv::Error),
[INFO] [stdout]    |     --- ^^^^^^^^^  ^^^^^^^^^^
[INFO] [stdout]    |     |
[INFO] [stdout]    |     fields in this variant
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Error` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] help: consider changing the fields to be of unit type to suppress this warning while preserving the field numbering, or remove the fields
[INFO] [stdout]    |
[INFO] [stdout] 20 -     Csv(Backtrace, csv::Error),
[INFO] [stdout] 20 +     Csv((), ()),
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `hash_to_hex_str` is never used
[INFO] [stdout]   --> src/lib/fast_hash.rs:21:8
[INFO] [stdout]    |
[INFO] [stdout] 21 | pub fn hash_to_hex_str(hash: u128) -> String {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: methods `reload_from_disk` and `relative_folder` are never used
[INFO] [stdout]   --> src/lib/file_entry.rs:44:12
[INFO] [stdout]    |
[INFO] [stdout] 24 | impl FileEntry {
[INFO] [stdout]    | -------------- methods in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 44 |     pub fn reload_from_disk<F: fs::AbstractFs, P1: AsRef<Path>>(&self, fs: &F, base_path: P1) -> Result<Self> {
[INFO] [stdout]    |            ^^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 61 |     pub fn relative_folder(&self) -> &Path {
[INFO] [stdout]    |            ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `accessed`
[INFO] [stdout]   --> src/lib/file_entry.rs:32:30
[INFO] [stdout]    |
[INFO] [stdout] 32 |         let (size, modified, accessed, created, inode) = fs.metadata(&absolute_path)?;
[INFO] [stdout]    |                              ^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_accessed`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `verbose` and `quiet` are never read
[INFO] [stdout]   --> src/main.rs:26:5
[INFO] [stdout]    |
[INFO] [stdout] 21 | struct Opts {
[INFO] [stdout]    |        ---- fields in this struct
[INFO] [stdout] ...
[INFO] [stdout] 26 |     verbose: bool,
[INFO] [stdout]    |     ^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 29 |     quiet: bool,
[INFO] [stdout]    |     ^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Opts` 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: fields `0` and `1` are never read
[INFO] [stdout]   --> src/lib/mod.rs:16:13
[INFO] [stdout]    |
[INFO] [stdout] 16 |     Generic(Backtrace, String),
[INFO] [stdout]    |     ------- ^^^^^^^^^  ^^^^^^
[INFO] [stdout]    |     |
[INFO] [stdout]    |     fields in this variant
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Error` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] help: consider changing the fields to be of unit type to suppress this warning while preserving the field numbering, or remove the fields
[INFO] [stdout]    |
[INFO] [stdout] 16 -     Generic(Backtrace, String),
[INFO] [stdout] 16 +     Generic((), ()),
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `0` and `1` are never read
[INFO] [stdout]   --> src/lib/mod.rs:17:8
[INFO] [stdout]    |
[INFO] [stdout] 17 |     IO(Backtrace, std::io::Error),
[INFO] [stdout]    |     -- ^^^^^^^^^  ^^^^^^^^^^^^^^
[INFO] [stdout]    |     |
[INFO] [stdout]    |     fields in this variant
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Error` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] help: consider changing the fields to be of unit type to suppress this warning while preserving the field numbering, or remove the fields
[INFO] [stdout]    |
[INFO] [stdout] 17 -     IO(Backtrace, std::io::Error),
[INFO] [stdout] 17 +     IO((), ()),
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `0` is never read
[INFO] [stdout]   --> src/lib/mod.rs:18:22
[INFO] [stdout]    |
[INFO] [stdout] 18 |     StripPrefixError(Backtrace, std::path::StripPrefixError),
[INFO] [stdout]    |     ---------------- ^^^^^^^^^
[INFO] [stdout]    |     |
[INFO] [stdout]    |     field in this variant
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Error` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] help: consider changing the field to be of unit type to suppress this warning while preserving the field numbering, or remove the field
[INFO] [stdout]    |
[INFO] [stdout] 18 -     StripPrefixError(Backtrace, std::path::StripPrefixError),
[INFO] [stdout] 18 +     StripPrefixError((), std::path::StripPrefixError),
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `0` and `1` are never read
[INFO] [stdout]   --> src/lib/mod.rs:20:9
[INFO] [stdout]    |
[INFO] [stdout] 20 |     Csv(Backtrace, csv::Error),
[INFO] [stdout]    |     --- ^^^^^^^^^  ^^^^^^^^^^
[INFO] [stdout]    |     |
[INFO] [stdout]    |     fields in this variant
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Error` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] help: consider changing the fields to be of unit type to suppress this warning while preserving the field numbering, or remove the fields
[INFO] [stdout]    |
[INFO] [stdout] 20 -     Csv(Backtrace, csv::Error),
[INFO] [stdout] 20 +     Csv((), ()),
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `count` is never read
[INFO] [stdout]    --> src/lib/fs.rs:126:5
[INFO] [stdout]     |
[INFO] [stdout] 121 | pub struct TestFs {
[INFO] [stdout]     |            ------ field in this struct
[INFO] [stdout] ...
[INFO] [stdout] 126 |     count: UnsafeCell<i64>,
[INFO] [stdout]     |     ^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `TestFs` 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 `reload_from_disk` is never used
[INFO] [stdout]   --> src/lib/file_entry.rs:44:12
[INFO] [stdout]    |
[INFO] [stdout] 24 | impl FileEntry {
[INFO] [stdout]    | -------------- method in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 44 |     pub fn reload_from_disk<F: fs::AbstractFs, P1: AsRef<Path>>(&self, fs: &F, base_path: P1) -> Result<Self> {
[INFO] [stdout]    |            ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: using `.deref()` on a double reference, which returns `&str` instead of dereferencing the inner type
[INFO] [stdout]    --> src/lib/fs.rs:141:33
[INFO] [stdout]     |
[INFO] [stdout] 141 |                 .map(|(a, b)| (a.deref().to_owned(), b.to_owned().as_bytes().to_vec()))
[INFO] [stdout]     |                                 ^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(suspicious_double_ref_op)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: using `.deref()` on a double reference, which returns `&str` instead of dereferencing the inner type
[INFO] [stdout]    --> src/lib/fs.rs:146:38
[INFO] [stdout]     |
[INFO] [stdout] 146 |                 .map(|(i, (a, _))| (a.deref().to_owned(), (i + 1) as u64))
[INFO] [stdout]     |                                      ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 20.00s
[INFO] running `Command { std: "docker" "inspect" "67c0706f46d0264a3ca8283b83b49a2f8c7bac3925921538ec2785b97c1f65d3", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "67c0706f46d0264a3ca8283b83b49a2f8c7bac3925921538ec2785b97c1f65d3", kill_on_drop: false }`
[INFO] [stdout] 67c0706f46d0264a3ca8283b83b49a2f8c7bac3925921538ec2785b97c1f65d3
