[INFO] fetching crate picnic-rs 0.1.0...
[INFO] building picnic-rs-0.1.0 against try#d79d87d4c0f7f0d0785ad6e493cf8cf718ed89a6 for pr-146237-1
[INFO] extracting crate picnic-rs 0.1.0 into /workspace/builds/worker-6-tc2/source
[INFO] started tweaking crates.io crate picnic-rs 0.1.0
[INFO] finished tweaking crates.io crate picnic-rs 0.1.0
[INFO] tweaked toml for crates.io crate picnic-rs 0.1.0 written to /workspace/builds/worker-6-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate picnic-rs 0.1.0 on toolchain d79d87d4c0f7f0d0785ad6e493cf8cf718ed89a6
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+d79d87d4c0f7f0d0785ad6e493cf8cf718ed89a6" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate crates.io crate picnic-rs 0.1.0 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" "+d79d87d4c0f7f0d0785ad6e493cf8cf718ed89a6" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+d79d87d4c0f7f0d0785ad6e493cf8cf718ed89a6" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] f365b7bb04881b6fae633819f85bc61d146ff35de36db2ccfdf48d026957cb03
[INFO] running `Command { std: "docker" "start" "-a" "f365b7bb04881b6fae633819f85bc61d146ff35de36db2ccfdf48d026957cb03", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "f365b7bb04881b6fae633819f85bc61d146ff35de36db2ccfdf48d026957cb03", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f365b7bb04881b6fae633819f85bc61d146ff35de36db2ccfdf48d026957cb03", kill_on_drop: false }`
[INFO] [stdout] f365b7bb04881b6fae633819f85bc61d146ff35de36db2ccfdf48d026957cb03
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+d79d87d4c0f7f0d0785ad6e493cf8cf718ed89a6" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 8eac7b7016e6fc83477293f408a8e3be4780f587bb6f765ef5897778280ea070
[INFO] running `Command { std: "docker" "start" "-a" "8eac7b7016e6fc83477293f408a8e3be4780f587bb6f765ef5897778280ea070", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.147
[INFO] [stderr]    Compiling io-lifetimes v1.0.11
[INFO] [stderr]    Compiling proc-macro2 v1.0.63
[INFO] [stderr]    Compiling rustix v0.37.20
[INFO] [stderr]    Compiling memchr v2.5.0
[INFO] [stderr]    Compiling linux-raw-sys v0.3.8
[INFO] [stderr]    Compiling unicode-ident v1.0.9
[INFO] [stderr]    Compiling quote v1.0.28
[INFO] [stderr]    Compiling utf8parse v0.2.1
[INFO] [stderr]    Compiling serde v1.0.164
[INFO] [stderr]    Compiling anstyle-parse v0.2.1
[INFO] [stderr]    Compiling anstyle v1.0.1
[INFO] [stderr]    Compiling anstyle-query v1.0.0
[INFO] [stderr]    Compiling colorchoice v1.0.0
[INFO] [stderr]    Compiling clap_lex v0.5.0
[INFO] [stderr]    Compiling serde_json v1.0.99
[INFO] [stderr]    Compiling heck v0.4.1
[INFO] [stderr]    Compiling hashbrown v0.14.0
[INFO] [stderr]    Compiling regex-syntax v0.7.3
[INFO] [stderr]    Compiling aho-corasick v1.0.2
[INFO] [stderr]    Compiling itoa v1.0.6
[INFO] [stderr]    Compiling ryu v1.0.13
[INFO] [stderr]    Compiling indexmap v2.0.0
[INFO] [stderr]    Compiling unsafe-libyaml v0.2.8
[INFO] [stderr]    Compiling syn v2.0.22
[INFO] [stderr]    Compiling once_cell v1.18.0
[INFO] [stderr]    Compiling regex-automata v0.3.2
[INFO] [stderr]    Compiling serde_yaml v0.9.22
[INFO] [stderr]    Compiling is-terminal v0.4.7
[INFO] [stderr]    Compiling anstream v0.3.2
[INFO] [stderr]    Compiling clap_builder v4.3.8
[INFO] [stderr]    Compiling clap_derive v4.3.2
[INFO] [stderr]    Compiling regex v1.9.1
[INFO] [stderr]    Compiling clap v4.3.8
[INFO] [stderr]    Compiling picnic-rs v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: field `0` is never read
[INFO] [stdout]  --> src/error.rs:6:8
[INFO] [stdout]   |
[INFO] [stdout] 6 |     Io(io::Error),
[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]   = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[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] 6 -     Io(io::Error),
[INFO] [stdout] 6 +     Io(()),
[INFO] [stdout]   |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `0` is never read
[INFO] [stdout]  --> src/error.rs:7:10
[INFO] [stdout]   |
[INFO] [stdout] 7 |     Json(serde_json::Error),
[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] 7 -     Json(serde_json::Error),
[INFO] [stdout] 7 +     Json(()),
[INFO] [stdout]   |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `0` and `1` are never read
[INFO] [stdout]  --> src/error.rs:8:15
[INFO] [stdout]   |
[INFO] [stdout] 8 |     LineParse(String, usize),
[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] 8 -     LineParse(String, usize),
[INFO] [stdout] 8 +     LineParse((), ()),
[INFO] [stdout]   |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `0` is never read
[INFO] [stdout]  --> src/error.rs:9:26
[INFO] [stdout]   |
[INFO] [stdout] 9 |     InvalidMatchTemplate(String),
[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] 9 -     InvalidMatchTemplate(String),
[INFO] [stdout] 9 +     InvalidMatchTemplate(()),
[INFO] [stdout]   |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `0` is never read
[INFO] [stdout]   --> src/error.rs:10:24
[INFO] [stdout]    |
[INFO] [stdout] 10 |     InvalidInputFormat(String),
[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] 10 -     InvalidInputFormat(String),
[INFO] [stdout] 10 +     InvalidInputFormat(()),
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 44.15s
[INFO] running `Command { std: "docker" "inspect" "8eac7b7016e6fc83477293f408a8e3be4780f587bb6f765ef5897778280ea070", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "8eac7b7016e6fc83477293f408a8e3be4780f587bb6f765ef5897778280ea070", kill_on_drop: false }`
[INFO] [stdout] 8eac7b7016e6fc83477293f408a8e3be4780f587bb6f765ef5897778280ea070
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+d79d87d4c0f7f0d0785ad6e493cf8cf718ed89a6" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 9d5fb33ab4e449c64954f719091fe43f4c388aea366cac200e934e9ff71178dc
[INFO] running `Command { std: "docker" "start" "-a" "9d5fb33ab4e449c64954f719091fe43f4c388aea366cac200e934e9ff71178dc", kill_on_drop: false }`
[INFO] [stderr]    Compiling rustix v0.37.20
[INFO] [stderr]    Compiling num-traits v0.2.15
[INFO] [stderr]    Compiling regex-automata v0.3.2
[INFO] [stderr]    Compiling aho-corasick v0.7.20
[INFO] [stderr]    Compiling predicates-core v1.0.6
[INFO] [stderr]    Compiling either v1.8.1
[INFO] [stderr]    Compiling doc-comment v0.3.3
[INFO] [stderr]    Compiling log v0.4.19
[INFO] [stderr]    Compiling walkdir v2.3.3
[INFO] [stderr]    Compiling thread_local v1.1.7
[INFO] [stderr]    Compiling tempfile v3.6.0
[INFO] [stderr]    Compiling itertools v0.10.5
[INFO] [stderr]    Compiling termtree v0.4.1
[INFO] [stderr]    Compiling normalize-line-endings v0.3.0
[INFO] [stderr]    Compiling difflib v0.4.0
[INFO] [stderr]    Compiling predicates-tree v1.0.9
[INFO] [stderr]    Compiling fastrand v1.9.0
[INFO] [stderr]    Compiling wait-timeout v0.2.0
[INFO] [stderr]    Compiling float-cmp v0.9.0
[INFO] [stderr]    Compiling is-terminal v0.4.7
[INFO] [stderr]    Compiling regex v1.9.1
[INFO] [stderr]    Compiling bstr v1.6.0
[INFO] [stderr]    Compiling anstream v0.3.2
[INFO] [stderr]    Compiling clap_builder v4.3.8
[INFO] [stderr]    Compiling predicates v3.0.3
[INFO] [stderr]    Compiling globset v0.4.10
[INFO] [stderr]    Compiling assert_cmd v2.0.11
[INFO] [stderr]    Compiling ignore v0.4.20
[INFO] [stderr]    Compiling globwalk v0.8.1
[INFO] [stderr]    Compiling assert_fs v1.0.13
[INFO] [stderr]    Compiling clap v4.3.8
[INFO] [stderr]    Compiling picnic-rs v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: field `0` is never read
[INFO] [stdout]  --> src/error.rs:6:8
[INFO] [stdout]   |
[INFO] [stdout] 6 |     Io(io::Error),
[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]   = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[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] 6 -     Io(io::Error),
[INFO] [stdout] 6 +     Io(()),
[INFO] [stdout]   |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `0` is never read
[INFO] [stdout]  --> src/error.rs:7:10
[INFO] [stdout]   |
[INFO] [stdout] 7 |     Json(serde_json::Error),
[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] 7 -     Json(serde_json::Error),
[INFO] [stdout] 7 +     Json(()),
[INFO] [stdout]   |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `0` and `1` are never read
[INFO] [stdout]  --> src/error.rs:8:15
[INFO] [stdout]   |
[INFO] [stdout] 8 |     LineParse(String, usize),
[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] 8 -     LineParse(String, usize),
[INFO] [stdout] 8 +     LineParse((), ()),
[INFO] [stdout]   |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `0` is never read
[INFO] [stdout]  --> src/error.rs:9:26
[INFO] [stdout]   |
[INFO] [stdout] 9 |     InvalidMatchTemplate(String),
[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] 9 -     InvalidMatchTemplate(String),
[INFO] [stdout] 9 +     InvalidMatchTemplate(()),
[INFO] [stdout]   |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `0` is never read
[INFO] [stdout]   --> src/error.rs:10:24
[INFO] [stdout]    |
[INFO] [stdout] 10 |     InvalidInputFormat(String),
[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] 10 -     InvalidInputFormat(String),
[INFO] [stdout] 10 +     InvalidInputFormat(()),
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `0` is never read
[INFO] [stdout]  --> src/error.rs:6:8
[INFO] [stdout]   |
[INFO] [stdout] 6 |     Io(io::Error),
[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]   = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[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] 6 -     Io(io::Error),
[INFO] [stdout] 6 +     Io(()),
[INFO] [stdout]   |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `0` is never read
[INFO] [stdout]  --> src/error.rs:7:10
[INFO] [stdout]   |
[INFO] [stdout] 7 |     Json(serde_json::Error),
[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] 7 -     Json(serde_json::Error),
[INFO] [stdout] 7 +     Json(()),
[INFO] [stdout]   |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `0` and `1` are never read
[INFO] [stdout]  --> src/error.rs:8:15
[INFO] [stdout]   |
[INFO] [stdout] 8 |     LineParse(String, usize),
[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] 8 -     LineParse(String, usize),
[INFO] [stdout] 8 +     LineParse((), ()),
[INFO] [stdout]   |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `0` is never read
[INFO] [stdout]  --> src/error.rs:9:26
[INFO] [stdout]   |
[INFO] [stdout] 9 |     InvalidMatchTemplate(String),
[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] 9 -     InvalidMatchTemplate(String),
[INFO] [stdout] 9 +     InvalidMatchTemplate(()),
[INFO] [stdout]   |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `0` is never read
[INFO] [stdout]   --> src/error.rs:10:24
[INFO] [stdout]    |
[INFO] [stdout] 10 |     InvalidInputFormat(String),
[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] 10 -     InvalidInputFormat(String),
[INFO] [stdout] 10 +     InvalidInputFormat(()),
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 27.71s
[INFO] running `Command { std: "docker" "inspect" "9d5fb33ab4e449c64954f719091fe43f4c388aea366cac200e934e9ff71178dc", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "9d5fb33ab4e449c64954f719091fe43f4c388aea366cac200e934e9ff71178dc", kill_on_drop: false }`
[INFO] [stdout] 9d5fb33ab4e449c64954f719091fe43f4c388aea366cac200e934e9ff71178dc
