[INFO] fetching crate arc-fmt 0.1.0...
[INFO] testing arc-fmt-0.1.0 against 1.54.0 for beta-1.55-1
[INFO] extracting crate arc-fmt 0.1.0 into /workspace/builds/worker-15/source
[INFO] validating manifest of crates.io crate arc-fmt 0.1.0 on toolchain 1.54.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.54.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate arc-fmt 0.1.0
[INFO] finished tweaking crates.io crate arc-fmt 0.1.0
[INFO] tweaked toml for crates.io crate arc-fmt 0.1.0 written to /workspace/builds/worker-15/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.54.0" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.54.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-15/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-15/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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+1.54.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 06a56ff87da3eb93d08d1f814971bae4b24dadabf234830190b42b3412da7979
[INFO] running `Command { std: "docker" "start" "-a" "06a56ff87da3eb93d08d1f814971bae4b24dadabf234830190b42b3412da7979", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "06a56ff87da3eb93d08d1f814971bae4b24dadabf234830190b42b3412da7979", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "06a56ff87da3eb93d08d1f814971bae4b24dadabf234830190b42b3412da7979", kill_on_drop: false }`
[INFO] [stdout] 06a56ff87da3eb93d08d1f814971bae4b24dadabf234830190b42b3412da7979
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-15/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-15/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=warn" "-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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+1.54.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 938fc0b2de01451b8aaeadfeef3e33b139a004c3b3186cc110429f295657a9a8
[INFO] running `Command { std: "docker" "start" "-a" "938fc0b2de01451b8aaeadfeef3e33b139a004c3b3186cc110429f295657a9a8", kill_on_drop: false }`
[INFO] [stderr]    Compiling ucd-trie v0.1.3
[INFO] [stderr]    Compiling unicode-width v0.1.8
[INFO] [stderr]    Compiling textwrap v0.11.0
[INFO] [stderr]    Compiling pest v2.1.3
[INFO] [stderr]    Compiling arc_parser v0.2.0
[INFO] [stderr]    Compiling arc-fmt v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: value assigned to `text` is never read
[INFO] [stdout]    --> src/formatter.rs:225:17
[INFO] [stdout]     |
[INFO] [stdout] 225 |         let mut text = String::new();
[INFO] [stdout]     |                 ^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_assignments)]` on by default
[INFO] [stdout]     = help: maybe it is overwritten before being read?
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `text`
[INFO] [stdout]    --> src/formatter.rs:239:17
[INFO] [stdout]     |
[INFO] [stdout] 239 |         let mut text = String::new();
[INFO] [stdout]     |                 ^^^^ help: if this is intentional, prefix it with an underscore: `_text`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/formatter.rs:36:13
[INFO] [stdout]    |
[INFO] [stdout] 36 |         let mut code = String::new();
[INFO] [stdout]    |             ----^^^^
[INFO] [stdout]    |             |
[INFO] [stdout]    |             help: remove this `mut`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_mut)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/formatter.rs:200:13
[INFO] [stdout]     |
[INFO] [stdout] 200 |         let mut code = String::new();
[INFO] [stdout]     |             ----^^^^
[INFO] [stdout]     |             |
[INFO] [stdout]     |             help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/formatter.rs:224:13
[INFO] [stdout]     |
[INFO] [stdout] 224 |         let mut code = String::new();
[INFO] [stdout]     |             ----^^^^
[INFO] [stdout]     |             |
[INFO] [stdout]     |             help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/formatter.rs:238:13
[INFO] [stdout]     |
[INFO] [stdout] 238 |         let mut code = String::new();
[INFO] [stdout]     |             ----^^^^
[INFO] [stdout]     |             |
[INFO] [stdout]     |             help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/formatter.rs:239:13
[INFO] [stdout]     |
[INFO] [stdout] 239 |         let mut text = String::new();
[INFO] [stdout]     |             ----^^^^
[INFO] [stdout]     |             |
[INFO] [stdout]     |             help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 7 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 3.75s
[INFO] running `Command { std: "docker" "inspect" "938fc0b2de01451b8aaeadfeef3e33b139a004c3b3186cc110429f295657a9a8", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "938fc0b2de01451b8aaeadfeef3e33b139a004c3b3186cc110429f295657a9a8", kill_on_drop: false }`
[INFO] [stdout] 938fc0b2de01451b8aaeadfeef3e33b139a004c3b3186cc110429f295657a9a8
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-15/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-15/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=warn" "-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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+1.54.0" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] a5ac40781000774270a27397b0c872bf198cfdbf69f44fba9879290ff9c0beb5
[INFO] running `Command { std: "docker" "start" "-a" "a5ac40781000774270a27397b0c872bf198cfdbf69f44fba9879290ff9c0beb5", kill_on_drop: false }`
[INFO] [stderr]    Compiling arc-fmt v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: value assigned to `text` is never read
[INFO] [stdout]    --> src/formatter.rs:225:17
[INFO] [stdout]     |
[INFO] [stdout] 225 |         let mut text = String::new();
[INFO] [stdout]     |                 ^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_assignments)]` on by default
[INFO] [stdout]     = help: maybe it is overwritten before being read?
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `text`
[INFO] [stdout]    --> src/formatter.rs:239:17
[INFO] [stdout]     |
[INFO] [stdout] 239 |         let mut text = String::new();
[INFO] [stdout]     |                 ^^^^ help: if this is intentional, prefix it with an underscore: `_text`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/formatter.rs:36:13
[INFO] [stdout]    |
[INFO] [stdout] 36 |         let mut code = String::new();
[INFO] [stdout]    |             ----^^^^
[INFO] [stdout]    |             |
[INFO] [stdout]    |             help: remove this `mut`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_mut)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/formatter.rs:200:13
[INFO] [stdout]     |
[INFO] [stdout] 200 |         let mut code = String::new();
[INFO] [stdout]     |             ----^^^^
[INFO] [stdout]     |             |
[INFO] [stdout]     |             help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/formatter.rs:224:13
[INFO] [stdout]     |
[INFO] [stdout] 224 |         let mut code = String::new();
[INFO] [stdout]     |             ----^^^^
[INFO] [stdout]     |             |
[INFO] [stdout]     |             help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/formatter.rs:238:13
[INFO] [stdout]     |
[INFO] [stdout] 238 |         let mut code = String::new();
[INFO] [stdout]     |             ----^^^^
[INFO] [stdout]     |             |
[INFO] [stdout]     |             help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/formatter.rs:239:13
[INFO] [stdout]     |
[INFO] [stdout] 239 |         let mut text = String::new();
[INFO] [stdout]     |             ----^^^^
[INFO] [stdout]     |             |
[INFO] [stdout]     |             help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 7 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]  --> tests/do_fmt.rs:8:5
[INFO] [stdout]   |
[INFO] [stdout] 8 |     s.format_file("tests/package.json", "tests/out/package.arc");
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout]   = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> tests/do_fmt.rs:14:5
[INFO] [stdout]    |
[INFO] [stdout] 14 |     s.format_file("tests/user_data.json", "tests/out/user_data.arc");
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `text` is never read
[INFO] [stdout]    --> src/formatter.rs:225:17
[INFO] [stdout]     |
[INFO] [stdout] 225 |         let mut text = String::new();
[INFO] [stdout]     |                 ^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_assignments)]` on by default
[INFO] [stdout]     = help: maybe it is overwritten before being read?
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `text`
[INFO] [stdout]    --> src/formatter.rs:239:17
[INFO] [stdout]     |
[INFO] [stdout] 239 |         let mut text = String::new();
[INFO] [stdout]     |                 ^^^^ help: if this is intentional, prefix it with an underscore: `_text`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/formatter.rs:36:13
[INFO] [stdout]    |
[INFO] [stdout] 36 |         let mut code = String::new();
[INFO] [stdout]    |             ----^^^^
[INFO] [stdout]    |             |
[INFO] [stdout]    |             help: remove this `mut`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_mut)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/formatter.rs:200:13
[INFO] [stdout]     |
[INFO] [stdout] 200 |         let mut code = String::new();
[INFO] [stdout]     |             ----^^^^
[INFO] [stdout]     |             |
[INFO] [stdout]     |             help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/formatter.rs:224:13
[INFO] [stdout]     |
[INFO] [stdout] 224 |         let mut code = String::new();
[INFO] [stdout]     |             ----^^^^
[INFO] [stdout]     |             |
[INFO] [stdout]     |             help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/formatter.rs:238:13
[INFO] [stdout]     |
[INFO] [stdout] 238 |         let mut code = String::new();
[INFO] [stdout]     |             ----^^^^
[INFO] [stdout]     |             |
[INFO] [stdout]     |             help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/formatter.rs:239:13
[INFO] [stdout]     |
[INFO] [stdout] 239 |         let mut text = String::new();
[INFO] [stdout]     |             ----^^^^
[INFO] [stdout]     |             |
[INFO] [stdout]     |             help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 7 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.55s
[INFO] running `Command { std: "docker" "inspect" "a5ac40781000774270a27397b0c872bf198cfdbf69f44fba9879290ff9c0beb5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a5ac40781000774270a27397b0c872bf198cfdbf69f44fba9879290ff9c0beb5", kill_on_drop: false }`
[INFO] [stdout] a5ac40781000774270a27397b0c872bf198cfdbf69f44fba9879290ff9c0beb5
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-15/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-15/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=warn" "-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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+1.54.0" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] abf7fca773a0b2e181e6084babc24eaa66acbe6923b378eebf4959383a7df1a4
[INFO] running `Command { std: "docker" "start" "-a" "abf7fca773a0b2e181e6084babc24eaa66acbe6923b378eebf4959383a7df1a4", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr] warning: value assigned to `text` is never read
[INFO] [stderr]    --> src/formatter.rs:225:17
[INFO] [stderr]     |
[INFO] [stderr] 225 |         let mut text = String::new();
[INFO] [stderr]     |                 ^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_assignments)]` on by default
[INFO] [stderr]     = help: maybe it is overwritten before being read?
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `text`
[INFO] [stderr]    --> src/formatter.rs:239:17
[INFO] [stderr]     |
[INFO] [stderr] 239 |         let mut text = String::new();
[INFO] [stderr]     |                 ^^^^ help: if this is intentional, prefix it with an underscore: `_text`
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/formatter.rs:36:13
[INFO] [stderr]    |
[INFO] [stderr] 36 |         let mut code = String::new();
[INFO] [stderr]    |             ----^^^^
[INFO] [stderr]    |             |
[INFO] [stderr]    |             help: remove this `mut`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_mut)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/formatter.rs:200:13
[INFO] [stderr]     |
[INFO] [stderr] 200 |         let mut code = String::new();
[INFO] [stderr]     |             ----^^^^
[INFO] [stderr]     |             |
[INFO] [stderr]     |             help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/formatter.rs:224:13
[INFO] [stderr]     |
[INFO] [stderr] 224 |         let mut code = String::new();
[INFO] [stderr]     |             ----^^^^
[INFO] [stderr]     |             |
[INFO] [stderr]     |             help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/formatter.rs:238:13
[INFO] [stderr]     |
[INFO] [stderr] 238 |         let mut code = String::new();
[INFO] [stderr]     |             ----^^^^
[INFO] [stderr]     |             |
[INFO] [stderr]     |             help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/formatter.rs:239:13
[INFO] [stderr]     |
[INFO] [stderr] 239 |         let mut text = String::new();
[INFO] [stderr]     |             ----^^^^
[INFO] [stderr]     |             |
[INFO] [stderr]     |             help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: 7 warnings emitted
[INFO] [stderr] 
[INFO] [stderr] warning: value assigned to `text` is never read
[INFO] [stderr]    --> src/formatter.rs:225:17
[INFO] [stderr]     |
[INFO] [stderr] 225 |         let mut text = String::new();
[INFO] [stderr]     |                 ^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_assignments)]` on by default
[INFO] [stderr]     = help: maybe it is overwritten before being read?
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `text`
[INFO] [stderr]    --> src/formatter.rs:239:17
[INFO] [stderr]     |
[INFO] [stderr] 239 |         let mut text = String::new();
[INFO] [stderr]     |                 ^^^^ help: if this is intentional, prefix it with an underscore: `_text`
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/formatter.rs:36:13
[INFO] [stderr]    |
[INFO] [stderr] 36 |         let mut code = String::new();
[INFO] [stderr]    |             ----^^^^
[INFO] [stderr]    |             |
[INFO] [stderr]    |             help: remove this `mut`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_mut)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/formatter.rs:200:13
[INFO] [stderr]     |
[INFO] [stderr] 200 |         let mut code = String::new();
[INFO] [stderr]     |             ----^^^^
[INFO] [stderr]     |             |
[INFO] [stderr]     |             help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/formatter.rs:224:13
[INFO] [stderr]     |
[INFO] [stderr] 224 |         let mut code = String::new();
[INFO] [stderr]     |             ----^^^^
[INFO] [stderr]     |             |
[INFO] [stderr]     |             help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/formatter.rs:238:13
[INFO] [stderr]     |
[INFO] [stderr] 238 |         let mut code = String::new();
[INFO] [stderr]     |             ----^^^^
[INFO] [stderr]     |             |
[INFO] [stderr]     |             help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/formatter.rs:239:13
[INFO] [stderr]     |
[INFO] [stderr] 239 |         let mut text = String::new();
[INFO] [stderr]     |             ----^^^^
[INFO] [stderr]     |             |
[INFO] [stderr]     |             help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: 7 warnings emitted
[INFO] [stderr] 
[INFO] [stderr] warning: unused `Result` that must be used
[INFO] [stderr]  --> tests/do_fmt.rs:8:5
[INFO] [stderr]   |
[INFO] [stderr] 8 |     s.format_file("tests/package.json", "tests/out/package.arc");
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_must_use)]` on by default
[INFO] [stderr]   = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] 
[INFO] [stdout] 
[INFO] [stderr] warning: unused `Result` that must be used
[INFO] [stdout] running 0 tests
[INFO] [stderr]   --> tests/do_fmt.rs:14:5
[INFO] [stdout] 
[INFO] [stderr]    |
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stderr] 14 |     s.format_file("tests/user_data.json", "tests/out/user_data.arc");
[INFO] [stdout] 
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] 
[INFO] [stderr] warning: 2 warnings emitted
[INFO] [stderr] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.21s
[INFO] [stderr]      Running unittests (/opt/rustwide/target/debug/deps/arc_fmt-86ebe0e11e35168e)
[INFO] [stderr]      Running tests/do_fmt.rs (/opt/rustwide/target/debug/deps/do_fmt-a8858ab82936008b)
[INFO] [stdout] 
[INFO] [stdout] running 2 tests
[INFO] [stdout] test fmt_packages ... ok
[INFO] [stderr]    Doc-tests arc-fmt
[INFO] [stdout] test fmt_user_data ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 2 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.10s
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "abf7fca773a0b2e181e6084babc24eaa66acbe6923b378eebf4959383a7df1a4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "abf7fca773a0b2e181e6084babc24eaa66acbe6923b378eebf4959383a7df1a4", kill_on_drop: false }`
[INFO] [stdout] abf7fca773a0b2e181e6084babc24eaa66acbe6923b378eebf4959383a7df1a4
