[INFO] fetching crate simple_peg 0.3.0...
[INFO] building simple_peg-0.3.0 against master#c7f6aa2869acdbf014d094c6e427e554e160b6db for pr-146237-2
[INFO] extracting crate simple_peg 0.3.0 into /workspace/builds/worker-1-tc1/source
[INFO] started tweaking crates.io crate simple_peg 0.3.0
[INFO] finished tweaking crates.io crate simple_peg 0.3.0
[INFO] tweaked toml for crates.io crate simple_peg 0.3.0 written to /workspace/builds/worker-1-tc1/source/Cargo.toml
[INFO] validating manifest of crates.io crate simple_peg 0.3.0 on toolchain c7f6aa2869acdbf014d094c6e427e554e160b6db
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+c7f6aa2869acdbf014d094c6e427e554e160b6db" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate crates.io crate simple_peg 0.3.0 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" "+c7f6aa2869acdbf014d094c6e427e554e160b6db" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+c7f6aa2869acdbf014d094c6e427e554e160b6db" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 4ee6bd6b4cd3237be7fb1257a998c8b2b0d029434583543b0d826be5711e0d9e
[INFO] running `Command { std: "docker" "start" "-a" "4ee6bd6b4cd3237be7fb1257a998c8b2b0d029434583543b0d826be5711e0d9e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "4ee6bd6b4cd3237be7fb1257a998c8b2b0d029434583543b0d826be5711e0d9e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "4ee6bd6b4cd3237be7fb1257a998c8b2b0d029434583543b0d826be5711e0d9e", kill_on_drop: false }`
[INFO] [stdout] 4ee6bd6b4cd3237be7fb1257a998c8b2b0d029434583543b0d826be5711e0d9e
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+c7f6aa2869acdbf014d094c6e427e554e160b6db" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] a99baaea6884c5940cffdda2ce6fbfc418cf90bf8d3f63745cca9c4c1148e0a3
[INFO] running `Command { std: "docker" "start" "-a" "a99baaea6884c5940cffdda2ce6fbfc418cf90bf8d3f63745cca9c4c1148e0a3", kill_on_drop: false }`
[INFO] [stderr]    Compiling simple_peg v0.3.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused variable: `stack`
[INFO] [stdout]   --> src/peg.rs:91:13
[INFO] [stdout]    |
[INFO] [stdout] 91 |     let mut stack: Vec<Option<State<String>>> = Vec::new();
[INFO] [stdout]    |             ^^^^^ help: if this is intentional, prefix it with an underscore: `_stack`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/peg.rs:91:9
[INFO] [stdout]    |
[INFO] [stdout] 91 |     let mut stack: Vec<Option<State<String>>> = Vec::new();
[INFO] [stdout]    |         ----^^^^^
[INFO] [stdout]    |         |
[INFO] [stdout]    |         help: remove this `mut`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_mut)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `stack`
[INFO] [stdout]    --> src/peg.rs:205:13
[INFO] [stdout]     |
[INFO] [stdout] 205 |     let mut stack: Vec<Option<State<String>>> = Vec::new();
[INFO] [stdout]     |             ^^^^^ help: if this is intentional, prefix it with an underscore: `_stack`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/peg.rs:205:9
[INFO] [stdout]     |
[INFO] [stdout] 205 |     let mut stack: Vec<Option<State<String>>> = Vec::new();
[INFO] [stdout]     |         ----^^^^^
[INFO] [stdout]     |         |
[INFO] [stdout]     |         help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `stack`
[INFO] [stdout]    --> src/peg.rs:670:13
[INFO] [stdout]     |
[INFO] [stdout] 670 |     let mut stack: Vec<Option<State<String>>> = Vec::new();
[INFO] [stdout]     |             ^^^^^ help: if this is intentional, prefix it with an underscore: `_stack`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/peg.rs:670:9
[INFO] [stdout]     |
[INFO] [stdout] 670 |     let mut stack: Vec<Option<State<String>>> = Vec::new();
[INFO] [stdout]     |         ----^^^^^
[INFO] [stdout]     |         |
[INFO] [stdout]     |         help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `stack`
[INFO] [stdout]    --> src/peg.rs:714:13
[INFO] [stdout]     |
[INFO] [stdout] 714 |     let mut stack: Vec<Option<State<String>>> = Vec::new();
[INFO] [stdout]     |             ^^^^^ help: if this is intentional, prefix it with an underscore: `_stack`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/peg.rs:714:9
[INFO] [stdout]     |
[INFO] [stdout] 714 |     let mut stack: Vec<Option<State<String>>> = Vec::new();
[INFO] [stdout]     |         ----^^^^^
[INFO] [stdout]     |         |
[INFO] [stdout]     |         help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `stack`
[INFO] [stdout]     --> src/peg.rs:1034:13
[INFO] [stdout]      |
[INFO] [stdout] 1034 |     let mut stack: Vec<Option<State<String>>> = Vec::new();
[INFO] [stdout]      |             ^^^^^ help: if this is intentional, prefix it with an underscore: `_stack`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]     --> src/peg.rs:1034:9
[INFO] [stdout]      |
[INFO] [stdout] 1034 |     let mut stack: Vec<Option<State<String>>> = Vec::new();
[INFO] [stdout]      |         ----^^^^^
[INFO] [stdout]      |         |
[INFO] [stdout]      |         help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `stack`
[INFO] [stdout]     --> src/peg.rs:1286:13
[INFO] [stdout]      |
[INFO] [stdout] 1286 |     let mut stack: Vec<Option<State<String>>> = Vec::new();
[INFO] [stdout]      |             ^^^^^ help: if this is intentional, prefix it with an underscore: `_stack`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]     --> src/peg.rs:1286:9
[INFO] [stdout]      |
[INFO] [stdout] 1286 |     let mut stack: Vec<Option<State<String>>> = Vec::new();
[INFO] [stdout]      |         ----^^^^^
[INFO] [stdout]      |         |
[INFO] [stdout]      |         help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `stack`
[INFO] [stdout]     --> src/peg.rs:1341:13
[INFO] [stdout]      |
[INFO] [stdout] 1341 |     let mut stack: Vec<Option<State<String>>> = Vec::new();
[INFO] [stdout]      |             ^^^^^ help: if this is intentional, prefix it with an underscore: `_stack`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]     --> src/peg.rs:1341:9
[INFO] [stdout]      |
[INFO] [stdout] 1341 |     let mut stack: Vec<Option<State<String>>> = Vec::new();
[INFO] [stdout]      |         ----^^^^^
[INFO] [stdout]      |         |
[INFO] [stdout]      |         help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `stack`
[INFO] [stdout]     --> src/peg.rs:1396:13
[INFO] [stdout]      |
[INFO] [stdout] 1396 |     let mut stack: Vec<Option<State<String>>> = Vec::new();
[INFO] [stdout]      |             ^^^^^ help: if this is intentional, prefix it with an underscore: `_stack`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]     --> src/peg.rs:1396:9
[INFO] [stdout]      |
[INFO] [stdout] 1396 |     let mut stack: Vec<Option<State<String>>> = Vec::new();
[INFO] [stdout]      |         ----^^^^^
[INFO] [stdout]      |         |
[INFO] [stdout]      |         help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `stack`
[INFO] [stdout]     --> src/peg.rs:1542:13
[INFO] [stdout]      |
[INFO] [stdout] 1542 |     let mut stack: Vec<Option<State<String>>> = Vec::new();
[INFO] [stdout]      |             ^^^^^ help: if this is intentional, prefix it with an underscore: `_stack`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]     --> src/peg.rs:1542:9
[INFO] [stdout]      |
[INFO] [stdout] 1542 |     let mut stack: Vec<Option<State<String>>> = Vec::new();
[INFO] [stdout]      |         ----^^^^^
[INFO] [stdout]      |         |
[INFO] [stdout]      |         help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `memo`
[INFO] [stdout]    --> src/utils.rs:144:5
[INFO] [stdout]     |
[INFO] [stdout] 144 |     memo: &'a Memo<String>,
[INFO] [stdout]     |     ^^^^ help: if this is intentional, prefix it with an underscore: `_memo`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.57s
[INFO] running `Command { std: "docker" "inspect" "a99baaea6884c5940cffdda2ce6fbfc418cf90bf8d3f63745cca9c4c1148e0a3", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a99baaea6884c5940cffdda2ce6fbfc418cf90bf8d3f63745cca9c4c1148e0a3", kill_on_drop: false }`
[INFO] [stdout] a99baaea6884c5940cffdda2ce6fbfc418cf90bf8d3f63745cca9c4c1148e0a3
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+c7f6aa2869acdbf014d094c6e427e554e160b6db" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 9d4e5b17f0b593b86ce3948476d88bf84d906426e0bf1a35be4d4e1dc80f1d9e
[INFO] running `Command { std: "docker" "start" "-a" "9d4e5b17f0b593b86ce3948476d88bf84d906426e0bf1a35be4d4e1dc80f1d9e", kill_on_drop: false }`
[INFO] [stderr]    Compiling simple_peg v0.3.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused variable: `stack`
[INFO] [stdout]   --> src/peg.rs:91:13
[INFO] [stdout]    |
[INFO] [stdout] 91 |     let mut stack: Vec<Option<State<String>>> = Vec::new();
[INFO] [stdout]    |             ^^^^^ help: if this is intentional, prefix it with an underscore: `_stack`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/peg.rs:91:9
[INFO] [stdout]    |
[INFO] [stdout] 91 |     let mut stack: Vec<Option<State<String>>> = Vec::new();
[INFO] [stdout]    |         ----^^^^^
[INFO] [stdout]    |         |
[INFO] [stdout]    |         help: remove this `mut`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_mut)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `stack`
[INFO] [stdout]    --> src/peg.rs:205:13
[INFO] [stdout]     |
[INFO] [stdout] 205 |     let mut stack: Vec<Option<State<String>>> = Vec::new();
[INFO] [stdout]     |             ^^^^^ help: if this is intentional, prefix it with an underscore: `_stack`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/peg.rs:205:9
[INFO] [stdout]     |
[INFO] [stdout] 205 |     let mut stack: Vec<Option<State<String>>> = Vec::new();
[INFO] [stdout]     |         ----^^^^^
[INFO] [stdout]     |         |
[INFO] [stdout]     |         help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `stack`
[INFO] [stdout]    --> src/peg.rs:670:13
[INFO] [stdout]     |
[INFO] [stdout] 670 |     let mut stack: Vec<Option<State<String>>> = Vec::new();
[INFO] [stdout]     |             ^^^^^ help: if this is intentional, prefix it with an underscore: `_stack`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/peg.rs:670:9
[INFO] [stdout]     |
[INFO] [stdout] 670 |     let mut stack: Vec<Option<State<String>>> = Vec::new();
[INFO] [stdout]     |         ----^^^^^
[INFO] [stdout]     |         |
[INFO] [stdout]     |         help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `stack`
[INFO] [stdout]    --> src/peg.rs:714:13
[INFO] [stdout]     |
[INFO] [stdout] 714 |     let mut stack: Vec<Option<State<String>>> = Vec::new();
[INFO] [stdout]     |             ^^^^^ help: if this is intentional, prefix it with an underscore: `_stack`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/peg.rs:714:9
[INFO] [stdout]     |
[INFO] [stdout] 714 |     let mut stack: Vec<Option<State<String>>> = Vec::new();
[INFO] [stdout]     |         ----^^^^^
[INFO] [stdout]     |         |
[INFO] [stdout]     |         help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `stack`
[INFO] [stdout]     --> src/peg.rs:1034:13
[INFO] [stdout]      |
[INFO] [stdout] 1034 |     let mut stack: Vec<Option<State<String>>> = Vec::new();
[INFO] [stdout]      |             ^^^^^ help: if this is intentional, prefix it with an underscore: `_stack`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]     --> src/peg.rs:1034:9
[INFO] [stdout]      |
[INFO] [stdout] 1034 |     let mut stack: Vec<Option<State<String>>> = Vec::new();
[INFO] [stdout]      |         ----^^^^^
[INFO] [stdout]      |         |
[INFO] [stdout]      |         help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `stack`
[INFO] [stdout]     --> src/peg.rs:1286:13
[INFO] [stdout]      |
[INFO] [stdout] 1286 |     let mut stack: Vec<Option<State<String>>> = Vec::new();
[INFO] [stdout]      |             ^^^^^ help: if this is intentional, prefix it with an underscore: `_stack`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]     --> src/peg.rs:1286:9
[INFO] [stdout]      |
[INFO] [stdout] 1286 |     let mut stack: Vec<Option<State<String>>> = Vec::new();
[INFO] [stdout]      |         ----^^^^^
[INFO] [stdout]      |         |
[INFO] [stdout]      |         help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `stack`
[INFO] [stdout]     --> src/peg.rs:1341:13
[INFO] [stdout]      |
[INFO] [stdout] 1341 |     let mut stack: Vec<Option<State<String>>> = Vec::new();
[INFO] [stdout]      |             ^^^^^ help: if this is intentional, prefix it with an underscore: `_stack`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]     --> src/peg.rs:1341:9
[INFO] [stdout]      |
[INFO] [stdout] 1341 |     let mut stack: Vec<Option<State<String>>> = Vec::new();
[INFO] [stdout]      |         ----^^^^^
[INFO] [stdout]      |         |
[INFO] [stdout]      |         help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `stack`
[INFO] [stdout]     --> src/peg.rs:1396:13
[INFO] [stdout]      |
[INFO] [stdout] 1396 |     let mut stack: Vec<Option<State<String>>> = Vec::new();
[INFO] [stdout]      |             ^^^^^ help: if this is intentional, prefix it with an underscore: `_stack`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]     --> src/peg.rs:1396:9
[INFO] [stdout]      |
[INFO] [stdout] 1396 |     let mut stack: Vec<Option<State<String>>> = Vec::new();
[INFO] [stdout]      |         ----^^^^^
[INFO] [stdout]      |         |
[INFO] [stdout]      |         help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `stack`
[INFO] [stdout]     --> src/peg.rs:1542:13
[INFO] [stdout]      |
[INFO] [stdout] 1542 |     let mut stack: Vec<Option<State<String>>> = Vec::new();
[INFO] [stdout]      |             ^^^^^ help: if this is intentional, prefix it with an underscore: `_stack`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]     --> src/peg.rs:1542:9
[INFO] [stdout]      |
[INFO] [stdout] 1542 |     let mut stack: Vec<Option<State<String>>> = Vec::new();
[INFO] [stdout]      |         ----^^^^^
[INFO] [stdout]      |         |
[INFO] [stdout]      |         help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `memo`
[INFO] [stdout]    --> src/utils.rs:144:5
[INFO] [stdout]     |
[INFO] [stdout] 144 |     memo: &'a Memo<String>,
[INFO] [stdout]     |     ^^^^ help: if this is intentional, prefix it with an underscore: `_memo`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.27s
[INFO] running `Command { std: "docker" "inspect" "9d4e5b17f0b593b86ce3948476d88bf84d906426e0bf1a35be4d4e1dc80f1d9e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "9d4e5b17f0b593b86ce3948476d88bf84d906426e0bf1a35be4d4e1dc80f1d9e", kill_on_drop: false }`
[INFO] [stdout] 9d4e5b17f0b593b86ce3948476d88bf84d906426e0bf1a35be4d4e1dc80f1d9e
