[INFO] cloning repository https://github.com/jorendorff/parse-and-order
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/jorendorff/parse-and-order" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fjorendorff%2Fparse-and-order", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fjorendorff%2Fparse-and-order'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 745a50ec830a627176cb306789573a35578f9434
[INFO] testing jorendorff/parse-and-order against master#1f7f8ea0721a3b1eb73e6c6d25cccb371434b320 for pr-154065-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fjorendorff%2Fparse-and-order" "/workspace/builds/worker-6-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-6-tc1/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/jorendorff/parse-and-order
[INFO] finished tweaking git repo https://github.com/jorendorff/parse-and-order
[INFO] tweaked toml for git repo https://github.com/jorendorff/parse-and-order written to /workspace/builds/worker-6-tc1/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/jorendorff/parse-and-order on toolchain 1f7f8ea0721a3b1eb73e6c6d25cccb371434b320
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1f7f8ea0721a3b1eb73e6c6d25cccb371434b320" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/jorendorff/parse-and-order 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" "+1f7f8ea0721a3b1eb73e6c6d25cccb371434b320" "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] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded thiserror v1.0.30
[INFO] [stderr]   Downloaded quote v1.0.15
[INFO] [stderr]   Downloaded proc-macro2 v1.0.36
[INFO] [stderr]   Downloaded serde_derive v1.0.136
[INFO] [stderr]   Downloaded thiserror-impl v1.0.30
[INFO] [stderr]   Downloaded unicode-xid v0.2.2
[INFO] [stderr]   Downloaded syn v1.0.86
[INFO] [stderr]   Downloaded serde v1.0.136
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+1f7f8ea0721a3b1eb73e6c6d25cccb371434b320" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] b8f63b27e23816c745bd06a8d1d2cad4f5ca8ac579684b7d94072c2386b4e900
[INFO] running `Command { std: "docker" "start" "-a" "b8f63b27e23816c745bd06a8d1d2cad4f5ca8ac579684b7d94072c2386b4e900", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "b8f63b27e23816c745bd06a8d1d2cad4f5ca8ac579684b7d94072c2386b4e900", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b8f63b27e23816c745bd06a8d1d2cad4f5ca8ac579684b7d94072c2386b4e900", kill_on_drop: false }`
[INFO] [stdout] b8f63b27e23816c745bd06a8d1d2cad4f5ca8ac579684b7d94072c2386b4e900
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+1f7f8ea0721a3b1eb73e6c6d25cccb371434b320" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 9fc05b1e01384709975b10eb362574f61185fd7e77b09b8e8ba9cb6e75b7b1bd
[INFO] running `Command { std: "docker" "start" "-a" "9fc05b1e01384709975b10eb362574f61185fd7e77b09b8e8ba9cb6e75b7b1bd", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.36
[INFO] [stderr]    Compiling unicode-xid v0.2.2
[INFO] [stderr]    Compiling syn v1.0.86
[INFO] [stderr]    Compiling serde_derive v1.0.136
[INFO] [stderr]    Compiling serde v1.0.136
[INFO] [stderr]    Compiling quote v1.0.15
[INFO] [stderr]    Compiling thiserror-impl v1.0.30
[INFO] [stderr]    Compiling thiserror v1.0.30
[INFO] [stderr]    Compiling zoo v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused variable: `visitor`
[INFO] [stdout]    --> src/de.rs:391:34
[INFO] [stdout]     |
[INFO] [stdout] 391 |     fn deserialize_char<V>(self, visitor: V) -> Result<V::Value, Self::Error>
[INFO] [stdout]     |                                  ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_visitor`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `visitor`
[INFO] [stdout]    --> src/de.rs:419:38
[INFO] [stdout]     |
[INFO] [stdout] 419 |     fn deserialize_byte_buf<V>(self, visitor: V) -> Result<V::Value, Self::Error>
[INFO] [stdout]     |                                      ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_visitor`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `visitor`
[INFO] [stdout]    --> src/de.rs:576:41
[INFO] [stdout]     |
[INFO] [stdout] 576 |     fn deserialize_ignored_any<V>(self, visitor: V) -> Result<V::Value, Self::Error>
[INFO] [stdout]     |                                         ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_visitor`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `0` is never read
[INFO] [stdout]  --> src/model.rs:4:17
[INFO] [stdout]   |
[INFO] [stdout] 4 | pub struct Head(u32);
[INFO] [stdout]   |            ---- ^^^
[INFO] [stdout]   |            |
[INFO] [stdout]   |            field in this struct
[INFO] [stdout]   |
[INFO] [stdout]   = help: consider removing this field
[INFO] [stdout]   = note: `Head` 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: field `0` is never read
[INFO] [stdout]  --> src/model.rs:7:17
[INFO] [stdout]   |
[INFO] [stdout] 7 | pub struct Tail(u32);
[INFO] [stdout]   |            ---- ^^^
[INFO] [stdout]   |            |
[INFO] [stdout]   |            field in this struct
[INFO] [stdout]   |
[INFO] [stdout]   = help: consider removing this field
[INFO] [stdout]   = note: `Tail` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `name` is never read
[INFO] [stdout]   --> src/model.rs:11:5
[INFO] [stdout]    |
[INFO] [stdout] 10 | pub struct Leg {
[INFO] [stdout]    |            --- field in this struct
[INFO] [stdout] 11 |     name: String,
[INFO] [stdout]    |     ^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Leg` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `legs` and `tail` are never read
[INFO] [stdout]   --> src/model.rs:23:16
[INFO] [stdout]    |
[INFO] [stdout] 23 |     Kangaroo { legs: [Leg; 2], tail: Tail },
[INFO] [stdout]    |     --------   ^^^^            ^^^^
[INFO] [stdout]    |     |
[INFO] [stdout]    |     fields in this variant
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Animal` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `0` and `1` are never read
[INFO] [stdout]   --> src/model.rs:28:12
[INFO] [stdout]    |
[INFO] [stdout] 28 |     Python(Head, Tail),
[INFO] [stdout]    |     ------ ^^^^  ^^^^
[INFO] [stdout]    |     |
[INFO] [stdout]    |     fields in this variant
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Animal` 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] 28 -     Python(Head, Tail),
[INFO] [stdout] 28 +     Python((), ()),
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `animals` is never read
[INFO] [stdout]   --> src/model.rs:36:5
[INFO] [stdout]    |
[INFO] [stdout] 35 | pub struct Zoo {
[INFO] [stdout]    |            --- field in this struct
[INFO] [stdout] 36 |     animals: Vec<Animal>,
[INFO] [stdout]    |     ^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Zoo` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 9.63s
[INFO] running `Command { std: "docker" "inspect" "9fc05b1e01384709975b10eb362574f61185fd7e77b09b8e8ba9cb6e75b7b1bd", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "9fc05b1e01384709975b10eb362574f61185fd7e77b09b8e8ba9cb6e75b7b1bd", kill_on_drop: false }`
[INFO] [stdout] 9fc05b1e01384709975b10eb362574f61185fd7e77b09b8e8ba9cb6e75b7b1bd
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+1f7f8ea0721a3b1eb73e6c6d25cccb371434b320" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 0a057ce7754165d2b6458da182cfccc337633f4680892bb96c8f70ac5dc91a6d
[INFO] running `Command { std: "docker" "start" "-a" "0a057ce7754165d2b6458da182cfccc337633f4680892bb96c8f70ac5dc91a6d", kill_on_drop: false }`
[INFO] [stderr]    Compiling zoo v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused variable: `visitor`
[INFO] [stdout]    --> src/de.rs:391:34
[INFO] [stdout]     |
[INFO] [stdout] 391 |     fn deserialize_char<V>(self, visitor: V) -> Result<V::Value, Self::Error>
[INFO] [stdout]     |                                  ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_visitor`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `visitor`
[INFO] [stdout]    --> src/de.rs:419:38
[INFO] [stdout]     |
[INFO] [stdout] 419 |     fn deserialize_byte_buf<V>(self, visitor: V) -> Result<V::Value, Self::Error>
[INFO] [stdout]     |                                      ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_visitor`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `visitor`
[INFO] [stdout]    --> src/de.rs:576:41
[INFO] [stdout]     |
[INFO] [stdout] 576 |     fn deserialize_ignored_any<V>(self, visitor: V) -> Result<V::Value, Self::Error>
[INFO] [stdout]     |                                         ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_visitor`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `0` is never read
[INFO] [stdout]  --> src/model.rs:4:17
[INFO] [stdout]   |
[INFO] [stdout] 4 | pub struct Head(u32);
[INFO] [stdout]   |            ---- ^^^
[INFO] [stdout]   |            |
[INFO] [stdout]   |            field in this struct
[INFO] [stdout]   |
[INFO] [stdout]   = help: consider removing this field
[INFO] [stdout]   = note: `Head` 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: field `0` is never read
[INFO] [stdout]  --> src/model.rs:7:17
[INFO] [stdout]   |
[INFO] [stdout] 7 | pub struct Tail(u32);
[INFO] [stdout]   |            ---- ^^^
[INFO] [stdout]   |            |
[INFO] [stdout]   |            field in this struct
[INFO] [stdout]   |
[INFO] [stdout]   = help: consider removing this field
[INFO] [stdout]   = note: `Tail` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `name` is never read
[INFO] [stdout]   --> src/model.rs:11:5
[INFO] [stdout]    |
[INFO] [stdout] 10 | pub struct Leg {
[INFO] [stdout]    |            --- field in this struct
[INFO] [stdout] 11 |     name: String,
[INFO] [stdout]    |     ^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Leg` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `legs` and `tail` are never read
[INFO] [stdout]   --> src/model.rs:23:16
[INFO] [stdout]    |
[INFO] [stdout] 23 |     Kangaroo { legs: [Leg; 2], tail: Tail },
[INFO] [stdout]    |     --------   ^^^^            ^^^^
[INFO] [stdout]    |     |
[INFO] [stdout]    |     fields in this variant
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Animal` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `0` and `1` are never read
[INFO] [stdout]   --> src/model.rs:28:12
[INFO] [stdout]    |
[INFO] [stdout] 28 |     Python(Head, Tail),
[INFO] [stdout]    |     ------ ^^^^  ^^^^
[INFO] [stdout]    |     |
[INFO] [stdout]    |     fields in this variant
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Animal` 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] 28 -     Python(Head, Tail),
[INFO] [stdout] 28 +     Python((), ()),
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `animals` is never read
[INFO] [stdout]   --> src/model.rs:36:5
[INFO] [stdout]    |
[INFO] [stdout] 35 | pub struct Zoo {
[INFO] [stdout]    |            --- field in this struct
[INFO] [stdout] 36 |     animals: Vec<Animal>,
[INFO] [stdout]    |     ^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Zoo` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.43s
[INFO] running `Command { std: "docker" "inspect" "0a057ce7754165d2b6458da182cfccc337633f4680892bb96c8f70ac5dc91a6d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "0a057ce7754165d2b6458da182cfccc337633f4680892bb96c8f70ac5dc91a6d", kill_on_drop: false }`
[INFO] [stdout] 0a057ce7754165d2b6458da182cfccc337633f4680892bb96c8f70ac5dc91a6d
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+1f7f8ea0721a3b1eb73e6c6d25cccb371434b320" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] 1cfe69dc1060c30a2b6ac0e8821450e3a850b6a182b3669bd89b43a2902e377c
[INFO] running `Command { std: "docker" "start" "-a" "1cfe69dc1060c30a2b6ac0e8821450e3a850b6a182b3669bd89b43a2902e377c", kill_on_drop: false }`
[INFO] [stderr] warning: unused variable: `visitor`
[INFO] [stderr]    --> src/de.rs:391:34
[INFO] [stderr]     |
[INFO] [stderr] 391 |     fn deserialize_char<V>(self, visitor: V) -> Result<V::Value, Self::Error>
[INFO] [stderr]     |                                  ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_visitor`
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `visitor`
[INFO] [stderr]    --> src/de.rs:419:38
[INFO] [stderr]     |
[INFO] [stderr] 419 |     fn deserialize_byte_buf<V>(self, visitor: V) -> Result<V::Value, Self::Error>
[INFO] [stderr]     |                                      ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_visitor`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `visitor`
[INFO] [stderr]    --> src/de.rs:576:41
[INFO] [stderr]     |
[INFO] [stderr] 576 |     fn deserialize_ignored_any<V>(self, visitor: V) -> Result<V::Value, Self::Error>
[INFO] [stderr]     |                                         ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_visitor`
[INFO] [stderr] 
[INFO] [stderr] warning: field `0` is never read
[INFO] [stderr]  --> src/model.rs:4:17
[INFO] [stderr]   |
[INFO] [stderr] 4 | pub struct Head(u32);
[INFO] [stderr]   |            ---- ^^^
[INFO] [stderr]   |            |
[INFO] [stderr]   |            field in this struct
[INFO] [stderr]   |
[INFO] [stderr]   = help: consider removing this field
[INFO] [stderr]   = note: `Head` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stderr]   = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stderr] 
[INFO] [stderr] warning: field `0` is never read
[INFO] [stderr]  --> src/model.rs:7:17
[INFO] [stderr]   |
[INFO] [stderr] 7 | pub struct Tail(u32);
[INFO] [stderr]   |            ---- ^^^
[INFO] [stderr]   |            |
[INFO] [stderr]   |            field in this struct
[INFO] [stderr]   |
[INFO] [stderr]   = help: consider removing this field
[INFO] [stderr]   = note: `Tail` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stderr] 
[INFO] [stderr] warning: field `name` is never read
[INFO] [stderr]   --> src/model.rs:11:5
[INFO] [stderr]    |
[INFO] [stderr] 10 | pub struct Leg {
[INFO] [stderr]    |            --- field in this struct
[INFO] [stderr] 11 |     name: String,
[INFO] [stderr]    |     ^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `Leg` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stderr] 
[INFO] [stderr] warning: fields `legs` and `tail` are never read
[INFO] [stderr]   --> src/model.rs:23:16
[INFO] [stderr]    |
[INFO] [stderr] 23 |     Kangaroo { legs: [Leg; 2], tail: Tail },
[INFO] [stderr]    |     --------   ^^^^            ^^^^
[INFO] [stderr]    |     |
[INFO] [stderr]    |     fields in this variant
[INFO] [stderr]    |
[INFO] [stderr]    = note: `Animal` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stderr] 
[INFO] [stderr] warning: fields `0` and `1` are never read
[INFO] [stderr]   --> src/model.rs:28:12
[INFO] [stderr]    |
[INFO] [stderr] 28 |     Python(Head, Tail),
[INFO] [stderr]    |     ------ ^^^^  ^^^^
[INFO] [stderr]    |     |
[INFO] [stderr]    |     fields in this variant
[INFO] [stderr]    |
[INFO] [stderr]    = note: `Animal` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stderr] help: consider changing the fields to be of unit type to suppress this warning while preserving the field numbering, or remove the fields
[INFO] [stderr]    |
[INFO] [stderr] 28 -     Python(Head, Tail),
[INFO] [stderr] 28 +     Python((), ()),
[INFO] [stderr]    |
[INFO] [stderr] 
[INFO] [stderr] warning: field `animals` is never read
[INFO] [stderr]   --> src/model.rs:36:5
[INFO] [stderr]    |
[INFO] [stderr] 35 | pub struct Zoo {
[INFO] [stderr]    |            --- field in this struct
[INFO] [stderr] 36 |     animals: Vec<Animal>,
[INFO] [stderr]    |     ^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `Zoo` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stderr] 
[INFO] [stderr] warning: `zoo` (bin "zoo" test) generated 9 warnings (run `cargo fix --bin "zoo" -p zoo --tests` to apply 3 suggestions)
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.02s
[INFO] [stderr]      Running unittests src/main.rs (/opt/rustwide/target/debug/deps/zoo-1b86b58c986d0534)
[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" "1cfe69dc1060c30a2b6ac0e8821450e3a850b6a182b3669bd89b43a2902e377c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1cfe69dc1060c30a2b6ac0e8821450e3a850b6a182b3669bd89b43a2902e377c", kill_on_drop: false }`
[INFO] [stdout] 1cfe69dc1060c30a2b6ac0e8821450e3a850b6a182b3669bd89b43a2902e377c
