[INFO] cloning repository https://github.com/LogoiLab/fuc
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/LogoiLab/fuc" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FLogoiLab%2Ffuc", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FLogoiLab%2Ffuc'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 4478463fa5dcd07ac9d14e89ebf078c6e110c1b3
[INFO] checking LogoiLab/fuc against try#0611f7de057c584b8771102fde7aed6c70c71d3b for pr-146440
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FLogoiLab%2Ffuc" "/workspace/builds/worker-5-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-5-tc2/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/LogoiLab/fuc
[INFO] finished tweaking git repo https://github.com/LogoiLab/fuc
[INFO] tweaked toml for git repo https://github.com/LogoiLab/fuc written to /workspace/builds/worker-5-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/LogoiLab/fuc on toolchain 0611f7de057c584b8771102fde7aed6c70c71d3b
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+0611f7de057c584b8771102fde7aed6c70c71d3b" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/LogoiLab/fuc 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" "+0611f7de057c584b8771102fde7aed6c70c71d3b" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-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" "+0611f7de057c584b8771102fde7aed6c70c71d3b" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 70cf2bfddc8539f6e3554497b9baed8010a8ce1a1357758d088fa1d1d3d3f479
[INFO] running `Command { std: "docker" "start" "-a" "70cf2bfddc8539f6e3554497b9baed8010a8ce1a1357758d088fa1d1d3d3f479", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "70cf2bfddc8539f6e3554497b9baed8010a8ce1a1357758d088fa1d1d3d3f479", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "70cf2bfddc8539f6e3554497b9baed8010a8ce1a1357758d088fa1d1d3d3f479", kill_on_drop: false }`
[INFO] [stdout] 70cf2bfddc8539f6e3554497b9baed8010a8ce1a1357758d088fa1d1d3d3f479
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-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" "+0611f7de057c584b8771102fde7aed6c70c71d3b" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] c4f5e9fff9ff744f3b5e815d08c396041439e0e0b266ee1d1ab8a2152818181a
[INFO] running `Command { std: "docker" "start" "-a" "c4f5e9fff9ff744f3b5e815d08c396041439e0e0b266ee1d1ab8a2152818181a", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.48
[INFO] [stderr]    Compiling cc v1.0.29
[INFO] [stderr]    Compiling proc-macro2 v0.4.27
[INFO] [stderr]    Compiling autocfg v0.1.2
[INFO] [stderr]    Compiling serde v1.0.87
[INFO] [stderr]    Compiling ryu v0.2.7
[INFO] [stderr]    Compiling rustc-demangle v0.1.13
[INFO] [stderr]    Compiling cfg-if v0.1.6
[INFO] [stderr]    Compiling itoa v0.4.3
[INFO] [stderr]    Compiling pulldown-cmark v0.2.0
[INFO] [stderr]    Compiling same-file v1.0.4
[INFO] [stderr]    Compiling bitflags v1.0.4
[INFO] [stderr]    Compiling bytecount v0.4.0
[INFO] [stderr]    Compiling glob v0.2.11
[INFO] [stderr]    Compiling walkdir v2.2.7
[INFO] [stderr]    Compiling backtrace v0.3.13
[INFO] [stderr]    Compiling rand v0.4.6
[INFO] [stderr]    Compiling backtrace-sys v0.1.28
[INFO] [stderr]    Compiling lz4-sys v1.8.3
[INFO] [stderr]    Compiling quote v0.6.11
[INFO] [stderr]    Compiling syn v0.15.26
[INFO] [stderr]    Compiling tempdir v0.3.7
[INFO] [stderr]    Compiling error-chain v0.12.0
[INFO] [stderr]    Compiling serde_derive v1.0.87
[INFO] [stderr]    Compiling semver v0.9.0
[INFO] [stderr]    Compiling serde_json v1.0.38
[INFO] [stderr]    Compiling cargo_metadata v0.6.4
[INFO] [stderr]    Compiling skeptic v0.13.4
[INFO] [stderr]    Compiling lz4 v1.23.1
[INFO] [stderr]     Checking fuc v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `fuc::block::Block`
[INFO] [stdout]  --> src/main.rs:5:5
[INFO] [stdout]   |
[INFO] [stdout] 5 | use fuc::block::Block;
[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 import: `fuc::block::Block`
[INFO] [stdout]  --> src/main.rs:5:5
[INFO] [stdout]   |
[INFO] [stdout] 5 | use fuc::block::Block;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unreachable statement
[INFO] [stdout]   --> src/fuc/block.rs:49:9
[INFO] [stdout]    |
[INFO] [stdout] 48 |         unimplemented!();
[INFO] [stdout]    |         ---------------- any code following this expression is unreachable
[INFO] [stdout] 49 |         self.dirty = false;
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^^^ unreachable statement
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unreachable_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unreachable statement
[INFO] [stdout]   --> src/fuc/descriptor.rs:61:9
[INFO] [stdout]    |
[INFO] [stdout] 60 |         unimplemented!();
[INFO] [stdout]    |         ---------------- any code following this expression is unreachable
[INFO] [stdout] 61 |         self.dirty = false;
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^^^ unreachable statement
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unreachable statement
[INFO] [stdout]   --> src/fuc/fat.rs:28:9
[INFO] [stdout]    |
[INFO] [stdout] 27 |         unimplemented!();
[INFO] [stdout]    |         ---------------- any code following this expression is unreachable
[INFO] [stdout] 28 |         self.dirty = false;
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^^^ unreachable statement
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unreachable statement
[INFO] [stdout]   --> src/fuc/file.rs:14:9
[INFO] [stdout]    |
[INFO] [stdout] 13 |         unimplemented!();
[INFO] [stdout]    |         ---------------- any code following this expression is unreachable
[INFO] [stdout] 14 |         self.dirty = false;
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^^^ unreachable statement
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unreachable statement
[INFO] [stdout]   --> src/fuc/volume.rs:19:9
[INFO] [stdout]    |
[INFO] [stdout] 18 |         unimplemented!();
[INFO] [stdout]    |         ---------------- any code following this expression is unreachable
[INFO] [stdout] 19 |         self.dirty = false;
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^^^ unreachable statement
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `writer`
[INFO] [stdout]   --> src/fuc/block.rs:47:29
[INFO] [stdout]    |
[INFO] [stdout] 47 |     pub fn write(&mut self, writer: Writer) -> Writer {
[INFO] [stdout]    |                             ^^^^^^ help: if this is intentional, prefix it with an underscore: `_writer`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `writer`
[INFO] [stdout]   --> src/fuc/descriptor.rs:59:29
[INFO] [stdout]    |
[INFO] [stdout] 59 |     pub fn write(&mut self, writer: Writer) -> Writer {
[INFO] [stdout]    |                             ^^^^^^ help: if this is intentional, prefix it with an underscore: `_writer`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unreachable statement
[INFO] [stdout]   --> src/fuc/block.rs:49:9
[INFO] [stdout]    |
[INFO] [stdout] 48 |         unimplemented!();
[INFO] [stdout]    |         ---------------- any code following this expression is unreachable
[INFO] [stdout] 49 |         self.dirty = false;
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^^^ unreachable statement
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unreachable_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unreachable statement
[INFO] [stdout]   --> src/fuc/descriptor.rs:61:9
[INFO] [stdout]    |
[INFO] [stdout] 60 |         unimplemented!();
[INFO] [stdout]    |         ---------------- any code following this expression is unreachable
[INFO] [stdout] 61 |         self.dirty = false;
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^^^ unreachable statement
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unreachable statement
[INFO] [stdout]   --> src/fuc/fat.rs:28:9
[INFO] [stdout]    |
[INFO] [stdout] 27 |         unimplemented!();
[INFO] [stdout]    |         ---------------- any code following this expression is unreachable
[INFO] [stdout] 28 |         self.dirty = false;
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^^^ unreachable statement
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unreachable statement
[INFO] [stdout]   --> src/fuc/file.rs:14:9
[INFO] [stdout]    |
[INFO] [stdout] 13 |         unimplemented!();
[INFO] [stdout]    |         ---------------- any code following this expression is unreachable
[INFO] [stdout] 14 |         self.dirty = false;
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^^^ unreachable statement
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unreachable statement
[INFO] [stdout]   --> src/fuc/volume.rs:19:9
[INFO] [stdout]    |
[INFO] [stdout] 18 |         unimplemented!();
[INFO] [stdout]    |         ---------------- any code following this expression is unreachable
[INFO] [stdout] 19 |         self.dirty = false;
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^^^ unreachable statement
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `writer`
[INFO] [stdout]   --> src/fuc/block.rs:47:29
[INFO] [stdout]    |
[INFO] [stdout] 47 |     pub fn write(&mut self, writer: Writer) -> Writer {
[INFO] [stdout]    |                             ^^^^^^ help: if this is intentional, prefix it with an underscore: `_writer`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `writer`
[INFO] [stdout]   --> src/fuc/descriptor.rs:59:29
[INFO] [stdout]    |
[INFO] [stdout] 59 |     pub fn write(&mut self, writer: Writer) -> Writer {
[INFO] [stdout]    |                             ^^^^^^ help: if this is intentional, prefix it with an underscore: `_writer`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `writer`
[INFO] [stdout]   --> src/fuc/fat.rs:26:29
[INFO] [stdout]    |
[INFO] [stdout] 26 |     pub fn write(&mut self, writer: Writer) -> Writer {
[INFO] [stdout]    |                             ^^^^^^ help: if this is intentional, prefix it with an underscore: `_writer`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `writer`
[INFO] [stdout]   --> src/fuc/file.rs:12:29
[INFO] [stdout]    |
[INFO] [stdout] 12 |     pub fn write(&mut self, writer: Writer) -> Writer {
[INFO] [stdout]    |                             ^^^^^^ help: if this is intentional, prefix it with an underscore: `_writer`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `writer`
[INFO] [stdout]   --> src/fuc/volume.rs:17:29
[INFO] [stdout]    |
[INFO] [stdout] 17 |     pub fn write(&mut self, writer: Writer) -> Writer {
[INFO] [stdout]    |                             ^^^^^^ help: if this is intentional, prefix it with an underscore: `_writer`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `offset` is never read
[INFO] [stdout]   --> src/fuc/block.rs:10:5
[INFO] [stdout]    |
[INFO] [stdout]  7 | pub struct Block {
[INFO] [stdout]    |            ----- field in this struct
[INFO] [stdout] ...
[INFO] [stdout] 10 |     offset: usize,
[INFO] [stdout]    |     ^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `block_id` is never read
[INFO] [stdout]  --> src/fuc/descriptor.rs:7:5
[INFO] [stdout]   |
[INFO] [stdout] 6 | pub struct FileDescriptor {
[INFO] [stdout]   |            -------------- field in this struct
[INFO] [stdout] 7 |     block_id: [u8; 2],
[INFO] [stdout]   |     ^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `FileDescriptor` has a derived impl for the trait `Clone`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: struct `Reader` is never constructed
[INFO] [stdout]   --> src/fuc/driver.rs:39:12
[INFO] [stdout]    |
[INFO] [stdout] 39 | pub struct Reader {
[INFO] [stdout]    |            ^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this `pub` struct has private fields, no public constructor, and is not otherwise reachable through the external API, so consider providing a public constructor or removing it
[INFO] [stdout]    = note: `#[deny(unused_unconstructable_pub_struct)]` (part of `#[deny(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `fdesc` is never read
[INFO] [stdout]  --> src/fuc/fat.rs:8:5
[INFO] [stdout]   |
[INFO] [stdout] 7 | pub struct FileAllocationTable {
[INFO] [stdout]   |            ------------------- field in this struct
[INFO] [stdout] 8 |     fdesc: Vec<FileDescriptor>,
[INFO] [stdout]   |     ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: struct `File` is never constructed
[INFO] [stdout]  --> src/fuc/file.rs:5:12
[INFO] [stdout]   |
[INFO] [stdout] 5 | pub struct File {
[INFO] [stdout]   |            ^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: this `pub` struct has private fields, no public constructor, and is not otherwise reachable through the external API, so consider providing a public constructor or removing it
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `desc` and `blocks` are never read
[INFO] [stdout]  --> src/fuc/file.rs:6:5
[INFO] [stdout]   |
[INFO] [stdout] 5 | pub struct File {
[INFO] [stdout]   |            ---- fields in this struct
[INFO] [stdout] 6 |     desc: FileDescriptor,
[INFO] [stdout]   |     ^^^^
[INFO] [stdout] 7 |     blocks: Vec<Block>,
[INFO] [stdout]   |     ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: struct `Volume` is never constructed
[INFO] [stdout]  --> src/fuc/volume.rs:9:12
[INFO] [stdout]   |
[INFO] [stdout] 9 | pub struct Volume {
[INFO] [stdout]   |            ^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: this `pub` struct has private fields, no public constructor, and is not otherwise reachable through the external API, so consider providing a public constructor or removing it
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `magic`, `fat`, and `files` are never read
[INFO] [stdout]   --> src/fuc/volume.rs:10:5
[INFO] [stdout]    |
[INFO] [stdout]  9 | pub struct Volume {
[INFO] [stdout]    |            ------ fields in this struct
[INFO] [stdout] 10 |     magic: [u8; MAGIC_LENGTH],
[INFO] [stdout]    |     ^^^^^
[INFO] [stdout] 11 |     fat: FileAllocationTable,
[INFO] [stdout]    |     ^^^
[INFO] [stdout] 12 |     files: Vec<File>,
[INFO] [stdout]    |     ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `fuc` (bin "fuc" test) due to 3 previous errors; 16 warnings emitted
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stdout] warning: unused variable: `writer`
[INFO] [stdout]   --> src/fuc/fat.rs:26:29
[INFO] [stdout]    |
[INFO] [stdout] 26 |     pub fn write(&mut self, writer: Writer) -> Writer {
[INFO] [stdout]    |                             ^^^^^^ help: if this is intentional, prefix it with an underscore: `_writer`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `writer`
[INFO] [stdout]   --> src/fuc/file.rs:12:29
[INFO] [stdout]    |
[INFO] [stdout] 12 |     pub fn write(&mut self, writer: Writer) -> Writer {
[INFO] [stdout]    |                             ^^^^^^ help: if this is intentional, prefix it with an underscore: `_writer`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `writer`
[INFO] [stdout]   --> src/fuc/volume.rs:17:29
[INFO] [stdout]    |
[INFO] [stdout] 17 |     pub fn write(&mut self, writer: Writer) -> Writer {
[INFO] [stdout]    |                             ^^^^^^ help: if this is intentional, prefix it with an underscore: `_writer`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `offset` is never read
[INFO] [stdout]   --> src/fuc/block.rs:10:5
[INFO] [stdout]    |
[INFO] [stdout]  7 | pub struct Block {
[INFO] [stdout]    |            ----- field in this struct
[INFO] [stdout] ...
[INFO] [stdout] 10 |     offset: usize,
[INFO] [stdout]    |     ^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `block_id` is never read
[INFO] [stdout]  --> src/fuc/descriptor.rs:7:5
[INFO] [stdout]   |
[INFO] [stdout] 6 | pub struct FileDescriptor {
[INFO] [stdout]   |            -------------- field in this struct
[INFO] [stdout] 7 |     block_id: [u8; 2],
[INFO] [stdout]   |     ^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `FileDescriptor` has a derived impl for the trait `Clone`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: struct `Reader` is never constructed
[INFO] [stdout]   --> src/fuc/driver.rs:39:12
[INFO] [stdout]    |
[INFO] [stdout] 39 | pub struct Reader {
[INFO] [stdout]    |            ^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this `pub` struct has private fields, no public constructor, and is not otherwise reachable through the external API, so consider providing a public constructor or removing it
[INFO] [stdout]    = note: `#[deny(unused_unconstructable_pub_struct)]` (part of `#[deny(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `fdesc` is never read
[INFO] [stdout]  --> src/fuc/fat.rs:8:5
[INFO] [stdout]   |
[INFO] [stdout] 7 | pub struct FileAllocationTable {
[INFO] [stdout]   |            ------------------- field in this struct
[INFO] [stdout] 8 |     fdesc: Vec<FileDescriptor>,
[INFO] [stdout]   |     ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: struct `File` is never constructed
[INFO] [stdout]  --> src/fuc/file.rs:5:12
[INFO] [stdout]   |
[INFO] [stdout] 5 | pub struct File {
[INFO] [stdout]   |            ^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: this `pub` struct has private fields, no public constructor, and is not otherwise reachable through the external API, so consider providing a public constructor or removing it
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `desc` and `blocks` are never read
[INFO] [stdout]  --> src/fuc/file.rs:6:5
[INFO] [stdout]   |
[INFO] [stdout] 5 | pub struct File {
[INFO] [stdout]   |            ---- fields in this struct
[INFO] [stdout] 6 |     desc: FileDescriptor,
[INFO] [stdout]   |     ^^^^
[INFO] [stdout] 7 |     blocks: Vec<Block>,
[INFO] [stdout]   |     ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: struct `Volume` is never constructed
[INFO] [stdout]  --> src/fuc/volume.rs:9:12
[INFO] [stdout]   |
[INFO] [stdout] 9 | pub struct Volume {
[INFO] [stdout]   |            ^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: this `pub` struct has private fields, no public constructor, and is not otherwise reachable through the external API, so consider providing a public constructor or removing it
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `magic`, `fat`, and `files` are never read
[INFO] [stdout]   --> src/fuc/volume.rs:10:5
[INFO] [stdout]    |
[INFO] [stdout]  9 | pub struct Volume {
[INFO] [stdout]    |            ------ fields in this struct
[INFO] [stdout] 10 |     magic: [u8; MAGIC_LENGTH],
[INFO] [stdout]    |     ^^^^^
[INFO] [stdout] 11 |     fat: FileAllocationTable,
[INFO] [stdout]    |     ^^^
[INFO] [stdout] 12 |     files: Vec<File>,
[INFO] [stdout]    |     ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `fuc` (bin "fuc") due to 3 previous errors; 16 warnings emitted
[INFO] running `Command { std: "docker" "inspect" "c4f5e9fff9ff744f3b5e815d08c396041439e0e0b266ee1d1ab8a2152818181a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c4f5e9fff9ff744f3b5e815d08c396041439e0e0b266ee1d1ab8a2152818181a", kill_on_drop: false }`
[INFO] [stdout] c4f5e9fff9ff744f3b5e815d08c396041439e0e0b266ee1d1ab8a2152818181a
