[INFO] fetching crate hydraulic 0.1.0...
[INFO] testing hydraulic-0.1.0 against beta-2025-09-21 for beta-1.91-3
[INFO] extracting crate hydraulic 0.1.0 into /workspace/builds/worker-6-tc2/source
[INFO] started tweaking crates.io crate hydraulic 0.1.0
[INFO] removed 0 missing examples
[INFO] finished tweaking crates.io crate hydraulic 0.1.0
[INFO] tweaked toml for crates.io crate hydraulic 0.1.0 written to /workspace/builds/worker-6-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate hydraulic 0.1.0 on toolchain beta-2025-09-21
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+beta-2025-09-21" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate crates.io crate hydraulic 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" "+beta-2025-09-21" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[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" "+beta-2025-09-21" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] eb5c3413bcb7af074c21c6da805f8d24bcfcd9181d94e8286e32de0c8424d7a2
[INFO] running `Command { std: "docker" "start" "-a" "eb5c3413bcb7af074c21c6da805f8d24bcfcd9181d94e8286e32de0c8424d7a2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "eb5c3413bcb7af074c21c6da805f8d24bcfcd9181d94e8286e32de0c8424d7a2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "eb5c3413bcb7af074c21c6da805f8d24bcfcd9181d94e8286e32de0c8424d7a2", kill_on_drop: false }`
[INFO] [stdout] eb5c3413bcb7af074c21c6da805f8d24bcfcd9181d94e8286e32de0c8424d7a2
[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=warn" "-e" "RUSTDOCFLAGS=--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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2025-09-21" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] a7bc58f4bb53ba75163f0aa5cb311d637c99257bb54ec83101ba625cdca5560c
[INFO] running `Command { std: "docker" "start" "-a" "a7bc58f4bb53ba75163f0aa5cb311d637c99257bb54ec83101ba625cdca5560c", kill_on_drop: false }`
[INFO] [stderr]    Compiling hydraulic v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused variable: `meta`
[INFO] [stdout]   --> src/features/gz.rs:16:31
[INFO] [stdout]    |
[INFO] [stdout] 16 |     fn finalise_encode(&self, meta: &AlgorithmMeta) -> Result<Vec<u8>, CompressionError> {
[INFO] [stdout]    |                               ^^^^ help: if this is intentional, prefix it with an underscore: `_meta`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `meta`
[INFO] [stdout]   --> src/features/gz.rs:20:31
[INFO] [stdout]    |
[INFO] [stdout] 20 |     fn finalise_decode(&self, meta: &AlgorithmMeta) -> Result<Vec<u8>, DecompressionError> {
[INFO] [stdout]    |                               ^^^^ help: if this is intentional, prefix it with an underscore: `_meta`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `data`
[INFO] [stdout]   --> src/features/gz.rs:26:9
[INFO] [stdout]    |
[INFO] [stdout] 26 |         data: &[u8],
[INFO] [stdout]    |         ^^^^ help: if this is intentional, prefix it with an underscore: `_data`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `meta`
[INFO] [stdout]   --> src/features/gz.rs:27:9
[INFO] [stdout]    |
[INFO] [stdout] 27 |         meta: &AlgorithmMeta,
[INFO] [stdout]    |         ^^^^ help: if this is intentional, prefix it with an underscore: `_meta`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `data`
[INFO] [stdout]   --> src/features/gz.rs:34:9
[INFO] [stdout]    |
[INFO] [stdout] 34 |         data: &[u8],
[INFO] [stdout]    |         ^^^^ help: if this is intentional, prefix it with an underscore: `_data`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `meta`
[INFO] [stdout]   --> src/features/gz.rs:35:9
[INFO] [stdout]    |
[INFO] [stdout] 35 |         meta: &AlgorithmMeta,
[INFO] [stdout]    |         ^^^^ help: if this is intentional, prefix it with an underscore: `_meta`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/read/decompress.rs:41:19
[INFO] [stdout]    |
[INFO] [stdout] 41 |     pub fn finish(mut self) -> Result<Vec<u8>, DecompressionError> {
[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: struct `Gzip` is never constructed
[INFO] [stdout]  --> src/features/gz.rs:9:12
[INFO] [stdout]   |
[INFO] [stdout] 9 | pub struct Gzip {}
[INFO] [stdout]   |            ^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function `new` is never used
[INFO] [stdout]   --> src/features/gz.rs:11:12
[INFO] [stdout]    |
[INFO] [stdout] 10 | impl Gzip {
[INFO] [stdout]    | --------- associated function in this implementation
[INFO] [stdout] 11 |     pub fn new() -> Self {
[INFO] [stdout]    |            ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Deflate` is never constructed
[INFO] [stdout]  --> src/features/deflate.rs:1:12
[INFO] [stdout]   |
[INFO] [stdout] 1 | pub struct Deflate {}
[INFO] [stdout]   |            ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.23s
[INFO] running `Command { std: "docker" "inspect" "a7bc58f4bb53ba75163f0aa5cb311d637c99257bb54ec83101ba625cdca5560c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a7bc58f4bb53ba75163f0aa5cb311d637c99257bb54ec83101ba625cdca5560c", kill_on_drop: false }`
[INFO] [stdout] a7bc58f4bb53ba75163f0aa5cb311d637c99257bb54ec83101ba625cdca5560c
[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=warn" "-e" "RUSTDOCFLAGS=--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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2025-09-21" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 983466c3287bc55e8098bc5e06c8f6f9ba31d0fe29e7ed3241f8453aa564f95e
[INFO] running `Command { std: "docker" "start" "-a" "983466c3287bc55e8098bc5e06c8f6f9ba31d0fe29e7ed3241f8453aa564f95e", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.86
[INFO] [stderr]    Compiling libc v0.2.155
[INFO] [stdout] warning: unused variable: `meta`
[INFO] [stdout]   --> src/features/gz.rs:16:31
[INFO] [stdout]    |
[INFO] [stdout] 16 |     fn finalise_encode(&self, meta: &AlgorithmMeta) -> Result<Vec<u8>, CompressionError> {
[INFO] [stdout]    |                               ^^^^ help: if this is intentional, prefix it with an underscore: `_meta`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `meta`
[INFO] [stdout]   --> src/features/gz.rs:20:31
[INFO] [stdout]    |
[INFO] [stdout] 20 |     fn finalise_decode(&self, meta: &AlgorithmMeta) -> Result<Vec<u8>, DecompressionError> {
[INFO] [stdout]    |                               ^^^^ help: if this is intentional, prefix it with an underscore: `_meta`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `data`
[INFO] [stdout]   --> src/features/gz.rs:26:9
[INFO] [stdout]    |
[INFO] [stdout] 26 |         data: &[u8],
[INFO] [stdout]    |         ^^^^ help: if this is intentional, prefix it with an underscore: `_data`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `meta`
[INFO] [stdout]   --> src/features/gz.rs:27:9
[INFO] [stdout]    |
[INFO] [stdout] 27 |         meta: &AlgorithmMeta,
[INFO] [stdout]    |         ^^^^ help: if this is intentional, prefix it with an underscore: `_meta`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `data`
[INFO] [stdout]   --> src/features/gz.rs:34:9
[INFO] [stdout]    |
[INFO] [stdout] 34 |         data: &[u8],
[INFO] [stdout]    |         ^^^^ help: if this is intentional, prefix it with an underscore: `_data`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `meta`
[INFO] [stdout]   --> src/features/gz.rs:35:9
[INFO] [stdout]    |
[INFO] [stdout] 35 |         meta: &AlgorithmMeta,
[INFO] [stdout]    |         ^^^^ help: if this is intentional, prefix it with an underscore: `_meta`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/read/decompress.rs:41:19
[INFO] [stdout]    |
[INFO] [stdout] 41 |     pub fn finish(mut self) -> Result<Vec<u8>, DecompressionError> {
[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: struct `Gzip` is never constructed
[INFO] [stdout]  --> src/features/gz.rs:9:12
[INFO] [stdout]   |
[INFO] [stdout] 9 | pub struct Gzip {}
[INFO] [stdout]   |            ^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function `new` is never used
[INFO] [stdout]   --> src/features/gz.rs:11:12
[INFO] [stdout]    |
[INFO] [stdout] 10 | impl Gzip {
[INFO] [stdout]    | --------- associated function in this implementation
[INFO] [stdout] 11 |     pub fn new() -> Self {
[INFO] [stdout]    |            ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Deflate` is never constructed
[INFO] [stdout]  --> src/features/deflate.rs:1:12
[INFO] [stdout]   |
[INFO] [stdout] 1 | pub struct Deflate {}
[INFO] [stdout]   |            ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]    Compiling quote v1.0.36
[INFO] [stderr]    Compiling syn v2.0.74
[INFO] [stderr]    Compiling getrandom v0.2.15
[INFO] [stderr]    Compiling rand_core v0.6.4
[INFO] [stderr]    Compiling zerocopy-derive v0.7.35
[INFO] [stderr]    Compiling zerocopy v0.7.35
[INFO] [stderr]    Compiling ppv-lite86 v0.2.20
[INFO] [stderr]    Compiling rand_chacha v0.3.1
[INFO] [stderr]    Compiling rand v0.8.5
[INFO] [stderr]    Compiling hydraulic v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0601]: `main` function not found in crate `gzip`
[INFO] [stdout]   --> examples/gzip.rs:38:2
[INFO] [stdout]    |
[INFO] [stdout] 38 | }
[INFO] [stdout]    |  ^ consider adding a `main` function to `examples/gzip.rs`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `meta`
[INFO] [stdout]   --> examples/gzip.rs:11:31
[INFO] [stdout]    |
[INFO] [stdout] 11 |     fn finalise_encode(&self, meta: &AlgorithmMeta) -> Result<Vec<u8>, CompressionError> {
[INFO] [stdout]    |                               ^^^^ help: if this is intentional, prefix it with an underscore: `_meta`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `meta`
[INFO] [stdout]   --> examples/gzip.rs:16:31
[INFO] [stdout]    |
[INFO] [stdout] 16 |     fn finalise_decode(&self, meta: &AlgorithmMeta) -> Result<Vec<u8>, DecompressionError> {
[INFO] [stdout]    |                               ^^^^ help: if this is intentional, prefix it with an underscore: `_meta`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `data`
[INFO] [stdout]   --> examples/gzip.rs:23:9
[INFO] [stdout]    |
[INFO] [stdout] 23 |         data: &[u8],
[INFO] [stdout]    |         ^^^^ help: if this is intentional, prefix it with an underscore: `_data`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `meta`
[INFO] [stdout]   --> examples/gzip.rs:24:9
[INFO] [stdout]    |
[INFO] [stdout] 24 |         meta: &AlgorithmMeta,
[INFO] [stdout]    |         ^^^^ help: if this is intentional, prefix it with an underscore: `_meta`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `data`
[INFO] [stdout]   --> examples/gzip.rs:32:9
[INFO] [stdout]    |
[INFO] [stdout] 32 |         data: &[u8],
[INFO] [stdout]    |         ^^^^ help: if this is intentional, prefix it with an underscore: `_data`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `meta`
[INFO] [stdout]   --> examples/gzip.rs:33:9
[INFO] [stdout]    |
[INFO] [stdout] 33 |         meta: &AlgorithmMeta,
[INFO] [stdout]    |         ^^^^ help: if this is intentional, prefix it with an underscore: `_meta`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0601`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `hydraulic` (example "gzip") due to 1 previous error; 6 warnings emitted
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stdout] warning: unused variable: `meta`
[INFO] [stdout]   --> src/features/gz.rs:16:31
[INFO] [stdout]    |
[INFO] [stdout] 16 |     fn finalise_encode(&self, meta: &AlgorithmMeta) -> Result<Vec<u8>, CompressionError> {
[INFO] [stdout]    |                               ^^^^ help: if this is intentional, prefix it with an underscore: `_meta`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `meta`
[INFO] [stdout]   --> src/features/gz.rs:20:31
[INFO] [stdout]    |
[INFO] [stdout] 20 |     fn finalise_decode(&self, meta: &AlgorithmMeta) -> Result<Vec<u8>, DecompressionError> {
[INFO] [stdout]    |                               ^^^^ help: if this is intentional, prefix it with an underscore: `_meta`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `data`
[INFO] [stdout]   --> src/features/gz.rs:26:9
[INFO] [stdout]    |
[INFO] [stdout] 26 |         data: &[u8],
[INFO] [stdout]    |         ^^^^ help: if this is intentional, prefix it with an underscore: `_data`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `meta`
[INFO] [stdout]   --> src/features/gz.rs:27:9
[INFO] [stdout]    |
[INFO] [stdout] 27 |         meta: &AlgorithmMeta,
[INFO] [stdout]    |         ^^^^ help: if this is intentional, prefix it with an underscore: `_meta`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `data`
[INFO] [stdout]   --> src/features/gz.rs:34:9
[INFO] [stdout]    |
[INFO] [stdout] 34 |         data: &[u8],
[INFO] [stdout]    |         ^^^^ help: if this is intentional, prefix it with an underscore: `_data`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `meta`
[INFO] [stdout]   --> src/features/gz.rs:35:9
[INFO] [stdout]    |
[INFO] [stdout] 35 |         meta: &AlgorithmMeta,
[INFO] [stdout]    |         ^^^^ help: if this is intentional, prefix it with an underscore: `_meta`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/read/decompress.rs:41:19
[INFO] [stdout]    |
[INFO] [stdout] 41 |     pub fn finish(mut self) -> Result<Vec<u8>, DecompressionError> {
[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] error[E0432]: unresolved import `hydraulic::Gzip`
[INFO] [stdout]   --> examples/read_read.rs:3:5
[INFO] [stdout]    |
[INFO] [stdout]  3 | use hydraulic::Gzip;
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^ no `Gzip` in the root
[INFO] [stdout]    |
[INFO] [stdout] note: found an item that was configured out
[INFO] [stdout]   --> /opt/rustwide/workdir/src/lib.rs:83:23
[INFO] [stdout]    |
[INFO] [stdout] 79 |   #[cfg(any(
[INFO] [stdout]    |  __________-
[INFO] [stdout] 80 | |     feature = "full",
[INFO] [stdout] 81 | |     feature = "gzip"
[INFO] [stdout] 82 | | ))]
[INFO] [stdout]    | |_- the item is gated here
[INFO] [stdout] 83 |   pub use features::gz::Gzip;
[INFO] [stdout]    |                         ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Deflate` is never constructed
[INFO] [stdout]  --> src/features/deflate.rs:1:12
[INFO] [stdout]   |
[INFO] [stdout] 1 | pub struct Deflate {}
[INFO] [stdout]   |            ^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0432`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `hydraulic` (example "read_read") due to 1 previous error
[INFO] running `Command { std: "docker" "inspect" "983466c3287bc55e8098bc5e06c8f6f9ba31d0fe29e7ed3241f8453aa564f95e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "983466c3287bc55e8098bc5e06c8f6f9ba31d0fe29e7ed3241f8453aa564f95e", kill_on_drop: false }`
[INFO] [stdout] 983466c3287bc55e8098bc5e06c8f6f9ba31d0fe29e7ed3241f8453aa564f95e
