[INFO] updating cached repository dante-signal31/steganer [INFO] running `"git" "fetch" "--all"` [INFO] [stdout] Fetching origin [INFO] [stderr] From git://github.com/dante-signal31/steganer [INFO] [stderr] * branch HEAD -> FETCH_HEAD [INFO] running `"git" "clone" "work/cache/sources/gh/dante-signal31/steganer" "work/ex/pr-60444/sources/master#92b5e20ad59b183a2e6cd79423f54b8aa7ac9cbf/gh/dante-signal31/steganer"` [INFO] [stderr] Cloning into 'work/ex/pr-60444/sources/master#92b5e20ad59b183a2e6cd79423f54b8aa7ac9cbf/gh/dante-signal31/steganer'... [INFO] [stderr] done. [INFO] running `"git" "clone" "work/cache/sources/gh/dante-signal31/steganer" "work/ex/pr-60444/sources/try#cf8e5a06b289fbcdaf75ca55c057b2cb09fff33b/gh/dante-signal31/steganer"` [INFO] [stderr] Cloning into 'work/ex/pr-60444/sources/try#cf8e5a06b289fbcdaf75ca55c057b2cb09fff33b/gh/dante-signal31/steganer'... [INFO] [stderr] done. [INFO] running `"git" "rev-parse" "HEAD"` [INFO] [stdout] 155076423e43ab58339026859dd7d4517516eb76 [INFO] sha for GitHub repo dante-signal31/steganer: 155076423e43ab58339026859dd7d4517516eb76 [INFO] validating manifest of dante-signal31/steganer on toolchain master#92b5e20ad59b183a2e6cd79423f54b8aa7ac9cbf [INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+92b5e20ad59b183a2e6cd79423f54b8aa7ac9cbf-alt" "read-manifest" "--manifest-path" "Cargo.toml"` [INFO] validating manifest of dante-signal31/steganer on toolchain try#cf8e5a06b289fbcdaf75ca55c057b2cb09fff33b [INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+cf8e5a06b289fbcdaf75ca55c057b2cb09fff33b-alt" "read-manifest" "--manifest-path" "Cargo.toml"` [INFO] started frobbing dante-signal31/steganer [INFO] finished frobbing dante-signal31/steganer [INFO] frobbed toml for dante-signal31/steganer written to work/ex/pr-60444/sources/master#92b5e20ad59b183a2e6cd79423f54b8aa7ac9cbf/gh/dante-signal31/steganer/Cargo.toml [INFO] started frobbing dante-signal31/steganer [INFO] finished frobbing dante-signal31/steganer [INFO] frobbed toml for dante-signal31/steganer written to work/ex/pr-60444/sources/try#cf8e5a06b289fbcdaf75ca55c057b2cb09fff33b/gh/dante-signal31/steganer/Cargo.toml [INFO] crate dante-signal31/steganer already has a lockfile, it will not be regenerated [INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+92b5e20ad59b183a2e6cd79423f54b8aa7ac9cbf-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"` [INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+cf8e5a06b289fbcdaf75ca55c057b2cb09fff33b-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"` [INFO] checking dante-signal31/steganer against master#92b5e20ad59b183a2e6cd79423f54b8aa7ac9cbf for pr-60444 [INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-60444/worker-6/master#92b5e20ad59b183a2e6cd79423f54b8aa7ac9cbf:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-60444/sources/master#92b5e20ad59b183a2e6cd79423f54b8aa7ac9cbf/gh/dante-signal31/steganer:/opt/crater/workdir:ro,Z" "-v" "/mnt/big/crater/work/local/cargo-home:/opt/crater/cargo-home:ro,Z" "-v" "/mnt/big/crater/work/local/rustup-home:/opt/crater/rustup-home:ro,Z" "-e" "USER_ID=1000" "-e" "SOURCE_DIR=/opt/crater/workdir" "-e" "MAP_USER_ID=1000" "-e" "CARGO_TARGET_DIR=/opt/crater/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/crater/cargo-home" "-e" "RUSTUP_HOME=/opt/crater/rustup-home" "-w" "/opt/crater/workdir" "-m" "1536M" "--network" "none" "rustops/crates-build-env" "/opt/crater/cargo-home/bin/cargo" "+92b5e20ad59b183a2e6cd79423f54b8aa7ac9cbf-alt" "check" "--frozen" "--all" "--all-targets"` [INFO] [stdout] a51f651bdfbb04143d901a9d1c825c20ad96332aaffcc12b8c8f2cd55ec72f42 [INFO] running `"docker" "start" "-a" "a51f651bdfbb04143d901a9d1c825c20ad96332aaffcc12b8c8f2cd55ec72f42"` [INFO] [stderr] Checking ring v0.14.6 [INFO] [stderr] Checking tempfile v3.0.6 [INFO] [stderr] Checking image v0.21.1 [INFO] [stderr] Checking steganer v0.1.0 (/opt/crater/workdir) [INFO] [stderr] warning: unused import: `Write` [INFO] [stderr] --> src/fileio.rs:19:32 [INFO] [stderr] | [INFO] [stderr] 19 | use std::io::{BufReader, Read, Write, Error}; [INFO] [stderr] | ^^^^^ [INFO] [stderr] | [INFO] [stderr] = note: #[warn(unused_imports)] on by default [INFO] [stderr] [INFO] [stderr] warning: unused import: `image::open` [INFO] [stderr] --> src/fileio.rs:25:5 [INFO] [stderr] | [INFO] [stderr] 25 | use image::open; [INFO] [stderr] | ^^^^^^^^^^^ [INFO] [stderr] [INFO] [stderr] warning: unused import: `ImageDecoder` [INFO] [stderr] --> src/stegimage.rs:269:48 [INFO] [stderr] | [INFO] [stderr] 269 | use image::{ImageBuffer, GenericImageView, ImageDecoder}; [INFO] [stderr] | ^^^^^^^^^^^^ [INFO] [stderr] [INFO] [stderr] warning: unused import: `std::mem::size_of_val` [INFO] [stderr] --> src/stegimage.rs:272:9 [INFO] [stderr] | [INFO] [stderr] 272 | use std::mem::size_of_val; [INFO] [stderr] | ^^^^^^^^^^^^^^^^^^^^^ [INFO] [stderr] [INFO] [stderr] warning: unused import: `Write` [INFO] [stderr] --> src/fileio.rs:19:32 [INFO] [stderr] | [INFO] [stderr] 19 | use std::io::{BufReader, Read, Write, Error}; [INFO] [stderr] | ^^^^^ [INFO] [stderr] | [INFO] [stderr] = note: #[warn(unused_imports)] on by default [INFO] [stderr] [INFO] [stderr] warning: unused import: `std::path::PathBuf` [INFO] [stderr] --> src/fileio.rs:24:5 [INFO] [stderr] | [INFO] [stderr] 24 | use std::path::PathBuf; [INFO] [stderr] | ^^^^^^^^^^^^^^^^^^ [INFO] [stderr] [INFO] [stderr] warning: unused import: `image::open` [INFO] [stderr] --> src/fileio.rs:25:5 [INFO] [stderr] | [INFO] [stderr] 25 | use image::open; [INFO] [stderr] | ^^^^^^^^^^^ [INFO] [stderr] [INFO] [stderr] warning: unused variable: `file_to_hide` [INFO] [stderr] --> src/lib.rs:39:9 [INFO] [stderr] | [INFO] [stderr] 39 | let file_to_hide = File::open(hidden_file) [INFO] [stderr] | ^^^^^^^^^^^^ help: consider prefixing with an underscore: `_file_to_hide` [INFO] [stderr] | [INFO] [stderr] = note: #[warn(unused_variables)] on by default [INFO] [stderr] [INFO] [stderr] warning: unused variable: `host_file` [INFO] [stderr] --> src/lib.rs:38:38 [INFO] [stderr] | [INFO] [stderr] 38 | pub fn extract(hidden_file: &String, host_file: &String)-> Result<(), Box>{ [INFO] [stderr] | ^^^^^^^^^ help: consider prefixing with an underscore: `_host_file` [INFO] [stderr] [INFO] [stderr] warning: unused variable: `hidden_file` [INFO] [stderr] --> src/lib.rs:51:13 [INFO] [stderr] | [INFO] [stderr] 51 | pub fn hide(hidden_file: &String, host_file: &String)-> Result<(), Box>{ [INFO] [stderr] | ^^^^^^^^^^^ help: consider prefixing with an underscore: `_hidden_file` [INFO] [stderr] [INFO] [stderr] warning: unused variable: `host_file` [INFO] [stderr] --> src/lib.rs:51:35 [INFO] [stderr] | [INFO] [stderr] 51 | pub fn hide(hidden_file: &String, host_file: &String)-> Result<(), Box>{ [INFO] [stderr] | ^^^^^^^^^ help: consider prefixing with an underscore: `_host_file` [INFO] [stderr] [INFO] [stderr] warning: unused variable: `chunk` [INFO] [stderr] --> src/fileio.rs:152:29 [INFO] [stderr] | [INFO] [stderr] 152 | pub fn write(&mut self, chunk: Chunk){ [INFO] [stderr] | ^^^^^ help: consider prefixing with an underscore: `_chunk` [INFO] [stderr] [INFO] [stderr] warning: unused variable: `test_env` [INFO] [stderr] --> src/fileio.rs:261:27 [INFO] [stderr] | [INFO] [stderr] 261 | let ( source_path,test_env) = get_temporary_test_file(); [INFO] [stderr] | ^^^^^^^^ help: consider prefixing with an underscore: `_test_env` [INFO] [stderr] [INFO] [stderr] warning: unused variable: `test_env` [INFO] [stderr] --> src/fileio.rs:286:27 [INFO] [stderr] | [INFO] [stderr] 286 | let ( source_path,test_env) = get_temporary_test_file(); [INFO] [stderr] | ^^^^^^^^ help: consider prefixing with an underscore: `_test_env` [INFO] [stderr] [INFO] [stderr] warning: unused variable: `test_env` [INFO] [stderr] --> src/fileio.rs:340:27 [INFO] [stderr] | [INFO] [stderr] 340 | let ( source_path,test_env) = get_temporary_test_file(); [INFO] [stderr] | ^^^^^^^^ help: consider prefixing with an underscore: `_test_env` [INFO] [stderr] [INFO] [stderr] warning: unused variable: `test_env` [INFO] [stderr] --> src/stegimage.rs:305:14 [INFO] [stderr] | [INFO] [stderr] 305 | let (test_env, test_image_path) = create_test_image(TestColors::BLACK); [INFO] [stderr] | ^^^^^^^^ help: consider prefixing with an underscore: `_test_env` [INFO] [stderr] [INFO] [stderr] warning: unused variable: `test_env` [INFO] [stderr] --> src/stegimage.rs:321:14 [INFO] [stderr] | [INFO] [stderr] 321 | let (test_env, test_image_path) = create_test_image(TestColors::BLACK); [INFO] [stderr] | ^^^^^^^^ help: consider prefixing with an underscore: `_test_env` [INFO] [stderr] [INFO] [stderr] warning: unused variable: `test_env` [INFO] [stderr] --> src/stegimage.rs:340:14 [INFO] [stderr] | [INFO] [stderr] 340 | let (test_env, test_image_path) = create_test_image(TestColors::BLACK); [INFO] [stderr] | ^^^^^^^^ help: consider prefixing with an underscore: `_test_env` [INFO] [stderr] [INFO] [stderr] warning: unused variable: `test_env` [INFO] [stderr] --> src/stegimage.rs:365:14 [INFO] [stderr] | [INFO] [stderr] 365 | let (test_env, test_image_path) = create_test_image(TestColors::BLACK); [INFO] [stderr] | ^^^^^^^^ help: consider prefixing with an underscore: `_test_env` [INFO] [stderr] [INFO] [stderr] warning: unused variable: `test_env` [INFO] [stderr] --> src/stegimage.rs:384:14 [INFO] [stderr] | [INFO] [stderr] 384 | let (test_env, test_image_path) = create_test_image(TestColors::BLACK); [INFO] [stderr] | ^^^^^^^^ help: consider prefixing with an underscore: `_test_env` [INFO] [stderr] [INFO] [stderr] warning: value assigned to `pixel` is never read [INFO] [stderr] --> src/stegimage.rs:388:17 [INFO] [stderr] | [INFO] [stderr] 388 | let mut pixel = container.get_image().get_pixel(0,0); [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: `test_env` [INFO] [stderr] --> src/stegimage.rs:408:14 [INFO] [stderr] | [INFO] [stderr] 408 | let (test_env, test_image_path) = create_test_image(TestColors::BLACK); [INFO] [stderr] | ^^^^^^^^ help: consider prefixing with an underscore: `_test_env` [INFO] [stderr] [INFO] [stderr] warning: value assigned to `pixel` is never read [INFO] [stderr] --> src/stegimage.rs:412:17 [INFO] [stderr] | [INFO] [stderr] 412 | let mut pixel = container.get_image().get_pixel(0,0); [INFO] [stderr] | ^^^^^ [INFO] [stderr] | [INFO] [stderr] = help: maybe it is overwritten before being read? [INFO] [stderr] [INFO] [stderr] warning: unused variable: `test_env` [INFO] [stderr] --> src/stegimage.rs:430:14 [INFO] [stderr] | [INFO] [stderr] 430 | let (test_env, test_image_path) = create_test_image(TestColors::WHITE); [INFO] [stderr] | ^^^^^^^^ help: consider prefixing with an underscore: `_test_env` [INFO] [stderr] [INFO] [stderr] warning: unused variable: `test_env` [INFO] [stderr] --> src/stegimage.rs:450:14 [INFO] [stderr] | [INFO] [stderr] 450 | let (test_env, test_image_path) = create_test_image(TestColors::WHITE); [INFO] [stderr] | ^^^^^^^^ help: consider prefixing with an underscore: `_test_env` [INFO] [stderr] [INFO] [stderr] warning: value assigned to `pixel` is never read [INFO] [stderr] --> src/stegimage.rs:454:17 [INFO] [stderr] | [INFO] [stderr] 454 | let mut pixel = container.get_image().get_pixel(0,0); [INFO] [stderr] | ^^^^^ [INFO] [stderr] | [INFO] [stderr] = help: maybe it is overwritten before being read? [INFO] [stderr] [INFO] [stderr] warning: unused variable: `test_env` [INFO] [stderr] --> src/stegimage.rs:475:14 [INFO] [stderr] | [INFO] [stderr] 475 | let (test_env, test_image_path) = create_test_image(TestColors::WHITE); [INFO] [stderr] | ^^^^^^^^ help: consider prefixing with an underscore: `_test_env` [INFO] [stderr] [INFO] [stderr] warning: value assigned to `pixel` is never read [INFO] [stderr] --> src/stegimage.rs:478:17 [INFO] [stderr] | [INFO] [stderr] 478 | let mut pixel = container.get_image().get_pixel(0,0); [INFO] [stderr] | ^^^^^ [INFO] [stderr] | [INFO] [stderr] = help: maybe it is overwritten before being read? [INFO] [stderr] [INFO] [stderr] warning: unused variable: `test_env` [INFO] [stderr] --> src/stegimage.rs:496:14 [INFO] [stderr] | [INFO] [stderr] 496 | let (test_env, test_image_path) = create_test_image_with_custom_color(test_bits); [INFO] [stderr] | ^^^^^^^^ help: consider prefixing with an underscore: `_test_env` [INFO] [stderr] [INFO] [stderr] warning: unused variable: `test_env` [INFO] [stderr] --> src/stegimage.rs:514:14 [INFO] [stderr] | [INFO] [stderr] 514 | let (test_env, test_image_path) = create_test_image_with_custom_color(test_bits); [INFO] [stderr] | ^^^^^^^^ help: consider prefixing with an underscore: `_test_env` [INFO] [stderr] [INFO] [stderr] warning: unused variable: `test_env` [INFO] [stderr] --> src/stegimage.rs:537:14 [INFO] [stderr] | [INFO] [stderr] 537 | let (test_env, test_image_path) = create_test_image_with_custom_color(test_bits); [INFO] [stderr] | ^^^^^^^^ help: consider prefixing with an underscore: `_test_env` [INFO] [stderr] [INFO] [stderr] warning: unused variable: `test_env` [INFO] [stderr] --> src/stegimage.rs:563:14 [INFO] [stderr] | [INFO] [stderr] 563 | let (test_env, test_image_path) = create_test_image(TestColors::BLACK); [INFO] [stderr] | ^^^^^^^^ help: consider prefixing with an underscore: `_test_env` [INFO] [stderr] [INFO] [stderr] warning: unused variable: `test_env` [INFO] [stderr] --> src/stegimage.rs:588:14 [INFO] [stderr] | [INFO] [stderr] 588 | let (test_env, test_image_path) = create_test_image(TestColors::BLACK); [INFO] [stderr] | ^^^^^^^^ help: consider prefixing with an underscore: `_test_env` [INFO] [stderr] [INFO] [stderr] warning: unused variable: `test_env` [INFO] [stderr] --> src/stegimage.rs:610:14 [INFO] [stderr] | [INFO] [stderr] 610 | let (test_env, test_image_path) = create_test_image(TestColors::BLACK); [INFO] [stderr] | ^^^^^^^^ help: consider prefixing with an underscore: `_test_env` [INFO] [stderr] [INFO] [stderr] warning: unused variable: `test_env` [INFO] [stderr] --> src/stegimage.rs:640:14 [INFO] [stderr] | [INFO] [stderr] 640 | let (test_env, test_image_path) = create_test_image(TestColors::BLACK); [INFO] [stderr] | ^^^^^^^^ help: consider prefixing with an underscore: `_test_env` [INFO] [stderr] [INFO] [stderr] warning: variable does not need to be mutable [INFO] [stderr] --> src/fileio.rs:344:13 [INFO] [stderr] | [INFO] [stderr] 344 | let mut reader = ContentReader::new(&file_content, 4) [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] error[E0716]: temporary value dropped while borrowed [INFO] [stderr] --> src/fileio.rs:347:42 [INFO] [stderr] | [INFO] [stderr] 347 | let destination_file_name_path = source_path.join("output.txt").to_str() [INFO] [stderr] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ creates a temporary which is freed while still in use [INFO] [stderr] 348 | .expect("Error reading destination file name. Unsupported character might have been used."); [INFO] [stderr] | - temporary value is freed at the end of this statement [INFO] [stderr] 349 | { [INFO] [stderr] 350 | let mut destination_writer = FileWriter::new(destination_file_name_path) [INFO] [stderr] | -------------------------- borrow later used here [INFO] [stderr] | [INFO] [stderr] = note: consider using a `let` binding to create a longer lived value [INFO] [stderr] [INFO] [stderr] warning: variable does not need to be mutable [INFO] [stderr] --> src/stegimage.rs:306:13 [INFO] [stderr] | [INFO] [stderr] 306 | let mut container = ContainerImage::new(test_image_path.to_str() [INFO] [stderr] | ----^^^^^^^^^ [INFO] [stderr] | | [INFO] [stderr] | help: remove this `mut` [INFO] [stderr] [INFO] [stderr] warning: unused variable: `file_to_hide` [INFO] [stderr] --> src/lib.rs:39:9 [INFO] [stderr] | [INFO] [stderr] 39 | let file_to_hide = File::open(hidden_file) [INFO] [stderr] | ^^^^^^^^^^^^ help: consider prefixing with an underscore: `_file_to_hide` [INFO] [stderr] | [INFO] [stderr] = note: #[warn(unused_variables)] on by default [INFO] [stderr] [INFO] [stderr] warning: unused variable: `host_file` [INFO] [stderr] --> src/lib.rs:38:38 [INFO] [stderr] | [INFO] [stderr] 38 | pub fn extract(hidden_file: &String, host_file: &String)-> Result<(), Box>{ [INFO] [stderr] | ^^^^^^^^^ help: consider prefixing with an underscore: `_host_file` [INFO] [stderr] [INFO] [stderr] warning: unused variable: `hidden_file` [INFO] [stderr] --> src/lib.rs:51:13 [INFO] [stderr] | [INFO] [stderr] 51 | pub fn hide(hidden_file: &String, host_file: &String)-> Result<(), Box>{ [INFO] [stderr] | ^^^^^^^^^^^ help: consider prefixing with an underscore: `_hidden_file` [INFO] [stderr] [INFO] [stderr] warning: unused variable: `host_file` [INFO] [stderr] --> src/lib.rs:51:35 [INFO] [stderr] | [INFO] [stderr] 51 | pub fn hide(hidden_file: &String, host_file: &String)-> Result<(), Box>{ [INFO] [stderr] | ^^^^^^^^^ help: consider prefixing with an underscore: `_host_file` [INFO] [stderr] [INFO] [stderr] warning: unused variable: `chunk` [INFO] [stderr] --> src/fileio.rs:152:29 [INFO] [stderr] | [INFO] [stderr] 152 | pub fn write(&mut self, chunk: Chunk){ [INFO] [stderr] | ^^^^^ help: consider prefixing with an underscore: `_chunk` [INFO] [stderr] [INFO] [stderr] warning: variable does not need to be mutable [INFO] [stderr] --> src/stegimage.rs:497:13 [INFO] [stderr] | [INFO] [stderr] 497 | let mut container = ContainerImage::new(test_image_path.to_str() [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/stegimage.rs:515:13 [INFO] [stderr] | [INFO] [stderr] 515 | let mut container = ContainerImage::new(test_image_path.to_str() [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/stegimage.rs:538:13 [INFO] [stderr] | [INFO] [stderr] 538 | let mut container = ContainerImage::new(test_image_path.to_str() [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/stegimage.rs:564:13 [INFO] [stderr] | [INFO] [stderr] 564 | let mut container = ContainerImage::new(test_image_path.to_str() [INFO] [stderr] | ----^^^^^^^^^ [INFO] [stderr] | | [INFO] [stderr] | help: remove this `mut` [INFO] [stderr] [INFO] [stderr] error: aborting due to previous error [INFO] [stderr] [INFO] [stderr] For more information about this error, try `rustc --explain E0716`. [INFO] [stderr] error: Could not compile `steganer`. [INFO] [stderr] warning: build failed, waiting for other jobs to finish... [INFO] [stderr] warning: field is never used: `source` [INFO] [stderr] --> src/fileio.rs:52:5 [INFO] [stderr] | [INFO] [stderr] 52 | source: File, [INFO] [stderr] | ^^^^^^^^^^^^ [INFO] [stderr] | [INFO] [stderr] = note: #[warn(dead_code)] on by default [INFO] [stderr] [INFO] [stderr] warning: field is never used: `destination` [INFO] [stderr] --> src/fileio.rs:133:5 [INFO] [stderr] | [INFO] [stderr] 133 | destination: File, [INFO] [stderr] | ^^^^^^^^^^^^^^^^^ [INFO] [stderr] [INFO] [stderr] warning: field is never used: `pending_byte` [INFO] [stderr] --> src/fileio.rs:136:5 [INFO] [stderr] | [INFO] [stderr] 136 | pending_byte: u8, [INFO] [stderr] | ^^^^^^^^^^^^^^^^ [INFO] [stderr] [INFO] [stderr] warning: field is never used: `pending_byte_written_length` [INFO] [stderr] --> src/fileio.rs:138:5 [INFO] [stderr] | [INFO] [stderr] 138 | pending_byte_written_length: u8, [INFO] [stderr] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stderr] [INFO] [stderr] warning: constant item is never used: `SIZE_LENGTH` [INFO] [stderr] --> src/stegimage.rs:16:1 [INFO] [stderr] | [INFO] [stderr] 16 | const SIZE_LENGTH: u8 = 32; [INFO] [stderr] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stderr] [INFO] [stderr] warning: field is never used: `height` [INFO] [stderr] --> src/stegimage.rs:50:5 [INFO] [stderr] | [INFO] [stderr] 50 | height: u32, [INFO] [stderr] | ^^^^^^^^^^^ [INFO] [stderr] [INFO] [stderr] warning: method is never used: `new` [INFO] [stderr] --> src/stegimage.rs:56:5 [INFO] [stderr] | [INFO] [stderr] 56 | pub fn new(file_pathname: &str)-> Self { [INFO] [stderr] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stderr] [INFO] [stderr] warning: method is never used: `setup_hiding` [INFO] [stderr] --> src/stegimage.rs:76:5 [INFO] [stderr] | [INFO] [stderr] 76 | pub fn setup_hiding(&mut self, total_data_size: u32) -> u8 { [INFO] [stderr] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stderr] [INFO] [stderr] warning: method is never used: `setup_hidden_data_extraction` [INFO] [stderr] --> src/stegimage.rs:89:5 [INFO] [stderr] | [INFO] [stderr] 89 | pub fn setup_hidden_data_extraction(&mut self){ [INFO] [stderr] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stderr] [INFO] [stderr] warning: method is never used: `get_chunk_size` [INFO] [stderr] --> src/stegimage.rs:103:5 [INFO] [stderr] | [INFO] [stderr] 103 | fn get_chunk_size(&self, total_data_size: u32)-> u8{ [INFO] [stderr] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stderr] [INFO] [stderr] warning: method is never used: `encode_header` [INFO] [stderr] --> src/stegimage.rs:116:5 [INFO] [stderr] | [INFO] [stderr] 116 | fn encode_header(&mut self, total_data_size: u32){ [INFO] [stderr] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stderr] [INFO] [stderr] warning: method is never used: `decode_header` [INFO] [stderr] --> src/stegimage.rs:131:5 [INFO] [stderr] | [INFO] [stderr] 131 | fn decode_header(&self)-> u32{ [INFO] [stderr] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stderr] [INFO] [stderr] warning: method is never used: `encode_bits` [INFO] [stderr] --> src/stegimage.rs:149:5 [INFO] [stderr] | [INFO] [stderr] 149 | fn encode_bits(&mut self, bits: u32, bits_length: u8, x: u32, y: u32){ [INFO] [stderr] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stderr] [INFO] [stderr] warning: method is never used: `overwrite_pixel` [INFO] [stderr] --> src/stegimage.rs:171:5 [INFO] [stderr] | [INFO] [stderr] 171 | fn overwrite_pixel(rgb: &[u8], bits: u32, bits_length: u8)-> [u8; 3]{ [INFO] [stderr] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stderr] [INFO] [stderr] warning: method is never used: `hide_data` [INFO] [stderr] --> src/stegimage.rs:210:5 [INFO] [stderr] | [INFO] [stderr] 210 | pub fn hide_data(&mut self, chunk: &Chunk){ [INFO] [stderr] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stderr] [INFO] [stderr] warning: method is never used: `get_image` [INFO] [stderr] --> src/stegimage.rs:229:5 [INFO] [stderr] | [INFO] [stderr] 229 | fn get_image(&mut self)-> &mut DynamicImage { [INFO] [stderr] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stderr] [INFO] [stderr] error: build failed [INFO] running `"docker" "inspect" "a51f651bdfbb04143d901a9d1c825c20ad96332aaffcc12b8c8f2cd55ec72f42"` [INFO] running `"docker" "rm" "-f" "a51f651bdfbb04143d901a9d1c825c20ad96332aaffcc12b8c8f2cd55ec72f42"` [INFO] [stdout] a51f651bdfbb04143d901a9d1c825c20ad96332aaffcc12b8c8f2cd55ec72f42