[INFO] updating cached repository https://github.com/winkpoke/hnd
[INFO] running `"git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "-c" "remote.origin.fetch=refs/heads/*:refs/heads/*" "fetch" "origin" "--force" "--prune"`
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 26cb4dacd4e4a64ab88b8d8371d5fc4aec22640c
[INFO] checking winkpoke/hnd against try#ea663bba38739867a4b75ac820991b4f5d093c3b for pr-62262-1
[INFO] running `"git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fwinkpoke%2Fhnd" "/workspace/builds/worker-12/source"`
[INFO] [stderr] Cloning into '/workspace/builds/worker-12/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/winkpoke/hnd on toolchain ea663bba38739867a4b75ac820991b4f5d093c3b
[INFO] running `"/workspace/cargo-home/bin/cargo" "+ea663bba38739867a4b75ac820991b4f5d093c3b" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking git repo https://github.com/winkpoke/hnd
[INFO] finished tweaking git repo https://github.com/winkpoke/hnd
[INFO] tweaked toml for git repo https://github.com/winkpoke/hnd written to /workspace/builds/worker-12/source/Cargo.toml
[INFO] crate git repo https://github.com/winkpoke/hnd already has a lockfile, it will not be regenerated
[INFO] running `"/workspace/cargo-home/bin/cargo" "+ea663bba38739867a4b75ac820991b4f5d093c3b" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/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" "MAP_USER_ID=0" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--network" "none" "rustops/crates-build-env" "/opt/rustwide/cargo-home/bin/cargo" "+ea663bba38739867a4b75ac820991b4f5d093c3b" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stdout] 43e5f16a564aa104539db909162039d870c5e1116d90d55c69d79867ded2de6b
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `"docker" "start" "-a" "43e5f16a564aa104539db909162039d870c5e1116d90d55c69d79867ded2de6b"`
[INFO] [stderr]     Checking getrandom v0.1.10
[INFO] [stderr]     Checking rand_core v0.5.0
[INFO] [stderr]     Checking rand_chacha v0.2.1
[INFO] [stderr]     Checking rand v0.7.0
[INFO] [stderr]     Checking tempfile v3.1.0
[INFO] [stderr]     Checking hnd v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr] warning: unused import: `TryFrom`
[INFO] [stderr]  --> src/lib.rs:4:32
[INFO] [stderr]   |
[INFO] [stderr] 4 | use std::convert::{From, Into, TryFrom, TryInto};
[INFO] [stderr]   |                                ^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused imports: `BufReader`, `SeekFrom`, `Seek`
[INFO] [stderr]    --> src/lib.rs:823:23
[INFO] [stderr]     |
[INFO] [stderr] 823 |         use std::io::{BufReader, Read, Seek, SeekFrom};
[INFO] [stderr]     |                       ^^^^^^^^^        ^^^^  ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::convert::TryInto`
[INFO] [stderr]    --> src/lib.rs:861:13
[INFO] [stderr]     |
[INFO] [stderr] 861 |         use std::convert::TryInto;
[INFO] [stderr]     |             ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused imports: `BufReader`, `SeekFrom`, `Seek`
[INFO] [stderr]    --> src/lib.rs:862:23
[INFO] [stderr]     |
[INFO] [stderr] 862 |         use std::io::{BufReader, Read, Seek, SeekFrom};
[INFO] [stderr]     |                       ^^^^^^^^^        ^^^^  ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `TryFrom`
[INFO] [stderr]  --> src/lib.rs:4:32
[INFO] [stderr]   |
[INFO] [stderr] 4 | use std::convert::{From, Into, TryFrom, TryInto};
[INFO] [stderr]   |                                ^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `From`
[INFO] [stderr]  --> src/lib.rs:4:20
[INFO] [stderr]   |
[INFO] [stderr] 4 | use std::convert::{From, Into, TryFrom, TryInto};
[INFO] [stderr]   |                    ^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: value assigned to `v` is never read
[INFO] [stderr]    --> src/lib.rs:575:13
[INFO] [stderr]     |
[INFO] [stderr] 575 |     let mut v: u8 = 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: `len`
[INFO] [stderr]    --> src/lib.rs:736:9
[INFO] [stderr]     |
[INFO] [stderr] 736 |     let len = w * h;
[INFO] [stderr]     |         ^^^ help: consider prefixing with an underscore: `_len`
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `n`
[INFO] [stderr]    --> src/lib.rs:740:9
[INFO] [stderr]     |
[INFO] [stderr] 740 |     let n = f.seek(SeekFrom::Start(1024));
[INFO] [stderr]     |         ^ help: consider prefixing with an underscore: `_n`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `s`
[INFO] [stderr]    --> src/lib.rs:741:9
[INFO] [stderr]     |
[INFO] [stderr] 741 |     let s = f.read_to_end(&mut buf)?;
[INFO] [stderr]     |         ^ help: consider prefixing with an underscore: `_s`
[INFO] [stderr] 
[INFO] [stderr] warning: value assigned to `v` is never read
[INFO] [stderr]    --> src/lib.rs:575:13
[INFO] [stderr]     |
[INFO] [stderr] 575 |     let mut v: u8 = 0;
[INFO] [stderr]     |             ^
[INFO] [stderr]     |
[INFO] [stderr] warning: unused variable: `pos`
[INFO] [stderr]    --> src/lib.rs:252:17
[INFO] [stderr]     |
[INFO] [stderr] 252 |         let mut pos: usize = 0;
[INFO] [stderr]     |                 ^^^ help: consider prefixing with an underscore: `_pos`
[INFO] [stderr]     = note: `#[warn(unused_assignments)]` on by default
[INFO] [stderr] 
[INFO] [stderr]     = help: maybe it is overwritten before being read?
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `len`
[INFO] [stderr]    --> src/lib.rs:736:9
[INFO] [stderr]     |
[INFO] [stderr] 736 |     let len = w * h;
[INFO] [stderr]     |         ^^^ help: consider prefixing with an underscore: `_len`
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `n`
[INFO] [stderr]    --> src/lib.rs:740:9
[INFO] [stderr]     |
[INFO] [stderr] 740 |     let n = f.seek(SeekFrom::Start(1024));
[INFO] [stderr]     |         ^ help: consider prefixing with an underscore: `_n`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `s`
[INFO] [stderr]    --> src/lib.rs:741:9
[INFO] [stderr]     |
[INFO] [stderr] 741 |     let s = f.read_to_end(&mut buf)?;
[INFO] [stderr]     |         ^ help: consider prefixing with an underscore: `_s`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `pos`
[INFO] [stderr]    --> src/lib.rs:252:17
[INFO] [stderr]     |
[INFO] [stderr] 252 |         let mut pos: usize = 0;
[INFO] [stderr]     |                 ^^^ help: consider prefixing with an underscore: `_pos`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/lib.rs:20:13
[INFO] [stderr]    |
[INFO] [stderr] 20 |         let mut v = Vec::with_capacity(RAWMEMDATA_DEFAULT_SIZE);
[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] warning: unused variable: `f_out`
[INFO] [stderr]    --> src/lib.rs:834:17
[INFO] [stderr]     |
[INFO] [stderr] 834 |         let mut f_out = tempfile::tempfile().unwrap();
[INFO] [stderr]     |                 ^^^^^ help: consider prefixing with an underscore: `_f_out`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `parsed`
[INFO] [stderr]    --> src/lib.rs:894:13
[INFO] [stderr]     |
[INFO] [stderr] 894 |         let parsed = crate::decode(&test_data_hnd, width, height).unwrap();
[INFO] [stderr]     |             ^^^^^^ help: consider prefixing with an underscore: `_parsed`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/lib.rs:20:13
[INFO] [stderr]    |
[INFO] [stderr] 20 |         let mut v = Vec::with_capacity(RAWMEMDATA_DEFAULT_SIZE);
[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] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/lib.rs:252:13
[INFO] [stderr]     |
[INFO] [stderr] 252 |         let mut pos: usize = 0;
[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/lib.rs:252:13
[INFO] [stderr]     |
[INFO] [stderr] 252 |         let mut pos: usize = 0;
[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/lib.rs:834:13
[INFO] [stderr]     |
[INFO] [stderr] 834 |         let mut f_out = tempfile::tempfile().unwrap();
[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/lib.rs:883:13
[INFO] [stderr]     |
[INFO] [stderr] 883 |         let mut raw_vec_u32: Vec<u32>;
[INFO] [stderr]     |             ----^^^^^^^^^^^
[INFO] [stderr]     |             |
[INFO] [stderr]     |             help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary `unsafe` block
[INFO] [stderr]    --> src/lib.rs:789:5
[INFO] [stderr]     |
[INFO] [stderr] 789 |     unsafe {
[INFO] [stderr]     |     ^^^^^^ unnecessary `unsafe` block
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_unsafe)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: constant item is never used: `RAWMEMDATA_DEFAULT_SIZE`
[INFO] [stderr]   --> src/lib.rs:12:1
[INFO] [stderr]    |
[INFO] [stderr] 12 | const RAWMEMDATA_DEFAULT_SIZE: usize = 1024;
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `RawMemData`
[INFO] [stderr]   --> src/lib.rs:13:1
[INFO] [stderr]    |
[INFO] [stderr] 13 | struct RawMemData {
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary `unsafe` block
[INFO] [stderr] warning: method is never used: `new`
[INFO] [stderr]   --> src/lib.rs:19:5
[INFO] [stderr]    |
[INFO] [stderr] 19 |     fn new() -> RawMemData {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    --> src/lib.rs:789:5
[INFO] [stderr]     |
[INFO] [stderr] 789 |     unsafe {
[INFO] [stderr]     |     ^^^^^^ unnecessary `unsafe` block
[INFO] [stderr] 
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_unsafe)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: field is never used: `data`
[INFO] [stderr]    --> src/lib.rs:327:5
[INFO] [stderr]     |
[INFO] [stderr] 327 |     data: Vec<T>,
[INFO] [stderr]     |     ^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `write_header`
[INFO] [stderr]    --> src/lib.rs:726:1
[INFO] [stderr]     |
[INFO] [stderr] 726 | fn write_header(f: &mut File, h: &hnd_header_t) -> Result<(), io::Error> {
[INFO] [stderr]     | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: constant item is never used: `RAWMEMDATA_DEFAULT_SIZE`
[INFO] [stderr]   --> src/lib.rs:12:1
[INFO] [stderr]    |
[INFO] [stderr] 12 | const RAWMEMDATA_DEFAULT_SIZE: usize = 1024;
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `RawMemData`
[INFO] [stderr]   --> src/lib.rs:13:1
[INFO] [stderr]    |
[INFO] [stderr] 13 | struct RawMemData {
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `new`
[INFO] [stderr]   --> src/lib.rs:19:5
[INFO] [stderr]    |
[INFO] [stderr] 19 |     fn new() -> RawMemData {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: field is never used: `data`
[INFO] [stderr]    --> src/lib.rs:327:5
[INFO] [stderr]     |
[INFO] [stderr] 327 |     data: Vec<T>,
[INFO] [stderr]     |     ^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `write_header`
[INFO] [stderr]    --> src/lib.rs:726:1
[INFO] [stderr]     |
[INFO] [stderr] 726 | fn write_header(f: &mut File, h: &hnd_header_t) -> Result<(), io::Error> {
[INFO] [stderr]     | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: constant `pixel_size` should have an upper case name
[INFO] [stderr]    --> src/lib.rs:629:11
[INFO] [stderr]     |
[INFO] [stderr] 629 |     const pixel_size: usize = mem::size_of::<u32>();
[INFO] [stderr]     |           ^^^^^^^^^^ help: convert the identifier to upper case: `PIXEL_SIZE`
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(non_upper_case_globals)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: constant `pixel_size` should have an upper case name
[INFO] [stderr]    --> src/lib.rs:662:11
[INFO] [stderr]     |
[INFO] [stderr] 662 |     const pixel_size: usize = mem::size_of::<u16>();
[INFO] [stderr]     |           ^^^^^^^^^^ help: convert the identifier to upper case: `PIXEL_SIZE`
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]    --> src/lib.rs:770:5
[INFO] [stderr]     |
[INFO] [stderr] 770 |     fin.read(&mut hnd_header_raw);
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_must_use)]` on by default
[INFO] [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]    --> src/lib.rs:773:5
[INFO] [stderr]     |
[INFO] [stderr] 773 |     fin.read_to_end(&mut hnd_data_buf);
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]    --> src/lib.rs:795:5
[INFO] [stderr]     |
[INFO] [stderr] 795 |     fout.write(raw_image_buf.as_slice());
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]    --> src/lib.rs:838:9
[INFO] [stderr]     |
[INFO] [stderr] 838 |         f_raw.read_to_end(&mut raw);
[INFO] [stderr]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] 
[INFO] [stderr] warning: constant `pixel_size` should have an upper case name
[INFO] [stderr]    --> src/lib.rs:629:11
[INFO] [stderr]     |
[INFO] [stderr] 629 |     const pixel_size: usize = mem::size_of::<u32>();
[INFO] [stderr]     |           ^^^^^^^^^^ help: convert the identifier to upper case: `PIXEL_SIZE`
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(non_upper_case_globals)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: constant `pixel_size` should have an upper case name
[INFO] [stderr]    --> src/lib.rs:662:11
[INFO] [stderr]     |
[INFO] [stderr] 662 |     const pixel_size: usize = mem::size_of::<u16>();
[INFO] [stderr]     |           ^^^^^^^^^^ help: convert the identifier to upper case: `PIXEL_SIZE`
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]    --> src/lib.rs:770:5
[INFO] [stderr]     |
[INFO] [stderr] 770 |     fin.read(&mut hnd_header_raw);
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_must_use)]` on by default
[INFO] [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]    --> src/lib.rs:773:5
[INFO] [stderr]     |
[INFO] [stderr] 773 |     fin.read_to_end(&mut hnd_data_buf);
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]    --> src/lib.rs:795:5
[INFO] [stderr]     |
[INFO] [stderr] 795 |     fout.write(raw_image_buf.as_slice());
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] 
[INFO] [stderr] warning: unused imports: `From`, `Into`, `TryFrom`, `TryInto`
[INFO] [stderr]  --> src/main.rs:1:20
[INFO] [stderr]   |
[INFO] [stderr] 1 | use std::convert::{From, Into, TryFrom, TryInto};
[INFO] [stderr]   |                    ^^^^  ^^^^  ^^^^^^^  ^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::io`
[INFO] [stderr]  --> src/main.rs:4:5
[INFO] [stderr]   |
[INFO] [stderr] 4 | use std::io;
[INFO] [stderr]   |     ^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused imports: `BufReader`, `SeekFrom`, `Seek`
[INFO] [stderr]  --> src/main.rs:5:15
[INFO] [stderr]   |
[INFO] [stderr] 5 | use std::io::{BufReader, Read, Seek, SeekFrom, Write};
[INFO] [stderr]   |               ^^^^^^^^^        ^^^^  ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::mem`
[INFO] [stderr]  --> src/main.rs:6:5
[INFO] [stderr]   |
[INFO] [stderr] 6 | use std::mem;
[INFO] [stderr]   |     ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused imports: `From`, `Into`, `TryFrom`, `TryInto`
[INFO] [stderr]  --> src/main.rs:1:20
[INFO] [stderr]   |
[INFO] [stderr] 1 | use std::convert::{From, Into, TryFrom, TryInto};
[INFO] [stderr]   |                    ^^^^  ^^^^  ^^^^^^^  ^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::io`
[INFO] [stderr]  --> src/main.rs:4:5
[INFO] [stderr]   |
[INFO] [stderr] 4 | use std::io;
[INFO] [stderr]   |     ^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused imports: `BufReader`, `SeekFrom`, `Seek`
[INFO] [stderr]  --> src/main.rs:5:15
[INFO] [stderr]   |
[INFO] [stderr] 5 | use std::io::{BufReader, Read, Seek, SeekFrom, Write};
[INFO] [stderr]   |               ^^^^^^^^^        ^^^^  ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::mem`
[INFO] [stderr]  --> src/main.rs:6:5
[INFO] [stderr]   |
[INFO] [stderr] 6 | use std::mem;
[INFO] [stderr]   |     ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `matches`
[INFO] [stderr]   --> src/main.rs:50:24
[INFO] [stderr]    |
[INFO] [stderr] 50 |     } else if let Some(matches) = matches.subcommand_matches("test") {
[INFO] [stderr]    |                        ^^^^^^^ help: consider prefixing with an underscore: `_matches`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `arg_i64`
[INFO] [stderr]   --> src/main.rs:68:13
[INFO] [stderr]    |
[INFO] [stderr] 68 |         let arg_i64 =
[INFO] [stderr]    |             ^^^^^^^ help: consider prefixing with an underscore: `_arg_i64`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/main.rs:101:13
[INFO] [stderr]     |
[INFO] [stderr] 101 |         let mut n_bytes: u32 = arg_u32("n_bytes");
[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] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/main.rs:108:21
[INFO] [stderr]     |
[INFO] [stderr] 108 |                 let mut raw_image: Vec<u16> = unsafe { std::mem::transmute(buf) };
[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/main.rs:114:21
[INFO] [stderr]     |
[INFO] [stderr] 114 |                 let mut raw_image: Vec<u32> = unsafe { std::mem::transmute(buf) };
[INFO] [stderr]     |                     ----^^^^^^^^^
[INFO] [stderr]     |                     |
[INFO] [stderr]     |                     help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]    --> src/main.rs:111:17
[INFO] [stderr]     |
[INFO] [stderr] 111 |                 fout.write(&hnd_data);
[INFO] [stderr]     |                 ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_must_use)]` on by default
[INFO] [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]    --> src/main.rs:117:17
[INFO] [stderr]     |
[INFO] [stderr] 117 |                 fout.write(&hnd_data);
[INFO] [stderr]     |                 ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `matches`
[INFO] [stderr]   --> src/main.rs:50:24
[INFO] [stderr]    |
[INFO] [stderr] 50 |     } else if let Some(matches) = matches.subcommand_matches("test") {
[INFO] [stderr]    |                        ^^^^^^^ help: consider prefixing with an underscore: `_matches`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `arg_i64`
[INFO] [stderr]   --> src/main.rs:68:13
[INFO] [stderr]    |
[INFO] [stderr] 68 |         let arg_i64 =
[INFO] [stderr]    |             ^^^^^^^ help: consider prefixing with an underscore: `_arg_i64`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/main.rs:101:13
[INFO] [stderr]     |
[INFO] [stderr] 101 |         let mut n_bytes: u32 = arg_u32("n_bytes");
[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] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/main.rs:108:21
[INFO] [stderr]     |
[INFO] [stderr] 108 |                 let mut raw_image: Vec<u16> = unsafe { std::mem::transmute(buf) };
[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/main.rs:114:21
[INFO] [stderr]     |
[INFO] [stderr] 114 |                 let mut raw_image: Vec<u32> = unsafe { std::mem::transmute(buf) };
[INFO] [stderr]     |                     ----^^^^^^^^^
[INFO] [stderr]     |                     |
[INFO] [stderr]     |                     help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]    --> src/main.rs:111:17
[INFO] [stderr]     |
[INFO] [stderr] 111 |                 fout.write(&hnd_data);
[INFO] [stderr]     |                 ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_must_use)]` on by default
[INFO] [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]    --> src/main.rs:117:17
[INFO] [stderr]     |
[INFO] [stderr] 117 |                 fout.write(&hnd_data);
[INFO] [stderr]     |                 ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 6.04s
[INFO] running `"docker" "inspect" "43e5f16a564aa104539db909162039d870c5e1116d90d55c69d79867ded2de6b"`
[INFO] running `"docker" "rm" "-f" "43e5f16a564aa104539db909162039d870c5e1116d90d55c69d79867ded2de6b"`
[INFO] [stdout] 43e5f16a564aa104539db909162039d870c5e1116d90d55c69d79867ded2de6b