[INFO] updating cached repository 0queue/boosttorrent2
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/0queue/boosttorrent2
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/0queue/boosttorrent2" "work/ex/pr-59199/sources/master#bc44841ad2a2ad5f6c5e67b9e35ed8e7e71d4dc7/gh/0queue/boosttorrent2"`
[INFO] [stderr] Cloning into 'work/ex/pr-59199/sources/master#bc44841ad2a2ad5f6c5e67b9e35ed8e7e71d4dc7/gh/0queue/boosttorrent2'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/0queue/boosttorrent2" "work/ex/pr-59199/sources/try#68fcf881bd1e4dbfc21e22f8c7a56b8a5d8e8f7b/gh/0queue/boosttorrent2"`
[INFO] [stderr] Cloning into 'work/ex/pr-59199/sources/try#68fcf881bd1e4dbfc21e22f8c7a56b8a5d8e8f7b/gh/0queue/boosttorrent2'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] ec8523deb50ee9f4a00664aab31a6df150ee7cfd
[INFO] sha for GitHub repo 0queue/boosttorrent2: ec8523deb50ee9f4a00664aab31a6df150ee7cfd
[INFO] validating manifest of 0queue/boosttorrent2 on toolchain master#bc44841ad2a2ad5f6c5e67b9e35ed8e7e71d4dc7
[INFO] running `"/mnt/crater-raid/crater/work/local/cargo-home/bin/cargo" "+bc44841ad2a2ad5f6c5e67b9e35ed8e7e71d4dc7-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of 0queue/boosttorrent2 on toolchain try#68fcf881bd1e4dbfc21e22f8c7a56b8a5d8e8f7b
[INFO] running `"/mnt/crater-raid/crater/work/local/cargo-home/bin/cargo" "+68fcf881bd1e4dbfc21e22f8c7a56b8a5d8e8f7b-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing 0queue/boosttorrent2
[INFO] finished frobbing 0queue/boosttorrent2
[INFO] frobbed toml for 0queue/boosttorrent2 written to work/ex/pr-59199/sources/master#bc44841ad2a2ad5f6c5e67b9e35ed8e7e71d4dc7/gh/0queue/boosttorrent2/Cargo.toml
[INFO] started frobbing 0queue/boosttorrent2
[INFO] finished frobbing 0queue/boosttorrent2
[INFO] frobbed toml for 0queue/boosttorrent2 written to work/ex/pr-59199/sources/try#68fcf881bd1e4dbfc21e22f8c7a56b8a5d8e8f7b/gh/0queue/boosttorrent2/Cargo.toml
[INFO] crate 0queue/boosttorrent2 already has a lockfile, it will not be regenerated
[INFO] running `"/mnt/crater-raid/crater/work/local/cargo-home/bin/cargo" "+bc44841ad2a2ad5f6c5e67b9e35ed8e7e71d4dc7-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/crater-raid/crater/work/local/cargo-home/bin/cargo" "+68fcf881bd1e4dbfc21e22f8c7a56b8a5d8e8f7b-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] checking 0queue/boosttorrent2 against master#bc44841ad2a2ad5f6c5e67b9e35ed8e7e71d4dc7 for pr-59199
[INFO] running `"docker" "create" "-v" "/mnt/crater-raid/crater/work/local/target-dirs/pr-59199/worker-2/master#bc44841ad2a2ad5f6c5e67b9e35ed8e7e71d4dc7:/opt/crater/target:rw,Z" "-v" "/mnt/crater-raid/crater/work/ex/pr-59199/sources/master#bc44841ad2a2ad5f6c5e67b9e35ed8e7e71d4dc7/gh/0queue/boosttorrent2:/opt/crater/workdir:ro,Z" "-v" "/mnt/crater-raid/crater/work/local/cargo-home:/opt/crater/cargo-home:ro,Z" "-v" "/mnt/crater-raid/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" "+bc44841ad2a2ad5f6c5e67b9e35ed8e7e71d4dc7-alt" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stdout] 53cc4dc47a9bfe9b1f97d0f2166a40e175adacdf2cf8a88e244a6c5d02d9f579
[INFO] running `"docker" "start" "-a" "53cc4dc47a9bfe9b1f97d0f2166a40e175adacdf2cf8a88e244a6c5d02d9f579"`
[INFO] [stderr]    Compiling case v0.1.0
[INFO] [stderr]     Checking replace_with v0.1.1
[INFO] [stderr]     Checking tokio-reactor v0.1.6
[INFO] [stderr]     Checking simple_logger v1.0.1
[INFO] [stderr]     Checking tokio-fs v0.1.4
[INFO] [stderr]    Compiling derive-error v0.0.4
[INFO] [stderr]     Checking tokio-tcp v0.1.2
[INFO] [stderr]     Checking tokio-uds v0.2.3
[INFO] [stderr]     Checking tokio-udp v0.1.2
[INFO] [stderr]     Checking tokio v0.1.11
[INFO] [stderr]     Checking hyper v0.12.13
[INFO] [stderr]     Checking boosttorrent2 v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: unused import: `std::collections::HashMap`
[INFO] [stderr]  --> src/metainfo/mod.rs:5:5
[INFO] [stderr]   |
[INFO] [stderr] 5 | use std::collections::HashMap;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: #[warn(unused_imports)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `Receiver`
[INFO] [stderr]  --> src/server/mod.rs:2:36
[INFO] [stderr]   |
[INFO] [stderr] 2 | use futures::sync::mpsc::{channel, Receiver, Sender};
[INFO] [stderr]   |                                    ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::default::Default`
[INFO] [stderr]   --> src/server/mod.rs:12:5
[INFO] [stderr]    |
[INFO] [stderr] 12 | use std::default::Default;
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::ops::Deref`
[INFO] [stderr]   --> src/server/mod.rs:14:5
[INFO] [stderr]    |
[INFO] [stderr] 14 | use std::ops::Deref;
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused imports: `future`, `io::Error`
[INFO] [stderr]   --> src/server/mod.rs:17:5
[INFO] [stderr]    |
[INFO] [stderr] 17 |     io::Error,
[INFO] [stderr]    |     ^^^^^^^^^
[INFO] [stderr] ...
[INFO] [stderr] 25 |         future,
[INFO] [stderr]    |         ^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `Receiver`
[INFO] [stderr]  --> src/peer/mod.rs:3:5
[INFO] [stderr]   |
[INFO] [stderr] 3 |     Receiver,
[INFO] [stderr]   |     ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `AsyncSink`
[INFO] [stderr]   --> src/peer/mod.rs:13:9
[INFO] [stderr]    |
[INFO] [stderr] 13 |         AsyncSink,
[INFO] [stderr]    |         ^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `derive_error::Error`
[INFO] [stderr]  --> src/peer/message.rs:3:5
[INFO] [stderr]   |
[INFO] [stderr] 3 | use derive_error::Error;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::collections::HashMap`
[INFO] [stderr]  --> src/metainfo/mod.rs:5:5
[INFO] [stderr]   |
[INFO] [stderr] 5 | use std::collections::HashMap;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: #[warn(unused_imports)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused imports: `Arc`, `RwLock`
[INFO] [stderr]   --> src/tracker/test.rs:11:5
[INFO] [stderr]    |
[INFO] [stderr] 11 |     Arc,
[INFO] [stderr]    |     ^^^
[INFO] [stderr] 12 |     RwLock,
[INFO] [stderr]    |     ^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `Receiver`
[INFO] [stderr]  --> src/server/mod.rs:2:36
[INFO] [stderr]   |
[INFO] [stderr] 2 | use futures::sync::mpsc::{channel, Receiver, Sender};
[INFO] [stderr]   |                                    ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::default::Default`
[INFO] [stderr]   --> src/server/mod.rs:12:5
[INFO] [stderr]    |
[INFO] [stderr] 12 | use std::default::Default;
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::ops::Deref`
[INFO] [stderr]   --> src/server/mod.rs:14:5
[INFO] [stderr]    |
[INFO] [stderr] 14 | use std::ops::Deref;
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused imports: `future`, `io::Error`
[INFO] [stderr]   --> src/server/mod.rs:17:5
[INFO] [stderr]    |
[INFO] [stderr] 17 |     io::Error,
[INFO] [stderr]    |     ^^^^^^^^^
[INFO] [stderr] ...
[INFO] [stderr] 25 |         future,
[INFO] [stderr]    |         ^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `Receiver`
[INFO] [stderr]  --> src/peer/mod.rs:3:5
[INFO] [stderr]   |
[INFO] [stderr] 3 |     Receiver,
[INFO] [stderr]   |     ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `AsyncSink`
[INFO] [stderr]   --> src/peer/mod.rs:13:9
[INFO] [stderr]    |
[INFO] [stderr] 13 |         AsyncSink,
[INFO] [stderr]    |         ^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `derive_error::Error`
[INFO] [stderr]  --> src/peer/message.rs:3:5
[INFO] [stderr]   |
[INFO] [stderr] 3 | use derive_error::Error;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `Failure`
[INFO] [stderr]   --> src/tracker/mod.rs:76:5
[INFO] [stderr]    |
[INFO] [stderr] 76 |     Failure(String),
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(dead_code)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `Stopped`
[INFO] [stderr]   --> src/tracker/mod.rs:99:5
[INFO] [stderr]    |
[INFO] [stderr] 99 |     Stopped,
[INFO] [stderr]    |     ^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `Completed`
[INFO] [stderr]    --> src/tracker/mod.rs:100:5
[INFO] [stderr]     |
[INFO] [stderr] 100 |     Completed,
[INFO] [stderr]     |     ^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `cancel`
[INFO] [stderr]    --> src/tracker/mod.rs:232:5
[INFO] [stderr]     |
[INFO] [stderr] 232 |     pub fn cancel(&mut self, left: u64, uploaded: u64, downloaded: u64) {
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `finish`
[INFO] [stderr]    --> src/tracker/mod.rs:237:5
[INFO] [stderr]     |
[INFO] [stderr] 237 |     pub fn finish(&mut self, left: u64, uploaded: u64, downloaded: u64) {
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `refresh`
[INFO] [stderr]    --> src/tracker/mod.rs:242:5
[INFO] [stderr]     |
[INFO] [stderr] 242 |     pub fn refresh(&mut self, left: u64, uploaded: u64, downloaded: u64) {
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: field is never used: `data`
[INFO] [stderr]  --> src/piece/mod.rs:9:5
[INFO] [stderr]   |
[INFO] [stderr] 9 |     data: Vec<u8>,
[INFO] [stderr]   |     ^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: field is never used: `hasher`
[INFO] [stderr]   --> src/piece/mod.rs:10:5
[INFO] [stderr]    |
[INFO] [stderr] 10 |     hasher: Sha1,
[INFO] [stderr]    |     ^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: field is never used: `hash`
[INFO] [stderr]   --> src/piece/mod.rs:11:5
[INFO] [stderr]    |
[INFO] [stderr] 11 |     hash: [u8; 20],
[INFO] [stderr]    |     ^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: field is never used: `sub_pieces`
[INFO] [stderr]   --> src/piece/mod.rs:14:5
[INFO] [stderr]    |
[INFO] [stderr] 14 |     sub_pieces: BitVec
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `new`
[INFO] [stderr]   --> src/piece/mod.rs:18:5
[INFO] [stderr]    |
[INFO] [stderr] 18 |     pub fn new(piece_size: u32, piece_hash: [u8;20]) -> Self {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `verify`
[INFO] [stderr]   --> src/piece/mod.rs:29:5
[INFO] [stderr]    |
[INFO] [stderr] 29 |     pub fn verify(&mut self) -> bool {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: field is never used: `uploaded_sender`
[INFO] [stderr]   --> src/peer/mod.rs:25:5
[INFO] [stderr]    |
[INFO] [stderr] 25 |     uploaded_sender: Sender<u32>,
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: field is never used: `downloaded_sender`
[INFO] [stderr]   --> src/peer/mod.rs:26:5
[INFO] [stderr]    |
[INFO] [stderr] 26 |     downloaded_sender: Sender<u32>,
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: field is never used: `finished_piece_sender`
[INFO] [stderr]   --> src/peer/mod.rs:29:5
[INFO] [stderr]    |
[INFO] [stderr] 29 |     finished_piece_sender: Sender<(Piece, Sender<Piece>, BitVec)>,
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: field is never used: `peers_pieces`
[INFO] [stderr]   --> src/peer/mod.rs:30:5
[INFO] [stderr]    |
[INFO] [stderr] 30 |     peers_pieces: BitVec,
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]    --> src/boostencode/mod.rs:137:25
[INFO] [stderr]     |
[INFO] [stderr] 137 |                         write!(f, ", ");
[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]     = note: this error originates in a macro outside of the current crate (in Nightly builds, run with -Z external-macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]    --> src/boostencode/mod.rs:140:21
[INFO] [stderr]     |
[INFO] [stderr] 140 |                     write!(f, "{}", val);
[INFO] [stderr]     |                     ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr]     = note: this error originates in a macro outside of the current crate (in Nightly builds, run with -Z external-macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]    --> src/boostencode/mod.rs:147:17
[INFO] [stderr]     |
[INFO] [stderr] 147 |                 writeln!(f, "{{");
[INFO] [stderr]     |                 ^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr]     = note: this error originates in a macro outside of the current crate (in Nightly builds, run with -Z external-macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]    --> src/boostencode/mod.rs:149:21
[INFO] [stderr]     |
[INFO] [stderr] 149 |                     writeln!(f, "  {} => {}", str::from_utf8(k).unwrap_or("[...bytes...]"), v);
[INFO] [stderr]     |                     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr]     = note: this error originates in a macro outside of the current crate (in Nightly builds, run with -Z external-macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `Failure`
[INFO] [stderr]   --> src/tracker/mod.rs:76:5
[INFO] [stderr]    |
[INFO] [stderr] 76 |     Failure(String),
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(dead_code)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `Stopped`
[INFO] [stderr]   --> src/tracker/mod.rs:99:5
[INFO] [stderr]    |
[INFO] [stderr] 99 |     Stopped,
[INFO] [stderr]    |     ^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `Completed`
[INFO] [stderr]    --> src/tracker/mod.rs:100:5
[INFO] [stderr]     |
[INFO] [stderr] 100 |     Completed,
[INFO] [stderr]     |     ^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `cancel`
[INFO] [stderr]    --> src/tracker/mod.rs:232:5
[INFO] [stderr]     |
[INFO] [stderr] 232 |     pub fn cancel(&mut self, left: u64, uploaded: u64, downloaded: u64) {
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `finish`
[INFO] [stderr]    --> src/tracker/mod.rs:237:5
[INFO] [stderr]     |
[INFO] [stderr] 237 |     pub fn finish(&mut self, left: u64, uploaded: u64, downloaded: u64) {
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `refresh`
[INFO] [stderr]    --> src/tracker/mod.rs:242:5
[INFO] [stderr]     |
[INFO] [stderr] 242 |     pub fn refresh(&mut self, left: u64, uploaded: u64, downloaded: u64) {
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: field is never used: `data`
[INFO] [stderr]  --> src/piece/mod.rs:9:5
[INFO] [stderr]   |
[INFO] [stderr] 9 |     data: Vec<u8>,
[INFO] [stderr]   |     ^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: field is never used: `hasher`
[INFO] [stderr]   --> src/piece/mod.rs:10:5
[INFO] [stderr]    |
[INFO] [stderr] 10 |     hasher: Sha1,
[INFO] [stderr]    |     ^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: field is never used: `hash`
[INFO] [stderr]   --> src/piece/mod.rs:11:5
[INFO] [stderr]    |
[INFO] [stderr] 11 |     hash: [u8; 20],
[INFO] [stderr]    |     ^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: field is never used: `sub_pieces`
[INFO] [stderr]   --> src/piece/mod.rs:14:5
[INFO] [stderr]    |
[INFO] [stderr] 14 |     sub_pieces: BitVec
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `new`
[INFO] [stderr]   --> src/piece/mod.rs:18:5
[INFO] [stderr]    |
[INFO] [stderr] 18 |     pub fn new(piece_size: u32, piece_hash: [u8;20]) -> Self {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `verify`
[INFO] [stderr]   --> src/piece/mod.rs:29:5
[INFO] [stderr]    |
[INFO] [stderr] 29 |     pub fn verify(&mut self) -> bool {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: field is never used: `uploaded_sender`
[INFO] [stderr]   --> src/peer/mod.rs:25:5
[INFO] [stderr]    |
[INFO] [stderr] 25 |     uploaded_sender: Sender<u32>,
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: field is never used: `downloaded_sender`
[INFO] [stderr]   --> src/peer/mod.rs:26:5
[INFO] [stderr]    |
[INFO] [stderr] 26 |     downloaded_sender: Sender<u32>,
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: field is never used: `finished_piece_sender`
[INFO] [stderr]   --> src/peer/mod.rs:29:5
[INFO] [stderr]    |
[INFO] [stderr] 29 |     finished_piece_sender: Sender<(Piece, Sender<Piece>, BitVec)>,
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: field is never used: `peers_pieces`
[INFO] [stderr]   --> src/peer/mod.rs:30:5
[INFO] [stderr]    |
[INFO] [stderr] 30 |     peers_pieces: BitVec,
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]    --> src/boostencode/mod.rs:137:25
[INFO] [stderr]     |
[INFO] [stderr] 137 |                         write!(f, ", ");
[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]     = note: this error originates in a macro outside of the current crate (in Nightly builds, run with -Z external-macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]    --> src/boostencode/mod.rs:140:21
[INFO] [stderr]     |
[INFO] [stderr] 140 |                     write!(f, "{}", val);
[INFO] [stderr]     |                     ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr]     = note: this error originates in a macro outside of the current crate (in Nightly builds, run with -Z external-macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]    --> src/boostencode/mod.rs:147:17
[INFO] [stderr]     |
[INFO] [stderr] 147 |                 writeln!(f, "{{");
[INFO] [stderr]     |                 ^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr]     = note: this error originates in a macro outside of the current crate (in Nightly builds, run with -Z external-macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]    --> src/boostencode/mod.rs:149:21
[INFO] [stderr]     |
[INFO] [stderr] 149 |                     writeln!(f, "  {} => {}", str::from_utf8(k).unwrap_or("[...bytes...]"), v);
[INFO] [stderr]     |                     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr]     = note: this error originates in a macro outside of the current crate (in Nightly builds, run with -Z external-macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 14.76s
[INFO] running `"docker" "inspect" "53cc4dc47a9bfe9b1f97d0f2166a40e175adacdf2cf8a88e244a6c5d02d9f579"`
[INFO] running `"docker" "rm" "-f" "53cc4dc47a9bfe9b1f97d0f2166a40e175adacdf2cf8a88e244a6c5d02d9f579"`
[INFO] [stdout] 53cc4dc47a9bfe9b1f97d0f2166a40e175adacdf2cf8a88e244a6c5d02d9f579