[INFO] updating cached repository 3541/bt
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/3541/bt
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/3541/bt" "work/ex/pr-60039-1/sources/master#e305df1846a6d985315917ae0c81b74af8b4e641/gh/3541/bt"`
[INFO] [stderr] Cloning into 'work/ex/pr-60039-1/sources/master#e305df1846a6d985315917ae0c81b74af8b4e641/gh/3541/bt'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/3541/bt" "work/ex/pr-60039-1/sources/try#99a7498759a22b5684caf798a98b7e90ad9d2443/gh/3541/bt"`
[INFO] [stderr] Cloning into 'work/ex/pr-60039-1/sources/try#99a7498759a22b5684caf798a98b7e90ad9d2443/gh/3541/bt'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 5fd7a61201e34f1a7e0a9ea237cdc54f1129fb1f
[INFO] sha for GitHub repo 3541/bt: 5fd7a61201e34f1a7e0a9ea237cdc54f1129fb1f
[INFO] validating manifest of 3541/bt on toolchain master#e305df1846a6d985315917ae0c81b74af8b4e641
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+e305df1846a6d985315917ae0c81b74af8b4e641-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of 3541/bt on toolchain try#99a7498759a22b5684caf798a98b7e90ad9d2443
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+99a7498759a22b5684caf798a98b7e90ad9d2443-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing 3541/bt
[INFO] finished frobbing 3541/bt
[INFO] frobbed toml for 3541/bt written to work/ex/pr-60039-1/sources/master#e305df1846a6d985315917ae0c81b74af8b4e641/gh/3541/bt/Cargo.toml
[INFO] started frobbing 3541/bt
[INFO] finished frobbing 3541/bt
[INFO] frobbed toml for 3541/bt written to work/ex/pr-60039-1/sources/try#99a7498759a22b5684caf798a98b7e90ad9d2443/gh/3541/bt/Cargo.toml
[INFO] crate 3541/bt already has a lockfile, it will not be regenerated
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+e305df1846a6d985315917ae0c81b74af8b4e641-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+99a7498759a22b5684caf798a98b7e90ad9d2443-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] checking 3541/bt against try#99a7498759a22b5684caf798a98b7e90ad9d2443 for pr-60039-1
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-60039-1/worker-4/try#99a7498759a22b5684caf798a98b7e90ad9d2443:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-60039-1/sources/try#99a7498759a22b5684caf798a98b7e90ad9d2443/gh/3541/bt:/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" "+99a7498759a22b5684caf798a98b7e90ad9d2443-alt" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stdout] 3822b35d11030bf55928d4260d3d88401935f3f882e6957fc9dbafda0cce8826
[INFO] running `"docker" "start" "-a" "3822b35d11030bf55928d4260d3d88401935f3f882e6957fc9dbafda0cce8826"`
[INFO] [stderr]     Checking bt v0.1.0 (/opt/crater/workdir)
[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]   = note: #[warn(unused_imports)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `super::*`
[INFO] [stderr]    --> src/torrent/bencode/mod.rs:155:9
[INFO] [stderr]     |
[INFO] [stderr] 155 |     use super::*;
[INFO] [stderr]     |         ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::fs::File`
[INFO] [stderr]    --> src/torrent/bencode/mod.rs:156:9
[INFO] [stderr]     |
[INFO] [stderr] 156 |     use std::fs::File;
[INFO] [stderr]     |         ^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::io::prelude::*`
[INFO] [stderr]    --> src/torrent/bencode/mod.rs:157:9
[INFO] [stderr]     |
[INFO] [stderr] 157 |     use std::io::prelude::*;
[INFO] [stderr]     |         ^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::io`
[INFO] [stderr]  --> src/torrent/mod.rs:7:5
[INFO] [stderr]   |
[INFO] [stderr] 7 | use std::io;
[INFO] [stderr]   |     ^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `len`
[INFO] [stderr]   --> src/torrent/mod.rs:67:41
[INFO] [stderr]    |
[INFO] [stderr] 67 |             Ok((BencodeObject::Dict(d), len)) => {
[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: `s`
[INFO] [stderr]    --> src/torrent/mod.rs:114:42
[INFO] [stderr]     |
[INFO] [stderr] 114 |                                     Some(s) => {},
[INFO] [stderr]     |                                          ^ help: consider prefixing with an underscore: `_s`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `file`
[INFO] [stderr]    --> src/torrent/mod.rs:131:22
[INFO] [stderr]     |
[INFO] [stderr] 131 |     pub fn new_multi(file: File) -> Torrent {
[INFO] [stderr]     |                      ^^^^ help: consider prefixing with an underscore: `_file`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `e`
[INFO] [stderr]    --> src/torrent/bencode/mod.rs:150:13
[INFO] [stderr]     |
[INFO] [stderr] 150 |         Err(e) => Err("Malformed string. Could not parse length".to_string()),
[INFO] [stderr]     |             ^ help: consider prefixing with an underscore: `_e`
[INFO] [stderr] 
[INFO] [stderr] warning: value assigned to `sign` is never read
[INFO] [stderr]   --> src/torrent/bencode/mod.rs:32:17
[INFO] [stderr]    |
[INFO] [stderr] 32 |         let mut sign = 1;
[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: `e`
[INFO] [stderr]   --> src/torrent/bencode/mod.rs:48:17
[INFO] [stderr]    |
[INFO] [stderr] 48 |                 e => { return Err("Unexpected character or field not delimited correctly.".to_string()) },
[INFO] [stderr]    |                 ^ help: consider prefixing with an underscore: `_e`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `e`
[INFO] [stderr]   --> src/torrent/bencode/mod.rs:53:17
[INFO] [stderr]    |
[INFO] [stderr] 53 |             Err(e) => Err("Malformed number. Did not parse.".to_string()),
[INFO] [stderr]    |                 ^ help: consider prefixing with an underscore: `_e`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `e`
[INFO] [stderr]   --> src/torrent/bencode/mod.rs:62:17
[INFO] [stderr]    |
[INFO] [stderr] 62 |             Err(e) => { return Err("Could not parse string length.".to_string()); },
[INFO] [stderr]    |                 ^ help: consider prefixing with an underscore: `_e`
[INFO] [stderr] 
[INFO] [stderr] warning: value assigned to `key` is never read
[INFO] [stderr]    --> src/torrent/bencode/mod.rs:108:21
[INFO] [stderr]     |
[INFO] [stderr] 108 |             let mut key = ByteString::new();
[INFO] [stderr]     |                     ^^^
[INFO] [stderr]     |
[INFO] [stderr]     = help: maybe it is overwritten before being read?
[INFO] [stderr] 
[INFO] [stderr] warning: value assigned to `klen` is never read
[INFO] [stderr]    --> src/torrent/bencode/mod.rs:109:21
[INFO] [stderr]     |
[INFO] [stderr] 109 |             let mut klen:usize = 0;
[INFO] [stderr]     |                     ^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = help: maybe it is overwritten before being read?
[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]   = note: #[warn(unused_imports)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::io`
[INFO] [stderr]  --> src/torrent/mod.rs:7:5
[INFO] [stderr]   |
[INFO] [stderr] 7 | use std::io;
[INFO] [stderr]   |     ^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: field is never used: `info`
[INFO] [stderr]   --> src/torrent/mod.rs:11:5
[INFO] [stderr]    |
[INFO] [stderr] 11 |     info: Info,
[INFO] [stderr]    |     ^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(dead_code)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: field is never used: `announce`
[INFO] [stderr]   --> src/torrent/mod.rs:12:5
[INFO] [stderr]    |
[INFO] [stderr] 12 |     announce: String,
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: field is never used: `creation_date`
[INFO] [stderr]   --> src/torrent/mod.rs:13:5
[INFO] [stderr]    |
[INFO] [stderr] 13 |     creation_date: Option<u64>,
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: field is never used: `created_by`
[INFO] [stderr]   --> src/torrent/mod.rs:14:5
[INFO] [stderr]    |
[INFO] [stderr] 14 |     created_by: Option<String>,
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: field is never used: `comment`
[INFO] [stderr]   --> src/torrent/mod.rs:15:5
[INFO] [stderr]    |
[INFO] [stderr] 15 |     comment: Option<String>,
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: field is never used: `info`
[INFO] [stderr]   --> src/torrent/mod.rs:19:5
[INFO] [stderr]    |
[INFO] [stderr] 19 |     info: InfoBuilder,
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: field is never used: `created_by`
[INFO] [stderr]   --> src/torrent/mod.rs:22:5
[INFO] [stderr]    |
[INFO] [stderr] 22 |     created_by: Option<String>,
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `created_by`
[INFO] [stderr]   --> src/torrent/mod.rs:41:5
[INFO] [stderr]    |
[INFO] [stderr] 41 |     fn created_by(&mut self, c: String) -> &mut TorrentBuilder {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `info`
[INFO] [stderr]   --> src/torrent/mod.rs:46:5
[INFO] [stderr]    |
[INFO] [stderr] 46 |     fn info(&mut self, i: InfoBuilder) -> &mut TorrentBuilder {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `finalize`
[INFO] [stderr]   --> src/torrent/mod.rs:56:5
[INFO] [stderr]    |
[INFO] [stderr] 56 |     fn finalize(self) -> Result<Torrent, &'static str> {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `new_multi`
[INFO] [stderr]    --> src/torrent/mod.rs:131:5
[INFO] [stderr]     |
[INFO] [stderr] 131 |     pub fn new_multi(file: File) -> Torrent {
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `print_type`
[INFO] [stderr]    --> src/torrent/mod.rs:136:1
[INFO] [stderr]     |
[INFO] [stderr] 136 | fn print_type<T>(_: &T) {
[INFO] [stderr]     | ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: field is never used: `piece_length`
[INFO] [stderr]    --> src/torrent/mod.rs:142:5
[INFO] [stderr]     |
[INFO] [stderr] 142 |     piece_length: u32,
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: field is never used: `pieces`
[INFO] [stderr]    --> src/torrent/mod.rs:143:5
[INFO] [stderr]     |
[INFO] [stderr] 143 |     pieces: Vec<[u8; 20]>,
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: field is never used: `private`
[INFO] [stderr]    --> src/torrent/mod.rs:144:5
[INFO] [stderr]     |
[INFO] [stderr] 144 |     private: bool,
[INFO] [stderr]     |     ^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: field is never used: `files`
[INFO] [stderr]    --> src/torrent/mod.rs:145:5
[INFO] [stderr]     |
[INFO] [stderr] 145 |     files: TargetFiles,
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: field is never used: `piece_length`
[INFO] [stderr]    --> src/torrent/mod.rs:149:5
[INFO] [stderr]     |
[INFO] [stderr] 149 |     piece_length: u32,
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: field is never used: `pieces`
[INFO] [stderr]    --> src/torrent/mod.rs:150:5
[INFO] [stderr]     |
[INFO] [stderr] 150 |     pieces: Vec<[u8; 20]>,
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: field is never used: `private`
[INFO] [stderr]    --> src/torrent/mod.rs:151:5
[INFO] [stderr]     |
[INFO] [stderr] 151 |     private: bool,
[INFO] [stderr]     |     ^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: field is never used: `files`
[INFO] [stderr]    --> src/torrent/mod.rs:152:5
[INFO] [stderr]     |
[INFO] [stderr] 152 |     files: TargetFiles,
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `piece_length`
[INFO] [stderr]    --> src/torrent/mod.rs:160:5
[INFO] [stderr]     |
[INFO] [stderr] 160 |     fn piece_length(&mut self, p: u32) -> &mut InfoBuilder {
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `pieces`
[INFO] [stderr]    --> src/torrent/mod.rs:165:5
[INFO] [stderr]     |
[INFO] [stderr] 165 |     fn pieces(&mut self, p: Vec<[u8; 20]>) -> &mut InfoBuilder {
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `private`
[INFO] [stderr]    --> src/torrent/mod.rs:170:5
[INFO] [stderr]     |
[INFO] [stderr] 170 |     fn private(&mut self, p: bool) -> &mut InfoBuilder {
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `files`
[INFO] [stderr]    --> src/torrent/mod.rs:175:5
[INFO] [stderr]     |
[INFO] [stderr] 175 |     fn files(&mut self, f: TargetFiles) -> &mut InfoBuilder {
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `finalize`
[INFO] [stderr]    --> src/torrent/mod.rs:180:5
[INFO] [stderr]     |
[INFO] [stderr] 180 |     fn finalize(self) -> Info {
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `Single`
[INFO] [stderr]    --> src/torrent/mod.rs:186:5
[INFO] [stderr]     |
[INFO] [stderr] 186 |     Single(TargetFile),
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: field is never used: `name`
[INFO] [stderr]    --> src/torrent/mod.rs:187:13
[INFO] [stderr]     |
[INFO] [stderr] 187 |     Multi { name: String, files: Vec<TargetFile> },
[INFO] [stderr]     |             ^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: field is never used: `files`
[INFO] [stderr]    --> src/torrent/mod.rs:187:27
[INFO] [stderr]     |
[INFO] [stderr] 187 |     Multi { name: String, files: Vec<TargetFile> },
[INFO] [stderr]     |                           ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: field is never used: `name`
[INFO] [stderr]    --> src/torrent/mod.rs:192:5
[INFO] [stderr]     |
[INFO] [stderr] 192 |     name: Option<String>,
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: field is never used: `length`
[INFO] [stderr]    --> src/torrent/mod.rs:193:5
[INFO] [stderr]     |
[INFO] [stderr] 193 |     length: u64,
[INFO] [stderr]     |     ^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: field is never used: `md5sum`
[INFO] [stderr]    --> src/torrent/mod.rs:194:5
[INFO] [stderr]     |
[INFO] [stderr] 194 |     md5sum: Option<String>,
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: field is never used: `path`
[INFO] [stderr]    --> src/torrent/mod.rs:195:5
[INFO] [stderr]     |
[INFO] [stderr] 195 |     path: Option<String>,
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `print_type`
[INFO] [stderr]   --> src/main.rs:23:1
[INFO] [stderr]    |
[INFO] [stderr] 23 | fn print_type<T>(_: &T) {
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused attribute
[INFO] [stderr]  --> src/torrent/mod.rs:4:1
[INFO] [stderr]   |
[INFO] [stderr] 4 | #![feature(core_intrinsics)]
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: #[warn(unused_attributes)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: crate-level attribute should be in the root module
[INFO] [stderr]  --> src/torrent/mod.rs:4:1
[INFO] [stderr]   |
[INFO] [stderr] 4 | #![feature(core_intrinsics)]
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]   --> src/main.rs:14:5
[INFO] [stderr]    |
[INFO] [stderr] 14 |     file.read_to_end(&mut contents);
[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 variable: `len`
[INFO] [stderr]   --> src/torrent/mod.rs:67:41
[INFO] [stderr]    |
[INFO] [stderr] 67 |             Ok((BencodeObject::Dict(d), len)) => {
[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: `s`
[INFO] [stderr]    --> src/torrent/mod.rs:114:42
[INFO] [stderr]     |
[INFO] [stderr] 114 |                                     Some(s) => {},
[INFO] [stderr]     |                                          ^ help: consider prefixing with an underscore: `_s`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `file`
[INFO] [stderr]    --> src/torrent/mod.rs:131:22
[INFO] [stderr]     |
[INFO] [stderr] 131 |     pub fn new_multi(file: File) -> Torrent {
[INFO] [stderr]     |                      ^^^^ help: consider prefixing with an underscore: `_file`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `e`
[INFO] [stderr]    --> src/torrent/bencode/mod.rs:150:13
[INFO] [stderr]     |
[INFO] [stderr] 150 |         Err(e) => Err("Malformed string. Could not parse length".to_string()),
[INFO] [stderr]     |             ^ help: consider prefixing with an underscore: `_e`
[INFO] [stderr] 
[INFO] [stderr] warning: value assigned to `sign` is never read
[INFO] [stderr]   --> src/torrent/bencode/mod.rs:32:17
[INFO] [stderr]    |
[INFO] [stderr] 32 |         let mut sign = 1;
[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: `e`
[INFO] [stderr]   --> src/torrent/bencode/mod.rs:48:17
[INFO] [stderr]    |
[INFO] [stderr] 48 |                 e => { return Err("Unexpected character or field not delimited correctly.".to_string()) },
[INFO] [stderr]    |                 ^ help: consider prefixing with an underscore: `_e`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `e`
[INFO] [stderr]   --> src/torrent/bencode/mod.rs:53:17
[INFO] [stderr]    |
[INFO] [stderr] 53 |             Err(e) => Err("Malformed number. Did not parse.".to_string()),
[INFO] [stderr]    |                 ^ help: consider prefixing with an underscore: `_e`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `e`
[INFO] [stderr]   --> src/torrent/bencode/mod.rs:62:17
[INFO] [stderr]    |
[INFO] [stderr] 62 |             Err(e) => { return Err("Could not parse string length.".to_string()); },
[INFO] [stderr]    |                 ^ help: consider prefixing with an underscore: `_e`
[INFO] [stderr] 
[INFO] [stderr] warning: value assigned to `key` is never read
[INFO] [stderr]    --> src/torrent/bencode/mod.rs:108:21
[INFO] [stderr]     |
[INFO] [stderr] 108 |             let mut key = ByteString::new();
[INFO] [stderr]     |                     ^^^
[INFO] [stderr]     |
[INFO] [stderr]     = help: maybe it is overwritten before being read?
[INFO] [stderr] 
[INFO] [stderr] warning: value assigned to `klen` is never read
[INFO] [stderr]    --> src/torrent/bencode/mod.rs:109:21
[INFO] [stderr]     |
[INFO] [stderr] 109 |             let mut klen:usize = 0;
[INFO] [stderr]     |                     ^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = help: maybe it is overwritten before being read?
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `len`
[INFO] [stderr]    --> src/torrent/bencode/mod.rs:227:38
[INFO] [stderr]     |
[INFO] [stderr] 227 |             (BencodeObject::Dict(d), len) => {
[INFO] [stderr]     |                                      ^^^ help: consider prefixing with an underscore: `_len`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `len`
[INFO] [stderr]    --> src/torrent/bencode/mod.rs:259:37
[INFO] [stderr]     |
[INFO] [stderr] 259 |            (BencodeObject::Dict(d), len) => {
[INFO] [stderr]     |                                     ^^^ help: consider prefixing with an underscore: `_len`
[INFO] [stderr] 
[INFO] [stderr] warning: field is never used: `info`
[INFO] [stderr]   --> src/torrent/mod.rs:11:5
[INFO] [stderr]    |
[INFO] [stderr] 11 |     info: Info,
[INFO] [stderr]    |     ^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(dead_code)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: field is never used: `announce`
[INFO] [stderr]   --> src/torrent/mod.rs:12:5
[INFO] [stderr]    |
[INFO] [stderr] 12 |     announce: String,
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: field is never used: `creation_date`
[INFO] [stderr]   --> src/torrent/mod.rs:13:5
[INFO] [stderr]    |
[INFO] [stderr] 13 |     creation_date: Option<u64>,
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: field is never used: `created_by`
[INFO] [stderr]   --> src/torrent/mod.rs:14:5
[INFO] [stderr]    |
[INFO] [stderr] 14 |     created_by: Option<String>,
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: field is never used: `comment`
[INFO] [stderr]   --> src/torrent/mod.rs:15:5
[INFO] [stderr]    |
[INFO] [stderr] 15 |     comment: Option<String>,
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: field is never used: `info`
[INFO] [stderr]   --> src/torrent/mod.rs:19:5
[INFO] [stderr]    |
[INFO] [stderr] 19 |     info: InfoBuilder,
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: field is never used: `created_by`
[INFO] [stderr]   --> src/torrent/mod.rs:22:5
[INFO] [stderr]    |
[INFO] [stderr] 22 |     created_by: Option<String>,
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `created_by`
[INFO] [stderr]   --> src/torrent/mod.rs:41:5
[INFO] [stderr]    |
[INFO] [stderr] 41 |     fn created_by(&mut self, c: String) -> &mut TorrentBuilder {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `info`
[INFO] [stderr]   --> src/torrent/mod.rs:46:5
[INFO] [stderr]    |
[INFO] [stderr] 46 |     fn info(&mut self, i: InfoBuilder) -> &mut TorrentBuilder {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `finalize`
[INFO] [stderr]   --> src/torrent/mod.rs:56:5
[INFO] [stderr]    |
[INFO] [stderr] 56 |     fn finalize(self) -> Result<Torrent, &'static str> {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `new_multi`
[INFO] [stderr]    --> src/torrent/mod.rs:131:5
[INFO] [stderr]     |
[INFO] [stderr] 131 |     pub fn new_multi(file: File) -> Torrent {
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `print_type`
[INFO] [stderr]    --> src/torrent/mod.rs:136:1
[INFO] [stderr]     |
[INFO] [stderr] 136 | fn print_type<T>(_: &T) {
[INFO] [stderr]     | ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: field is never used: `piece_length`
[INFO] [stderr]    --> src/torrent/mod.rs:142:5
[INFO] [stderr]     |
[INFO] [stderr] 142 |     piece_length: u32,
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: field is never used: `pieces`
[INFO] [stderr]    --> src/torrent/mod.rs:143:5
[INFO] [stderr]     |
[INFO] [stderr] 143 |     pieces: Vec<[u8; 20]>,
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: field is never used: `private`
[INFO] [stderr]    --> src/torrent/mod.rs:144:5
[INFO] [stderr]     |
[INFO] [stderr] 144 |     private: bool,
[INFO] [stderr]     |     ^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: field is never used: `files`
[INFO] [stderr]    --> src/torrent/mod.rs:145:5
[INFO] [stderr]     |
[INFO] [stderr] 145 |     files: TargetFiles,
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: field is never used: `piece_length`
[INFO] [stderr]    --> src/torrent/mod.rs:149:5
[INFO] [stderr]     |
[INFO] [stderr] 149 |     piece_length: u32,
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: field is never used: `pieces`
[INFO] [stderr]    --> src/torrent/mod.rs:150:5
[INFO] [stderr]     |
[INFO] [stderr] 150 |     pieces: Vec<[u8; 20]>,
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: field is never used: `private`
[INFO] [stderr]    --> src/torrent/mod.rs:151:5
[INFO] [stderr]     |
[INFO] [stderr] 151 |     private: bool,
[INFO] [stderr]     |     ^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: field is never used: `files`
[INFO] [stderr]    --> src/torrent/mod.rs:152:5
[INFO] [stderr]     |
[INFO] [stderr] 152 |     files: TargetFiles,
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `piece_length`
[INFO] [stderr]    --> src/torrent/mod.rs:160:5
[INFO] [stderr]     |
[INFO] [stderr] 160 |     fn piece_length(&mut self, p: u32) -> &mut InfoBuilder {
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `pieces`
[INFO] [stderr]    --> src/torrent/mod.rs:165:5
[INFO] [stderr]     |
[INFO] [stderr] 165 |     fn pieces(&mut self, p: Vec<[u8; 20]>) -> &mut InfoBuilder {
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `private`
[INFO] [stderr]    --> src/torrent/mod.rs:170:5
[INFO] [stderr]     |
[INFO] [stderr] 170 |     fn private(&mut self, p: bool) -> &mut InfoBuilder {
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `files`
[INFO] [stderr]    --> src/torrent/mod.rs:175:5
[INFO] [stderr]     |
[INFO] [stderr] 175 |     fn files(&mut self, f: TargetFiles) -> &mut InfoBuilder {
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `finalize`
[INFO] [stderr]    --> src/torrent/mod.rs:180:5
[INFO] [stderr]     |
[INFO] [stderr] 180 |     fn finalize(self) -> Info {
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `Single`
[INFO] [stderr]    --> src/torrent/mod.rs:186:5
[INFO] [stderr]     |
[INFO] [stderr] 186 |     Single(TargetFile),
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: field is never used: `name`
[INFO] [stderr]    --> src/torrent/mod.rs:187:13
[INFO] [stderr]     |
[INFO] [stderr] 187 |     Multi { name: String, files: Vec<TargetFile> },
[INFO] [stderr]     |             ^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: field is never used: `files`
[INFO] [stderr]    --> src/torrent/mod.rs:187:27
[INFO] [stderr]     |
[INFO] [stderr] 187 |     Multi { name: String, files: Vec<TargetFile> },
[INFO] [stderr]     |                           ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: field is never used: `name`
[INFO] [stderr]    --> src/torrent/mod.rs:192:5
[INFO] [stderr]     |
[INFO] [stderr] 192 |     name: Option<String>,
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: field is never used: `length`
[INFO] [stderr]    --> src/torrent/mod.rs:193:5
[INFO] [stderr]     |
[INFO] [stderr] 193 |     length: u64,
[INFO] [stderr]     |     ^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: field is never used: `md5sum`
[INFO] [stderr]    --> src/torrent/mod.rs:194:5
[INFO] [stderr]     |
[INFO] [stderr] 194 |     md5sum: Option<String>,
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: field is never used: `path`
[INFO] [stderr]    --> src/torrent/mod.rs:195:5
[INFO] [stderr]     |
[INFO] [stderr] 195 |     path: Option<String>,
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `print_type`
[INFO] [stderr]   --> src/main.rs:23:1
[INFO] [stderr]    |
[INFO] [stderr] 23 | fn print_type<T>(_: &T) {
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused attribute
[INFO] [stderr]  --> src/torrent/mod.rs:4:1
[INFO] [stderr]   |
[INFO] [stderr] 4 | #![feature(core_intrinsics)]
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: #[warn(unused_attributes)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: crate-level attribute should be in the root module
[INFO] [stderr]  --> src/torrent/mod.rs:4:1
[INFO] [stderr]   |
[INFO] [stderr] 4 | #![feature(core_intrinsics)]
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]   --> src/main.rs:14:5
[INFO] [stderr]    |
[INFO] [stderr] 14 |     file.read_to_end(&mut contents);
[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/torrent/bencode/mod.rs:256:8
[INFO] [stderr]     |
[INFO] [stderr] 256 |        file.read_to_end(&mut contents);
[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 1.35s
[INFO] running `"docker" "inspect" "3822b35d11030bf55928d4260d3d88401935f3f882e6957fc9dbafda0cce8826"`
[INFO] running `"docker" "rm" "-f" "3822b35d11030bf55928d4260d3d88401935f3f882e6957fc9dbafda0cce8826"`
[INFO] [stdout] 3822b35d11030bf55928d4260d3d88401935f3f882e6957fc9dbafda0cce8826