[INFO] cloning repository https://github.com/audiocogs/mp3.rs
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/audiocogs/mp3.rs" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Faudiocogs%2Fmp3.rs", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Faudiocogs%2Fmp3.rs'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 407184f0ad208eceedbeb578340a0fe76f681af5
[INFO] checking audiocogs/mp3.rs against master#bdcb6a99e853732f8ec050ae4986aa3af51d44c5 for 92191_revert
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Faudiocogs%2Fmp3.rs" "/workspace/builds/worker-43/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-43/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/audiocogs/mp3.rs on toolchain bdcb6a99e853732f8ec050ae4986aa3af51d44c5
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+bdcb6a99e853732f8ec050ae4986aa3af51d44c5" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/audiocogs/mp3.rs
[INFO] finished tweaking git repo https://github.com/audiocogs/mp3.rs
[INFO] tweaked toml for git repo https://github.com/audiocogs/mp3.rs written to /workspace/builds/worker-43/source/Cargo.toml
[INFO] crate git repo https://github.com/audiocogs/mp3.rs already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+bdcb6a99e853732f8ec050ae4986aa3af51d44c5" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-43/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-43/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:d190cb871061d98bc6d0581d85cb2ecb09a0f8a142ba5463de30be9999fc3251" "/opt/rustwide/cargo-home/bin/cargo" "+bdcb6a99e853732f8ec050ae4986aa3af51d44c5" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 3c630e2ed484268bc17adef7dbc746b23cd1b8f9abaff708cbd9000d283f005b
[INFO] running `Command { std: "docker" "start" "-a" "3c630e2ed484268bc17adef7dbc746b23cd1b8f9abaff708cbd9000d283f005b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "3c630e2ed484268bc17adef7dbc746b23cd1b8f9abaff708cbd9000d283f005b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "3c630e2ed484268bc17adef7dbc746b23cd1b8f9abaff708cbd9000d283f005b", kill_on_drop: false }`
[INFO] [stdout] 3c630e2ed484268bc17adef7dbc746b23cd1b8f9abaff708cbd9000d283f005b
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-43/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-43/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:d190cb871061d98bc6d0581d85cb2ecb09a0f8a142ba5463de30be9999fc3251" "/opt/rustwide/cargo-home/bin/cargo" "+bdcb6a99e853732f8ec050ae4986aa3af51d44c5" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 81fe9ac12bdf13be2e189e0936a26c51226f25a348a2e7e53e30ce49ec677cff
[INFO] running `Command { std: "docker" "start" "-a" "81fe9ac12bdf13be2e189e0936a26c51226f25a348a2e7e53e30ce49ec677cff", kill_on_drop: false }`
[INFO] [stderr]     Checking bitflags v0.1.1
[INFO] [stderr]     Checking mp3 v0.0.1 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `std::io::Cursor`
[INFO] [stdout]  --> src/peeker.rs:3:5
[INFO] [stdout]   |
[INFO] [stdout] 3 | use std::io::Cursor;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::io::Cursor`
[INFO] [stdout]  --> src/bitreader.rs:2:5
[INFO] [stdout]   |
[INFO] [stdout] 2 | use std::io::Cursor;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::io::SeekFrom`
[INFO] [stdout]  --> src/bitreader.rs:3:5
[INFO] [stdout]   |
[INFO] [stdout] 3 | use std::io::SeekFrom;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around `for` iterator expression
[INFO] [stdout]   --> src/bitreader.rs:19:14
[INFO] [stdout]    |
[INFO] [stdout] 19 |     for _ in (0..n) {
[INFO] [stdout]    |              ^    ^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_parens)]` on by default
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]    |
[INFO] [stdout] 19 -     for _ in (0..n) {
[INFO] [stdout] 19 +     for _ in 0..n {
[INFO] [stdout]    | 
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::io`
[INFO] [stdout]  --> src/layer1.rs:1:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::io;
[INFO] [stdout]   |     ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::io::Cursor`
[INFO] [stdout]  --> src/layer1.rs:2:5
[INFO] [stdout]   |
[INFO] [stdout] 2 | use std::io::Cursor;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]  --> src/bitreader.rs:8:20
[INFO] [stdout]   |
[INFO] [stdout] 8 |   reader: &'a mut (io::Read + 'a)
[INFO] [stdout]   |                    ^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(bare_trait_objects)]` on by default
[INFO] [stdout]   = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]   = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] help: use `dyn`
[INFO] [stdout]   |
[INFO] [stdout] 8 -   reader: &'a mut (io::Read + 'a)
[INFO] [stdout] 8 +   reader: &'a mut (dyn io::Read + 'a)
[INFO] [stdout]   | 
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::io::SeekFrom`
[INFO] [stdout]  --> src/bitreader.rs:3:5
[INFO] [stdout]   |
[INFO] [stdout] 3 | use std::io::SeekFrom;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around `for` iterator expression
[INFO] [stdout]   --> src/bitreader.rs:19:14
[INFO] [stdout]    |
[INFO] [stdout] 19 |     for _ in (0..n) {
[INFO] [stdout]    |              ^    ^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_parens)]` on by default
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]    |
[INFO] [stdout] 19 -     for _ in (0..n) {
[INFO] [stdout] 19 +     for _ in 0..n {
[INFO] [stdout]    | 
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/frame.rs:12:33
[INFO] [stdout]    |
[INFO] [stdout] 12 |   pub fn read_from(reader: &mut peeker::Peeker) -> io::Result<Option<MpegFrame>> {
[INFO] [stdout]    |                                 ^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] help: use `dyn`
[INFO] [stdout]    |
[INFO] [stdout] 12 -   pub fn read_from(reader: &mut peeker::Peeker) -> io::Result<Option<MpegFrame>> {
[INFO] [stdout] 12 +   pub fn read_from(reader: &mut dyn peeker::Peeker) -> io::Result<Option<MpegFrame>> {
[INFO] [stdout]    | 
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/header.rs:195:33
[INFO] [stdout]     |
[INFO] [stdout] 195 |   pub fn read_from(reader: &mut Peeker) -> io::Result<Option<Header>> {
[INFO] [stdout]     |                                 ^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]     = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] help: use `dyn`
[INFO] [stdout]     |
[INFO] [stdout] 195 -   pub fn read_from(reader: &mut Peeker) -> io::Result<Option<Header>> {
[INFO] [stdout] 195 +   pub fn read_from(reader: &mut dyn Peeker) -> io::Result<Option<Header>> {
[INFO] [stdout]     | 
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/bitreader.rs:12:30
[INFO] [stdout]    |
[INFO] [stdout] 12 |   pub fn new(reader: &'a mut io::Read) -> BitReader<'a> {
[INFO] [stdout]    |                              ^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] help: use `dyn`
[INFO] [stdout]    |
[INFO] [stdout] 12 -   pub fn new(reader: &'a mut io::Read) -> BitReader<'a> {
[INFO] [stdout] 12 +   pub fn new(reader: &'a mut dyn io::Read) -> BitReader<'a> {
[INFO] [stdout]    | 
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]  --> src/bitreader.rs:8:20
[INFO] [stdout]   |
[INFO] [stdout] 8 |   reader: &'a mut (io::Read + 'a)
[INFO] [stdout]   |                    ^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(bare_trait_objects)]` on by default
[INFO] [stdout]   = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]   = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] help: use `dyn`
[INFO] [stdout]   |
[INFO] [stdout] 8 -   reader: &'a mut (io::Read + 'a)
[INFO] [stdout] 8 +   reader: &'a mut (dyn io::Read + 'a)
[INFO] [stdout]   | 
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/frame.rs:12:33
[INFO] [stdout]    |
[INFO] [stdout] 12 |   pub fn read_from(reader: &mut peeker::Peeker) -> io::Result<Option<MpegFrame>> {
[INFO] [stdout]    |                                 ^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] help: use `dyn`
[INFO] [stdout]    |
[INFO] [stdout] 12 -   pub fn read_from(reader: &mut peeker::Peeker) -> io::Result<Option<MpegFrame>> {
[INFO] [stdout] 12 +   pub fn read_from(reader: &mut dyn peeker::Peeker) -> io::Result<Option<MpegFrame>> {
[INFO] [stdout]    | 
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/header.rs:195:33
[INFO] [stdout]     |
[INFO] [stdout] 195 |   pub fn read_from(reader: &mut Peeker) -> io::Result<Option<Header>> {
[INFO] [stdout]     |                                 ^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]     = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] help: use `dyn`
[INFO] [stdout]     |
[INFO] [stdout] 195 -   pub fn read_from(reader: &mut Peeker) -> io::Result<Option<Header>> {
[INFO] [stdout] 195 +   pub fn read_from(reader: &mut dyn Peeker) -> io::Result<Option<Header>> {
[INFO] [stdout]     | 
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/bitreader.rs:12:30
[INFO] [stdout]    |
[INFO] [stdout] 12 |   pub fn new(reader: &'a mut io::Read) -> BitReader<'a> {
[INFO] [stdout]    |                              ^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] help: use `dyn`
[INFO] [stdout]    |
[INFO] [stdout] 12 -   pub fn new(reader: &'a mut io::Read) -> BitReader<'a> {
[INFO] [stdout] 12 +   pub fn new(reader: &'a mut dyn io::Read) -> BitReader<'a> {
[INFO] [stdout]    | 
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::io::Seek`
[INFO] [stdout]  --> src/peeker.rs:2:5
[INFO] [stdout]   |
[INFO] [stdout] 2 | use std::io::Seek;
[INFO] [stdout]   |     ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `samples`
[INFO] [stdout]   --> src/main.rs:26:15
[INFO] [stdout]    |
[INFO] [stdout] 26 |           let samples = layer1::decode_layer1(&mut reader, h.header);
[INFO] [stdout]    |               ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_samples`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/peeker.rs:33:38
[INFO] [stdout]    |
[INFO] [stdout] 33 |   let mut pkr = Box::new(buf) as Box<Peeker>;
[INFO] [stdout]    |                                      ^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] help: use `dyn`
[INFO] [stdout]    |
[INFO] [stdout] 33 -   let mut pkr = Box::new(buf) as Box<Peeker>;
[INFO] [stdout] 33 +   let mut pkr = Box::new(buf) as Box<dyn Peeker>;
[INFO] [stdout]    | 
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/peeker.rs:41:38
[INFO] [stdout]    |
[INFO] [stdout] 41 |   let mut pkr = Box::new(buf) as Box<Peeker>;
[INFO] [stdout]    |                                      ^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] help: use `dyn`
[INFO] [stdout]    |
[INFO] [stdout] 41 -   let mut pkr = Box::new(buf) as Box<Peeker>;
[INFO] [stdout] 41 +   let mut pkr = Box::new(buf) as Box<dyn Peeker>;
[INFO] [stdout]    | 
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 12 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::io::Seek`
[INFO] [stdout]  --> src/peeker.rs:2:5
[INFO] [stdout]   |
[INFO] [stdout] 2 | use std::io::Seek;
[INFO] [stdout]   |     ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `samples`
[INFO] [stdout]   --> src/main.rs:26:15
[INFO] [stdout]    |
[INFO] [stdout] 26 |           let samples = layer1::decode_layer1(&mut reader, h.header);
[INFO] [stdout]    |               ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_samples`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/peeker.rs:32:7
[INFO] [stdout]    |
[INFO] [stdout] 32 |   let mut buf = Cursor::new(vec![0xFFu8, 0xAA, 0x44, 0xA3]);
[INFO] [stdout]    |       ----^^^
[INFO] [stdout]    |       |
[INFO] [stdout]    |       help: remove this `mut`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_mut)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/peeker.rs:40:7
[INFO] [stdout]    |
[INFO] [stdout] 40 |   let mut buf = Cursor::new(vec![0xFFu8, 0xAA, 0x44, 0xA3, 0x34, 0x99, 0x44]);
[INFO] [stdout]    |       ----^^^
[INFO] [stdout]    |       |
[INFO] [stdout]    |       help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 12 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.50s
[INFO] running `Command { std: "docker" "inspect" "81fe9ac12bdf13be2e189e0936a26c51226f25a348a2e7e53e30ce49ec677cff", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "81fe9ac12bdf13be2e189e0936a26c51226f25a348a2e7e53e30ce49ec677cff", kill_on_drop: false }`
[INFO] [stdout] 81fe9ac12bdf13be2e189e0936a26c51226f25a348a2e7e53e30ce49ec677cff