[INFO] cloning repository https://github.com/ammongit/markov-music
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/ammongit/markov-music" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fammongit%2Fmarkov-music", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fammongit%2Fmarkov-music'...
[INFO] updating cached repository https://github.com/ammongit/markov-music
[INFO] running `Command { std: "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", kill_on_drop: false }`
[INFO] updating cached repository https://github.com/ammongit/markov-music
[INFO] running `Command { std: "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", kill_on_drop: false }`
[INFO] updating cached repository https://github.com/ammongit/markov-music
[INFO] running `Command { std: "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", kill_on_drop: false }`
[INFO] updating cached repository https://github.com/ammongit/markov-music
[INFO] running `Command { std: "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", kill_on_drop: false }`
[INFO] updating cached repository https://github.com/ammongit/markov-music
[INFO] running `Command { std: "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", kill_on_drop: false }`
[INFO] updating cached repository https://github.com/ammongit/markov-music
[INFO] running `Command { std: "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", kill_on_drop: false }`
[INFO] updating cached repository https://github.com/ammongit/markov-music
[INFO] running `Command { std: "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", kill_on_drop: false }`
[INFO] updating cached repository https://github.com/ammongit/markov-music
[INFO] running `Command { std: "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", kill_on_drop: false }`
[INFO] updating cached repository https://github.com/ammongit/markov-music
[INFO] running `Command { std: "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", kill_on_drop: false }`
[INFO] updating cached repository https://github.com/ammongit/markov-music
[INFO] running `Command { std: "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", kill_on_drop: false }`
[INFO] updating cached repository https://github.com/ammongit/markov-music
[INFO] running `Command { std: "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", kill_on_drop: false }`
[INFO] updating cached repository https://github.com/ammongit/markov-music
[INFO] running `Command { std: "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", kill_on_drop: false }`
[INFO] updating cached repository https://github.com/ammongit/markov-music
[INFO] running `Command { std: "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", kill_on_drop: false }`
[INFO] updating cached repository https://github.com/ammongit/markov-music
[INFO] running `Command { std: "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", kill_on_drop: false }`
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 68dea06d36893e7050d554ddc802504ddc3dddff
[INFO] checking ammongit/markov-music against master#af7ab3447079fddc51c6c7749b160d24769f7c16 for pr-99413
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fammongit%2Fmarkov-music" "/workspace/builds/worker-6/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-6/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/ammongit/markov-music on toolchain af7ab3447079fddc51c6c7749b160d24769f7c16
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+af7ab3447079fddc51c6c7749b160d24769f7c16" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/ammongit/markov-music
[INFO] finished tweaking git repo https://github.com/ammongit/markov-music
[INFO] tweaked toml for git repo https://github.com/ammongit/markov-music written to /workspace/builds/worker-6/source/Cargo.toml
[INFO] crate git repo https://github.com/ammongit/markov-music already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+af7ab3447079fddc51c6c7749b160d24769f7c16" "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-6/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/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:ecb52c4cf6672b83cc996368a05b4a059042425f2b6ba9cd23a06cdead5d8d70" "/opt/rustwide/cargo-home/bin/cargo" "+af7ab3447079fddc51c6c7749b160d24769f7c16" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] de28dd2ffee0b413651d82e747ae7464bd71088bad5ec34a36c529ea596e005c
[INFO] running `Command { std: "docker" "start" "-a" "de28dd2ffee0b413651d82e747ae7464bd71088bad5ec34a36c529ea596e005c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "de28dd2ffee0b413651d82e747ae7464bd71088bad5ec34a36c529ea596e005c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "de28dd2ffee0b413651d82e747ae7464bd71088bad5ec34a36c529ea596e005c", kill_on_drop: false }`
[INFO] [stdout] de28dd2ffee0b413651d82e747ae7464bd71088bad5ec34a36c529ea596e005c
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/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" "RUSTDOCFLAGS=--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:ecb52c4cf6672b83cc996368a05b4a059042425f2b6ba9cd23a06cdead5d8d70" "/opt/rustwide/cargo-home/bin/cargo" "+af7ab3447079fddc51c6c7749b160d24769f7c16" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] ae843de7d2cf387bc5e75e44e524e8495eb090b391cc37845c5c30976d7104f4
[INFO] running `Command { std: "docker" "start" "-a" "ae843de7d2cf387bc5e75e44e524e8495eb090b391cc37845c5c30976d7104f4", kill_on_drop: false }`
[INFO] [stderr]     Checking libc v0.2.40
[INFO] [stderr]    Compiling unicode-xid v0.0.4
[INFO] [stderr]    Compiling quote v0.3.15
[INFO] [stderr]    Compiling pkg-config v0.3.9
[INFO] [stderr]     Checking cfg-if v0.1.2
[INFO] [stderr]     Checking unicode-width v0.1.4
[INFO] [stderr]     Checking lazy_static v1.0.0
[INFO] [stderr]     Checking vec_map v0.8.0
[INFO] [stderr]     Checking unicode-segmentation v1.2.0
[INFO] [stderr]     Checking rustc-serialize v0.3.24
[INFO] [stderr]     Checking strsim v0.6.0
[INFO] [stderr]     Checking bitflags v0.9.1
[INFO] [stderr]     Checking ansi_term v0.9.0
[INFO] [stderr]     Checking bufstream v0.1.3
[INFO] [stderr]     Checking byteorder v1.1.0
[INFO] [stderr]     Checking log v0.4.1
[INFO] [stderr]    Compiling synom v0.11.3
[INFO] [stderr]    Compiling syn v0.11.11
[INFO] [stderr]    Compiling libsqlite3-sys v0.9.1
[INFO] [stderr]     Checking term_size v0.3.0
[INFO] [stderr]     Checking thread-id v3.2.0
[INFO] [stderr]     Checking time v0.1.39
[INFO] [stderr]     Checking atty v0.2.2
[INFO] [stderr]     Checking rand v0.4.2
[INFO] [stderr]     Checking simple-logging v2.0.1
[INFO] [stderr]     Checking textwrap v0.7.0
[INFO] [stderr]     Checking clap v2.26.0
[INFO] [stderr]    Compiling serde_derive_internals v0.19.0
[INFO] [stderr]     Checking mpd v0.0.12
[INFO] [stderr]    Compiling diesel_derives v1.1.0
[INFO] [stderr]    Compiling serde_derive v1.0.27
[INFO] [stderr]     Checking diesel v1.1.1
[INFO] [stderr]     Checking serde v1.0.11
[INFO] [stderr]     Checking toml v0.4.4
[INFO] [stderr]     Checking markov-music v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: use of deprecated constant `std::sync::ONCE_INIT`: the `new` function is now preferred
[INFO] [stdout]   --> src/config.rs:29:1
[INFO] [stdout]    |
[INFO] [stdout] 29 | / lazy_static! {
[INFO] [stdout] 30 | |     static ref DEFAULT_CONFIG_PATH: PathBuf = {
[INFO] [stdout] 31 | |         let mut dir = match env::var_os("XDG_CONFIG_HOME") {
[INFO] [stdout] 32 | |             Some(dir) => PathBuf::from(dir),
[INFO] [stdout] ...  |
[INFO] [stdout] 42 | |     };
[INFO] [stdout] 43 | | }
[INFO] [stdout]    | |_^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(deprecated)]` on by default
[INFO] [stdout]    = note: this warning originates in the macro `__lazy_static_create` which comes from the expansion of the macro `lazy_static` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated associated function `std::error::Error::description`: use the Display impl or to_string()
[INFO] [stdout]   --> src/error.rs:73:35
[INFO] [stdout]    |
[INFO] [stdout] 73 |         write!(f, "{}", StdError::description(self))
[INFO] [stdout]    |                                   ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated function `std::env::home_dir`: This function's behavior is unexpected and probably not what you want. Consider using a crate from crates.io instead.
[INFO] [stdout]   --> src/utils.rs:25:45
[INFO] [stdout]    |
[INFO] [stdout] 25 |     pub static ref HOME_DIR: PathBuf = env::home_dir().expect("Unable to get home directory");
[INFO] [stdout]    |                                             ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated constant `std::sync::ONCE_INIT`: the `new` function is now preferred
[INFO] [stdout]   --> src/utils.rs:24:1
[INFO] [stdout]    |
[INFO] [stdout] 24 | / lazy_static! {
[INFO] [stdout] 25 | |     pub static ref HOME_DIR: PathBuf = env::home_dir().expect("Unable to get home directory");
[INFO] [stdout] 26 | | }
[INFO] [stdout]    | |_^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this warning originates in the macro `__lazy_static_create` which comes from the expansion of the macro `lazy_static` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/choose.rs:29:74
[INFO] [stdout]    |
[INFO] [stdout] 29 | pub fn random_key<'a, K: Eq + Hash, V>(map: &'a HashMap<K, V>, rng: &mut Rng) -> Option<&'a K> {
[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] 29 - pub fn random_key<'a, K: Eq + Hash, V>(map: &'a HashMap<K, V>, rng: &mut Rng) -> Option<&'a K> {
[INFO] [stdout] 29 + pub fn random_key<'a, K: Eq + Hash, V>(map: &'a HashMap<K, V>, rng: &mut dyn Rng) -> Option<&'a K> {
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/choose.rs:34:77
[INFO] [stdout]    |
[INFO] [stdout] 34 | pub fn roulette_wheel<'a, K: Eq + Hash>(map: &'a HashMap<K, f32>, rng: &mut Rng) -> Option<&'a K> {
[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] 34 - pub fn roulette_wheel<'a, K: Eq + Hash>(map: &'a HashMap<K, f32>, rng: &mut Rng) -> Option<&'a K> {
[INFO] [stdout] 34 + pub fn roulette_wheel<'a, K: Eq + Hash>(map: &'a HashMap<K, f32>, rng: &mut dyn Rng) -> Option<&'a K> {
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/error.rs:57:32
[INFO] [stdout]    |
[INFO] [stdout] 57 |     fn cause(&self) -> Option<&StdError> {
[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] 57 -     fn cause(&self) -> Option<&StdError> {
[INFO] [stdout] 57 +     fn cause(&self) -> Option<&dyn StdError> {
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/markov.rs:64:35
[INFO] [stdout]    |
[INFO] [stdout] 64 |     pub fn start(&self, rng: &mut Rng) -> Option<&T> {
[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] 64 -     pub fn start(&self, rng: &mut Rng) -> Option<&T> {
[INFO] [stdout] 64 +     pub fn start(&self, rng: &mut dyn Rng) -> Option<&T> {
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/markov.rs:68:50
[INFO] [stdout]    |
[INFO] [stdout] 68 |     pub fn next<U>(&self, current: &U, rng: &mut Rng) -> Option<&T>
[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] 68 -     pub fn next<U>(&self, current: &U, rng: &mut Rng) -> Option<&T>
[INFO] [stdout] 68 +     pub fn next<U>(&self, current: &U, rng: &mut dyn Rng) -> Option<&T>
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated constant `std::sync::ONCE_INIT`: the `new` function is now preferred
[INFO] [stdout]   --> src/config.rs:29:1
[INFO] [stdout]    |
[INFO] [stdout] 29 | / lazy_static! {
[INFO] [stdout] 30 | |     static ref DEFAULT_CONFIG_PATH: PathBuf = {
[INFO] [stdout] 31 | |         let mut dir = match env::var_os("XDG_CONFIG_HOME") {
[INFO] [stdout] 32 | |             Some(dir) => PathBuf::from(dir),
[INFO] [stdout] ...  |
[INFO] [stdout] 42 | |     };
[INFO] [stdout] 43 | | }
[INFO] [stdout]    | |_^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(deprecated)]` on by default
[INFO] [stdout]    = note: this warning originates in the macro `__lazy_static_create` which comes from the expansion of the macro `lazy_static` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated associated function `std::error::Error::description`: use the Display impl or to_string()
[INFO] [stdout]   --> src/error.rs:73:35
[INFO] [stdout]    |
[INFO] [stdout] 73 |         write!(f, "{}", StdError::description(self))
[INFO] [stdout]    |                                   ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated function `std::env::home_dir`: This function's behavior is unexpected and probably not what you want. Consider using a crate from crates.io instead.
[INFO] [stdout]   --> src/utils.rs:25:45
[INFO] [stdout]    |
[INFO] [stdout] 25 |     pub static ref HOME_DIR: PathBuf = env::home_dir().expect("Unable to get home directory");
[INFO] [stdout]    |                                             ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated constant `std::sync::ONCE_INIT`: the `new` function is now preferred
[INFO] [stdout]   --> src/utils.rs:24:1
[INFO] [stdout]    |
[INFO] [stdout] 24 | / lazy_static! {
[INFO] [stdout] 25 | |     pub static ref HOME_DIR: PathBuf = env::home_dir().expect("Unable to get home directory");
[INFO] [stdout] 26 | | }
[INFO] [stdout]    | |_^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this warning originates in the macro `__lazy_static_create` which comes from the expansion of the macro `lazy_static` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/choose.rs:29:74
[INFO] [stdout]    |
[INFO] [stdout] 29 | pub fn random_key<'a, K: Eq + Hash, V>(map: &'a HashMap<K, V>, rng: &mut Rng) -> Option<&'a K> {
[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] 29 - pub fn random_key<'a, K: Eq + Hash, V>(map: &'a HashMap<K, V>, rng: &mut Rng) -> Option<&'a K> {
[INFO] [stdout] 29 + pub fn random_key<'a, K: Eq + Hash, V>(map: &'a HashMap<K, V>, rng: &mut dyn Rng) -> Option<&'a K> {
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/choose.rs:34:77
[INFO] [stdout]    |
[INFO] [stdout] 34 | pub fn roulette_wheel<'a, K: Eq + Hash>(map: &'a HashMap<K, f32>, rng: &mut Rng) -> Option<&'a K> {
[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] 34 - pub fn roulette_wheel<'a, K: Eq + Hash>(map: &'a HashMap<K, f32>, rng: &mut Rng) -> Option<&'a K> {
[INFO] [stdout] 34 + pub fn roulette_wheel<'a, K: Eq + Hash>(map: &'a HashMap<K, f32>, rng: &mut dyn Rng) -> Option<&'a K> {
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/error.rs:57:32
[INFO] [stdout]    |
[INFO] [stdout] 57 |     fn cause(&self) -> Option<&StdError> {
[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] 57 -     fn cause(&self) -> Option<&StdError> {
[INFO] [stdout] 57 +     fn cause(&self) -> Option<&dyn StdError> {
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/markov.rs:64:35
[INFO] [stdout]    |
[INFO] [stdout] 64 |     pub fn start(&self, rng: &mut Rng) -> Option<&T> {
[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] 64 -     pub fn start(&self, rng: &mut Rng) -> Option<&T> {
[INFO] [stdout] 64 +     pub fn start(&self, rng: &mut dyn Rng) -> Option<&T> {
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/markov.rs:68:50
[INFO] [stdout]    |
[INFO] [stdout] 68 |     pub fn next<U>(&self, current: &U, rng: &mut Rng) -> Option<&T>
[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] 68 -     pub fn next<U>(&self, current: &U, rng: &mut Rng) -> Option<&T>
[INFO] [stdout] 68 +     pub fn next<U>(&self, current: &U, rng: &mut dyn Rng) -> Option<&T>
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated associated function `std::error::Error::description`: use the Display impl or to_string()
[INFO] [stdout]   --> src/error.rs:47:28
[INFO] [stdout]    |
[INFO] [stdout] 47 |             Io(ref e) => e.description(),
[INFO] [stdout]    |                            ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated associated function `std::error::Error::description`: use the Display impl or to_string()
[INFO] [stdout]   --> src/error.rs:48:34
[INFO] [stdout]    |
[INFO] [stdout] 48 |             IntParse(ref e) => e.description(),
[INFO] [stdout]    |                                  ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated associated function `std::error::Error::description`: use the Display impl or to_string()
[INFO] [stdout]   --> src/error.rs:49:30
[INFO] [stdout]    |
[INFO] [stdout] 49 |             Utf8(ref e) => e.description(),
[INFO] [stdout]    |                              ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated associated function `std::error::Error::description`: use the Display impl or to_string()
[INFO] [stdout]   --> src/error.rs:50:32
[INFO] [stdout]    |
[INFO] [stdout] 50 |             TomlDe(ref e) => e.description(),
[INFO] [stdout]    |                                ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated associated function `std::error::Error::description`: use the Display impl or to_string()
[INFO] [stdout]   --> src/error.rs:51:34
[INFO] [stdout]    |
[INFO] [stdout] 51 |             MpdParse(ref e) => e.description(),
[INFO] [stdout]    |                                  ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated associated function `std::error::Error::description`: use the Display impl or to_string()
[INFO] [stdout]   --> src/error.rs:52:34
[INFO] [stdout]    |
[INFO] [stdout] 52 |             MpdProto(ref e) => e.description(),
[INFO] [stdout]    |                                  ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated associated function `std::error::Error::description`: use the Display impl or to_string()
[INFO] [stdout]   --> src/error.rs:53:35
[INFO] [stdout]    |
[INFO] [stdout] 53 |             MpdServer(ref e) => e.description(),
[INFO] [stdout]    |                                   ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated associated function `std::error::Error::description`: use the Display impl or to_string()
[INFO] [stdout]   --> src/error.rs:47:28
[INFO] [stdout]    |
[INFO] [stdout] 47 |             Io(ref e) => e.description(),
[INFO] [stdout]    |                            ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated associated function `std::error::Error::description`: use the Display impl or to_string()
[INFO] [stdout]   --> src/error.rs:48:34
[INFO] [stdout]    |
[INFO] [stdout] 48 |             IntParse(ref e) => e.description(),
[INFO] [stdout]    |                                  ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated associated function `std::error::Error::description`: use the Display impl or to_string()
[INFO] [stdout]   --> src/error.rs:49:30
[INFO] [stdout]    |
[INFO] [stdout] 49 |             Utf8(ref e) => e.description(),
[INFO] [stdout]    |                              ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated associated function `std::error::Error::description`: use the Display impl or to_string()
[INFO] [stdout]   --> src/error.rs:50:32
[INFO] [stdout]    |
[INFO] [stdout] 50 |             TomlDe(ref e) => e.description(),
[INFO] [stdout]    |                                ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated associated function `std::error::Error::description`: use the Display impl or to_string()
[INFO] [stdout]   --> src/error.rs:51:34
[INFO] [stdout]    |
[INFO] [stdout] 51 |             MpdParse(ref e) => e.description(),
[INFO] [stdout]    |                                  ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated associated function `std::error::Error::description`: use the Display impl or to_string()
[INFO] [stdout]   --> src/error.rs:52:34
[INFO] [stdout]    |
[INFO] [stdout] 52 |             MpdProto(ref e) => e.description(),
[INFO] [stdout]    |                                  ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated associated function `std::error::Error::description`: use the Display impl or to_string()
[INFO] [stdout]   --> src/error.rs:53:35
[INFO] [stdout]    |
[INFO] [stdout] 53 |             MpdServer(ref e) => e.description(),
[INFO] [stdout]    |                                   ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `random_key` is never used
[INFO] [stdout]   --> src/choose.rs:29:8
[INFO] [stdout]    |
[INFO] [stdout] 29 | pub fn random_key<'a, K: Eq + Hash, V>(map: &'a HashMap<K, V>, rng: &mut Rng) -> Option<&'a K> {
[INFO] [stdout]    |        ^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `roulette_wheel` is never used
[INFO] [stdout]   --> src/choose.rs:34:8
[INFO] [stdout]    |
[INFO] [stdout] 34 | pub fn roulette_wheel<'a, K: Eq + Hash>(map: &'a HashMap<K, f32>, rng: &mut Rng) -> Option<&'a K> {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function `modify_weight` is never used
[INFO] [stdout]   --> src/markov.rs:47:12
[INFO] [stdout]    |
[INFO] [stdout] 47 |     pub fn modify_weight(&mut self, prev: T, next: T, diff: f32) {
[INFO] [stdout]    |            ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function `clear` is never used
[INFO] [stdout]   --> src/markov.rs:55:12
[INFO] [stdout]    |
[INFO] [stdout] 55 |     pub fn clear<U>(&mut self, item: &U)
[INFO] [stdout]    |            ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function `start` is never used
[INFO] [stdout]   --> src/markov.rs:64:12
[INFO] [stdout]    |
[INFO] [stdout] 64 |     pub fn start(&self, rng: &mut Rng) -> Option<&T> {
[INFO] [stdout]    |            ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function `next` is never used
[INFO] [stdout]   --> src/markov.rs:68:12
[INFO] [stdout]    |
[INFO] [stdout] 68 |     pub fn next<U>(&self, current: &U, rng: &mut Rng) -> Option<&T>
[INFO] [stdout]    |            ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function `possible_next` is never used
[INFO] [stdout]   --> src/markov.rs:78:12
[INFO] [stdout]    |
[INFO] [stdout] 78 |     pub fn possible_next<U>(&self, current: &U) -> Option<&HashMap<T, f32>>
[INFO] [stdout]    |            ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `split_cmd` is never used
[INFO] [stdout]   --> src/socket.rs:28:4
[INFO] [stdout]    |
[INFO] [stdout] 28 | fn split_cmd(command: &mut str) -> (&mut str, &mut str) {
[INFO] [stdout]    |    ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `socket` is never read
[INFO] [stdout]   --> src/socket.rs:37:5
[INFO] [stdout]    |
[INFO] [stdout] 36 | pub struct SocketServer {
[INFO] [stdout]    |            ------------ field in this struct
[INFO] [stdout] 37 |     socket: UnixDatagram,
[INFO] [stdout]    |     ^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `SocketServer` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function `bind` is never used
[INFO] [stdout]   --> src/socket.rs:41:12
[INFO] [stdout]    |
[INFO] [stdout] 41 |     pub fn bind(config: &DaemonConfig) -> Result<Self> {
[INFO] [stdout]    |            ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function `wait` is never used
[INFO] [stdout]   --> src/socket.rs:47:12
[INFO] [stdout]    |
[INFO] [stdout] 47 |     pub fn wait(&self) -> Result<()> {
[INFO] [stdout]    |            ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function `respond` is never used
[INFO] [stdout]   --> src/socket.rs:58:8
[INFO] [stdout]    |
[INFO] [stdout] 58 |     fn respond(&self, command: &mut str) -> Result<&'static str> {
[INFO] [stdout]    |        ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function `set_recommend` is never used
[INFO] [stdout]   --> src/socket.rs:72:8
[INFO] [stdout]    |
[INFO] [stdout] 72 |     fn set_recommend(&self, arg: &mut str) -> &'static str {
[INFO] [stdout]    |        ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `empty_mut_str` is never used
[INFO] [stdout]   --> src/utils.rs:29:8
[INFO] [stdout]    |
[INFO] [stdout] 29 | pub fn empty_mut_str() -> &'static mut str {
[INFO] [stdout]    |        ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `sigmoid` is never used
[INFO] [stdout]   --> src/utils.rs:34:8
[INFO] [stdout]    |
[INFO] [stdout] 34 | pub fn sigmoid(n: f32) -> f32 {
[INFO] [stdout]    |        ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `random_key` is never used
[INFO] [stdout]   --> src/choose.rs:29:8
[INFO] [stdout]    |
[INFO] [stdout] 29 | pub fn random_key<'a, K: Eq + Hash, V>(map: &'a HashMap<K, V>, rng: &mut Rng) -> Option<&'a K> {
[INFO] [stdout]    |        ^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `roulette_wheel` is never used
[INFO] [stdout]   --> src/choose.rs:34:8
[INFO] [stdout]    |
[INFO] [stdout] 34 | pub fn roulette_wheel<'a, K: Eq + Hash>(map: &'a HashMap<K, f32>, rng: &mut Rng) -> Option<&'a K> {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function `modify_weight` is never used
[INFO] [stdout]   --> src/markov.rs:47:12
[INFO] [stdout]    |
[INFO] [stdout] 47 |     pub fn modify_weight(&mut self, prev: T, next: T, diff: f32) {
[INFO] [stdout]    |            ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function `clear` is never used
[INFO] [stdout]   --> src/markov.rs:55:12
[INFO] [stdout]    |
[INFO] [stdout] 55 |     pub fn clear<U>(&mut self, item: &U)
[INFO] [stdout]    |            ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function `start` is never used
[INFO] [stdout]   --> src/markov.rs:64:12
[INFO] [stdout]    |
[INFO] [stdout] 64 |     pub fn start(&self, rng: &mut Rng) -> Option<&T> {
[INFO] [stdout]    |            ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function `next` is never used
[INFO] [stdout]   --> src/markov.rs:68:12
[INFO] [stdout]    |
[INFO] [stdout] 68 |     pub fn next<U>(&self, current: &U, rng: &mut Rng) -> Option<&T>
[INFO] [stdout]    |            ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function `possible_next` is never used
[INFO] [stdout]   --> src/markov.rs:78:12
[INFO] [stdout]    |
[INFO] [stdout] 78 |     pub fn possible_next<U>(&self, current: &U) -> Option<&HashMap<T, f32>>
[INFO] [stdout]    |            ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `split_cmd` is never used
[INFO] [stdout]   --> src/socket.rs:28:4
[INFO] [stdout]    |
[INFO] [stdout] 28 | fn split_cmd(command: &mut str) -> (&mut str, &mut str) {
[INFO] [stdout]    |    ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `socket` is never read
[INFO] [stdout]   --> src/socket.rs:37:5
[INFO] [stdout]    |
[INFO] [stdout] 36 | pub struct SocketServer {
[INFO] [stdout]    |            ------------ field in this struct
[INFO] [stdout] 37 |     socket: UnixDatagram,
[INFO] [stdout]    |     ^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `SocketServer` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function `bind` is never used
[INFO] [stdout]   --> src/socket.rs:41:12
[INFO] [stdout]    |
[INFO] [stdout] 41 |     pub fn bind(config: &DaemonConfig) -> Result<Self> {
[INFO] [stdout]    |            ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function `wait` is never used
[INFO] [stdout]   --> src/socket.rs:47:12
[INFO] [stdout]    |
[INFO] [stdout] 47 |     pub fn wait(&self) -> Result<()> {
[INFO] [stdout]    |            ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function `respond` is never used
[INFO] [stdout]   --> src/socket.rs:58:8
[INFO] [stdout]    |
[INFO] [stdout] 58 |     fn respond(&self, command: &mut str) -> Result<&'static str> {
[INFO] [stdout]    |        ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function `set_recommend` is never used
[INFO] [stdout]   --> src/socket.rs:72:8
[INFO] [stdout]    |
[INFO] [stdout] 72 |     fn set_recommend(&self, arg: &mut str) -> &'static str {
[INFO] [stdout]    |        ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `empty_mut_str` is never used
[INFO] [stdout]   --> src/utils.rs:29:8
[INFO] [stdout]    |
[INFO] [stdout] 29 | pub fn empty_mut_str() -> &'static mut str {
[INFO] [stdout]    |        ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `sigmoid` is never used
[INFO] [stdout]   --> src/utils.rs:34:8
[INFO] [stdout]    |
[INFO] [stdout] 34 | pub fn sigmoid(n: f32) -> f32 {
[INFO] [stdout]    |        ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 31 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 31 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 16.46s
[INFO] running `Command { std: "docker" "inspect" "ae843de7d2cf387bc5e75e44e524e8495eb090b391cc37845c5c30976d7104f4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ae843de7d2cf387bc5e75e44e524e8495eb090b391cc37845c5c30976d7104f4", kill_on_drop: false }`
[INFO] [stdout] ae843de7d2cf387bc5e75e44e524e8495eb090b391cc37845c5c30976d7104f4