[INFO] cloning repository https://github.com/letaron/tacron
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/letaron/tacron" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fletaron%2Ftacron", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fletaron%2Ftacron'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 80c7a770b45d2f7d5d177182307f193b17a16c6f
[INFO] checking letaron/tacron against try#a0cd57eba5d417638d3351ba13fc414ad1a24bec for pr-134688
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fletaron%2Ftacron" "/workspace/builds/worker-4-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-4-tc2/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/letaron/tacron on toolchain a0cd57eba5d417638d3351ba13fc414ad1a24bec
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+a0cd57eba5d417638d3351ba13fc414ad1a24bec" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/letaron/tacron
[INFO] finished tweaking git repo https://github.com/letaron/tacron
[INFO] tweaked toml for git repo https://github.com/letaron/tacron written to /workspace/builds/worker-4-tc2/source/Cargo.toml
[INFO] crate git repo https://github.com/letaron/tacron already has a lockfile, it will not be regenerated
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+a0cd57eba5d417638d3351ba13fc414ad1a24bec" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/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:f3a9d4ad9d972b27faf3965f35b62e55ba32bbce8f20bc8fe909558a86702fde" "/opt/rustwide/cargo-home/bin/cargo" "+a0cd57eba5d417638d3351ba13fc414ad1a24bec" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] bd2e2030c393caa6ad5f61aaa9cec035555d25380220f5e96eb0785b8faa095e
[INFO] running `Command { std: "docker" "start" "-a" "bd2e2030c393caa6ad5f61aaa9cec035555d25380220f5e96eb0785b8faa095e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "bd2e2030c393caa6ad5f61aaa9cec035555d25380220f5e96eb0785b8faa095e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "bd2e2030c393caa6ad5f61aaa9cec035555d25380220f5e96eb0785b8faa095e", kill_on_drop: false }`
[INFO] [stdout] bd2e2030c393caa6ad5f61aaa9cec035555d25380220f5e96eb0785b8faa095e
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/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:f3a9d4ad9d972b27faf3965f35b62e55ba32bbce8f20bc8fe909558a86702fde" "/opt/rustwide/cargo-home/bin/cargo" "+a0cd57eba5d417638d3351ba13fc414ad1a24bec" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] ed6ada6696108ac9b966e3e81f043a53af2cc034bb64ddb5d766e2453a3e54cd
[INFO] running `Command { std: "docker" "start" "-a" "ed6ada6696108ac9b966e3e81f043a53af2cc034bb64ddb5d766e2453a3e54cd", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.49
[INFO] [stderr]    Compiling memchr v2.2.0
[INFO] [stderr]    Compiling num-traits v0.2.6
[INFO] [stderr]    Compiling num-integer v0.1.39
[INFO] [stderr]    Compiling regex v1.1.2
[INFO] [stderr]     Checking ucd-util v0.1.3
[INFO] [stderr]     Checking lazy_static v1.3.0
[INFO] [stderr]     Checking linked-hash-map v0.5.1
[INFO] [stderr]     Checking arc-swap v0.3.7
[INFO] [stderr]     Checking utf8-ranges v1.0.2
[INFO] [stderr]     Checking thread_local v0.3.6
[INFO] [stderr]     Checking regex-syntax v0.6.5
[INFO] [stderr]     Checking yaml-rust v0.4.3
[INFO] [stderr]     Checking aho-corasick v0.6.10
[INFO] [stderr]     Checking time v0.1.42
[INFO] [stderr]     Checking signal-hook v0.1.8
[INFO] [stderr]     Checking chrono v0.4.6
[INFO] [stderr]     Checking tacron v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/main.rs:66:40
[INFO] [stdout]    |
[INFO] [stdout] 66 | fn add_sighup_handler(readers: Vec<Box<Reader + Sync + Send>>, tacrons: Arc<RwLock<Vec<TaCron>>>) {
[INFO] [stdout]    |                                        ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2018) 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]    = note: `#[warn(bare_trait_objects)]` on by default
[INFO] [stdout] help: if this is a dyn-compatible trait, use `dyn`
[INFO] [stdout]    |
[INFO] [stdout] 66 | fn add_sighup_handler(readers: Vec<Box<dyn Reader + Sync + Send>>, tacrons: Arc<RwLock<Vec<TaCron>>>) {
[INFO] [stdout]    |                                        +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/main.rs:66:40
[INFO] [stdout]    |
[INFO] [stdout] 66 | fn add_sighup_handler(readers: Vec<Box<Reader + Sync + Send>>, tacrons: Arc<RwLock<Vec<TaCron>>>) {
[INFO] [stdout]    |                                        ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2018) 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]    = note: `#[warn(bare_trait_objects)]` on by default
[INFO] [stdout] help: if this is a dyn-compatible trait, use `dyn`
[INFO] [stdout]    |
[INFO] [stdout] 66 | fn add_sighup_handler(readers: Vec<Box<dyn Reader + Sync + Send>>, tacrons: Arc<RwLock<Vec<TaCron>>>) {
[INFO] [stdout]    |                                        +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/reader/mod.rs:30:14
[INFO] [stdout]    |
[INFO] [stdout] 30 | ) -> Vec<Box<Reader + Sync + Send>> {
[INFO] [stdout]    |              ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2018) 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: if this is a dyn-compatible trait, use `dyn`
[INFO] [stdout]    |
[INFO] [stdout] 30 | ) -> Vec<Box<dyn Reader + Sync + Send>> {
[INFO] [stdout]    |              +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/reader/mod.rs:30:14
[INFO] [stdout]    |
[INFO] [stdout] 30 | ) -> Vec<Box<Reader + Sync + Send>> {
[INFO] [stdout]    |              ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2018) 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: if this is a dyn-compatible trait, use `dyn`
[INFO] [stdout]    |
[INFO] [stdout] 30 | ) -> Vec<Box<dyn Reader + Sync + Send>> {
[INFO] [stdout]    |              +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/reader/mod.rs:49:43
[INFO] [stdout]    |
[INFO] [stdout] 49 | pub fn retrieve_tacrons(readers: &Vec<Box<Reader + Sync + Send>>) -> Vec<TaCron> {
[INFO] [stdout]    |                                           ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2018) 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: if this is a dyn-compatible trait, use `dyn`
[INFO] [stdout]    |
[INFO] [stdout] 49 | pub fn retrieve_tacrons(readers: &Vec<Box<dyn Reader + Sync + Send>>) -> Vec<TaCron> {
[INFO] [stdout]    |                                           +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/reader/mod.rs:49:43
[INFO] [stdout]    |
[INFO] [stdout] 49 | pub fn retrieve_tacrons(readers: &Vec<Box<Reader + Sync + Send>>) -> Vec<TaCron> {
[INFO] [stdout]    |                                           ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2018) 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: if this is a dyn-compatible trait, use `dyn`
[INFO] [stdout]    |
[INFO] [stdout] 49 | pub fn retrieve_tacrons(readers: &Vec<Box<dyn Reader + Sync + Send>>) -> Vec<TaCron> {
[INFO] [stdout]    |                                           +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/reader/crontab_reader.rs:48:27
[INFO] [stdout]    |
[INFO] [stdout] 48 |     readers: &mut Vec<Box<Reader + Sync + Send>>, users: &Vec<String>,
[INFO] [stdout]    |                           ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2018) 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: if this is a dyn-compatible trait, use `dyn`
[INFO] [stdout]    |
[INFO] [stdout] 48 |     readers: &mut Vec<Box<dyn Reader + Sync + Send>>, users: &Vec<String>,
[INFO] [stdout]    |                           +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/reader/crontab_reader.rs:48:27
[INFO] [stdout]    |
[INFO] [stdout] 48 |     readers: &mut Vec<Box<Reader + Sync + Send>>, users: &Vec<String>,
[INFO] [stdout]    |                           ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2018) 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: if this is a dyn-compatible trait, use `dyn`
[INFO] [stdout]    |
[INFO] [stdout] 48 |     readers: &mut Vec<Box<dyn Reader + Sync + Send>>, users: &Vec<String>,
[INFO] [stdout]    |                           +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/reader/file_reader.rs:81:27
[INFO] [stdout]    |
[INFO] [stdout] 81 |     readers: &mut Vec<Box<Reader + Sync + Send>>, crontabs: &Vec<String>,
[INFO] [stdout]    |                           ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2018) 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: if this is a dyn-compatible trait, use `dyn`
[INFO] [stdout]    |
[INFO] [stdout] 81 |     readers: &mut Vec<Box<dyn Reader + Sync + Send>>, crontabs: &Vec<String>,
[INFO] [stdout]    |                           +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/reader/file_reader.rs:81:27
[INFO] [stdout]    |
[INFO] [stdout] 81 |     readers: &mut Vec<Box<Reader + Sync + Send>>, crontabs: &Vec<String>,
[INFO] [stdout]    |                           ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2018) 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: if this is a dyn-compatible trait, use `dyn`
[INFO] [stdout]    |
[INFO] [stdout] 81 |     readers: &mut Vec<Box<dyn Reader + Sync + Send>>, crontabs: &Vec<String>,
[INFO] [stdout]    |                           +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/reader/mod.rs:31:30
[INFO] [stdout]    |
[INFO] [stdout] 31 |     let mut readers: Vec<Box<Reader + Sync + Send>> = Vec::new();
[INFO] [stdout]    |                              ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2018) 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: if this is a dyn-compatible trait, use `dyn`
[INFO] [stdout]    |
[INFO] [stdout] 31 |     let mut readers: Vec<Box<dyn Reader + Sync + Send>> = Vec::new();
[INFO] [stdout]    |                              +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/reader/mod.rs:35:26
[INFO] [stdout]    |
[INFO] [stdout] 35 |         fn(&mut Vec<Box<(Reader + Send + Sync)>>, &Vec<String>),
[INFO] [stdout]    |                          ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2018) 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: if this is a dyn-compatible trait, use `dyn`
[INFO] [stdout]    |
[INFO] [stdout] 35 |         fn(&mut Vec<Box<(dyn Reader + Send + Sync)>>, &Vec<String>),
[INFO] [stdout]    |                          +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/reader/file_reader.rs:125:34
[INFO] [stdout]     |
[INFO] [stdout] 125 |         let mut readers: Vec<Box<Reader + Sync + Send>> = Vec::new();
[INFO] [stdout]     |                                  ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this is accepted in the current edition (Rust 2018) 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: if this is a dyn-compatible trait, use `dyn`
[INFO] [stdout]     |
[INFO] [stdout] 125 |         let mut readers: Vec<Box<dyn Reader + Sync + Send>> = Vec::new();
[INFO] [stdout]     |                                  +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/reader/mod.rs:31:30
[INFO] [stdout]    |
[INFO] [stdout] 31 |     let mut readers: Vec<Box<Reader + Sync + Send>> = Vec::new();
[INFO] [stdout]    |                              ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2018) 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: if this is a dyn-compatible trait, use `dyn`
[INFO] [stdout]    |
[INFO] [stdout] 31 |     let mut readers: Vec<Box<dyn Reader + Sync + Send>> = Vec::new();
[INFO] [stdout]    |                              +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/reader/mod.rs:35:26
[INFO] [stdout]    |
[INFO] [stdout] 35 |         fn(&mut Vec<Box<(Reader + Send + Sync)>>, &Vec<String>),
[INFO] [stdout]    |                          ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2018) 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: if this is a dyn-compatible trait, use `dyn`
[INFO] [stdout]    |
[INFO] [stdout] 35 |         fn(&mut Vec<Box<(dyn Reader + Send + Sync)>>, &Vec<String>),
[INFO] [stdout]    |                          +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/main.rs:51:26
[INFO] [stdout]    |
[INFO] [stdout] 51 |     let readers: Vec<Box<Reader + Sync + Send>>;
[INFO] [stdout]    |                          ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2018) 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: if this is a dyn-compatible trait, use `dyn`
[INFO] [stdout]    |
[INFO] [stdout] 51 |     let readers: Vec<Box<dyn Reader + Sync + Send>>;
[INFO] [stdout]    |                          +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/main.rs:51:26
[INFO] [stdout]    |
[INFO] [stdout] 51 |     let readers: Vec<Box<Reader + Sync + Send>>;
[INFO] [stdout]    |                          ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2018) 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: if this is a dyn-compatible trait, use `dyn`
[INFO] [stdout]    |
[INFO] [stdout] 51 |     let readers: Vec<Box<dyn Reader + Sync + Send>>;
[INFO] [stdout]    |                          +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused return value of `Result::<T, E>::is_err` that must be used
[INFO] [stdout]   --> src/time_units/days_of_week.rs:63:9
[INFO] [stdout]    |
[INFO] [stdout] 63 |         DaysOfWeek::value_from_name("foo").is_err();
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: if you intended to assert that this is err, consider `.unwrap_err()` instead
[INFO] [stdout]    = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]    |
[INFO] [stdout] 63 |         let _ = DaysOfWeek::value_from_name("foo").is_err();
[INFO] [stdout]    |         +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused return value of `Result::<T, E>::is_err` that must be used
[INFO] [stdout]   --> src/time_units/months.rs:73:9
[INFO] [stdout]    |
[INFO] [stdout] 73 |         Months::value_from_name("foo").is_err();
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: if you intended to assert that this is err, consider `.unwrap_err()` instead
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]    |
[INFO] [stdout] 73 |         let _ = Months::value_from_name("foo").is_err();
[INFO] [stdout]    |         +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 3.10s
[INFO] running `Command { std: "docker" "inspect" "ed6ada6696108ac9b966e3e81f043a53af2cc034bb64ddb5d766e2453a3e54cd", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ed6ada6696108ac9b966e3e81f043a53af2cc034bb64ddb5d766e2453a3e54cd", kill_on_drop: false }`
[INFO] [stdout] ed6ada6696108ac9b966e3e81f043a53af2cc034bb64ddb5d766e2453a3e54cd