[INFO] fetching crate earley 0.1.0...
[INFO] testing earley-0.1.0 against beta-2022-02-22 for beta-1.60-1
[INFO] extracting crate earley 0.1.0 into /workspace/builds/worker-13/source
[INFO] validating manifest of crates.io crate earley 0.1.0 on toolchain beta-2022-02-22
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2022-02-22" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate earley 0.1.0
[INFO] finished tweaking crates.io crate earley 0.1.0
[INFO] tweaked toml for crates.io crate earley 0.1.0 written to /workspace/builds/worker-13/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2022-02-22" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2022-02-22" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-13/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-13/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@sha256:0cd99ca24d8e8c98e67c542213511d985b8778b5bdcbb160e038429496686047" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2022-02-22" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 1dd25c727245ab158865efdb0e1e40978d73b57b67af69477be8b34a16e1736c
[INFO] running `Command { std: "docker" "start" "-a" "1dd25c727245ab158865efdb0e1e40978d73b57b67af69477be8b34a16e1736c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "1dd25c727245ab158865efdb0e1e40978d73b57b67af69477be8b34a16e1736c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1dd25c727245ab158865efdb0e1e40978d73b57b67af69477be8b34a16e1736c", kill_on_drop: false }`
[INFO] [stdout] 1dd25c727245ab158865efdb0e1e40978d73b57b67af69477be8b34a16e1736c
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-13/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-13/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=warn" "-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@sha256:0cd99ca24d8e8c98e67c542213511d985b8778b5bdcbb160e038429496686047" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2022-02-22" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 7bca1d3d5bbd4f61d71d1e2896645988cf3e79f03f76c220cf5d8123c3f0f222
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "7bca1d3d5bbd4f61d71d1e2896645988cf3e79f03f76c220cf5d8123c3f0f222", kill_on_drop: false }`
[INFO] [stderr]    Compiling earley v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/item_table.rs:108:13
[INFO] [stdout]     |
[INFO] [stdout] 108 |             try!(format!("{:=^80}\n", format!(" {} ", index)).fmt(f));
[INFO] [stdout]     |             ^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(deprecated)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/item_table.rs:110:17
[INFO] [stdout]     |
[INFO] [stdout] 110 |                 try!(format!("{:<60} {:?}\n", item, item.get_operation()).fmt(f));
[INFO] [stdout]     |                 ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]  --> src/grammar/rule.rs:6:26
[INFO] [stdout]   |
[INFO] [stdout] 6 |     productions: Vec<Box<Production<T>>>,
[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] 6 -     productions: Vec<Box<Production<T>>>,
[INFO] [stdout] 6 +     productions: Vec<Box<dyn Production<T>>>,
[INFO] [stdout]   | 
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/item.rs:16:21
[INFO] [stdout]    |
[INFO] [stdout] 16 |     production: &'a Production<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] 16 -     production: &'a Production<T>,
[INFO] [stdout] 16 +     production: &'a dyn Production<T>,
[INFO] [stdout]    | 
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/grammar/mod.rs:20:37
[INFO] [stdout]    |
[INFO] [stdout] 20 |     pub fn new(productions: Vec<Box<Production<T>>>) -> Grammar<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] 20 -     pub fn new(productions: Vec<Box<Production<T>>>) -> Grammar<T> {
[INFO] [stdout] 20 +     pub fn new(productions: Vec<Box<dyn Production<T>>>) -> Grammar<T> {
[INFO] [stdout]    | 
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/grammar/mod.rs:47:58
[INFO] [stdout]    |
[INFO] [stdout] 47 |     pub fn productions_for_starting_rule(&self) -> &[Box<Production<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] 47 -     pub fn productions_for_starting_rule(&self) -> &[Box<Production<T>>] {
[INFO] [stdout] 47 +     pub fn productions_for_starting_rule(&self) -> &[Box<dyn Production<T>>] {
[INFO] [stdout]    | 
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/grammar/mod.rs:51:56
[INFO] [stdout]    |
[INFO] [stdout] 51 |     pub fn productions_for(&self, name: &str) -> &[Box<Production<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] 51 -     pub fn productions_for(&self, name: &str) -> &[Box<Production<T>>] {
[INFO] [stdout] 51 +     pub fn productions_for(&self, name: &str) -> &[Box<dyn Production<T>>] {
[INFO] [stdout]    | 
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/item.rs:42:36
[INFO] [stdout]    |
[INFO] [stdout] 42 |     pub fn predict(production: &'a Production<T>, start: usize) -> Item<'a, 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] 42 -     pub fn predict(production: &'a Production<T>, start: usize) -> Item<'a, T> {
[INFO] [stdout] 42 +     pub fn predict(production: &'a dyn Production<T>, start: usize) -> Item<'a, T> {
[INFO] [stdout]    | 
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/grammar/production.rs:12:31
[INFO] [stdout]    |
[INFO] [stdout] 12 | impl<'a, T> PartialEq for &'a Production<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] 12 - impl<'a, T> PartialEq for &'a Production<T> {
[INFO] [stdout] 12 + impl<'a, T> PartialEq for &'a dyn Production<T> {
[INFO] [stdout]    | 
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/grammar/production.rs:18:24
[INFO] [stdout]    |
[INFO] [stdout] 18 | impl<'a, T> Eq for &'a Production<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] 18 - impl<'a, T> Eq for &'a Production<T> {}
[INFO] [stdout] 18 + impl<'a, T> Eq for &'a dyn Production<T> {}
[INFO] [stdout]    | 
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/grammar/rule.rs:11:57
[INFO] [stdout]    |
[INFO] [stdout] 11 |     pub fn new(name: &'static str, productions: Vec<Box<Production<T>>>) -> Rule<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] 11 -     pub fn new(name: &'static str, productions: Vec<Box<Production<T>>>) -> Rule<T> {
[INFO] [stdout] 11 +     pub fn new(name: &'static str, productions: Vec<Box<dyn Production<T>>>) -> Rule<T> {
[INFO] [stdout]    | 
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/grammar/rule.rs:23:44
[INFO] [stdout]    |
[INFO] [stdout] 23 |     pub fn get_productions(&self) -> &[Box<Production<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] 23 -     pub fn get_productions(&self) -> &[Box<Production<T>>] {
[INFO] [stdout] 23 +     pub fn get_productions(&self) -> &[Box<dyn Production<T>>] {
[INFO] [stdout]    | 
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/item_table.rs:88:21
[INFO] [stdout]    |
[INFO] [stdout] 88 |         if let Some(mut items) = self.table.get_mut(index) {
[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: 13 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.62s
[INFO] running `Command { std: "docker" "inspect" "7bca1d3d5bbd4f61d71d1e2896645988cf3e79f03f76c220cf5d8123c3f0f222", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "7bca1d3d5bbd4f61d71d1e2896645988cf3e79f03f76c220cf5d8123c3f0f222", kill_on_drop: false }`
[INFO] [stdout] 7bca1d3d5bbd4f61d71d1e2896645988cf3e79f03f76c220cf5d8123c3f0f222
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-13/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-13/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=warn" "-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@sha256:0cd99ca24d8e8c98e67c542213511d985b8778b5bdcbb160e038429496686047" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2022-02-22" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] c510e2c0fc449ac01d04d1e618124a552938caa1c3fdf35fdcc123e1b6a9304e
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "c510e2c0fc449ac01d04d1e618124a552938caa1c3fdf35fdcc123e1b6a9304e", kill_on_drop: false }`
[INFO] [stderr]    Compiling env_logger v0.9.0
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/item_table.rs:108:13
[INFO] [stdout]     |
[INFO] [stdout] 108 |             try!(format!("{:=^80}\n", format!(" {} ", index)).fmt(f));
[INFO] [stdout]     |             ^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(deprecated)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/item_table.rs:110:17
[INFO] [stdout]     |
[INFO] [stdout] 110 |                 try!(format!("{:<60} {:?}\n", item, item.get_operation()).fmt(f));
[INFO] [stdout]     |                 ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]  --> src/grammar/rule.rs:6:26
[INFO] [stdout]   |
[INFO] [stdout] 6 |     productions: Vec<Box<Production<T>>>,
[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] 6 -     productions: Vec<Box<Production<T>>>,
[INFO] [stdout] 6 +     productions: Vec<Box<dyn Production<T>>>,
[INFO] [stdout]   | 
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/item.rs:16:21
[INFO] [stdout]    |
[INFO] [stdout] 16 |     production: &'a Production<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] 16 -     production: &'a Production<T>,
[INFO] [stdout] 16 +     production: &'a dyn Production<T>,
[INFO] [stdout]    | 
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/grammar/mod.rs:20:37
[INFO] [stdout]    |
[INFO] [stdout] 20 |     pub fn new(productions: Vec<Box<Production<T>>>) -> Grammar<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] 20 -     pub fn new(productions: Vec<Box<Production<T>>>) -> Grammar<T> {
[INFO] [stdout] 20 +     pub fn new(productions: Vec<Box<dyn Production<T>>>) -> Grammar<T> {
[INFO] [stdout]    | 
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/grammar/mod.rs:47:58
[INFO] [stdout]    |
[INFO] [stdout] 47 |     pub fn productions_for_starting_rule(&self) -> &[Box<Production<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] 47 -     pub fn productions_for_starting_rule(&self) -> &[Box<Production<T>>] {
[INFO] [stdout] 47 +     pub fn productions_for_starting_rule(&self) -> &[Box<dyn Production<T>>] {
[INFO] [stdout]    | 
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/grammar/mod.rs:51:56
[INFO] [stdout]    |
[INFO] [stdout] 51 |     pub fn productions_for(&self, name: &str) -> &[Box<Production<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] 51 -     pub fn productions_for(&self, name: &str) -> &[Box<Production<T>>] {
[INFO] [stdout] 51 +     pub fn productions_for(&self, name: &str) -> &[Box<dyn Production<T>>] {
[INFO] [stdout]    | 
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/item.rs:42:36
[INFO] [stdout]    |
[INFO] [stdout] 42 |     pub fn predict(production: &'a Production<T>, start: usize) -> Item<'a, 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] 42 -     pub fn predict(production: &'a Production<T>, start: usize) -> Item<'a, T> {
[INFO] [stdout] 42 +     pub fn predict(production: &'a dyn Production<T>, start: usize) -> Item<'a, T> {
[INFO] [stdout]    | 
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/grammar/production.rs:12:31
[INFO] [stdout]    |
[INFO] [stdout] 12 | impl<'a, T> PartialEq for &'a Production<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] 12 - impl<'a, T> PartialEq for &'a Production<T> {
[INFO] [stdout] 12 + impl<'a, T> PartialEq for &'a dyn Production<T> {
[INFO] [stdout]    | 
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/grammar/production.rs:18:24
[INFO] [stdout]    |
[INFO] [stdout] 18 | impl<'a, T> Eq for &'a Production<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] 18 - impl<'a, T> Eq for &'a Production<T> {}
[INFO] [stdout] 18 + impl<'a, T> Eq for &'a dyn Production<T> {}
[INFO] [stdout]    | 
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/grammar/rule.rs:11:57
[INFO] [stdout]    |
[INFO] [stdout] 11 |     pub fn new(name: &'static str, productions: Vec<Box<Production<T>>>) -> Rule<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] 11 -     pub fn new(name: &'static str, productions: Vec<Box<Production<T>>>) -> Rule<T> {
[INFO] [stdout] 11 +     pub fn new(name: &'static str, productions: Vec<Box<dyn Production<T>>>) -> Rule<T> {
[INFO] [stdout]    | 
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/grammar/rule.rs:23:44
[INFO] [stdout]    |
[INFO] [stdout] 23 |     pub fn get_productions(&self) -> &[Box<Production<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] 23 -     pub fn get_productions(&self) -> &[Box<Production<T>>] {
[INFO] [stdout] 23 +     pub fn get_productions(&self) -> &[Box<dyn Production<T>>] {
[INFO] [stdout]    | 
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/item_table.rs:88:21
[INFO] [stdout]    |
[INFO] [stdout] 88 |         if let Some(mut items) = self.table.get_mut(index) {
[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: 13 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]    Compiling earley v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused `#[macro_use]` import
[INFO] [stdout]  --> tests/basic.rs:1:1
[INFO] [stdout]   |
[INFO] [stdout] 1 | #[macro_use]
[INFO] [stdout]   | ^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `#[macro_use]` import
[INFO] [stdout]  --> tests/rules.rs:1:1
[INFO] [stdout]   |
[INFO] [stdout] 1 | #[macro_use]
[INFO] [stdout]   | ^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `#[macro_use]` import
[INFO] [stdout]  --> tests/empty_rules.rs:1:1
[INFO] [stdout]   |
[INFO] [stdout] 1 | #[macro_use]
[INFO] [stdout]   | ^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]  --> tests/basic.rs:7:30
[INFO] [stdout]   |
[INFO] [stdout] 7 |     let productions: Vec<Box<Production<u32>>> = vec![
[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] 7 -     let productions: Vec<Box<Production<u32>>> = vec![
[INFO] [stdout] 7 +     let productions: Vec<Box<dyn Production<u32>>> = vec![
[INFO] [stdout]   | 
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]  --> tests/empty_rules.rs:7:30
[INFO] [stdout]   |
[INFO] [stdout] 7 |     let productions: Vec<Box<Production<String>>> = vec![
[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] 7 -     let productions: Vec<Box<Production<String>>> = vec![
[INFO] [stdout] 7 +     let productions: Vec<Box<dyn Production<String>>> = vec![
[INFO] [stdout]   | 
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `#[macro_use]` import
[INFO] [stdout]  --> tests/nullability.rs:1:1
[INFO] [stdout]   |
[INFO] [stdout] 1 | #[macro_use]
[INFO] [stdout]   | ^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]  --> tests/rules.rs:7:30
[INFO] [stdout]   |
[INFO] [stdout] 7 |     let productions: Vec<Box<Production<u32>>> = vec![
[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] 7 -     let productions: Vec<Box<Production<u32>>> = vec![
[INFO] [stdout] 7 +     let productions: Vec<Box<dyn Production<u32>>> = vec![
[INFO] [stdout]   | 
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]  --> tests/nullability.rs:7:30
[INFO] [stdout]   |
[INFO] [stdout] 7 |     let productions: Vec<Box<Production<u32>>> = vec![
[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] 7 -     let productions: Vec<Box<Production<u32>>> = vec![
[INFO] [stdout] 7 +     let productions: Vec<Box<dyn Production<u32>>> = vec![
[INFO] [stdout]   | 
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/item_table.rs:108:13
[INFO] [stdout]     |
[INFO] [stdout] 108 |             try!(format!("{:=^80}\n", format!(" {} ", index)).fmt(f));
[INFO] [stdout]     |             ^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(deprecated)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/item_table.rs:110:17
[INFO] [stdout]     |
[INFO] [stdout] 110 |                 try!(format!("{:<60} {:?}\n", item, item.get_operation()).fmt(f));
[INFO] [stdout]     |                 ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]  --> src/grammar/rule.rs:6:26
[INFO] [stdout]   |
[INFO] [stdout] 6 |     productions: Vec<Box<Production<T>>>,
[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] 6 -     productions: Vec<Box<Production<T>>>,
[INFO] [stdout] 6 +     productions: Vec<Box<dyn Production<T>>>,
[INFO] [stdout]   | 
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/item.rs:16:21
[INFO] [stdout]    |
[INFO] [stdout] 16 |     production: &'a Production<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] 16 -     production: &'a Production<T>,
[INFO] [stdout] 16 +     production: &'a dyn Production<T>,
[INFO] [stdout]    | 
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/grammar/mod.rs:20:37
[INFO] [stdout]    |
[INFO] [stdout] 20 |     pub fn new(productions: Vec<Box<Production<T>>>) -> Grammar<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] 20 -     pub fn new(productions: Vec<Box<Production<T>>>) -> Grammar<T> {
[INFO] [stdout] 20 +     pub fn new(productions: Vec<Box<dyn Production<T>>>) -> Grammar<T> {
[INFO] [stdout]    | 
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/grammar/mod.rs:47:58
[INFO] [stdout]    |
[INFO] [stdout] 47 |     pub fn productions_for_starting_rule(&self) -> &[Box<Production<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] 47 -     pub fn productions_for_starting_rule(&self) -> &[Box<Production<T>>] {
[INFO] [stdout] 47 +     pub fn productions_for_starting_rule(&self) -> &[Box<dyn Production<T>>] {
[INFO] [stdout]    | 
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/grammar/mod.rs:51:56
[INFO] [stdout]    |
[INFO] [stdout] 51 |     pub fn productions_for(&self, name: &str) -> &[Box<Production<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] 51 -     pub fn productions_for(&self, name: &str) -> &[Box<Production<T>>] {
[INFO] [stdout] 51 +     pub fn productions_for(&self, name: &str) -> &[Box<dyn Production<T>>] {
[INFO] [stdout]    | 
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/item.rs:42:36
[INFO] [stdout]    |
[INFO] [stdout] 42 |     pub fn predict(production: &'a Production<T>, start: usize) -> Item<'a, 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] 42 -     pub fn predict(production: &'a Production<T>, start: usize) -> Item<'a, T> {
[INFO] [stdout] 42 +     pub fn predict(production: &'a dyn Production<T>, start: usize) -> Item<'a, T> {
[INFO] [stdout]    | 
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/grammar/production.rs:12:31
[INFO] [stdout]    |
[INFO] [stdout] 12 | impl<'a, T> PartialEq for &'a Production<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] 12 - impl<'a, T> PartialEq for &'a Production<T> {
[INFO] [stdout] 12 + impl<'a, T> PartialEq for &'a dyn Production<T> {
[INFO] [stdout]    | 
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/grammar/production.rs:18:24
[INFO] [stdout]    |
[INFO] [stdout] 18 | impl<'a, T> Eq for &'a Production<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] 18 - impl<'a, T> Eq for &'a Production<T> {}
[INFO] [stdout] 18 + impl<'a, T> Eq for &'a dyn Production<T> {}
[INFO] [stdout]    | 
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/grammar/rule.rs:11:57
[INFO] [stdout]    |
[INFO] [stdout] 11 |     pub fn new(name: &'static str, productions: Vec<Box<Production<T>>>) -> Rule<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] 11 -     pub fn new(name: &'static str, productions: Vec<Box<Production<T>>>) -> Rule<T> {
[INFO] [stdout] 11 +     pub fn new(name: &'static str, productions: Vec<Box<dyn Production<T>>>) -> Rule<T> {
[INFO] [stdout]    | 
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/grammar/rule.rs:23:44
[INFO] [stdout]    |
[INFO] [stdout] 23 |     pub fn get_productions(&self) -> &[Box<Production<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] 23 -     pub fn get_productions(&self) -> &[Box<Production<T>>] {
[INFO] [stdout] 23 +     pub fn get_productions(&self) -> &[Box<dyn Production<T>>] {
[INFO] [stdout]    | 
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `#[macro_use]` import
[INFO] [stdout]  --> examples/basic.rs:1:1
[INFO] [stdout]   |
[INFO] [stdout] 1 | #[macro_use]
[INFO] [stdout]   | ^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0599]: no method named `unwrap` found for unit type `()` in the current scope
[INFO] [stdout]  --> examples/basic.rs:8:24
[INFO] [stdout]   |
[INFO] [stdout] 8 |     env_logger::init().unwrap();
[INFO] [stdout]   |                        ^^^^^^ method not found in `()`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to previous error; 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0599`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `earley` due to 2 previous errors; 1 warning emitted
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/item_table.rs:88:21
[INFO] [stdout]    |
[INFO] [stdout] 88 |         if let Some(mut items) = self.table.get_mut(index) {
[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: 13 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: build failed
[INFO] running `Command { std: "docker" "inspect" "c510e2c0fc449ac01d04d1e618124a552938caa1c3fdf35fdcc123e1b6a9304e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c510e2c0fc449ac01d04d1e618124a552938caa1c3fdf35fdcc123e1b6a9304e", kill_on_drop: false }`
[INFO] [stdout] c510e2c0fc449ac01d04d1e618124a552938caa1c3fdf35fdcc123e1b6a9304e