[INFO] cloning repository https://github.com/rookie1024/Spin
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/rookie1024/Spin" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Frookie1024%2FSpin", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Frookie1024%2FSpin'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 31597733f79cf0b07d82812821b4105ee2b79108
[INFO] checking rookie1024/Spin against beta-2021-10-15 for beta-1.56-3
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Frookie1024%2FSpin" "/workspace/builds/worker-8/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-8/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/rookie1024/Spin on toolchain beta-2021-10-15
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2021-10-15" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/rookie1024/Spin
[INFO] finished tweaking git repo https://github.com/rookie1024/Spin
[INFO] tweaked toml for git repo https://github.com/rookie1024/Spin written to /workspace/builds/worker-8/source/Cargo.toml
[INFO] crate git repo https://github.com/rookie1024/Spin already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2021-10-15" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded ascii-canvas v1.0.0
[INFO] [stderr]   Downloaded bit-set v0.5.0
[INFO] [stderr]   Downloaded docopt v1.0.2
[INFO] [stderr]   Downloaded lalrpop-util v0.16.1
[INFO] [stderr]   Downloaded string_cache v0.7.3
[INFO] [stderr]   Downloaded ena v0.10.1
[INFO] [stderr]   Downloaded lalrpop v0.16.1
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/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:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2021-10-15" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] cba3a17741af7eb11210c2fd2e4ebf439d3aefc796764b095f4b60f31c2ff670
[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" "cba3a17741af7eb11210c2fd2e4ebf439d3aefc796764b095f4b60f31c2ff670", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "cba3a17741af7eb11210c2fd2e4ebf439d3aefc796764b095f4b60f31c2ff670", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "cba3a17741af7eb11210c2fd2e4ebf439d3aefc796764b095f4b60f31c2ff670", kill_on_drop: false }`
[INFO] [stdout] cba3a17741af7eb11210c2fd2e4ebf439d3aefc796764b095f4b60f31c2ff670
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/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:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2021-10-15" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 5cc0804a8ecc265fdac0175abb6f30807af41fd108de387e2dde6182d3c70e79
[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" "5cc0804a8ecc265fdac0175abb6f30807af41fd108de387e2dde6182d3c70e79", kill_on_drop: false }`
[INFO] [stderr]    Compiling regex v1.0.5
[INFO] [stderr]    Compiling ucd-util v0.1.2
[INFO] [stderr]    Compiling byte-tools v0.3.0
[INFO] [stderr]    Compiling opaque-debug v0.2.1
[INFO] [stderr]    Compiling fixedbitset v0.1.9
[INFO] [stderr]    Compiling lalrpop-util v0.16.1
[INFO] [stderr]    Compiling diff v0.1.11
[INFO] [stderr]    Compiling atty v0.2.11
[INFO] [stderr]    Compiling memchr v2.1.1
[INFO] [stderr]    Compiling phf_shared v0.7.23
[INFO] [stderr]    Compiling log v0.4.6
[INFO] [stderr]    Compiling itertools v0.7.8
[INFO] [stderr]    Compiling rand v0.5.5
[INFO] [stderr]    Compiling new_debug_unreachable v1.0.1
[INFO] [stderr]    Compiling quote v0.6.9
[INFO] [stderr]    Compiling block-padding v0.1.2
[INFO] [stderr]    Compiling petgraph v0.4.13
[INFO] [stderr]    Compiling regex-syntax v0.6.2
[INFO] [stderr]     Checking backtrace v0.3.9
[INFO] [stderr]    Compiling block-buffer v0.7.0
[INFO] [stderr]    Compiling ena v0.10.1
[INFO] [stderr]    Compiling syn v0.15.18
[INFO] [stderr]    Compiling sha2 v0.8.0
[INFO] [stderr]     Checking error-chain v0.12.0
[INFO] [stderr]    Compiling aho-corasick v0.6.9
[INFO] [stderr]    Compiling phf_generator v0.7.23
[INFO] [stderr]    Compiling string_cache_codegen v0.4.2
[INFO] [stderr]    Compiling string_cache v0.7.3
[INFO] [stderr]    Compiling serde_derive v1.0.80
[INFO] [stderr]    Compiling docopt v1.0.2
[INFO] [stderr]    Compiling lalrpop v0.16.1
[INFO] [stderr]    Compiling spin v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stdout]  --> src/main.rs:1:1
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(try_from)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/uwml/element.rs:10:22
[INFO] [stdout]    |
[INFO] [stdout] 10 |   class: ScopeRef<Rc<ElementClass>>,
[INFO] [stdout]    |                      ^^^^^^^^^^^^ help: use `dyn`: `dyn ElementClass`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(bare_trait_objects)]` on by default
[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] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/uwml/element.rs:15:36
[INFO] [stdout]    |
[INFO] [stdout] 15 |   pub fn new<B>(class: ScopeRef<Rc<ElementClass>>, base: B) -> Self
[INFO] [stdout]    |                                    ^^^^^^^^^^^^ help: use `dyn`: `dyn ElementClass`
[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] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/uwml/element.rs:79:22
[INFO] [stdout]    |
[INFO] [stdout] 79 |   class: ScopeRef<Rc<ElementClass>>,
[INFO] [stdout]    |                      ^^^^^^^^^^^^ help: use `dyn`: `dyn ElementClass`
[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] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/uwml/element.rs:84:33
[INFO] [stdout]    |
[INFO] [stdout] 84 |   pub fn new(class: ScopeRef<Rc<ElementClass>>, style: Style) -> Self {
[INFO] [stdout]    |                                 ^^^^^^^^^^^^ help: use `dyn`: `dyn ElementClass`
[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] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/uwml/scope.rs:70:12
[INFO] [stdout]    |
[INFO] [stdout] 70 |   Class(Rc<ElementClass>),
[INFO] [stdout]    |            ^^^^^^^^^^^^ help: use `dyn`: `dyn ElementClass`
[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] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/uwml/scope.rs:89:14
[INFO] [stdout]    |
[INFO] [stdout] 89 | impl From<Rc<ElementClass>> for ScopeItem {
[INFO] [stdout]    |              ^^^^^^^^^^^^ help: use `dyn`: `dyn ElementClass`
[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] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/uwml/scope.rs:90:21
[INFO] [stdout]    |
[INFO] [stdout] 90 |   fn from(class: Rc<ElementClass>) -> Self { ScopeItem::Class(class) }
[INFO] [stdout]    |                     ^^^^^^^^^^^^ help: use `dyn`: `dyn ElementClass`
[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] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/uwml/scope.rs:97:48
[INFO] [stdout]    |
[INFO] [stdout] 97 |   fn from(class: Rc<T>) -> Self { (class as Rc<ElementClass>).into() }
[INFO] [stdout]    |                                                ^^^^^^^^^^^^ help: use `dyn`: `dyn ElementClass`
[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] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/uwml/scope.rs:131:17
[INFO] [stdout]     |
[INFO] [stdout] 131 | impl TryInto<Rc<ElementClass>> for ScopeItem {
[INFO] [stdout]     |                 ^^^^^^^^^^^^ help: use `dyn`: `dyn ElementClass`
[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] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/uwml/scope.rs:135:34
[INFO] [stdout]     |
[INFO] [stdout] 135 |   fn try_into(self) -> Result<Rc<ElementClass>, Self::Error> {
[INFO] [stdout]     |                                  ^^^^^^^^^^^^ help: use `dyn`: `dyn ElementClass`
[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] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around block return value
[INFO] [stdout]     --> /opt/rustwide/target/debug/build/spin-a2aaa4d5956a85d6/out/grammar.rs:2538:5
[INFO] [stdout]      |
[INFO] [stdout] 2538 |     (__0)
[INFO] [stdout]      |     ^^^^^ help: remove these parentheses
[INFO] [stdout]      |
[INFO] [stdout]      = note: `#[warn(unused_parens)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around block return value
[INFO] [stdout]     --> /opt/rustwide/target/debug/build/spin-a2aaa4d5956a85d6/out/grammar.rs:2576:5
[INFO] [stdout]      |
[INFO] [stdout] 2576 |     (__0)
[INFO] [stdout]      |     ^^^^^ help: remove these parentheses
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around block return value
[INFO] [stdout]     --> /opt/rustwide/target/debug/build/spin-a2aaa4d5956a85d6/out/grammar.rs:2727:5
[INFO] [stdout]      |
[INFO] [stdout] 2727 |     (__0)
[INFO] [stdout]      |     ^^^^^ help: remove these parentheses
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around block return value
[INFO] [stdout]     --> /opt/rustwide/target/debug/build/spin-a2aaa4d5956a85d6/out/grammar.rs:2913:5
[INFO] [stdout]      |
[INFO] [stdout] 2913 |     (__0)
[INFO] [stdout]      |     ^^^^^ help: remove these parentheses
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around block return value
[INFO] [stdout]     --> /opt/rustwide/target/debug/build/spin-a2aaa4d5956a85d6/out/grammar.rs:3093:5
[INFO] [stdout]      |
[INFO] [stdout] 3093 |     (__0)
[INFO] [stdout]      |     ^^^^^ help: remove these parentheses
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around block return value
[INFO] [stdout]     --> /opt/rustwide/target/debug/build/spin-a2aaa4d5956a85d6/out/grammar.rs:3227:5
[INFO] [stdout]      |
[INFO] [stdout] 3227 |     (__0)
[INFO] [stdout]      |     ^^^^^ help: remove these parentheses
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stdout]  --> src/main.rs:1:1
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(try_from)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/uwml/element.rs:10:22
[INFO] [stdout]    |
[INFO] [stdout] 10 |   class: ScopeRef<Rc<ElementClass>>,
[INFO] [stdout]    |                      ^^^^^^^^^^^^ help: use `dyn`: `dyn ElementClass`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(bare_trait_objects)]` on by default
[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] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/uwml/element.rs:15:36
[INFO] [stdout]    |
[INFO] [stdout] 15 |   pub fn new<B>(class: ScopeRef<Rc<ElementClass>>, base: B) -> Self
[INFO] [stdout]    |                                    ^^^^^^^^^^^^ help: use `dyn`: `dyn ElementClass`
[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] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/uwml/element.rs:79:22
[INFO] [stdout]    |
[INFO] [stdout] 79 |   class: ScopeRef<Rc<ElementClass>>,
[INFO] [stdout]    |                      ^^^^^^^^^^^^ help: use `dyn`: `dyn ElementClass`
[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] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/uwml/element.rs:84:33
[INFO] [stdout]    |
[INFO] [stdout] 84 |   pub fn new(class: ScopeRef<Rc<ElementClass>>, style: Style) -> Self {
[INFO] [stdout]    |                                 ^^^^^^^^^^^^ help: use `dyn`: `dyn ElementClass`
[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] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/uwml/scope.rs:70:12
[INFO] [stdout]    |
[INFO] [stdout] 70 |   Class(Rc<ElementClass>),
[INFO] [stdout]    |            ^^^^^^^^^^^^ help: use `dyn`: `dyn ElementClass`
[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] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/uwml/scope.rs:89:14
[INFO] [stdout]    |
[INFO] [stdout] 89 | impl From<Rc<ElementClass>> for ScopeItem {
[INFO] [stdout]    |              ^^^^^^^^^^^^ help: use `dyn`: `dyn ElementClass`
[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] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/uwml/scope.rs:90:21
[INFO] [stdout]    |
[INFO] [stdout] 90 |   fn from(class: Rc<ElementClass>) -> Self { ScopeItem::Class(class) }
[INFO] [stdout]    |                     ^^^^^^^^^^^^ help: use `dyn`: `dyn ElementClass`
[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] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/uwml/scope.rs:97:48
[INFO] [stdout]    |
[INFO] [stdout] 97 |   fn from(class: Rc<T>) -> Self { (class as Rc<ElementClass>).into() }
[INFO] [stdout]    |                                                ^^^^^^^^^^^^ help: use `dyn`: `dyn ElementClass`
[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] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/uwml/scope.rs:131:17
[INFO] [stdout]     |
[INFO] [stdout] 131 | impl TryInto<Rc<ElementClass>> for ScopeItem {
[INFO] [stdout]     |                 ^^^^^^^^^^^^ help: use `dyn`: `dyn ElementClass`
[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] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/uwml/scope.rs:135:34
[INFO] [stdout]     |
[INFO] [stdout] 135 |   fn try_into(self) -> Result<Rc<ElementClass>, Self::Error> {
[INFO] [stdout]     |                                  ^^^^^^^^^^^^ help: use `dyn`: `dyn ElementClass`
[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] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around block return value
[INFO] [stdout]     --> /opt/rustwide/target/debug/build/spin-a2aaa4d5956a85d6/out/grammar.rs:2538:5
[INFO] [stdout]      |
[INFO] [stdout] 2538 |     (__0)
[INFO] [stdout]      |     ^^^^^ help: remove these parentheses
[INFO] [stdout]      |
[INFO] [stdout]      = note: `#[warn(unused_parens)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around block return value
[INFO] [stdout]     --> /opt/rustwide/target/debug/build/spin-a2aaa4d5956a85d6/out/grammar.rs:2576:5
[INFO] [stdout]      |
[INFO] [stdout] 2576 |     (__0)
[INFO] [stdout]      |     ^^^^^ help: remove these parentheses
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around block return value
[INFO] [stdout]     --> /opt/rustwide/target/debug/build/spin-a2aaa4d5956a85d6/out/grammar.rs:2727:5
[INFO] [stdout]      |
[INFO] [stdout] 2727 |     (__0)
[INFO] [stdout]      |     ^^^^^ help: remove these parentheses
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around block return value
[INFO] [stdout]     --> /opt/rustwide/target/debug/build/spin-a2aaa4d5956a85d6/out/grammar.rs:2913:5
[INFO] [stdout]      |
[INFO] [stdout] 2913 |     (__0)
[INFO] [stdout]      |     ^^^^^ help: remove these parentheses
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around block return value
[INFO] [stdout]     --> /opt/rustwide/target/debug/build/spin-a2aaa4d5956a85d6/out/grammar.rs:3093:5
[INFO] [stdout]      |
[INFO] [stdout] 3093 |     (__0)
[INFO] [stdout]      |     ^^^^^ help: remove these parentheses
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around block return value
[INFO] [stdout]     --> /opt/rustwide/target/debug/build/spin-a2aaa4d5956a85d6/out/grammar.rs:3227:5
[INFO] [stdout]      |
[INFO] [stdout] 3227 |     (__0)
[INFO] [stdout]      |     ^^^^^ help: remove these parentheses
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated associated function `core::str::<impl str>::trim_left`: superseded by `trim_start`
[INFO] [stdout]     --> /opt/rustwide/target/debug/build/spin-a2aaa4d5956a85d6/out/grammar.rs:2491:36
[INFO] [stdout]      |
[INFO] [stdout] 2491 |             let __text = self.text.trim_left();
[INFO] [stdout]      |                                    ^^^^^^^^^ help: replace the use of the deprecated associated function: `trim_start`
[INFO] [stdout]      |
[INFO] [stdout]      = note: `#[warn(deprecated)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to previous error; 17 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0554`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `spin` due to 2 previous errors; 17 warnings emitted
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stdout] warning: use of deprecated associated function `core::str::<impl str>::trim_left`: superseded by `trim_start`
[INFO] [stdout]     --> /opt/rustwide/target/debug/build/spin-a2aaa4d5956a85d6/out/grammar.rs:2491:36
[INFO] [stdout]      |
[INFO] [stdout] 2491 |             let __text = self.text.trim_left();
[INFO] [stdout]      |                                    ^^^^^^^^^ help: replace the use of the deprecated associated function: `trim_start`
[INFO] [stdout]      |
[INFO] [stdout]      = note: `#[warn(deprecated)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to previous error; 17 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0554`.
[INFO] [stdout] 
[INFO] [stderr] error: build failed
[INFO] running `Command { std: "docker" "inspect" "5cc0804a8ecc265fdac0175abb6f30807af41fd108de387e2dde6182d3c70e79", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "5cc0804a8ecc265fdac0175abb6f30807af41fd108de387e2dde6182d3c70e79", kill_on_drop: false }`
[INFO] [stdout] 5cc0804a8ecc265fdac0175abb6f30807af41fd108de387e2dde6182d3c70e79
