[INFO] fetching crate supercow 0.1.0...
[INFO] building supercow-0.1.0 against try#d79d87d4c0f7f0d0785ad6e493cf8cf718ed89a6 for pr-146237-1
[INFO] extracting crate supercow 0.1.0 into /workspace/builds/worker-0-tc2/source
[INFO] started tweaking crates.io crate supercow 0.1.0
[INFO] finished tweaking crates.io crate supercow 0.1.0
[INFO] tweaked toml for crates.io crate supercow 0.1.0 written to /workspace/builds/worker-0-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate supercow 0.1.0 on toolchain d79d87d4c0f7f0d0785ad6e493cf8cf718ed89a6
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+d79d87d4c0f7f0d0785ad6e493cf8cf718ed89a6" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+d79d87d4c0f7f0d0785ad6e493cf8cf718ed89a6" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+d79d87d4c0f7f0d0785ad6e493cf8cf718ed89a6" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr] warning: no edition set: defaulting to the 2015 edition while the latest is 2024
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+d79d87d4c0f7f0d0785ad6e493cf8cf718ed89a6" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 853414b20380e7a7161e279f55a5f1a60592210be4bbd17688370853bb071c1d
[INFO] running `Command { std: "docker" "start" "-a" "853414b20380e7a7161e279f55a5f1a60592210be4bbd17688370853bb071c1d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "853414b20380e7a7161e279f55a5f1a60592210be4bbd17688370853bb071c1d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "853414b20380e7a7161e279f55a5f1a60592210be4bbd17688370853bb071c1d", kill_on_drop: false }`
[INFO] [stdout] 853414b20380e7a7161e279f55a5f1a60592210be4bbd17688370853bb071c1d
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+d79d87d4c0f7f0d0785ad6e493cf8cf718ed89a6" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] d38036bc64a5c5c26a20e4993747e92e25d4e674d03acc93e45ec620ceab95ae
[INFO] running `Command { std: "docker" "start" "-a" "d38036bc64a5c5c26a20e4993747e92e25d4e674d03acc93e45ec620ceab95ae", kill_on_drop: false }`
[INFO] [stderr] warning: no edition set: defaulting to the 2015 edition while the latest is 2024
[INFO] [stderr]    Compiling supercow v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: use of deprecated function `std::mem::uninitialized`: use `mem::MaybeUninit` instead
[INFO] [stdout]    --> src/ext.rs:515:23
[INFO] [stdout]     |
[INFO] [stdout] 515 |         unsafe { mem::uninitialized() }
[INFO] [stdout]     |                       ^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(deprecated)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/lib.rs:898:43
[INFO] [stdout]     |
[INFO] [stdout] 898 |               fn $clone_boxed(&self) -> Box<$feature_name<'a> + 'a> {
[INFO] [stdout]     |                                             ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 949 | / supercow_features!(
[INFO] [stdout] 950 | |     /// The default shared reference type for `Supercow`.
[INFO] [stdout] 951 | |     ///
[INFO] [stdout] 952 | |     /// This requires the shared reference type to be `Clone`, `Send`, and
[INFO] [stdout] ...   |
[INFO] [stdout] 957 | |     /// See also `NonSyncFeatures`.
[INFO] [stdout] 958 | |     pub trait DefaultFeatures: Clone, TwoStepShared(TwoStepArc), Send, Sync);
[INFO] [stdout]     | |____________________________________________________________________________- in this macro invocation
[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/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout]     = note: `#[warn(bare_trait_objects)]` (part of `#[warn(rust_2021_compatibility)]`) on by default
[INFO] [stdout]     = note: this warning originates in the macro `supercow_features` (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/lib.rs:886:43
[INFO] [stdout]     |
[INFO] [stdout] 886 |               fn $clone_boxed(&self) -> Box<$feature_name<'a> + 'a>;
[INFO] [stdout]     |                                             ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 949 | / supercow_features!(
[INFO] [stdout] 950 | |     /// The default shared reference type for `Supercow`.
[INFO] [stdout] 951 | |     ///
[INFO] [stdout] 952 | |     /// This requires the shared reference type to be `Clone`, `Send`, and
[INFO] [stdout] ...   |
[INFO] [stdout] 957 | |     /// See also `NonSyncFeatures`.
[INFO] [stdout] 958 | |     pub trait DefaultFeatures: Clone, TwoStepShared(TwoStepArc), Send, Sync);
[INFO] [stdout]     | |____________________________________________________________________________- in this macro invocation
[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/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout]     = note: this warning originates in the macro `supercow_features` (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/lib.rs:917:33
[INFO] [stdout]     |
[INFO] [stdout] 917 |           impl<'a> $clone for Box<$feature_name<'a> + 'a> {
[INFO] [stdout]     |                                   ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 949 | / supercow_features!(
[INFO] [stdout] 950 | |     /// The default shared reference type for `Supercow`.
[INFO] [stdout] 951 | |     ///
[INFO] [stdout] 952 | |     /// This requires the shared reference type to be `Clone`, `Send`, and
[INFO] [stdout] ...   |
[INFO] [stdout] 957 | |     /// See also `NonSyncFeatures`.
[INFO] [stdout] 958 | |     pub trait DefaultFeatures: Clone, TwoStepShared(TwoStepArc), Send, Sync);
[INFO] [stdout]     | |____________________________________________________________________________- in this macro invocation
[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/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout]     = note: this warning originates in the macro `supercow_features` (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/lib.rs:917:33
[INFO] [stdout]     |
[INFO] [stdout] 917 |           impl<'a> $clone for Box<$feature_name<'a> + 'a> {
[INFO] [stdout]     |                                   ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 959 | / supercow_features!(
[INFO] [stdout] 960 | |     /// The shared reference type for `NonSyncSupercow`.
[INFO] [stdout] 961 | |     ///
[INFO] [stdout] 962 | |     /// Unlike `DefaultFeatures`, this only requires the shared reference type
[INFO] [stdout] 963 | |     /// to be `Clone`, thus permitting `Rc`.
[INFO] [stdout] 964 | |     pub trait NonSyncFeatures: Clone, TwoStepShared(TwoStepRc));
[INFO] [stdout]     | |_______________________________________________________________- in this macro invocation
[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/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout]     = note: this warning originates in the macro `supercow_features` (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/lib.rs:911:17
[INFO] [stdout]     |
[INFO] [stdout] 911 |           for Box<$feature_name<'a> + 'a> {
[INFO] [stdout]     |                   ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 949 | / supercow_features!(
[INFO] [stdout] 950 | |     /// The default shared reference type for `Supercow`.
[INFO] [stdout] 951 | |     ///
[INFO] [stdout] 952 | |     /// This requires the shared reference type to be `Clone`, `Send`, and
[INFO] [stdout] ...   |
[INFO] [stdout] 957 | |     /// See also `NonSyncFeatures`.
[INFO] [stdout] 958 | |     pub trait DefaultFeatures: Clone, TwoStepShared(TwoStepArc), Send, Sync);
[INFO] [stdout]     | |____________________________________________________________________________- in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]     = note: for more information, see <https://doc.rust-lang.org/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout]     = note: this warning originates in the macro `supercow_features` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/lib.rs:911:17
[INFO] [stdout]     |
[INFO] [stdout] 911 |           for Box<$feature_name<'a> + 'a> {
[INFO] [stdout]     |                   ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 959 | / supercow_features!(
[INFO] [stdout] 960 | |     /// The shared reference type for `NonSyncSupercow`.
[INFO] [stdout] 961 | |     ///
[INFO] [stdout] 962 | |     /// Unlike `DefaultFeatures`, this only requires the shared reference type
[INFO] [stdout] 963 | |     /// to be `Clone`, thus permitting `Rc`.
[INFO] [stdout] 964 | |     pub trait NonSyncFeatures: Clone, TwoStepShared(TwoStepRc));
[INFO] [stdout]     | |_______________________________________________________________- in this macro invocation
[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/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout]     = note: this warning originates in the macro `supercow_features` (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/lib.rs:925:17
[INFO] [stdout]     |
[INFO] [stdout] 925 |           for Box<$feature_name<'a> + 'a>
[INFO] [stdout]     |                   ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 949 | / supercow_features!(
[INFO] [stdout] 950 | |     /// The default shared reference type for `Supercow`.
[INFO] [stdout] 951 | |     ///
[INFO] [stdout] 952 | |     /// This requires the shared reference type to be `Clone`, `Send`, and
[INFO] [stdout] ...   |
[INFO] [stdout] 957 | |     /// See also `NonSyncFeatures`.
[INFO] [stdout] 958 | |     pub trait DefaultFeatures: Clone, TwoStepShared(TwoStepArc), Send, Sync);
[INFO] [stdout]     | |____________________________________________________________________________- in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]     = note: for more information, see <https://doc.rust-lang.org/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout]     = note: this warning originates in the macro `supercow_features` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/lib.rs:925:17
[INFO] [stdout]     |
[INFO] [stdout] 925 |           for Box<$feature_name<'a> + 'a>
[INFO] [stdout]     |                   ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 959 | / supercow_features!(
[INFO] [stdout] 960 | |     /// The shared reference type for `NonSyncSupercow`.
[INFO] [stdout] 961 | |     ///
[INFO] [stdout] 962 | |     /// Unlike `DefaultFeatures`, this only requires the shared reference type
[INFO] [stdout] 963 | |     /// to be `Clone`, thus permitting `Rc`.
[INFO] [stdout] 964 | |     pub trait NonSyncFeatures: Clone, TwoStepShared(TwoStepRc));
[INFO] [stdout]     | |_______________________________________________________________- in this macro invocation
[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/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout]     = note: this warning originates in the macro `supercow_features` (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/lib.rs:886:43
[INFO] [stdout]     |
[INFO] [stdout] 886 |               fn $clone_boxed(&self) -> Box<$feature_name<'a> + 'a>;
[INFO] [stdout]     |                                             ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 959 | / supercow_features!(
[INFO] [stdout] 960 | |     /// The shared reference type for `NonSyncSupercow`.
[INFO] [stdout] 961 | |     ///
[INFO] [stdout] 962 | |     /// Unlike `DefaultFeatures`, this only requires the shared reference type
[INFO] [stdout] 963 | |     /// to be `Clone`, thus permitting `Rc`.
[INFO] [stdout] 964 | |     pub trait NonSyncFeatures: Clone, TwoStepShared(TwoStepRc));
[INFO] [stdout]     | |_______________________________________________________________- in this macro invocation
[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/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout]     = note: this warning originates in the macro `supercow_features` (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/lib.rs:898:43
[INFO] [stdout]     |
[INFO] [stdout] 898 |               fn $clone_boxed(&self) -> Box<$feature_name<'a> + 'a> {
[INFO] [stdout]     |                                             ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 959 | / supercow_features!(
[INFO] [stdout] 960 | |     /// The shared reference type for `NonSyncSupercow`.
[INFO] [stdout] 961 | |     ///
[INFO] [stdout] 962 | |     /// Unlike `DefaultFeatures`, this only requires the shared reference type
[INFO] [stdout] 963 | |     /// to be `Clone`, thus permitting `Rc`.
[INFO] [stdout] 964 | |     pub trait NonSyncFeatures: Clone, TwoStepShared(TwoStepRc));
[INFO] [stdout]     | |_______________________________________________________________- in this macro invocation
[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/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout]     = note: this warning originates in the macro `supercow_features` (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/lib.rs:985:18
[INFO] [stdout]     |
[INFO] [stdout] 985 |              Box<NonSyncFeatures<'static> + 'static>,
[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/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] 985 |              Box<dyn NonSyncFeatures<'static> + 'static>,
[INFO] [stdout]     |                  +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/lib.rs:995:37
[INFO] [stdout]     |
[INFO] [stdout] 995 |                        SHARED = Box<DefaultFeatures<'static> + 'static>> =
[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/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] 995 |                        SHARED = Box<dyn DefaultFeatures<'static> + 'static>> =
[INFO] [stdout]     |                                     +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]     --> src/lib.rs:1003:18
[INFO] [stdout]      |
[INFO] [stdout] 1003 |              Box<NonSyncFeatures<'static> + 'static>,
[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/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] 1003 |              Box<dyn NonSyncFeatures<'static> + 'static>,
[INFO] [stdout]      |                  +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]     --> src/lib.rs:1004:39
[INFO] [stdout]      |
[INFO] [stdout] 1004 |              InlineStorage<OWNED, Box<NonSyncFeatures<'static> + 'static>>>;
[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/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] 1004 |              InlineStorage<OWNED, Box<dyn NonSyncFeatures<'static> + 'static>>>;
[INFO] [stdout]      |                                       +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]     --> src/lib.rs:1022:34
[INFO] [stdout]      |
[INFO] [stdout] 1022 |                     SHARED = Box<DefaultFeatures<'static> + 'static>,
[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/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] 1022 |                     SHARED = Box<dyn DefaultFeatures<'static> + 'static>,
[INFO] [stdout]      |                                  +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]     --> src/lib.rs:1102:34
[INFO] [stdout]      |
[INFO] [stdout] 1102 |                     SHARED = Box<DefaultFeatures<'static> + 'static>,
[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/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] 1102 |                     SHARED = Box<dyn DefaultFeatures<'static> + 'static>,
[INFO] [stdout]      |                                  +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]     --> src/lib.rs:1108:41
[INFO] [stdout]      |
[INFO] [stdout] 1108 |     Phantomcow<'a, OWNED, BORROWED, Box<NonSyncFeatures<'static> + 'static>,
[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/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] 1108 |     Phantomcow<'a, OWNED, BORROWED, Box<dyn NonSyncFeatures<'static> + 'static>,
[INFO] [stdout]      |                                         +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]     --> src/lib.rs:1113:40
[INFO] [stdout]      |
[INFO] [stdout] 1113 |                           SHARED = Box<DefaultFeatures<'static> + 'static>> =
[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/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] 1113 |                           SHARED = Box<dyn DefaultFeatures<'static> + 'static>> =
[INFO] [stdout]      |                                        +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]     --> src/lib.rs:1118:41
[INFO] [stdout]      |
[INFO] [stdout] 1118 |     Phantomcow<'a, OWNED, BORROWED, Box<NonSyncFeatures<'static> + 'static>,
[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/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] 1118 |     Phantomcow<'a, OWNED, BORROWED, Box<dyn NonSyncFeatures<'static> + 'static>,
[INFO] [stdout]      |                                         +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]     --> src/lib.rs:1119:39
[INFO] [stdout]      |
[INFO] [stdout] 1119 |              InlineStorage<OWNED, Box<NonSyncFeatures<'static> + 'static>>>;
[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/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] 1119 |              InlineStorage<OWNED, Box<dyn NonSyncFeatures<'static> + 'static>>>;
[INFO] [stdout]      |                                       +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the type `*const T` does not permit being left uninitialized
[INFO] [stdout]    --> src/ext.rs:515:18
[INFO] [stdout]     |
[INFO] [stdout] 515 |         unsafe { mem::uninitialized() }
[INFO] [stdout]     |                  ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |                  |
[INFO] [stdout]     |                  this code causes undefined behavior when executed
[INFO] [stdout]     |                  help: use `MaybeUninit<T>` instead, and only call `assume_init` after initialization is done
[INFO] [stdout]     |
[INFO] [stdout]     = note: raw pointers must be initialized
[INFO] [stdout]     = note: `#[warn(invalid_value)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.40s
[INFO] running `Command { std: "docker" "inspect" "d38036bc64a5c5c26a20e4993747e92e25d4e674d03acc93e45ec620ceab95ae", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d38036bc64a5c5c26a20e4993747e92e25d4e674d03acc93e45ec620ceab95ae", kill_on_drop: false }`
[INFO] [stdout] d38036bc64a5c5c26a20e4993747e92e25d4e674d03acc93e45ec620ceab95ae
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+d79d87d4c0f7f0d0785ad6e493cf8cf718ed89a6" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 63fe895d1412c4004b6fd3e8f356679d20f08445492dd1d3d5c77bd1e36d4989
[INFO] running `Command { std: "docker" "start" "-a" "63fe895d1412c4004b6fd3e8f356679d20f08445492dd1d3d5c77bd1e36d4989", kill_on_drop: false }`
[INFO] [stderr] warning: no edition set: defaulting to the 2015 edition while the latest is 2024
[INFO] [stdout] warning: use of deprecated function `std::mem::uninitialized`: use `mem::MaybeUninit` instead
[INFO] [stdout]    --> src/ext.rs:515:23
[INFO] [stdout]     |
[INFO] [stdout] 515 |         unsafe { mem::uninitialized() }
[INFO] [stdout]     |                       ^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(deprecated)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/lib.rs:898:43
[INFO] [stdout]     |
[INFO] [stdout] 898 |               fn $clone_boxed(&self) -> Box<$feature_name<'a> + 'a> {
[INFO] [stdout]     |                                             ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 949 | / supercow_features!(
[INFO] [stdout] 950 | |     /// The default shared reference type for `Supercow`.
[INFO] [stdout] 951 | |     ///
[INFO] [stdout] 952 | |     /// This requires the shared reference type to be `Clone`, `Send`, and
[INFO] [stdout] ...   |
[INFO] [stdout] 957 | |     /// See also `NonSyncFeatures`.
[INFO] [stdout] 958 | |     pub trait DefaultFeatures: Clone, TwoStepShared(TwoStepArc), Send, Sync);
[INFO] [stdout]     | |____________________________________________________________________________- in this macro invocation
[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/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout]     = note: `#[warn(bare_trait_objects)]` (part of `#[warn(rust_2021_compatibility)]`) on by default
[INFO] [stdout]     = note: this warning originates in the macro `supercow_features` (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/lib.rs:886:43
[INFO] [stdout]     |
[INFO] [stdout] 886 |               fn $clone_boxed(&self) -> Box<$feature_name<'a> + 'a>;
[INFO] [stdout]     |                                             ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 949 | / supercow_features!(
[INFO] [stdout] 950 | |     /// The default shared reference type for `Supercow`.
[INFO] [stdout] 951 | |     ///
[INFO] [stdout] 952 | |     /// This requires the shared reference type to be `Clone`, `Send`, and
[INFO] [stdout] ...   |
[INFO] [stdout] 957 | |     /// See also `NonSyncFeatures`.
[INFO] [stdout] 958 | |     pub trait DefaultFeatures: Clone, TwoStepShared(TwoStepArc), Send, Sync);
[INFO] [stdout]     | |____________________________________________________________________________- in this macro invocation
[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/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout]     = note: this warning originates in the macro `supercow_features` (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/lib.rs:917:33
[INFO] [stdout]     |
[INFO] [stdout] 917 |           impl<'a> $clone for Box<$feature_name<'a> + 'a> {
[INFO] [stdout]     |                                   ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 949 | / supercow_features!(
[INFO] [stdout] 950 | |     /// The default shared reference type for `Supercow`.
[INFO] [stdout] 951 | |     ///
[INFO] [stdout] 952 | |     /// This requires the shared reference type to be `Clone`, `Send`, and
[INFO] [stdout] ...   |
[INFO] [stdout] 957 | |     /// See also `NonSyncFeatures`.
[INFO] [stdout] 958 | |     pub trait DefaultFeatures: Clone, TwoStepShared(TwoStepArc), Send, Sync);
[INFO] [stdout]     | |____________________________________________________________________________- in this macro invocation
[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/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout]     = note: this warning originates in the macro `supercow_features` (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/lib.rs:917:33
[INFO] [stdout]     |
[INFO] [stdout] 917 |           impl<'a> $clone for Box<$feature_name<'a> + 'a> {
[INFO] [stdout]     |                                   ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 959 | / supercow_features!(
[INFO] [stdout] 960 | |     /// The shared reference type for `NonSyncSupercow`.
[INFO] [stdout] 961 | |     ///
[INFO] [stdout] 962 | |     /// Unlike `DefaultFeatures`, this only requires the shared reference type
[INFO] [stdout] 963 | |     /// to be `Clone`, thus permitting `Rc`.
[INFO] [stdout] 964 | |     pub trait NonSyncFeatures: Clone, TwoStepShared(TwoStepRc));
[INFO] [stdout]     | |_______________________________________________________________- in this macro invocation
[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/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout]     = note: this warning originates in the macro `supercow_features` (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/lib.rs:911:17
[INFO] [stdout]     |
[INFO] [stdout] 911 |           for Box<$feature_name<'a> + 'a> {
[INFO] [stdout]     |                   ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 949 | / supercow_features!(
[INFO] [stdout] 950 | |     /// The default shared reference type for `Supercow`.
[INFO] [stdout] 951 | |     ///
[INFO] [stdout] 952 | |     /// This requires the shared reference type to be `Clone`, `Send`, and
[INFO] [stdout] ...   |
[INFO] [stdout] 957 | |     /// See also `NonSyncFeatures`.
[INFO] [stdout] 958 | |     pub trait DefaultFeatures: Clone, TwoStepShared(TwoStepArc), Send, Sync);
[INFO] [stdout]     | |____________________________________________________________________________- in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]     = note: for more information, see <https://doc.rust-lang.org/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout]     = note: this warning originates in the macro `supercow_features` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/lib.rs:911:17
[INFO] [stdout]     |
[INFO] [stdout] 911 |           for Box<$feature_name<'a> + 'a> {
[INFO] [stdout]     |                   ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 959 | / supercow_features!(
[INFO] [stdout] 960 | |     /// The shared reference type for `NonSyncSupercow`.
[INFO] [stdout] 961 | |     ///
[INFO] [stdout] 962 | |     /// Unlike `DefaultFeatures`, this only requires the shared reference type
[INFO] [stdout] 963 | |     /// to be `Clone`, thus permitting `Rc`.
[INFO] [stdout] 964 | |     pub trait NonSyncFeatures: Clone, TwoStepShared(TwoStepRc));
[INFO] [stdout]     | |_______________________________________________________________- in this macro invocation
[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/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout]     = note: this warning originates in the macro `supercow_features` (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/lib.rs:925:17
[INFO] [stdout]     |
[INFO] [stdout] 925 |           for Box<$feature_name<'a> + 'a>
[INFO] [stdout]     |                   ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 949 | / supercow_features!(
[INFO] [stdout] 950 | |     /// The default shared reference type for `Supercow`.
[INFO] [stdout] 951 | |     ///
[INFO] [stdout] 952 | |     /// This requires the shared reference type to be `Clone`, `Send`, and
[INFO] [stdout] ...   |
[INFO] [stdout] 957 | |     /// See also `NonSyncFeatures`.
[INFO] [stdout] 958 | |     pub trait DefaultFeatures: Clone, TwoStepShared(TwoStepArc), Send, Sync);
[INFO] [stdout]     | |____________________________________________________________________________- in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]     = note: for more information, see <https://doc.rust-lang.org/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout]     = note: this warning originates in the macro `supercow_features` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/lib.rs:925:17
[INFO] [stdout]     |
[INFO] [stdout] 925 |           for Box<$feature_name<'a> + 'a>
[INFO] [stdout]     |                   ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 959 | / supercow_features!(
[INFO] [stdout] 960 | |     /// The shared reference type for `NonSyncSupercow`.
[INFO] [stdout] 961 | |     ///
[INFO] [stdout] 962 | |     /// Unlike `DefaultFeatures`, this only requires the shared reference type
[INFO] [stdout] 963 | |     /// to be `Clone`, thus permitting `Rc`.
[INFO] [stdout] 964 | |     pub trait NonSyncFeatures: Clone, TwoStepShared(TwoStepRc));
[INFO] [stdout]     | |_______________________________________________________________- in this macro invocation
[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/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout]     = note: this warning originates in the macro `supercow_features` (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/lib.rs:886:43
[INFO] [stdout]     |
[INFO] [stdout] 886 |               fn $clone_boxed(&self) -> Box<$feature_name<'a> + 'a>;
[INFO] [stdout]     |                                             ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 959 | / supercow_features!(
[INFO] [stdout] 960 | |     /// The shared reference type for `NonSyncSupercow`.
[INFO] [stdout] 961 | |     ///
[INFO] [stdout] 962 | |     /// Unlike `DefaultFeatures`, this only requires the shared reference type
[INFO] [stdout] 963 | |     /// to be `Clone`, thus permitting `Rc`.
[INFO] [stdout] 964 | |     pub trait NonSyncFeatures: Clone, TwoStepShared(TwoStepRc));
[INFO] [stdout]     | |_______________________________________________________________- in this macro invocation
[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/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout]     = note: this warning originates in the macro `supercow_features` (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/lib.rs:898:43
[INFO] [stdout]     |
[INFO] [stdout] 898 |               fn $clone_boxed(&self) -> Box<$feature_name<'a> + 'a> {
[INFO] [stdout]     |                                             ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 959 | / supercow_features!(
[INFO] [stdout] 960 | |     /// The shared reference type for `NonSyncSupercow`.
[INFO] [stdout] 961 | |     ///
[INFO] [stdout] 962 | |     /// Unlike `DefaultFeatures`, this only requires the shared reference type
[INFO] [stdout] 963 | |     /// to be `Clone`, thus permitting `Rc`.
[INFO] [stdout] 964 | |     pub trait NonSyncFeatures: Clone, TwoStepShared(TwoStepRc));
[INFO] [stdout]     | |_______________________________________________________________- in this macro invocation
[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/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout]     = note: this warning originates in the macro `supercow_features` (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/lib.rs:985:18
[INFO] [stdout]     |
[INFO] [stdout] 985 |              Box<NonSyncFeatures<'static> + 'static>,
[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/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] 985 |              Box<dyn NonSyncFeatures<'static> + 'static>,
[INFO] [stdout]     |                  +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/lib.rs:995:37
[INFO] [stdout]     |
[INFO] [stdout] 995 |                        SHARED = Box<DefaultFeatures<'static> + 'static>> =
[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/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] 995 |                        SHARED = Box<dyn DefaultFeatures<'static> + 'static>> =
[INFO] [stdout]     |                                     +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]    Compiling supercow v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]     --> src/lib.rs:1003:18
[INFO] [stdout]      |
[INFO] [stdout] 1003 |              Box<NonSyncFeatures<'static> + 'static>,
[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/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] 1003 |              Box<dyn NonSyncFeatures<'static> + 'static>,
[INFO] [stdout]      |                  +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]     --> src/lib.rs:1004:39
[INFO] [stdout]      |
[INFO] [stdout] 1004 |              InlineStorage<OWNED, Box<NonSyncFeatures<'static> + 'static>>>;
[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/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] 1004 |              InlineStorage<OWNED, Box<dyn NonSyncFeatures<'static> + 'static>>>;
[INFO] [stdout]      |                                       +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]     --> src/lib.rs:1022:34
[INFO] [stdout]      |
[INFO] [stdout] 1022 |                     SHARED = Box<DefaultFeatures<'static> + 'static>,
[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/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] 1022 |                     SHARED = Box<dyn DefaultFeatures<'static> + 'static>,
[INFO] [stdout]      |                                  +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]     --> src/lib.rs:1102:34
[INFO] [stdout]      |
[INFO] [stdout] 1102 |                     SHARED = Box<DefaultFeatures<'static> + 'static>,
[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/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] 1102 |                     SHARED = Box<dyn DefaultFeatures<'static> + 'static>,
[INFO] [stdout]      |                                  +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]     --> src/lib.rs:1108:41
[INFO] [stdout]      |
[INFO] [stdout] 1108 |     Phantomcow<'a, OWNED, BORROWED, Box<NonSyncFeatures<'static> + 'static>,
[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/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] 1108 |     Phantomcow<'a, OWNED, BORROWED, Box<dyn NonSyncFeatures<'static> + 'static>,
[INFO] [stdout]      |                                         +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]     --> src/lib.rs:1113:40
[INFO] [stdout]      |
[INFO] [stdout] 1113 |                           SHARED = Box<DefaultFeatures<'static> + 'static>> =
[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/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] 1113 |                           SHARED = Box<dyn DefaultFeatures<'static> + 'static>> =
[INFO] [stdout]      |                                        +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]     --> src/lib.rs:1118:41
[INFO] [stdout]      |
[INFO] [stdout] 1118 |     Phantomcow<'a, OWNED, BORROWED, Box<NonSyncFeatures<'static> + 'static>,
[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/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] 1118 |     Phantomcow<'a, OWNED, BORROWED, Box<dyn NonSyncFeatures<'static> + 'static>,
[INFO] [stdout]      |                                         +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]     --> src/lib.rs:1119:39
[INFO] [stdout]      |
[INFO] [stdout] 1119 |              InlineStorage<OWNED, Box<NonSyncFeatures<'static> + 'static>>>;
[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/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] 1119 |              InlineStorage<OWNED, Box<dyn NonSyncFeatures<'static> + 'static>>>;
[INFO] [stdout]      |                                       +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the type `*const T` does not permit being left uninitialized
[INFO] [stdout]    --> src/ext.rs:515:18
[INFO] [stdout]     |
[INFO] [stdout] 515 |         unsafe { mem::uninitialized() }
[INFO] [stdout]     |                  ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |                  |
[INFO] [stdout]     |                  this code causes undefined behavior when executed
[INFO] [stdout]     |                  help: use `MaybeUninit<T>` instead, and only call `assume_init` after initialization is done
[INFO] [stdout]     |
[INFO] [stdout]     = note: raw pointers must be initialized
[INFO] [stdout]     = note: `#[warn(invalid_value)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated function `std::mem::uninitialized`: use `mem::MaybeUninit` instead
[INFO] [stdout]    --> src/ext.rs:515:23
[INFO] [stdout]     |
[INFO] [stdout] 515 |         unsafe { mem::uninitialized() }
[INFO] [stdout]     |                       ^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(deprecated)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/lib.rs:911:17
[INFO] [stdout]     |
[INFO] [stdout] 911 |           for Box<$feature_name<'a> + 'a> {
[INFO] [stdout]     |                   ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 949 | / supercow_features!(
[INFO] [stdout] 950 | |     /// The default shared reference type for `Supercow`.
[INFO] [stdout] 951 | |     ///
[INFO] [stdout] 952 | |     /// This requires the shared reference type to be `Clone`, `Send`, and
[INFO] [stdout] ...   |
[INFO] [stdout] 957 | |     /// See also `NonSyncFeatures`.
[INFO] [stdout] 958 | |     pub trait DefaultFeatures: Clone, TwoStepShared(TwoStepArc), Send, Sync);
[INFO] [stdout]     | |____________________________________________________________________________- in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]     = note: for more information, see <https://doc.rust-lang.org/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout]     = note: `#[warn(bare_trait_objects)]` (part of `#[warn(rust_2021_compatibility)]`) on by default
[INFO] [stdout]     = note: this warning originates in the macro `supercow_features` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/lib.rs:911:17
[INFO] [stdout]     |
[INFO] [stdout] 911 |           for Box<$feature_name<'a> + 'a> {
[INFO] [stdout]     |                   ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 959 | / supercow_features!(
[INFO] [stdout] 960 | |     /// The shared reference type for `NonSyncSupercow`.
[INFO] [stdout] 961 | |     ///
[INFO] [stdout] 962 | |     /// Unlike `DefaultFeatures`, this only requires the shared reference type
[INFO] [stdout] 963 | |     /// to be `Clone`, thus permitting `Rc`.
[INFO] [stdout] 964 | |     pub trait NonSyncFeatures: Clone, TwoStepShared(TwoStepRc));
[INFO] [stdout]     | |_______________________________________________________________- in this macro invocation
[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/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout]     = note: this warning originates in the macro `supercow_features` (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/lib.rs:917:33
[INFO] [stdout]     |
[INFO] [stdout] 917 |           impl<'a> $clone for Box<$feature_name<'a> + 'a> {
[INFO] [stdout]     |                                   ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 949 | / supercow_features!(
[INFO] [stdout] 950 | |     /// The default shared reference type for `Supercow`.
[INFO] [stdout] 951 | |     ///
[INFO] [stdout] 952 | |     /// This requires the shared reference type to be `Clone`, `Send`, and
[INFO] [stdout] ...   |
[INFO] [stdout] 957 | |     /// See also `NonSyncFeatures`.
[INFO] [stdout] 958 | |     pub trait DefaultFeatures: Clone, TwoStepShared(TwoStepArc), Send, Sync);
[INFO] [stdout]     | |____________________________________________________________________________- in this macro invocation
[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/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout]     = note: this warning originates in the macro `supercow_features` (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/lib.rs:917:33
[INFO] [stdout]     |
[INFO] [stdout] 917 |           impl<'a> $clone for Box<$feature_name<'a> + 'a> {
[INFO] [stdout]     |                                   ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 959 | / supercow_features!(
[INFO] [stdout] 960 | |     /// The shared reference type for `NonSyncSupercow`.
[INFO] [stdout] 961 | |     ///
[INFO] [stdout] 962 | |     /// Unlike `DefaultFeatures`, this only requires the shared reference type
[INFO] [stdout] 963 | |     /// to be `Clone`, thus permitting `Rc`.
[INFO] [stdout] 964 | |     pub trait NonSyncFeatures: Clone, TwoStepShared(TwoStepRc));
[INFO] [stdout]     | |_______________________________________________________________- in this macro invocation
[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/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout]     = note: this warning originates in the macro `supercow_features` (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/lib.rs:995:37
[INFO] [stdout]     |
[INFO] [stdout] 995 |                        SHARED = Box<DefaultFeatures<'static> + 'static>> =
[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/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] 995 |                        SHARED = Box<dyn DefaultFeatures<'static> + 'static>> =
[INFO] [stdout]     |                                     +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/lib.rs:898:43
[INFO] [stdout]     |
[INFO] [stdout] 898 |               fn $clone_boxed(&self) -> Box<$feature_name<'a> + 'a> {
[INFO] [stdout]     |                                             ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 949 | / supercow_features!(
[INFO] [stdout] 950 | |     /// The default shared reference type for `Supercow`.
[INFO] [stdout] 951 | |     ///
[INFO] [stdout] 952 | |     /// This requires the shared reference type to be `Clone`, `Send`, and
[INFO] [stdout] ...   |
[INFO] [stdout] 957 | |     /// See also `NonSyncFeatures`.
[INFO] [stdout] 958 | |     pub trait DefaultFeatures: Clone, TwoStepShared(TwoStepArc), Send, Sync);
[INFO] [stdout]     | |____________________________________________________________________________- in this macro invocation
[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/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout]     = note: this warning originates in the macro `supercow_features` (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/lib.rs:886:43
[INFO] [stdout]     |
[INFO] [stdout] 886 |               fn $clone_boxed(&self) -> Box<$feature_name<'a> + 'a>;
[INFO] [stdout]     |                                             ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 949 | / supercow_features!(
[INFO] [stdout] 950 | |     /// The default shared reference type for `Supercow`.
[INFO] [stdout] 951 | |     ///
[INFO] [stdout] 952 | |     /// This requires the shared reference type to be `Clone`, `Send`, and
[INFO] [stdout] ...   |
[INFO] [stdout] 957 | |     /// See also `NonSyncFeatures`.
[INFO] [stdout] 958 | |     pub trait DefaultFeatures: Clone, TwoStepShared(TwoStepArc), Send, Sync);
[INFO] [stdout]     | |____________________________________________________________________________- in this macro invocation
[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/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout]     = note: this warning originates in the macro `supercow_features` (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/lib.rs:925:17
[INFO] [stdout]     |
[INFO] [stdout] 925 |           for Box<$feature_name<'a> + 'a>
[INFO] [stdout]     |                   ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 949 | / supercow_features!(
[INFO] [stdout] 950 | |     /// The default shared reference type for `Supercow`.
[INFO] [stdout] 951 | |     ///
[INFO] [stdout] 952 | |     /// This requires the shared reference type to be `Clone`, `Send`, and
[INFO] [stdout] ...   |
[INFO] [stdout] 957 | |     /// See also `NonSyncFeatures`.
[INFO] [stdout] 958 | |     pub trait DefaultFeatures: Clone, TwoStepShared(TwoStepArc), Send, Sync);
[INFO] [stdout]     | |____________________________________________________________________________- in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]     = note: for more information, see <https://doc.rust-lang.org/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout]     = note: this warning originates in the macro `supercow_features` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/lib.rs:925:17
[INFO] [stdout]     |
[INFO] [stdout] 925 |           for Box<$feature_name<'a> + 'a>
[INFO] [stdout]     |                   ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 959 | / supercow_features!(
[INFO] [stdout] 960 | |     /// The shared reference type for `NonSyncSupercow`.
[INFO] [stdout] 961 | |     ///
[INFO] [stdout] 962 | |     /// Unlike `DefaultFeatures`, this only requires the shared reference type
[INFO] [stdout] 963 | |     /// to be `Clone`, thus permitting `Rc`.
[INFO] [stdout] 964 | |     pub trait NonSyncFeatures: Clone, TwoStepShared(TwoStepRc));
[INFO] [stdout]     | |_______________________________________________________________- in this macro invocation
[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/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout]     = note: this warning originates in the macro `supercow_features` (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/lib.rs:1113:40
[INFO] [stdout]      |
[INFO] [stdout] 1113 |                           SHARED = Box<DefaultFeatures<'static> + 'static>> =
[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/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] 1113 |                           SHARED = Box<dyn DefaultFeatures<'static> + 'static>> =
[INFO] [stdout]      |                                        +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]     --> src/lib.rs:1118:41
[INFO] [stdout]      |
[INFO] [stdout] 1118 |     Phantomcow<'a, OWNED, BORROWED, Box<NonSyncFeatures<'static> + 'static>,
[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/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] 1118 |     Phantomcow<'a, OWNED, BORROWED, Box<dyn NonSyncFeatures<'static> + 'static>,
[INFO] [stdout]      |                                         +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]     --> src/lib.rs:1119:39
[INFO] [stdout]      |
[INFO] [stdout] 1119 |              InlineStorage<OWNED, Box<NonSyncFeatures<'static> + 'static>>>;
[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/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] 1119 |              InlineStorage<OWNED, Box<dyn NonSyncFeatures<'static> + 'static>>>;
[INFO] [stdout]      |                                       +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]     --> src/lib.rs:1102:34
[INFO] [stdout]      |
[INFO] [stdout] 1102 |                     SHARED = Box<DefaultFeatures<'static> + 'static>,
[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/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] 1102 |                     SHARED = Box<dyn DefaultFeatures<'static> + 'static>,
[INFO] [stdout]      |                                  +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]     --> src/lib.rs:1108:41
[INFO] [stdout]      |
[INFO] [stdout] 1108 |     Phantomcow<'a, OWNED, BORROWED, Box<NonSyncFeatures<'static> + 'static>,
[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/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] 1108 |     Phantomcow<'a, OWNED, BORROWED, Box<dyn NonSyncFeatures<'static> + 'static>,
[INFO] [stdout]      |                                         +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/lib.rs:985:18
[INFO] [stdout]     |
[INFO] [stdout] 985 |              Box<NonSyncFeatures<'static> + 'static>,
[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/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] 985 |              Box<dyn NonSyncFeatures<'static> + 'static>,
[INFO] [stdout]     |                  +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/lib.rs:886:43
[INFO] [stdout]     |
[INFO] [stdout] 886 |               fn $clone_boxed(&self) -> Box<$feature_name<'a> + 'a>;
[INFO] [stdout]     |                                             ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 959 | / supercow_features!(
[INFO] [stdout] 960 | |     /// The shared reference type for `NonSyncSupercow`.
[INFO] [stdout] 961 | |     ///
[INFO] [stdout] 962 | |     /// Unlike `DefaultFeatures`, this only requires the shared reference type
[INFO] [stdout] 963 | |     /// to be `Clone`, thus permitting `Rc`.
[INFO] [stdout] 964 | |     pub trait NonSyncFeatures: Clone, TwoStepShared(TwoStepRc));
[INFO] [stdout]     | |_______________________________________________________________- in this macro invocation
[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/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout]     = note: this warning originates in the macro `supercow_features` (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/lib.rs:898:43
[INFO] [stdout]     |
[INFO] [stdout] 898 |               fn $clone_boxed(&self) -> Box<$feature_name<'a> + 'a> {
[INFO] [stdout]     |                                             ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 959 | / supercow_features!(
[INFO] [stdout] 960 | |     /// The shared reference type for `NonSyncSupercow`.
[INFO] [stdout] 961 | |     ///
[INFO] [stdout] 962 | |     /// Unlike `DefaultFeatures`, this only requires the shared reference type
[INFO] [stdout] 963 | |     /// to be `Clone`, thus permitting `Rc`.
[INFO] [stdout] 964 | |     pub trait NonSyncFeatures: Clone, TwoStepShared(TwoStepRc));
[INFO] [stdout]     | |_______________________________________________________________- in this macro invocation
[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/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout]     = note: this warning originates in the macro `supercow_features` (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/lib.rs:1022:34
[INFO] [stdout]      |
[INFO] [stdout] 1022 |                     SHARED = Box<DefaultFeatures<'static> + 'static>,
[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/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] 1022 |                     SHARED = Box<dyn DefaultFeatures<'static> + 'static>,
[INFO] [stdout]      |                                  +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]     --> src/lib.rs:1003:18
[INFO] [stdout]      |
[INFO] [stdout] 1003 |              Box<NonSyncFeatures<'static> + 'static>,
[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/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] 1003 |              Box<dyn NonSyncFeatures<'static> + 'static>,
[INFO] [stdout]      |                  +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]     --> src/lib.rs:1004:39
[INFO] [stdout]      |
[INFO] [stdout] 1004 |              InlineStorage<OWNED, Box<NonSyncFeatures<'static> + 'static>>>;
[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/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] 1004 |              InlineStorage<OWNED, Box<dyn NonSyncFeatures<'static> + 'static>>>;
[INFO] [stdout]      |                                       +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the type `*const T` does not permit being left uninitialized
[INFO] [stdout]    --> src/ext.rs:515:18
[INFO] [stdout]     |
[INFO] [stdout] 515 |         unsafe { mem::uninitialized() }
[INFO] [stdout]     |                  ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |                  |
[INFO] [stdout]     |                  this code causes undefined behavior when executed
[INFO] [stdout]     |                  help: use `MaybeUninit<T>` instead, and only call `assume_init` after initialization is done
[INFO] [stdout]     |
[INFO] [stdout]     = note: raw pointers must be initialized
[INFO] [stdout]     = note: `#[warn(invalid_value)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 2.07s
[INFO] running `Command { std: "docker" "inspect" "63fe895d1412c4004b6fd3e8f356679d20f08445492dd1d3d5c77bd1e36d4989", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "63fe895d1412c4004b6fd3e8f356679d20f08445492dd1d3d5c77bd1e36d4989", kill_on_drop: false }`
[INFO] [stdout] 63fe895d1412c4004b6fd3e8f356679d20f08445492dd1d3d5c77bd1e36d4989
