[INFO] fetching crate quickercheck 0.2.0...
[INFO] checking quickercheck-0.2.0 against master#e6e4f7ed1589e03bc2f6c5931c1a72e7947e8682 for beta-170-4
[INFO] extracting crate quickercheck 0.2.0 into /workspace/builds/worker-4-tc2/source
[INFO] validating manifest of crates.io crate quickercheck 0.2.0 on toolchain e6e4f7ed1589e03bc2f6c5931c1a72e7947e8682
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+e6e4f7ed1589e03bc2f6c5931c1a72e7947e8682" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate quickercheck 0.2.0
[INFO] finished tweaking crates.io crate quickercheck 0.2.0
[INFO] tweaked toml for crates.io crate quickercheck 0.2.0 written to /workspace/builds/worker-4-tc2/source/Cargo.toml
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" __CARGO_TEST_CHANNEL_OVERRIDE_DO_NOT_USE_THIS="nightly" "/workspace/cargo-home/bin/cargo" "+e6e4f7ed1589e03bc2f6c5931c1a72e7947e8682" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+e6e4f7ed1589e03bc2f6c5931c1a72e7947e8682" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:19e73879b68f455e41552ea35293514db52ea292d993f571636dbffedb77a1ee" "/opt/rustwide/cargo-home/bin/cargo" "+e6e4f7ed1589e03bc2f6c5931c1a72e7947e8682" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 11be2f65b695aeeb33f59af04f829a216932ba62ccae65aea3846cd31051bc55
[INFO] running `Command { std: "docker" "start" "-a" "11be2f65b695aeeb33f59af04f829a216932ba62ccae65aea3846cd31051bc55", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "11be2f65b695aeeb33f59af04f829a216932ba62ccae65aea3846cd31051bc55", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "11be2f65b695aeeb33f59af04f829a216932ba62ccae65aea3846cd31051bc55", kill_on_drop: false }`
[INFO] [stdout] 11be2f65b695aeeb33f59af04f829a216932ba62ccae65aea3846cd31051bc55
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "RUSTDOCFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:19e73879b68f455e41552ea35293514db52ea292d993f571636dbffedb77a1ee" "/opt/rustwide/cargo-home/bin/cargo" "+e6e4f7ed1589e03bc2f6c5931c1a72e7947e8682" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 4e792d5ee5f7a2eb561a0aa92a6f020cb0e43cf857d9692fd18b5ce661c3b579
[INFO] running `Command { std: "docker" "start" "-a" "4e792d5ee5f7a2eb561a0aa92a6f020cb0e43cf857d9692fd18b5ce661c3b579", kill_on_drop: false }`
[INFO] [stderr]    Compiling winapi-build v0.1.1
[INFO] [stderr]    Compiling num-integer v0.1.45
[INFO] [stderr]     Checking winapi v0.2.8
[INFO] [stderr]    Compiling log v0.4.18
[INFO] [stderr]     Checking rustc-serialize v0.3.24
[INFO] [stderr]    Compiling num-iter v0.1.43
[INFO] [stderr]     Checking regex-syntax v0.3.9
[INFO] [stderr]     Checking utf8-ranges v0.1.3
[INFO] [stderr]     Checking rand v0.4.6
[INFO] [stderr]     Checking memchr v0.1.11
[INFO] [stderr]     Checking aho-corasick v0.5.3
[INFO] [stderr]    Compiling kernel32-sys v0.2.2
[INFO] [stderr]     Checking thread-id v2.0.0
[INFO] [stderr]     Checking log v0.3.9
[INFO] [stderr]     Checking thread_local v0.2.7
[INFO] [stderr]     Checking rand v0.3.23
[INFO] [stderr]     Checking regex v0.1.80
[INFO] [stderr]     Checking env_logger v0.3.5
[INFO] [stderr]     Checking num-bigint v0.1.44
[INFO] [stderr]     Checking num-complex v0.1.43
[INFO] [stderr]     Checking num-rational v0.1.42
[INFO] [stderr]     Checking num v0.1.42
[INFO] [stderr]     Checking quickercheck v0.2.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: anonymous parameters are deprecated and will be removed in the next edition
[INFO] [stdout]   --> src/generate.rs:39:38
[INFO] [stdout]    |
[INFO] [stdout] 39 |     fn generate<R: rand::Rng>(&self, &mut GenerateCtx<R>) -> <Self as Generator>::Output;
[INFO] [stdout]    |                                      ^^^^^^^^^^^^^^^^^^^ help: try naming the parameter or explicitly ignoring it: `_: &mut GenerateCtx<R>`
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2018!
[INFO] [stdout]    = note: for more information, see issue #41686 <https://github.com/rust-lang/rust/issues/41686>
[INFO] [stdout]    = note: `#[warn(anonymous_parameters)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around type
[INFO] [stdout]    --> src/arbitrary.rs:102:67
[INFO] [stdout]     |
[INFO] [stdout] 102 |                   where $container<$($placeholder),*>: FromIterator<($($placeholder),*)> + IntoIterator<Item=($($placeholder),*)>
[INFO] [stdout]     |                                                                     ^^^            ^^^^
[INFO] [stdout] ...
[INFO] [stdout] 119 | / generic_impls! {
[INFO] [stdout] 120 | |     Vec<T>,
[INFO] [stdout] 121 | |     BTreeMap<K, V>,
[INFO] [stdout] 122 | |     BTreeSet<T>,
[INFO] [stdout] ...   |
[INFO] [stdout] 127 | |     VecDeque<T>
[INFO] [stdout] 128 | | }
[INFO] [stdout]     | | -
[INFO] [stdout]     | |_|
[INFO] [stdout]     | |_in this macro invocation
[INFO] [stdout]     |   in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_parens)]` on by default
[INFO] [stdout]     = note: this warning originates in the macro `generic_impls` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]     |
[INFO] [stdout] 102 -                 where $container<$($placeholder),*>: FromIterator<($($placeholder),*)> + IntoIterator<Item=($($placeholder),*)>
[INFO] [stdout] 102 +                 where $container<$($placeholder),*>: FromIterator<$placeholder> + IntoIterator<Item=($($placeholder),*)>
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around type
[INFO] [stdout]    --> src/arbitrary.rs:102:108
[INFO] [stdout]     |
[INFO] [stdout] 102 |                   where $container<$($placeholder),*>: FromIterator<($($placeholder),*)> + IntoIterator<Item=($($placeholder),*)>
[INFO] [stdout]     |                                                                                                              ^^^            ^^^^
[INFO] [stdout] ...
[INFO] [stdout] 119 | / generic_impls! {
[INFO] [stdout] 120 | |     Vec<T>,
[INFO] [stdout] 121 | |     BTreeMap<K, V>,
[INFO] [stdout] 122 | |     BTreeSet<T>,
[INFO] [stdout] ...   |
[INFO] [stdout] 127 | |     VecDeque<T>
[INFO] [stdout] 128 | | }
[INFO] [stdout]     | | -
[INFO] [stdout]     | |_|
[INFO] [stdout]     | |_in this macro invocation
[INFO] [stdout]     |   in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout]     = note: this warning originates in the macro `generic_impls` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]     |
[INFO] [stdout] 102 -                 where $container<$($placeholder),*>: FromIterator<($($placeholder),*)> + IntoIterator<Item=($($placeholder),*)>
[INFO] [stdout] 102 +                 where $container<$($placeholder),*>: FromIterator<($($placeholder),*)> + IntoIterator<Item=$placeholder>
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around type
[INFO] [stdout]    --> src/arbitrary.rs:104:88
[INFO] [stdout]     |
[INFO] [stdout] 104 |                   type Generator = FromIteratorGenerator<$container<$($placeholder),*>, <($($placeholder),*) as Arbitrary>::Generator>;
[INFO] [stdout]     |                                                                                          ^^^            ^^^^
[INFO] [stdout] ...
[INFO] [stdout] 119 | / generic_impls! {
[INFO] [stdout] 120 | |     Vec<T>,
[INFO] [stdout] 121 | |     BTreeMap<K, V>,
[INFO] [stdout] 122 | |     BTreeSet<T>,
[INFO] [stdout] ...   |
[INFO] [stdout] 127 | |     VecDeque<T>
[INFO] [stdout] 128 | | }
[INFO] [stdout]     | | -
[INFO] [stdout]     | |_|
[INFO] [stdout]     | |_in this macro invocation
[INFO] [stdout]     |   in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout]     = note: this warning originates in the macro `generic_impls` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]     |
[INFO] [stdout] 104 -                 type Generator = FromIteratorGenerator<$container<$($placeholder),*>, <($($placeholder),*) as Arbitrary>::Generator>;
[INFO] [stdout] 104 +                 type Generator = FromIteratorGenerator<$container<$($placeholder),*>, <$placeholder as Arbitrary>::Generator>;
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around type
[INFO] [stdout]    --> src/arbitrary.rs:105:84
[INFO] [stdout]     |
[INFO] [stdout] 105 |                   type Shrink = FromIteratorShrinker<$container<$($placeholder),*>, <($($placeholder),*) as Arbitrary>::Shrink>;
[INFO] [stdout]     |                                                                                      ^^^            ^^^^
[INFO] [stdout] ...
[INFO] [stdout] 119 | / generic_impls! {
[INFO] [stdout] 120 | |     Vec<T>,
[INFO] [stdout] 121 | |     BTreeMap<K, V>,
[INFO] [stdout] 122 | |     BTreeSet<T>,
[INFO] [stdout] ...   |
[INFO] [stdout] 127 | |     VecDeque<T>
[INFO] [stdout] 128 | | }
[INFO] [stdout]     | | -
[INFO] [stdout]     | |_|
[INFO] [stdout]     | |_in this macro invocation
[INFO] [stdout]     |   in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout]     = note: this warning originates in the macro `generic_impls` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]     |
[INFO] [stdout] 105 -                 type Shrink = FromIteratorShrinker<$container<$($placeholder),*>, <($($placeholder),*) as Arbitrary>::Shrink>;
[INFO] [stdout] 105 +                 type Shrink = FromIteratorShrinker<$container<$($placeholder),*>, <$placeholder as Arbitrary>::Shrink>;
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: anonymous parameters are deprecated and will be removed in the next edition
[INFO] [stdout]   --> src/generate.rs:39:38
[INFO] [stdout]    |
[INFO] [stdout] 39 |     fn generate<R: rand::Rng>(&self, &mut GenerateCtx<R>) -> <Self as Generator>::Output;
[INFO] [stdout]    |                                      ^^^^^^^^^^^^^^^^^^^ help: try naming the parameter or explicitly ignoring it: `_: &mut GenerateCtx<R>`
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2018!
[INFO] [stdout]    = note: for more information, see issue #41686 <https://github.com/rust-lang/rust/issues/41686>
[INFO] [stdout]    = note: `#[warn(anonymous_parameters)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around type
[INFO] [stdout]    --> src/arbitrary.rs:102:67
[INFO] [stdout]     |
[INFO] [stdout] 102 |                   where $container<$($placeholder),*>: FromIterator<($($placeholder),*)> + IntoIterator<Item=($($placeholder),*)>
[INFO] [stdout]     |                                                                     ^^^            ^^^^
[INFO] [stdout] ...
[INFO] [stdout] 119 | / generic_impls! {
[INFO] [stdout] 120 | |     Vec<T>,
[INFO] [stdout] 121 | |     BTreeMap<K, V>,
[INFO] [stdout] 122 | |     BTreeSet<T>,
[INFO] [stdout] ...   |
[INFO] [stdout] 127 | |     VecDeque<T>
[INFO] [stdout] 128 | | }
[INFO] [stdout]     | | -
[INFO] [stdout]     | |_|
[INFO] [stdout]     | |_in this macro invocation
[INFO] [stdout]     |   in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_parens)]` on by default
[INFO] [stdout]     = note: this warning originates in the macro `generic_impls` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]     |
[INFO] [stdout] 102 -                 where $container<$($placeholder),*>: FromIterator<($($placeholder),*)> + IntoIterator<Item=($($placeholder),*)>
[INFO] [stdout] 102 +                 where $container<$($placeholder),*>: FromIterator<$placeholder> + IntoIterator<Item=($($placeholder),*)>
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around type
[INFO] [stdout]    --> src/arbitrary.rs:102:108
[INFO] [stdout]     |
[INFO] [stdout] 102 |                   where $container<$($placeholder),*>: FromIterator<($($placeholder),*)> + IntoIterator<Item=($($placeholder),*)>
[INFO] [stdout]     |                                                                                                              ^^^            ^^^^
[INFO] [stdout] ...
[INFO] [stdout] 119 | / generic_impls! {
[INFO] [stdout] 120 | |     Vec<T>,
[INFO] [stdout] 121 | |     BTreeMap<K, V>,
[INFO] [stdout] 122 | |     BTreeSet<T>,
[INFO] [stdout] ...   |
[INFO] [stdout] 127 | |     VecDeque<T>
[INFO] [stdout] 128 | | }
[INFO] [stdout]     | | -
[INFO] [stdout]     | |_|
[INFO] [stdout]     | |_in this macro invocation
[INFO] [stdout]     |   in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout]     = note: this warning originates in the macro `generic_impls` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]     |
[INFO] [stdout] 102 -                 where $container<$($placeholder),*>: FromIterator<($($placeholder),*)> + IntoIterator<Item=($($placeholder),*)>
[INFO] [stdout] 102 +                 where $container<$($placeholder),*>: FromIterator<($($placeholder),*)> + IntoIterator<Item=$placeholder>
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around type
[INFO] [stdout]    --> src/arbitrary.rs:104:88
[INFO] [stdout]     |
[INFO] [stdout] 104 |                   type Generator = FromIteratorGenerator<$container<$($placeholder),*>, <($($placeholder),*) as Arbitrary>::Generator>;
[INFO] [stdout]     |                                                                                          ^^^            ^^^^
[INFO] [stdout] ...
[INFO] [stdout] 119 | / generic_impls! {
[INFO] [stdout] 120 | |     Vec<T>,
[INFO] [stdout] 121 | |     BTreeMap<K, V>,
[INFO] [stdout] 122 | |     BTreeSet<T>,
[INFO] [stdout] ...   |
[INFO] [stdout] 127 | |     VecDeque<T>
[INFO] [stdout] 128 | | }
[INFO] [stdout]     | | -
[INFO] [stdout]     | |_|
[INFO] [stdout]     | |_in this macro invocation
[INFO] [stdout]     |   in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout]     = note: this warning originates in the macro `generic_impls` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]     |
[INFO] [stdout] 104 -                 type Generator = FromIteratorGenerator<$container<$($placeholder),*>, <($($placeholder),*) as Arbitrary>::Generator>;
[INFO] [stdout] 104 +                 type Generator = FromIteratorGenerator<$container<$($placeholder),*>, <$placeholder as Arbitrary>::Generator>;
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around type
[INFO] [stdout]    --> src/arbitrary.rs:105:84
[INFO] [stdout]     |
[INFO] [stdout] 105 |                   type Shrink = FromIteratorShrinker<$container<$($placeholder),*>, <($($placeholder),*) as Arbitrary>::Shrink>;
[INFO] [stdout]     |                                                                                      ^^^            ^^^^
[INFO] [stdout] ...
[INFO] [stdout] 119 | / generic_impls! {
[INFO] [stdout] 120 | |     Vec<T>,
[INFO] [stdout] 121 | |     BTreeMap<K, V>,
[INFO] [stdout] 122 | |     BTreeSet<T>,
[INFO] [stdout] ...   |
[INFO] [stdout] 127 | |     VecDeque<T>
[INFO] [stdout] 128 | | }
[INFO] [stdout]     | | -
[INFO] [stdout]     | |_|
[INFO] [stdout]     | |_in this macro invocation
[INFO] [stdout]     |   in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout]     = note: this warning originates in the macro `generic_impls` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]     |
[INFO] [stdout] 105 -                 type Shrink = FromIteratorShrinker<$container<$($placeholder),*>, <($($placeholder),*) as Arbitrary>::Shrink>;
[INFO] [stdout] 105 +                 type Shrink = FromIteratorShrinker<$container<$($placeholder),*>, <$placeholder as Arbitrary>::Shrink>;
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary trailing semicolon
[INFO] [stdout]    --> src/testable.rs:198:60
[INFO] [stdout]     |
[INFO] [stdout] 198 |         fn simple_prop() -> TestStatus { TestStatus::Pass };
[INFO] [stdout]     |                                                            ^ help: remove this semicolon
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(redundant_semicolons)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]  --> src/rose.rs:7:23
[INFO] [stdout]   |
[INFO] [stdout] 7 |     pub iterator: Box<Iterator<Item=Rose<T>>>
[INFO] [stdout]   |                       ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]   = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout]   = note: `#[warn(bare_trait_objects)]` on by default
[INFO] [stdout] help: use `dyn`
[INFO] [stdout]   |
[INFO] [stdout] 7 |     pub iterator: Box<dyn Iterator<Item=Rose<T>>>
[INFO] [stdout]   |                       +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/shrink.rs:65:33
[INFO] [stdout]    |
[INFO] [stdout] 65 |             type Iterator = Box<Iterator<Item=Self::Item>>;
[INFO] [stdout]    |                                 ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 89 | macro_tuples_impl!{tuple_impls}
[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/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout]    = note: this warning originates in the macro `tuple_impls` which comes from the expansion of the macro `macro_tuples_impl` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] help: use `dyn`
[INFO] [stdout]    |
[INFO] [stdout] 65 |             type Iterator = Box<dyn Iterator<Item=Self::Item>>;
[INFO] [stdout]    |                                 +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/shrink.rs:65:33
[INFO] [stdout]    |
[INFO] [stdout] 65 |             type Iterator = Box<Iterator<Item=Self::Item>>;
[INFO] [stdout]    |                                 ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 89 | macro_tuples_impl!{tuple_impls}
[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/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout]    = note: this warning originates in the macro `tuple_impls` which comes from the expansion of the macro `macro_tuples_impl` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] help: use `dyn`
[INFO] [stdout]    |
[INFO] [stdout] 65 |             type Iterator = Box<dyn Iterator<Item=Self::Item>>;
[INFO] [stdout]    |                                 +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/shrink.rs:65:33
[INFO] [stdout]    |
[INFO] [stdout] 65 |             type Iterator = Box<Iterator<Item=Self::Item>>;
[INFO] [stdout]    |                                 ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 89 | macro_tuples_impl!{tuple_impls}
[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/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout]    = note: this warning originates in the macro `tuple_impls` which comes from the expansion of the macro `macro_tuples_impl` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] help: use `dyn`
[INFO] [stdout]    |
[INFO] [stdout] 65 |             type Iterator = Box<dyn Iterator<Item=Self::Item>>;
[INFO] [stdout]    |                                 +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/shrink.rs:65:33
[INFO] [stdout]    |
[INFO] [stdout] 65 |             type Iterator = Box<Iterator<Item=Self::Item>>;
[INFO] [stdout]    |                                 ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 89 | macro_tuples_impl!{tuple_impls}
[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/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout]    = note: this warning originates in the macro `tuple_impls` which comes from the expansion of the macro `macro_tuples_impl` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] help: use `dyn`
[INFO] [stdout]    |
[INFO] [stdout] 65 |             type Iterator = Box<dyn Iterator<Item=Self::Item>>;
[INFO] [stdout]    |                                 +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/shrink.rs:65:33
[INFO] [stdout]    |
[INFO] [stdout] 65 |             type Iterator = Box<Iterator<Item=Self::Item>>;
[INFO] [stdout]    |                                 ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 89 | macro_tuples_impl!{tuple_impls}
[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/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout]    = note: this warning originates in the macro `tuple_impls` which comes from the expansion of the macro `macro_tuples_impl` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] help: use `dyn`
[INFO] [stdout]    |
[INFO] [stdout] 65 |             type Iterator = Box<dyn Iterator<Item=Self::Item>>;
[INFO] [stdout]    |                                 +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/shrink.rs:65:33
[INFO] [stdout]    |
[INFO] [stdout] 65 |             type Iterator = Box<Iterator<Item=Self::Item>>;
[INFO] [stdout]    |                                 ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 89 | macro_tuples_impl!{tuple_impls}
[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/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout]    = note: this warning originates in the macro `tuple_impls` which comes from the expansion of the macro `macro_tuples_impl` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] help: use `dyn`
[INFO] [stdout]    |
[INFO] [stdout] 65 |             type Iterator = Box<dyn Iterator<Item=Self::Item>>;
[INFO] [stdout]    |                                 +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/shrink.rs:65:33
[INFO] [stdout]    |
[INFO] [stdout] 65 |             type Iterator = Box<Iterator<Item=Self::Item>>;
[INFO] [stdout]    |                                 ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 89 | macro_tuples_impl!{tuple_impls}
[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/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout]    = note: this warning originates in the macro `tuple_impls` which comes from the expansion of the macro `macro_tuples_impl` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] help: use `dyn`
[INFO] [stdout]    |
[INFO] [stdout] 65 |             type Iterator = Box<dyn Iterator<Item=Self::Item>>;
[INFO] [stdout]    |                                 +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/shrink.rs:65:33
[INFO] [stdout]    |
[INFO] [stdout] 65 |             type Iterator = Box<Iterator<Item=Self::Item>>;
[INFO] [stdout]    |                                 ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 89 | macro_tuples_impl!{tuple_impls}
[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/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout]    = note: this warning originates in the macro `tuple_impls` which comes from the expansion of the macro `macro_tuples_impl` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] help: use `dyn`
[INFO] [stdout]    |
[INFO] [stdout] 65 |             type Iterator = Box<dyn Iterator<Item=Self::Item>>;
[INFO] [stdout]    |                                 +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/shrink.rs:65:33
[INFO] [stdout]    |
[INFO] [stdout] 65 |             type Iterator = Box<Iterator<Item=Self::Item>>;
[INFO] [stdout]    |                                 ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 89 | macro_tuples_impl!{tuple_impls}
[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/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout]    = note: this warning originates in the macro `tuple_impls` which comes from the expansion of the macro `macro_tuples_impl` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] help: use `dyn`
[INFO] [stdout]    |
[INFO] [stdout] 65 |             type Iterator = Box<dyn Iterator<Item=Self::Item>>;
[INFO] [stdout]    |                                 +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/shrink.rs:65:33
[INFO] [stdout]    |
[INFO] [stdout] 65 |             type Iterator = Box<Iterator<Item=Self::Item>>;
[INFO] [stdout]    |                                 ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 89 | macro_tuples_impl!{tuple_impls}
[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/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout]    = note: this warning originates in the macro `tuple_impls` which comes from the expansion of the macro `macro_tuples_impl` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] help: use `dyn`
[INFO] [stdout]    |
[INFO] [stdout] 65 |             type Iterator = Box<dyn Iterator<Item=Self::Item>>;
[INFO] [stdout]    |                                 +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/shrink.rs:65:33
[INFO] [stdout]    |
[INFO] [stdout] 65 |             type Iterator = Box<Iterator<Item=Self::Item>>;
[INFO] [stdout]    |                                 ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 89 | macro_tuples_impl!{tuple_impls}
[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/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout]    = note: this warning originates in the macro `tuple_impls` which comes from the expansion of the macro `macro_tuples_impl` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] help: use `dyn`
[INFO] [stdout]    |
[INFO] [stdout] 65 |             type Iterator = Box<dyn Iterator<Item=Self::Item>>;
[INFO] [stdout]    |                                 +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/shrink.rs:65:33
[INFO] [stdout]    |
[INFO] [stdout] 65 |             type Iterator = Box<Iterator<Item=Self::Item>>;
[INFO] [stdout]    |                                 ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 89 | macro_tuples_impl!{tuple_impls}
[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/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout]    = note: this warning originates in the macro `tuple_impls` which comes from the expansion of the macro `macro_tuples_impl` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] help: use `dyn`
[INFO] [stdout]    |
[INFO] [stdout] 65 |             type Iterator = Box<dyn Iterator<Item=Self::Item>>;
[INFO] [stdout]    |                                 +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/shrink.rs:105:37
[INFO] [stdout]     |
[INFO] [stdout] 105 |                 type Iterator = Box<Iterator<Item=Self::Item>>;
[INFO] [stdout]     |                                     ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 132 | int_impls! { i8, i16, i32, i64, isize }
[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/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout]     = note: this warning originates in the macro `int_impls` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] help: use `dyn`
[INFO] [stdout]     |
[INFO] [stdout] 105 |                 type Iterator = Box<dyn Iterator<Item=Self::Item>>;
[INFO] [stdout]     |                                     +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/shrink.rs:148:37
[INFO] [stdout]     |
[INFO] [stdout] 148 |                 type Iterator = Box<Iterator<Item=Self::Item>>;
[INFO] [stdout]     |                                     ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 163 | uint_impls! { u8, u16, u32, u64, usize }
[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/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout]     = note: this warning originates in the macro `uint_impls` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] help: use `dyn`
[INFO] [stdout]     |
[INFO] [stdout] 148 |                 type Iterator = Box<dyn Iterator<Item=Self::Item>>;
[INFO] [stdout]     |                                     +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/shrink.rs:185:25
[INFO] [stdout]     |
[INFO] [stdout] 185 |     type Iterator = Box<Iterator<Item=Self::Item>>;
[INFO] [stdout]     |                         ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]     = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] help: use `dyn`
[INFO] [stdout]     |
[INFO] [stdout] 185 |     type Iterator = Box<dyn Iterator<Item=Self::Item>>;
[INFO] [stdout]     |                         +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/shrink.rs:274:25
[INFO] [stdout]     |
[INFO] [stdout] 274 |     type Iterator = Box<Iterator<Item=bool>>;
[INFO] [stdout]     |                         ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]     = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] help: use `dyn`
[INFO] [stdout]     |
[INFO] [stdout] 274 |     type Iterator = Box<dyn Iterator<Item=bool>>;
[INFO] [stdout]     |                         +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/rose.rs:78:28
[INFO] [stdout]    |
[INFO] [stdout] 78 |     where F: Fn(&T) -> Box<Iterator<Item=T>> + '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/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] help: use `dyn`
[INFO] [stdout]    |
[INFO] [stdout] 78 |     where F: Fn(&T) -> Box<dyn Iterator<Item=T>> + 'static
[INFO] [stdout]    |                            +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/rose.rs:89:28
[INFO] [stdout]    |
[INFO] [stdout] 89 |     where F: Fn(&T) -> Box<Iterator<Item=T>> + '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/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] help: use `dyn`
[INFO] [stdout]    |
[INFO] [stdout] 89 |     where F: Fn(&T) -> Box<dyn Iterator<Item=T>> + 'static
[INFO] [stdout]    |                            +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/rose.rs:109:32
[INFO] [stdout]     |
[INFO] [stdout] 109 |     where F: Fn(&S, &T) -> Box<Iterator<Item=T>> + '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/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] help: use `dyn`
[INFO] [stdout]     |
[INFO] [stdout] 109 |     where F: Fn(&S, &T) -> Box<dyn Iterator<Item=T>> + 'static
[INFO] [stdout]     |                                +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/rose.rs:121:32
[INFO] [stdout]     |
[INFO] [stdout] 121 |     where F: Fn(&S, &T) -> Box<Iterator<Item=T>> + '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/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] help: use `dyn`
[INFO] [stdout]     |
[INFO] [stdout] 121 |     where F: Fn(&S, &T) -> Box<dyn Iterator<Item=T>> + 'static
[INFO] [stdout]     |                                +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/rose.rs:33:31
[INFO] [stdout]    |
[INFO] [stdout] 33 |     fn iterator(&self) -> Box<Iterator<Item=Self>>;
[INFO] [stdout]    |                               ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] help: use `dyn`
[INFO] [stdout]    |
[INFO] [stdout] 33 |     fn iterator(&self) -> Box<dyn Iterator<Item=Self>>;
[INFO] [stdout]    |                               +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/rose.rs:93:31
[INFO] [stdout]    |
[INFO] [stdout] 93 |     fn iterator(&self) -> Box<Iterator<Item=Self>> {
[INFO] [stdout]    |                               ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] help: use `dyn`
[INFO] [stdout]    |
[INFO] [stdout] 93 |     fn iterator(&self) -> Box<dyn Iterator<Item=Self>> {
[INFO] [stdout]    |                               +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/rose.rs:125:31
[INFO] [stdout]     |
[INFO] [stdout] 125 |     fn iterator(&self) -> Box<Iterator<Item=Self>> {
[INFO] [stdout]     |                               ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]     = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] help: use `dyn`
[INFO] [stdout]     |
[INFO] [stdout] 125 |     fn iterator(&self) -> Box<dyn Iterator<Item=Self>> {
[INFO] [stdout]     |                               +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]  --> src/rose.rs:7:23
[INFO] [stdout]   |
[INFO] [stdout] 7 |     pub iterator: Box<Iterator<Item=Rose<T>>>
[INFO] [stdout]   |                       ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]   = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout]   = note: `#[warn(bare_trait_objects)]` on by default
[INFO] [stdout] help: use `dyn`
[INFO] [stdout]   |
[INFO] [stdout] 7 |     pub iterator: Box<dyn Iterator<Item=Rose<T>>>
[INFO] [stdout]   |                       +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/shrink.rs:65:33
[INFO] [stdout]    |
[INFO] [stdout] 65 |             type Iterator = Box<Iterator<Item=Self::Item>>;
[INFO] [stdout]    |                                 ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 89 | macro_tuples_impl!{tuple_impls}
[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/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout]    = note: this warning originates in the macro `tuple_impls` which comes from the expansion of the macro `macro_tuples_impl` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] help: use `dyn`
[INFO] [stdout]    |
[INFO] [stdout] 65 |             type Iterator = Box<dyn Iterator<Item=Self::Item>>;
[INFO] [stdout]    |                                 +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/shrink.rs:65:33
[INFO] [stdout]    |
[INFO] [stdout] 65 |             type Iterator = Box<Iterator<Item=Self::Item>>;
[INFO] [stdout]    |                                 ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 89 | macro_tuples_impl!{tuple_impls}
[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/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout]    = note: this warning originates in the macro `tuple_impls` which comes from the expansion of the macro `macro_tuples_impl` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] help: use `dyn`
[INFO] [stdout]    |
[INFO] [stdout] 65 |             type Iterator = Box<dyn Iterator<Item=Self::Item>>;
[INFO] [stdout]    |                                 +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/shrink.rs:65:33
[INFO] [stdout]    |
[INFO] [stdout] 65 |             type Iterator = Box<Iterator<Item=Self::Item>>;
[INFO] [stdout]    |                                 ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 89 | macro_tuples_impl!{tuple_impls}
[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/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout]    = note: this warning originates in the macro `tuple_impls` which comes from the expansion of the macro `macro_tuples_impl` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] help: use `dyn`
[INFO] [stdout]    |
[INFO] [stdout] 65 |             type Iterator = Box<dyn Iterator<Item=Self::Item>>;
[INFO] [stdout]    |                                 +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/shrink.rs:65:33
[INFO] [stdout]    |
[INFO] [stdout] 65 |             type Iterator = Box<Iterator<Item=Self::Item>>;
[INFO] [stdout]    |                                 ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 89 | macro_tuples_impl!{tuple_impls}
[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/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout]    = note: this warning originates in the macro `tuple_impls` which comes from the expansion of the macro `macro_tuples_impl` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] help: use `dyn`
[INFO] [stdout]    |
[INFO] [stdout] 65 |             type Iterator = Box<dyn Iterator<Item=Self::Item>>;
[INFO] [stdout]    |                                 +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/shrink.rs:65:33
[INFO] [stdout]    |
[INFO] [stdout] 65 |             type Iterator = Box<Iterator<Item=Self::Item>>;
[INFO] [stdout]    |                                 ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 89 | macro_tuples_impl!{tuple_impls}
[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/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout]    = note: this warning originates in the macro `tuple_impls` which comes from the expansion of the macro `macro_tuples_impl` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] help: use `dyn`
[INFO] [stdout]    |
[INFO] [stdout] 65 |             type Iterator = Box<dyn Iterator<Item=Self::Item>>;
[INFO] [stdout]    |                                 +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/shrink.rs:65:33
[INFO] [stdout]    |
[INFO] [stdout] 65 |             type Iterator = Box<Iterator<Item=Self::Item>>;
[INFO] [stdout]    |                                 ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 89 | macro_tuples_impl!{tuple_impls}
[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/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout]    = note: this warning originates in the macro `tuple_impls` which comes from the expansion of the macro `macro_tuples_impl` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] help: use `dyn`
[INFO] [stdout]    |
[INFO] [stdout] 65 |             type Iterator = Box<dyn Iterator<Item=Self::Item>>;
[INFO] [stdout]    |                                 +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/shrink.rs:65:33
[INFO] [stdout]    |
[INFO] [stdout] 65 |             type Iterator = Box<Iterator<Item=Self::Item>>;
[INFO] [stdout]    |                                 ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 89 | macro_tuples_impl!{tuple_impls}
[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/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout]    = note: this warning originates in the macro `tuple_impls` which comes from the expansion of the macro `macro_tuples_impl` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] help: use `dyn`
[INFO] [stdout]    |
[INFO] [stdout] 65 |             type Iterator = Box<dyn Iterator<Item=Self::Item>>;
[INFO] [stdout]    |                                 +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/shrink.rs:65:33
[INFO] [stdout]    |
[INFO] [stdout] 65 |             type Iterator = Box<Iterator<Item=Self::Item>>;
[INFO] [stdout]    |                                 ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 89 | macro_tuples_impl!{tuple_impls}
[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/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout]    = note: this warning originates in the macro `tuple_impls` which comes from the expansion of the macro `macro_tuples_impl` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] help: use `dyn`
[INFO] [stdout]    |
[INFO] [stdout] 65 |             type Iterator = Box<dyn Iterator<Item=Self::Item>>;
[INFO] [stdout]    |                                 +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/shrink.rs:65:33
[INFO] [stdout]    |
[INFO] [stdout] 65 |             type Iterator = Box<Iterator<Item=Self::Item>>;
[INFO] [stdout]    |                                 ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 89 | macro_tuples_impl!{tuple_impls}
[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/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout]    = note: this warning originates in the macro `tuple_impls` which comes from the expansion of the macro `macro_tuples_impl` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] help: use `dyn`
[INFO] [stdout]    |
[INFO] [stdout] 65 |             type Iterator = Box<dyn Iterator<Item=Self::Item>>;
[INFO] [stdout]    |                                 +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/shrink.rs:65:33
[INFO] [stdout]    |
[INFO] [stdout] 65 |             type Iterator = Box<Iterator<Item=Self::Item>>;
[INFO] [stdout]    |                                 ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 89 | macro_tuples_impl!{tuple_impls}
[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/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout]    = note: this warning originates in the macro `tuple_impls` which comes from the expansion of the macro `macro_tuples_impl` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] help: use `dyn`
[INFO] [stdout]    |
[INFO] [stdout] 65 |             type Iterator = Box<dyn Iterator<Item=Self::Item>>;
[INFO] [stdout]    |                                 +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/shrink.rs:65:33
[INFO] [stdout]    |
[INFO] [stdout] 65 |             type Iterator = Box<Iterator<Item=Self::Item>>;
[INFO] [stdout]    |                                 ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 89 | macro_tuples_impl!{tuple_impls}
[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/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout]    = note: this warning originates in the macro `tuple_impls` which comes from the expansion of the macro `macro_tuples_impl` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] help: use `dyn`
[INFO] [stdout]    |
[INFO] [stdout] 65 |             type Iterator = Box<dyn Iterator<Item=Self::Item>>;
[INFO] [stdout]    |                                 +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/shrink.rs:65:33
[INFO] [stdout]    |
[INFO] [stdout] 65 |             type Iterator = Box<Iterator<Item=Self::Item>>;
[INFO] [stdout]    |                                 ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 89 | macro_tuples_impl!{tuple_impls}
[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/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout]    = note: this warning originates in the macro `tuple_impls` which comes from the expansion of the macro `macro_tuples_impl` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] help: use `dyn`
[INFO] [stdout]    |
[INFO] [stdout] 65 |             type Iterator = Box<dyn Iterator<Item=Self::Item>>;
[INFO] [stdout]    |                                 +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/shrink.rs:105:37
[INFO] [stdout]     |
[INFO] [stdout] 105 |                 type Iterator = Box<Iterator<Item=Self::Item>>;
[INFO] [stdout]     |                                     ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 132 | int_impls! { i8, i16, i32, i64, isize }
[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/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout]     = note: this warning originates in the macro `int_impls` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] help: use `dyn`
[INFO] [stdout]     |
[INFO] [stdout] 105 |                 type Iterator = Box<dyn Iterator<Item=Self::Item>>;
[INFO] [stdout]     |                                     +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/shrink.rs:148:37
[INFO] [stdout]     |
[INFO] [stdout] 148 |                 type Iterator = Box<Iterator<Item=Self::Item>>;
[INFO] [stdout]     |                                     ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 163 | uint_impls! { u8, u16, u32, u64, usize }
[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/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout]     = note: this warning originates in the macro `uint_impls` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] help: use `dyn`
[INFO] [stdout]     |
[INFO] [stdout] 148 |                 type Iterator = Box<dyn Iterator<Item=Self::Item>>;
[INFO] [stdout]     |                                     +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/shrink.rs:185:25
[INFO] [stdout]     |
[INFO] [stdout] 185 |     type Iterator = Box<Iterator<Item=Self::Item>>;
[INFO] [stdout]     |                         ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]     = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] help: use `dyn`
[INFO] [stdout]     |
[INFO] [stdout] 185 |     type Iterator = Box<dyn Iterator<Item=Self::Item>>;
[INFO] [stdout]     |                         +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/shrink.rs:274:25
[INFO] [stdout]     |
[INFO] [stdout] 274 |     type Iterator = Box<Iterator<Item=bool>>;
[INFO] [stdout]     |                         ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]     = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] help: use `dyn`
[INFO] [stdout]     |
[INFO] [stdout] 274 |     type Iterator = Box<dyn Iterator<Item=bool>>;
[INFO] [stdout]     |                         +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/rose.rs:78:28
[INFO] [stdout]    |
[INFO] [stdout] 78 |     where F: Fn(&T) -> Box<Iterator<Item=T>> + '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/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] help: use `dyn`
[INFO] [stdout]    |
[INFO] [stdout] 78 |     where F: Fn(&T) -> Box<dyn Iterator<Item=T>> + 'static
[INFO] [stdout]    |                            +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/rose.rs:89:28
[INFO] [stdout]    |
[INFO] [stdout] 89 |     where F: Fn(&T) -> Box<Iterator<Item=T>> + '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/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] help: use `dyn`
[INFO] [stdout]    |
[INFO] [stdout] 89 |     where F: Fn(&T) -> Box<dyn Iterator<Item=T>> + 'static
[INFO] [stdout]    |                            +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/rose.rs:109:32
[INFO] [stdout]     |
[INFO] [stdout] 109 |     where F: Fn(&S, &T) -> Box<Iterator<Item=T>> + '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/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] help: use `dyn`
[INFO] [stdout]     |
[INFO] [stdout] 109 |     where F: Fn(&S, &T) -> Box<dyn Iterator<Item=T>> + 'static
[INFO] [stdout]     |                                +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/rose.rs:121:32
[INFO] [stdout]     |
[INFO] [stdout] 121 |     where F: Fn(&S, &T) -> Box<Iterator<Item=T>> + '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/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] help: use `dyn`
[INFO] [stdout]     |
[INFO] [stdout] 121 |     where F: Fn(&S, &T) -> Box<dyn Iterator<Item=T>> + 'static
[INFO] [stdout]     |                                +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/rose.rs:33:31
[INFO] [stdout]    |
[INFO] [stdout] 33 |     fn iterator(&self) -> Box<Iterator<Item=Self>>;
[INFO] [stdout]    |                               ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] help: use `dyn`
[INFO] [stdout]    |
[INFO] [stdout] 33 |     fn iterator(&self) -> Box<dyn Iterator<Item=Self>>;
[INFO] [stdout]    |                               +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/rose.rs:93:31
[INFO] [stdout]    |
[INFO] [stdout] 93 |     fn iterator(&self) -> Box<Iterator<Item=Self>> {
[INFO] [stdout]    |                               ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] help: use `dyn`
[INFO] [stdout]    |
[INFO] [stdout] 93 |     fn iterator(&self) -> Box<dyn Iterator<Item=Self>> {
[INFO] [stdout]    |                               +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/rose.rs:125:31
[INFO] [stdout]     |
[INFO] [stdout] 125 |     fn iterator(&self) -> Box<Iterator<Item=Self>> {
[INFO] [stdout]     |                               ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]     = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] help: use `dyn`
[INFO] [stdout]     |
[INFO] [stdout] 125 |     fn iterator(&self) -> Box<dyn Iterator<Item=Self>> {
[INFO] [stdout]     |                               +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/shrink.rs:197:54
[INFO] [stdout]     |
[INFO] [stdout] 197 |                 .fold(Box::new(iter::empty()) as Box<Iterator<Item=C>>, |it, next| Box::new(it.chain(next)) )
[INFO] [stdout]     |                                                      ^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]     = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] help: use `dyn`
[INFO] [stdout]     |
[INFO] [stdout] 197 |                 .fold(Box::new(iter::empty()) as Box<dyn Iterator<Item=C>>, |it, next| Box::new(it.chain(next)) )
[INFO] [stdout]     |                                                      +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/shrink.rs:210:42
[INFO] [stdout]     |
[INFO] [stdout] 210 | ...                   ) as Box<Iterator<Item=C>>
[INFO] [stdout]     |                                ^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]     = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] help: use `dyn`
[INFO] [stdout]     |
[INFO] [stdout] 210 |                                 ) as Box<dyn Iterator<Item=C>>
[INFO] [stdout]     |                                          +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/shrink.rs:213:62
[INFO] [stdout]     |
[INFO] [stdout] 213 |                         .fold(Box::new(iter::empty()) as Box<Iterator<Item=C>>, |it, next| Box::new(it.chain(next)))
[INFO] [stdout]     |                                                              ^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]     = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] help: use `dyn`
[INFO] [stdout]     |
[INFO] [stdout] 213 |                         .fold(Box::new(iter::empty()) as Box<dyn Iterator<Item=C>>, |it, next| Box::new(it.chain(next)))
[INFO] [stdout]     |                                                              +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/shrink.rs:197:54
[INFO] [stdout]     |
[INFO] [stdout] 197 |                 .fold(Box::new(iter::empty()) as Box<Iterator<Item=C>>, |it, next| Box::new(it.chain(next)) )
[INFO] [stdout]     |                                                      ^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]     = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] help: use `dyn`
[INFO] [stdout]     |
[INFO] [stdout] 197 |                 .fold(Box::new(iter::empty()) as Box<dyn Iterator<Item=C>>, |it, next| Box::new(it.chain(next)) )
[INFO] [stdout]     |                                                      +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/shrink.rs:210:42
[INFO] [stdout]     |
[INFO] [stdout] 210 | ...                   ) as Box<Iterator<Item=C>>
[INFO] [stdout]     |                                ^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]     = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] help: use `dyn`
[INFO] [stdout]     |
[INFO] [stdout] 210 |                                 ) as Box<dyn Iterator<Item=C>>
[INFO] [stdout]     |                                          +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/shrink.rs:213:62
[INFO] [stdout]     |
[INFO] [stdout] 213 |                         .fold(Box::new(iter::empty()) as Box<Iterator<Item=C>>, |it, next| Box::new(it.chain(next)))
[INFO] [stdout]     |                                                              ^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]     = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] help: use `dyn`
[INFO] [stdout]     |
[INFO] [stdout] 213 |                         .fold(Box::new(iter::empty()) as Box<dyn Iterator<Item=C>>, |it, next| Box::new(it.chain(next)))
[INFO] [stdout]     |                                                              +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: lifetime may not live long enough
[INFO] [stdout]   --> src/generate.rs:22:9
[INFO] [stdout]    |
[INFO] [stdout] 13 | impl <'a, R: ?Sized + 'a> GenerateCtx<'a, R> {
[INFO] [stdout]    |       -- lifetime `'a` defined here
[INFO] [stdout] ...
[INFO] [stdout] 19 |     pub fn chop<'b>(&'b mut self) -> GenerateCtx<'b, R>
[INFO] [stdout]    |                 -- lifetime `'b` defined here
[INFO] [stdout] ...
[INFO] [stdout] 22 |         Self::new(self.rng, self.size/2)
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ argument requires that `'b` must outlive `'a`
[INFO] [stdout]    |
[INFO] [stdout]    = help: consider adding the following bound: `'b: 'a`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: lifetime may not live long enough
[INFO] [stdout]   --> src/generate.rs:22:9
[INFO] [stdout]    |
[INFO] [stdout] 13 | impl <'a, R: ?Sized + 'a> GenerateCtx<'a, R> {
[INFO] [stdout]    |       -- lifetime `'a` defined here
[INFO] [stdout] ...
[INFO] [stdout] 19 |     pub fn chop<'b>(&'b mut self) -> GenerateCtx<'b, R>
[INFO] [stdout]    |                 -- lifetime `'b` defined here
[INFO] [stdout] ...
[INFO] [stdout] 22 |         Self::new(self.rng, self.size/2)
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ argument requires that `'b` must outlive `'a`
[INFO] [stdout]    |
[INFO] [stdout]    = help: consider adding the following bound: `'b: 'a`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to previous error; 33 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `quickercheck` (lib test) due to 2 previous errors; 33 warnings emitted
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stdout] error: aborting due to previous error; 32 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `quickercheck` (lib) due to 2 previous errors; 32 warnings emitted
[INFO] running `Command { std: "docker" "inspect" "4e792d5ee5f7a2eb561a0aa92a6f020cb0e43cf857d9692fd18b5ce661c3b579", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "4e792d5ee5f7a2eb561a0aa92a6f020cb0e43cf857d9692fd18b5ce661c3b579", kill_on_drop: false }`
[INFO] [stdout] 4e792d5ee5f7a2eb561a0aa92a6f020cb0e43cf857d9692fd18b5ce661c3b579
