[INFO] fetching crate suppositions 0.1.4...
[INFO] testing suppositions-0.1.4 against beta-2022-04-10 for beta-1.61-1
[INFO] extracting crate suppositions 0.1.4 into /workspace/builds/worker-9/source
[INFO] validating manifest of crates.io crate suppositions 0.1.4 on toolchain beta-2022-04-10
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2022-04-10" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate suppositions 0.1.4
[INFO] finished tweaking crates.io crate suppositions 0.1.4
[INFO] tweaked toml for crates.io crate suppositions 0.1.4 written to /workspace/builds/worker-9/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2022-04-10" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2022-04-10" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/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:eaef2f80f755933c374d2ae5edccceec0c1312ceb8a4e0b6404e8ab76561e1e5" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2022-04-10" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] e24d61bc845adbf9702cd45707044cf3f47b236cbfcea2a32910ed9bd1ca17bc
[INFO] running `Command { std: "docker" "start" "-a" "e24d61bc845adbf9702cd45707044cf3f47b236cbfcea2a32910ed9bd1ca17bc", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "e24d61bc845adbf9702cd45707044cf3f47b236cbfcea2a32910ed9bd1ca17bc", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e24d61bc845adbf9702cd45707044cf3f47b236cbfcea2a32910ed9bd1ca17bc", kill_on_drop: false }`
[INFO] [stdout] e24d61bc845adbf9702cd45707044cf3f47b236cbfcea2a32910ed9bd1ca17bc
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:eaef2f80f755933c374d2ae5edccceec0c1312ceb8a4e0b6404e8ab76561e1e5" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2022-04-10" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 5e607cb3854261b53287f99e7bbf9ade35d89a74e7486cc8a283d15978982a55
[INFO] running `Command { std: "docker" "start" "-a" "5e607cb3854261b53287f99e7bbf9ade35d89a74e7486cc8a283d15978982a55", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling hex-slice v0.1.4
[INFO] [stderr]    Compiling suppositions v0.1.4 (/opt/rustwide/workdir)
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/generators.rs:187:27
[INFO] [stdout]     |
[INFO] [stdout] 187 | impl<T> Generator for Box<GeneratorObject<Item = T>> {
[INFO] [stdout]     |                           ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(bare_trait_objects)]` on by default
[INFO] [stdout]     = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]     = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] help: use `dyn`
[INFO] [stdout]     |
[INFO] [stdout] 187 - impl<T> Generator for Box<GeneratorObject<Item = T>> {
[INFO] [stdout] 187 + impl<T> Generator for Box<dyn GeneratorObject<Item = T>> {
[INFO] [stdout]     | 
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/generators.rs:157:38
[INFO] [stdout]     |
[INFO] [stdout] 157 |     fn generate_obj(&self, src: &mut Iterator<Item = u8>) -> Maybe<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] 157 -     fn generate_obj(&self, src: &mut Iterator<Item = u8>) -> Maybe<Self::Item>;
[INFO] [stdout] 157 +     fn generate_obj(&self, src: &mut dyn Iterator<Item = u8>) -> Maybe<Self::Item>;
[INFO] [stdout]     | 
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/generators.rs:167:27
[INFO] [stdout]     |
[INFO] [stdout] 167 |     fn boxed(self) -> Box<GeneratorObject<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] 167 -     fn boxed(self) -> Box<GeneratorObject<Item = Self::Item>>;
[INFO] [stdout] 167 +     fn boxed(self) -> Box<dyn GeneratorObject<Item = Self::Item>>;
[INFO] [stdout]     | 
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/generators.rs:175:27
[INFO] [stdout]     |
[INFO] [stdout] 175 |     fn boxed(self) -> Box<GeneratorObject<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] 175 -     fn boxed(self) -> Box<GeneratorObject<Item = Self::Item>> {
[INFO] [stdout] 175 +     fn boxed(self) -> Box<dyn GeneratorObject<Item = Self::Item>> {
[INFO] [stdout]     | 
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/generators.rs:182:42
[INFO] [stdout]     |
[INFO] [stdout] 182 |     fn generate_obj(&self, mut src: &mut Iterator<Item = u8>) -> Maybe<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] 182 -     fn generate_obj(&self, mut src: &mut Iterator<Item = u8>) -> Maybe<Self::Item> {
[INFO] [stdout] 182 +     fn generate_obj(&self, mut src: &mut dyn Iterator<Item = u8>) -> Maybe<Self::Item> {
[INFO] [stdout]     | 
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/generators.rs:190:43
[INFO] [stdout]     |
[INFO] [stdout] 190 |         (**self).generate_obj(src as &mut Iterator<Item = u8>)
[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] 190 -         (**self).generate_obj(src as &mut Iterator<Item = u8>)
[INFO] [stdout] 190 +         (**self).generate_obj(src as &mut dyn Iterator<Item = u8>)
[INFO] [stdout]     | 
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 6 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 2.48s
[INFO] running `Command { std: "docker" "inspect" "5e607cb3854261b53287f99e7bbf9ade35d89a74e7486cc8a283d15978982a55", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "5e607cb3854261b53287f99e7bbf9ade35d89a74e7486cc8a283d15978982a55", kill_on_drop: false }`
[INFO] [stdout] 5e607cb3854261b53287f99e7bbf9ade35d89a74e7486cc8a283d15978982a55
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:eaef2f80f755933c374d2ae5edccceec0c1312ceb8a4e0b6404e8ab76561e1e5" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2022-04-10" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] b16e04653ec262dd57cd3f22f6c073af2ef6daaf9f8decc366dbe3313c0f6ac0
[INFO] running `Command { std: "docker" "start" "-a" "b16e04653ec262dd57cd3f22f6c073af2ef6daaf9f8decc366dbe3313c0f6ac0", kill_on_drop: false }`
[INFO] [stderr]    Compiling regex v0.2.11
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/generators.rs:187:27
[INFO] [stdout]     |
[INFO] [stdout] 187 | impl<T> Generator for Box<GeneratorObject<Item = T>> {
[INFO] [stdout]     |                           ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(bare_trait_objects)]` on by default
[INFO] [stdout]     = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]     = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] help: use `dyn`
[INFO] [stdout]     |
[INFO] [stdout] 187 - impl<T> Generator for Box<GeneratorObject<Item = T>> {
[INFO] [stdout] 187 + impl<T> Generator for Box<dyn GeneratorObject<Item = T>> {
[INFO] [stdout]     | 
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/generators.rs:157:38
[INFO] [stdout]     |
[INFO] [stdout] 157 |     fn generate_obj(&self, src: &mut Iterator<Item = u8>) -> Maybe<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] 157 -     fn generate_obj(&self, src: &mut Iterator<Item = u8>) -> Maybe<Self::Item>;
[INFO] [stdout] 157 +     fn generate_obj(&self, src: &mut dyn Iterator<Item = u8>) -> Maybe<Self::Item>;
[INFO] [stdout]     | 
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/generators.rs:167:27
[INFO] [stdout]     |
[INFO] [stdout] 167 |     fn boxed(self) -> Box<GeneratorObject<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] 167 -     fn boxed(self) -> Box<GeneratorObject<Item = Self::Item>>;
[INFO] [stdout] 167 +     fn boxed(self) -> Box<dyn GeneratorObject<Item = Self::Item>>;
[INFO] [stdout]     | 
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/generators.rs:175:27
[INFO] [stdout]     |
[INFO] [stdout] 175 |     fn boxed(self) -> Box<GeneratorObject<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] 175 -     fn boxed(self) -> Box<GeneratorObject<Item = Self::Item>> {
[INFO] [stdout] 175 +     fn boxed(self) -> Box<dyn GeneratorObject<Item = Self::Item>> {
[INFO] [stdout]     | 
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/generators.rs:182:42
[INFO] [stdout]     |
[INFO] [stdout] 182 |     fn generate_obj(&self, mut src: &mut Iterator<Item = u8>) -> Maybe<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] 182 -     fn generate_obj(&self, mut src: &mut Iterator<Item = u8>) -> Maybe<Self::Item> {
[INFO] [stdout] 182 +     fn generate_obj(&self, mut src: &mut dyn Iterator<Item = u8>) -> Maybe<Self::Item> {
[INFO] [stdout]     | 
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/generators.rs:190:43
[INFO] [stdout]     |
[INFO] [stdout] 190 |         (**self).generate_obj(src as &mut Iterator<Item = u8>)
[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] 190 -         (**self).generate_obj(src as &mut Iterator<Item = u8>)
[INFO] [stdout] 190 +         (**self).generate_obj(src as &mut dyn Iterator<Item = u8>)
[INFO] [stdout]     | 
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 6 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]    Compiling env_logger v0.4.3
[INFO] [stderr]    Compiling suppositions v0.1.4 (/opt/rustwide/workdir)
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> tests/recursive.rs:36:22
[INFO] [stdout]    |
[INFO] [stdout] 36 | fn expr_gen() -> Box<GeneratorObject<Item=Expr>> {
[INFO] [stdout]    |                      ^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(bare_trait_objects)]` on by default
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] help: use `dyn`
[INFO] [stdout]    |
[INFO] [stdout] 36 - fn expr_gen() -> Box<GeneratorObject<Item=Expr>> {
[INFO] [stdout] 36 + fn expr_gen() -> Box<dyn GeneratorObject<Item=Expr>> {
[INFO] [stdout]    | 
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around function argument
[INFO] [stdout]   --> tests/smoketest.rs:57:14
[INFO] [stdout]    |
[INFO] [stdout] 57 |     property((booleans())).check(|_| false)
[INFO] [stdout]    |              ^          ^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_parens)]` on by default
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]    |
[INFO] [stdout] 57 -     property((booleans())).check(|_| false)
[INFO] [stdout] 57 +     property(booleans()).check(|_| false)
[INFO] [stdout]    | 
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around function argument
[INFO] [stdout]   --> tests/smoketest.rs:62:14
[INFO] [stdout]    |
[INFO] [stdout] 62 |     property((booleans())).check(|_| true)
[INFO] [stdout]    |              ^          ^
[INFO] [stdout]    |
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]    |
[INFO] [stdout] 62 -     property((booleans())).check(|_| true)
[INFO] [stdout] 62 +     property(booleans()).check(|_| true)
[INFO] [stdout]    | 
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around function argument
[INFO] [stdout]   --> tests/smoketest.rs:77:14
[INFO] [stdout]    |
[INFO] [stdout] 77 |     property((booleans())).check(|_| -> Result<(), ()> { Err(()) })
[INFO] [stdout]    |              ^          ^
[INFO] [stdout]    |
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]    |
[INFO] [stdout] 77 -     property((booleans())).check(|_| -> Result<(), ()> { Err(()) })
[INFO] [stdout] 77 +     property(booleans()).check(|_| -> Result<(), ()> { Err(()) })
[INFO] [stdout]    | 
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around function argument
[INFO] [stdout]   --> tests/smoketest.rs:83:14
[INFO] [stdout]    |
[INFO] [stdout] 83 |     property((booleans())).check(|_| -> Result<(), &'static str> { Err("horrible failure") })
[INFO] [stdout]    |              ^          ^
[INFO] [stdout]    |
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]    |
[INFO] [stdout] 83 -     property((booleans())).check(|_| -> Result<(), &'static str> { Err("horrible failure") })
[INFO] [stdout] 83 +     property(booleans()).check(|_| -> Result<(), &'static str> { Err("horrible failure") })
[INFO] [stdout]    | 
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around function argument
[INFO] [stdout]   --> tests/smoketest.rs:89:14
[INFO] [stdout]    |
[INFO] [stdout] 89 |     property((booleans())).check(|_| -> Result<(), ()> { Ok(()) })
[INFO] [stdout]    |              ^          ^
[INFO] [stdout]    |
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]    |
[INFO] [stdout] 89 -     property((booleans())).check(|_| -> Result<(), ()> { Ok(()) })
[INFO] [stdout] 89 +     property(booleans()).check(|_| -> Result<(), ()> { Ok(()) })
[INFO] [stdout]    | 
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around function argument
[INFO] [stdout]   --> tests/smoketest.rs:95:14
[INFO] [stdout]    |
[INFO] [stdout] 95 |     property((booleans())).check(|_| -> () { panic!("Big bad boom") })
[INFO] [stdout]    |              ^          ^
[INFO] [stdout]    |
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]    |
[INFO] [stdout] 95 -     property((booleans())).check(|_| -> () { panic!("Big bad boom") })
[INFO] [stdout] 95 +     property(booleans()).check(|_| -> () { panic!("Big bad boom") })
[INFO] [stdout]    | 
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around function argument
[INFO] [stdout]    --> tests/smoketest.rs:101:14
[INFO] [stdout]     |
[INFO] [stdout] 101 |     property((booleans())).check(|_| -> () { panic!("Big bad boom") })
[INFO] [stdout]     |              ^          ^
[INFO] [stdout]     |
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]     |
[INFO] [stdout] 101 -     property((booleans())).check(|_| -> () { panic!("Big bad boom") })
[INFO] [stdout] 101 +     property(booleans()).check(|_| -> () { panic!("Big bad boom") })
[INFO] [stdout]     | 
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> examples/die-hard.rs:70:17
[INFO] [stdout]    |
[INFO] [stdout] 70 | fn ops() -> Box<GeneratorObject<Item = Op>> {
[INFO] [stdout]    |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(bare_trait_objects)]` on by default
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] help: use `dyn`
[INFO] [stdout]    |
[INFO] [stdout] 70 - fn ops() -> Box<GeneratorObject<Item = Op>> {
[INFO] [stdout] 70 + fn ops() -> Box<dyn GeneratorObject<Item = Op>> {
[INFO] [stdout]    | 
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/generators.rs:187:27
[INFO] [stdout]     |
[INFO] [stdout] 187 | impl<T> Generator for Box<GeneratorObject<Item = T>> {
[INFO] [stdout]     |                           ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(bare_trait_objects)]` on by default
[INFO] [stdout]     = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]     = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] help: use `dyn`
[INFO] [stdout]     |
[INFO] [stdout] 187 - impl<T> Generator for Box<GeneratorObject<Item = T>> {
[INFO] [stdout] 187 + impl<T> Generator for Box<dyn GeneratorObject<Item = T>> {
[INFO] [stdout]     | 
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/generators.rs:157:38
[INFO] [stdout]     |
[INFO] [stdout] 157 |     fn generate_obj(&self, src: &mut Iterator<Item = u8>) -> Maybe<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] 157 -     fn generate_obj(&self, src: &mut Iterator<Item = u8>) -> Maybe<Self::Item>;
[INFO] [stdout] 157 +     fn generate_obj(&self, src: &mut dyn Iterator<Item = u8>) -> Maybe<Self::Item>;
[INFO] [stdout]     | 
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/generators.rs:167:27
[INFO] [stdout]     |
[INFO] [stdout] 167 |     fn boxed(self) -> Box<GeneratorObject<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] 167 -     fn boxed(self) -> Box<GeneratorObject<Item = Self::Item>>;
[INFO] [stdout] 167 +     fn boxed(self) -> Box<dyn GeneratorObject<Item = Self::Item>>;
[INFO] [stdout]     | 
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/generators.rs:175:27
[INFO] [stdout]     |
[INFO] [stdout] 175 |     fn boxed(self) -> Box<GeneratorObject<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] 175 -     fn boxed(self) -> Box<GeneratorObject<Item = Self::Item>> {
[INFO] [stdout] 175 +     fn boxed(self) -> Box<dyn GeneratorObject<Item = Self::Item>> {
[INFO] [stdout]     | 
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/generators.rs:182:42
[INFO] [stdout]     |
[INFO] [stdout] 182 |     fn generate_obj(&self, mut src: &mut Iterator<Item = u8>) -> Maybe<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] 182 -     fn generate_obj(&self, mut src: &mut Iterator<Item = u8>) -> Maybe<Self::Item> {
[INFO] [stdout] 182 +     fn generate_obj(&self, mut src: &mut dyn Iterator<Item = u8>) -> Maybe<Self::Item> {
[INFO] [stdout]     | 
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/generators.rs:190:43
[INFO] [stdout]     |
[INFO] [stdout] 190 |         (**self).generate_obj(src as &mut Iterator<Item = u8>)
[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] 190 -         (**self).generate_obj(src as &mut Iterator<Item = u8>)
[INFO] [stdout] 190 +         (**self).generate_obj(src as &mut dyn Iterator<Item = u8>)
[INFO] [stdout]     | 
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/data.rs:321:17
[INFO] [stdout]     |
[INFO] [stdout] 321 |         let _: &Iterator<Item = u8> = &p.replay();
[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] 321 -         let _: &Iterator<Item = u8> = &p.replay();
[INFO] [stdout] 321 +         let _: &dyn Iterator<Item = u8> = &p.replay();
[INFO] [stdout]     | 
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/data.rs:330:17
[INFO] [stdout]     |
[INFO] [stdout] 330 |         let _: &Iterator<Item = u8> = &p.replay();
[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] 330 -         let _: &Iterator<Item = u8> = &p.replay();
[INFO] [stdout] 330 +         let _: &dyn Iterator<Item = u8> = &p.replay();
[INFO] [stdout]     | 
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 7 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 8 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 18.21s
[INFO] [stderr]   Executable unittests src/lib.rs (/opt/rustwide/target/debug/deps/suppositions-bd1f1704a1c43a96)
[INFO] [stderr]   Executable tests/generators.rs (/opt/rustwide/target/debug/deps/generators-d757a975c391a178)
[INFO] [stderr]   Executable tests/recursive.rs (/opt/rustwide/target/debug/deps/recursive-961265374af18734)
[INFO] [stderr]   Executable tests/smoketest.rs (/opt/rustwide/target/debug/deps/smoketest-20ce04980f9c068f)
[INFO] running `Command { std: "docker" "inspect" "b16e04653ec262dd57cd3f22f6c073af2ef6daaf9f8decc366dbe3313c0f6ac0", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b16e04653ec262dd57cd3f22f6c073af2ef6daaf9f8decc366dbe3313c0f6ac0", kill_on_drop: false }`
[INFO] [stdout] b16e04653ec262dd57cd3f22f6c073af2ef6daaf9f8decc366dbe3313c0f6ac0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:eaef2f80f755933c374d2ae5edccceec0c1312ceb8a4e0b6404e8ab76561e1e5" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2022-04-10" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] 17bfc1281b400ce5dc70da763db893224bc551bfd6966c494235db8d971e2e78
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "17bfc1281b400ce5dc70da763db893224bc551bfd6966c494235db8d971e2e78", kill_on_drop: false }`
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/generators.rs:187:27
[INFO] [stderr]     |
[INFO] [stderr] 187 | impl<T> Generator for Box<GeneratorObject<Item = T>> {
[INFO] [stderr]     |                           ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(bare_trait_objects)]` on by default
[INFO] [stderr]     = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stderr]     = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stderr] help: use `dyn`
[INFO] [stderr]     |
[INFO] [stderr] 187 - impl<T> Generator for Box<GeneratorObject<Item = T>> {
[INFO] [stderr] 187 + impl<T> Generator for Box<dyn GeneratorObject<Item = T>> {
[INFO] [stderr]     | 
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/generators.rs:157:38
[INFO] [stderr]     |
[INFO] [stderr] 157 |     fn generate_obj(&self, src: &mut Iterator<Item = u8>) -> Maybe<Self::Item>;
[INFO] [stderr]     |                                      ^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stderr]     = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stderr] help: use `dyn`
[INFO] [stderr]     |
[INFO] [stderr] 157 -     fn generate_obj(&self, src: &mut Iterator<Item = u8>) -> Maybe<Self::Item>;
[INFO] [stderr] 157 +     fn generate_obj(&self, src: &mut dyn Iterator<Item = u8>) -> Maybe<Self::Item>;
[INFO] [stderr]     | 
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/generators.rs:167:27
[INFO] [stderr]     |
[INFO] [stderr] 167 |     fn boxed(self) -> Box<GeneratorObject<Item = Self::Item>>;
[INFO] [stderr]     |                           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stderr]     = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stderr] help: use `dyn`
[INFO] [stderr]     |
[INFO] [stderr] 167 -     fn boxed(self) -> Box<GeneratorObject<Item = Self::Item>>;
[INFO] [stderr] 167 +     fn boxed(self) -> Box<dyn GeneratorObject<Item = Self::Item>>;
[INFO] [stderr]     | 
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/generators.rs:175:27
[INFO] [stderr]     |
[INFO] [stderr] 175 |     fn boxed(self) -> Box<GeneratorObject<Item = Self::Item>> {
[INFO] [stderr]     |                           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stderr]     = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stderr] help: use `dyn`
[INFO] [stderr]     |
[INFO] [stderr] 175 -     fn boxed(self) -> Box<GeneratorObject<Item = Self::Item>> {
[INFO] [stderr] 175 +     fn boxed(self) -> Box<dyn GeneratorObject<Item = Self::Item>> {
[INFO] [stderr]     | 
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/generators.rs:182:42
[INFO] [stderr]     |
[INFO] [stderr] 182 |     fn generate_obj(&self, mut src: &mut Iterator<Item = u8>) -> Maybe<Self::Item> {
[INFO] [stderr]     |                                          ^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stderr]     = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stderr] help: use `dyn`
[INFO] [stderr]     |
[INFO] [stderr] 182 -     fn generate_obj(&self, mut src: &mut Iterator<Item = u8>) -> Maybe<Self::Item> {
[INFO] [stderr] 182 +     fn generate_obj(&self, mut src: &mut dyn Iterator<Item = u8>) -> Maybe<Self::Item> {
[INFO] [stderr]     | 
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/generators.rs:190:43
[INFO] [stderr]     |
[INFO] [stderr] 190 |         (**self).generate_obj(src as &mut Iterator<Item = u8>)
[INFO] [stderr]     |                                           ^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stderr]     = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stderr] help: use `dyn`
[INFO] [stderr]     |
[INFO] [stderr] 190 -         (**self).generate_obj(src as &mut Iterator<Item = u8>)
[INFO] [stderr] 190 +         (**self).generate_obj(src as &mut dyn Iterator<Item = u8>)
[INFO] [stderr]     | 
[INFO] [stderr] 
[INFO] [stderr] warning: `suppositions` (lib) generated 6 warnings
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> examples/die-hard.rs:70:17
[INFO] [stderr]    |
[INFO] [stderr] 70 | fn ops() -> Box<GeneratorObject<Item = Op>> {
[INFO] [stderr]    |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(bare_trait_objects)]` on by default
[INFO] [stderr]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stderr]    = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stderr] help: use `dyn`
[INFO] [stderr]    |
[INFO] [stderr] 70 - fn ops() -> Box<GeneratorObject<Item = Op>> {
[INFO] [stderr] 70 + fn ops() -> Box<dyn GeneratorObject<Item = Op>> {
[INFO] [stderr]    | 
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/data.rs:321:17
[INFO] [stderr]     |
[INFO] [stderr] 321 |         let _: &Iterator<Item = u8> = &p.replay();
[INFO] [stderr]     |                 ^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stderr]     = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stderr] help: use `dyn`
[INFO] [stderr]     |
[INFO] [stderr] 321 -         let _: &Iterator<Item = u8> = &p.replay();
[INFO] [stderr] 321 +         let _: &dyn Iterator<Item = u8> = &p.replay();
[INFO] [stderr]     | 
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/data.rs:330:17
[INFO] [stderr]     |
[INFO] [stderr] 330 |         let _: &Iterator<Item = u8> = &p.replay();
[INFO] [stderr]     |                 ^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stderr]     = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stderr] help: use `dyn`
[INFO] [stderr]     |
[INFO] [stderr] 330 -         let _: &Iterator<Item = u8> = &p.replay();
[INFO] [stderr] 330 +         let _: &dyn Iterator<Item = u8> = &p.replay();
[INFO] [stderr]     | 
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around function argument
[INFO] [stderr]   --> tests/smoketest.rs:57:14
[INFO] [stderr]    |
[INFO] [stderr] 57 |     property((booleans())).check(|_| false)
[INFO] [stderr]    |              ^          ^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_parens)]` on by default
[INFO] [stderr] help: remove these parentheses
[INFO] [stderr]    |
[INFO] [stderr] 57 -     property((booleans())).check(|_| false)
[INFO] [stderr] 57 +     property(booleans()).check(|_| false)
[INFO] [stderr]    | 
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around function argument
[INFO] [stderr]   --> tests/smoketest.rs:62:14
[INFO] [stdout] 
[INFO] [stderr]    |
[INFO] [stdout] running 61 tests
[INFO] [stderr] 62 |     property((booleans())).check(|_| true)
[INFO] [stdout] test data::tests::minimiser_should_minimise_scalar_values ... ok
[INFO] [stderr]    |              ^          ^
[INFO] [stdout] test data::tests::minimiser_should_minimise_to_minimum_given_size ... ok
[INFO] [stderr]    |
[INFO] [stdout] test data::tests::replay_can_act_as_iterator ... ok
[INFO] [stderr] help: remove these parentheses
[INFO] [stdout] test data::tests::should_allow_borrowing_buffer ... ok
[INFO] [stderr]    |
[INFO] [stdout] test generators::tests::bools_minimize_to_false ... ok
[INFO] [stderr] 62 -     property((booleans())).check(|_| true)
[INFO] [stdout] test generators::tests::bools_should_generate_false_booleans_from_zeros ... ok
[INFO] [stderr] 62 +     property(booleans()).check(|_| true)
[INFO] [stdout] test generators::tests::bools_should_generate_true_booleans_from_saturated_values ... ok
[INFO] [stderr]    | 
[INFO] [stdout] test generators::tests::biased_coin ... ok
[INFO] [stderr] 
[INFO] [stdout] test data::tests::minimiser_should_minimise_scalar_values_accounting_for_overflow ... ok
[INFO] [stderr] warning: unnecessary parentheses around function argument
[INFO] [stderr]   --> tests/smoketest.rs:77:14
[INFO] [stderr]    |
[INFO] [stderr] 77 |     property((booleans())).check(|_| -> Result<(), ()> { Err(()) })
[INFO] [stderr]    |              ^          ^
[INFO] [stderr]    |
[INFO] [stderr] help: remove these parentheses
[INFO] [stderr]    |
[INFO] [stderr] 77 -     property((booleans())).check(|_| -> Result<(), ()> { Err(()) })
[INFO] [stderr] 77 +     property(booleans()).check(|_| -> Result<(), ()> { Err(()) })
[INFO] [stderr]    | 
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around function argument
[INFO] [stderr]   --> tests/smoketest.rs:83:14
[INFO] [stderr]    |
[INFO] [stderr] 83 |     property((booleans())).check(|_| -> Result<(), &'static str> { Err("horrible failure") })
[INFO] [stderr]    |              ^          ^
[INFO] [stderr]    |
[INFO] [stderr] help: remove these parentheses
[INFO] [stderr]    |
[INFO] [stderr] 83 -     property((booleans())).check(|_| -> Result<(), &'static str> { Err("horrible failure") })
[INFO] [stderr] 83 +     property(booleans()).check(|_| -> Result<(), &'static str> { Err("horrible failure") })
[INFO] [stderr]    | 
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around function argument
[INFO] [stderr]   --> tests/smoketest.rs:89:14
[INFO] [stderr]    |
[INFO] [stderr] 89 |     property((booleans())).check(|_| -> Result<(), ()> { Ok(()) })
[INFO] [stderr]    |              ^          ^
[INFO] [stderr]    |
[INFO] [stderr] help: remove these parentheses
[INFO] [stderr]    |
[INFO] [stderr] 89 -     property((booleans())).check(|_| -> Result<(), ()> { Ok(()) })
[INFO] [stderr] 89 +     property(booleans()).check(|_| -> Result<(), ()> { Ok(()) })
[INFO] [stderr]    | 
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around function argument
[INFO] [stderr]   --> tests/smoketest.rs:95:14
[INFO] [stderr]    |
[INFO] [stderr] 95 |     property((booleans())).check(|_| -> () { panic!("Big bad boom") })
[INFO] [stderr]    |              ^          ^
[INFO] [stderr]    |
[INFO] [stderr] help: remove these parentheses
[INFO] [stderr]    |
[INFO] [stderr] 95 -     property((booleans())).check(|_| -> () { panic!("Big bad boom") })
[INFO] [stderr] 95 +     property(booleans()).check(|_| -> () { panic!("Big bad boom") })
[INFO] [stderr]    | 
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around function argument
[INFO] [stderr]    --> tests/smoketest.rs:101:14
[INFO] [stderr]     |
[INFO] [stderr] 101 |     property((booleans())).check(|_| -> () { panic!("Big bad boom") })
[INFO] [stderr]     |              ^          ^
[INFO] [stderr]     |
[INFO] [stderr] help: remove these parentheses
[INFO] [stderr]     |
[INFO] [stderr] 101 -     property((booleans())).check(|_| -> () { panic!("Big bad boom") })
[INFO] [stderr] 101 +     property(booleans()).check(|_| -> () { panic!("Big bad boom") })
[INFO] [stderr]     | 
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> tests/recursive.rs:36:22
[INFO] [stderr]    |
[INFO] [stderr] 36 | fn expr_gen() -> Box<GeneratorObject<Item=Expr>> {
[INFO] [stderr]    |                      ^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(bare_trait_objects)]` on by default
[INFO] [stderr]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stderr]    = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stderr] help: use `dyn`
[INFO] [stderr]    |
[INFO] [stderr] 36 - fn expr_gen() -> Box<GeneratorObject<Item=Expr>> {
[INFO] [stderr] 36 + fn expr_gen() -> Box<dyn GeneratorObject<Item=Expr>> {
[INFO] [stderr]    | 
[INFO] [stderr] 
[INFO] [stderr] warning: `suppositions` (example "die-hard") generated 1 warning
[INFO] [stderr] warning: `suppositions` (lib test) generated 8 warnings (6 duplicates)
[INFO] [stderr] warning: `suppositions` (test "smoketest") generated 7 warnings
[INFO] [stderr] warning: `suppositions` (test "recursive") generated 1 warning
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.07s
[INFO] [stderr]      Running unittests src/lib.rs (/opt/rustwide/target/debug/deps/suppositions-bd1f1704a1c43a96)
[INFO] [stdout] test data::tests::minimiser_should_minimise_scalar_values_by_search ... ok
[INFO] [stdout] test data::tests::should_take_each_item_in_pool ... ok
[INFO] [stdout] test data::tests::tap_can_act_as_iterator ... ok
[INFO] [stdout] test data::tests::minimiser_should_minimise_to_empty ... ok
[INFO] [stdout] test data::tests::should_generate_random_data ... ok
[INFO] [stdout] test generators::tests::filter_should_pass_through_when_true ... ok
[INFO] [stdout] test generators::tests::filter_map_should_skip_when_err ... ok
[INFO] [stdout] test generators::tests::i64s_minimize_to_zero ... ok
[INFO] [stdout] test generators::tests::filter_map_should_pass_through_when_ok ... ok
[INFO] [stdout] test data::tests::minimiser_should_minimise_scalar_values_to_empty ... ok
[INFO] [stdout] test generators::tests::filter_should_skip_when_false ... ok
[INFO] [stdout] test data::tests::should_allow_restarting_read ... ok
[INFO] [stdout] test generators::tests::consts_should_generate_same_values ... ok
[INFO] [stdout] test generators::tests::collections_u64s_minimize_to_empty ... ok
[INFO] [stdout] test generators::tests::info_pools_minimize_to_empty ... ok
[INFO] [stdout] test generators::tests::result_u8_u64s_minimize_to_ok ... ok
[INFO] [stdout] test generators::tests::optional_u64s_minimize_to_none ... ok
[INFO] [stdout] test generators::tests::tuple_u8s_u8s_minimize_to_zero ... ok
[INFO] [stdout] test generators::tests::info_pools_should_generate_same_output_given_same_input ... ok
[INFO] [stdout] test generators::tests::i64s_should_generate_same_output_given_same_input ... ok
[INFO] [stdout] test generators::tests::u64s_minimize_to_zero ... ok
[INFO] [stdout] test generators::tests::bools_should_generate_same_output_given_same_input ... ok
[INFO] [stdout] test generators::tests::tuple_u8s_u8s_should_generate_same_output_given_same_input ... ok
[INFO] [stdout] test generators::tests::info_pools_usually_generates_different_output_for_different_inputs ... ok
[INFO] [stdout] test generators::tests::bools_usually_generates_different_output_for_different_inputs ... ok
[INFO] [stdout] test generators::tests::collection_lengths::mean_length_can_be_set_as_3 ... ok
[INFO] [stdout] test generators::tests::one_of_should_pick_choices_relativey_evenly ... ok
[INFO] [stdout] test generators::tests::u8s_minimize_to_zero ... ok
[INFO] [stdout] test generators::tests::collection_lengths::mean_length_can_be_set_as_5 ... ok
[INFO] [stdout] test generators::tests::u64s_should_generate_same_output_given_same_input ... ok
[INFO] [stdout] test generators::tests::vec_bools_minimize_to_empty ... ok
[INFO] [stdout] test generators::tests::vec_bools_can_minimise_with_predicate ... ok
[INFO] [stdout] test generators::tests::u8s_should_generate_same_output_given_same_input ... ok
[INFO] [stdout] test generators::tests::collection_lengths::mean_length_can_be_set_as_23 ... ok
[INFO] [stdout] test generators::tests::collection_lengths::mean_length_can_be_set_as_7 ... ok
[INFO] [stdout] test generators::tests::i64s_usually_generates_different_output_for_different_inputs ... ok
[INFO] [stdout] test generators::tests::tuple_u8s_u8s_usually_generates_different_output_for_different_inputs ... ok
[INFO] [stdout] test generators::tests::vecs_should_generate_same_output_given_same_input ... ok
[INFO] [stdout] test generators::tests::collection_lengths::mean_length_can_be_set_as_10 ... ok
[INFO] [stdout] test generators::tests::u64s_usually_generates_different_output_for_different_inputs ... ok
[INFO] [stdout] test generators::tests::u8s_usually_generates_different_output_for_different_inputs ... ok
[INFO] [stdout] test generators::tests::tuple_u8s_u8s_should_partially_order_same_as_source ... ok
[INFO] [stdout] test generators::tests::bools_should_partially_order_same_as_source ... ok
[INFO] [stdout] test generators::tests::vector_lengths::mean_length_can_be_set_as_10 ... ok
[INFO] [stdout] test generators::tests::vecs_usually_generates_different_output_for_different_inputs ... ok
[INFO] [stdout] test generators::tests::vector_lengths::mean_length_can_be_set_as_3 ... ok
[INFO] [stdout] test generators::tests::vector_lengths::mean_length_can_be_set_as_5 ... ok
[INFO] [stdout] test generators::tests::vector_lengths::mean_length_can_be_set_as_23 ... ok
[INFO] [stdout] test generators::tests::vector_lengths::mean_length_can_be_set_as_7 ... ok
[INFO] [stdout] test generators::tests::i64s_should_partially_order_same_as_source ... ok
[INFO] [stdout] test generators::tests::u8s_should_partially_order_same_as_source ... ok
[INFO] [stdout] test generators::tests::u64s_should_partially_order_same_as_source ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 61 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.58s
[INFO] [stdout] 
[INFO] [stderr]      Running tests/generators.rs (/opt/rustwide/target/debug/deps/generators-d757a975c391a178)
[INFO] [stdout] 
[INFO] [stdout] running 16 tests
[INFO] [stdout] test boxed_generator_yields_same_as_inner_value ... ok
[INFO] [stdout] test f64s_should_generate_same_output_given_same_input ... ok
[INFO] [stdout] test generator_of_3_tuple ... ok
[INFO] [stdout] test generator_of_2_tuple ... ok
[INFO] [stdout] test weighted_coin_should_partially_order_same_as_source ... ok
[INFO] [stdout] test i64s_should_partially_order_same_as_source ... ok
[INFO] [stdout] test uniform_f64s_should_partially_order_same_as_source ... ok
[INFO] [stdout] test uniform_f64s_should_generate_values_between_0_and_1 ... ok
[INFO] [stdout] test weighted_coin_should_generate_same_output_given_same_input ... ok
[INFO] [stdout] test f64s_should_partially_order_same_as_source ... ok
[INFO] [stdout] test lazy_generator_yields_same_as_inner_value ... ok
[INFO] [stdout] test uniform_f64s_should_generate_same_output_given_same_input ... ok
[INFO] [stdout] test one_of_should_pick_a_single_sample ... ok
[INFO] [stdout] test one_of_should_partially_order_same_as_source ... ok
[INFO] [stdout] test generator_map_should_trivially_preserve_invariants ... ok
[INFO] [stdout] test i64s_should_generate_same_output_given_same_input ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 16 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.02s
[INFO] [stdout] 
[INFO] [stderr]      Running tests/recursive.rs (/opt/rustwide/target/debug/deps/recursive-961265374af18734)
[INFO] [stdout] 
[INFO] [stdout] running 1 test
[INFO] [stderr]      Running tests/smoketest.rs (/opt/rustwide/target/debug/deps/smoketest-20ce04980f9c068f)
[INFO] [stdout] test add_adds ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 1 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.01s
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] running 11 tests
[INFO] [stdout] test trivial_pass ... ok
[INFO] [stdout] test trivial_result_pass ... ok
[INFO] [stdout] test some_approximation_of_usage ... ok
[INFO] [stdout] test trivial_result_failure - should panic ... ok
[INFO] [stdout] test value_dependent - should panic ... ok
[INFO] [stdout] test panic_includes_failure_message - should panic ... ok
[INFO] [stdout] test trivial_failure - should panic ... ok
[INFO] [stdout] test mersenne_conjecture - should panic ... ok
[INFO] [stderr]    Doc-tests suppositions
[INFO] [stdout] test some_approximation_of_failing_example - should panic ... ok
[INFO] [stdout] test trivial_result_includes_failing_result - should panic ... ok
[INFO] [stdout] test trivial_panic_failure - should panic ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 11 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.09s
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] running 3 tests
[INFO] [stdout] test src/generators.rs - generators::one_of (line 618) ... ok
[INFO] [stdout] test src/lib.rs - (line 25) ... ok
[INFO] [stdout] test src/generators.rs - generators::collections (line 246) ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 3 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 1.23s
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "17bfc1281b400ce5dc70da763db893224bc551bfd6966c494235db8d971e2e78", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "17bfc1281b400ce5dc70da763db893224bc551bfd6966c494235db8d971e2e78", kill_on_drop: false }`
[INFO] [stdout] 17bfc1281b400ce5dc70da763db893224bc551bfd6966c494235db8d971e2e78