[INFO] fetching crate morphism 0.4.1...
[INFO] checking morphism-0.4.1 against master#5518eaa946291f00471af8b254b2a1715f234882 for pr-120393
[INFO] extracting crate morphism 0.4.1 into /workspace/builds/worker-7-tc1/source
[INFO] validating manifest of crates.io crate morphism 0.4.1 on toolchain 5518eaa946291f00471af8b254b2a1715f234882
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+5518eaa946291f00471af8b254b2a1715f234882" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate morphism 0.4.1
[INFO] finished tweaking crates.io crate morphism 0.4.1
[INFO] tweaked toml for crates.io crate morphism 0.4.1 written to /workspace/builds/worker-7-tc1/source/Cargo.toml
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+5518eaa946291f00471af8b254b2a1715f234882" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+5518eaa946291f00471af8b254b2a1715f234882" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+5518eaa946291f00471af8b254b2a1715f234882" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] fd103a3fae0e7f78f42e5ef366a93ce02b92696fd18097086643af020eefd522
[INFO] running `Command { std: "docker" "start" "-a" "fd103a3fae0e7f78f42e5ef366a93ce02b92696fd18097086643af020eefd522", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "fd103a3fae0e7f78f42e5ef366a93ce02b92696fd18097086643af020eefd522", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "fd103a3fae0e7f78f42e5ef366a93ce02b92696fd18097086643af020eefd522", kill_on_drop: false }`
[INFO] [stdout] fd103a3fae0e7f78f42e5ef366a93ce02b92696fd18097086643af020eefd522
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+5518eaa946291f00471af8b254b2a1715f234882" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 9415bb1f2940508d9ec33dd85969f915e29a75f82c47c3c54556e4fe99419983
[INFO] running `Command { std: "docker" "start" "-a" "9415bb1f2940508d9ec33dd85969f915e29a75f82c47c3c54556e4fe99419983", kill_on_drop: false }`
[INFO] [stderr]     Checking morphism v0.4.1 (/opt/rustwide/workdir)
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/lib.rs:33:35
[INFO] [stdout]    |
[INFO] [stdout] 33 |     mfns: LinkedList<VecDeque<Box<Fn(*const ()) -> *const () + 'a>>>,
[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] 33 |     mfns: LinkedList<VecDeque<Box<dyn Fn(*const ()) -> *const () + 'a>>>,
[INFO] [stdout]    |                                   +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/lib.rs:33:35
[INFO] [stdout]    |
[INFO] [stdout] 33 |     mfns: LinkedList<VecDeque<Box<Fn(*const ()) -> *const () + 'a>>>,
[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] 33 |     mfns: LinkedList<VecDeque<Box<dyn Fn(*const ()) -> *const () + 'a>>>,
[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: unused closure that must be used
[INFO] [stdout]   --> benches/bench.rs:11:9
[INFO] [stdout]    |
[INFO] [stdout] 11 |         (|| {});
[INFO] [stdout]    |         ^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: closures are lazy and do nothing unless called
[INFO] [stdout]    = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused boxed closure that must be used
[INFO] [stdout]   --> benches/bench.rs:18:9
[INFO] [stdout]    |
[INFO] [stdout] 18 |         (Box::new(|| {}));
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: closures are lazy and do nothing unless called
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused return value of `Box::<T>::new` that must be used
[INFO] [stdout]   --> benches/bench.rs:18:9
[INFO] [stdout]    |
[INFO] [stdout] 18 |         (Box::new(|| {}));
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]    |
[INFO] [stdout] 18 |         let _ = (Box::new(|| {}));
[INFO] [stdout]    |         +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: type `morphism::Void` is private
[INFO] [stdout]   --> benches/bench.rs:25:9
[INFO] [stdout]    |
[INFO] [stdout] 25 |         Morphism::new::<()>();
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^^^ private type
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: type `morphism::Void` is private
[INFO] [stdout]   --> benches/bench.rs:31:18
[INFO] [stdout]    |
[INFO] [stdout] 31 |     let f = &mut Morphism::new::<()>();
[INFO] [stdout]    |                  ^^^^^^^^^^^^^^^^^^^ private type
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: type `morphism::Void` is private
[INFO] [stdout]   --> benches/bench.rs:39:18
[INFO] [stdout]    |
[INFO] [stdout] 39 |     let f = &mut Morphism::new::<()>();
[INFO] [stdout]    |                  ^^^^^^^^^^^^^^^^^^^ private type
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: type `morphism::Void` is private
[INFO] [stdout]   --> benches/bench.rs:49:18
[INFO] [stdout]    |
[INFO] [stdout] 49 |     let f = &mut Morphism::new::<()>();
[INFO] [stdout]    |                  ^^^^^^^^^^^^^^^^^^^ private type
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: type `morphism::Void` is private
[INFO] [stdout]   --> benches/bench.rs:59:18
[INFO] [stdout]    |
[INFO] [stdout] 59 |     let f = &mut Morphism::new::<()>();
[INFO] [stdout]    |                  ^^^^^^^^^^^^^^^^^^^ private type
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: type `morphism::Void` is private
[INFO] [stdout]   --> benches/bench.rs:69:18
[INFO] [stdout]    |
[INFO] [stdout] 69 |     let f = &mut Morphism::new::<()>();
[INFO] [stdout]    |                  ^^^^^^^^^^^^^^^^^^^ private type
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: type `morphism::Void` is private
[INFO] [stdout]   --> benches/bench.rs:77:18
[INFO] [stdout]    |
[INFO] [stdout] 77 |     let f = &mut Morphism::new::<()>();
[INFO] [stdout]    |                  ^^^^^^^^^^^^^^^^^^^ private type
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: type `morphism::Void` is private
[INFO] [stdout]   --> benches/bench.rs:87:18
[INFO] [stdout]    |
[INFO] [stdout] 87 |     let f = &mut Morphism::new::<()>();
[INFO] [stdout]    |                  ^^^^^^^^^^^^^^^^^^^ private type
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: type `morphism::Void` is private
[INFO] [stdout]   --> benches/bench.rs:97:18
[INFO] [stdout]    |
[INFO] [stdout] 97 |     let f = &mut Morphism::new::<()>();
[INFO] [stdout]    |                  ^^^^^^^^^^^^^^^^^^^ private type
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: type `morphism::Void` is private
[INFO] [stdout]    --> benches/bench.rs:123:13
[INFO] [stdout]     |
[INFO] [stdout] 123 |     let f = Morphism::new::<()>().tail(|_| {});
[INFO] [stdout]     |             ^^^^^^^^^^^^^^^^^^^ private type
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: type `morphism::Void` is private
[INFO] [stdout]    --> benches/bench.rs:131:17
[INFO] [stdout]     |
[INFO] [stdout] 131 |     let mut f = Morphism::new::<()>();
[INFO] [stdout]     |                 ^^^^^^^^^^^^^^^^^^^ private type
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: type `morphism::Void` is private
[INFO] [stdout]    --> benches/bench.rs:142:17
[INFO] [stdout]     |
[INFO] [stdout] 142 |     let mut f = Morphism::new::<()>();
[INFO] [stdout]     |                 ^^^^^^^^^^^^^^^^^^^ private type
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: type `morphism::Void` is private
[INFO] [stdout]    --> benches/bench.rs:153:17
[INFO] [stdout]     |
[INFO] [stdout] 153 |     let mut f = Morphism::new::<()>();
[INFO] [stdout]     |                 ^^^^^^^^^^^^^^^^^^^ private type
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 13 previous errors; 3 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `morphism` (bench "bench") due to 14 previous errors; 3 warnings emitted
[INFO] running `Command { std: "docker" "inspect" "9415bb1f2940508d9ec33dd85969f915e29a75f82c47c3c54556e4fe99419983", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "9415bb1f2940508d9ec33dd85969f915e29a75f82c47c3c54556e4fe99419983", kill_on_drop: false }`
[INFO] [stdout] 9415bb1f2940508d9ec33dd85969f915e29a75f82c47c3c54556e4fe99419983
[INFO] checking morphism-0.4.1 against try#7622c0f807a4e13c4db886a1681bf343795692df+rustflags=-Dnon_local_definitions for pr-120393
[INFO] extracting crate morphism 0.4.1 into /workspace/builds/worker-7-tc2/source
[INFO] validating manifest of crates.io crate morphism 0.4.1 on toolchain 7622c0f807a4e13c4db886a1681bf343795692df
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+7622c0f807a4e13c4db886a1681bf343795692df" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate morphism 0.4.1
[INFO] finished tweaking crates.io crate morphism 0.4.1
[INFO] tweaked toml for crates.io crate morphism 0.4.1 written to /workspace/builds/worker-7-tc2/source/Cargo.toml
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+7622c0f807a4e13c4db886a1681bf343795692df" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+7622c0f807a4e13c4db886a1681bf343795692df" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+7622c0f807a4e13c4db886a1681bf343795692df" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 5c1f2ba121a2eb8283081775cbb2f8096b3e80435acf8a151874c1db58ff5f32
[INFO] running `Command { std: "docker" "start" "-a" "5c1f2ba121a2eb8283081775cbb2f8096b3e80435acf8a151874c1db58ff5f32", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "5c1f2ba121a2eb8283081775cbb2f8096b3e80435acf8a151874c1db58ff5f32", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "5c1f2ba121a2eb8283081775cbb2f8096b3e80435acf8a151874c1db58ff5f32", kill_on_drop: false }`
[INFO] [stdout] 5c1f2ba121a2eb8283081775cbb2f8096b3e80435acf8a151874c1db58ff5f32
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-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 -Dnon_local_definitions" "-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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+7622c0f807a4e13c4db886a1681bf343795692df" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 34ac70588e8cb8a8f774d710b7ea698afc7a462eb56a8b36bb62c7ad41231c1c
[INFO] running `Command { std: "docker" "start" "-a" "34ac70588e8cb8a8f774d710b7ea698afc7a462eb56a8b36bb62c7ad41231c1c", kill_on_drop: false }`
[INFO] [stderr]     Checking morphism v0.4.1 (/opt/rustwide/workdir)
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/lib.rs:33:35
[INFO] [stdout]    |
[INFO] [stdout] 33 |     mfns: LinkedList<VecDeque<Box<Fn(*const ()) -> *const () + 'a>>>,
[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] 33 |     mfns: LinkedList<VecDeque<Box<dyn Fn(*const ()) -> *const () + 'a>>>,
[INFO] [stdout]    |                                   +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/lib.rs:33:35
[INFO] [stdout]    |
[INFO] [stdout] 33 |     mfns: LinkedList<VecDeque<Box<Fn(*const ()) -> *const () + 'a>>>,
[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] 33 |     mfns: LinkedList<VecDeque<Box<dyn Fn(*const ()) -> *const () + 'a>>>,
[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: unused closure that must be used
[INFO] [stdout]   --> benches/bench.rs:11:9
[INFO] [stdout]    |
[INFO] [stdout] 11 |         (|| {});
[INFO] [stdout]    |         ^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: closures are lazy and do nothing unless called
[INFO] [stdout]    = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused boxed closure that must be used
[INFO] [stdout]   --> benches/bench.rs:18:9
[INFO] [stdout]    |
[INFO] [stdout] 18 |         (Box::new(|| {}));
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: closures are lazy and do nothing unless called
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused return value of `Box::<T>::new` that must be used
[INFO] [stdout]   --> benches/bench.rs:18:9
[INFO] [stdout]    |
[INFO] [stdout] 18 |         (Box::new(|| {}));
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]    |
[INFO] [stdout] 18 |         let _ = (Box::new(|| {}));
[INFO] [stdout]    |         +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: type `morphism::Void` is private
[INFO] [stdout]   --> benches/bench.rs:25:9
[INFO] [stdout]    |
[INFO] [stdout] 25 |         Morphism::new::<()>();
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^^^ private type
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: type `morphism::Void` is private
[INFO] [stdout]   --> benches/bench.rs:31:18
[INFO] [stdout]    |
[INFO] [stdout] 31 |     let f = &mut Morphism::new::<()>();
[INFO] [stdout]    |                  ^^^^^^^^^^^^^^^^^^^ private type
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: type `morphism::Void` is private
[INFO] [stdout]   --> benches/bench.rs:39:18
[INFO] [stdout]    |
[INFO] [stdout] 39 |     let f = &mut Morphism::new::<()>();
[INFO] [stdout]    |                  ^^^^^^^^^^^^^^^^^^^ private type
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: type `morphism::Void` is private
[INFO] [stdout]   --> benches/bench.rs:49:18
[INFO] [stdout]    |
[INFO] [stdout] 49 |     let f = &mut Morphism::new::<()>();
[INFO] [stdout]    |                  ^^^^^^^^^^^^^^^^^^^ private type
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: type `morphism::Void` is private
[INFO] [stdout]   --> benches/bench.rs:59:18
[INFO] [stdout]    |
[INFO] [stdout] 59 |     let f = &mut Morphism::new::<()>();
[INFO] [stdout]    |                  ^^^^^^^^^^^^^^^^^^^ private type
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: type `morphism::Void` is private
[INFO] [stdout]   --> benches/bench.rs:69:18
[INFO] [stdout]    |
[INFO] [stdout] 69 |     let f = &mut Morphism::new::<()>();
[INFO] [stdout]    |                  ^^^^^^^^^^^^^^^^^^^ private type
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: type `morphism::Void` is private
[INFO] [stdout]   --> benches/bench.rs:77:18
[INFO] [stdout]    |
[INFO] [stdout] 77 |     let f = &mut Morphism::new::<()>();
[INFO] [stdout]    |                  ^^^^^^^^^^^^^^^^^^^ private type
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: type `morphism::Void` is private
[INFO] [stdout]   --> benches/bench.rs:87:18
[INFO] [stdout]    |
[INFO] [stdout] 87 |     let f = &mut Morphism::new::<()>();
[INFO] [stdout]    |                  ^^^^^^^^^^^^^^^^^^^ private type
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: type `morphism::Void` is private
[INFO] [stdout]   --> benches/bench.rs:97:18
[INFO] [stdout]    |
[INFO] [stdout] 97 |     let f = &mut Morphism::new::<()>();
[INFO] [stdout]    |                  ^^^^^^^^^^^^^^^^^^^ private type
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: type `morphism::Void` is private
[INFO] [stdout]    --> benches/bench.rs:123:13
[INFO] [stdout]     |
[INFO] [stdout] 123 |     let f = Morphism::new::<()>().tail(|_| {});
[INFO] [stdout]     |             ^^^^^^^^^^^^^^^^^^^ private type
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: type `morphism::Void` is private
[INFO] [stdout]    --> benches/bench.rs:131:17
[INFO] [stdout]     |
[INFO] [stdout] 131 |     let mut f = Morphism::new::<()>();
[INFO] [stdout]     |                 ^^^^^^^^^^^^^^^^^^^ private type
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: type `morphism::Void` is private
[INFO] [stdout]    --> benches/bench.rs:142:17
[INFO] [stdout]     |
[INFO] [stdout] 142 |     let mut f = Morphism::new::<()>();
[INFO] [stdout]     |                 ^^^^^^^^^^^^^^^^^^^ private type
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: type `morphism::Void` is private
[INFO] [stdout]    --> benches/bench.rs:153:17
[INFO] [stdout]     |
[INFO] [stdout] 153 |     let mut f = Morphism::new::<()>();
[INFO] [stdout]     |                 ^^^^^^^^^^^^^^^^^^^ private type
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 13 previous errors; 3 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `morphism` (bench "bench") due to 14 previous errors; 3 warnings emitted
[INFO] running `Command { std: "docker" "inspect" "34ac70588e8cb8a8f774d710b7ea698afc7a462eb56a8b36bb62c7ad41231c1c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "34ac70588e8cb8a8f774d710b7ea698afc7a462eb56a8b36bb62c7ad41231c1c", kill_on_drop: false }`
[INFO] [stdout] 34ac70588e8cb8a8f774d710b7ea698afc7a462eb56a8b36bb62c7ad41231c1c
