[INFO] fetching crate morphism 0.4.1...
[INFO] checking morphism-0.4.1 against master#936f2600b6c903b04387f74ed5cbce88bb06d243 for pr-91141
[INFO] extracting crate morphism 0.4.1 into /workspace/builds/worker-47/source
[INFO] validating manifest of crates.io crate morphism 0.4.1 on toolchain 936f2600b6c903b04387f74ed5cbce88bb06d243
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+936f2600b6c903b04387f74ed5cbce88bb06d243" "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-47/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+936f2600b6c903b04387f74ed5cbce88bb06d243" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+936f2600b6c903b04387f74ed5cbce88bb06d243" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-47/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-47/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@sha256:5736fa189c1c60b01babf4b8b698fe57b6ecc41933a7ff2e0b8d7a221459412b" "/opt/rustwide/cargo-home/bin/cargo" "+936f2600b6c903b04387f74ed5cbce88bb06d243" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 68a2f5cfba621712f1973cdf65477605fb5b86e5db5aacfaf9e47c6db20d20cc
[INFO] running `Command { std: "docker" "start" "-a" "68a2f5cfba621712f1973cdf65477605fb5b86e5db5aacfaf9e47c6db20d20cc", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "68a2f5cfba621712f1973cdf65477605fb5b86e5db5aacfaf9e47c6db20d20cc", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "68a2f5cfba621712f1973cdf65477605fb5b86e5db5aacfaf9e47c6db20d20cc", kill_on_drop: false }`
[INFO] [stdout] 68a2f5cfba621712f1973cdf65477605fb5b86e5db5aacfaf9e47c6db20d20cc
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-47/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-47/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" "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@sha256:5736fa189c1c60b01babf4b8b698fe57b6ecc41933a7ff2e0b8d7a221459412b" "/opt/rustwide/cargo-home/bin/cargo" "+936f2600b6c903b04387f74ed5cbce88bb06d243" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] c37b43d23234184ee48c731f00ad35ba932999ce410f14b266d407be20761e57
[INFO] running `Command { std: "docker" "start" "-a" "c37b43d23234184ee48c731f00ad35ba932999ce410f14b266d407be20761e57", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[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]    |                                   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn Fn(*const ()) -> *const () + 'a`
[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] 
[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]    |                                   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn Fn(*const ()) -> *const () + 'a`
[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] 
[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: `#[warn(unused_must_use)]` on by default
[INFO] [stdout]    = note: closures are lazy and do nothing unless called
[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] 
[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` due to 14 previous errors; 3 warnings emitted
[INFO] running `Command { std: "docker" "inspect" "c37b43d23234184ee48c731f00ad35ba932999ce410f14b266d407be20761e57", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c37b43d23234184ee48c731f00ad35ba932999ce410f14b266d407be20761e57", kill_on_drop: false }`
[INFO] [stdout] c37b43d23234184ee48c731f00ad35ba932999ce410f14b266d407be20761e57