[INFO] fetching crate nncombinator 0.9.0...
[INFO] checking nncombinator-0.9.0 against try#2cbf9c3ff35600794d69a7dc7ab399810a067910 for pr-129249-2
[INFO] extracting crate nncombinator 0.9.0 into /workspace/builds/worker-3-tc2/source
[INFO] started tweaking crates.io crate nncombinator 0.9.0
[INFO] removed 0 missing tests
[INFO] finished tweaking crates.io crate nncombinator 0.9.0
[INFO] tweaked toml for crates.io crate nncombinator 0.9.0 written to /workspace/builds/worker-3-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate nncombinator 0.9.0 on toolchain 2cbf9c3ff35600794d69a7dc7ab399810a067910
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+2cbf9c3ff35600794d69a7dc7ab399810a067910" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+2cbf9c3ff35600794d69a7dc7ab399810a067910" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]      Locking 88 packages to latest compatible versions
[INFO] [stderr]       Adding image v0.24.9 (available: v0.25.10)
[INFO] [stderr]       Adding mnist v0.5.0 (available: v0.6.0)
[INFO] [stderr]       Adding rand v0.8.6 (available: v0.10.1)
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[INFO] [stderr]       Adding rand_xorshift v0.3.0 (available: v0.5.0)
[INFO] [stderr]       Adding statrs v0.15.0 (available: v0.18.0)
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+2cbf9c3ff35600794d69a7dc7ab399810a067910" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc2/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc2/target:/opt/rustwide/target:rw,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" "-m" "1610612736" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:3a6becf2bc8dde7f3fa57ede90e4f284e72d296796fc446bbb1e2c7cc0530151" "sleep" "infinity", kill_on_drop: false }`
[INFO] [stdout] 97432622f218d7bab09cc007724eba1d99907e67179798c4ac09232738173a09
[INFO] running `Command { std: "docker" "start" "97432622f218d7bab09cc007724eba1d99907e67179798c4ac09232738173a09", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "exec" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-w" "/opt/rustwide/workdir" "--user" "0:0" "97432622f218d7bab09cc007724eba1d99907e67179798c4ac09232738173a09" "/opt/rustwide/cargo-home/bin/cargo" "+2cbf9c3ff35600794d69a7dc7ab399810a067910" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "97432622f218d7bab09cc007724eba1d99907e67179798c4ac09232738173a09", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "exec" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-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" "-w" "/opt/rustwide/workdir" "--user" "0:0" "97432622f218d7bab09cc007724eba1d99907e67179798c4ac09232738173a09" "/opt/rustwide/cargo-home/bin/cargo" "+2cbf9c3ff35600794d69a7dc7ab399810a067910" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stderr]    Compiling libm v0.2.16
[INFO] [stderr]    Compiling syn v2.0.118
[INFO] [stderr]    Compiling num-traits v0.2.19
[INFO] [stderr]    Compiling zerocopy v0.8.52
[INFO] [stderr]    Compiling glob v0.3.3
[INFO] [stderr]     Checking getrandom v0.2.17
[INFO] [stderr]    Compiling rcublas-sys v0.5.0
[INFO] [stderr]    Compiling rcudnn-sys v0.5.0
[INFO] [stderr]    Compiling syn v1.0.109
[INFO] [stderr]     Checking rand_core v0.6.4
[INFO] [stderr]    Compiling cuda-config v0.1.0
[INFO] [stderr]    Compiling matrixmultiply v0.3.10
[INFO] [stderr]    Compiling serde_core v1.0.228
[INFO] [stderr]     Checking weezl v0.1.12
[INFO] [stderr]    Compiling cuda-runtime-sys v0.3.0-alpha.1
[INFO] [stderr]    Compiling nncombinator v0.9.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Checking jpeg-decoder v0.3.2
[INFO] [stderr]     Checking zune-inflate v0.2.54
[INFO] [stderr]     Checking smallvec v1.15.2
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[INFO] [stderr]     Checking rand_xorshift v0.3.0
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[INFO] [stderr]    Compiling zerocopy-derive v0.8.52
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[INFO] [stdout] warning: useless conversion to the same type: `arr::Arr<U, NO>`
[INFO] [stdout]    --> src/device/linear.rs:140:12
[INFO] [stdout]     |
[INFO] [stdout] 140 |         Ok(loss.into())
[INFO] [stdout]     |            ^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this method call relies on the `impl<T> Into<T> for T` blanket implementation and type inference, which is a semver hazard as a new `impl Into<_>` that affects your type might be added in the future causing type inference errors
[INFO] [stdout]     = note: you can instead use the fully-qualified path `<arr::Arr<U, NO> as Into<arr::Arr<U, NO>>::into(val) to avoid triggering this lint
[INFO] [stdout]     = note: `#[warn(self_type_conversion)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: useless conversion to the same type: `CudaTensor1dPtr<U, NO>`
[INFO] [stdout]    --> src/device/linear.rs:270:12
[INFO] [stdout]     |
[INFO] [stdout] 270 |         Ok(loss.into())
[INFO] [stdout]     |            ^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this method call relies on the `impl<T> Into<T> for T` blanket implementation and type inference, which is a semver hazard as a new `impl Into<_>` that affects your type might be added in the future causing type inference errors
[INFO] [stdout]     = note: you can instead use the fully-qualified path `<CudaTensor1dPtr<U, NO> as Into<CudaTensor1dPtr<U, NO>>::into(val) to avoid triggering this lint
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: useless conversion to the same type: `CudaTensor1dPtr<U, N>`
[INFO] [stdout]    --> src/device/output.rs:164:79
[INFO] [stdout]     |
[INFO] [stdout] 164 |         let mut args = LossLinearByCanonicalLinkArgs::new(&expected, &actual, output.into(), N);
[INFO] [stdout]     |                                                                               ^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this method call relies on the `impl<T> Into<T> for T` blanket implementation and type inference, which is a semver hazard as a new `impl Into<_>` that affects your type might be added in the future causing type inference errors
[INFO] [stdout]     = note: you can instead use the fully-qualified path `<CudaTensor1dPtr<U, N> as Into<CudaTensor1dPtr<U, N>>::into(val) to avoid triggering this lint
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: useless conversion to the same type: `T`
[INFO] [stdout]    --> src/computational_graph.rs:115:13
[INFO] [stdout]     |
[INFO] [stdout] 115 |             d.clone().into()
[INFO] [stdout]     |             ^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this method call relies on the `impl<T> Into<T> for T` blanket implementation and type inference, which is a semver hazard as a new `impl Into<_>` that affects your type might be added in the future causing type inference errors
[INFO] [stdout]     = note: you can instead use the fully-qualified path `<T as Into<T>::into(val) to avoid triggering this lint
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: useless conversion to the same type: `T`
[INFO] [stdout]    --> src/computational_graph.rs:134:13
[INFO] [stdout]     |
[INFO] [stdout] 134 |             d.clone().into()
[INFO] [stdout]     |             ^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this method call relies on the `impl<T> Into<T> for T` blanket implementation and type inference, which is a semver hazard as a new `impl Into<_>` that affects your type might be added in the future causing type inference errors
[INFO] [stdout]     = note: you can instead use the fully-qualified path `<T as Into<T>::into(val) to avoid triggering this lint
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: useless conversion to the same type: `&PI`
[INFO] [stdout]    --> src/layer/linear.rs:315:59
[INFO] [stdout]     |
[INFO] [stdout] 315 |         self.device.forward_linear(&self.bias,&self.units,input.into())
[INFO] [stdout]     |                                                           ^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this method call relies on the `impl<T> Into<T> for T` blanket implementation and type inference, which is a semver hazard as a new `impl Into<_>` that affects your type might be added in the future causing type inference errors
[INFO] [stdout]     = note: you can instead use the fully-qualified path `<&PI as Into<&PI>::into(val) to avoid triggering this lint
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: useless conversion to the same type: `&PI`
[INFO] [stdout]    --> src/layer/linear.rs:392:50
[INFO] [stdout]     |
[INFO] [stdout] 392 |             self.device.backward_weight_gradient(o.into(),&loss)
[INFO] [stdout]     |                                                  ^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this method call relies on the `impl<T> Into<T> for T` blanket implementation and type inference, which is a semver hazard as a new `impl Into<_>` that affects your type might be added in the future causing type inference errors
[INFO] [stdout]     = note: you can instead use the fully-qualified path `<&PI as Into<&PI>::into(val) to avoid triggering this lint
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: useless conversion to the same type: `PI`
[INFO] [stdout]    --> src/layer/linear.rs:397:41
[INFO] [stdout]     |
[INFO] [stdout] 397 |         let (s,loss) = self.parent.loss(next_loss.into(),lossf,s)?;
[INFO] [stdout]     |                                         ^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this method call relies on the `impl<T> Into<T> for T` blanket implementation and type inference, which is a semver hazard as a new `impl Into<_>` that affects your type might be added in the future causing type inference errors
[INFO] [stdout]     = note: you can instead use the fully-qualified path `<PI as Into<PI>::into(val) to avoid triggering this lint
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: useless conversion to the same type: `PI`
[INFO] [stdout]    --> src/layer/activation.rs:135:34
[INFO] [stdout]     |
[INFO] [stdout] 135 |         self.parent.backward_all(input.into(), s, lossf)
[INFO] [stdout]     |                                  ^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this method call relies on the `impl<T> Into<T> for T` blanket implementation and type inference, which is a semver hazard as a new `impl Into<_>` that affects your type might be added in the future causing type inference errors
[INFO] [stdout]     = note: you can instead use the fully-qualified path `<PI as Into<PI>::into(val) to avoid triggering this lint
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: useless conversion to the same type: `PI`
[INFO] [stdout]    --> src/layer/activation.rs:179:23
[INFO] [stdout]     |
[INFO] [stdout] 179 |         Ok((Cons(s,o),r.into()))
[INFO] [stdout]     |                       ^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this method call relies on the `impl<T> Into<T> for T` blanket implementation and type inference, which is a semver hazard as a new `impl Into<_>` that affects your type might be added in the future causing type inference errors
[INFO] [stdout]     = note: you can instead use the fully-qualified path `<PI as Into<PI>::into(val) to avoid triggering this lint
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: useless conversion to the same type: `(<P as BackwardAll<U>>::LossOutput, <P as UpdateWeight<U>>::GradientStack)`
[INFO] [stdout]    --> src/layer/bridge.rs:102:12
[INFO] [stdout]     |
[INFO] [stdout] 102 |         Ok(self.parent.backward_all(input.into(), stack, lossf)?.into())
[INFO] [stdout]     |            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this method call relies on the `impl<T> Into<T> for T` blanket implementation and type inference, which is a semver hazard as a new `impl Into<_>` that affects your type might be added in the future causing type inference errors
[INFO] [stdout]     = note: you can instead use the fully-qualified path `<(<P as BackwardAll<U>>::LossOutput, <P as UpdateWeight<U>>::GradientStack) as Into<(<P as BackwardAll<U>>::LossOutput, <P as UpdateWeight<U>>::GradientStack)>::into(val) to avoid triggering this lint
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: useless conversion to the same type: `PI`
[INFO] [stdout]    --> src/layer/bias.rs:263:46
[INFO] [stdout]     |
[INFO] [stdout] 263 |         let (s,next_loss) = self.parent.loss(next_loss.into(),lossf,s)?;
[INFO] [stdout]     |                                              ^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this method call relies on the `impl<T> Into<T> for T` blanket implementation and type inference, which is a semver hazard as a new `impl Into<_>` that affects your type might be added in the future causing type inference errors
[INFO] [stdout]     = note: you can instead use the fully-qualified path `<PI as Into<PI>::into(val) to avoid triggering this lint
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]     --> src/arr.rs:1391:17
[INFO] [stdout]      |
[INFO] [stdout] 1391 |     pub fn iter(&self) -> SerializedVecIter<U,T> {
[INFO] [stdout]      |                 ^^^^^     ^^^^^^^^^^^^^^^^^^^^^^ the same lifetime is hidden here
[INFO] [stdout]      |                 |
[INFO] [stdout]      |                 the lifetime is elided here
[INFO] [stdout]      |
[INFO] [stdout]      = help: the same lifetime is referred to in inconsistent ways, making the signature confusing
[INFO] [stdout]      = note: `#[warn(mismatched_lifetime_syntaxes)]` on by default
[INFO] [stdout] help: use `'_` for type paths
[INFO] [stdout]      |
[INFO] [stdout] 1391 |     pub fn iter(&self) -> SerializedVecIter<'_, U,T> {
[INFO] [stdout]      |                                             +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]     --> src/arr.rs:1412:21
[INFO] [stdout]      |
[INFO] [stdout] 1412 |     pub fn iter_mut(&mut self) -> SerializedVecIterMut<U,T> {
[INFO] [stdout]      |                     ^^^^^^^^^     ^^^^^^^^^^^^^^^^^^^^^^^^^ the same lifetime is hidden here
[INFO] [stdout]      |                     |
[INFO] [stdout]      |                     the lifetime is elided here
[INFO] [stdout]      |
[INFO] [stdout]      = help: the same lifetime is referred to in inconsistent ways, making the signature confusing
[INFO] [stdout] help: use `'_` for type paths
[INFO] [stdout]      |
[INFO] [stdout] 1412 |     pub fn iter_mut(&mut self) -> SerializedVecIterMut<'_, U,T> {
[INFO] [stdout]      |                                                        +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Checking ppv-lite86 v0.2.21
[INFO] [stderr]     Checking half v2.7.1
[INFO] [stderr]     Checking exr v1.74.0
[INFO] [stderr]     Checking rand_chacha v0.3.1
[INFO] [stderr]     Checking rand v0.8.6
[INFO] [stderr]     Checking rand_distr v0.4.3
[INFO] [stderr]     Checking nalgebra v0.27.1
[INFO] [stderr]     Checking image v0.24.9
[INFO] [stderr]     Checking statrs v0.15.0
[INFO] [stdout] warning: useless conversion to the same type: `arr::Arr<U, NO>`
[INFO] [stdout]    --> src/device/linear.rs:140:12
[INFO] [stdout]     |
[INFO] [stdout] 140 |         Ok(loss.into())
[INFO] [stdout]     |            ^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this method call relies on the `impl<T> Into<T> for T` blanket implementation and type inference, which is a semver hazard as a new `impl Into<_>` that affects your type might be added in the future causing type inference errors
[INFO] [stdout]     = note: you can instead use the fully-qualified path `<arr::Arr<U, NO> as Into<arr::Arr<U, NO>>::into(val) to avoid triggering this lint
[INFO] [stdout]     = note: `#[warn(self_type_conversion)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: useless conversion to the same type: `CudaTensor1dPtr<U, NO>`
[INFO] [stdout]    --> src/device/linear.rs:270:12
[INFO] [stdout]     |
[INFO] [stdout] 270 |         Ok(loss.into())
[INFO] [stdout]     |            ^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this method call relies on the `impl<T> Into<T> for T` blanket implementation and type inference, which is a semver hazard as a new `impl Into<_>` that affects your type might be added in the future causing type inference errors
[INFO] [stdout]     = note: you can instead use the fully-qualified path `<CudaTensor1dPtr<U, NO> as Into<CudaTensor1dPtr<U, NO>>::into(val) to avoid triggering this lint
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: useless conversion to the same type: `CudaTensor1dPtr<U, N>`
[INFO] [stdout]    --> src/device/output.rs:164:79
[INFO] [stdout]     |
[INFO] [stdout] 164 |         let mut args = LossLinearByCanonicalLinkArgs::new(&expected, &actual, output.into(), N);
[INFO] [stdout]     |                                                                               ^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this method call relies on the `impl<T> Into<T> for T` blanket implementation and type inference, which is a semver hazard as a new `impl Into<_>` that affects your type might be added in the future causing type inference errors
[INFO] [stdout]     = note: you can instead use the fully-qualified path `<CudaTensor1dPtr<U, N> as Into<CudaTensor1dPtr<U, N>>::into(val) to avoid triggering this lint
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: useless conversion to the same type: `T`
[INFO] [stdout]    --> src/computational_graph.rs:115:13
[INFO] [stdout]     |
[INFO] [stdout] 115 |             d.clone().into()
[INFO] [stdout]     |             ^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this method call relies on the `impl<T> Into<T> for T` blanket implementation and type inference, which is a semver hazard as a new `impl Into<_>` that affects your type might be added in the future causing type inference errors
[INFO] [stdout]     = note: you can instead use the fully-qualified path `<T as Into<T>::into(val) to avoid triggering this lint
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: useless conversion to the same type: `T`
[INFO] [stdout]    --> src/computational_graph.rs:134:13
[INFO] [stdout]     |
[INFO] [stdout] 134 |             d.clone().into()
[INFO] [stdout]     |             ^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this method call relies on the `impl<T> Into<T> for T` blanket implementation and type inference, which is a semver hazard as a new `impl Into<_>` that affects your type might be added in the future causing type inference errors
[INFO] [stdout]     = note: you can instead use the fully-qualified path `<T as Into<T>::into(val) to avoid triggering this lint
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: useless conversion to the same type: `&PI`
[INFO] [stdout]    --> src/layer/linear.rs:315:59
[INFO] [stdout]     |
[INFO] [stdout] 315 |         self.device.forward_linear(&self.bias,&self.units,input.into())
[INFO] [stdout]     |                                                           ^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this method call relies on the `impl<T> Into<T> for T` blanket implementation and type inference, which is a semver hazard as a new `impl Into<_>` that affects your type might be added in the future causing type inference errors
[INFO] [stdout]     = note: you can instead use the fully-qualified path `<&PI as Into<&PI>::into(val) to avoid triggering this lint
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: useless conversion to the same type: `&PI`
[INFO] [stdout]    --> src/layer/linear.rs:392:50
[INFO] [stdout]     |
[INFO] [stdout] 392 |             self.device.backward_weight_gradient(o.into(),&loss)
[INFO] [stdout]     |                                                  ^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this method call relies on the `impl<T> Into<T> for T` blanket implementation and type inference, which is a semver hazard as a new `impl Into<_>` that affects your type might be added in the future causing type inference errors
[INFO] [stdout]     = note: you can instead use the fully-qualified path `<&PI as Into<&PI>::into(val) to avoid triggering this lint
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: useless conversion to the same type: `PI`
[INFO] [stdout]    --> src/layer/linear.rs:397:41
[INFO] [stdout]     |
[INFO] [stdout] 397 |         let (s,loss) = self.parent.loss(next_loss.into(),lossf,s)?;
[INFO] [stdout]     |                                         ^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this method call relies on the `impl<T> Into<T> for T` blanket implementation and type inference, which is a semver hazard as a new `impl Into<_>` that affects your type might be added in the future causing type inference errors
[INFO] [stdout]     = note: you can instead use the fully-qualified path `<PI as Into<PI>::into(val) to avoid triggering this lint
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: useless conversion to the same type: `PI`
[INFO] [stdout]    --> src/layer/activation.rs:135:34
[INFO] [stdout]     |
[INFO] [stdout] 135 |         self.parent.backward_all(input.into(), s, lossf)
[INFO] [stdout]     |                                  ^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this method call relies on the `impl<T> Into<T> for T` blanket implementation and type inference, which is a semver hazard as a new `impl Into<_>` that affects your type might be added in the future causing type inference errors
[INFO] [stdout]     = note: you can instead use the fully-qualified path `<PI as Into<PI>::into(val) to avoid triggering this lint
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: useless conversion to the same type: `PI`
[INFO] [stdout]    --> src/layer/activation.rs:179:23
[INFO] [stdout]     |
[INFO] [stdout] 179 |         Ok((Cons(s,o),r.into()))
[INFO] [stdout]     |                       ^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this method call relies on the `impl<T> Into<T> for T` blanket implementation and type inference, which is a semver hazard as a new `impl Into<_>` that affects your type might be added in the future causing type inference errors
[INFO] [stdout]     = note: you can instead use the fully-qualified path `<PI as Into<PI>::into(val) to avoid triggering this lint
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: useless conversion to the same type: `(<P as BackwardAll<U>>::LossOutput, <P as UpdateWeight<U>>::GradientStack)`
[INFO] [stdout]    --> src/layer/bridge.rs:102:12
[INFO] [stdout]     |
[INFO] [stdout] 102 |         Ok(self.parent.backward_all(input.into(), stack, lossf)?.into())
[INFO] [stdout]     |            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this method call relies on the `impl<T> Into<T> for T` blanket implementation and type inference, which is a semver hazard as a new `impl Into<_>` that affects your type might be added in the future causing type inference errors
[INFO] [stdout]     = note: you can instead use the fully-qualified path `<(<P as BackwardAll<U>>::LossOutput, <P as UpdateWeight<U>>::GradientStack) as Into<(<P as BackwardAll<U>>::LossOutput, <P as UpdateWeight<U>>::GradientStack)>::into(val) to avoid triggering this lint
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: useless conversion to the same type: `PI`
[INFO] [stdout]    --> src/layer/bias.rs:263:46
[INFO] [stdout]     |
[INFO] [stdout] 263 |         let (s,next_loss) = self.parent.loss(next_loss.into(),lossf,s)?;
[INFO] [stdout]     |                                              ^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this method call relies on the `impl<T> Into<T> for T` blanket implementation and type inference, which is a semver hazard as a new `impl Into<_>` that affects your type might be added in the future causing type inference errors
[INFO] [stdout]     = note: you can instead use the fully-qualified path `<PI as Into<PI>::into(val) to avoid triggering this lint
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]     --> src/arr.rs:1391:17
[INFO] [stdout]      |
[INFO] [stdout] 1391 |     pub fn iter(&self) -> SerializedVecIter<U,T> {
[INFO] [stdout]      |                 ^^^^^     ^^^^^^^^^^^^^^^^^^^^^^ the same lifetime is hidden here
[INFO] [stdout]      |                 |
[INFO] [stdout]      |                 the lifetime is elided here
[INFO] [stdout]      |
[INFO] [stdout]      = help: the same lifetime is referred to in inconsistent ways, making the signature confusing
[INFO] [stdout]      = note: `#[warn(mismatched_lifetime_syntaxes)]` on by default
[INFO] [stdout] help: use `'_` for type paths
[INFO] [stdout]      |
[INFO] [stdout] 1391 |     pub fn iter(&self) -> SerializedVecIter<'_, U,T> {
[INFO] [stdout]      |                                             +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]     --> src/arr.rs:1412:21
[INFO] [stdout]      |
[INFO] [stdout] 1412 |     pub fn iter_mut(&mut self) -> SerializedVecIterMut<U,T> {
[INFO] [stdout]      |                     ^^^^^^^^^     ^^^^^^^^^^^^^^^^^^^^^^^^^ the same lifetime is hidden here
[INFO] [stdout]      |                     |
[INFO] [stdout]      |                     the lifetime is elided here
[INFO] [stdout]      |
[INFO] [stdout]      = help: the same lifetime is referred to in inconsistent ways, making the signature confusing
[INFO] [stdout] help: use `'_` for type paths
[INFO] [stdout]      |
[INFO] [stdout] 1412 |     pub fn iter_mut(&mut self) -> SerializedVecIterMut<'_, U,T> {
[INFO] [stdout]      |                                                        +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 52.07s
[INFO] [stderr] warning: the following packages contain code that will be rejected by a future version of Rust: nalgebra v0.27.1
[INFO] [stderr] note: to see what the problems were, use the option `--future-incompat-report`, or run `cargo report future-incompatibilities --id 14`
[INFO] running `Command { std: "docker" "inspect" "97432622f218d7bab09cc007724eba1d99907e67179798c4ac09232738173a09", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "97432622f218d7bab09cc007724eba1d99907e67179798c4ac09232738173a09", kill_on_drop: false }`
[INFO] [stdout] 97432622f218d7bab09cc007724eba1d99907e67179798c4ac09232738173a09
