[INFO] cloning repository https://github.com/jakub-m/rs-learning-autograd
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/jakub-m/rs-learning-autograd" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fjakub-m%2Frs-learning-autograd", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fjakub-m%2Frs-learning-autograd'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 526f7f6cb31e5282f551c6e7c174a60bf6bc9f8a
[INFO] checking jakub-m/rs-learning-autograd against c60b92c03ca8a3b101eb9d57f51e2232690638c7 for pr-164148-crater-rollup
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fjakub-m%2Frs-learning-autograd" "/workspace/builds/worker-2-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-2-tc2/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/jakub-m/rs-learning-autograd
[INFO] finished tweaking git repo https://github.com/jakub-m/rs-learning-autograd
[INFO] tweaked toml for git repo https://github.com/jakub-m/rs-learning-autograd written to /workspace/builds/worker-2-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/jakub-m/rs-learning-autograd on toolchain c60b92c03ca8a3b101eb9d57f51e2232690638c7
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+c60b92c03ca8a3b101eb9d57f51e2232690638c7" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/jakub-m/rs-learning-autograd already has a lockfile, it will not be regenerated
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+c60b92c03ca8a3b101eb9d57f51e2232690638c7" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc2/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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@sha256:77db811e55d90add9212f6832c23229e3de5f1c1f9905e8cb07319ea15df73ac" "sleep" "infinity", kill_on_drop: false }`
[INFO] [stdout] 0e976b4ef46d37c61cddca7899a053e76fa50b126c91d30fc62ff843c04fc4c3
[INFO] running `Command { std: "docker" "start" "0e976b4ef46d37c61cddca7899a053e76fa50b126c91d30fc62ff843c04fc4c3", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "0e976b4ef46d37c61cddca7899a053e76fa50b126c91d30fc62ff843c04fc4c3", 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" "0e976b4ef46d37c61cddca7899a053e76fa50b126c91d30fc62ff843c04fc4c3" "/opt/rustwide/cargo-home/bin/cargo" "+c60b92c03ca8a3b101eb9d57f51e2232690638c7" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "0e976b4ef46d37c61cddca7899a053e76fa50b126c91d30fc62ff843c04fc4c3", 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" "0e976b4ef46d37c61cddca7899a053e76fa50b126c91d30fc62ff843c04fc4c3" "/opt/rustwide/cargo-home/bin/cargo" "+c60b92c03ca8a3b101eb9d57f51e2232690638c7" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stderr]    Compiling num-traits v0.2.19
[INFO] [stderr]    Compiling matrixmultiply v0.3.9
[INFO] [stderr]     Checking rawpointer v0.2.1
[INFO] [stderr]    Compiling libc v0.2.169
[INFO] [stderr]     Checking approx_eq v0.1.8
[INFO] [stderr]    Compiling quote v1.0.37
[INFO] [stderr]    Compiling syn v2.0.91
[INFO] [stderr]     Checking getrandom v0.2.15
[INFO] [stderr]     Checking rand_core v0.6.4
[INFO] [stderr]     Checking num-complex v0.4.6
[INFO] [stderr]     Checking num-integer v0.1.46
[INFO] [stderr]     Checking ndarray v0.16.1
[INFO] [stderr]    Compiling zerocopy-derive v0.7.35
[INFO] [stderr]     Checking zerocopy v0.7.35
[INFO] [stderr]     Checking ppv-lite86 v0.2.20
[INFO] [stderr]     Checking rand_chacha v0.3.1
[INFO] [stderr]     Checking rand v0.8.5
[INFO] [stderr]     Checking rs-autograd v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: function `conv2d_adjoin` is never used
[INFO] [stdout]   --> src/nar/conv.rs:62:8
[INFO] [stdout]    |
[INFO] [stdout] 62 | pub fn conv2d_adjoin<A>(
[INFO] [stdout]    |        ^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `0` is never read
[INFO] [stdout]   --> src/nar/conv.rs:96:22
[INFO] [stdout]    |
[INFO] [stdout] 96 | struct BadShapeError(String);
[INFO] [stdout]    |        ------------- ^^^^^^
[INFO] [stdout]    |        |
[INFO] [stdout]    |        field in this struct
[INFO] [stdout]    |
[INFO] [stdout]    = help: consider removing this field
[INFO] [stdout]    = note: `BadShapeError` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait `V2Helper` is never used
[INFO] [stdout]    --> src/nar/conv.rs:104:7
[INFO] [stdout]     |
[INFO] [stdout] 104 | trait V2Helper {
[INFO] [stdout]     |       ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait `ShapeHelper` is never used
[INFO] [stdout]    --> src/nar/conv.rs:115:7
[INFO] [stdout]     |
[INFO] [stdout] 115 | trait ShapeHelper {
[INFO] [stdout]     |       ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `V2` is never constructed
[INFO] [stdout]  --> src/nar/conv_iter.rs:6:12
[INFO] [stdout]   |
[INFO] [stdout] 6 | pub struct V2(pub usize, pub usize);
[INFO] [stdout]   |            ^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: methods `iter`, `contains`, and `try_sub` are never used
[INFO] [stdout]   --> src/nar/conv_iter.rs:9:12
[INFO] [stdout]    |
[INFO] [stdout]  8 | impl V2 {
[INFO] [stdout]    | ------- methods in this implementation
[INFO] [stdout]  9 |     pub fn iter(&self) -> V2Iterator {
[INFO] [stdout]    |            ^^^^
[INFO] [stdout] ...
[INFO] [stdout] 17 |     pub fn contains(&self, other: V2) -> Option<V2> {
[INFO] [stdout]    |            ^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 25 |     fn try_sub(&self, other: V2) -> Option<V2> {
[INFO] [stdout]    |        ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `V2Iterator` is never constructed
[INFO] [stdout]   --> src/nar/conv_iter.rs:36:12
[INFO] [stdout]    |
[INFO] [stdout] 36 | pub struct V2Iterator {
[INFO] [stdout]    |            ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: useless conversion to the same type: `f32` rs_autograd
[INFO] [stdout]   --> src/float/calculator.rs:52:18
[INFO] [stdout]    |
[INFO] [stdout] 52 |               } => match op {
[INFO] [stdout]    |  __________________^
[INFO] [stdout] 53 | |                 FloatOperAry2::Add => {
[INFO] [stdout] 54 | |                     let a = cg.forward(&a);
[INFO] [stdout] 55 | |                     let b = cg.forward(&b);
[INFO] [stdout] ...  |
[INFO] [stdout] 74 | |             .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: `#[deny(self_type_conversion)]` on by default
[INFO] [stdout] help: consider removing the conversion call
[INFO] [stdout]    |
[INFO] [stdout] 73 -             }
[INFO] [stdout] 74 -             .into(),
[INFO] [stdout] 73 +             },
[INFO] [stdout]    |
[INFO] [stdout] help: you can use the fully-qualified path to avoid triggering this lint
[INFO] [stdout]    |
[INFO] [stdout] 52 ~             } => <f32 as Into<_>>::into(match op {
[INFO] [stdout] 53 |                 FloatOperAry2::Add => {
[INFO] [stdout] ...
[INFO] [stdout] 72 |                 }
[INFO] [stdout] 73 ~             }),
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]    --> src/float/syntax.rs:137:27
[INFO] [stdout]     |
[INFO] [stdout] 137 |     fn as_const(self, eb: &ExprBuilder<f32, FloatOperAry1, FloatOperAry2>) -> ExprFloat;
[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] 137 |     fn as_const(self, eb: &ExprBuilder<f32, FloatOperAry1, FloatOperAry2>) -> ExprFloat<'_>;
[INFO] [stdout]     |                                                                                        ++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]    --> src/float/syntax.rs:141:27
[INFO] [stdout]     |
[INFO] [stdout] 141 |     fn as_const(self, eb: &ExprBuilder<f32, FloatOperAry1, FloatOperAry2>) -> ExprFloat {
[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] 141 |     fn as_const(self, eb: &ExprBuilder<f32, FloatOperAry1, FloatOperAry2>) -> ExprFloat<'_> {
[INFO] [stdout]     |                                                                                        ++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `rs-autograd` (lib) due to 1 previous error; 9 warnings emitted
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stdout] warning: unused variable: `a`
[INFO] [stdout]    --> src/nar/syntax.rs:212:13
[INFO] [stdout]     |
[INFO] [stdout] 212 |         let a = a + a;
[INFO] [stdout]     |             ^ help: if this is intentional, prefix it with an underscore: `_a`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `conv2d_adjoin` is never used
[INFO] [stdout]   --> src/nar/conv.rs:62:8
[INFO] [stdout]    |
[INFO] [stdout] 62 | pub fn conv2d_adjoin<A>(
[INFO] [stdout]    |        ^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `0` is never read
[INFO] [stdout]   --> src/nar/conv.rs:96:22
[INFO] [stdout]    |
[INFO] [stdout] 96 | struct BadShapeError(String);
[INFO] [stdout]    |        ------------- ^^^^^^
[INFO] [stdout]    |        |
[INFO] [stdout]    |        field in this struct
[INFO] [stdout]    |
[INFO] [stdout]    = help: consider removing this field
[INFO] [stdout]    = note: `BadShapeError` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait `V2Helper` is never used
[INFO] [stdout]    --> src/nar/conv.rs:104:7
[INFO] [stdout]     |
[INFO] [stdout] 104 | trait V2Helper {
[INFO] [stdout]     |       ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait `ShapeHelper` is never used
[INFO] [stdout]    --> src/nar/conv.rs:115:7
[INFO] [stdout]     |
[INFO] [stdout] 115 | trait ShapeHelper {
[INFO] [stdout]     |       ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `shape2` is never used
[INFO] [stdout]    --> src/nar/conv.rs:250:8
[INFO] [stdout]     |
[INFO] [stdout] 250 |     fn shape2(r: usize, c: usize) -> nd::Ix2 {
[INFO] [stdout]     |        ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `new_arr_inc_f32` is never used
[INFO] [stdout]    --> src/nar/conv.rs:258:8
[INFO] [stdout]     |
[INFO] [stdout] 258 |     fn new_arr_inc_f32(nrows: usize, ncols: usize) -> nd::Array2<f32> {
[INFO] [stdout]     |        ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `contains` is never used
[INFO] [stdout]   --> src/nar/conv_iter.rs:17:12
[INFO] [stdout]    |
[INFO] [stdout]  8 | impl V2 {
[INFO] [stdout]    | ------- method in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 17 |     pub fn contains(&self, other: V2) -> Option<V2> {
[INFO] [stdout]    |            ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: useless conversion to the same type: `f32` rs_autograd
[INFO] [stdout]   --> src/float/calculator.rs:52:18
[INFO] [stdout]    |
[INFO] [stdout] 52 |               } => match op {
[INFO] [stdout]    |  __________________^
[INFO] [stdout] 53 | |                 FloatOperAry2::Add => {
[INFO] [stdout] 54 | |                     let a = cg.forward(&a);
[INFO] [stdout] 55 | |                     let b = cg.forward(&b);
[INFO] [stdout] ...  |
[INFO] [stdout] 74 | |             .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: `#[deny(self_type_conversion)]` on by default
[INFO] [stdout] help: consider removing the conversion call
[INFO] [stdout]    |
[INFO] [stdout] 73 -             }
[INFO] [stdout] 74 -             .into(),
[INFO] [stdout] 73 +             },
[INFO] [stdout]    |
[INFO] [stdout] help: you can use the fully-qualified path to avoid triggering this lint
[INFO] [stdout]    |
[INFO] [stdout] 52 ~             } => <f32 as Into<_>>::into(match op {
[INFO] [stdout] 53 |                 FloatOperAry2::Add => {
[INFO] [stdout] ...
[INFO] [stdout] 72 |                 }
[INFO] [stdout] 73 ~             }),
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]    --> src/float/syntax.rs:137:27
[INFO] [stdout]     |
[INFO] [stdout] 137 |     fn as_const(self, eb: &ExprBuilder<f32, FloatOperAry1, FloatOperAry2>) -> ExprFloat;
[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] 137 |     fn as_const(self, eb: &ExprBuilder<f32, FloatOperAry1, FloatOperAry2>) -> ExprFloat<'_>;
[INFO] [stdout]     |                                                                                        ++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]    --> src/float/syntax.rs:141:27
[INFO] [stdout]     |
[INFO] [stdout] 141 |     fn as_const(self, eb: &ExprBuilder<f32, FloatOperAry1, FloatOperAry2>) -> ExprFloat {
[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] 141 |     fn as_const(self, eb: &ExprBuilder<f32, FloatOperAry1, FloatOperAry2>) -> ExprFloat<'_> {
[INFO] [stdout]     |                                                                                        ++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `rs-autograd` (lib test) due to 1 previous error; 10 warnings emitted
[INFO] running `Command { std: "docker" "inspect" "0e976b4ef46d37c61cddca7899a053e76fa50b126c91d30fc62ff843c04fc4c3", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "0e976b4ef46d37c61cddca7899a053e76fa50b126c91d30fc62ff843c04fc4c3", kill_on_drop: false }`
[INFO] [stdout] 0e976b4ef46d37c61cddca7899a053e76fa50b126c91d30fc62ff843c04fc4c3
