[INFO] cloning repository https://github.com/vishusandy/mazes
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/vishusandy/mazes" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fvishusandy%2Fmazes", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fvishusandy%2Fmazes'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] a17605161306e9fefe24240c7f1c5a1aee8b57c2
[INFO] checking vishusandy/mazes against try#0611f7de057c584b8771102fde7aed6c70c71d3b for pr-146440
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fvishusandy%2Fmazes" "/workspace/builds/worker-3-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-3-tc2/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/vishusandy/mazes
[INFO] finished tweaking git repo https://github.com/vishusandy/mazes
[INFO] tweaked toml for git repo https://github.com/vishusandy/mazes written to /workspace/builds/worker-3-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/vishusandy/mazes on toolchain 0611f7de057c584b8771102fde7aed6c70c71d3b
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+0611f7de057c584b8771102fde7aed6c70c71d3b" "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" "+0611f7de057c584b8771102fde7aed6c70c71d3b" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]      Locking 94 packages to latest compatible versions
[INFO] [stderr]       Adding image v0.23.14 (available: v0.25.10)
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[INFO] [stderr]       Adding webp-animation v0.5.0 (available: v0.10.0)
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+0611f7de057c584b8771102fde7aed6c70c71d3b" "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/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+0611f7de057c584b8771102fde7aed6c70c71d3b" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 67fdd3b74cd910d250dc841ee73176d8423c74144f611deadcacc10d0865ceba
[INFO] running `Command { std: "docker" "start" "-a" "67fdd3b74cd910d250dc841ee73176d8423c74144f611deadcacc10d0865ceba", kill_on_drop: false }`
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[INFO] running `Command { std: "docker" "rm" "-f" "67fdd3b74cd910d250dc841ee73176d8423c74144f611deadcacc10d0865ceba", kill_on_drop: false }`
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[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-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" "-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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+0611f7de057c584b8771102fde7aed6c70c71d3b" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
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[INFO] [stderr]    Compiling structmeta-derive v0.1.6
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[INFO] [stderr]     Checking ppv-lite86 v0.2.21
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[INFO] [stderr]     Checking rand_chacha v0.2.2
[INFO] [stderr]     Checking rand_chacha v0.3.1
[INFO] [stderr]     Checking rand v0.7.3
[INFO] [stderr]    Compiling parse-display-derive v0.5.5
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[INFO] [stderr]     Checking rand_distr v0.2.2
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[INFO] [stderr]     Checking mazes v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `RendererOps`
[INFO] [stdout]  --> src/render/renderers/anim.rs:3:43
[INFO] [stdout]   |
[INFO] [stdout] 3 | use crate::render::{Renderable, Renderer, RendererOps};
[INFO] [stdout]   |                                           ^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `RendererOps`
[INFO] [stdout]  --> src/render/renderers/anim.rs:3:43
[INFO] [stdout]   |
[INFO] [stdout] 3 | use crate::render::{Renderable, Renderer, RendererOps};
[INFO] [stdout]   |                                           ^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: struct `ImageSaveError` is never constructed
[INFO] [stdout]   --> src/error.rs:22:12
[INFO] [stdout]    |
[INFO] [stdout] 22 | pub struct ImageSaveError<'p>(&'p std::path::PathBuf);
[INFO] [stdout]    |            ^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this `pub` struct has private fields, no public constructor, and is not otherwise reachable through the external API, so consider providing a public constructor or removing it
[INFO] [stdout]    = note: `#[deny(unused_unconstructable_pub_struct)]` (part of `#[deny(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: struct `Block` is never constructed
[INFO] [stdout]   --> src/render/mod.rs:69:12
[INFO] [stdout]    |
[INFO] [stdout] 69 | pub struct Block {
[INFO] [stdout]    |            ^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this `pub` struct has private fields, no public constructor, and is not otherwise reachable through the external API, so consider providing a public constructor or removing it
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `id`, `x`, `y`, `sx`, and `sy` are never read
[INFO] [stdout]   --> src/render/mod.rs:70:5
[INFO] [stdout]    |
[INFO] [stdout] 69 | pub struct Block {
[INFO] [stdout]    |            ----- fields in this struct
[INFO] [stdout] 70 |     id: Index,
[INFO] [stdout]    |     ^^
[INFO] [stdout] 71 |     x: i32,
[INFO] [stdout]    |     ^
[INFO] [stdout] 72 |     y: i32,
[INFO] [stdout]    |     ^
[INFO] [stdout] 73 |     sx: u32,
[INFO] [stdout]    |     ^^
[INFO] [stdout] 74 |     sy: u32,
[INFO] [stdout]    |     ^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Block` has derived impls for the traits `Debug` and `Clone`, but these are intentionally ignored during dead code analysis
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `frame` is never read
[INFO] [stdout]   --> src/render/renderers/anim.rs:33:5
[INFO] [stdout]    |
[INFO] [stdout] 28 | pub struct Animation<'a, 'f, R: Renderer<'f>> {
[INFO] [stdout]    |            --------- field in this struct
[INFO] [stdout] ...
[INFO] [stdout] 33 |     frame: RefCell<usize>,
[INFO] [stdout]    |     ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]   --> src/maze.rs:28:13
[INFO] [stdout]    |
[INFO] [stdout] 28 |     fn link(&self, a: Index, b: Index) -> Result<(), CellLinkError> {
[INFO] [stdout]    |             ^^^^^ the lifetime is elided here        ^^^^^^^^^^^^^ the same lifetime is hidden 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] 28 |     fn link(&self, a: Index, b: Index) -> Result<(), CellLinkError<'_>> {
[INFO] [stdout]    |                                                                   ++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]   --> src/maze.rs:39:15
[INFO] [stdout]    |
[INFO] [stdout] 39 |     fn unlink(&self, a: Index, b: Index) -> Result<(), CellLinkError> {
[INFO] [stdout]    |               ^^^^^ the lifetime is elided here        ^^^^^^^^^^^^^ the same lifetime is hidden 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] 39 |     fn unlink(&self, a: Index, b: Index) -> Result<(), CellLinkError<'_>> {
[INFO] [stdout]    |                                                                     ++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]   --> src/maze.rs:52:13
[INFO] [stdout]    |
[INFO] [stdout] 52 |     fn iter(&self) -> Iter<Self, Ident>
[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] 52 |     fn iter(&self) -> Iter<'_, Self, Ident>
[INFO] [stdout]    |                            +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]   --> src/maze.rs:59:16
[INFO] [stdout]    |
[INFO] [stdout] 59 |     fn reverse(&self) -> Iter<Self, Rev>
[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] 59 |     fn reverse(&self) -> Iter<'_, Self, Rev>
[INFO] [stdout]    |                               +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]   --> src/maze/rect.rs:36:11
[INFO] [stdout]    |
[INFO] [stdout] 36 |     fn nw(&self) -> Iter<Self, Nw<RowMajor>>
[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] 36 |     fn nw(&self) -> Iter<'_, Self, Nw<RowMajor>>
[INFO] [stdout]    |                          +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]   --> src/maze/rect.rs:44:11
[INFO] [stdout]    |
[INFO] [stdout] 44 |     fn ne(&self) -> Iter<Self, Ne<RowMajor>>
[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] 44 |     fn ne(&self) -> Iter<'_, Self, Ne<RowMajor>>
[INFO] [stdout]    |                          +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]   --> src/maze/rect.rs:52:11
[INFO] [stdout]    |
[INFO] [stdout] 52 |     fn se(&self) -> Iter<Self, Se<RowMajor>>
[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] 52 |     fn se(&self) -> Iter<'_, Self, Se<RowMajor>>
[INFO] [stdout]    |                          +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]   --> src/maze/rect.rs:60:11
[INFO] [stdout]    |
[INFO] [stdout] 60 |     fn sw(&self) -> Iter<Self, Sw<RowMajor>>
[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] 60 |     fn sw(&self) -> Iter<'_, Self, Sw<RowMajor>>
[INFO] [stdout]    |                          +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]    --> src/maze/rect.rs:110:22
[INFO] [stdout]     |
[INFO] [stdout] 110 |     fn link_neighbor(&self, id: Index, d: &Cardinal) -> Result<(), NotNeighborsError<Cardinal>> {
[INFO] [stdout]     |                      ^^^^^ the lifetime is elided here             ^^^^^^^^^^^^^^^^^^^^^^^^^^^ the same lifetime is hidden 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] 110 |     fn link_neighbor(&self, id: Index, d: &Cardinal) -> Result<(), NotNeighborsError<'_, Cardinal>> {
[INFO] [stdout]     |                                                                                      +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]    --> src/maze/rect.rs:122:24
[INFO] [stdout]     |
[INFO] [stdout] 122 |     fn unlink_neighbor(&self, id: Index, d: &Cardinal) -> Result<(), NotNeighborsError<Cardinal>> {
[INFO] [stdout]     |                        ^^^^^ the lifetime is elided here             ^^^^^^^^^^^^^^^^^^^^^^^^^^^ the same lifetime is hidden 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] 122 |     fn unlink_neighbor(&self, id: Index, d: &Cardinal) -> Result<(), NotNeighborsError<'_, Cardinal>> {
[INFO] [stdout]     |                                                                                        +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: bounds on generic parameters in type aliases are not enforced
[INFO] [stdout]  --> src/render/renderers/custom.rs:6:24
[INFO] [stdout]   |
[INFO] [stdout] 6 | pub type CustomFunc<R: Renderable> =
[INFO] [stdout]   |                        ^^^^^^^^^^ will not be checked at usage sites of the type alias
[INFO] [stdout]   |
[INFO] [stdout]   = note: this is a known limitation of the type checker that may be lifted in a future edition.
[INFO] [stdout]           see issue #112792 <https://github.com/rust-lang/rust/issues/112792> for more information
[INFO] [stdout]   = help: add `#![feature(lazy_type_alias)]` to the crate attributes to enable the desired semantics
[INFO] [stdout]   = note: `#[warn(type_alias_bounds)]` on by default
[INFO] [stdout] help: remove this bound
[INFO] [stdout]   |
[INFO] [stdout] 6 - pub type CustomFunc<R: Renderable> =
[INFO] [stdout] 6 + pub type CustomFunc<R> =
[INFO] [stdout]   |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]   --> src/util/path.rs:33:17
[INFO] [stdout]    |
[INFO] [stdout] 33 |     pub fn iter(&self) -> std::slice::Iter<Index> {
[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] 33 |     pub fn iter(&self) -> std::slice::Iter<'_, Index> {
[INFO] [stdout]    |                                            +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: struct `ImageSaveError` is never constructed
[INFO] [stdout]   --> src/error.rs:22:12
[INFO] [stdout]    |
[INFO] [stdout] 22 | pub struct ImageSaveError<'p>(&'p std::path::PathBuf);
[INFO] [stdout]    |            ^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this `pub` struct has private fields, no public constructor, and is not otherwise reachable through the external API, so consider providing a public constructor or removing it
[INFO] [stdout]    = note: `#[deny(unused_unconstructable_pub_struct)]` (part of `#[deny(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: struct `Block` is never constructed
[INFO] [stdout]   --> src/render/mod.rs:69:12
[INFO] [stdout]    |
[INFO] [stdout] 69 | pub struct Block {
[INFO] [stdout]    |            ^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this `pub` struct has private fields, no public constructor, and is not otherwise reachable through the external API, so consider providing a public constructor or removing it
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `id`, `x`, `y`, `sx`, and `sy` are never read
[INFO] [stdout]   --> src/render/mod.rs:70:5
[INFO] [stdout]    |
[INFO] [stdout] 69 | pub struct Block {
[INFO] [stdout]    |            ----- fields in this struct
[INFO] [stdout] 70 |     id: Index,
[INFO] [stdout]    |     ^^
[INFO] [stdout] 71 |     x: i32,
[INFO] [stdout]    |     ^
[INFO] [stdout] 72 |     y: i32,
[INFO] [stdout]    |     ^
[INFO] [stdout] 73 |     sx: u32,
[INFO] [stdout]    |     ^^
[INFO] [stdout] 74 |     sy: u32,
[INFO] [stdout]    |     ^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Block` has derived impls for the traits `Debug` and `Clone`, but these are intentionally ignored during dead code analysis
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `frame` is never read
[INFO] [stdout]   --> src/render/renderers/anim.rs:33:5
[INFO] [stdout]    |
[INFO] [stdout] 28 | pub struct Animation<'a, 'f, R: Renderer<'f>> {
[INFO] [stdout]    |            --------- field in this struct
[INFO] [stdout] ...
[INFO] [stdout] 33 |     frame: RefCell<usize>,
[INFO] [stdout]    |     ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]   --> src/maze.rs:28:13
[INFO] [stdout]    |
[INFO] [stdout] 28 |     fn link(&self, a: Index, b: Index) -> Result<(), CellLinkError> {
[INFO] [stdout]    |             ^^^^^ the lifetime is elided here        ^^^^^^^^^^^^^ the same lifetime is hidden 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] 28 |     fn link(&self, a: Index, b: Index) -> Result<(), CellLinkError<'_>> {
[INFO] [stdout]    |                                                                   ++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]   --> src/maze.rs:39:15
[INFO] [stdout]    |
[INFO] [stdout] 39 |     fn unlink(&self, a: Index, b: Index) -> Result<(), CellLinkError> {
[INFO] [stdout]    |               ^^^^^ the lifetime is elided here        ^^^^^^^^^^^^^ the same lifetime is hidden 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] 39 |     fn unlink(&self, a: Index, b: Index) -> Result<(), CellLinkError<'_>> {
[INFO] [stdout]    |                                                                     ++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]   --> src/maze.rs:52:13
[INFO] [stdout]    |
[INFO] [stdout] 52 |     fn iter(&self) -> Iter<Self, Ident>
[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] 52 |     fn iter(&self) -> Iter<'_, Self, Ident>
[INFO] [stdout]    |                            +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]   --> src/maze.rs:59:16
[INFO] [stdout]    |
[INFO] [stdout] 59 |     fn reverse(&self) -> Iter<Self, Rev>
[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] 59 |     fn reverse(&self) -> Iter<'_, Self, Rev>
[INFO] [stdout]    |                               +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]   --> src/maze/rect.rs:36:11
[INFO] [stdout]    |
[INFO] [stdout] 36 |     fn nw(&self) -> Iter<Self, Nw<RowMajor>>
[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] 36 |     fn nw(&self) -> Iter<'_, Self, Nw<RowMajor>>
[INFO] [stdout]    |                          +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]   --> src/maze/rect.rs:44:11
[INFO] [stdout]    |
[INFO] [stdout] 44 |     fn ne(&self) -> Iter<Self, Ne<RowMajor>>
[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] 44 |     fn ne(&self) -> Iter<'_, Self, Ne<RowMajor>>
[INFO] [stdout]    |                          +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]   --> src/maze/rect.rs:52:11
[INFO] [stdout]    |
[INFO] [stdout] 52 |     fn se(&self) -> Iter<Self, Se<RowMajor>>
[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] 52 |     fn se(&self) -> Iter<'_, Self, Se<RowMajor>>
[INFO] [stdout]    |                          +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]   --> src/maze/rect.rs:60:11
[INFO] [stdout]    |
[INFO] [stdout] 60 |     fn sw(&self) -> Iter<Self, Sw<RowMajor>>
[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] 60 |     fn sw(&self) -> Iter<'_, Self, Sw<RowMajor>>
[INFO] [stdout]    |                          +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]    --> src/maze/rect.rs:110:22
[INFO] [stdout]     |
[INFO] [stdout] 110 |     fn link_neighbor(&self, id: Index, d: &Cardinal) -> Result<(), NotNeighborsError<Cardinal>> {
[INFO] [stdout]     |                      ^^^^^ the lifetime is elided here             ^^^^^^^^^^^^^^^^^^^^^^^^^^^ the same lifetime is hidden 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] 110 |     fn link_neighbor(&self, id: Index, d: &Cardinal) -> Result<(), NotNeighborsError<'_, Cardinal>> {
[INFO] [stdout]     |                                                                                      +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]    --> src/maze/rect.rs:122:24
[INFO] [stdout]     |
[INFO] [stdout] 122 |     fn unlink_neighbor(&self, id: Index, d: &Cardinal) -> Result<(), NotNeighborsError<Cardinal>> {
[INFO] [stdout]     |                        ^^^^^ the lifetime is elided here             ^^^^^^^^^^^^^^^^^^^^^^^^^^^ the same lifetime is hidden 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] 122 |     fn unlink_neighbor(&self, id: Index, d: &Cardinal) -> Result<(), NotNeighborsError<'_, Cardinal>> {
[INFO] [stdout]     |                                                                                        +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: bounds on generic parameters in type aliases are not enforced
[INFO] [stdout]  --> src/render/renderers/custom.rs:6:24
[INFO] [stdout]   |
[INFO] [stdout] 6 | pub type CustomFunc<R: Renderable> =
[INFO] [stdout]   |                        ^^^^^^^^^^ will not be checked at usage sites of the type alias
[INFO] [stdout]   |
[INFO] [stdout]   = note: this is a known limitation of the type checker that may be lifted in a future edition.
[INFO] [stdout]           see issue #112792 <https://github.com/rust-lang/rust/issues/112792> for more information
[INFO] [stdout]   = help: add `#![feature(lazy_type_alias)]` to the crate attributes to enable the desired semantics
[INFO] [stdout]   = note: `#[warn(type_alias_bounds)]` on by default
[INFO] [stdout] help: remove this bound
[INFO] [stdout]   |
[INFO] [stdout] 6 - pub type CustomFunc<R: Renderable> =
[INFO] [stdout] 6 + pub type CustomFunc<R> =
[INFO] [stdout]   |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `mazes` (lib) due to 2 previous errors; 15 warnings emitted
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]   --> src/util/path.rs:33:17
[INFO] [stdout]    |
[INFO] [stdout] 33 |     pub fn iter(&self) -> std::slice::Iter<Index> {
[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] 33 |     pub fn iter(&self) -> std::slice::Iter<'_, Index> {
[INFO] [stdout]    |                                            +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `mazes` (lib test) due to 2 previous errors; 15 warnings emitted
[INFO] running `Command { std: "docker" "inspect" "8d37be8fa1195257e9a43ae166977f0057faad148c69e61b7fb430d1831c1594", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "8d37be8fa1195257e9a43ae166977f0057faad148c69e61b7fb430d1831c1594", kill_on_drop: false }`
[INFO] [stdout] 8d37be8fa1195257e9a43ae166977f0057faad148c69e61b7fb430d1831c1594
