[INFO] cloning repository https://github.com/pastorenue/learn_rust_with_me
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/pastorenue/learn_rust_with_me" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fpastorenue%2Flearn_rust_with_me", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fpastorenue%2Flearn_rust_with_me'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 4d32e2420a9e4f01a3d01b483a436d9cfdc0d29f
[INFO] checking pastorenue/learn_rust_with_me against master#040e2f8b9ff2d76fbe2146d6003e297ed4532088 for pr-143619
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fpastorenue%2Flearn_rust_with_me" "/workspace/builds/worker-3-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-3-tc1/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/pastorenue/learn_rust_with_me
[INFO] finished tweaking git repo https://github.com/pastorenue/learn_rust_with_me
[INFO] tweaked toml for git repo https://github.com/pastorenue/learn_rust_with_me written to /workspace/builds/worker-3-tc1/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/pastorenue/learn_rust_with_me on toolchain 040e2f8b9ff2d76fbe2146d6003e297ed4532088
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+040e2f8b9ff2d76fbe2146d6003e297ed4532088" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/pastorenue/learn_rust_with_me 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" "+040e2f8b9ff2d76fbe2146d6003e297ed4532088" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-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:e8955075918b6d00525c617f7c34ee2595c70db70b3cf844dc875e4d3604499b" "/opt/rustwide/cargo-home/bin/cargo" "+040e2f8b9ff2d76fbe2146d6003e297ed4532088" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] d85af64ac7f941f5f2e1d57a13a10b05d43a46e77295e74a00923413ce2fbced
[INFO] running `Command { std: "docker" "start" "-a" "d85af64ac7f941f5f2e1d57a13a10b05d43a46e77295e74a00923413ce2fbced", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "d85af64ac7f941f5f2e1d57a13a10b05d43a46e77295e74a00923413ce2fbced", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d85af64ac7f941f5f2e1d57a13a10b05d43a46e77295e74a00923413ce2fbced", kill_on_drop: false }`
[INFO] [stdout] d85af64ac7f941f5f2e1d57a13a10b05d43a46e77295e74a00923413ce2fbced
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-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:e8955075918b6d00525c617f7c34ee2595c70db70b3cf844dc875e4d3604499b" "/opt/rustwide/cargo-home/bin/cargo" "+040e2f8b9ff2d76fbe2146d6003e297ed4532088" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 06734b1945c7c7257a85e5adbe968bd02438cd25a75dc95fdccb8277f753dc3d
[INFO] running `Command { std: "docker" "start" "-a" "06734b1945c7c7257a85e5adbe968bd02438cd25a75dc95fdccb8277f753dc3d", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.86
[INFO] [stderr]    Compiling unicode-ident v1.0.12
[INFO] [stderr]    Compiling autocfg v1.3.0
[INFO] [stderr]    Compiling serde v1.0.207
[INFO] [stderr]    Compiling serde_json v1.0.125
[INFO] [stderr]     Checking itoa v1.0.11
[INFO] [stderr]     Checking ryu v1.0.18
[INFO] [stderr]     Checking iana-time-zone v0.1.60
[INFO] [stderr]     Checking memchr v2.7.4
[INFO] [stderr]    Compiling num-traits v0.2.19
[INFO] [stderr]    Compiling quote v1.0.36
[INFO] [stderr]    Compiling syn v2.0.74
[INFO] [stderr]     Checking chrono v0.4.38
[INFO] [stderr]    Compiling serde_derive v1.0.207
[INFO] [stderr]     Checking learn_rust_with_me v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: function `run_hashmap` is never used
[INFO] [stdout]  --> src/collectionz/using_hashmap.rs:4:8
[INFO] [stdout]   |
[INFO] [stdout] 4 | pub fn run_hashmap() {
[INFO] [stdout]   |        ^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `run_strings` is never used
[INFO] [stdout]  --> src/collectionz/using_strings.rs:1:8
[INFO] [stdout]   |
[INFO] [stdout] 1 | pub fn run_strings() {
[INFO] [stdout]   |        ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `creating_new_string` is never used
[INFO] [stdout]  --> src/collectionz/using_strings.rs:5:4
[INFO] [stdout]   |
[INFO] [stdout] 5 | fn creating_new_string() {
[INFO] [stdout]   |    ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait `Growable` is never used
[INFO] [stdout]  --> src/taxonomy/plant/litter.rs:1:11
[INFO] [stdout]   |
[INFO] [stdout] 1 | pub trait Growable {
[INFO] [stdout]   |           ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `PlantInfo` is never constructed
[INFO] [stdout]  --> src/taxonomy/plant/litter.rs:6:12
[INFO] [stdout]   |
[INFO] [stdout] 6 | pub struct PlantInfo {
[INFO] [stdout]   |            ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Herb` is never constructed
[INFO] [stdout]   --> src/taxonomy/plant/litter.rs:16:12
[INFO] [stdout]    |
[INFO] [stdout] 16 | pub struct Herb {
[INFO] [stdout]    |            ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Shrub` is never constructed
[INFO] [stdout]   --> src/taxonomy/plant/litter.rs:21:12
[INFO] [stdout]    |
[INFO] [stdout] 21 | pub struct Shrub {
[INFO] [stdout]    |            ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Tree` is never constructed
[INFO] [stdout]   --> src/taxonomy/plant/litter.rs:26:12
[INFO] [stdout]    |
[INFO] [stdout] 26 | pub struct Tree {
[INFO] [stdout]    |            ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Climber` is never constructed
[INFO] [stdout]   --> src/taxonomy/plant/litter.rs:31:12
[INFO] [stdout]    |
[INFO] [stdout] 31 | pub struct Climber {
[INFO] [stdout]    |            ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Creeper` is never constructed
[INFO] [stdout]   --> src/taxonomy/plant/litter.rs:36:12
[INFO] [stdout]    |
[INFO] [stdout] 36 | pub struct Creeper {
[INFO] [stdout]    |            ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum `PlantClassification` is never used
[INFO] [stdout]   --> src/taxonomy/plant/litter.rs:41:10
[INFO] [stdout]    |
[INFO] [stdout] 41 | pub enum PlantClassification {
[INFO] [stdout]    |          ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `grow` is never used
[INFO] [stdout]   --> src/taxonomy/plant/litter.rs:91:8
[INFO] [stdout]    |
[INFO] [stdout] 91 | pub fn grow(plant: Box<dyn Growable>) {
[INFO] [stdout]    |        ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `get_native_date` is never used
[INFO] [stdout]  --> src/dt/date.rs:7:8
[INFO] [stdout]   |
[INFO] [stdout] 7 | pub fn get_native_date() -> NaiveDateTime {
[INFO] [stdout]   |        ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `working_with_mutex` is never used
[INFO] [stdout]   --> src/dt/date.rs:20:8
[INFO] [stdout]    |
[INFO] [stdout] 20 | pub fn working_with_mutex() {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `using_sized` is never used
[INFO] [stdout]   --> src/dt/date.rs:44:4
[INFO] [stdout]    |
[INFO] [stdout] 44 | fn using_sized<T: Sized>(x: T) -> T
[INFO] [stdout]    |    ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `LocalGuardian` is never constructed
[INFO] [stdout]   --> src/dt/date.rs:50:8
[INFO] [stdout]    |
[INFO] [stdout] 50 | struct LocalGuardian<T> {
[INFO] [stdout]    |        ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function `new` is never used
[INFO] [stdout]   --> src/dt/date.rs:64:8
[INFO] [stdout]    |
[INFO] [stdout] 63 | impl<T> LocalGuardian<T> {
[INFO] [stdout]    | ------------------------ associated function in this implementation
[INFO] [stdout] 64 |     fn new(data: T) -> Self {
[INFO] [stdout]    |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `test_custom_box` is never used
[INFO] [stdout]   --> src/dt/date.rs:72:4
[INFO] [stdout]    |
[INFO] [stdout] 72 | fn test_custom_box() -> LocalGuardian<i32> {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `UserAge` is never constructed
[INFO] [stdout]  --> src/traits.rs:4:19
[INFO] [stdout]   |
[INFO] [stdout] 4 | pub(crate) struct UserAge {
[INFO] [stdout]   |                   ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `try_from` is never used
[INFO] [stdout]   --> src/traits.rs:14:15
[INFO] [stdout]    |
[INFO] [stdout] 14 | pub(crate) fn try_from(x: i32) -> Option<UserAge> {
[INFO] [stdout]    |               ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `try_into` is never used
[INFO] [stdout]   --> src/traits.rs:20:15
[INFO] [stdout]    |
[INFO] [stdout] 20 | pub(crate) fn try_into(x: i32) -> Option<UserAge> {
[INFO] [stdout]    |               ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `progress` is never used
[INFO] [stdout]  --> src/tdd.rs:5:4
[INFO] [stdout]   |
[INFO] [stdout] 5 | fn progress<Iter>(iter: Iter, f: fn(Iter::Item))
[INFO] [stdout]   |    ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `run_hashmap` is never used
[INFO] [stdout]  --> src/collectionz/using_hashmap.rs:4:8
[INFO] [stdout]   |
[INFO] [stdout] 4 | pub fn run_hashmap() {
[INFO] [stdout]   |        ^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `run_strings` is never used
[INFO] [stdout]  --> src/collectionz/using_strings.rs:1:8
[INFO] [stdout]   |
[INFO] [stdout] 1 | pub fn run_strings() {
[INFO] [stdout]   |        ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `creating_new_string` is never used
[INFO] [stdout]  --> src/collectionz/using_strings.rs:5:4
[INFO] [stdout]   |
[INFO] [stdout] 5 | fn creating_new_string() {
[INFO] [stdout]   |    ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait `Growable` is never used
[INFO] [stdout]  --> src/taxonomy/plant/litter.rs:1:11
[INFO] [stdout]   |
[INFO] [stdout] 1 | pub trait Growable {
[INFO] [stdout]   |           ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `PlantInfo` is never constructed
[INFO] [stdout]  --> src/taxonomy/plant/litter.rs:6:12
[INFO] [stdout]   |
[INFO] [stdout] 6 | pub struct PlantInfo {
[INFO] [stdout]   |            ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Herb` is never constructed
[INFO] [stdout]   --> src/taxonomy/plant/litter.rs:16:12
[INFO] [stdout]    |
[INFO] [stdout] 16 | pub struct Herb {
[INFO] [stdout]    |            ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Shrub` is never constructed
[INFO] [stdout]   --> src/taxonomy/plant/litter.rs:21:12
[INFO] [stdout]    |
[INFO] [stdout] 21 | pub struct Shrub {
[INFO] [stdout]    |            ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Tree` is never constructed
[INFO] [stdout]   --> src/taxonomy/plant/litter.rs:26:12
[INFO] [stdout]    |
[INFO] [stdout] 26 | pub struct Tree {
[INFO] [stdout]    |            ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Climber` is never constructed
[INFO] [stdout]   --> src/taxonomy/plant/litter.rs:31:12
[INFO] [stdout]    |
[INFO] [stdout] 31 | pub struct Climber {
[INFO] [stdout]    |            ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Creeper` is never constructed
[INFO] [stdout]   --> src/taxonomy/plant/litter.rs:36:12
[INFO] [stdout]    |
[INFO] [stdout] 36 | pub struct Creeper {
[INFO] [stdout]    |            ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum `PlantClassification` is never used
[INFO] [stdout]   --> src/taxonomy/plant/litter.rs:41:10
[INFO] [stdout]    |
[INFO] [stdout] 41 | pub enum PlantClassification {
[INFO] [stdout]    |          ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `grow` is never used
[INFO] [stdout]   --> src/taxonomy/plant/litter.rs:91:8
[INFO] [stdout]    |
[INFO] [stdout] 91 | pub fn grow(plant: Box<dyn Growable>) {
[INFO] [stdout]    |        ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `get_native_date` is never used
[INFO] [stdout]  --> src/dt/date.rs:7:8
[INFO] [stdout]   |
[INFO] [stdout] 7 | pub fn get_native_date() -> NaiveDateTime {
[INFO] [stdout]   |        ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `working_with_mutex` is never used
[INFO] [stdout]   --> src/dt/date.rs:20:8
[INFO] [stdout]    |
[INFO] [stdout] 20 | pub fn working_with_mutex() {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `using_sized` is never used
[INFO] [stdout]   --> src/dt/date.rs:44:4
[INFO] [stdout]    |
[INFO] [stdout] 44 | fn using_sized<T: Sized>(x: T) -> T
[INFO] [stdout]    |    ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `LocalGuardian` is never constructed
[INFO] [stdout]   --> src/dt/date.rs:50:8
[INFO] [stdout]    |
[INFO] [stdout] 50 | struct LocalGuardian<T> {
[INFO] [stdout]    |        ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function `new` is never used
[INFO] [stdout]   --> src/dt/date.rs:64:8
[INFO] [stdout]    |
[INFO] [stdout] 63 | impl<T> LocalGuardian<T> {
[INFO] [stdout]    | ------------------------ associated function in this implementation
[INFO] [stdout] 64 |     fn new(data: T) -> Self {
[INFO] [stdout]    |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `test_custom_box` is never used
[INFO] [stdout]   --> src/dt/date.rs:72:4
[INFO] [stdout]    |
[INFO] [stdout] 72 | fn test_custom_box() -> LocalGuardian<i32> {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `UserAge` is never constructed
[INFO] [stdout]  --> src/traits.rs:4:19
[INFO] [stdout]   |
[INFO] [stdout] 4 | pub(crate) struct UserAge {
[INFO] [stdout]   |                   ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `try_from` is never used
[INFO] [stdout]   --> src/traits.rs:14:15
[INFO] [stdout]    |
[INFO] [stdout] 14 | pub(crate) fn try_from(x: i32) -> Option<UserAge> {
[INFO] [stdout]    |               ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `try_into` is never used
[INFO] [stdout]   --> src/traits.rs:20:15
[INFO] [stdout]    |
[INFO] [stdout] 20 | pub(crate) fn try_into(x: i32) -> Option<UserAge> {
[INFO] [stdout]    |               ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `progress` is never used
[INFO] [stdout]  --> src/tdd.rs:5:4
[INFO] [stdout]   |
[INFO] [stdout] 5 | fn progress<Iter>(iter: Iter, f: fn(Iter::Item))
[INFO] [stdout]   |    ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 13.49s
[INFO] running `Command { std: "docker" "inspect" "06734b1945c7c7257a85e5adbe968bd02438cd25a75dc95fdccb8277f753dc3d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "06734b1945c7c7257a85e5adbe968bd02438cd25a75dc95fdccb8277f753dc3d", kill_on_drop: false }`
[INFO] [stdout] 06734b1945c7c7257a85e5adbe968bd02438cd25a75dc95fdccb8277f753dc3d