[INFO] updating cached repository https://github.com/Delorus/rust_learning
[INFO] running `"git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "-c" "remote.origin.fetch=refs/heads/*:refs/heads/*" "fetch" "origin" "--force" "--prune"`
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 85e9ac89dac5dca12156acf98619a6a7add91951
[INFO] checking Delorus/rust_learning against try#e2aab98dd8975a0990f9fbb79b3ea4b40559a184 for pr-72493
[INFO] running `"git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FDelorus%2Frust_learning" "/workspace/builds/worker-8/source"`
[INFO] [stderr] Cloning into '/workspace/builds/worker-8/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/Delorus/rust_learning on toolchain e2aab98dd8975a0990f9fbb79b3ea4b40559a184
[INFO] running `"/workspace/cargo-home/bin/cargo" "+e2aab98dd8975a0990f9fbb79b3ea4b40559a184" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking git repo https://github.com/Delorus/rust_learning
[INFO] finished tweaking git repo https://github.com/Delorus/rust_learning
[INFO] tweaked toml for git repo https://github.com/Delorus/rust_learning written to /workspace/builds/worker-8/source/Cargo.toml
[INFO] crate git repo https://github.com/Delorus/rust_learning already has a lockfile, it will not be regenerated
[INFO] running `"/workspace/cargo-home/bin/cargo" "+e2aab98dd8975a0990f9fbb79b3ea4b40559a184" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/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" "MAP_USER_ID=0" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--network" "none" "rustops/crates-build-env" "/opt/rustwide/cargo-home/bin/cargo" "+e2aab98dd8975a0990f9fbb79b3ea4b40559a184" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 96721a39618324c5046bd15f58c1910645603beb71f2249f91154144790a0f69
[INFO] running `"docker" "start" "-a" "96721a39618324c5046bd15f58c1910645603beb71f2249f91154144790a0f69"`
[INFO] [stderr] sudo: setrlimit(RLIMIT_CORE): Operation not permitted
[INFO] [stderr]     Checking learning v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr] error[E0308]: mismatched types
[INFO] [stderr]   --> src/bin/state_pattern.rs:47:41
[INFO] [stderr]    |
[INFO] [stderr] 47 |         pub fn request_preview(self) -> PendingReviewPost {
[INFO] [stderr]    |                ---------------          ^^^^^^^^^^^^^^^^^ expected struct `blog::PendingReviewPost`, found `()`
[INFO] [stderr]    |                |
[INFO] [stderr]    |                implicitly returns `()` as its body has no tail or `return` expression
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to previous error
[INFO] [stderr] 
[INFO] [stderr] error[E0308]: mismatched types
[INFO] [stderr]   --> src/bin/state_pattern.rs:47:41
[INFO] [stderr]    |
[INFO] [stderr] 47 |         pub fn request_preview(self) -> PendingReviewPost {
[INFO] [stderr]    |                ---------------          ^^^^^^^^^^^^^^^^^ expected struct `blog::PendingReviewPost`, found `()`
[INFO] [stderr]    |                |
[INFO] [stderr]    |                implicitly returns `()` as its body has no tail or `return` expression
[INFO] [stderr] 
[INFO] [stderr] For more information about this error, try `rustc --explain E0308`.
[INFO] [stderr] error: aborting due to previous error
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `square`
[INFO] [stderr]   --> src/bin/methods.rs:12:8
[INFO] [stderr]    |
[INFO] [stderr] 12 |     fn square(size: u32) -> Rectangle {
[INFO] [stderr]    |        ^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `can_hold`
[INFO] [stderr]   --> src/bin/methods.rs:34:8
[INFO] [stderr]    |
[INFO] [stderr] 34 |     fn can_hold(&self, other: &Rectangle) -> bool {
[INFO] [stderr]    |        ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] For more information about this error, try `rustc --explain E0308`.
[INFO] [stderr] warning: function is never used: `return_value`
[INFO] [stderr]  --> src/bin/functions.rs:9:4
[INFO] [stderr]   |
[INFO] [stderr] 9 | fn return_value() -> i32 {
[INFO] [stderr]   |    ^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `not_return_value`
[INFO] [stderr]   --> src/bin/functions.rs:13:4
[INFO] [stderr]    |
[INFO] [stderr] 13 | fn not_return_value() -> i32 {
[INFO] [stderr]    |    ^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `total`
[INFO] [stderr]   --> src/bin/iterators.rs:10:9
[INFO] [stderr]    |
[INFO] [stderr] 10 |     let total: i32 = v_iter.sum();
[INFO] [stderr]    |         ^^^^^ help: if this is intentional, prefix it with an underscore: `_total`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `total`
[INFO] [stderr]   --> src/bin/iterators.rs:10:9
[INFO] [stderr]    |
[INFO] [stderr] 10 |     let total: i32 = v_iter.sum();
[INFO] [stderr]    |         ^^^^^ help: if this is intentional, prefix it with an underscore: `_total`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] error: could not compile `learning`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] warning: function is never used: `iter_terminated`
[INFO] [stderr]  --> src/bin/iterators.rs:5:4
[INFO] [stderr]   |
[INFO] [stderr] 5 | fn iter_terminated() {
[INFO] [stderr]   |    ^^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `iter_adaptors`
[INFO] [stderr]   --> src/bin/iterators.rs:13:4
[INFO] [stderr]    |
[INFO] [stderr] 13 | fn iter_adaptors() {
[INFO] [stderr]    |    ^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: 2 warnings emitted
[INFO] [stderr] 
[INFO] [stderr] warning: 2 warnings emitted
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `return_value`
[INFO] [stderr]  --> src/bin/functions.rs:9:4
[INFO] [stderr]   |
[INFO] [stderr] 9 | fn return_value() -> i32 {
[INFO] [stderr]   |    ^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `not_return_value`
[INFO] [stderr]   --> src/bin/functions.rs:13:4
[INFO] [stderr]    |
[INFO] [stderr] 13 | fn not_return_value() -> i32 {
[INFO] [stderr]    |    ^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `iter_terminated`
[INFO] [stderr]  --> src/bin/iterators.rs:5:4
[INFO] [stderr]   |
[INFO] [stderr] 5 | fn iter_terminated() {
[INFO] [stderr]   |    ^^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `int`
[INFO] [stderr]   --> src/bin/generics.rs:39:9
[INFO] [stderr]    |
[INFO] [stderr] 39 |     let int = Point {
[INFO] [stderr]    |         ^^^ help: if this is intentional, prefix it with an underscore: `_int`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `float`
[INFO] [stderr]   --> src/bin/generics.rs:43:9
[INFO] [stderr]    |
[INFO] [stderr] 43 |     let float = Point {
[INFO] [stderr]    |         ^^^^^ help: if this is intentional, prefix it with an underscore: `_float`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `t`
[INFO] [stderr]   --> src/bin/generics.rs:59:20
[INFO] [stderr]    |
[INFO] [stderr] 59 | fn some_func<T, U>(t: T, u: U) -> i32
[INFO] [stderr]    |                    ^ help: if this is intentional, prefix it with an underscore: `_t`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `u`
[INFO] [stderr]   --> src/bin/generics.rs:59:26
[INFO] [stderr]    |
[INFO] [stderr] 59 | fn some_func<T, U>(t: T, u: U) -> i32
[INFO] [stderr]    |                          ^ help: if this is intentional, prefix it with an underscore: `_u`
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `largest`
[INFO] [stderr]  --> src/bin/generics.rs:8:4
[INFO] [stderr]   |
[INFO] [stderr] 8 | fn largest<T: PartialOrd + Copy>(list: &[T]) -> T {
[INFO] [stderr]   |    ^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `x`
[INFO] [stderr]   --> src/bin/generics.rs:27:8
[INFO] [stderr]    |
[INFO] [stderr] 27 |     fn x(&self) -> &T {
[INFO] [stderr]    |        ^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `create_generic_point`
[INFO] [stderr]   --> src/bin/generics.rs:38:4
[INFO] [stderr]    |
[INFO] [stderr] 38 | fn create_generic_point() {
[INFO] [stderr]    |    ^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `some_func`
[INFO] [stderr]   --> src/bin/generics.rs:59:4
[INFO] [stderr]    |
[INFO] [stderr] 59 | fn some_func<T, U>(t: T, u: U) -> i32
[INFO] [stderr]    |    ^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `iter_adaptors`
[INFO] [stderr]   --> src/bin/iterators.rs:13:4
[INFO] [stderr]    |
[INFO] [stderr] 13 | fn iter_adaptors() {
[INFO] [stderr]    |    ^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: 8 warnings emitted
[INFO] [stderr] 
[INFO] [stderr] warning: 2 warnings emitted
[INFO] [stderr] 
[INFO] [stderr] warning: 3 warnings emitted
[INFO] [stderr] 
[INFO] [stderr] warning: 3 warnings emitted
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/bin/collections.rs:17:9
[INFO] [stderr]    |
[INFO] [stderr] 17 |     let mut v = vec![1, 2, 3, 4, 5];
[INFO] [stderr]    |         ----^
[INFO] [stderr]    |         |
[INFO] [stderr]    |         help: remove this `mut`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_mut)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: field is never read: `value`
[INFO] [stderr]   --> src/bin/tests.rs:61:5
[INFO] [stderr]    |
[INFO] [stderr] 61 |     value: u32,
[INFO] [stderr]    |     ^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `z`
[INFO] [stderr]   --> src/bin/data_types.rs:31:9
[INFO] [stderr]    |
[INFO] [stderr] 31 |     let z = x as u32 + y;
[INFO] [stderr]    |         ^ help: if this is intentional, prefix it with an underscore: `_z`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `create_vector`
[INFO] [stderr]  --> src/bin/collections.rs:7:4
[INFO] [stderr]   |
[INFO] [stderr] 7 | fn create_vector() {
[INFO] [stderr]   |    ^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `get_value`
[INFO] [stderr]   --> src/bin/collections.rs:16:4
[INFO] [stderr]    |
[INFO] [stderr] 16 | fn get_value() {
[INFO] [stderr]    |    ^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `override_plus`
[INFO] [stderr]   --> src/bin/adv_traits.rs:24:4
[INFO] [stderr]    |
[INFO] [stderr] 24 | fn override_plus() {
[INFO] [stderr]    |    ^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `create_hash_map`
[INFO] [stderr]   --> src/bin/collections.rs:24:4
[INFO] [stderr]    |
[INFO] [stderr] 24 | fn create_hash_map() {
[INFO] [stderr]    |    ^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `get_stats`
[INFO] [stderr]   --> src/bin/collections.rs:31:4
[INFO] [stderr]    |
[INFO] [stderr] 31 | fn get_stats() {
[INFO] [stderr]    |    ^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `stats`
[INFO] [stderr]   --> src/bin/collections.rs:38:4
[INFO] [stderr]    |
[INFO] [stderr] 38 | fn stats(v: &Vec<i32>) -> (f64, i32, i32) {
[INFO] [stderr]    |    ^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `fly`
[INFO] [stderr]   --> src/bin/adv_traits.rs:67:8
[INFO] [stderr]    |
[INFO] [stderr] 67 |     fn fly(&self) {
[INFO] [stderr]    |        ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `several_realisation`
[INFO] [stderr]   --> src/bin/adv_traits.rs:72:4
[INFO] [stderr]    |
[INFO] [stderr] 72 | fn several_realisation() {
[INFO] [stderr]    |    ^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `Dog`
[INFO] [stderr]   --> src/bin/adv_traits.rs:83:8
[INFO] [stderr]    |
[INFO] [stderr] 83 | struct Dog;
[INFO] [stderr]    |        ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `baby_name`
[INFO] [stderr]   --> src/bin/adv_traits.rs:86:8
[INFO] [stderr]    |
[INFO] [stderr] 86 |     fn baby_name() -> String {
[INFO] [stderr]    |        ^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `several_static_realisation`
[INFO] [stderr]   --> src/bin/adv_traits.rs:97:4
[INFO] [stderr]    |
[INFO] [stderr] 97 | fn several_static_realisation() {
[INFO] [stderr]    |    ^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `newtype`
[INFO] [stderr]    --> src/bin/adv_traits.rs:142:4
[INFO] [stderr]     |
[INFO] [stderr] 142 | fn newtype() {
[INFO] [stderr]     |    ^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: 1 warning emitted
[INFO] [stderr] 
[INFO] [stderr] warning: 6 warnings emitted
[INFO] [stderr] 
[INFO] [stderr] warning: 7 warnings emitted
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `cast_to_unsigned`
[INFO] [stderr]  --> src/bin/data_types.rs:5:4
[INFO] [stderr]   |
[INFO] [stderr] 5 | fn cast_to_unsigned() {
[INFO] [stderr]   |    ^^^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `representation_of_number`
[INFO] [stderr]   --> src/bin/data_types.rs:10:4
[INFO] [stderr]    |
[INFO] [stderr] 10 | fn representation_of_number() {
[INFO] [stderr]    |    ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `implicit_cast`
[INFO] [stderr]   --> src/bin/data_types.rs:27:4
[INFO] [stderr]    |
[INFO] [stderr] 27 | fn implicit_cast() {
[INFO] [stderr]    |    ^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `std_f32`
[INFO] [stderr]   --> src/bin/data_types.rs:34:4
[INFO] [stderr]    |
[INFO] [stderr] 34 | fn std_f32() {
[INFO] [stderr]    |    ^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `logic_op`
[INFO] [stderr]   --> src/bin/data_types.rs:71:4
[INFO] [stderr]    |
[INFO] [stderr] 71 | fn logic_op() {
[INFO] [stderr]    |    ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `chars`
[INFO] [stderr]   --> src/bin/data_types.rs:87:4
[INFO] [stderr]    |
[INFO] [stderr] 87 | fn chars() {
[INFO] [stderr]    |    ^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `tuples`
[INFO] [stderr]   --> src/bin/data_types.rs:97:4
[INFO] [stderr]    |
[INFO] [stderr] 97 | fn tuples() {
[INFO] [stderr]    |    ^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: 8 warnings emitted
[INFO] [stderr] 
[INFO] [stderr] error: build failed
[INFO] running `"docker" "inspect" "96721a39618324c5046bd15f58c1910645603beb71f2249f91154144790a0f69"`
[INFO] running `"docker" "rm" "-f" "96721a39618324c5046bd15f58c1910645603beb71f2249f91154144790a0f69"`
[INFO] [stdout] 96721a39618324c5046bd15f58c1910645603beb71f2249f91154144790a0f69