[INFO] cloning repository https://github.com/tasnuva1/rust-learning
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/tasnuva1/rust-learning" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ftasnuva1%2Frust-learning", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ftasnuva1%2Frust-learning'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 5d83e408b1b464cd5847f37ba63a89dc477fb822
[INFO] checking tasnuva1/rust-learning against try#22cc29ba5b459fb386c0406b9baf3a49eb0fba39 for pr-146095
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ftasnuva1%2Frust-learning" "/workspace/builds/worker-4-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-4-tc2/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/tasnuva1/rust-learning
[INFO] finished tweaking git repo https://github.com/tasnuva1/rust-learning
[INFO] tweaked toml for git repo https://github.com/tasnuva1/rust-learning written to /workspace/builds/worker-4-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/tasnuva1/rust-learning on toolchain 22cc29ba5b459fb386c0406b9baf3a49eb0fba39
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+22cc29ba5b459fb386c0406b9baf3a49eb0fba39" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/tasnuva1/rust-learning 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" "+22cc29ba5b459fb386c0406b9baf3a49eb0fba39" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[ERROR] error running command: no output for 300 seconds
[INFO] checking tasnuva1/rust-learning against try#22cc29ba5b459fb386c0406b9baf3a49eb0fba39 for pr-146095
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ftasnuva1%2Frust-learning" "/workspace/builds/worker-4-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-4-tc2/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/tasnuva1/rust-learning
[INFO] finished tweaking git repo https://github.com/tasnuva1/rust-learning
[INFO] tweaked toml for git repo https://github.com/tasnuva1/rust-learning written to /workspace/builds/worker-4-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/tasnuva1/rust-learning on toolchain 22cc29ba5b459fb386c0406b9baf3a49eb0fba39
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+22cc29ba5b459fb386c0406b9baf3a49eb0fba39" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/tasnuva1/rust-learning 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" "+22cc29ba5b459fb386c0406b9baf3a49eb0fba39" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded anyhow v1.0.92
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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:aa71247004a7fa38d13ec170f48f06cdedf5bc50b2a8645e56ed7e992e6fa513" "/opt/rustwide/cargo-home/bin/cargo" "+22cc29ba5b459fb386c0406b9baf3a49eb0fba39" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 26e224bc0fc2fca224a309054fc97d1cf6b0c6329c94817a32da48441abb1660
[INFO] running `Command { std: "docker" "start" "-a" "26e224bc0fc2fca224a309054fc97d1cf6b0c6329c94817a32da48441abb1660", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "26e224bc0fc2fca224a309054fc97d1cf6b0c6329c94817a32da48441abb1660", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "26e224bc0fc2fca224a309054fc97d1cf6b0c6329c94817a32da48441abb1660", kill_on_drop: false }`
[INFO] [stdout] 26e224bc0fc2fca224a309054fc97d1cf6b0c6329c94817a32da48441abb1660
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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:aa71247004a7fa38d13ec170f48f06cdedf5bc50b2a8645e56ed7e992e6fa513" "/opt/rustwide/cargo-home/bin/cargo" "+22cc29ba5b459fb386c0406b9baf3a49eb0fba39" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 45a48916af76951d632cc2171c22b4a6e106fc367397787c0b47fc2e6ead9b93
[INFO] running `Command { std: "docker" "start" "-a" "45a48916af76951d632cc2171c22b4a6e106fc367397787c0b47fc2e6ead9b93", kill_on_drop: false }`
[INFO] [stderr]    Compiling serde v1.0.214
[INFO] [stderr]    Compiling anyhow v1.0.92
[INFO] [stderr]    Compiling thiserror v1.0.65
[INFO] [stderr]    Compiling serde_json v1.0.132
[INFO] [stderr]     Checking bytes v1.8.0
[INFO] [stderr]    Compiling syn v2.0.85
[INFO] [stderr]    Compiling serde_derive v1.0.214
[INFO] [stderr]    Compiling thiserror-impl v1.0.65
[INFO] [stderr]     Checking learning v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] error: an inner attribute is not permitted in this context
[INFO] [stdout]   --> src/rust_by_examples.rs:56:1
[INFO] [stdout]    |
[INFO] [stdout] 56 |   #![allow(unreachable_code, unused_labels)]
[INFO] [stdout]    |   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 57 |
[INFO] [stdout] 58 | / fn main() {
[INFO] [stdout] 59 | |     'outer: loop {
[INFO] [stdout] 60 | |         println!("Entered the outer loop");
[INFO] [stdout] ...  |
[INFO] [stdout] 75 | |     println!("Exited the outer loop");
[INFO] [stdout] 76 | | }
[INFO] [stdout]    | |_- the inner attribute doesn't annotate this function
[INFO] [stdout]    |
[INFO] [stdout]    = note: inner attributes, like `#![no_std]`, annotate the item enclosing them, and are usually found at the beginning of source files
[INFO] [stdout] help: to annotate the function, change the attribute from inner to outer style
[INFO] [stdout]    |
[INFO] [stdout] 56 - #![allow(unreachable_code, unused_labels)]
[INFO] [stdout] 56 + #[allow(unreachable_code, unused_labels)]
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: an inner attribute is not permitted in this context
[INFO] [stdout]   --> src/rust_by_examples.rs:56:1
[INFO] [stdout]    |
[INFO] [stdout] 56 |   #![allow(unreachable_code, unused_labels)]
[INFO] [stdout]    |   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 57 |
[INFO] [stdout] 58 | / fn main() {
[INFO] [stdout] 59 | |     'outer: loop {
[INFO] [stdout] 60 | |         println!("Entered the outer loop");
[INFO] [stdout] ...  |
[INFO] [stdout] 75 | |     println!("Exited the outer loop");
[INFO] [stdout] 76 | | }
[INFO] [stdout]    | |_- the inner attribute doesn't annotate this function
[INFO] [stdout]    |
[INFO] [stdout]    = note: inner attributes, like `#![no_std]`, annotate the item enclosing them, and are usually found at the beginning of source files
[INFO] [stdout] help: to annotate the function, change the attribute from inner to outer style
[INFO] [stdout]    |
[INFO] [stdout] 56 - #![allow(unreachable_code, unused_labels)]
[INFO] [stdout] 56 + #[allow(unreachable_code, unused_labels)]
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: expected item, found keyword `let`
[INFO] [stdout]    --> src/rust_by_examples.rs:428:1
[INFO] [stdout]     |
[INFO] [stdout] 428 | let optional = Some(7);
[INFO] [stdout]     | ^^^
[INFO] [stdout]     | |
[INFO] [stdout]     | `let` cannot be used for global variables
[INFO] [stdout]     | help: consider using `static` or `const` instead of `let`
[INFO] [stdout]     |
[INFO] [stdout]     = note: for a full list of items that can appear in modules, see <https://doc.rust-lang.org/reference/items.html>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: expected item, found keyword `let`
[INFO] [stdout]    --> src/rust_by_examples.rs:428:1
[INFO] [stdout]     |
[INFO] [stdout] 428 | let optional = Some(7);
[INFO] [stdout]     | ^^^
[INFO] [stdout]     | |
[INFO] [stdout]     | `let` cannot be used for global variables
[INFO] [stdout]     | help: consider using `static` or `const` instead of `let`
[INFO] [stdout]     |
[INFO] [stdout]     = note: for a full list of items that can appear in modules, see <https://doc.rust-lang.org/reference/items.html>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0425]: cannot find value `writer` in this scope
[INFO] [stdout]    --> src/note_book.rs:337:27
[INFO] [stdout]     |
[INFO] [stdout] 337 |     serde_json::to_writer(writer, &address); // takes ownership. can not use writer for later writing: writer.write_all(b"\n")?;
[INFO] [stdout]     |                           ^^^^^^ not found in this scope
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0425]: cannot find value `writer` in this scope
[INFO] [stdout]    --> src/note_book.rs:337:27
[INFO] [stdout]     |
[INFO] [stdout] 337 |     serde_json::to_writer(writer, &address); // takes ownership. can not use writer for later writing: writer.write_all(b"\n")?;
[INFO] [stdout]     |                           ^^^^^^ not found in this scope
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0425]: cannot find value `writer` in this scope
[INFO] [stdout]    --> src/note_book.rs:338:33
[INFO] [stdout]     |
[INFO] [stdout] 338 |     serde_json::to_writer(&mut *writer, &address);
[INFO] [stdout]     |                                 ^^^^^^ not found in this scope
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0425]: cannot find value `writer` in this scope
[INFO] [stdout]    --> src/note_book.rs:338:33
[INFO] [stdout]     |
[INFO] [stdout] 338 |     serde_json::to_writer(&mut *writer, &address);
[INFO] [stdout]     |                                 ^^^^^^ not found in this scope
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `bail`
[INFO] [stdout]  --> src/anyhow.rs:1:22
[INFO] [stdout]   |
[INFO] [stdout] 1 | use anyhow::{anyhow, bail, Context, Result};
[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: `bail`
[INFO] [stdout]  --> src/anyhow.rs:1:22
[INFO] [stdout]   |
[INFO] [stdout] 1 | use anyhow::{anyhow, bail, Context, Result};
[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: `serde_json::Result`
[INFO] [stdout]    --> src/note_book.rs:315:9
[INFO] [stdout]     |
[INFO] [stdout] 315 |     use serde_json::Result;
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `serde_json::Result`
[INFO] [stdout]    --> src/note_book.rs:315:9
[INFO] [stdout]     |
[INFO] [stdout] 315 |     use serde_json::Result;
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `TcpStream`
[INFO] [stdout]    --> src/note_book.rs:377:37
[INFO] [stdout]     |
[INFO] [stdout] 377 |         use std::net::{TcpListener, TcpStream};
[INFO] [stdout]     |                                     ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `TcpStream`
[INFO] [stdout]    --> src/note_book.rs:377:37
[INFO] [stdout]     |
[INFO] [stdout] 377 |         use std::net::{TcpListener, TcpStream};
[INFO] [stdout]     |                                     ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0592]: duplicate definitions with name `some`
[INFO] [stdout]    --> src/note_book.rs:150:9
[INFO] [stdout]     |
[INFO] [stdout] 149 |         fn some(self: &Self) {} // self = interface stucture = Self
[INFO] [stdout]     |         -------------------- other definition for `some`
[INFO] [stdout] 150 |         fn some(self: &Employee) {} // self = Employee instance = Employee
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^^^^^^^ duplicate definitions for `some`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0592]: duplicate definitions with name `some`
[INFO] [stdout]    --> src/note_book.rs:150:9
[INFO] [stdout]     |
[INFO] [stdout] 149 |         fn some(self: &Self) {} // self = interface stucture = Self
[INFO] [stdout]     |         -------------------- other definition for `some`
[INFO] [stdout] 150 |         fn some(self: &Employee) {} // self = Employee instance = Employee
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^^^^^^^ duplicate definitions for `some`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0592]: duplicate definitions with name `some`
[INFO] [stdout]    --> src/note_book.rs:152:9
[INFO] [stdout]     |
[INFO] [stdout] 149 | ...   fn some(self: &Self) {} // self = interface stucture = Self
[INFO] [stdout]     |       -------------------- other definition for `some`
[INFO] [stdout] ...
[INFO] [stdout] 152 | ...   fn some(&self) {} // self = instance //*** any trait fn it has access to instance to operate on it. it will invoke like this:...
[INFO] [stdout]     |       ^^^^^^^^^^^^^^ duplicate definitions for `some`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0592]: duplicate definitions with name `some`
[INFO] [stdout]    --> src/note_book.rs:152:9
[INFO] [stdout]     |
[INFO] [stdout] 149 | ...   fn some(self: &Self) {} // self = interface stucture = Self
[INFO] [stdout]     |       -------------------- other definition for `some`
[INFO] [stdout] ...
[INFO] [stdout] 152 | ...   fn some(&self) {} // self = instance //*** any trait fn it has access to instance to operate on it. it will invoke like this:...
[INFO] [stdout]     |       ^^^^^^^^^^^^^^ duplicate definitions for `some`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0277]: `Employee` doesn't implement `Debug`
[INFO] [stdout]    --> src/note_book.rs:144:22
[INFO] [stdout]     |
[INFO] [stdout] 144 |     println!("{:?}", emp_1);
[INFO] [stdout]     |               ----   ^^^^^ `Employee` cannot be formatted using `{:?}` because it doesn't implement `Debug`
[INFO] [stdout]     |               |
[INFO] [stdout]     |               required by this formatting parameter
[INFO] [stdout]     |
[INFO] [stdout]     = help: the trait `Debug` is not implemented for `Employee`
[INFO] [stdout]     = note: add `#[derive(Debug)]` to `Employee` or manually `impl Debug for Employee`
[INFO] [stdout]     = note: this error originates in the macro `$crate::format_args_nl` which comes from the expansion of the macro `println` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] help: consider annotating `Employee` with `#[derive(Debug)]`
[INFO] [stdout]     |
[INFO] [stdout] 115 +     #[derive(Debug)]
[INFO] [stdout] 116 |     struct Employee {
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0277]: `Employee` doesn't implement `Debug`
[INFO] [stdout]    --> src/note_book.rs:144:22
[INFO] [stdout]     |
[INFO] [stdout] 144 |     println!("{:?}", emp_1);
[INFO] [stdout]     |               ----   ^^^^^ `Employee` cannot be formatted using `{:?}` because it doesn't implement `Debug`
[INFO] [stdout]     |               |
[INFO] [stdout]     |               required by this formatting parameter
[INFO] [stdout]     |
[INFO] [stdout]     = help: the trait `Debug` is not implemented for `Employee`
[INFO] [stdout]     = note: add `#[derive(Debug)]` to `Employee` or manually `impl Debug for Employee`
[INFO] [stdout]     = note: this error originates in the macro `$crate::format_args_nl` which comes from the expansion of the macro `println` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] help: consider annotating `Employee` with `#[derive(Debug)]`
[INFO] [stdout]     |
[INFO] [stdout] 115 +     #[derive(Debug)]
[INFO] [stdout] 116 |     struct Employee {
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0277]: the `?` operator can only be used in a function that returns `Result` or `Option` (or another type that implements `FromResidual`)
[INFO] [stdout]    --> src/note_book.rs:382:49
[INFO] [stdout]     |
[INFO] [stdout] 349 |     fn typed_example() {
[INFO] [stdout]     |     ------------------ this function should return `Result` or `Option` to accept `?`
[INFO] [stdout] ...
[INFO] [stdout] 382 |             let p = Person::deserialize(&mut de)?;
[INFO] [stdout]     |                                                 ^ cannot use the `?` operator in a function that returns `()`
[INFO] [stdout]     |
[INFO] [stdout] help: consider adding return type
[INFO] [stdout]     |
[INFO] [stdout] 349 |     fn typed_example() -> Result<(), Box<dyn std::error::Error>> {
[INFO] [stdout]     |                        +++++++++++++++++++++++++++++++++++++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0277]: the `?` operator can only be used in a function that returns `Result` or `Option` (or another type that implements `FromResidual`)
[INFO] [stdout]    --> src/note_book.rs:382:49
[INFO] [stdout]     |
[INFO] [stdout] 349 |     fn typed_example() {
[INFO] [stdout]     |     ------------------ this function should return `Result` or `Option` to accept `?`
[INFO] [stdout] ...
[INFO] [stdout] 382 |             let p = Person::deserialize(&mut de)?;
[INFO] [stdout]     |                                                 ^ cannot use the `?` operator in a function that returns `()`
[INFO] [stdout]     |
[INFO] [stdout] help: consider adding return type
[INFO] [stdout]     |
[INFO] [stdout] 349 |     fn typed_example() -> Result<(), Box<dyn std::error::Error>> {
[INFO] [stdout]     |                        +++++++++++++++++++++++++++++++++++++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0308]: mismatched types
[INFO] [stdout]    --> src/note_book.rs:383:13
[INFO] [stdout]     |
[INFO] [stdout] 383 |             Ok(p)
[INFO] [stdout]     |             ^^^^^ expected `()`, found `Result<Person, _>`
[INFO] [stdout]     |
[INFO] [stdout]     = note: expected unit type `()`
[INFO] [stdout]                     found enum `Result<Person, _>`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0308]: mismatched types
[INFO] [stdout]    --> src/note_book.rs:383:13
[INFO] [stdout]     |
[INFO] [stdout] 383 |             Ok(p)
[INFO] [stdout]     |             ^^^^^ expected `()`, found `Result<Person, _>`
[INFO] [stdout]     |
[INFO] [stdout]     = note: expected unit type `()`
[INFO] [stdout]                     found enum `Result<Person, _>`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `content`
[INFO] [stdout]  --> src/anyhow.rs:7:9
[INFO] [stdout]   |
[INFO] [stdout] 7 |     let content = std::fs::read("filename.txt").context("Failed to detach the important thing")?;
[INFO] [stdout]   |         ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_content`
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `content`
[INFO] [stdout]  --> src/anyhow.rs:7:9
[INFO] [stdout]   |
[INFO] [stdout] 7 |     let content = std::fs::read("filename.txt").context("Failed to detach the important thing")?;
[INFO] [stdout]   |         ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_content`
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `content`
[INFO] [stdout]  --> src/anyhow.rs:8:9
[INFO] [stdout]   |
[INFO] [stdout] 8 |     let content =
[INFO] [stdout]   |         ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_content`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `content`
[INFO] [stdout]  --> src/anyhow.rs:8:9
[INFO] [stdout]   |
[INFO] [stdout] 8 |     let content =
[INFO] [stdout]   |         ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_content`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0004]: non-exhaustive patterns: `Some(&DataStoreError::InvalidHeader { .. })` and `Some(&DataStoreError::OutOfBounds { .. })` not covered
[INFO] [stdout]   --> src/anyhow.rs:43:25
[INFO] [stdout]    |
[INFO] [stdout] 43 |         Err(e) => match e.downcast_ref() {
[INFO] [stdout]    |                         ^^^^^^^^^^^^^^^^ patterns `Some(&DataStoreError::InvalidHeader { .. })` and `Some(&DataStoreError::OutOfBounds { .. })` not covered
[INFO] [stdout]    |
[INFO] [stdout] note: `std::option::Option<&DataStoreError>` defined here
[INFO] [stdout]   --> /rustc/22cc29ba5b459fb386c0406b9baf3a49eb0fba39/library/core/src/option.rs:600:0
[INFO] [stdout]   ::: /rustc/22cc29ba5b459fb386c0406b9baf3a49eb0fba39/library/core/src/option.rs:608:4
[INFO] [stdout]    |
[INFO] [stdout]    = note: not covered
[INFO] [stdout]    = note: the matched value is of type `std::option::Option<&DataStoreError>`
[INFO] [stdout] help: ensure that all possible cases are being handled by adding a match arm with a wildcard pattern, a match arm with multiple or-patterns as shown, or multiple match arms
[INFO] [stdout]    |
[INFO] [stdout] 47 ~             None => (),
[INFO] [stdout] 48 ~             Some(&DataStoreError::InvalidHeader { .. }) | Some(&DataStoreError::OutOfBounds { .. }) => todo!(),
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0004]: non-exhaustive patterns: `Some(&DataStoreError::InvalidHeader { .. })` and `Some(&DataStoreError::OutOfBounds { .. })` not covered
[INFO] [stdout]   --> src/anyhow.rs:43:25
[INFO] [stdout]    |
[INFO] [stdout] 43 |         Err(e) => match e.downcast_ref() {
[INFO] [stdout]    |                         ^^^^^^^^^^^^^^^^ patterns `Some(&DataStoreError::InvalidHeader { .. })` and `Some(&DataStoreError::OutOfBounds { .. })` not covered
[INFO] [stdout]    |
[INFO] [stdout] note: `std::option::Option<&DataStoreError>` defined here
[INFO] [stdout]   --> /rustc/22cc29ba5b459fb386c0406b9baf3a49eb0fba39/library/core/src/option.rs:600:0
[INFO] [stdout]   ::: /rustc/22cc29ba5b459fb386c0406b9baf3a49eb0fba39/library/core/src/option.rs:608:4
[INFO] [stdout]    |
[INFO] [stdout]    = note: not covered
[INFO] [stdout]    = note: the matched value is of type `std::option::Option<&DataStoreError>`
[INFO] [stdout] help: ensure that all possible cases are being handled by adding a match arm with a wildcard pattern, a match arm with multiple or-patterns as shown, or multiple match arms
[INFO] [stdout]    |
[INFO] [stdout] 47 ~             None => (),
[INFO] [stdout] 48 ~             Some(&DataStoreError::InvalidHeader { .. }) | Some(&DataStoreError::OutOfBounds { .. }) => todo!(),
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `e`
[INFO] [stdout]    --> src/anyhow.rs:140:31
[INFO] [stdout]     |
[INFO] [stdout] 140 |     assert_eq!(x.map_or_else(|e| k * 2, |v| v.len()), 42);
[INFO] [stdout]     |                               ^ help: if this is intentional, prefix it with an underscore: `_e`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `e`
[INFO] [stdout]    --> src/anyhow.rs:137:31
[INFO] [stdout]     |
[INFO] [stdout] 137 |     assert_eq!(x.map_or_else(|e| k * 2, |v| v.len()), 3);
[INFO] [stdout]     |                               ^ help: if this is intentional, prefix it with an underscore: `_e`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `e`
[INFO] [stdout]    --> src/anyhow.rs:140:31
[INFO] [stdout]     |
[INFO] [stdout] 140 |     assert_eq!(x.map_or_else(|e| k * 2, |v| v.len()), 42);
[INFO] [stdout]     |                               ^ help: if this is intentional, prefix it with an underscore: `_e`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `e`
[INFO] [stdout]    --> src/anyhow.rs:137:31
[INFO] [stdout]     |
[INFO] [stdout] 137 |     assert_eq!(x.map_or_else(|e| k * 2, |v| v.len()), 3);
[INFO] [stdout]     |                               ^ help: if this is intentional, prefix it with an underscore: `_e`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/note_book.rs:27:13
[INFO] [stdout]    |
[INFO] [stdout] 27 |         let mut some_text = stringable_stucture.to_uppercase(); // it's the refence pointer which is auto derefernced
[INFO] [stdout]    |             ----^^^^^^^^^
[INFO] [stdout]    |             |
[INFO] [stdout]    |             help: remove this `mut`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_mut)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/note_book.rs:27:13
[INFO] [stdout]    |
[INFO] [stdout] 27 |         let mut some_text = stringable_stucture.to_uppercase(); // it's the refence pointer which is auto derefernced
[INFO] [stdout]    |             ----^^^^^^^^^
[INFO] [stdout]    |             |
[INFO] [stdout]    |             help: remove this `mut`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_mut)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `e`
[INFO] [stdout]    --> src/note_book.rs:125:23
[INFO] [stdout]     |
[INFO] [stdout] 125 |     fn emp_cal_handle(e: Employee) {} // doesn't imp copy trait, it move ownership
[INFO] [stdout]     |                       ^ help: if this is intentional, prefix it with an underscore: `_e`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `e`
[INFO] [stdout]    --> src/note_book.rs:125:23
[INFO] [stdout]     |
[INFO] [stdout] 125 |     fn emp_cal_handle(e: Employee) {} // doesn't imp copy trait, it move ownership
[INFO] [stdout]     |                       ^ help: if this is intentional, prefix it with an underscore: `_e`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `e`
[INFO] [stdout]    --> src/note_book.rs:128:15
[INFO] [stdout]     |
[INFO] [stdout] 128 |     fn bonase(e: &mut Employee) -> Employee {
[INFO] [stdout]     |               ^ help: if this is intentional, prefix it with an underscore: `_e`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `e`
[INFO] [stdout]    --> src/note_book.rs:128:15
[INFO] [stdout]     |
[INFO] [stdout] 128 |     fn bonase(e: &mut Employee) -> Employee {
[INFO] [stdout]     |               ^ help: if this is intentional, prefix it with an underscore: `_e`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `arr`
[INFO] [stdout]    --> src/note_book.rs:223:21
[INFO] [stdout]     |
[INFO] [stdout] 223 |     fn any_array<T>(arr: &[T]) {
[INFO] [stdout]     |                     ^^^ help: if this is intentional, prefix it with an underscore: `_arr`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `arr`
[INFO] [stdout]    --> src/note_book.rs:223:21
[INFO] [stdout]     |
[INFO] [stdout] 223 |     fn any_array<T>(arr: &[T]) {
[INFO] [stdout]     |                     ^^^ help: if this is intentional, prefix it with an underscore: `_arr`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `size`
[INFO] [stdout]    --> src/note_book.rs:225:13
[INFO] [stdout]     |
[INFO] [stdout] 225 |         let size = std::mem::size_of::<T>();
[INFO] [stdout]     |             ^^^^ help: if this is intentional, prefix it with an underscore: `_size`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `size`
[INFO] [stdout]    --> src/note_book.rs:225:13
[INFO] [stdout]     |
[INFO] [stdout] 225 |         let size = std::mem::size_of::<T>();
[INFO] [stdout]     |             ^^^^ help: if this is intentional, prefix it with an underscore: `_size`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] Some errors have detailed explanations: E0004, E0277, E0308, E0425, E0592.
[INFO] [stdout] 
[INFO] [stdout] Some errors have detailed explanations: E0004, E0277, E0308, E0425, E0592.
[INFO] [stdout] 
[INFO] [stdout] For more information about an error, try `rustc --explain E0004`.
[INFO] [stdout] 
[INFO] [stdout] For more information about an error, try `rustc --explain E0004`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `learning` (bin "learning" test) due to 10 previous errors; 12 warnings emitted
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: could not compile `learning` (bin "learning") due to 10 previous errors; 12 warnings emitted
[INFO] running `Command { std: "docker" "inspect" "45a48916af76951d632cc2171c22b4a6e106fc367397787c0b47fc2e6ead9b93", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "45a48916af76951d632cc2171c22b4a6e106fc367397787c0b47fc2e6ead9b93", kill_on_drop: false }`
[INFO] [stdout] 45a48916af76951d632cc2171c22b4a6e106fc367397787c0b47fc2e6ead9b93
