[INFO] cloning repository https://github.com/bl0rch1d/library_rust
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[INFO] checking bl0rch1d/library_rust against master#350d0ef0ec0493e6d21cfb265cb8211a0e74d766 for pr-145342-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fbl0rch1d%2Flibrary_rust" "/workspace/builds/worker-5-tc1/source", kill_on_drop: false }`
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[INFO] started tweaking git repo https://github.com/bl0rch1d/library_rust
[INFO] finished tweaking git repo https://github.com/bl0rch1d/library_rust
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[INFO] crate git repo https://github.com/bl0rch1d/library_rust already has a lockfile, it will not be regenerated
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[INFO] [stderr]     Updating crates.io index
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[INFO] [stderr]   Downloaded serde_yaml v0.8.17
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[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-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@sha256:7ad1b28ee6f5f7f699f6cf7015098d6ccdd96d6f2d78dd06228f5b4c9faf309c" "/opt/rustwide/cargo-home/bin/cargo" "+350d0ef0ec0493e6d21cfb265cb8211a0e74d766" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
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[INFO] [stderr]    Compiling proc-macro2 v1.0.27
[INFO] [stderr]    Compiling unicode-xid v0.2.2
[INFO] [stderr]    Compiling syn v1.0.73
[INFO] [stderr]    Compiling serde_derive v1.0.126
[INFO] [stderr]    Compiling serde v1.0.126
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[INFO] [stderr]     Checking dtoa v0.4.8
[INFO] [stderr]     Checking yaml-rust v0.4.5
[INFO] [stderr]    Compiling quote v1.0.9
[INFO] [stderr]     Checking serde_yaml v0.8.17
[INFO] [stderr]     Checking library_rust v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `library::Entity`
[INFO] [stdout]   --> src/main.rs:10:5
[INFO] [stdout]    |
[INFO] [stdout] 10 | use library::Entity;
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `library::Entity`
[INFO] [stdout]   --> src/main.rs:10:5
[INFO] [stdout]    |
[INFO] [stdout] 10 | use library::Entity;
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant `NAME_LENGTH` is never used
[INFO] [stdout]  --> src/author.rs:3:7
[INFO] [stdout]   |
[INFO] [stdout] 3 | const NAME_LENGTH: usize = 20;
[INFO] [stdout]   |       ^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant `BIO_LENGTH` is never used
[INFO] [stdout]  --> src/author.rs:4:7
[INFO] [stdout]   |
[INFO] [stdout] 4 | const BIO_LENGTH: usize = 140;
[INFO] [stdout]   |       ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated items `new`, `to_s`, and `validate` are never used
[INFO] [stdout]   --> src/author.rs:7:12
[INFO] [stdout]    |
[INFO] [stdout]  6 | impl Author {
[INFO] [stdout]    | ----------- associated items in this implementation
[INFO] [stdout]  7 |     pub fn new(name: String, bio: String) -> Author {
[INFO] [stdout]    |            ^^^
[INFO] [stdout] ...
[INFO] [stdout] 18 |     pub fn to_s(self) -> String {
[INFO] [stdout]    |            ^^^^
[INFO] [stdout] ...
[INFO] [stdout] 22 |     fn validate(name: &String, bio: &String) -> bool {
[INFO] [stdout]    |        ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant `TITLE_LENGTH` is never used
[INFO] [stdout]  --> src/book.rs:3:7
[INFO] [stdout]   |
[INFO] [stdout] 3 | const TITLE_LENGTH: usize = 50;
[INFO] [stdout]   |       ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated items `new`, `to_s`, and `validate` are never used
[INFO] [stdout]   --> src/book.rs:6:12
[INFO] [stdout]    |
[INFO] [stdout]  5 | impl Book {
[INFO] [stdout]    | --------- associated items in this implementation
[INFO] [stdout]  6 |     pub fn new(title: String, author: &Author) -> Book {
[INFO] [stdout]    |            ^^^
[INFO] [stdout] ...
[INFO] [stdout] 17 |     pub fn to_s(self) -> String {
[INFO] [stdout]    |            ^^^^
[INFO] [stdout] ...
[INFO] [stdout] 21 |     fn validate(title: &String) -> bool {
[INFO] [stdout]    |        ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant `NAME_LENGTH` is never used
[INFO] [stdout]  --> src/reader.rs:3:7
[INFO] [stdout]   |
[INFO] [stdout] 3 | const NAME_LENGTH: usize = 20;
[INFO] [stdout]   |       ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant `EMAIL_LENGTH` is never used
[INFO] [stdout]  --> src/reader.rs:4:7
[INFO] [stdout]   |
[INFO] [stdout] 4 | const EMAIL_LENGTH: usize = 50;
[INFO] [stdout]   |       ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant `COMMON_STRING_LENGTH` is never used
[INFO] [stdout]  --> src/reader.rs:5:7
[INFO] [stdout]   |
[INFO] [stdout] 5 | const COMMON_STRING_LENGTH: usize = 60;
[INFO] [stdout]   |       ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated items `new`, `to_s`, and `validate` are never used
[INFO] [stdout]   --> src/reader.rs:8:12
[INFO] [stdout]    |
[INFO] [stdout]  7 | impl Reader {
[INFO] [stdout]    | ----------- associated items in this implementation
[INFO] [stdout]  8 |     pub fn new(name: String, email: String, city: String, street: String, house: String) -> Reader {
[INFO] [stdout]    |            ^^^
[INFO] [stdout] ...
[INFO] [stdout] 22 |     pub fn to_s(self) -> String {
[INFO] [stdout]    |            ^^^^
[INFO] [stdout] ...
[INFO] [stdout] 33 |     fn validate(name: &String, email: &String, city: &String, street: &String, house: &String) -> bool {
[INFO] [stdout]    |        ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated items `new` and `to_s` are never used
[INFO] [stdout]   --> src/order.rs:4:12
[INFO] [stdout]    |
[INFO] [stdout]  3 | impl Order {
[INFO] [stdout]    | ---------- associated items in this implementation
[INFO] [stdout]  4 |     pub fn new(book: &Book, reader: &Reader, date: String) -> Order {
[INFO] [stdout]    |            ^^^
[INFO] [stdout] ...
[INFO] [stdout] 12 |     pub fn to_s(self) -> String {
[INFO] [stdout]    |            ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum `Entity` is never used
[INFO] [stdout]  --> src/library.rs:3:10
[INFO] [stdout]   |
[INFO] [stdout] 3 | pub enum Entity<'a> {
[INFO] [stdout]   |          ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `add_entity` is never used
[INFO] [stdout]   --> src/library.rs:20:12
[INFO] [stdout]    |
[INFO] [stdout] 10 | impl Library {
[INFO] [stdout]    | ------------ method in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 20 |     pub fn add_entity(&mut self, entity: Entity) {
[INFO] [stdout]    |            ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `save_data` is never used
[INFO] [stdout]  --> src/storage.rs:9:8
[INFO] [stdout]   |
[INFO] [stdout] 8 | pub trait Storage {
[INFO] [stdout]   |           ------- method in this trait
[INFO] [stdout] 9 |     fn save_data(&self) -> Result<()>;
[INFO] [stdout]   |        ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> src/main.rs:39:5
[INFO] [stdout]    |
[INFO] [stdout] 39 |     library.load_data();
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout]    = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]    |
[INFO] [stdout] 39 |     let _ = library.load_data();
[INFO] [stdout]    |     +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> src/storage.rs:17:9
[INFO] [stdout]    |
[INFO] [stdout] 17 |         serde_yaml::to_writer(file, self);
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]    |
[INFO] [stdout] 17 |         let _ = serde_yaml::to_writer(file, self);
[INFO] [stdout]    |         +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant `NAME_LENGTH` is never used
[INFO] [stdout]  --> src/author.rs:3:7
[INFO] [stdout]   |
[INFO] [stdout] 3 | const NAME_LENGTH: usize = 20;
[INFO] [stdout]   |       ^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant `BIO_LENGTH` is never used
[INFO] [stdout]  --> src/author.rs:4:7
[INFO] [stdout]   |
[INFO] [stdout] 4 | const BIO_LENGTH: usize = 140;
[INFO] [stdout]   |       ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated items `new`, `to_s`, and `validate` are never used
[INFO] [stdout]   --> src/author.rs:7:12
[INFO] [stdout]    |
[INFO] [stdout]  6 | impl Author {
[INFO] [stdout]    | ----------- associated items in this implementation
[INFO] [stdout]  7 |     pub fn new(name: String, bio: String) -> Author {
[INFO] [stdout]    |            ^^^
[INFO] [stdout] ...
[INFO] [stdout] 18 |     pub fn to_s(self) -> String {
[INFO] [stdout]    |            ^^^^
[INFO] [stdout] ...
[INFO] [stdout] 22 |     fn validate(name: &String, bio: &String) -> bool {
[INFO] [stdout]    |        ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant `TITLE_LENGTH` is never used
[INFO] [stdout]  --> src/book.rs:3:7
[INFO] [stdout]   |
[INFO] [stdout] 3 | const TITLE_LENGTH: usize = 50;
[INFO] [stdout]   |       ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated items `new`, `to_s`, and `validate` are never used
[INFO] [stdout]   --> src/book.rs:6:12
[INFO] [stdout]    |
[INFO] [stdout]  5 | impl Book {
[INFO] [stdout]    | --------- associated items in this implementation
[INFO] [stdout]  6 |     pub fn new(title: String, author: &Author) -> Book {
[INFO] [stdout]    |            ^^^
[INFO] [stdout] ...
[INFO] [stdout] 17 |     pub fn to_s(self) -> String {
[INFO] [stdout]    |            ^^^^
[INFO] [stdout] ...
[INFO] [stdout] 21 |     fn validate(title: &String) -> bool {
[INFO] [stdout]    |        ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant `NAME_LENGTH` is never used
[INFO] [stdout]  --> src/reader.rs:3:7
[INFO] [stdout]   |
[INFO] [stdout] 3 | const NAME_LENGTH: usize = 20;
[INFO] [stdout]   |       ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant `EMAIL_LENGTH` is never used
[INFO] [stdout]  --> src/reader.rs:4:7
[INFO] [stdout]   |
[INFO] [stdout] 4 | const EMAIL_LENGTH: usize = 50;
[INFO] [stdout]   |       ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant `COMMON_STRING_LENGTH` is never used
[INFO] [stdout]  --> src/reader.rs:5:7
[INFO] [stdout]   |
[INFO] [stdout] 5 | const COMMON_STRING_LENGTH: usize = 60;
[INFO] [stdout]   |       ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated items `new`, `to_s`, and `validate` are never used
[INFO] [stdout]   --> src/reader.rs:8:12
[INFO] [stdout]    |
[INFO] [stdout]  7 | impl Reader {
[INFO] [stdout]    | ----------- associated items in this implementation
[INFO] [stdout]  8 |     pub fn new(name: String, email: String, city: String, street: String, house: String) -> Reader {
[INFO] [stdout]    |            ^^^
[INFO] [stdout] ...
[INFO] [stdout] 22 |     pub fn to_s(self) -> String {
[INFO] [stdout]    |            ^^^^
[INFO] [stdout] ...
[INFO] [stdout] 33 |     fn validate(name: &String, email: &String, city: &String, street: &String, house: &String) -> bool {
[INFO] [stdout]    |        ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated items `new` and `to_s` are never used
[INFO] [stdout]   --> src/order.rs:4:12
[INFO] [stdout]    |
[INFO] [stdout]  3 | impl Order {
[INFO] [stdout]    | ---------- associated items in this implementation
[INFO] [stdout]  4 |     pub fn new(book: &Book, reader: &Reader, date: String) -> Order {
[INFO] [stdout]    |            ^^^
[INFO] [stdout] ...
[INFO] [stdout] 12 |     pub fn to_s(self) -> String {
[INFO] [stdout]    |            ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum `Entity` is never used
[INFO] [stdout]  --> src/library.rs:3:10
[INFO] [stdout]   |
[INFO] [stdout] 3 | pub enum Entity<'a> {
[INFO] [stdout]   |          ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `add_entity` is never used
[INFO] [stdout]   --> src/library.rs:20:12
[INFO] [stdout]    |
[INFO] [stdout] 10 | impl Library {
[INFO] [stdout]    | ------------ method in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 20 |     pub fn add_entity(&mut self, entity: Entity) {
[INFO] [stdout]    |            ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `save_data` is never used
[INFO] [stdout]  --> src/storage.rs:9:8
[INFO] [stdout]   |
[INFO] [stdout] 8 | pub trait Storage {
[INFO] [stdout]   |           ------- method in this trait
[INFO] [stdout] 9 |     fn save_data(&self) -> Result<()>;
[INFO] [stdout]   |        ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> src/main.rs:39:5
[INFO] [stdout]    |
[INFO] [stdout] 39 |     library.load_data();
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout]    = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]    |
[INFO] [stdout] 39 |     let _ = library.load_data();
[INFO] [stdout]    |     +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> src/storage.rs:17:9
[INFO] [stdout]    |
[INFO] [stdout] 17 |         serde_yaml::to_writer(file, self);
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]    |
[INFO] [stdout] 17 |         let _ = serde_yaml::to_writer(file, self);
[INFO] [stdout]    |         +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 11.19s
[INFO] running `Command { std: "docker" "inspect" "5be82c3f4f936eb9d2e1a50b33466b0d1cab75ed9ff9a50c5a0da43c782d8add", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "5be82c3f4f936eb9d2e1a50b33466b0d1cab75ed9ff9a50c5a0da43c782d8add", kill_on_drop: false }`
[INFO] [stdout] 5be82c3f4f936eb9d2e1a50b33466b0d1cab75ed9ff9a50c5a0da43c782d8add