[INFO] cloning repository https://github.com/Saurus9290/rust-lifetimes-tutorial
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[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FSaurus9290%2Frust-lifetimes-tutorial'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] ebcc33cc5b53e79cf260049ce827f0e60ef9592a
[INFO] testing Saurus9290/rust-lifetimes-tutorial against try#9f93af291970322f4f1c6315ccde4d7078201159 for pr-146098-6
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FSaurus9290%2Frust-lifetimes-tutorial" "/workspace/builds/worker-4-tc2/source", kill_on_drop: false }`
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[INFO] validating manifest of git repo https://github.com/Saurus9290/rust-lifetimes-tutorial on toolchain 9f93af291970322f4f1c6315ccde4d7078201159
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+9f93af291970322f4f1c6315ccde4d7078201159" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/Saurus9290/rust-lifetimes-tutorial 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" "+9f93af291970322f4f1c6315ccde4d7078201159" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
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[INFO] [stdout] 78222f8ea8da9e61a55fc1883549b2b39b6803d3abd809660717231bcc2d7d93
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[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@sha256:4848fb76d95f26979359cc7e45710b1dbc8f3acb7aeedee7c460d7702230f228" "/opt/rustwide/cargo-home/bin/cargo" "+9f93af291970322f4f1c6315ccde4d7078201159" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] ef9c84e0b0ab351a75025768a582344aca130a9c07250af669ac9d5d9bfb51bd
[INFO] running `Command { std: "docker" "start" "-a" "ef9c84e0b0ab351a75025768a582344aca130a9c07250af669ac9d5d9bfb51bd", kill_on_drop: false }`
[INFO] [stderr]    Compiling rust-lifetimes-tutorial v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `std::collections::HashMap`
[INFO] [stdout]  --> src/07_advanced_examples.rs:3:5
[INFO] [stdout]   |
[INFO] [stdout] 3 | use std::collections::HashMap;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `first_word_or_default` is never used
[INFO] [stdout]   --> src/02_basic_syntax.rs:46:4
[INFO] [stdout]    |
[INFO] [stdout] 46 | fn first_word_or_default<'a, 'b>(text: &'a str, _default: &'b str) -> &'a str {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `first_word_or_default_fixed` is never used
[INFO] [stdout]   --> src/02_basic_syntax.rs:54:4
[INFO] [stdout]    |
[INFO] [stdout] 54 | fn first_word_or_default_fixed<'a>(text: &'a str, default: &'a str) -> &'a str {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `explain_the_error` is never used
[INFO] [stdout]   --> src/03_classic_problem.rs:69:4
[INFO] [stdout]    |
[INFO] [stdout] 69 | fn explain_the_error() {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `dangerous_function` is never used
[INFO] [stdout]   --> src/03_classic_problem.rs:84:4
[INFO] [stdout]    |
[INFO] [stdout] 84 | fn dangerous_function() -> &'static str {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `first_word` is never used
[INFO] [stdout]   --> src/03_classic_problem.rs:89:4
[INFO] [stdout]    |
[INFO] [stdout] 89 | fn first_word<'a>(s: &'a str) -> &'a str {
[INFO] [stdout]    |    ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `find_substring` is never used
[INFO] [stdout]    --> src/05_struct_lifetimes.rs:133:8
[INFO] [stdout]     |
[INFO] [stdout] 124 | impl<'a> TextParser<'a> {
[INFO] [stdout]     | ----------------------- method in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 133 |     fn find_substring(&self, pattern: &str) -> Option<&'a str> {
[INFO] [stdout]     |        ^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `MixedData` is never constructed
[INFO] [stdout]    --> src/05_struct_lifetimes.rs:154:8
[INFO] [stdout]     |
[INFO] [stdout] 154 | struct MixedData<'a> {
[INFO] [stdout]     |        ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated items `new`, `get_title`, `get_content`, and `get_summary` are never used
[INFO] [stdout]    --> src/05_struct_lifetimes.rs:161:8
[INFO] [stdout]     |
[INFO] [stdout] 160 | impl<'a> MixedData<'a> {
[INFO] [stdout]     | ---------------------- associated items in this implementation
[INFO] [stdout] 161 |     fn new(title: String, content: &'a str, id: u32) -> Self {
[INFO] [stdout]     |        ^^^
[INFO] [stdout] ...
[INFO] [stdout] 169 |     fn get_title(&self) -> &str {
[INFO] [stdout]     |        ^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 173 |     fn get_content(&self) -> &'a str {
[INFO] [stdout]     |        ^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 177 |     fn get_summary(&self) -> String {
[INFO] [stdout]     |        ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `create_invalid_book` is never used
[INFO] [stdout]    --> src/05_struct_lifetimes.rs:183:4
[INFO] [stdout]     |
[INFO] [stdout] 183 | fn create_invalid_book() -> Book<'static> {
[INFO] [stdout]     |    ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: methods `get_text`, `first_line`, and `starts_with_word` are never used
[INFO] [stdout]    --> src/08_lifetime_elision.rs:90:8
[INFO] [stdout]     |
[INFO] [stdout]  85 | impl<'a> TextAnalyzer<'a> {
[INFO] [stdout]     | ------------------------- methods in this implementation
[INFO] [stdout] ...
[INFO] [stdout]  90 |     fn get_text(&self) -> &str {
[INFO] [stdout]     |        ^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout]  94 |     fn first_line(&self) -> &str {
[INFO] [stdout]     |        ^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 106 |     fn starts_with_word(&self, word: &str) -> bool {
[INFO] [stdout]     |        ^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Container` is never constructed
[INFO] [stdout]    --> src/08_lifetime_elision.rs:139:8
[INFO] [stdout]     |
[INFO] [stdout] 139 | struct Container<'a> {
[INFO] [stdout]     |        ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: methods `get_data` and `compare` are never used
[INFO] [stdout]    --> src/08_lifetime_elision.rs:144:8
[INFO] [stdout]     |
[INFO] [stdout] 143 | impl<'a> Container<'a> {
[INFO] [stdout]     | ---------------------- methods in this implementation
[INFO] [stdout] 144 |     fn get_data(&self) -> &str {
[INFO] [stdout]     |        ^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 148 |     fn compare(&self, other: &str) -> bool {
[INFO] [stdout]     |        ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `demonstrate_elision_rules_detailed` is never used
[INFO] [stdout]    --> src/08_lifetime_elision.rs:154:4
[INFO] [stdout]     |
[INFO] [stdout] 154 | fn demonstrate_elision_rules_detailed() {
[INFO] [stdout]     |    ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait `Extractable` is never used
[INFO] [stdout]    --> src/08_lifetime_elision.rs:162:7
[INFO] [stdout]     |
[INFO] [stdout] 162 | trait Extractable {
[INFO] [stdout]     |       ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function `new` is never used
[INFO] [stdout]    --> src/08_lifetime_elision.rs:236:8
[INFO] [stdout]     |
[INFO] [stdout] 235 | impl<'a> Container<'a> {
[INFO] [stdout]     | ---------------------- associated function in this implementation
[INFO] [stdout] 236 |     fn new(data: &'a str) -> Self {
[INFO] [stdout]     |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `TextProcessor` is never constructed
[INFO] [stdout]    --> src/04_function_lifetimes.rs:115:8
[INFO] [stdout]     |
[INFO] [stdout] 115 | struct TextProcessor<'a> {
[INFO] [stdout]     |        ^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated items `new`, `get_words`, and `get_first_word` are never used
[INFO] [stdout]    --> src/04_function_lifetimes.rs:120:8
[INFO] [stdout]     |
[INFO] [stdout] 119 | impl<'a> TextProcessor<'a> {
[INFO] [stdout]     | -------------------------- associated items in this implementation
[INFO] [stdout] 120 |     fn new(text: &'a str) -> Self {
[INFO] [stdout]     |        ^^^
[INFO] [stdout] ...
[INFO] [stdout] 124 |     fn get_words(&self) -> Vec<&'a str> {
[INFO] [stdout]     |        ^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 128 |     fn get_first_word(&self) -> Option<&'a str> {
[INFO] [stdout]     |        ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `title` and `content` are never read
[INFO] [stdout]   --> src/07_advanced_examples.rs:37:5
[INFO] [stdout]    |
[INFO] [stdout] 36 | struct Book<'a> {
[INFO] [stdout]    |        ---- fields in this struct
[INFO] [stdout] 37 |     title: &'a str,
[INFO] [stdout]    |     ^^^^^
[INFO] [stdout] 38 |     content: &'a str,
[INFO] [stdout]    |     ^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `start_pos` is never read
[INFO] [stdout]   --> src/07_advanced_examples.rs:46:5
[INFO] [stdout]    |
[INFO] [stdout] 43 | struct Chapter<'a> {
[INFO] [stdout]    |        ------- field in this struct
[INFO] [stdout] ...
[INFO] [stdout] 46 |     start_pos: usize,
[INFO] [stdout]    |     ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `name` and `position` are never read
[INFO] [stdout]   --> src/07_advanced_examples.rs:51:5
[INFO] [stdout]    |
[INFO] [stdout] 50 | struct Bookmark<'a> {
[INFO] [stdout]    |        -------- fields in this struct
[INFO] [stdout] 51 |     name: &'a str,
[INFO] [stdout]    |     ^^^^
[INFO] [stdout] 52 |     position: usize,
[INFO] [stdout]    |     ^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Bookmark` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `get_first` is never used
[INFO] [stdout]    --> src/07_advanced_examples.rs:160:8
[INFO] [stdout]     |
[INFO] [stdout] 137 | / impl<'a, T> DataProcessor<'a, T> 
[INFO] [stdout] 138 | | where 
[INFO] [stdout] 139 | |     T: std::fmt::Display + 'a,
[INFO] [stdout]     | |______________________________- method in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 160 |       fn get_first(&self) -> Option<&'a T> {
[INFO] [stdout]     |          ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `id` and `data` are never read
[INFO] [stdout]    --> src/07_advanced_examples.rs:195:5
[INFO] [stdout]     |
[INFO] [stdout] 194 | struct Node<'a> {
[INFO] [stdout]     |        ---- fields in this struct
[INFO] [stdout] 195 |     id: usize,
[INFO] [stdout]     |     ^^
[INFO] [stdout] 196 |     data: &'a str,
[INFO] [stdout]     |     ^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `Node` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait `Processor` is never used
[INFO] [stdout]    --> src/07_advanced_examples.rs:255:7
[INFO] [stdout]     |
[INFO] [stdout] 255 | trait Processor<'a> {
[INFO] [stdout]     |       ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `UppercaseProcessor` is never constructed
[INFO] [stdout]    --> src/07_advanced_examples.rs:259:8
[INFO] [stdout]     |
[INFO] [stdout] 259 | struct UppercaseProcessor;
[INFO] [stdout]     |        ^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `TrimProcessor` is never constructed
[INFO] [stdout]    --> src/07_advanced_examples.rs:260:8
[INFO] [stdout]     |
[INFO] [stdout] 260 | struct TrimProcessor;
[INFO] [stdout]     |        ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `process_with_trait` is never used
[INFO] [stdout]    --> src/07_advanced_examples.rs:274:4
[INFO] [stdout]     |
[INFO] [stdout] 274 | fn process_with_trait<'a>(input: &'a str, processor: &dyn Processor<'a>) -> &'a str {
[INFO] [stdout]     |    ^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: methods `get_document` and `get_config` are never used
[INFO] [stdout]   --> src/09_best_practices.rs:72:8
[INFO] [stdout]    |
[INFO] [stdout] 61 | impl<'document, 'config> DocumentParser<'document, 'config> {
[INFO] [stdout]    | ----------------------------------------------------------- methods in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 72 |     fn get_document(&self) -> &'document str {
[INFO] [stdout]    |        ^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 76 |     fn get_config(&self) -> &'config str {
[INFO] [stdout]    |        ^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `data` is never read
[INFO] [stdout]    --> src/09_best_practices.rs:158:5
[INFO] [stdout]     |
[INFO] [stdout] 157 | struct TreeNode {
[INFO] [stdout]     |        -------- field in this struct
[INFO] [stdout] 158 |     data: String,
[INFO] [stdout]     |     ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `raw_config` is never read
[INFO] [stdout]    --> src/09_best_practices.rs:210:5
[INFO] [stdout]     |
[INFO] [stdout] 209 | struct AppConfig<'a> {
[INFO] [stdout]     |        --------- field in this struct
[INFO] [stdout] 210 |     raw_config: &'a str,
[INFO] [stdout]     |     ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `count_characters` is never used
[INFO] [stdout]    --> src/09_best_practices.rs:253:8
[INFO] [stdout]     |
[INFO] [stdout] 241 | impl TextProcessor {
[INFO] [stdout]     | ------------------ method in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 253 |     fn count_characters(&self, text: &str) -> std::collections::HashMap<char, usize> {
[INFO] [stdout]     |        ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `clear` is never used
[INFO] [stdout]    --> src/09_best_practices.rs:285:8
[INFO] [stdout]     |
[INFO] [stdout] 266 | impl StringCache {
[INFO] [stdout]     | ---------------- method in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 285 |     fn clear(&mut self) {
[INFO] [stdout]     |        ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `print_best_practices` is never used
[INFO] [stdout]    --> src/09_best_practices.rs:290:4
[INFO] [stdout]     |
[INFO] [stdout] 290 | fn print_best_practices() {
[INFO] [stdout]     |    ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `find_pattern` is never used
[INFO] [stdout]   --> src/06_common_patterns.rs:98:8
[INFO] [stdout]    |
[INFO] [stdout] 86 | impl<'a> SimpleParser<'a> {
[INFO] [stdout]    | ------------------------- method in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 98 |     fn find_pattern(&self, pattern: &str) -> Vec<&'a str> {
[INFO] [stdout]    |        ^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `keys` is never used
[INFO] [stdout]    --> src/06_common_patterns.rs:150:8
[INFO] [stdout]     |
[INFO] [stdout] 133 | impl<'a> Config<'a> {
[INFO] [stdout]     | ------------------- method in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 150 |     fn keys(&self) -> Vec<&'a str> {
[INFO] [stdout]     |        ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `clear` is never used
[INFO] [stdout]    --> src/06_common_patterns.rs:198:8
[INFO] [stdout]     |
[INFO] [stdout] 180 | impl SimpleCache {
[INFO] [stdout]     | ---------------- method in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 198 |     fn clear(&mut self) {
[INFO] [stdout]     |        ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `QueryBuilder` is never constructed
[INFO] [stdout]    --> src/06_common_patterns.rs:203:8
[INFO] [stdout]     |
[INFO] [stdout] 203 | struct QueryBuilder<'a> {
[INFO] [stdout]     |        ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated items `new`, `table`, `where_clause`, `limit`, and `build` are never used
[INFO] [stdout]    --> src/06_common_patterns.rs:210:8
[INFO] [stdout]     |
[INFO] [stdout] 209 | impl<'a> QueryBuilder<'a> {
[INFO] [stdout]     | ------------------------- associated items in this implementation
[INFO] [stdout] 210 |     fn new() -> Self {
[INFO] [stdout]     |        ^^^
[INFO] [stdout] ...
[INFO] [stdout] 218 |     fn table(mut self, table: &'a str) -> Self {
[INFO] [stdout]     |        ^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 223 |     fn where_clause(mut self, condition: &'a str) -> Self {
[INFO] [stdout]     |        ^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 228 |     fn limit(mut self, limit: usize) -> Self {
[INFO] [stdout]     |        ^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 233 |     fn build(&self) -> String {
[INFO] [stdout]     |        ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.32s
[INFO] running `Command { std: "docker" "inspect" "ef9c84e0b0ab351a75025768a582344aca130a9c07250af669ac9d5d9bfb51bd", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ef9c84e0b0ab351a75025768a582344aca130a9c07250af669ac9d5d9bfb51bd", kill_on_drop: false }`
[INFO] [stdout] ef9c84e0b0ab351a75025768a582344aca130a9c07250af669ac9d5d9bfb51bd
[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@sha256:4848fb76d95f26979359cc7e45710b1dbc8f3acb7aeedee7c460d7702230f228" "/opt/rustwide/cargo-home/bin/cargo" "+9f93af291970322f4f1c6315ccde4d7078201159" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 93cf928f2bdd2fa3959511d776b2aa014ab01789f1d920661d6ae6a4d4a4d153
[INFO] running `Command { std: "docker" "start" "-a" "93cf928f2bdd2fa3959511d776b2aa014ab01789f1d920661d6ae6a4d4a4d153", kill_on_drop: false }`
[INFO] [stderr]    Compiling rust-lifetimes-tutorial v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `std::collections::HashMap`
[INFO] [stdout]  --> src/07_advanced_examples.rs:3:5
[INFO] [stdout]   |
[INFO] [stdout] 3 | use std::collections::HashMap;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `first_word_or_default` is never used
[INFO] [stdout]   --> src/02_basic_syntax.rs:46:4
[INFO] [stdout]    |
[INFO] [stdout] 46 | fn first_word_or_default<'a, 'b>(text: &'a str, _default: &'b str) -> &'a str {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `explain_the_error` is never used
[INFO] [stdout]   --> src/03_classic_problem.rs:69:4
[INFO] [stdout]    |
[INFO] [stdout] 69 | fn explain_the_error() {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `dangerous_function` is never used
[INFO] [stdout]   --> src/03_classic_problem.rs:84:4
[INFO] [stdout]    |
[INFO] [stdout] 84 | fn dangerous_function() -> &'static str {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `create_invalid_book` is never used
[INFO] [stdout]    --> src/05_struct_lifetimes.rs:183:4
[INFO] [stdout]     |
[INFO] [stdout] 183 | fn create_invalid_book() -> Book<'static> {
[INFO] [stdout]     |    ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `demonstrate_elision_rules_detailed` is never used
[INFO] [stdout]    --> src/08_lifetime_elision.rs:154:4
[INFO] [stdout]     |
[INFO] [stdout] 154 | fn demonstrate_elision_rules_detailed() {
[INFO] [stdout]     |    ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait `Extractable` is never used
[INFO] [stdout]    --> src/08_lifetime_elision.rs:162:7
[INFO] [stdout]     |
[INFO] [stdout] 162 | trait Extractable {
[INFO] [stdout]     |       ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `keys` is never used
[INFO] [stdout]    --> src/06_common_patterns.rs:150:8
[INFO] [stdout]     |
[INFO] [stdout] 133 | impl<'a> Config<'a> {
[INFO] [stdout]     | ------------------- method in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 150 |     fn keys(&self) -> Vec<&'a str> {
[INFO] [stdout]     |        ^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `clear` is never used
[INFO] [stdout]    --> src/06_common_patterns.rs:198:8
[INFO] [stdout]     |
[INFO] [stdout] 180 | impl SimpleCache {
[INFO] [stdout]     | ---------------- method in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 198 |     fn clear(&mut self) {
[INFO] [stdout]     |        ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `title` and `content` are never read
[INFO] [stdout]   --> src/07_advanced_examples.rs:37:5
[INFO] [stdout]    |
[INFO] [stdout] 36 | struct Book<'a> {
[INFO] [stdout]    |        ---- fields in this struct
[INFO] [stdout] 37 |     title: &'a str,
[INFO] [stdout]    |     ^^^^^
[INFO] [stdout] 38 |     content: &'a str,
[INFO] [stdout]    |     ^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `start_pos` is never read
[INFO] [stdout]   --> src/07_advanced_examples.rs:46:5
[INFO] [stdout]    |
[INFO] [stdout] 43 | struct Chapter<'a> {
[INFO] [stdout]    |        ------- field in this struct
[INFO] [stdout] ...
[INFO] [stdout] 46 |     start_pos: usize,
[INFO] [stdout]    |     ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `name` and `position` are never read
[INFO] [stdout]   --> src/07_advanced_examples.rs:51:5
[INFO] [stdout]    |
[INFO] [stdout] 50 | struct Bookmark<'a> {
[INFO] [stdout]    |        -------- fields in this struct
[INFO] [stdout] 51 |     name: &'a str,
[INFO] [stdout]    |     ^^^^
[INFO] [stdout] 52 |     position: usize,
[INFO] [stdout]    |     ^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Bookmark` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `get_first` is never used
[INFO] [stdout]    --> src/07_advanced_examples.rs:160:8
[INFO] [stdout]     |
[INFO] [stdout] 137 | / impl<'a, T> DataProcessor<'a, T> 
[INFO] [stdout] 138 | | where 
[INFO] [stdout] 139 | |     T: std::fmt::Display + 'a,
[INFO] [stdout]     | |______________________________- method in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 160 |       fn get_first(&self) -> Option<&'a T> {
[INFO] [stdout]     |          ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `id` and `data` are never read
[INFO] [stdout]    --> src/07_advanced_examples.rs:195:5
[INFO] [stdout]     |
[INFO] [stdout] 194 | struct Node<'a> {
[INFO] [stdout]     |        ---- fields in this struct
[INFO] [stdout] 195 |     id: usize,
[INFO] [stdout]     |     ^^
[INFO] [stdout] 196 |     data: &'a str,
[INFO] [stdout]     |     ^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `Node` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `UppercaseProcessor` is never constructed
[INFO] [stdout]    --> src/07_advanced_examples.rs:259:8
[INFO] [stdout]     |
[INFO] [stdout] 259 | struct UppercaseProcessor;
[INFO] [stdout]     |        ^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: methods `get_document` and `get_config` are never used
[INFO] [stdout]   --> src/09_best_practices.rs:72:8
[INFO] [stdout]    |
[INFO] [stdout] 61 | impl<'document, 'config> DocumentParser<'document, 'config> {
[INFO] [stdout]    | ----------------------------------------------------------- methods in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 72 |     fn get_document(&self) -> &'document str {
[INFO] [stdout]    |        ^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 76 |     fn get_config(&self) -> &'config str {
[INFO] [stdout]    |        ^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `data` is never read
[INFO] [stdout]    --> src/09_best_practices.rs:158:5
[INFO] [stdout]     |
[INFO] [stdout] 157 | struct TreeNode {
[INFO] [stdout]     |        -------- field in this struct
[INFO] [stdout] 158 |     data: String,
[INFO] [stdout]     |     ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `raw_config` is never read
[INFO] [stdout]    --> src/09_best_practices.rs:210:5
[INFO] [stdout]     |
[INFO] [stdout] 209 | struct AppConfig<'a> {
[INFO] [stdout]     |        --------- field in this struct
[INFO] [stdout] 210 |     raw_config: &'a str,
[INFO] [stdout]     |     ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `clear` is never used
[INFO] [stdout]    --> src/09_best_practices.rs:285:8
[INFO] [stdout]     |
[INFO] [stdout] 266 | impl StringCache {
[INFO] [stdout]     | ---------------- method in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 285 |     fn clear(&mut self) {
[INFO] [stdout]     |        ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `print_best_practices` is never used
[INFO] [stdout]    --> src/09_best_practices.rs:290:4
[INFO] [stdout]     |
[INFO] [stdout] 290 | fn print_best_practices() {
[INFO] [stdout]     |    ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.36s
[INFO] running `Command { std: "docker" "inspect" "93cf928f2bdd2fa3959511d776b2aa014ab01789f1d920661d6ae6a4d4a4d153", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "93cf928f2bdd2fa3959511d776b2aa014ab01789f1d920661d6ae6a4d4a4d153", kill_on_drop: false }`
[INFO] [stdout] 93cf928f2bdd2fa3959511d776b2aa014ab01789f1d920661d6ae6a4d4a4d153
[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@sha256:4848fb76d95f26979359cc7e45710b1dbc8f3acb7aeedee7c460d7702230f228" "/opt/rustwide/cargo-home/bin/cargo" "+9f93af291970322f4f1c6315ccde4d7078201159" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] 2ef9a92889e9e6838260a37c758aacb5639c47c9159742e59df005f43d1717be
[INFO] running `Command { std: "docker" "start" "-a" "2ef9a92889e9e6838260a37c758aacb5639c47c9159742e59df005f43d1717be", kill_on_drop: false }`
[INFO] [stderr] warning: function `create_invalid_book` is never used
[INFO] [stderr]    --> src/05_struct_lifetimes.rs:183:4
[INFO] [stderr]     |
[INFO] [stderr] 183 | fn create_invalid_book() -> Book<'static> {
[INFO] [stderr]     |    ^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stderr] 
[INFO] [stderr] warning: `rust-lifetimes-tutorial` (bin "struct_lifetimes" test) generated 1 warning
[INFO] [stderr] warning: method `keys` is never used
[INFO] [stderr]    --> src/06_common_patterns.rs:150:8
[INFO] [stderr]     |
[INFO] [stderr] 133 | impl<'a> Config<'a> {
[INFO] [stderr]     | ------------------- method in this implementation
[INFO] [stderr] ...
[INFO] [stderr] 150 |     fn keys(&self) -> Vec<&'a str> {
[INFO] [stderr]     |        ^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stderr] 
[INFO] [stderr] warning: method `clear` is never used
[INFO] [stderr]    --> src/06_common_patterns.rs:198:8
[INFO] [stderr]     |
[INFO] [stderr] 180 | impl SimpleCache {
[INFO] [stderr]     | ---------------- method in this implementation
[INFO] [stderr] ...
[INFO] [stderr] 198 |     fn clear(&mut self) {
[INFO] [stderr]     |        ^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: methods `get_document` and `get_config` are never used
[INFO] [stderr]   --> src/09_best_practices.rs:72:8
[INFO] [stderr]    |
[INFO] [stderr] 61 | impl<'document, 'config> DocumentParser<'document, 'config> {
[INFO] [stderr]    | ----------------------------------------------------------- methods in this implementation
[INFO] [stderr] ...
[INFO] [stderr] 72 |     fn get_document(&self) -> &'document str {
[INFO] [stderr]    |        ^^^^^^^^^^^^
[INFO] [stderr] ...
[INFO] [stderr] 76 |     fn get_config(&self) -> &'config str {
[INFO] [stderr]    |        ^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stderr] 
[INFO] [stderr] warning: field `data` is never read
[INFO] [stderr]    --> src/09_best_practices.rs:158:5
[INFO] [stderr]     |
[INFO] [stderr] 157 | struct TreeNode {
[INFO] [stderr]     |        -------- field in this struct
[INFO] [stderr] 158 |     data: String,
[INFO] [stderr]     |     ^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: field `raw_config` is never read
[INFO] [stderr]    --> src/09_best_practices.rs:210:5
[INFO] [stderr]     |
[INFO] [stderr] 209 | struct AppConfig<'a> {
[INFO] [stderr]     |        --------- field in this struct
[INFO] [stderr] 210 |     raw_config: &'a str,
[INFO] [stderr]     |     ^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method `clear` is never used
[INFO] [stderr]    --> src/09_best_practices.rs:285:8
[INFO] [stderr]     |
[INFO] [stderr] 266 | impl StringCache {
[INFO] [stderr]     | ---------------- method in this implementation
[INFO] [stderr] ...
[INFO] [stderr] 285 |     fn clear(&mut self) {
[INFO] [stderr]     |        ^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `print_best_practices` is never used
[INFO] [stderr]    --> src/09_best_practices.rs:290:4
[INFO] [stderr]     |
[INFO] [stderr] 290 | fn print_best_practices() {
[INFO] [stderr]     |    ^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `first_word_or_default` is never used
[INFO] [stderr]   --> src/02_basic_syntax.rs:46:4
[INFO] [stderr]    |
[INFO] [stderr] 46 | fn first_word_or_default<'a, 'b>(text: &'a str, _default: &'b str) -> &'a str {
[INFO] [stderr]    |    ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::collections::HashMap`
[INFO] [stderr]  --> src/07_advanced_examples.rs:3:5
[INFO] [stderr]   |
[INFO] [stderr] 3 | use std::collections::HashMap;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default
[INFO] [stderr] 
[INFO] [stderr] warning: fields `title` and `content` are never read
[INFO] [stderr]   --> src/07_advanced_examples.rs:37:5
[INFO] [stderr]    |
[INFO] [stderr] 36 | struct Book<'a> {
[INFO] [stderr]    |        ---- fields in this struct
[INFO] [stderr] 37 |     title: &'a str,
[INFO] [stderr]    |     ^^^^^
[INFO] [stderr] 38 |     content: &'a str,
[INFO] [stderr]    |     ^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stderr] 
[INFO] [stderr] warning: field `start_pos` is never read
[INFO] [stderr]   --> src/07_advanced_examples.rs:46:5
[INFO] [stderr]    |
[INFO] [stderr] 43 | struct Chapter<'a> {
[INFO] [stderr]    |        ------- field in this struct
[INFO] [stderr] ...
[INFO] [stderr] 46 |     start_pos: usize,
[INFO] [stderr]    |     ^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: fields `name` and `position` are never read
[INFO] [stderr]   --> src/07_advanced_examples.rs:51:5
[INFO] [stderr]    |
[INFO] [stderr] 50 | struct Bookmark<'a> {
[INFO] [stderr]    |        -------- fields in this struct
[INFO] [stderr] 51 |     name: &'a str,
[INFO] [stderr]    |     ^^^^
[INFO] [stderr] 52 |     position: usize,
[INFO] [stderr]    |     ^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `Bookmark` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stderr] 
[INFO] [stderr] warning: method `get_first` is never used
[INFO] [stderr]    --> src/07_advanced_examples.rs:160:8
[INFO] [stderr]     |
[INFO] [stderr] 137 | / impl<'a, T> DataProcessor<'a, T> 
[INFO] [stderr] 138 | | where 
[INFO] [stderr] 139 | |     T: std::fmt::Display + 'a,
[INFO] [stderr]     | |______________________________- method in this implementation
[INFO] [stderr] ...
[INFO] [stderr] 160 |       fn get_first(&self) -> Option<&'a T> {
[INFO] [stderr]     |          ^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: fields `id` and `data` are never read
[INFO] [stderr]    --> src/07_advanced_examples.rs:195:5
[INFO] [stderr]     |
[INFO] [stderr] 194 | struct Node<'a> {
[INFO] [stderr]     |        ---- fields in this struct
[INFO] [stderr] 195 |     id: usize,
[INFO] [stderr]     |     ^^
[INFO] [stderr] 196 |     data: &'a str,
[INFO] [stderr]     |     ^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: `Node` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stderr] 
[INFO] [stderr] warning: struct `UppercaseProcessor` is never constructed
[INFO] [stderr]    --> src/07_advanced_examples.rs:259:8
[INFO] [stderr]     |
[INFO] [stderr] 259 | struct UppercaseProcessor;
[INFO] [stderr]     |        ^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `demonstrate_elision_rules_detailed` is never used
[INFO] [stderr]    --> src/08_lifetime_elision.rs:154:4
[INFO] [stderr]     |
[INFO] [stderr] 154 | fn demonstrate_elision_rules_detailed() {
[INFO] [stderr]     |    ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stderr] 
[INFO] [stderr] warning: trait `Extractable` is never used
[INFO] [stderr]    --> src/08_lifetime_elision.rs:162:7
[INFO] [stderr]     |
[INFO] [stderr] 162 | trait Extractable {
[INFO] [stderr]     |       ^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `explain_the_error` is never used
[INFO] [stderr]   --> src/03_classic_problem.rs:69:4
[INFO] [stderr]    |
[INFO] [stderr] 69 | fn explain_the_error() {
[INFO] [stderr]    |    ^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stderr] 
[INFO] [stderr] warning: function `dangerous_function` is never used
[INFO] [stderr]   --> src/03_classic_problem.rs:84:4
[INFO] [stderr]    |
[INFO] [stderr] 84 | fn dangerous_function() -> &'static str {
[INFO] [stderr]    |    ^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: `rust-lifetimes-tutorial` (bin "common_patterns" test) generated 2 warnings
[INFO] [stderr] warning: `rust-lifetimes-tutorial` (bin "best_practices" test) generated 5 warnings
[INFO] [stderr] warning: `rust-lifetimes-tutorial` (bin "basic_syntax" test) generated 1 warning
[INFO] [stderr] warning: `rust-lifetimes-tutorial` (bin "advanced_examples" test) generated 7 warnings (run `cargo fix --bin "advanced_examples" -p rust-lifetimes-tutorial --tests` to apply 1 suggestion)
[INFO] [stderr] warning: `rust-lifetimes-tutorial` (bin "lifetime_elision" test) generated 2 warnings
[INFO] [stderr] warning: `rust-lifetimes-tutorial` (bin "classic_problem" test) generated 2 warnings
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.01s
[INFO] [stderr]      Running unittests src/lib.rs (/opt/rustwide/target/debug/deps/rust_lifetimes_tutorial-23720c027aa1c6da)
[INFO] [stdout] 
[INFO] [stdout] running 1 test
[INFO] [stdout] test tests::test_example_longest ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 1 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] [stderr]      Running unittests src/07_advanced_examples.rs (/opt/rustwide/target/debug/deps/advanced_examples-65733a0a74b43f2a)
[INFO] [stdout] 
[INFO] [stdout] running 4 tests
[INFO] [stdout] test tests::test_book_chapters ... ok
[INFO] [stdout] test tests::test_data_processor ... ok
[INFO] [stdout] test tests::test_trait_objects ... ok
[INFO] [stdout] test tests::test_graph ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 4 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] [stderr]      Running unittests src/02_basic_syntax.rs (/opt/rustwide/target/debug/deps/basic_syntax-5f3c7120e1ca3115)
[INFO] [stdout] 
[INFO] [stdout] running 3 tests
[INFO] [stdout] test tests::test_first_word_function ... ok
[INFO] [stdout] test tests::test_lifetime_relationships ... ok
[INFO] [stdout] test tests::test_longest_function ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 3 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] [stderr]      Running unittests src/09_best_practices.rs (/opt/rustwide/target/debug/deps/best_practices-69a4aff5f67e5699)
[INFO] [stdout] 
[INFO] [stdout] running 6 tests
[INFO] [stdout] test tests::test_app_config ... ok
[INFO] [stdout] test tests::test_owned_types ... ok
[INFO] [stdout] test tests::test_simple_tree ... ok
[INFO] [stdout] test tests::test_query_builder ... ok
[INFO] [stdout] test tests::test_string_cache ... ok
[INFO] [stdout] test tests::test_text_processor ... FAILED
[INFO] [stdout] 
[INFO] [stdout] failures:
[INFO] [stdout] 
[INFO] [stdout] ---- tests::test_text_processor stdout ----
[INFO] [stdout] 
[INFO] [stdout] thread 'tests::test_text_processor' (41) panicked at src/09_best_practices.rs:360:9:
[INFO] [stdout] assertion `left == right` failed
[INFO] [stdout]   left: []
[INFO] [stdout]  right: ["hello", "world", "test"]
[INFO] [stdout] stack backtrace:
[INFO] [stdout]    0:     0x64cd23b2b2d2 - std::backtrace_rs::backtrace::libunwind::trace::h16affffe904e891e
[INFO] [stdout]                                at /rustc/9f93af291970322f4f1c6315ccde4d7078201159/library/std/src/../../backtrace/src/backtrace/libunwind.rs:117:9
[INFO] [stdout]    1:     0x64cd23b2b2d2 - std::backtrace_rs::backtrace::trace_unsynchronized::h5c14b13373ed4150
[INFO] [stdout]                                at /rustc/9f93af291970322f4f1c6315ccde4d7078201159/library/std/src/../../backtrace/src/backtrace/mod.rs:66:14
[INFO] [stdout]    2:     0x64cd23b2b2d2 - std::sys::backtrace::_print_fmt::hcbb507f162c816cc
[INFO] [stdout]                                at /rustc/9f93af291970322f4f1c6315ccde4d7078201159/library/std/src/sys/backtrace.rs:66:9
[INFO] [stdout]    3:     0x64cd23b2b2d2 - <std::sys::backtrace::BacktraceLock::print::DisplayBacktrace as core::fmt::Display>::fmt::h8be9aa933f14675f
[INFO] [stdout]                                at /rustc/9f93af291970322f4f1c6315ccde4d7078201159/library/std/src/sys/backtrace.rs:39:26
[INFO] [stdout]    4:     0x64cd23b3bebf - core::fmt::rt::Argument::fmt::h30ed739d33467c3a
[INFO] [stdout]                                at /rustc/9f93af291970322f4f1c6315ccde4d7078201159/library/core/src/fmt/rt.rs:173:76
[INFO] [stdout]    5:     0x64cd23b3bebf - core::fmt::write::hfd0efbb002ac7eea
[INFO] [stdout]                                at /rustc/9f93af291970322f4f1c6315ccde4d7078201159/library/core/src/fmt/mod.rs:1469:25
[INFO] [stdout]    6:     0x64cd23af8da3 - std::io::default_write_fmt::hd6d24501f2d7f8d3
[INFO] [stdout]                                at /rustc/9f93af291970322f4f1c6315ccde4d7078201159/library/std/src/io/mod.rs:639:11
[INFO] [stdout]    7:     0x64cd23af8da3 - std::io::Write::write_fmt::h79eca2f72fc24111
[INFO] [stdout]                                at /rustc/9f93af291970322f4f1c6315ccde4d7078201159/library/std/src/io/mod.rs:1954:13
[INFO] [stdout]    8:     0x64cd23b04b42 - std::sys::backtrace::BacktraceLock::print::hf2554f6030d393f7
[INFO] [stdout]                                at /rustc/9f93af291970322f4f1c6315ccde4d7078201159/library/std/src/sys/backtrace.rs:42:9
[INFO] [stdout]    9:     0x64cd23b0961f - std::panicking::default_hook::{{closure}}::h8873121c56335b01
[INFO] [stdout]                                at /rustc/9f93af291970322f4f1c6315ccde4d7078201159/library/std/src/panicking.rs:301:27
[INFO] [stdout]   10:     0x64cd23b094b1 - std::panicking::default_hook::hbafefc2d196267a2
[INFO] [stdout]                                at /rustc/9f93af291970322f4f1c6315ccde4d7078201159/library/std/src/panicking.rs:325:9
[INFO] [stdout]   11:     0x64cd23acc67e - <alloc::boxed::Box<F,A> as core::ops::function::Fn<Args>>::call::ha834d5846f91b30b
[INFO] [stdout]                                at /rustc/9f93af291970322f4f1c6315ccde4d7078201159/library/alloc/src/boxed.rs:2099:9
[INFO] [stdout]   12:     0x64cd23acc67e - test::test_main_with_exit_callback::{{closure}}::h63c167737eecb025
[INFO] [stdout]                                at /rustc/9f93af291970322f4f1c6315ccde4d7078201159/library/test/src/lib.rs:145:21
[INFO] [stdout]   13:     0x64cd23b09c2f - <alloc::boxed::Box<F,A> as core::ops::function::Fn<Args>>::call::hbf9b0f7a281291fd
[INFO] [stdout]                                at /rustc/9f93af291970322f4f1c6315ccde4d7078201159/library/alloc/src/boxed.rs:2099:9
[INFO] [stdout]   14:     0x64cd23b09c2f - std::panicking::panic_with_hook::h9f5b09d5adc1a745
[INFO] [stdout]                                at /rustc/9f93af291970322f4f1c6315ccde4d7078201159/library/std/src/panicking.rs:842:13
[INFO] [stdout]   15:     0x64cd23b09a8a - std::panicking::panic_handler::{{closure}}::h08111e483bdf6a89
[INFO] [stdout]                                at /rustc/9f93af291970322f4f1c6315ccde4d7078201159/library/std/src/panicking.rs:707:13
[INFO] [stdout]   16:     0x64cd23b04c79 - std::sys::backtrace::__rust_end_short_backtrace::h1b86e3414ecbbe8d
[INFO] [stdout]                                at /rustc/9f93af291970322f4f1c6315ccde4d7078201159/library/std/src/sys/backtrace.rs:174:18
[INFO] [stdout]   17:     0x64cd23aed56d - __rustc[b292c645e8102103]::rust_begin_unwind
[INFO] [stdout]                                at /rustc/9f93af291970322f4f1c6315ccde4d7078201159/library/std/src/panicking.rs:698:5
[INFO] [stdout]   18:     0x64cd23b43c00 - core::panicking::panic_fmt::h31cc490ecc8cc1fa
[INFO] [stdout]                                at /rustc/9f93af291970322f4f1c6315ccde4d7078201159/library/core/src/panicking.rs:80:14
[INFO] [stdout]   19:     0x64cd23b43a03 - core::panicking::assert_failed_inner::h865658b89c1b891d
[INFO] [stdout]                                at /rustc/9f93af291970322f4f1c6315ccde4d7078201159/library/core/src/panicking.rs:444:17
[INFO] [stdout]   20:     0x64cd23aa5b1b - core::panicking::assert_failed::h29c0bb5af7fd03da
[INFO] [stdout]                                at /rustc/9f93af291970322f4f1c6315ccde4d7078201159/library/core/src/panicking.rs:399:5
[INFO] [stdout]   21:     0x64cd23aa3e19 - best_practices::tests::test_text_processor::h92d320d59df8b77f
[INFO] [stdout]                                at /opt/rustwide/workdir/src/09_best_practices.rs:360:9
[INFO] [stdout]   22:     0x64cd23aa3ff7 - best_practices::tests::test_text_processor::{{closure}}::haf74827ceb54dd01
[INFO] [stdout]                                at /opt/rustwide/workdir/src/09_best_practices.rs:355:29
[INFO] [stdout]   23:     0x64cd23a9f5e6 - core::ops::function::FnOnce::call_once::h6d91e780dcde1b4f
[INFO] [stdout]                                at /rustc/9f93af291970322f4f1c6315ccde4d7078201159/library/core/src/ops/function.rs:250:5
[INFO] [stdout]   24:     0x64cd23acc47b - core::ops::function::FnOnce::call_once::h2b2de5fdd23aab3e
[INFO] [stdout]                                at /rustc/9f93af291970322f4f1c6315ccde4d7078201159/library/core/src/ops/function.rs:250:5
[INFO] [stdout]   25:     0x64cd23acc47b - test::__rust_begin_short_backtrace::he551dd004770be01
[INFO] [stdout]                                at /rustc/9f93af291970322f4f1c6315ccde4d7078201159/library/test/src/lib.rs:663:18
[INFO] [stdout]   26:     0x64cd23ae04dd - test::run_test_in_process::{{closure}}::h5f0b44080a35ed87
[INFO] [stdout]                                at /rustc/9f93af291970322f4f1c6315ccde4d7078201159/library/test/src/lib.rs:686:74
[INFO] [stdout]   27:     0x64cd23ae04dd - <core::panic::unwind_safe::AssertUnwindSafe<F> as core::ops::function::FnOnce<()>>::call_once::h4dbf65d14893ecf5
[INFO] [stdout]                                at /rustc/9f93af291970322f4f1c6315ccde4d7078201159/library/core/src/panic/unwind_safe.rs:274:9
[INFO] [stdout]   28:     0x64cd23ae04dd - std::panicking::catch_unwind::do_call::hc37c563b8a006285
[INFO] [stdout]                                at /rustc/9f93af291970322f4f1c6315ccde4d7078201159/library/std/src/panicking.rs:590:40
[INFO] [stdout]   29:     0x64cd23ae04dd - std::panicking::catch_unwind::h616b6e2e7a27f612
[INFO] [stdout]                                at /rustc/9f93af291970322f4f1c6315ccde4d7078201159/library/std/src/panicking.rs:553:19
[INFO] [stdout]   30:     0x64cd23ae04dd - std::panic::catch_unwind::h1e788dd57758e6d8
[INFO] [stdout]                                at /rustc/9f93af291970322f4f1c6315ccde4d7078201159/library/std/src/panic.rs:359:14
[INFO] [stdout]   31:     0x64cd23ae04dd - test::run_test_in_process::hf073c2764f29f8ad
[INFO] [stdout]                                at /rustc/9f93af291970322f4f1c6315ccde4d7078201159/library/test/src/lib.rs:686:27
[INFO] [stdout]   32:     0x64cd23ae04dd - test::run_test::{{closure}}::h3dc46b7a0c340fa6
[INFO] [stdout]                                at /rustc/9f93af291970322f4f1c6315ccde4d7078201159/library/test/src/lib.rs:607:43
[INFO] [stdout]   33:     0x64cd23ab9a24 - test::run_test::{{closure}}::h6a4da3c57ef4505f
[INFO] [stdout]                                at /rustc/9f93af291970322f4f1c6315ccde4d7078201159/library/test/src/lib.rs:637:41
[INFO] [stdout]   34:     0x64cd23ab9a24 - std::sys::backtrace::__rust_begin_short_backtrace::hfd8e44bc311a5d57
[INFO] [stdout]                                at /rustc/9f93af291970322f4f1c6315ccde4d7078201159/library/std/src/sys/backtrace.rs:158:18
[INFO] [stdout]   35:     0x64cd23abd27a - std::thread::Builder::spawn_unchecked_::{{closure}}::{{closure}}::h57c4ddec344fe24c
[INFO] [stdout]                                at /rustc/9f93af291970322f4f1c6315ccde4d7078201159/library/std/src/thread/mod.rs:562:17
[INFO] [stdout]   36:     0x64cd23abd27a - <core::panic::unwind_safe::AssertUnwindSafe<F> as core::ops::function::FnOnce<()>>::call_once::hd7cbe09591f06dfb
[INFO] [stdout]                                at /rustc/9f93af291970322f4f1c6315ccde4d7078201159/library/core/src/panic/unwind_safe.rs:274:9
[INFO] [stdout]   37:     0x64cd23abd27a - std::panicking::catch_unwind::do_call::hdcd076e8e993dfbc
[INFO] [stdout]                                at /rustc/9f93af291970322f4f1c6315ccde4d7078201159/library/std/src/panicking.rs:590:40
[INFO] [stdout]   38:     0x64cd23abd27a - std::panicking::catch_unwind::h8f9f675f3756eab1
[INFO] [stdout]                                at /rustc/9f93af291970322f4f1c6315ccde4d7078201159/library/std/src/panicking.rs:553:19
[INFO] [stdout]   39:     0x64cd23abd27a - std::panic::catch_unwind::he8f74a93abeceb9b
[INFO] [stdout]                                at /rustc/9f93af291970322f4f1c6315ccde4d7078201159/library/std/src/panic.rs:359:14
[INFO] [stdout]   40:     0x64cd23abd27a - std::thread::Builder::spawn_unchecked_::{{closure}}::he43db13a2caa41d5
[INFO] [stdout]                                at /rustc/9f93af291970322f4f1c6315ccde4d7078201159/library/std/src/thread/mod.rs:560:30
[INFO] [stdout]   41:     0x64cd23abd27a - core::ops::function::FnOnce::call_once{{vtable.shim}}::h8f3531a7e0d83514
[INFO] [stdout]                                at /rustc/9f93af291970322f4f1c6315ccde4d7078201159/library/core/src/ops/function.rs:250:5
[INFO] [stdout]   42:     0x64cd23b0007f - <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once::h6ff05134d80ef20e
[INFO] [stdout]                                at /rustc/9f93af291970322f4f1c6315ccde4d7078201159/library/alloc/src/boxed.rs:2085:9
[INFO] [stdout]   43:     0x64cd23b0007f - std::sys::thread::unix::Thread::new::thread_start::h9a4a41a076a486e0
[INFO] [stdout]                                at /rustc/9f93af291970322f4f1c6315ccde4d7078201159/library/std/src/sys/thread/unix.rs:124:17
[INFO] [stdout]   44:     0x7682181efaa4 - <unknown>
[INFO] [stdout]   45:     0x76821827ca64 - clone
[INFO] [stdout]   46:                0x0 - <unknown>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] failures:
[INFO] [stdout]     tests::test_text_processor
[INFO] [stdout] 
[INFO] [stdout] test result: FAILED. 5 passed; 1 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.01s
[INFO] [stdout] 
[INFO] [stderr] error: test failed, to rerun pass `--bin best_practices`
[INFO] running `Command { std: "docker" "inspect" "2ef9a92889e9e6838260a37c758aacb5639c47c9159742e59df005f43d1717be", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "2ef9a92889e9e6838260a37c758aacb5639c47c9159742e59df005f43d1717be", kill_on_drop: false }`
[INFO] [stdout] 2ef9a92889e9e6838260a37c758aacb5639c47c9159742e59df005f43d1717be
