[INFO] cloning repository https://github.com/HannanKan/rust-by-example [INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/HannanKan/rust-by-example" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FHannanKan%2Frust-by-example", kill_on_drop: false }` [INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FHannanKan%2Frust-by-example'... 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[INFO] [stdout] | --- ^^^^^ [INFO] [stdout] | | [INFO] [stdout] | field in this struct [INFO] [stdout] | [INFO] [stdout] = help: consider removing this field [INFO] [stdout] = note: `Ref` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis [INFO] [stdout] = note: `#[warn(dead_code)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: 1 warning emitted [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: 1 warning emitted [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: variant `Subtract` is never constructed [INFO] [stdout] --> src/bin/3_2_class_alias.rs:4:5 [INFO] [stdout] | [INFO] [stdout] 2 | enum VeryVerboseEnumOfThingsToDoWithNumbers { [INFO] [stdout] | -------------------------------------- variant in this enum [INFO] [stdout] 3 | Add, [INFO] [stdout] 4 | Subtract, [INFO] [stdout] | ^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `VeryVerboseEnumOfThingsToDoWithNumbers` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis [INFO] [stdout] = note: `#[warn(dead_code)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: 1 warning emitted [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: field `0` is never read [INFO] [stdout] --> src/bin/1_2_1_debug.rs:4:18 [INFO] [stdout] | [INFO] [stdout] 4 | struct Structure(i32); [INFO] [stdout] | --------- ^^^ [INFO] [stdout] | | [INFO] [stdout] | field in this struct [INFO] [stdout] | [INFO] [stdout] = help: consider removing this field [INFO] [stdout] = note: `Structure` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis [INFO] [stdout] = note: `#[warn(dead_code)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: field `0` is never read [INFO] [stdout] --> src/bin/1_2_1_debug.rs:8:13 [INFO] [stdout] | [INFO] [stdout] 8 | struct Deep(Structure); [INFO] [stdout] | ---- ^^^^^^^^^ [INFO] [stdout] | | [INFO] [stdout] | field in this struct [INFO] [stdout] | [INFO] [stdout] = help: consider removing this field [INFO] [stdout] = note: `Deep` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: 2 warnings emitted [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: field `0` is never read [INFO] [stdout] --> src/bin/16_1_derive.rs:18:16 [INFO] [stdout] | [INFO] [stdout] 18 | struct Seconds(i32); [INFO] [stdout] | ------- ^^^ [INFO] [stdout] | | [INFO] [stdout] | field in this struct [INFO] [stdout] | [INFO] [stdout] = help: consider removing this field [INFO] [stdout] = note: `#[warn(dead_code)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: 1 warning emitted [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: field `number` is never read [INFO] [stdout] --> src/bin/18_2_1_unpacking_option.rs:13:5 [INFO] [stdout] | [INFO] [stdout] 11 | struct PhoneNumber { [INFO] [stdout] | ----------- field in this struct [INFO] [stdout] 12 | area_code: Option, [INFO] [stdout] 13 | number: u32, [INFO] [stdout] | ^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `PhoneNumber` has a derived impl for the trait `Clone`, but this is intentionally ignored during dead code analysis [INFO] [stdout] = note: `#[warn(dead_code)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: 1 warning emitted [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: trait `Person` is never used [INFO] [stdout] --> src/bin/16_8_parent_trait.rs:1:7 [INFO] [stdout] | [INFO] [stdout] 1 | trait Person { [INFO] [stdout] | ^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(dead_code)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: trait `Student` is never used [INFO] [stdout] --> src/bin/16_8_parent_trait.rs:7:7 [INFO] [stdout] | [INFO] [stdout] 7 | trait Student: Person { [INFO] [stdout] | ^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: trait `Programmer` is never used [INFO] [stdout] --> src/bin/16_8_parent_trait.rs:11:7 [INFO] [stdout] | [INFO] [stdout] 11 | trait Programmer { [INFO] [stdout] | ^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: trait `CompSciStudent` is never used [INFO] [stdout] --> src/bin/16_8_parent_trait.rs:17:7 [INFO] [stdout] | [INFO] [stdout] 17 | trait CompSciStudent: Programmer + Student { [INFO] [stdout] | ^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `comp_sci_student_greeting` is never used [INFO] [stdout] --> src/bin/16_8_parent_trait.rs:21:4 [INFO] [stdout] | [INFO] [stdout] 21 | fn comp_sci_student_greeting(student: &dyn CompSciStudent) -> String { [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: field `0` is never read [INFO] [stdout] --> src/bin/15_4_4_lifetime_struct.rs:4:21 [INFO] [stdout] | [INFO] [stdout] 4 | struct Borrowed<'a>(&'a i32); [INFO] [stdout] | -------- ^^^^^^^ [INFO] [stdout] | | [INFO] [stdout] | field in this struct [INFO] [stdout] | [INFO] [stdout] = help: consider removing this field [INFO] [stdout] = note: `Borrowed` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis [INFO] [stdout] = note: `#[warn(dead_code)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: fields `x` and `y` are never read [INFO] [stdout] --> src/bin/15_4_4_lifetime_struct.rs:9:5 [INFO] [stdout] | [INFO] [stdout] 8 | struct NamedBorrowed<'a> { [INFO] [stdout] | ------------- fields in this struct [INFO] [stdout] 9 | x: &'a i32, [INFO] [stdout] | ^ [INFO] [stdout] 10 | y: &'a i32, [INFO] [stdout] | ^ [INFO] [stdout] | [INFO] [stdout] = note: `NamedBorrowed` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: field `x` is never read [INFO] [stdout] --> src/bin/15_4_5_lifetime_trait.rs:4:6 [INFO] [stdout] | [INFO] [stdout] 3 | struct Borrowed<'a> { [INFO] [stdout] | -------- field in this struct [INFO] [stdout] 4 | x: &'a i32, [INFO] [stdout] | ^ [INFO] [stdout] | [INFO] [stdout] = note: `Borrowed` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis [INFO] [stdout] = note: `#[warn(dead_code)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: field `0` is never read [INFO] [stdout] --> src/bin/15_4_4_lifetime_struct.rs:16:9 [INFO] [stdout] | [INFO] [stdout] 16 | Num(i32), [INFO] [stdout] | --- ^^^ [INFO] [stdout] | | [INFO] [stdout] | field in this variant [INFO] [stdout] | [INFO] [stdout] = note: `Either` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis [INFO] [stdout] help: consider changing the field to be of unit type to suppress this warning while preserving the field numbering, or remove the field [INFO] [stdout] | [INFO] [stdout] 16 | Num(()), [INFO] [stdout] | ~~ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: field `0` is never read [INFO] [stdout] --> src/bin/15_4_4_lifetime_struct.rs:17:9 [INFO] [stdout] | [INFO] [stdout] 17 | Ref(&'a i32), [INFO] [stdout] | --- ^^^^^^^ [INFO] [stdout] | | [INFO] [stdout] | field in this variant [INFO] [stdout] | [INFO] [stdout] = note: `Either` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis [INFO] [stdout] help: consider changing the field to be of unit type to suppress this warning while preserving the field numbering, or remove the field [INFO] [stdout] | [INFO] [stdout] 17 | Ref(()), [INFO] [stdout] | ~~ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: 5 warnings emitted [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: 1 warning emitted [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: trait `Person` is never used [INFO] [stdout] --> src/bin/16_8_parent_trait.rs:1:7 [INFO] [stdout] | [INFO] [stdout] 1 | trait Person { [INFO] [stdout] | ^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(dead_code)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: trait `Student` is never used [INFO] [stdout] --> src/bin/16_8_parent_trait.rs:7:7 [INFO] [stdout] | [INFO] [stdout] 7 | trait Student: Person { [INFO] [stdout] | ^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: trait `Programmer` is never used [INFO] [stdout] --> src/bin/16_8_parent_trait.rs:11:7 [INFO] [stdout] | [INFO] [stdout] 11 | trait Programmer { [INFO] [stdout] | ^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: trait `CompSciStudent` is never used [INFO] [stdout] --> src/bin/16_8_parent_trait.rs:17:7 [INFO] [stdout] | [INFO] [stdout] 17 | trait CompSciStudent: Programmer + Student { [INFO] [stdout] | ^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `comp_sci_student_greeting` is never used [INFO] [stdout] --> src/bin/16_8_parent_trait.rs:21:4 [INFO] [stdout] | [INFO] [stdout] 21 | fn comp_sci_student_greeting(student: &dyn CompSciStudent) -> String { [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: 4 warnings emitted [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused label [INFO] [stdout] --> src/bin/8_2_1_nestloop_tag.rs:7:9 [INFO] [stdout] | [INFO] [stdout] 7 | 'inner: loop { [INFO] [stdout] | ^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_labels)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: 5 warnings emitted [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `display` [INFO] [stdout] --> src/bin/20_3_path.rs:8:9 [INFO] [stdout] | [INFO] [stdout] 8 | let display = path.display(); [INFO] [stdout] | ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_display` [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_variables)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: 1 warning emitted [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: 1 warning emitted [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `my_string` [INFO] [stdout] --> src/bin/6_1_From_to.rs:20:9 [INFO] [stdout] | [INFO] [stdout] 20 | let my_string = String::from(my_str); [INFO] [stdout] | ^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_my_string` [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_variables)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: field `value` is never read [INFO] [stdout] --> src/bin/6_1_From_to.rs:5:5 [INFO] [stdout] | [INFO] [stdout] 4 | struct Number { [INFO] [stdout] | ------ field in this struct [INFO] [stdout] 5 | value: i32, [INFO] [stdout] | ^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `Number` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis [INFO] [stdout] = note: `#[warn(dead_code)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: 2 warnings emitted [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: field `number` is never read [INFO] [stdout] --> src/bin/18_2_1_unpacking_option.rs:13:5 [INFO] [stdout] | [INFO] [stdout] 11 | struct PhoneNumber { [INFO] [stdout] | ----------- field in this struct [INFO] [stdout] 12 | area_code: Option, [INFO] [stdout] 13 | number: u32, [INFO] [stdout] | ^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `PhoneNumber` has a derived impl for the trait `Clone`, but this is intentionally ignored during dead code analysis [INFO] [stdout] = note: `#[warn(dead_code)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: 1 warning emitted [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: field `0` is never read [INFO] [stdout] --> src/bin/15_4_6_lifetime_constraint.rs:4:23 [INFO] [stdout] | [INFO] [stdout] 4 | struct Ref<'a, T: 'a>(&'a T); [INFO] [stdout] | --- ^^^^^ [INFO] [stdout] | | [INFO] [stdout] | field in this struct [INFO] [stdout] | [INFO] [stdout] = help: consider removing this field [INFO] [stdout] = note: `Ref` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis [INFO] [stdout] = note: `#[warn(dead_code)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: 1 warning emitted [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: variant `Subtract` is never constructed [INFO] [stdout] --> src/bin/3_2_class_alias.rs:4:5 [INFO] [stdout] | [INFO] [stdout] 2 | enum VeryVerboseEnumOfThingsToDoWithNumbers { [INFO] [stdout] | -------------------------------------- variant in this enum [INFO] [stdout] 3 | Add, [INFO] [stdout] 4 | Subtract, [INFO] [stdout] | ^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `VeryVerboseEnumOfThingsToDoWithNumbers` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis [INFO] [stdout] = note: `#[warn(dead_code)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused arithmetic operation that must be used [INFO] [stdout] --> src/bin/7_expression.rs:14:9 [INFO] [stdout] | [INFO] [stdout] 14 | 2 * x; [INFO] [stdout] | ^^^^^ the arithmetic operation produces a value [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_must_use)]` on by default [INFO] [stdout] help: use `let _ = ...` to ignore the resulting value [INFO] [stdout] | [INFO] [stdout] 14 | let _ = 2 * x; [INFO] [stdout] | +++++++ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: 1 warning emitted [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: 1 warning emitted [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: fields `name` and `age` are never read [INFO] [stdout] --> src/bin/3_1_struct.rs:3:5 [INFO] [stdout] | [INFO] [stdout] 2 | struct Person { [INFO] [stdout] | ------ fields in this struct [INFO] [stdout] 3 | name: String, [INFO] [stdout] | ^^^^ [INFO] [stdout] 4 | age: u8, [INFO] [stdout] | ^^^ [INFO] [stdout] | [INFO] [stdout] = note: `Person` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis [INFO] [stdout] = note: `#[warn(dead_code)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: 1 warning emitted [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] error: this value of type `ChildStdout` has significant drop implementation that will have a different drop order from that of Edition 2021 [INFO] [stdout] --> src/bin/20_5_1_subprocess_channel.rs:32:11 [INFO] [stdout] | [INFO] [stdout] 9 | let process = match Command::new("wc") [INFO] [stdout] | ------- these local bindings with significant drop implementation may observe changes in drop order under Edition 2024 [INFO] [stdout] ... [INFO] [stdout] 32 | match process.stdout.unwrap().read_to_string(&mut s) { [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = warning: this changes meaning in Rust 2024 [INFO] [stdout] = note: for more information, see issue #123739 [INFO] [stdout] = note: requested on the command line with `-D tail-expr-drop-order` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] error: aborting due to 1 previous error [INFO] [stdout] [INFO] [stdout] [INFO] [stderr] error: could not compile `rust-by-example` (bin "20_5_1_subprocess_channel" test) due to 2 previous errors [INFO] [stderr] warning: build failed, waiting for other jobs to finish... [INFO] [stdout] warning: unused variable: `quotes` [INFO] [stdout] --> src/bin/19_3_String.rs:95:9 [INFO] [stdout] | [INFO] [stdout] 95 | let quotes = br#"You can also use "fancier" formatting, \ [INFO] [stdout] | ^^^^^^ help: if this is intentional, prefix it with an underscore: `_quotes` [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_variables)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: calls to `std::str::from_utf8` with a invalid literal always return an error [INFO] [stdout] --> src/bin/19_3_String.rs:102:11 [INFO] [stdout] | [INFO] [stdout] 99 | let shift_jis = b"\x82\xe6\x82\xa8\x82\xb1\x82"; // SHIFT-JIS 编码的 "ようこそ" [INFO] [stdout] | ------------------------------- the literal was valid UTF-8 up to the 0 bytes [INFO] [stdout] ... [INFO] [stdout] 102 | match str::from_utf8(shift_jis) { [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(invalid_from_utf8)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: field `0` is never read [INFO] [stdout] --> src/bin/1_2_1_debug.rs:4:18 [INFO] [stdout] | [INFO] [stdout] 4 | struct Structure(i32); [INFO] [stdout] | --------- ^^^ [INFO] [stdout] | | [INFO] [stdout] | field in this struct [INFO] [stdout] | [INFO] [stdout] = help: consider removing this field [INFO] [stdout] = note: `Structure` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis [INFO] [stdout] = note: `#[warn(dead_code)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: 2 warnings emitted [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: field `0` is never read [INFO] [stdout] --> src/bin/1_2_1_debug.rs:8:13 [INFO] [stdout] | [INFO] [stdout] 8 | struct Deep(Structure); [INFO] [stdout] | ---- ^^^^^^^^^ [INFO] [stdout] | | [INFO] [stdout] | field in this struct [INFO] [stdout] | [INFO] [stdout] = help: consider removing this field [INFO] [stdout] = note: `Deep` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: 2 warnings emitted [INFO] [stdout] [INFO] [stdout] [INFO] running `Command { std: "docker" "inspect" "cf54c6cf23544e20661d0ed1c22cc739964ad1c124f0999196cb3e15a38b33ef", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "cf54c6cf23544e20661d0ed1c22cc739964ad1c124f0999196cb3e15a38b33ef", kill_on_drop: false }` [INFO] [stdout] cf54c6cf23544e20661d0ed1c22cc739964ad1c124f0999196cb3e15a38b33ef