[INFO] cloning repository https://github.com/woodrow-wong/LinkListTest [INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/woodrow-wong/LinkListTest" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fwoodrow-wong%2FLinkListTest", kill_on_drop: false }` [INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fwoodrow-wong%2FLinkListTest'... [INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }` [INFO] [stdout] f7c7ca3e45df86b306287bb20eaac06e91917f8f [INFO] checking woodrow-wong/LinkListTest against try#2b43d8e161cfe46fae25518efb124c3c1d0fa392 for pr-145604 [INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fwoodrow-wong%2FLinkListTest" "/workspace/builds/worker-2-tc2/source", kill_on_drop: false }` [INFO] [stderr] Cloning into '/workspace/builds/worker-2-tc2/source'... [INFO] [stderr] done. [INFO] started tweaking git repo https://github.com/woodrow-wong/LinkListTest [INFO] finished tweaking git repo https://github.com/woodrow-wong/LinkListTest [INFO] tweaked toml for git repo https://github.com/woodrow-wong/LinkListTest written to /workspace/builds/worker-2-tc2/source/Cargo.toml [INFO] validating manifest of git repo https://github.com/woodrow-wong/LinkListTest on toolchain 2b43d8e161cfe46fae25518efb124c3c1d0fa392 [INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+2b43d8e161cfe46fae25518efb124c3c1d0fa392" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }` [INFO] crate git repo https://github.com/woodrow-wong/LinkListTest 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" "+2b43d8e161cfe46fae25518efb124c3c1d0fa392" "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] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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@sha256:7ad1b28ee6f5f7f699f6cf7015098d6ccdd96d6f2d78dd06228f5b4c9faf309c" "/opt/rustwide/cargo-home/bin/cargo" "+2b43d8e161cfe46fae25518efb124c3c1d0fa392" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }` [INFO] [stdout] 6dc58a24c3667618082b20a1a53f89087ce9e5846fc39353606c4355ea811f31 [INFO] running `Command { std: "docker" "start" "-a" "6dc58a24c3667618082b20a1a53f89087ce9e5846fc39353606c4355ea811f31", kill_on_drop: false }` [INFO] running `Command { std: "docker" "inspect" "6dc58a24c3667618082b20a1a53f89087ce9e5846fc39353606c4355ea811f31", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "6dc58a24c3667618082b20a1a53f89087ce9e5846fc39353606c4355ea811f31", kill_on_drop: false }` [INFO] [stdout] 6dc58a24c3667618082b20a1a53f89087ce9e5846fc39353606c4355ea811f31 [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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@sha256:7ad1b28ee6f5f7f699f6cf7015098d6ccdd96d6f2d78dd06228f5b4c9faf309c" "/opt/rustwide/cargo-home/bin/cargo" "+2b43d8e161cfe46fae25518efb124c3c1d0fa392" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }` [INFO] [stdout] a2e2e591f306a6b6381fbf7654303cb802a7958656bee7122c65564da3ecc9d3 [INFO] running `Command { std: "docker" "start" "-a" "a2e2e591f306a6b6381fbf7654303cb802a7958656bee7122c65564da3ecc9d3", kill_on_drop: false }` [INFO] [stderr] Checking rlist v0.1.0 (/opt/rustwide/workdir) [INFO] [stdout] warning: field `0` is never read [INFO] [stdout] --> src/fourth.rs:145:24 [INFO] [stdout] | [INFO] [stdout] 145 | pub struct Iter<'a, T>(Option>>); [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: hiding a lifetime that's elided elsewhere is confusing [INFO] [stdout] --> src/fourth.rs:66:23 [INFO] [stdout] | [INFO] [stdout] 66 | pub fn peek_front(&self) -> Option> { [INFO] [stdout] | ^^^^^ ------ the same lifetime is hidden here [INFO] [stdout] | | [INFO] [stdout] | the lifetime is elided here [INFO] [stdout] | [INFO] [stdout] = help: the same lifetime is referred to in inconsistent ways, making the signature confusing [INFO] [stdout] = note: `#[warn(mismatched_lifetime_syntaxes)]` on by default [INFO] [stdout] help: use `'_` for type paths [INFO] [stdout] | [INFO] [stdout] 66 | pub fn peek_front(&self) -> Option> { [INFO] [stdout] | +++ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing [INFO] [stdout] --> src/fourth.rs:102:22 [INFO] [stdout] | [INFO] [stdout] 102 | pub fn peek_back(&self) -> Option> { [INFO] [stdout] | ^^^^^ ------ the same lifetime is hidden here [INFO] [stdout] | | [INFO] [stdout] | the lifetime is elided here [INFO] [stdout] | [INFO] [stdout] = help: the same lifetime is referred to in inconsistent ways, making the signature confusing [INFO] [stdout] help: use `'_` for type paths [INFO] [stdout] | [INFO] [stdout] 102 | pub fn peek_back(&self) -> Option> { [INFO] [stdout] | +++ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing [INFO] [stdout] --> src/fourth.rs:108:26 [INFO] [stdout] | [INFO] [stdout] 108 | pub fn peek_back_mut(&mut self) -> Option> { [INFO] [stdout] | ^^^^^^^^^ --------- the same lifetime is hidden here [INFO] [stdout] | | [INFO] [stdout] | the lifetime is elided here [INFO] [stdout] | [INFO] [stdout] = help: the same lifetime is referred to in inconsistent ways, making the signature confusing [INFO] [stdout] help: use `'_` for type paths [INFO] [stdout] | [INFO] [stdout] 108 | pub fn peek_back_mut(&mut self) -> Option> { [INFO] [stdout] | +++ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing [INFO] [stdout] --> src/fourth.rs:114:27 [INFO] [stdout] | [INFO] [stdout] 114 | pub fn peek_front_mut(&mut self) -> Option> { [INFO] [stdout] | ^^^^^^^^^ --------- the same lifetime is hidden here [INFO] [stdout] | | [INFO] [stdout] | the lifetime is elided here [INFO] [stdout] | [INFO] [stdout] = help: the same lifetime is referred to in inconsistent ways, making the signature confusing [INFO] [stdout] help: use `'_` for type paths [INFO] [stdout] | [INFO] [stdout] 114 | pub fn peek_front_mut(&mut self) -> Option> { [INFO] [stdout] | +++ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing [INFO] [stdout] --> src/fourth.rs:148:17 [INFO] [stdout] | [INFO] [stdout] 148 | pub fn iter(&self) -> Iter { [INFO] [stdout] | ^^^^^ ------- the same lifetime is hidden here [INFO] [stdout] | | [INFO] [stdout] | the lifetime is elided here [INFO] [stdout] | [INFO] [stdout] = help: the same lifetime is referred to in inconsistent ways, making the signature confusing [INFO] [stdout] help: use `'_` for type paths [INFO] [stdout] | [INFO] [stdout] 148 | pub fn iter(&self) -> Iter<'_, T> { [INFO] [stdout] | +++ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: field `0` is never read [INFO] [stdout] --> src/fourth.rs:145:24 [INFO] [stdout] | [INFO] [stdout] 145 | pub struct Iter<'a, T>(Option>>); [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: enum `List` is never used [INFO] [stdout] --> src/bin/weak_try.rs:6:6 [INFO] [stdout] | [INFO] [stdout] 6 | enum List { [INFO] [stdout] | ^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(dead_code)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: method `tail` is never used [INFO] [stdout] --> src/bin/weak_try.rs:12:8 [INFO] [stdout] | [INFO] [stdout] 11 | impl List { [INFO] [stdout] | --------- method in this implementation [INFO] [stdout] 12 | fn tail(&self) -> Option<&RefCell>> { [INFO] [stdout] | ^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `is_even` is never used [INFO] [stdout] --> src/bin/cell_try.rs:108:4 [INFO] [stdout] | [INFO] [stdout] 108 | fn is_even(i: i32) -> bool { [INFO] [stdout] | ^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(dead_code)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `retain_even` is never used [INFO] [stdout] --> src/bin/cell_try.rs:132:4 [INFO] [stdout] | [INFO] [stdout] 132 | fn retain_even(nums: &mut Vec) { [INFO] [stdout] | ^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: field `name` is never read [INFO] [stdout] --> src/bin/cell_try.rs:152:5 [INFO] [stdout] | [INFO] [stdout] 150 | struct Person { [INFO] [stdout] | ------ field in this struct [INFO] [stdout] 151 | // 一个人的名字从出生就决定了（不提供后续修改） [INFO] [stdout] 152 | name: String, [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] [INFO] [stdout] [INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing [INFO] [stdout] --> src/fourth.rs:66:23 [INFO] [stdout] | [INFO] [stdout] 66 | pub fn peek_front(&self) -> Option> { [INFO] [stdout] | ^^^^^ ------ the same lifetime is hidden here [INFO] [stdout] | | [INFO] [stdout] | the lifetime is elided here [INFO] [stdout] | [INFO] [stdout] = help: the same lifetime is referred to in inconsistent ways, making the signature confusing [INFO] [stdout] = note: `#[warn(mismatched_lifetime_syntaxes)]` on by default [INFO] [stdout] help: use `'_` for type paths [INFO] [stdout] | [INFO] [stdout] 66 | pub fn peek_front(&self) -> Option> { [INFO] [stdout] | +++ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing [INFO] [stdout] --> src/fourth.rs:102:22 [INFO] [stdout] | [INFO] [stdout] 102 | pub fn peek_back(&self) -> Option> { [INFO] [stdout] | ^^^^^ ------ the same lifetime is hidden here [INFO] [stdout] | | [INFO] [stdout] | the lifetime is elided here [INFO] [stdout] | [INFO] [stdout] = help: the same lifetime is referred to in inconsistent ways, making the signature confusing [INFO] [stdout] help: use `'_` for type paths [INFO] [stdout] | [INFO] [stdout] 102 | pub fn peek_back(&self) -> Option> { [INFO] [stdout] | +++ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing [INFO] [stdout] --> src/fourth.rs:108:26 [INFO] [stdout] | [INFO] [stdout] 108 | pub fn peek_back_mut(&mut self) -> Option> { [INFO] [stdout] | ^^^^^^^^^ --------- the same lifetime is hidden here [INFO] [stdout] | | [INFO] [stdout] | the lifetime is elided here [INFO] [stdout] | [INFO] [stdout] = help: the same lifetime is referred to in inconsistent ways, making the signature confusing [INFO] [stdout] help: use `'_` for type paths [INFO] [stdout] | [INFO] [stdout] 108 | pub fn peek_back_mut(&mut self) -> Option> { [INFO] [stdout] | +++ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing [INFO] [stdout] --> src/fourth.rs:114:27 [INFO] [stdout] | [INFO] [stdout] 114 | pub fn peek_front_mut(&mut self) -> Option> { [INFO] [stdout] | ^^^^^^^^^ --------- the same lifetime is hidden here [INFO] [stdout] | | [INFO] [stdout] | the lifetime is elided here [INFO] [stdout] | [INFO] [stdout] = help: the same lifetime is referred to in inconsistent ways, making the signature confusing [INFO] [stdout] help: use `'_` for type paths [INFO] [stdout] | [INFO] [stdout] 114 | pub fn peek_front_mut(&mut self) -> Option> { [INFO] [stdout] | +++ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing [INFO] [stdout] --> src/fourth.rs:148:17 [INFO] [stdout] | [INFO] [stdout] 148 | pub fn iter(&self) -> Iter { [INFO] [stdout] | ^^^^^ ------- the same lifetime is hidden here [INFO] [stdout] | | [INFO] [stdout] | the lifetime is elided here [INFO] [stdout] | [INFO] [stdout] = help: the same lifetime is referred to in inconsistent ways, making the signature confusing [INFO] [stdout] help: use `'_` for type paths [INFO] [stdout] | [INFO] [stdout] 148 | pub fn iter(&self) -> Iter<'_, T> { [INFO] [stdout] | +++ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `b` [INFO] [stdout] --> src/main.rs:3:9 [INFO] [stdout] | [INFO] [stdout] 3 | let b=&a[1..4]; [INFO] [stdout] | ^ help: if this is intentional, prefix it with an underscore: `_b` [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_variables)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `c` [INFO] [stdout] --> src/main.rs:4:9 [INFO] [stdout] | [INFO] [stdout] 4 | let c=a.as_bytes(); [INFO] [stdout] | ^ help: if this is intentional, prefix it with an underscore: `_c` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: enum `List` is never used [INFO] [stdout] --> src/bin/weak_try.rs:6:6 [INFO] [stdout] | [INFO] [stdout] 6 | enum List { [INFO] [stdout] | ^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(dead_code)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: method `tail` is never used [INFO] [stdout] --> src/bin/weak_try.rs:12:8 [INFO] [stdout] | [INFO] [stdout] 11 | impl List { [INFO] [stdout] | --------- method in this implementation [INFO] [stdout] 12 | fn tail(&self) -> Option<&RefCell>> { [INFO] [stdout] | ^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: variants `A` and `B` are never constructed [INFO] [stdout] --> src/bin/enum_try.rs:4:5 [INFO] [stdout] | [INFO] [stdout] 3 | enum Regular { [INFO] [stdout] | ------- variants in this enum [INFO] [stdout] 4 | A, [INFO] [stdout] | ^ [INFO] [stdout] 5 | B(u32), // 常规数据类型 [INFO] [stdout] | ^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(dead_code)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: variants `A` and `B` are never constructed [INFO] [stdout] --> src/bin/enum_try.rs:9:5 [INFO] [stdout] | [INFO] [stdout] 8 | enum Optimized { [INFO] [stdout] | --------- variants in this enum [INFO] [stdout] 9 | A, [INFO] [stdout] | ^ [INFO] [stdout] 10 | B(Box), // 非空指针类型 [INFO] [stdout] | ^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `b` [INFO] [stdout] --> src/main.rs:3:9 [INFO] [stdout] | [INFO] [stdout] 3 | let b=&a[1..4]; [INFO] [stdout] | ^ help: if this is intentional, prefix it with an underscore: `_b` [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_variables)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: fields `value` and `children` are never read [INFO] [stdout] --> src/bin/weak_try3.rs:6:5 [INFO] [stdout] | [INFO] [stdout] 5 | struct Node { [INFO] [stdout] | ---- fields in this struct [INFO] [stdout] 6 | value: i32, [INFO] [stdout] | ^^^^^ [INFO] [stdout] 7 | parent: RefCell>, [INFO] [stdout] 8 | children: RefCell>>, [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] = note: `#[warn(dead_code)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `c` [INFO] [stdout] --> src/main.rs:4:9 [INFO] [stdout] | [INFO] [stdout] 4 | let c=a.as_bytes(); [INFO] [stdout] | ^ help: if this is intentional, prefix it with an underscore: `_c` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: variants `A` and `B` are never constructed [INFO] [stdout] --> src/bin/enum_try.rs:4:5 [INFO] [stdout] | [INFO] [stdout] 3 | enum Regular { [INFO] [stdout] | ------- variants in this enum [INFO] [stdout] 4 | A, [INFO] [stdout] | ^ [INFO] [stdout] 5 | B(u32), // 常规数据类型 [INFO] [stdout] | ^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(dead_code)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: variants `A` and `B` are never constructed [INFO] [stdout] --> src/bin/enum_try.rs:9:5 [INFO] [stdout] | [INFO] [stdout] 8 | enum Optimized { [INFO] [stdout] | --------- variants in this enum [INFO] [stdout] 9 | A, [INFO] [stdout] | ^ [INFO] [stdout] 10 | B(Box), // 非空指针类型 [INFO] [stdout] | ^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: fields `value` and `children` are never read [INFO] [stdout] --> src/bin/weak_try3.rs:6:5 [INFO] [stdout] | [INFO] [stdout] 5 | struct Node { [INFO] [stdout] | ---- fields in this struct [INFO] [stdout] 6 | value: i32, [INFO] [stdout] | ^^^^^ [INFO] [stdout] 7 | parent: RefCell>, [INFO] [stdout] 8 | children: RefCell>>, [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] = note: `#[warn(dead_code)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `is_even` is never used [INFO] [stdout] --> src/bin/cell_try.rs:108:4 [INFO] [stdout] | [INFO] [stdout] 108 | fn is_even(i: i32) -> bool { [INFO] [stdout] | ^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(dead_code)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `retain_even` is never used [INFO] [stdout] --> src/bin/cell_try.rs:132:4 [INFO] [stdout] | [INFO] [stdout] 132 | fn retain_even(nums: &mut Vec) { [INFO] [stdout] | ^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: field `name` is never read [INFO] [stdout] --> src/bin/cell_try.rs:152:5 [INFO] [stdout] | [INFO] [stdout] 150 | struct Person { [INFO] [stdout] | ------ field in this struct [INFO] [stdout] 151 | // 一个人的名字从出生就决定了（不提供后续修改） [INFO] [stdout] 152 | name: String, [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] [INFO] [stdout] [INFO] [stderr] Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.50s [INFO] running `Command { std: "docker" "inspect" "a2e2e591f306a6b6381fbf7654303cb802a7958656bee7122c65564da3ecc9d3", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "a2e2e591f306a6b6381fbf7654303cb802a7958656bee7122c65564da3ecc9d3", kill_on_drop: false }` [INFO] [stdout] a2e2e591f306a6b6381fbf7654303cb802a7958656bee7122c65564da3ecc9d3