[INFO] cloning repository https://github.com/Timtangxi/rust_thread [INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/Timtangxi/rust_thread" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FTimtangxi%2Frust_thread", kill_on_drop: false }` [INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FTimtangxi%2Frust_thread'... [INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }` [INFO] [stdout] 6e02aee54d43b40dcc306bb637156f3a0497799b [INFO] building Timtangxi/rust_thread against master#11663cd3bfefef7d34e8f0892c250bf698049392+rustflags=-Dtail-expr-drop-order for pr-134523 [INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FTimtangxi%2Frust_thread" "/workspace/builds/worker-7-tc1/source", kill_on_drop: false }` [INFO] [stderr] Cloning into '/workspace/builds/worker-7-tc1/source'... [INFO] [stderr] done. [INFO] validating manifest of git repo https://github.com/Timtangxi/rust_thread on toolchain 11663cd3bfefef7d34e8f0892c250bf698049392 [INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+11663cd3bfefef7d34e8f0892c250bf698049392" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }` [INFO] started tweaking git repo https://github.com/Timtangxi/rust_thread [INFO] finished tweaking git repo https://github.com/Timtangxi/rust_thread [INFO] tweaked toml for git repo https://github.com/Timtangxi/rust_thread written to /workspace/builds/worker-7-tc1/source/Cargo.toml [INFO] crate git repo https://github.com/Timtangxi/rust_thread 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" "+11663cd3bfefef7d34e8f0892c250bf698049392" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }` [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:f3a9d4ad9d972b27faf3965f35b62e55ba32bbce8f20bc8fe909558a86702fde" "/opt/rustwide/cargo-home/bin/cargo" "+11663cd3bfefef7d34e8f0892c250bf698049392" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }` [INFO] [stdout] 2953c840150cdebf4225c0455dd9d8579a017e05bef2324d0276917da3458a87 [INFO] running `Command { std: "docker" "start" "-a" "2953c840150cdebf4225c0455dd9d8579a017e05bef2324d0276917da3458a87", kill_on_drop: false }` [INFO] running `Command { std: "docker" "inspect" "2953c840150cdebf4225c0455dd9d8579a017e05bef2324d0276917da3458a87", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "2953c840150cdebf4225c0455dd9d8579a017e05bef2324d0276917da3458a87", kill_on_drop: false }` [INFO] [stdout] 2953c840150cdebf4225c0455dd9d8579a017e05bef2324d0276917da3458a87 [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid -Dtail-expr-drop-order" "-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:f3a9d4ad9d972b27faf3965f35b62e55ba32bbce8f20bc8fe909558a86702fde" "/opt/rustwide/cargo-home/bin/cargo" "+11663cd3bfefef7d34e8f0892c250bf698049392" "build" "--frozen" "--message-format=json", kill_on_drop: false }` [INFO] [stdout] 719c0eb83fb8d11c235899bbe5f3ae787fef0fbf583a9f63d7e338c668cd303b [INFO] running `Command { std: "docker" "start" "-a" "719c0eb83fb8d11c235899bbe5f3ae787fef0fbf583a9f63d7e338c668cd303b", kill_on_drop: false }` [INFO] [stderr] Compiling libc v0.2.155 [INFO] [stderr] Compiling ppv-lite86 v0.2.17 [INFO] [stderr] Compiling getrandom v0.2.15 [INFO] [stderr] Compiling rand_core v0.6.4 [INFO] [stderr] Compiling rand_chacha v0.3.1 [INFO] [stderr] Compiling rand v0.8.5 [INFO] [stderr] Compiling rust_thread v0.1.0 (/opt/rustwide/workdir) [INFO] [stdout] warning: unused variable: `r1` [INFO] [stdout] --> src/some_test/std_io.rs:160:17 [INFO] [stdout] | [INFO] [stdout] 160 | let r1 = &mut s; [INFO] [stdout] | ^^ help: if this is intentional, prefix it with an underscore: `_r1` [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_variables)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `r2` [INFO] [stdout] --> src/some_test/std_io.rs:161:17 [INFO] [stdout] | [INFO] [stdout] 161 | let r2 = &mut s; // [INFO] [stdout] | ^^ help: if this is intentional, prefix it with an underscore: `_r2` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: variable does not need to be mutable [INFO] [stdout] --> src/some_test/std_io.rs:169:13 [INFO] [stdout] | [INFO] [stdout] 169 | let mut s = String::from("hello"); [INFO] [stdout] | ----^ [INFO] [stdout] | | [INFO] [stdout] | help: remove this `mut` [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_mut)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: value assigned to `x` is never read [INFO] [stdout] --> src/some_test/std_io.rs:217:17 [INFO] [stdout] | [INFO] [stdout] 217 | let mut x: i32 = x * 2; [INFO] [stdout] | ^ [INFO] [stdout] | [INFO] [stdout] = help: maybe it is overwritten before being read? [INFO] [stdout] = note: `#[warn(unused_assignments)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function cannot return without recursing [INFO] [stdout] --> src/some_test/stuct_test.rs:19:1 [INFO] [stdout] | [INFO] [stdout] 19 | fn struct_test(){ [INFO] [stdout] | ^^^^^^^^^^^^^^^^ cannot return without recursing [INFO] [stdout] ... [INFO] [stdout] 37 | struct_test(); [INFO] [stdout] | ------------- recursive call site [INFO] [stdout] | [INFO] [stdout] = help: a `loop` may express intention better if this is on purpose [INFO] [stdout] = note: `#[warn(unconditional_recursion)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `size1` [INFO] [stdout] --> src/some_test/stuct_test.rs:70:30 [INFO] [stdout] | [INFO] [stdout] 70 | pub fn square(size: u32, size1: u32) -> Self { [INFO] [stdout] | ^^^^^ help: if this is intentional, prefix it with an underscore: `_size1` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `geussed_play` is never used [INFO] [stdout] --> src/some_test/std_io.rs:9:15 [INFO] [stdout] | [INFO] [stdout] 9 | pub(crate) fn geussed_play() { [INFO] [stdout] | ^^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(dead_code)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `string_test` is never used [INFO] [stdout] --> src/some_test/std_io.rs:48:15 [INFO] [stdout] | [INFO] [stdout] 48 | pub(crate) fn string_test(){ [INFO] [stdout] | ^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `other` is never used [INFO] [stdout] --> src/some_test/std_io.rs:147:4 [INFO] [stdout] | [INFO] [stdout] 147 | fn other() { [INFO] [stdout] | ^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: constant `THREE_HOURS_IN_SECONDS` is never used [INFO] [stdout] --> src/some_test/std_io.rs:190:7 [INFO] [stdout] | [INFO] [stdout] 190 | const THREE_HOURS_IN_SECONDS: u32 = 60 * 60 * 3; [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `num_run` is never used [INFO] [stdout] --> src/some_test/std_io.rs:191:4 [INFO] [stdout] | [INFO] [stdout] 191 | fn num_run() { [INFO] [stdout] | ^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `five` is never used [INFO] [stdout] --> src/some_test/std_io.rs:229:4 [INFO] [stdout] | [INFO] [stdout] 229 | fn five(x:i32) -> i32 { [INFO] [stdout] | ^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `calculate_length` is never used [INFO] [stdout] --> src/some_test/std_io.rs:233:4 [INFO] [stdout] | [INFO] [stdout] 233 | fn calculate_length(s: String) -> (String, usize) { [INFO] [stdout] | ^^^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `gives_ownership` is never used [INFO] [stdout] --> src/some_test/std_io.rs:238:4 [INFO] [stdout] | [INFO] [stdout] 238 | fn gives_ownership() -> String { // gives_ownership 会将返回值移动给调用它的函数 [INFO] [stdout] | ^^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `takes_and_gives_back` is never used [INFO] [stdout] --> src/some_test/std_io.rs:244:4 [INFO] [stdout] | [INFO] [stdout] 244 | fn takes_and_gives_back(a_string: String) -> String { // a_string 进入作用域 [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `takes_ownership` is never used [INFO] [stdout] --> src/some_test/std_io.rs:248:4 [INFO] [stdout] | [INFO] [stdout] 248 | fn takes_ownership(some_string: String) { // some_string 进入作用域 [INFO] [stdout] | ^^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `makes_copy` is never used [INFO] [stdout] --> src/some_test/std_io.rs:252:4 [INFO] [stdout] | [INFO] [stdout] 252 | fn makes_copy(some_integer: i32) { // some_integer 进入作用域 [INFO] [stdout] | ^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `calculate_length_test` is never used [INFO] [stdout] --> src/some_test/std_io.rs:256:4 [INFO] [stdout] | [INFO] [stdout] 256 | fn calculate_length_test(s: &String) -> usize { [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `change` is never used [INFO] [stdout] --> src/some_test/std_io.rs:260:4 [INFO] [stdout] | [INFO] [stdout] 260 | fn change(some_string: &mut String) { [INFO] [stdout] | ^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `first_word` is never used [INFO] [stdout] --> src/some_test/std_io.rs:264:4 [INFO] [stdout] | [INFO] [stdout] 264 | fn first_word(s: &String) -> &str { [INFO] [stdout] | ^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: struct `User` is never constructed [INFO] [stdout] --> src/some_test/stuct_test.rs:1:8 [INFO] [stdout] | [INFO] [stdout] 1 | struct User { [INFO] [stdout] | ^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `build_user` is never used [INFO] [stdout] --> src/some_test/stuct_test.rs:8:4 [INFO] [stdout] | [INFO] [stdout] 8 | fn build_user(email: &mut String, username: &mut String) -> User { [INFO] [stdout] | ^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: struct `Color` is never constructed [INFO] [stdout] --> src/some_test/stuct_test.rs:17:8 [INFO] [stdout] | [INFO] [stdout] 17 | struct Color(i32, i32, i32); [INFO] [stdout] | ^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `struct_test` is never used [INFO] [stdout] --> src/some_test/stuct_test.rs:19:4 [INFO] [stdout] | [INFO] [stdout] 19 | fn struct_test(){ [INFO] [stdout] | ^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: struct `Rectangle` is never constructed [INFO] [stdout] --> src/some_test/stuct_test.rs:55:8 [INFO] [stdout] | [INFO] [stdout] 55 | struct Rectangle { [INFO] [stdout] | ^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: associated items `area`, `width`, `can_hold`, and `square` are never used [INFO] [stdout] --> src/some_test/stuct_test.rs:61:12 [INFO] [stdout] | [INFO] [stdout] 60 | impl Rectangle { [INFO] [stdout] | -------------- associated items in this implementation [INFO] [stdout] 61 | pub fn area(&self) -> u32 { [INFO] [stdout] | ^^^^ [INFO] [stdout] ... [INFO] [stdout] 64 | pub fn width(&self) -> bool { [INFO] [stdout] | ^^^^^ [INFO] [stdout] ... [INFO] [stdout] 67 | pub fn can_hold(&self, other: &Rectangle) -> bool { [INFO] [stdout] | ^^^^^^^^ [INFO] [stdout] ... [INFO] [stdout] 70 | pub fn square(size: u32, size1: u32) -> Self { [INFO] [stdout] | ^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stderr] Finished `dev` profile [unoptimized + debuginfo] target(s) in 1.83s [INFO] running `Command { std: "docker" "inspect" "719c0eb83fb8d11c235899bbe5f3ae787fef0fbf583a9f63d7e338c668cd303b", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "719c0eb83fb8d11c235899bbe5f3ae787fef0fbf583a9f63d7e338c668cd303b", kill_on_drop: false }` [INFO] [stdout] 719c0eb83fb8d11c235899bbe5f3ae787fef0fbf583a9f63d7e338c668cd303b [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid -Dtail-expr-drop-order" "-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:f3a9d4ad9d972b27faf3965f35b62e55ba32bbce8f20bc8fe909558a86702fde" "/opt/rustwide/cargo-home/bin/cargo" "+11663cd3bfefef7d34e8f0892c250bf698049392" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }` [INFO] [stdout] c92a3320543752ddeccf3f40cf58f3b9d458cd09ad3e4ff6a365160632b4b275 [INFO] running `Command { std: "docker" "start" "-a" "c92a3320543752ddeccf3f40cf58f3b9d458cd09ad3e4ff6a365160632b4b275", kill_on_drop: false }` [INFO] [stderr] Compiling rust_thread v0.1.0 (/opt/rustwide/workdir) [INFO] [stdout] warning: unused variable: `r1` [INFO] [stdout] --> src/some_test/std_io.rs:160:17 [INFO] [stdout] | [INFO] [stdout] 160 | let r1 = &mut s; [INFO] [stdout] | ^^ help: if this is intentional, prefix it with an underscore: `_r1` [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_variables)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `r2` [INFO] [stdout] --> src/some_test/std_io.rs:161:17 [INFO] [stdout] | [INFO] [stdout] 161 | let r2 = &mut s; // [INFO] [stdout] | ^^ help: if this is intentional, prefix it with an underscore: `_r2` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: variable does not need to be mutable [INFO] [stdout] --> src/some_test/std_io.rs:169:13 [INFO] [stdout] | [INFO] [stdout] 169 | let mut s = String::from("hello"); [INFO] [stdout] | ----^ [INFO] [stdout] | | [INFO] [stdout] | help: remove this `mut` [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_mut)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: value assigned to `x` is never read [INFO] [stdout] --> src/some_test/std_io.rs:217:17 [INFO] [stdout] | [INFO] [stdout] 217 | let mut x: i32 = x * 2; [INFO] [stdout] | ^ [INFO] [stdout] | [INFO] [stdout] = help: maybe it is overwritten before being read? [INFO] [stdout] = note: `#[warn(unused_assignments)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function cannot return without recursing [INFO] [stdout] --> src/some_test/stuct_test.rs:19:1 [INFO] [stdout] | [INFO] [stdout] 19 | fn struct_test(){ [INFO] [stdout] | ^^^^^^^^^^^^^^^^ cannot return without recursing [INFO] [stdout] ... [INFO] [stdout] 37 | struct_test(); [INFO] [stdout] | ------------- recursive call site [INFO] [stdout] | [INFO] [stdout] = help: a `loop` may express intention better if this is on purpose [INFO] [stdout] = note: `#[warn(unconditional_recursion)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `size1` [INFO] [stdout] --> src/some_test/stuct_test.rs:70:30 [INFO] [stdout] | [INFO] [stdout] 70 | pub fn square(size: u32, size1: u32) -> Self { [INFO] [stdout] | ^^^^^ help: if this is intentional, prefix it with an underscore: `_size1` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `geussed_play` is never used [INFO] [stdout] --> src/some_test/std_io.rs:9:15 [INFO] [stdout] | [INFO] [stdout] 9 | pub(crate) fn geussed_play() { [INFO] [stdout] | ^^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(dead_code)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `string_test` is never used [INFO] [stdout] --> src/some_test/std_io.rs:48:15 [INFO] [stdout] | [INFO] [stdout] 48 | pub(crate) fn string_test(){ [INFO] [stdout] | ^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `other` is never used [INFO] [stdout] --> src/some_test/std_io.rs:147:4 [INFO] [stdout] | [INFO] [stdout] 147 | fn other() { [INFO] [stdout] | ^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: constant `THREE_HOURS_IN_SECONDS` is never used [INFO] [stdout] --> src/some_test/std_io.rs:190:7 [INFO] [stdout] | [INFO] [stdout] 190 | const THREE_HOURS_IN_SECONDS: u32 = 60 * 60 * 3; [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `num_run` is never used [INFO] [stdout] --> src/some_test/std_io.rs:191:4 [INFO] [stdout] | [INFO] [stdout] 191 | fn num_run() { [INFO] [stdout] | ^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `five` is never used [INFO] [stdout] --> src/some_test/std_io.rs:229:4 [INFO] [stdout] | [INFO] [stdout] 229 | fn five(x:i32) -> i32 { [INFO] [stdout] | ^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `calculate_length` is never used [INFO] [stdout] --> src/some_test/std_io.rs:233:4 [INFO] [stdout] | [INFO] [stdout] 233 | fn calculate_length(s: String) -> (String, usize) { [INFO] [stdout] | ^^^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `gives_ownership` is never used [INFO] [stdout] --> src/some_test/std_io.rs:238:4 [INFO] [stdout] | [INFO] [stdout] 238 | fn gives_ownership() -> String { // gives_ownership 会将返回值移动给调用它的函数 [INFO] [stdout] | ^^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `takes_and_gives_back` is never used [INFO] [stdout] --> src/some_test/std_io.rs:244:4 [INFO] [stdout] | [INFO] [stdout] 244 | fn takes_and_gives_back(a_string: String) -> String { // a_string 进入作用域 [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `takes_ownership` is never used [INFO] [stdout] --> src/some_test/std_io.rs:248:4 [INFO] [stdout] | [INFO] [stdout] 248 | fn takes_ownership(some_string: String) { // some_string 进入作用域 [INFO] [stdout] | ^^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `makes_copy` is never used [INFO] [stdout] --> src/some_test/std_io.rs:252:4 [INFO] [stdout] | [INFO] [stdout] 252 | fn makes_copy(some_integer: i32) { // some_integer 进入作用域 [INFO] [stdout] | ^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `calculate_length_test` is never used [INFO] [stdout] --> src/some_test/std_io.rs:256:4 [INFO] [stdout] | [INFO] [stdout] 256 | fn calculate_length_test(s: &String) -> usize { [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `change` is never used [INFO] [stdout] --> src/some_test/std_io.rs:260:4 [INFO] [stdout] | [INFO] [stdout] 260 | fn change(some_string: &mut String) { [INFO] [stdout] | ^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `first_word` is never used [INFO] [stdout] --> src/some_test/std_io.rs:264:4 [INFO] [stdout] | [INFO] [stdout] 264 | fn first_word(s: &String) -> &str { [INFO] [stdout] | ^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: struct `User` is never constructed [INFO] [stdout] --> src/some_test/stuct_test.rs:1:8 [INFO] [stdout] | [INFO] [stdout] 1 | struct User { [INFO] [stdout] | ^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `build_user` is never used [INFO] [stdout] --> src/some_test/stuct_test.rs:8:4 [INFO] [stdout] | [INFO] [stdout] 8 | fn build_user(email: &mut String, username: &mut String) -> User { [INFO] [stdout] | ^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: struct `Color` is never constructed [INFO] [stdout] --> src/some_test/stuct_test.rs:17:8 [INFO] [stdout] | [INFO] [stdout] 17 | struct Color(i32, i32, i32); [INFO] [stdout] | ^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `struct_test` is never used [INFO] [stdout] --> src/some_test/stuct_test.rs:19:4 [INFO] [stdout] | [INFO] [stdout] 19 | fn struct_test(){ [INFO] [stdout] | ^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: struct `Rectangle` is never constructed [INFO] [stdout] --> src/some_test/stuct_test.rs:55:8 [INFO] [stdout] | [INFO] [stdout] 55 | struct Rectangle { [INFO] [stdout] | ^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: associated items `area`, `width`, `can_hold`, and `square` are never used [INFO] [stdout] --> src/some_test/stuct_test.rs:61:12 [INFO] [stdout] | [INFO] [stdout] 60 | impl Rectangle { [INFO] [stdout] | -------------- associated items in this implementation [INFO] [stdout] 61 | pub fn area(&self) -> u32 { [INFO] [stdout] | ^^^^ [INFO] [stdout] ... [INFO] [stdout] 64 | pub fn width(&self) -> bool { [INFO] [stdout] | ^^^^^ [INFO] [stdout] ... [INFO] [stdout] 67 | pub fn can_hold(&self, other: &Rectangle) -> bool { [INFO] [stdout] | ^^^^^^^^ [INFO] [stdout] ... [INFO] [stdout] 70 | pub fn square(size: u32, size1: u32) -> Self { [INFO] [stdout] | ^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stderr] Finished `test` profile [unoptimized + debuginfo] target(s) in 0.16s [INFO] running `Command { std: "docker" "inspect" "c92a3320543752ddeccf3f40cf58f3b9d458cd09ad3e4ff6a365160632b4b275", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "c92a3320543752ddeccf3f40cf58f3b9d458cd09ad3e4ff6a365160632b4b275", kill_on_drop: false }` [INFO] [stdout] c92a3320543752ddeccf3f40cf58f3b9d458cd09ad3e4ff6a365160632b4b275