[INFO] cloning repository https://github.com/gtt011029/rust_hello [INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/gtt011029/rust_hello" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fgtt011029%2Frust_hello", kill_on_drop: false }` [INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fgtt011029%2Frust_hello'... [INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }` [INFO] [stdout] d5a08aee84af823051a0c9b4daf468b2080c56f6 [INFO] checking gtt011029/rust_hello against try#f45c1ab62d4de6b63f69b4daa9d1f0b90c38a208 for pr-139419 [INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fgtt011029%2Frust_hello" "/workspace/builds/worker-2-tc2/source", kill_on_drop: false }` [INFO] [stderr] Cloning into '/workspace/builds/worker-2-tc2/source'... [INFO] [stderr] done. [INFO] validating manifest of git repo https://github.com/gtt011029/rust_hello on toolchain f45c1ab62d4de6b63f69b4daa9d1f0b90c38a208 [INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+f45c1ab62d4de6b63f69b4daa9d1f0b90c38a208" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }` [INFO] started tweaking git repo https://github.com/gtt011029/rust_hello [INFO] finished tweaking git repo https://github.com/gtt011029/rust_hello [INFO] tweaked toml for git repo https://github.com/gtt011029/rust_hello written to /workspace/builds/worker-2-tc2/source/Cargo.toml [INFO] crate git repo https://github.com/gtt011029/rust_hello 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" "+f45c1ab62d4de6b63f69b4daa9d1f0b90c38a208" "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 [ERROR] error running command: no output for 300 seconds [INFO] checking gtt011029/rust_hello against try#f45c1ab62d4de6b63f69b4daa9d1f0b90c38a208 for pr-139419 [INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fgtt011029%2Frust_hello" "/workspace/builds/worker-2-tc2/source", kill_on_drop: false }` [INFO] [stderr] Cloning into '/workspace/builds/worker-2-tc2/source'... [INFO] [stderr] done. [INFO] validating manifest of git repo https://github.com/gtt011029/rust_hello on toolchain f45c1ab62d4de6b63f69b4daa9d1f0b90c38a208 [INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+f45c1ab62d4de6b63f69b4daa9d1f0b90c38a208" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }` [INFO] started tweaking git repo https://github.com/gtt011029/rust_hello [INFO] finished tweaking git repo https://github.com/gtt011029/rust_hello [INFO] tweaked toml for git repo https://github.com/gtt011029/rust_hello written to /workspace/builds/worker-2-tc2/source/Cargo.toml [INFO] crate git repo https://github.com/gtt011029/rust_hello 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" "+f45c1ab62d4de6b63f69b4daa9d1f0b90c38a208" "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:b0b074c097205a61b89e8ad263052f976b2b332c4dc5f02aef1fe52501660d6e" "/opt/rustwide/cargo-home/bin/cargo" "+f45c1ab62d4de6b63f69b4daa9d1f0b90c38a208" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }` [INFO] [stdout] 24a0d3d200decae38ab7d9662849c3bd4b228793f167c17fdca30a1188b6e38d [INFO] running `Command { std: "docker" "start" "-a" "24a0d3d200decae38ab7d9662849c3bd4b228793f167c17fdca30a1188b6e38d", kill_on_drop: false }` [INFO] running `Command { std: "docker" "inspect" "24a0d3d200decae38ab7d9662849c3bd4b228793f167c17fdca30a1188b6e38d", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "24a0d3d200decae38ab7d9662849c3bd4b228793f167c17fdca30a1188b6e38d", kill_on_drop: false }` [INFO] [stdout] 24a0d3d200decae38ab7d9662849c3bd4b228793f167c17fdca30a1188b6e38d [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:b0b074c097205a61b89e8ad263052f976b2b332c4dc5f02aef1fe52501660d6e" "/opt/rustwide/cargo-home/bin/cargo" "+f45c1ab62d4de6b63f69b4daa9d1f0b90c38a208" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }` [INFO] [stdout] 110e651e0afe2b900d2a96e688d67973a5bd04f04051a55fd3e3360fd0bfdf8d [INFO] running `Command { std: "docker" "start" "-a" "110e651e0afe2b900d2a96e688d67973a5bd04f04051a55fd3e3360fd0bfdf8d", kill_on_drop: false }` [INFO] [stderr] Compiling libc v0.2.153 [INFO] [stderr] Checking cfg-if v1.0.0 [INFO] [stderr] Checking ppv-lite86 v0.2.17 [INFO] [stderr] Checking getrandom v0.2.12 [INFO] [stderr] Checking rand_core v0.6.4 [INFO] [stderr] Checking rand_chacha v0.3.1 [INFO] [stderr] Checking rand v0.8.5 [INFO] [stderr] Checking hello_cargo v0.1.0 (/opt/rustwide/workdir) [INFO] [stdout] warning: variable does not need to be mutable [INFO] [stdout] --> src/ownership.rs:44:13 [INFO] [stdout] | [INFO] [stdout] 44 | let mut s1 = 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: unused variable: `x` [INFO] [stdout] --> src/ownership.rs:66:9 [INFO] [stdout] | [INFO] [stdout] 66 | let x = 5; [INFO] [stdout] | ^ help: if this is intentional, prefix it with an underscore: `_x` [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_variables)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `s1` [INFO] [stdout] --> src/ownership.rs:89:9 [INFO] [stdout] | [INFO] [stdout] 89 | let s1 = gives_ownership(); [INFO] [stdout] | ^^ help: if this is intentional, prefix it with an underscore: `_s1` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `s3` [INFO] [stdout] --> src/ownership.rs:91:9 [INFO] [stdout] | [INFO] [stdout] 91 | let s3 = takes_and_give_back(s2); [INFO] [stdout] | ^^ help: if this is intentional, prefix it with an underscore: `_s3` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `r1` [INFO] [stdout] --> src/ownership.rs:105:9 [INFO] [stdout] | [INFO] [stdout] 105 | let r1 = &mut s1; [INFO] [stdout] | ^^ help: if this is intentional, prefix it with an underscore: `_r1` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: variable does not need to be mutable [INFO] [stdout] --> src/ownership.rs:162:9 [INFO] [stdout] | [INFO] [stdout] 162 | let mut s = String::from("hello world"); [INFO] [stdout] | ----^ [INFO] [stdout] | | [INFO] [stdout] | help: remove this `mut` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `guess` is never used [INFO] [stdout] --> src/main.rs:9:4 [INFO] [stdout] | [INFO] [stdout] 9 | fn guess() { [INFO] [stdout] | ^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(dead_code)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `variable` is never used [INFO] [stdout] --> src/main.rs:32:4 [INFO] [stdout] | [INFO] [stdout] 32 | fn variable() { [INFO] [stdout] | ^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `hidden` is never used [INFO] [stdout] --> src/main.rs:39:4 [INFO] [stdout] | [INFO] [stdout] 39 | fn hidden() { [INFO] [stdout] | ^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `arr` is never used [INFO] [stdout] --> src/main.rs:52:4 [INFO] [stdout] | [INFO] [stdout] 52 | fn arr() { [INFO] [stdout] | ^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `anther_fun` is never used [INFO] [stdout] --> src/main.rs:70:4 [INFO] [stdout] | [INFO] [stdout] 70 | fn anther_fun(x: i32) { [INFO] [stdout] | ^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `five` is never used [INFO] [stdout] --> src/main.rs:76:4 [INFO] [stdout] | [INFO] [stdout] 76 | fn five() -> i32 { [INFO] [stdout] | ^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `plus_one` is never used [INFO] [stdout] --> src/main.rs:79:4 [INFO] [stdout] | [INFO] [stdout] 79 | fn plus_one(x: i32) -> i32 { [INFO] [stdout] | ^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `if_test` is never used [INFO] [stdout] --> src/main.rs:83:4 [INFO] [stdout] | [INFO] [stdout] 83 | fn if_test() { [INFO] [stdout] | ^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `loop_test` is never used [INFO] [stdout] --> src/main.rs:89:4 [INFO] [stdout] | [INFO] [stdout] 89 | fn loop_test() { [INFO] [stdout] | ^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `loop_loop_test` is never used [INFO] [stdout] --> src/main.rs:103:4 [INFO] [stdout] | [INFO] [stdout] 103 | fn loop_loop_test() { [INFO] [stdout] | ^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `while_test` is never used [INFO] [stdout] --> src/main.rs:125:4 [INFO] [stdout] | [INFO] [stdout] 125 | fn while_test() { [INFO] [stdout] | ^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `for_test` is never used [INFO] [stdout] --> src/main.rs:134:4 [INFO] [stdout] | [INFO] [stdout] 134 | fn for_test() { [INFO] [stdout] | ^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `str_ship` is never used [INFO] [stdout] --> src/ownership.rs:29:12 [INFO] [stdout] | [INFO] [stdout] 29 | pub fn str_ship(){ [INFO] [stdout] | ^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `fun_ship` is never used [INFO] [stdout] --> src/ownership.rs:59:9 [INFO] [stdout] | [INFO] [stdout] 59 | pub fn fun_ship() { [INFO] [stdout] | ^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `takes_ownership` is never used [INFO] [stdout] --> src/ownership.rs:71:5 [INFO] [stdout] | [INFO] [stdout] 71 | fn takes_ownership(some_string: String) { [INFO] [stdout] | ^^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `makes_copy` is never used [INFO] [stdout] --> src/ownership.rs:75:5 [INFO] [stdout] | [INFO] [stdout] 75 | fn makes_copy(some_interger: i32) { [INFO] [stdout] | ^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `gives_ownership` is never used [INFO] [stdout] --> src/ownership.rs:79:5 [INFO] [stdout] | [INFO] [stdout] 79 | fn gives_ownership() -> String { [INFO] [stdout] | ^^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `takes_and_give_back` is never used [INFO] [stdout] --> src/ownership.rs:84:5 [INFO] [stdout] | [INFO] [stdout] 84 | fn takes_and_give_back(a_string: String) -> String { [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `fun_ship_2` is never used [INFO] [stdout] --> src/ownership.rs:88:9 [INFO] [stdout] | [INFO] [stdout] 88 | pub fn fun_ship_2() { [INFO] [stdout] | ^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `fun_ship_3` is never used [INFO] [stdout] --> src/ownership.rs:99:9 [INFO] [stdout] | [INFO] [stdout] 99 | pub fn fun_ship_3() { [INFO] [stdout] | ^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `calculate_length` is never used [INFO] [stdout] --> src/ownership.rs:120:5 [INFO] [stdout] | [INFO] [stdout] 120 | fn calculate_length(s: &String) -> usize { [INFO] [stdout] | ^^^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `change` is never used [INFO] [stdout] --> src/ownership.rs:125:5 [INFO] [stdout] | [INFO] [stdout] 125 | fn change(some_string: &mut String) { [INFO] [stdout] | ^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `dangling2` is never used [INFO] [stdout] --> src/ownership.rs:140:8 [INFO] [stdout] | [INFO] [stdout] 140 | fn dangling2() -> String { // 这样是可以的， 这边变量的所有者也会变更 [INFO] [stdout] | ^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `first_word` is never used [INFO] [stdout] --> src/ownership.rs:173:4 [INFO] [stdout] | [INFO] [stdout] 173 | fn first_word(s: &String) -> usize { [INFO] [stdout] | ^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: variable does not need to be mutable [INFO] [stdout] --> src/ownership.rs:44:13 [INFO] [stdout] | [INFO] [stdout] 44 | let mut s1 = 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: unused variable: `x` [INFO] [stdout] --> src/ownership.rs:66:9 [INFO] [stdout] | [INFO] [stdout] 66 | let x = 5; [INFO] [stdout] | ^ help: if this is intentional, prefix it with an underscore: `_x` [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_variables)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `s1` [INFO] [stdout] --> src/ownership.rs:89:9 [INFO] [stdout] | [INFO] [stdout] 89 | let s1 = gives_ownership(); [INFO] [stdout] | ^^ help: if this is intentional, prefix it with an underscore: `_s1` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `s3` [INFO] [stdout] --> src/ownership.rs:91:9 [INFO] [stdout] | [INFO] [stdout] 91 | let s3 = takes_and_give_back(s2); [INFO] [stdout] | ^^ help: if this is intentional, prefix it with an underscore: `_s3` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `r1` [INFO] [stdout] --> src/ownership.rs:105:9 [INFO] [stdout] | [INFO] [stdout] 105 | let r1 = &mut s1; [INFO] [stdout] | ^^ help: if this is intentional, prefix it with an underscore: `_r1` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: variable does not need to be mutable [INFO] [stdout] --> src/ownership.rs:162:9 [INFO] [stdout] | [INFO] [stdout] 162 | let mut s = String::from("hello world"); [INFO] [stdout] | ----^ [INFO] [stdout] | | [INFO] [stdout] | help: remove this `mut` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `guess` is never used [INFO] [stdout] --> src/main.rs:9:4 [INFO] [stdout] | [INFO] [stdout] 9 | fn guess() { [INFO] [stdout] | ^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(dead_code)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `variable` is never used [INFO] [stdout] --> src/main.rs:32:4 [INFO] [stdout] | [INFO] [stdout] 32 | fn variable() { [INFO] [stdout] | ^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `hidden` is never used [INFO] [stdout] --> src/main.rs:39:4 [INFO] [stdout] | [INFO] [stdout] 39 | fn hidden() { [INFO] [stdout] | ^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `arr` is never used [INFO] [stdout] --> src/main.rs:52:4 [INFO] [stdout] | [INFO] [stdout] 52 | fn arr() { [INFO] [stdout] | ^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `anther_fun` is never used [INFO] [stdout] --> src/main.rs:70:4 [INFO] [stdout] | [INFO] [stdout] 70 | fn anther_fun(x: i32) { [INFO] [stdout] | ^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `five` is never used [INFO] [stdout] --> src/main.rs:76:4 [INFO] [stdout] | [INFO] [stdout] 76 | fn five() -> i32 { [INFO] [stdout] | ^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `plus_one` is never used [INFO] [stdout] --> src/main.rs:79:4 [INFO] [stdout] | [INFO] [stdout] 79 | fn plus_one(x: i32) -> i32 { [INFO] [stdout] | ^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `if_test` is never used [INFO] [stdout] --> src/main.rs:83:4 [INFO] [stdout] | [INFO] [stdout] 83 | fn if_test() { [INFO] [stdout] | ^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `loop_test` is never used [INFO] [stdout] --> src/main.rs:89:4 [INFO] [stdout] | [INFO] [stdout] 89 | fn loop_test() { [INFO] [stdout] | ^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `loop_loop_test` is never used [INFO] [stdout] --> src/main.rs:103:4 [INFO] [stdout] | [INFO] [stdout] 103 | fn loop_loop_test() { [INFO] [stdout] | ^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `while_test` is never used [INFO] [stdout] --> src/main.rs:125:4 [INFO] [stdout] | [INFO] [stdout] 125 | fn while_test() { [INFO] [stdout] | ^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `for_test` is never used [INFO] [stdout] --> src/main.rs:134:4 [INFO] [stdout] | [INFO] [stdout] 134 | fn for_test() { [INFO] [stdout] | ^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `str_ship` is never used [INFO] [stdout] --> src/ownership.rs:29:12 [INFO] [stdout] | [INFO] [stdout] 29 | pub fn str_ship(){ [INFO] [stdout] | ^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `fun_ship` is never used [INFO] [stdout] --> src/ownership.rs:59:9 [INFO] [stdout] | [INFO] [stdout] 59 | pub fn fun_ship() { [INFO] [stdout] | ^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `takes_ownership` is never used [INFO] [stdout] --> src/ownership.rs:71:5 [INFO] [stdout] | [INFO] [stdout] 71 | fn takes_ownership(some_string: String) { [INFO] [stdout] | ^^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `makes_copy` is never used [INFO] [stdout] --> src/ownership.rs:75:5 [INFO] [stdout] | [INFO] [stdout] 75 | fn makes_copy(some_interger: i32) { [INFO] [stdout] | ^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `gives_ownership` is never used [INFO] [stdout] --> src/ownership.rs:79:5 [INFO] [stdout] | [INFO] [stdout] 79 | fn gives_ownership() -> String { [INFO] [stdout] | ^^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `takes_and_give_back` is never used [INFO] [stdout] --> src/ownership.rs:84:5 [INFO] [stdout] | [INFO] [stdout] 84 | fn takes_and_give_back(a_string: String) -> String { [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `fun_ship_2` is never used [INFO] [stdout] --> src/ownership.rs:88:9 [INFO] [stdout] | [INFO] [stdout] 88 | pub fn fun_ship_2() { [INFO] [stdout] | ^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `fun_ship_3` is never used [INFO] [stdout] --> src/ownership.rs:99:9 [INFO] [stdout] | [INFO] [stdout] 99 | pub fn fun_ship_3() { [INFO] [stdout] | ^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `calculate_length` is never used [INFO] [stdout] --> src/ownership.rs:120:5 [INFO] [stdout] | [INFO] [stdout] 120 | fn calculate_length(s: &String) -> usize { [INFO] [stdout] | ^^^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `change` is never used [INFO] [stdout] --> src/ownership.rs:125:5 [INFO] [stdout] | [INFO] [stdout] 125 | fn change(some_string: &mut String) { [INFO] [stdout] | ^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `dangling2` is never used [INFO] [stdout] --> src/ownership.rs:140:8 [INFO] [stdout] | [INFO] [stdout] 140 | fn dangling2() -> String { // 这样是可以的， 这边变量的所有者也会变更 [INFO] [stdout] | ^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `first_word` is never used [INFO] [stdout] --> src/ownership.rs:173:4 [INFO] [stdout] | [INFO] [stdout] 173 | fn first_word(s: &String) -> usize { [INFO] [stdout] | ^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stderr] Finished `dev` profile [unoptimized + debuginfo] target(s) in 2.31s [INFO] running `Command { std: "docker" "inspect" "110e651e0afe2b900d2a96e688d67973a5bd04f04051a55fd3e3360fd0bfdf8d", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "110e651e0afe2b900d2a96e688d67973a5bd04f04051a55fd3e3360fd0bfdf8d", kill_on_drop: false }` [INFO] [stdout] 110e651e0afe2b900d2a96e688d67973a5bd04f04051a55fd3e3360fd0bfdf8d