[INFO] cloning repository https://github.com/DreamLarva/learn-rust [INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/DreamLarva/learn-rust" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FDreamLarva%2Flearn-rust", kill_on_drop: false }` [INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FDreamLarva%2Flearn-rust'... [INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }` [INFO] [stdout] 9eda8d234818336d4069883085e5a1ec40965334 [INFO] checking DreamLarva/learn-rust against try#ffa4a0215752773248fb0f0a8092f1c3e7907e9e for pr-75585 [INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FDreamLarva%2Flearn-rust" "/workspace/builds/worker-5/source", kill_on_drop: false }` [INFO] [stderr] Cloning into '/workspace/builds/worker-5/source'... [INFO] [stderr] done. [INFO] validating manifest of git repo https://github.com/DreamLarva/learn-rust on toolchain ffa4a0215752773248fb0f0a8092f1c3e7907e9e [INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+ffa4a0215752773248fb0f0a8092f1c3e7907e9e" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }` [INFO] started tweaking git repo https://github.com/DreamLarva/learn-rust [INFO] finished tweaking git repo https://github.com/DreamLarva/learn-rust [INFO] tweaked toml for git repo https://github.com/DreamLarva/learn-rust written to /workspace/builds/worker-5/source/Cargo.toml [INFO] crate git repo https://github.com/DreamLarva/learn-rust already has a lockfile, it will not be regenerated [INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+ffa4a0215752773248fb0f0a8092f1c3e7907e9e" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }` [INFO] [stderr] Downloading crates ... [INFO] [stderr] Downloaded adder v0.1.0 [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/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" "rustops/crates-build-env@sha256:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+ffa4a0215752773248fb0f0a8092f1c3e7907e9e" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }` [INFO] [stdout] 0c5022fd840a328d0d610d28b652b041eca15ba5d3b6da9211170bca890c4b06 [INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap. [INFO] running `Command { std: "docker" "start" "-a" "0c5022fd840a328d0d610d28b652b041eca15ba5d3b6da9211170bca890c4b06", kill_on_drop: false }` [INFO] running `Command { std: "docker" "inspect" "0c5022fd840a328d0d610d28b652b041eca15ba5d3b6da9211170bca890c4b06", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "0c5022fd840a328d0d610d28b652b041eca15ba5d3b6da9211170bca890c4b06", kill_on_drop: false }` [INFO] [stdout] 0c5022fd840a328d0d610d28b652b041eca15ba5d3b6da9211170bca890c4b06 [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/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" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "rustops/crates-build-env@sha256:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+ffa4a0215752773248fb0f0a8092f1c3e7907e9e" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }` [INFO] [stdout] 0d289a136789f4f247568dfbaae8ac9bdc2bdacfcc62dba32858393c58b0c7d4 [INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap. [INFO] running `Command { std: "docker" "start" "-a" "0d289a136789f4f247568dfbaae8ac9bdc2bdacfcc62dba32858393c58b0c7d4", kill_on_drop: false }` [INFO] [stderr] Compiling libc v0.2.48 [INFO] [stderr] Checking adder v0.1.0 [INFO] [stderr] Checking rand v0.4.6 [INFO] [stderr] Checking rand v0.3.23 [INFO] [stderr] Checking the_rust_programming_language v0.1.0 (/opt/rustwide/workdir) [INFO] [stdout] warning: unused import: `std::collections::HashMap` [INFO] [stdout] --> src/main.rs:4:5 [INFO] [stdout] | [INFO] [stdout] 4 | use std::collections::HashMap; [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_imports)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused imports: `File`, `self` [INFO] [stdout] --> src/main.rs:5:15 [INFO] [stdout] | [INFO] [stdout] 5 | use std::fs::{self, File}; [INFO] [stdout] | ^^^^ ^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused import: `std::io::ErrorKind` [INFO] [stdout] --> src/main.rs:6:5 [INFO] [stdout] | [INFO] [stdout] 6 | use std::io::ErrorKind; [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused import: `std::io` [INFO] [stdout] --> src/main.rs:7:5 [INFO] [stdout] | [INFO] [stdout] 7 | use std::io; [INFO] [stdout] | ^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused import: `std::io::Read` [INFO] [stdout] --> src/main.rs:8:5 [INFO] [stdout] | [INFO] [stdout] 8 | use std::io::Read; [INFO] [stdout] | ^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused doc comment [INFO] [stdout] --> src/ch04.rs:31:5 [INFO] [stdout] | [INFO] [stdout] 31 | / /** [INFO] [stdout] 32 | | 用String类型理解 所有权,因为String是存储在堆上的 [INFO] [stdout] 33 | | // 字面量声明 声明的字符串是不能修改的 类型为 &str [INFO] [stdout] 34 | | let s0 = "abc"; [INFO] [stdout] 35 | | // 使用 String::from (注意有 mut) 可以修改 类型为 String [INFO] [stdout] 36 | | let mut s1 = String::from("hello"); [INFO] [stdout] 37 | | */ [INFO] [stdout] | |______^ [INFO] [stdout] ... [INFO] [stdout] 49 | let x = 5; // 对于字面量大小已经定了 [INFO] [stdout] | ---------- rustdoc does not generate documentation for statements [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_doc_comments)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function is never used: `setup` [INFO] [stdout] --> tests/common/mod.rs:5:8 [INFO] [stdout] | [INFO] [stdout] 5 | pub fn setup() { [INFO] [stdout] | ^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(dead_code)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused import: `std::collections::HashMap` [INFO] [stdout] --> src/main.rs:4:5 [INFO] [stdout] | [INFO] [stdout] 4 | use std::collections::HashMap; [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_imports)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused imports: `File`, `self` [INFO] [stdout] --> src/main.rs:5:15 [INFO] [stdout] | [INFO] [stdout] 5 | use std::fs::{self, File}; [INFO] [stdout] | ^^^^ ^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused import: `std::io::ErrorKind` [INFO] [stdout] --> src/main.rs:6:5 [INFO] [stdout] | [INFO] [stdout] 6 | use std::io::ErrorKind; [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused import: `std::io` [INFO] [stdout] --> src/main.rs:7:5 [INFO] [stdout] | [INFO] [stdout] 7 | use std::io; [INFO] [stdout] | ^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused import: `std::io::Read` [INFO] [stdout] --> src/main.rs:8:5 [INFO] [stdout] | [INFO] [stdout] 8 | use std::io::Read; [INFO] [stdout] | ^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused doc comment [INFO] [stdout] --> src/ch04.rs:31:5 [INFO] [stdout] | [INFO] [stdout] 31 | / /** [INFO] [stdout] 32 | | 用String类型理解 所有权,因为String是存储在堆上的 [INFO] [stdout] 33 | | // 字面量声明 声明的字符串是不能修改的 类型为 &str [INFO] [stdout] 34 | | let s0 = "abc"; [INFO] [stdout] 35 | | // 使用 String::from (注意有 mut) 可以修改 类型为 String [INFO] [stdout] 36 | | let mut s1 = String::from("hello"); [INFO] [stdout] 37 | | */ [INFO] [stdout] | |______^ [INFO] [stdout] ... [INFO] [stdout] 49 | let x = 5; // 对于字面量大小已经定了 [INFO] [stdout] | ---------- rustdoc does not generate documentation for statements [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_doc_comments)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: 1 warning emitted [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function is never used: `main` [INFO] [stdout] --> src/ch04.rs:85:12 [INFO] [stdout] | [INFO] [stdout] 85 | fn main() { [INFO] [stdout] | ^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(dead_code)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function is never used: `takes_ownership` [INFO] [stdout] --> src/ch04.rs:98:12 [INFO] [stdout] | [INFO] [stdout] 98 | fn takes_ownership(some_string: String) { // some_string 进入作用域 [INFO] [stdout] | ^^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function is never used: `makes_copy` [INFO] [stdout] --> src/ch04.rs:102:12 [INFO] [stdout] | [INFO] [stdout] 102 | fn makes_copy(some_integer: i32) { // some_integer 进入作用域 [INFO] [stdout] | ^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function is never used: `main` [INFO] [stdout] --> src/ch04.rs:109:12 [INFO] [stdout] | [INFO] [stdout] 109 | fn main() { [INFO] [stdout] | ^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function is never used: `gives_ownership` [INFO] [stdout] --> src/ch04.rs:122:12 [INFO] [stdout] | [INFO] [stdout] 122 | fn gives_ownership() -> String { // gives_ownership 将返回值移动给 [INFO] [stdout] | ^^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function is never used: `takes_and_gives_back` [INFO] [stdout] --> src/ch04.rs:131:12 [INFO] [stdout] | [INFO] [stdout] 131 | 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 is never used: `ch04_02_references_and_borrowing` [INFO] [stdout] --> src/ch04.rs:137:8 [INFO] [stdout] | [INFO] [stdout] 137 | pub fn ch04_02_references_and_borrowing() { [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function is never used: `ch04_03_slices` [INFO] [stdout] --> src/ch04.rs:222:8 [INFO] [stdout] | [INFO] [stdout] 222 | pub fn ch04_03_slices() { [INFO] [stdout] | ^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: 14 warnings emitted [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function is never used: `main` [INFO] [stdout] --> src/ch04.rs:85:12 [INFO] [stdout] | [INFO] [stdout] 85 | fn main() { [INFO] [stdout] | ^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(dead_code)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function is never used: `takes_ownership` [INFO] [stdout] --> src/ch04.rs:98:12 [INFO] [stdout] | [INFO] [stdout] 98 | fn takes_ownership(some_string: String) { // some_string 进入作用域 [INFO] [stdout] | ^^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function is never used: `makes_copy` [INFO] [stdout] --> src/ch04.rs:102:12 [INFO] [stdout] | [INFO] [stdout] 102 | fn makes_copy(some_integer: i32) { // some_integer 进入作用域 [INFO] [stdout] | ^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function is never used: `main` [INFO] [stdout] --> src/ch04.rs:109:12 [INFO] [stdout] | [INFO] [stdout] 109 | fn main() { [INFO] [stdout] | ^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function is never used: `gives_ownership` [INFO] [stdout] --> src/ch04.rs:122:12 [INFO] [stdout] | [INFO] [stdout] 122 | fn gives_ownership() -> String { // gives_ownership 将返回值移动给 [INFO] [stdout] | ^^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function is never used: `takes_and_gives_back` [INFO] [stdout] --> src/ch04.rs:131:12 [INFO] [stdout] | [INFO] [stdout] 131 | 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 is never used: `ch04_02_references_and_borrowing` [INFO] [stdout] --> src/ch04.rs:137:8 [INFO] [stdout] | [INFO] [stdout] 137 | pub fn ch04_02_references_and_borrowing() { [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function is never used: `ch04_03_slices` [INFO] [stdout] --> src/ch04.rs:222:8 [INFO] [stdout] | [INFO] [stdout] 222 | pub fn ch04_03_slices() { [INFO] [stdout] | ^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: 14 warnings emitted [INFO] [stdout] [INFO] [stdout] [INFO] [stderr] Finished dev [unoptimized + debuginfo] target(s) in 3.85s [INFO] running `Command { std: "docker" "inspect" "0d289a136789f4f247568dfbaae8ac9bdc2bdacfcc62dba32858393c58b0c7d4", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "0d289a136789f4f247568dfbaae8ac9bdc2bdacfcc62dba32858393c58b0c7d4", kill_on_drop: false }` [INFO] [stdout] 0d289a136789f4f247568dfbaae8ac9bdc2bdacfcc62dba32858393c58b0c7d4