[INFO] cloning repository https://github.com/zhenhuanlee/rust_learn [INFO] running `"git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/zhenhuanlee/rust_learn" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fzhenhuanlee%2Frust_learn"` [INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fzhenhuanlee%2Frust_learn'... [INFO] running `"git" "rev-parse" "HEAD"` [INFO] [stdout] f0260ca00cf2a85b25360659997043da257c353b [INFO] checking zhenhuanlee/rust_learn against try#e4dba30b9b475d8750370c4dfb49b6541990904d for pr-71393 [INFO] running `"git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fzhenhuanlee%2Frust_learn" "/workspace/builds/worker-2/source"` [INFO] [stderr] Cloning into '/workspace/builds/worker-2/source'... [INFO] [stderr] done. [INFO] validating manifest of git repo https://github.com/zhenhuanlee/rust_learn on toolchain e4dba30b9b475d8750370c4dfb49b6541990904d [INFO] running `"/workspace/cargo-home/bin/cargo" "+e4dba30b9b475d8750370c4dfb49b6541990904d" "read-manifest" "--manifest-path" "Cargo.toml"` [INFO] started tweaking git repo https://github.com/zhenhuanlee/rust_learn [INFO] finished tweaking git repo https://github.com/zhenhuanlee/rust_learn [INFO] tweaked toml for git repo https://github.com/zhenhuanlee/rust_learn written to /workspace/builds/worker-2/source/Cargo.toml [INFO] crate git repo https://github.com/zhenhuanlee/rust_learn already has a lockfile, it will not be regenerated [INFO] running `"/workspace/cargo-home/bin/cargo" "+e4dba30b9b475d8750370c4dfb49b6541990904d" "fetch" "--locked" "--manifest-path" "Cargo.toml"` [INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/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" "MAP_USER_ID=0" "-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" "--network" "none" "rustops/crates-build-env" "/opt/rustwide/cargo-home/bin/cargo" "+e4dba30b9b475d8750370c4dfb49b6541990904d" "check" "--frozen" "--all" "--all-targets"` [INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap. [INFO] [stdout] 30c7e7a249317b006d513aec36033c3d7622ee05606d039741cbf12a97708eae [INFO] running `"docker" "start" "-a" "30c7e7a249317b006d513aec36033c3d7622ee05606d039741cbf12a97708eae"` [INFO] [stderr] Checking soo v0.1.0 (/opt/rustwide/workdir) [INFO] [stderr] warning: unused variable: `s3` [INFO] [stderr] --> src/main.rs:39:9 [INFO] [stderr] | [INFO] [stderr] 39 | let s3 = s1.clone(); // 拷贝 [INFO] [stderr] | ^^ help: if this is intentional, prefix it with an underscore: `_s3` [INFO] [stderr] | [INFO] [stderr] = note: `#[warn(unused_variables)]` on by default [INFO] [stderr] [INFO] [stderr] warning: unused variable: `s2` [INFO] [stderr] --> src/main.rs:40:9 [INFO] [stderr] | [INFO] [stderr] 40 | let s2 = s1; // 指针传递，s1 被移除 [INFO] [stderr] | ^^ help: if this is intentional, prefix it with an underscore: `_s2` [INFO] [stderr] [INFO] [stderr] warning: unused variable: `s5` [INFO] [stderr] --> src/main.rs:45:9 [INFO] [stderr] | [INFO] [stderr] 45 | let s5 = s4; // 合法，因为是值传递 [INFO] [stderr] | ^^ help: if this is intentional, prefix it with an underscore: `_s5` [INFO] [stderr] [INFO] [stderr] warning: unused variable: `r1` [INFO] [stderr] --> src/main.rs:99:9 [INFO] [stderr] | [INFO] [stderr] 99 | let r1 = &mut s; [INFO] [stderr] | ^^ help: if this is intentional, prefix it with an underscore: `_r1` [INFO] [stderr] [INFO] [stderr] warning: unused variable: `r3` [INFO] [stderr] --> src/main.rs:103:13 [INFO] [stderr] | [INFO] [stderr] 103 | let r3 = &s2; [INFO] [stderr] | ^^ help: if this is intentional, prefix it with an underscore: `_r3` [INFO] [stderr] [INFO] [stderr] warning: unused variable: `r4` [INFO] [stderr] --> src/main.rs:105:9 [INFO] [stderr] | [INFO] [stderr] 105 | let r4 = &mut &s2; [INFO] [stderr] | ^^ help: if this is intentional, prefix it with an underscore: `_r4` [INFO] [stderr] [INFO] [stderr] warning: variable does not need to be mutable [INFO] [stderr] --> src/main.rs:97:9 [INFO] [stderr] | [INFO] [stderr] 97 | let mut s2 = String::from("world"); [INFO] [stderr] | ----^^ [INFO] [stderr] | | [INFO] [stderr] | help: remove this `mut` [INFO] [stderr] | [INFO] [stderr] = note: `#[warn(unused_mut)]` on by default [INFO] [stderr] [INFO] [stderr] warning: variable does not need to be mutable [INFO] [stderr] --> src/main.rs:120:9 [INFO] [stderr] | [INFO] [stderr] 120 | let mut s = String::from("hello world"); [INFO] [stderr] | ----^ [INFO] [stderr] | | [INFO] [stderr] | help: remove this `mut` [INFO] [stderr] [INFO] [stderr] warning: function is never used: `test1` [INFO] [stderr] --> src/main.rs:30:4 [INFO] [stderr] | [INFO] [stderr] 30 | fn test1 () { [INFO] [stderr] | ^^^^^ [INFO] [stderr] | [INFO] [stderr] = note: `#[warn(dead_code)]` on by default [INFO] [stderr] [INFO] [stderr] warning: function is never used: `test2` [INFO] [stderr] --> src/main.rs:37:4 [INFO] [stderr] | [INFO] [stderr] 37 | fn test2() { [INFO] [stderr] | ^^^^^ [INFO] [stderr] [INFO] [stderr] warning: function is never used: `test3` [INFO] [stderr] --> src/main.rs:55:4 [INFO] [stderr] | [INFO] [stderr] 55 | fn test3() { [INFO] [stderr] | ^^^^^ [INFO] [stderr] [INFO] [stderr] warning: function is never used: `test3_1` [INFO] [stderr] --> src/main.rs:66:4 [INFO] [stderr] | [INFO] [stderr] 66 | fn test3_1(sth: String) { [INFO] [stderr] | ^^^^^^^ [INFO] [stderr] [INFO] [stderr] warning: function is never used: `test3_2` [INFO] [stderr] --> src/main.rs:70:4 [INFO] [stderr] | [INFO] [stderr] 70 | fn test3_2(si: i32) { [INFO] [stderr] | ^^^^^^^ [INFO] [stderr] [INFO] [stderr] warning: function is never used: `test4` [INFO] [stderr] --> src/main.rs:75:4 [INFO] [stderr] | [INFO] [stderr] 75 | fn test4() { [INFO] [stderr] | ^^^^^ [INFO] [stderr] [INFO] [stderr] warning: function is never used: `test4_1` [INFO] [stderr] --> src/main.rs:82:4 [INFO] [stderr] | [INFO] [stderr] 82 | fn test4_1(s: &String) -> usize { [INFO] [stderr] | ^^^^^^^ [INFO] [stderr] [INFO] [stderr] warning: function is never used: `test5` [INFO] [stderr] --> src/main.rs:86:4 [INFO] [stderr] | [INFO] [stderr] 86 | fn test5() { [INFO] [stderr] | ^^^^^ [INFO] [stderr] [INFO] [stderr] warning: function is never used: `test5_1` [INFO] [stderr] --> src/main.rs:91:4 [INFO] [stderr] | [INFO] [stderr] 91 | fn test5_1(s: &mut String) { [INFO] [stderr] | ^^^^^^^ [INFO] [stderr] [INFO] [stderr] warning: function is never used: `test6` [INFO] [stderr] --> src/main.rs:95:4 [INFO] [stderr] | [INFO] [stderr] 95 | fn test6() { [INFO] [stderr] | ^^^^^ [INFO] [stderr] [INFO] [stderr] warning: function is never used: `test7` [INFO] [stderr] --> src/main.rs:110:4 [INFO] [stderr] | [INFO] [stderr] 110 | fn test7() { [INFO] [stderr] | ^^^^^ [INFO] [stderr] [INFO] [stderr] warning: function is never used: `test8` [INFO] [stderr] --> src/main.rs:119:4 [INFO] [stderr] | [INFO] [stderr] 119 | fn test8() { [INFO] [stderr] | ^^^^^ [INFO] [stderr] [INFO] [stderr] warning: function is never used: `test9` [INFO] [stderr] --> src/main.rs:131:4 [INFO] [stderr] | [INFO] [stderr] 131 | fn test9() { [INFO] [stderr] | ^^^^^ [INFO] [stderr] [INFO] [stderr] warning: function is never used: `test10` [INFO] [stderr] --> src/main.rs:147:4 [INFO] [stderr] | [INFO] [stderr] 147 | fn test10() { [INFO] [stderr] | ^^^^^^ [INFO] [stderr] [INFO] [stderr] warning: method is never used: `area` [INFO] [stderr] --> src/main.rs:167:5 [INFO] [stderr] | [INFO] [stderr] 167 | fn area(&mut self) { [INFO] [stderr] | ^^^^^^^^^^^^^^^^^^ [INFO] [stderr] [INFO] [stderr] warning: method is never used: `can_hold` [INFO] [stderr] --> src/main.rs:172:5 [INFO] [stderr] | [INFO] [stderr] 172 | fn can_hold(&self, other: &Rectangle) { [INFO] [stderr] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stderr] [INFO] [stderr] warning: method is never used: `square` [INFO] [stderr] --> src/main.rs:176:5 [INFO] [stderr] | [INFO] [stderr] 176 | fn square(size: u32) -> Rectangle { [INFO] [stderr] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stderr] [INFO] [stderr] warning: variant is never constructed: `V4` [INFO] [stderr] --> src/main.rs:184:5 [INFO] [stderr] | [INFO] [stderr] 184 | V4, [INFO] [stderr] | ^^ [INFO] [stderr] [INFO] [stderr] warning: variant is never constructed: `V6` [INFO] [stderr] --> src/main.rs:185:5 [INFO] [stderr] | [INFO] [stderr] 185 | V6, [INFO] [stderr] | ^^ [INFO] [stderr] [INFO] [stderr] warning: variant is never constructed: `V4` [INFO] [stderr] --> src/main.rs:189:5 [INFO] [stderr] | [INFO] [stderr] 189 | V4(u8, u8, u8, u8), // ip由4个字节组成 [INFO] [stderr] | ^^^^^^^^^^^^^^^^^^ [INFO] [stderr] [INFO] [stderr] warning: variant is never constructed: `V6` [INFO] [stderr] --> src/main.rs:190:5 [INFO] [stderr] | [INFO] [stderr] 190 | V6(String), // 枚举对象的构造函数，很像结构体 [INFO] [stderr] | ^^^^^^^^^^ [INFO] [stderr] [INFO] [stderr] warning: function is never used: `test11` [INFO] [stderr] --> src/main.rs:200:4 [INFO] [stderr] | [INFO] [stderr] 200 | fn test11() { [INFO] [stderr] | ^^^^^^ [INFO] [stderr] [INFO] [stderr] warning: method is never used: `print_addr` [INFO] [stderr] --> src/main.rs:218:5 [INFO] [stderr] | [INFO] [stderr] 218 | fn print_addr(&self) { [INFO] [stderr] | ^^^^^^^^^^^^^^^^^^^^ [INFO] [stderr] [INFO] [stderr] warning: variant is never constructed: `Penny` [INFO] [stderr] --> src/main.rs:231:5 [INFO] [stderr] | [INFO] [stderr] 231 | Penny, [INFO] [stderr] | ^^^^^ [INFO] [stderr] [INFO] [stderr] warning: variant is never constructed: `Nickel` [INFO] [stderr] --> src/main.rs:232:5 [INFO] [stderr] | [INFO] [stderr] 232 | Nickel, [INFO] [stderr] | ^^^^^^ [INFO] [stderr] [INFO] [stderr] warning: variant is never constructed: `Dime` [INFO] [stderr] --> src/main.rs:233:5 [INFO] [stderr] | [INFO] [stderr] 233 | Dime, [INFO] [stderr] | ^^^^ [INFO] [stderr] [INFO] [stderr] warning: unused variable: `s3` [INFO] [stderr] --> src/main.rs:39:9 [INFO] [stderr] | [INFO] [stderr] 39 | let s3 = s1.clone(); // 拷贝 [INFO] [stderr] | ^^ help: if this is intentional, prefix it with an underscore: `_s3` [INFO] [stderr] | [INFO] [stderr] = note: `#[warn(unused_variables)]` on by default [INFO] [stderr] [INFO] [stderr] warning: unused variable: `s2` [INFO] [stderr] --> src/main.rs:40:9 [INFO] [stderr] | [INFO] [stderr] 40 | let s2 = s1; // 指针传递，s1 被移除 [INFO] [stderr] | ^^ help: if this is intentional, prefix it with an underscore: `_s2` [INFO] [stderr] [INFO] [stderr] warning: unused variable: `s5` [INFO] [stderr] --> src/main.rs:45:9 [INFO] [stderr] | [INFO] [stderr] 45 | let s5 = s4; // 合法，因为是值传递 [INFO] [stderr] | ^^ help: if this is intentional, prefix it with an underscore: `_s5` [INFO] [stderr] [INFO] [stderr] warning: unused variable: `r1` [INFO] [stderr] --> src/main.rs:99:9 [INFO] [stderr] | [INFO] [stderr] 99 | let r1 = &mut s; [INFO] [stderr] | ^^ help: if this is intentional, prefix it with an underscore: `_r1` [INFO] [stderr] [INFO] [stderr] warning: unused variable: `r3` [INFO] [stderr] --> src/main.rs:103:13 [INFO] [stderr] | [INFO] [stderr] 103 | let r3 = &s2; [INFO] [stderr] | ^^ help: if this is intentional, prefix it with an underscore: `_r3` [INFO] [stderr] [INFO] [stderr] warning: unused variable: `r4` [INFO] [stderr] --> src/main.rs:105:9 [INFO] [stderr] | [INFO] [stderr] 105 | let r4 = &mut &s2; [INFO] [stderr] | ^^ help: if this is intentional, prefix it with an underscore: `_r4` [INFO] [stderr] [INFO] [stderr] warning: variable does not need to be mutable [INFO] [stderr] --> src/main.rs:97:9 [INFO] [stderr] | [INFO] [stderr] 97 | let mut s2 = String::from("world"); [INFO] [stderr] | ----^^ [INFO] [stderr] | | [INFO] [stderr] | help: remove this `mut` [INFO] [stderr] | [INFO] [stderr] = note: `#[warn(unused_mut)]` on by default [INFO] [stderr] [INFO] [stderr] warning: variable does not need to be mutable [INFO] [stderr] --> src/main.rs:120:9 [INFO] [stderr] | [INFO] [stderr] 120 | let mut s = String::from("hello world"); [INFO] [stderr] | ----^ [INFO] [stderr] | | [INFO] [stderr] | help: remove this `mut` [INFO] [stderr] [INFO] [stderr] warning: 34 warnings emitted [INFO] [stderr] [INFO] [stderr] warning: function is never used: `test1` [INFO] [stderr] --> src/main.rs:30:4 [INFO] [stderr] | [INFO] [stderr] 30 | fn test1 () { [INFO] [stderr] | ^^^^^ [INFO] [stderr] | [INFO] [stderr] = note: `#[warn(dead_code)]` on by default [INFO] [stderr] [INFO] [stderr] warning: function is never used: `test2` [INFO] [stderr] --> src/main.rs:37:4 [INFO] [stderr] | [INFO] [stderr] 37 | fn test2() { [INFO] [stderr] | ^^^^^ [INFO] [stderr] [INFO] [stderr] warning: function is never used: `test3` [INFO] [stderr] --> src/main.rs:55:4 [INFO] [stderr] | [INFO] [stderr] 55 | fn test3() { [INFO] [stderr] | ^^^^^ [INFO] [stderr] [INFO] [stderr] warning: function is never used: `test3_1` [INFO] [stderr] --> src/main.rs:66:4 [INFO] [stderr] | [INFO] [stderr] 66 | fn test3_1(sth: String) { [INFO] [stderr] | ^^^^^^^ [INFO] [stderr] [INFO] [stderr] warning: function is never used: `test3_2` [INFO] [stderr] --> src/main.rs:70:4 [INFO] [stderr] | [INFO] [stderr] 70 | fn test3_2(si: i32) { [INFO] [stderr] | ^^^^^^^ [INFO] [stderr] [INFO] [stderr] warning: function is never used: `test4` [INFO] [stderr] --> src/main.rs:75:4 [INFO] [stderr] | [INFO] [stderr] 75 | fn test4() { [INFO] [stderr] | ^^^^^ [INFO] [stderr] [INFO] [stderr] warning: function is never used: `test4_1` [INFO] [stderr] --> src/main.rs:82:4 [INFO] [stderr] | [INFO] [stderr] 82 | fn test4_1(s: &String) -> usize { [INFO] [stderr] | ^^^^^^^ [INFO] [stderr] [INFO] [stderr] warning: function is never used: `test5` [INFO] [stderr] --> src/main.rs:86:4 [INFO] [stderr] | [INFO] [stderr] 86 | fn test5() { [INFO] [stderr] | ^^^^^ [INFO] [stderr] [INFO] [stderr] warning: function is never used: `test5_1` [INFO] [stderr] --> src/main.rs:91:4 [INFO] [stderr] | [INFO] [stderr] 91 | fn test5_1(s: &mut String) { [INFO] [stderr] | ^^^^^^^ [INFO] [stderr] [INFO] [stderr] warning: function is never used: `test6` [INFO] [stderr] --> src/main.rs:95:4 [INFO] [stderr] | [INFO] [stderr] 95 | fn test6() { [INFO] [stderr] | ^^^^^ [INFO] [stderr] [INFO] [stderr] warning: function is never used: `test7` [INFO] [stderr] --> src/main.rs:110:4 [INFO] [stderr] | [INFO] [stderr] 110 | fn test7() { [INFO] [stderr] | ^^^^^ [INFO] [stderr] [INFO] [stderr] warning: function is never used: `test8` [INFO] [stderr] --> src/main.rs:119:4 [INFO] [stderr] | [INFO] [stderr] 119 | fn test8() { [INFO] [stderr] | ^^^^^ [INFO] [stderr] [INFO] [stderr] warning: function is never used: `test9` [INFO] [stderr] --> src/main.rs:131:4 [INFO] [stderr] | [INFO] [stderr] 131 | fn test9() { [INFO] [stderr] | ^^^^^ [INFO] [stderr] [INFO] [stderr] warning: function is never used: `test10` [INFO] [stderr] --> src/main.rs:147:4 [INFO] [stderr] | [INFO] [stderr] 147 | fn test10() { [INFO] [stderr] | ^^^^^^ [INFO] [stderr] [INFO] [stderr] warning: method is never used: `area` [INFO] [stderr] --> src/main.rs:167:5 [INFO] [stderr] | [INFO] [stderr] 167 | fn area(&mut self) { [INFO] [stderr] | ^^^^^^^^^^^^^^^^^^ [INFO] [stderr] [INFO] [stderr] warning: method is never used: `can_hold` [INFO] [stderr] --> src/main.rs:172:5 [INFO] [stderr] | [INFO] [stderr] 172 | fn can_hold(&self, other: &Rectangle) { [INFO] [stderr] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stderr] [INFO] [stderr] warning: method is never used: `square` [INFO] [stderr] --> src/main.rs:176:5 [INFO] [stderr] | [INFO] [stderr] 176 | fn square(size: u32) -> Rectangle { [INFO] [stderr] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stderr] [INFO] [stderr] warning: variant is never constructed: `V4` [INFO] [stderr] --> src/main.rs:184:5 [INFO] [stderr] | [INFO] [stderr] 184 | V4, [INFO] [stderr] | ^^ [INFO] [stderr] [INFO] [stderr] warning: variant is never constructed: `V6` [INFO] [stderr] --> src/main.rs:185:5 [INFO] [stderr] | [INFO] [stderr] 185 | V6, [INFO] [stderr] | ^^ [INFO] [stderr] [INFO] [stderr] warning: variant is never constructed: `V4` [INFO] [stderr] --> src/main.rs:189:5 [INFO] [stderr] | [INFO] [stderr] 189 | V4(u8, u8, u8, u8), // ip由4个字节组成 [INFO] [stderr] | ^^^^^^^^^^^^^^^^^^ [INFO] [stderr] [INFO] [stderr] warning: variant is never constructed: `V6` [INFO] [stderr] --> src/main.rs:190:5 [INFO] [stderr] | [INFO] [stderr] 190 | V6(String), // 枚举对象的构造函数，很像结构体 [INFO] [stderr] | ^^^^^^^^^^ [INFO] [stderr] [INFO] [stderr] warning: function is never used: `test11` [INFO] [stderr] --> src/main.rs:200:4 [INFO] [stderr] | [INFO] [stderr] 200 | fn test11() { [INFO] [stderr] | ^^^^^^ [INFO] [stderr] [INFO] [stderr] warning: method is never used: `print_addr` [INFO] [stderr] --> src/main.rs:218:5 [INFO] [stderr] | [INFO] [stderr] 218 | fn print_addr(&self) { [INFO] [stderr] | ^^^^^^^^^^^^^^^^^^^^ [INFO] [stderr] [INFO] [stderr] warning: variant is never constructed: `Penny` [INFO] [stderr] --> src/main.rs:231:5 [INFO] [stderr] | [INFO] [stderr] 231 | Penny, [INFO] [stderr] | ^^^^^ [INFO] [stderr] [INFO] [stderr] warning: variant is never constructed: `Nickel` [INFO] [stderr] --> src/main.rs:232:5 [INFO] [stderr] | [INFO] [stderr] 232 | Nickel, [INFO] [stderr] | ^^^^^^ [INFO] [stderr] [INFO] [stderr] warning: variant is never constructed: `Dime` [INFO] [stderr] --> src/main.rs:233:5 [INFO] [stderr] | [INFO] [stderr] 233 | Dime, [INFO] [stderr] | ^^^^ [INFO] [stderr] [INFO] [stderr] warning: 34 warnings emitted [INFO] [stderr] [INFO] [stderr] Finished dev [unoptimized + debuginfo] target(s) in 0.47s [INFO] running `"docker" "inspect" "30c7e7a249317b006d513aec36033c3d7622ee05606d039741cbf12a97708eae"` [INFO] running `"docker" "rm" "-f" "30c7e7a249317b006d513aec36033c3d7622ee05606d039741cbf12a97708eae"` [INFO] [stdout] 30c7e7a249317b006d513aec36033c3d7622ee05606d039741cbf12a97708eae