Dec 12 19:31:40.989 INFO testing zhenhuanlee/rust_learn against master#bd47d6825bf4090517549d33cfef10d3300b4a75 for pr-56550
Dec 12 19:31:40.989 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-56550/worker-2/master#bd47d6825bf4090517549d33cfef10d3300b4a75:/target:rw,Z" "-v" "/mnt/big/crater/work/local/test-source/worker-2/pr-56550/master#bd47d6825bf4090517549d33cfef10d3300b4a75:/source:ro,Z" "-v" "/mnt/big/crater/work/local/cargo-home:/cargo-home:ro,Z" "-v" "/mnt/big/crater/work/local/rustup-home:/rustup-home:ro,Z" "-e" "USER_ID=1000" "-e" "SOURCE_DIR=/source" "-e" "USER_ID=1000" "-e" "CMD=cargo +bd47d6825bf4090517549d33cfef10d3300b4a75-alt build --frozen" "-e" "CARGO_TARGET_DIR=/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/cargo-home" "-e" "RUSTUP_HOME=/rustup-home" "-m" "1536M" "--network" "none" "crater"`
Dec 12 19:31:41.365 INFO [stdout] 8c94cb94a0bfdde2dedcd8c284b37cc2344ffd416e96227c44f3f8cc6eafa982
Dec 12 19:31:41.368 INFO running `"docker" "start" "-a" "8c94cb94a0bfdde2dedcd8c284b37cc2344ffd416e96227c44f3f8cc6eafa982"`
Dec 12 19:31:41.781 INFO [stderr] usermod: no changes
Dec 12 19:31:41.809 INFO [stderr]    Compiling soo v0.1.0 (/source)
Dec 12 19:31:41.922 INFO [stderr] warning: unused variable: `s3`
Dec 12 19:31:41.922 INFO [stderr]   --> src/main.rs:39:9
Dec 12 19:31:41.922 INFO [stderr]    |
Dec 12 19:31:41.922 INFO [stderr] 39 |     let s3 = s1.clone(); // 拷贝
Dec 12 19:31:41.922 INFO [stderr]    |         ^^ help: consider using `_s3` instead
Dec 12 19:31:41.922 INFO [stderr]    |
Dec 12 19:31:41.922 INFO [stderr]    = note: #[warn(unused_variables)] on by default
Dec 12 19:31:41.922 INFO [stderr] 
Dec 12 19:31:41.922 INFO [stderr] warning: unused variable: `s2`
Dec 12 19:31:41.922 INFO [stderr]   --> src/main.rs:40:9
Dec 12 19:31:41.922 INFO [stderr]    |
Dec 12 19:31:41.922 INFO [stderr] 40 |     let s2 = s1;  // 指针传递，s1 被移除
Dec 12 19:31:41.922 INFO [stderr]    |         ^^ help: consider using `_s2` instead
Dec 12 19:31:41.922 INFO [stderr] 
Dec 12 19:31:41.922 INFO [stderr] warning: unused variable: `s5`
Dec 12 19:31:41.922 INFO [stderr]   --> src/main.rs:45:9
Dec 12 19:31:41.922 INFO [stderr]    |
Dec 12 19:31:41.922 INFO [stderr] 45 |     let s5 = s4;  // 合法，因为是值传递  
Dec 12 19:31:41.922 INFO [stderr]    |         ^^ help: consider using `_s5` instead
Dec 12 19:31:41.922 INFO [stderr] 
Dec 12 19:31:41.922 INFO [stderr] warning: unused variable: `r1`
Dec 12 19:31:41.922 INFO [stderr]   --> src/main.rs:99:9
Dec 12 19:31:41.922 INFO [stderr]    |
Dec 12 19:31:41.922 INFO [stderr] 99 |     let r1 = &mut s;
Dec 12 19:31:41.922 INFO [stderr]    |         ^^ help: consider using `_r1` instead
Dec 12 19:31:41.922 INFO [stderr] 
Dec 12 19:31:41.922 INFO [stderr] warning: unused variable: `r3`
Dec 12 19:31:41.922 INFO [stderr]    --> src/main.rs:103:13
Dec 12 19:31:41.922 INFO [stderr]     |
Dec 12 19:31:41.922 INFO [stderr] 103 |         let r3 = &s2;
Dec 12 19:31:41.922 INFO [stderr]     |             ^^ help: consider using `_r3` instead
Dec 12 19:31:41.922 INFO [stderr] 
Dec 12 19:31:41.922 INFO [stderr] warning: unused variable: `r4`
Dec 12 19:31:41.922 INFO [stderr]    --> src/main.rs:105:9
Dec 12 19:31:41.922 INFO [stderr]     |
Dec 12 19:31:41.922 INFO [stderr] 105 |     let r4 = &mut &s2;
Dec 12 19:31:41.922 INFO [stderr]     |         ^^ help: consider using `_r4` instead
Dec 12 19:31:41.922 INFO [stderr] 
Dec 12 19:31:41.933 INFO [stderr] warning: variable does not need to be mutable
Dec 12 19:31:41.933 INFO [stderr]   --> src/main.rs:97:9
Dec 12 19:31:41.933 INFO [stderr]    |
Dec 12 19:31:41.933 INFO [stderr] 97 |     let mut s2 = String::from("world");
Dec 12 19:31:41.933 INFO [stderr]    |         ----^^
Dec 12 19:31:41.933 INFO [stderr]    |         |
Dec 12 19:31:41.933 INFO [stderr]    |         help: remove this `mut`
Dec 12 19:31:41.933 INFO [stderr]    |
Dec 12 19:31:41.933 INFO [stderr]    = note: #[warn(unused_mut)] on by default
Dec 12 19:31:41.933 INFO [stderr] 
Dec 12 19:31:41.939 INFO [stderr] warning: variable does not need to be mutable
Dec 12 19:31:41.939 INFO [stderr]    --> src/main.rs:120:9
Dec 12 19:31:41.939 INFO [stderr]     |
Dec 12 19:31:41.939 INFO [stderr] 120 |     let mut s = String::from("hello world");
Dec 12 19:31:41.939 INFO [stderr]     |         ----^
Dec 12 19:31:41.939 INFO [stderr]     |         |
Dec 12 19:31:41.939 INFO [stderr]     |         help: remove this `mut`
Dec 12 19:31:41.939 INFO [stderr] 
Dec 12 19:31:41.945 INFO [stderr] warning: function is never used: `test1`
Dec 12 19:31:41.945 INFO [stderr]   --> src/main.rs:30:1
Dec 12 19:31:41.945 INFO [stderr]    |
Dec 12 19:31:41.945 INFO [stderr] 30 | fn test1 () {
Dec 12 19:31:41.945 INFO [stderr]    | ^^^^^^^^^^^
Dec 12 19:31:41.945 INFO [stderr]    |
Dec 12 19:31:41.945 INFO [stderr]    = note: #[warn(dead_code)] on by default
Dec 12 19:31:41.945 INFO [stderr] 
Dec 12 19:31:41.945 INFO [stderr] warning: function is never used: `test2`
Dec 12 19:31:41.945 INFO [stderr]   --> src/main.rs:37:1
Dec 12 19:31:41.945 INFO [stderr]    |
Dec 12 19:31:41.945 INFO [stderr] 37 | fn test2() {
Dec 12 19:31:41.945 INFO [stderr]    | ^^^^^^^^^^
Dec 12 19:31:41.945 INFO [stderr] 
Dec 12 19:31:41.946 INFO [stderr] warning: function is never used: `test3`
Dec 12 19:31:41.946 INFO [stderr]   --> src/main.rs:55:1
Dec 12 19:31:41.946 INFO [stderr]    |
Dec 12 19:31:41.946 INFO [stderr] 55 | fn test3() {
Dec 12 19:31:41.946 INFO [stderr]    | ^^^^^^^^^^
Dec 12 19:31:41.946 INFO [stderr] 
Dec 12 19:31:41.946 INFO [stderr] warning: function is never used: `test3_1`
Dec 12 19:31:41.946 INFO [stderr]   --> src/main.rs:66:1
Dec 12 19:31:41.946 INFO [stderr]    |
Dec 12 19:31:41.946 INFO [stderr] 66 | fn test3_1(sth: String) {
Dec 12 19:31:41.946 INFO [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^
Dec 12 19:31:41.946 INFO [stderr] 
Dec 12 19:31:41.946 INFO [stderr] warning: function is never used: `test3_2`
Dec 12 19:31:41.946 INFO [stderr]   --> src/main.rs:70:1
Dec 12 19:31:41.946 INFO [stderr]    |
Dec 12 19:31:41.946 INFO [stderr] 70 | fn test3_2(si: i32) {
Dec 12 19:31:41.946 INFO [stderr]    | ^^^^^^^^^^^^^^^^^^^
Dec 12 19:31:41.946 INFO [stderr] 
Dec 12 19:31:41.946 INFO [stderr] warning: function is never used: `test4`
Dec 12 19:31:41.946 INFO [stderr]   --> src/main.rs:75:1
Dec 12 19:31:41.946 INFO [stderr]    |
Dec 12 19:31:41.946 INFO [stderr] 75 | fn test4() {
Dec 12 19:31:41.946 INFO [stderr]    | ^^^^^^^^^^
Dec 12 19:31:41.946 INFO [stderr] 
Dec 12 19:31:41.946 INFO [stderr] warning: function is never used: `test4_1`
Dec 12 19:31:41.946 INFO [stderr]   --> src/main.rs:82:1
Dec 12 19:31:41.946 INFO [stderr]    |
Dec 12 19:31:41.946 INFO [stderr] 82 | fn test4_1(s: &String) -> usize {
Dec 12 19:31:41.946 INFO [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 12 19:31:41.946 INFO [stderr] 
Dec 12 19:31:41.946 INFO [stderr] warning: function is never used: `test5`
Dec 12 19:31:41.946 INFO [stderr]   --> src/main.rs:86:1
Dec 12 19:31:41.946 INFO [stderr]    |
Dec 12 19:31:41.946 INFO [stderr] 86 | fn test5() {
Dec 12 19:31:41.946 INFO [stderr]    | ^^^^^^^^^^
Dec 12 19:31:41.946 INFO [stderr] 
Dec 12 19:31:41.946 INFO [stderr] warning: function is never used: `test5_1`
Dec 12 19:31:41.946 INFO [stderr]   --> src/main.rs:91:1
Dec 12 19:31:41.946 INFO [stderr]    |
Dec 12 19:31:41.946 INFO [stderr] 91 | fn test5_1(s: &mut String) {
Dec 12 19:31:41.946 INFO [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 12 19:31:41.946 INFO [stderr] 
Dec 12 19:31:41.946 INFO [stderr] warning: function is never used: `test6`
Dec 12 19:31:41.946 INFO [stderr]   --> src/main.rs:95:1
Dec 12 19:31:41.946 INFO [stderr]    |
Dec 12 19:31:41.946 INFO [stderr] 95 | fn test6() {
Dec 12 19:31:41.946 INFO [stderr]    | ^^^^^^^^^^
Dec 12 19:31:41.946 INFO [stderr] 
Dec 12 19:31:41.946 INFO [stderr] warning: function is never used: `test7`
Dec 12 19:31:41.946 INFO [stderr]    --> src/main.rs:110:1
Dec 12 19:31:41.946 INFO [stderr]     |
Dec 12 19:31:41.946 INFO [stderr] 110 | fn test7() {
Dec 12 19:31:41.946 INFO [stderr]     | ^^^^^^^^^^
Dec 12 19:31:41.946 INFO [stderr] 
Dec 12 19:31:41.946 INFO [stderr] warning: function is never used: `test8`
Dec 12 19:31:41.946 INFO [stderr]    --> src/main.rs:119:1
Dec 12 19:31:41.946 INFO [stderr]     |
Dec 12 19:31:41.947 INFO [stderr] 119 | fn test8() {
Dec 12 19:31:41.947 INFO [stderr]     | ^^^^^^^^^^
Dec 12 19:31:41.947 INFO [stderr] 
Dec 12 19:31:41.947 INFO [stderr] warning: function is never used: `test9`
Dec 12 19:31:41.947 INFO [stderr]    --> src/main.rs:131:1
Dec 12 19:31:41.947 INFO [stderr]     |
Dec 12 19:31:41.947 INFO [stderr] 131 | fn test9() {
Dec 12 19:31:41.947 INFO [stderr]     | ^^^^^^^^^^
Dec 12 19:31:41.947 INFO [stderr] 
Dec 12 19:31:41.947 INFO [stderr] warning: struct is never constructed: `User`
Dec 12 19:31:41.947 INFO [stderr]    --> src/main.rs:141:1
Dec 12 19:31:41.947 INFO [stderr]     |
Dec 12 19:31:41.947 INFO [stderr] 141 | struct User {
Dec 12 19:31:41.947 INFO [stderr]     | ^^^^^^^^^^^
Dec 12 19:31:41.947 INFO [stderr] 
Dec 12 19:31:41.947 INFO [stderr] warning: function is never used: `test10`
Dec 12 19:31:41.947 INFO [stderr]    --> src/main.rs:147:1
Dec 12 19:31:41.947 INFO [stderr]     |
Dec 12 19:31:41.947 INFO [stderr] 147 | fn test10() {
Dec 12 19:31:41.947 INFO [stderr]     | ^^^^^^^^^^^
Dec 12 19:31:41.947 INFO [stderr] 
Dec 12 19:31:41.947 INFO [stderr] warning: struct is never constructed: `Rectangle`
Dec 12 19:31:41.947 INFO [stderr]    --> src/main.rs:161:1
Dec 12 19:31:41.947 INFO [stderr]     |
Dec 12 19:31:41.947 INFO [stderr] 161 | struct Rectangle {
Dec 12 19:31:41.947 INFO [stderr]     | ^^^^^^^^^^^^^^^^
Dec 12 19:31:41.947 INFO [stderr] 
Dec 12 19:31:41.947 INFO [stderr] warning: method is never used: `area`
Dec 12 19:31:41.947 INFO [stderr]    --> src/main.rs:167:5
Dec 12 19:31:41.947 INFO [stderr]     |
Dec 12 19:31:41.947 INFO [stderr] 167 |     fn area(&mut self) {
Dec 12 19:31:41.947 INFO [stderr]     |     ^^^^^^^^^^^^^^^^^^
Dec 12 19:31:41.947 INFO [stderr] 
Dec 12 19:31:41.947 INFO [stderr] warning: method is never used: `can_hold`
Dec 12 19:31:41.947 INFO [stderr]    --> src/main.rs:172:5
Dec 12 19:31:41.947 INFO [stderr]     |
Dec 12 19:31:41.947 INFO [stderr] 172 |     fn can_hold(&self, other: &Rectangle) {
Dec 12 19:31:41.947 INFO [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 12 19:31:41.947 INFO [stderr] 
Dec 12 19:31:41.947 INFO [stderr] warning: method is never used: `square`
Dec 12 19:31:41.947 INFO [stderr]    --> src/main.rs:176:5
Dec 12 19:31:41.947 INFO [stderr]     |
Dec 12 19:31:41.947 INFO [stderr] 176 |     fn square(size: u32) -> Rectangle {
Dec 12 19:31:41.947 INFO [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 12 19:31:41.947 INFO [stderr] 
Dec 12 19:31:41.947 INFO [stderr] warning: enum is never used: `IpAddrKind`
Dec 12 19:31:41.947 INFO [stderr]    --> src/main.rs:183:1
Dec 12 19:31:41.947 INFO [stderr]     |
Dec 12 19:31:41.947 INFO [stderr] 183 | enum IpAddrKind {
Dec 12 19:31:41.947 INFO [stderr]     | ^^^^^^^^^^^^^^^
Dec 12 19:31:41.947 INFO [stderr] 
Dec 12 19:31:41.947 INFO [stderr] warning: enum is never used: `IpAddrKind2`
Dec 12 19:31:41.947 INFO [stderr]    --> src/main.rs:188:1
Dec 12 19:31:41.947 INFO [stderr]     |
Dec 12 19:31:41.947 INFO [stderr] 188 | enum IpAddrKind2 {
Dec 12 19:31:41.947 INFO [stderr]     | ^^^^^^^^^^^^^^^^
Dec 12 19:31:41.947 INFO [stderr] 
Dec 12 19:31:41.947 INFO [stderr] warning: struct is never constructed: `IpAddr`
Dec 12 19:31:41.947 INFO [stderr]    --> src/main.rs:195:1
Dec 12 19:31:41.947 INFO [stderr]     |
Dec 12 19:31:41.947 INFO [stderr] 195 | struct IpAddr {
Dec 12 19:31:41.947 INFO [stderr]     | ^^^^^^^^^^^^^
Dec 12 19:31:41.947 INFO [stderr] 
Dec 12 19:31:41.947 INFO [stderr] warning: function is never used: `test11`
Dec 12 19:31:41.947 INFO [stderr]    --> src/main.rs:200:1
Dec 12 19:31:41.947 INFO [stderr]     |
Dec 12 19:31:41.947 INFO [stderr] 200 | fn test11() {
Dec 12 19:31:41.947 INFO [stderr]     | ^^^^^^^^^^^
Dec 12 19:31:41.947 INFO [stderr] 
Dec 12 19:31:41.947 INFO [stderr] warning: method is never used: `print_addr`
Dec 12 19:31:41.947 INFO [stderr]    --> src/main.rs:218:5
Dec 12 19:31:41.947 INFO [stderr]     |
Dec 12 19:31:41.947 INFO [stderr] 218 |     fn print_addr(&self) {
Dec 12 19:31:41.947 INFO [stderr]     |     ^^^^^^^^^^^^^^^^^^^^
Dec 12 19:31:41.947 INFO [stderr] 
Dec 12 19:31:41.947 INFO [stderr] warning: variant is never constructed: `Penny`
Dec 12 19:31:41.947 INFO [stderr]    --> src/main.rs:231:5
Dec 12 19:31:41.947 INFO [stderr]     |
Dec 12 19:31:41.947 INFO [stderr] 231 |     Penny,
Dec 12 19:31:41.947 INFO [stderr]     |     ^^^^^
Dec 12 19:31:41.947 INFO [stderr] 
Dec 12 19:31:41.947 INFO [stderr] warning: variant is never constructed: `Nickel`
Dec 12 19:31:41.947 INFO [stderr]    --> src/main.rs:232:5
Dec 12 19:31:41.947 INFO [stderr]     |
Dec 12 19:31:41.947 INFO [stderr] 232 |     Nickel,
Dec 12 19:31:41.947 INFO [stderr]     |     ^^^^^^
Dec 12 19:31:41.947 INFO [stderr] 
Dec 12 19:31:41.948 INFO [stderr] warning: variant is never constructed: `Dime`
Dec 12 19:31:41.948 INFO [stderr]    --> src/main.rs:233:5
Dec 12 19:31:41.948 INFO [stderr]     |
Dec 12 19:31:41.948 INFO [stderr] 233 |     Dime,
Dec 12 19:31:41.948 INFO [stderr]     |     ^^^^
Dec 12 19:31:41.948 INFO [stderr] 
Dec 12 19:31:42.120 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.32s
Dec 12 19:31:42.122 INFO [stderr] su: No module specific data is present
Dec 12 19:31:42.465 INFO running `"docker" "inspect" "8c94cb94a0bfdde2dedcd8c284b37cc2344ffd416e96227c44f3f8cc6eafa982"`
Dec 12 19:31:42.519 INFO running `"docker" "rm" "-f" "8c94cb94a0bfdde2dedcd8c284b37cc2344ffd416e96227c44f3f8cc6eafa982"`
Dec 12 19:31:42.595 INFO [stdout] 8c94cb94a0bfdde2dedcd8c284b37cc2344ffd416e96227c44f3f8cc6eafa982
Dec 12 19:31:42.596 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-56550/worker-2/master#bd47d6825bf4090517549d33cfef10d3300b4a75:/target:rw,Z" "-v" "/mnt/big/crater/work/local/test-source/worker-2/pr-56550/master#bd47d6825bf4090517549d33cfef10d3300b4a75:/source:ro,Z" "-v" "/mnt/big/crater/work/local/cargo-home:/cargo-home:ro,Z" "-v" "/mnt/big/crater/work/local/rustup-home:/rustup-home:ro,Z" "-e" "USER_ID=1000" "-e" "SOURCE_DIR=/source" "-e" "USER_ID=1000" "-e" "CMD=cargo +bd47d6825bf4090517549d33cfef10d3300b4a75-alt test --frozen --no-run" "-e" "CARGO_TARGET_DIR=/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/cargo-home" "-e" "RUSTUP_HOME=/rustup-home" "-m" "1536M" "--network" "none" "crater"`
Dec 12 19:31:42.749 INFO [stdout] 34bf446edc17e094e26abf35196dfabc89202f863768362070be3abbbf64ee30
Dec 12 19:31:42.751 INFO running `"docker" "start" "-a" "34bf446edc17e094e26abf35196dfabc89202f863768362070be3abbbf64ee30"`
Dec 12 19:31:43.121 INFO [stderr] usermod: no changes
Dec 12 19:31:43.141 INFO [stderr]    Compiling soo v0.1.0 (/source)
Dec 12 19:31:43.310 INFO [stderr] warning: unused variable: `s3`
Dec 12 19:31:43.310 INFO [stderr]   --> src/main.rs:39:9
Dec 12 19:31:43.310 INFO [stderr]    |
Dec 12 19:31:43.310 INFO [stderr] 39 |     let s3 = s1.clone(); // 拷贝
Dec 12 19:31:43.310 INFO [stderr]    |         ^^ help: consider using `_s3` instead
Dec 12 19:31:43.310 INFO [stderr]    |
Dec 12 19:31:43.310 INFO [stderr]    = note: #[warn(unused_variables)] on by default
Dec 12 19:31:43.310 INFO [stderr] 
Dec 12 19:31:43.310 INFO [stderr] warning: unused variable: `s2`
Dec 12 19:31:43.310 INFO [stderr]   --> src/main.rs:40:9
Dec 12 19:31:43.310 INFO [stderr]    |
Dec 12 19:31:43.310 INFO [stderr] 40 |     let s2 = s1;  // 指针传递，s1 被移除
Dec 12 19:31:43.310 INFO [stderr]    |         ^^ help: consider using `_s2` instead
Dec 12 19:31:43.310 INFO [stderr] 
Dec 12 19:31:43.310 INFO [stderr] warning: unused variable: `s5`
Dec 12 19:31:43.310 INFO [stderr]   --> src/main.rs:45:9
Dec 12 19:31:43.310 INFO [stderr]    |
Dec 12 19:31:43.310 INFO [stderr] 45 |     let s5 = s4;  // 合法，因为是值传递  
Dec 12 19:31:43.310 INFO [stderr]    |         ^^ help: consider using `_s5` instead
Dec 12 19:31:43.310 INFO [stderr] 
Dec 12 19:31:43.310 INFO [stderr] warning: unused variable: `r1`
Dec 12 19:31:43.310 INFO [stderr]   --> src/main.rs:99:9
Dec 12 19:31:43.310 INFO [stderr]    |
Dec 12 19:31:43.310 INFO [stderr] 99 |     let r1 = &mut s;
Dec 12 19:31:43.310 INFO [stderr]    |         ^^ help: consider using `_r1` instead
Dec 12 19:31:43.310 INFO [stderr] 
Dec 12 19:31:43.310 INFO [stderr] warning: unused variable: `r3`
Dec 12 19:31:43.310 INFO [stderr]    --> src/main.rs:103:13
Dec 12 19:31:43.310 INFO [stderr]     |
Dec 12 19:31:43.310 INFO [stderr] 103 |         let r3 = &s2;
Dec 12 19:31:43.310 INFO [stderr]     |             ^^ help: consider using `_r3` instead
Dec 12 19:31:43.310 INFO [stderr] 
Dec 12 19:31:43.310 INFO [stderr] warning: unused variable: `r4`
Dec 12 19:31:43.310 INFO [stderr]    --> src/main.rs:105:9
Dec 12 19:31:43.310 INFO [stderr]     |
Dec 12 19:31:43.310 INFO [stderr] 105 |     let r4 = &mut &s2;
Dec 12 19:31:43.310 INFO [stderr]     |         ^^ help: consider using `_r4` instead
Dec 12 19:31:43.310 INFO [stderr] 
Dec 12 19:31:43.310 INFO [stderr] warning: variable does not need to be mutable
Dec 12 19:31:43.311 INFO [stderr]   --> src/main.rs:97:9
Dec 12 19:31:43.311 INFO [stderr]    |
Dec 12 19:31:43.311 INFO [stderr] 97 |     let mut s2 = String::from("world");
Dec 12 19:31:43.311 INFO [stderr]    |         ----^^
Dec 12 19:31:43.311 INFO [stderr]    |         |
Dec 12 19:31:43.311 INFO [stderr]    |         help: remove this `mut`
Dec 12 19:31:43.311 INFO [stderr]    |
Dec 12 19:31:43.311 INFO [stderr]    = note: #[warn(unused_mut)] on by default
Dec 12 19:31:43.311 INFO [stderr] 
Dec 12 19:31:43.311 INFO [stderr] warning: variable does not need to be mutable
Dec 12 19:31:43.311 INFO [stderr]    --> src/main.rs:120:9
Dec 12 19:31:43.311 INFO [stderr]     |
Dec 12 19:31:43.311 INFO [stderr] 120 |     let mut s = String::from("hello world");
Dec 12 19:31:43.311 INFO [stderr]     |         ----^
Dec 12 19:31:43.311 INFO [stderr]     |         |
Dec 12 19:31:43.311 INFO [stderr]     |         help: remove this `mut`
Dec 12 19:31:43.311 INFO [stderr] 
Dec 12 19:31:43.327 INFO [stderr] warning: function is never used: `test1`
Dec 12 19:31:43.327 INFO [stderr]   --> src/main.rs:30:1
Dec 12 19:31:43.327 INFO [stderr]    |
Dec 12 19:31:43.327 INFO [stderr] 30 | fn test1 () {
Dec 12 19:31:43.327 INFO [stderr]    | ^^^^^^^^^^^
Dec 12 19:31:43.327 INFO [stderr]    |
Dec 12 19:31:43.327 INFO [stderr]    = note: #[warn(dead_code)] on by default
Dec 12 19:31:43.327 INFO [stderr] 
Dec 12 19:31:43.327 INFO [stderr] warning: function is never used: `test2`
Dec 12 19:31:43.327 INFO [stderr]   --> src/main.rs:37:1
Dec 12 19:31:43.327 INFO [stderr]    |
Dec 12 19:31:43.327 INFO [stderr] 37 | fn test2() {
Dec 12 19:31:43.327 INFO [stderr]    | ^^^^^^^^^^
Dec 12 19:31:43.327 INFO [stderr] 
Dec 12 19:31:43.327 INFO [stderr] warning: function is never used: `test3`
Dec 12 19:31:43.327 INFO [stderr]   --> src/main.rs:55:1
Dec 12 19:31:43.327 INFO [stderr]    |
Dec 12 19:31:43.327 INFO [stderr] 55 | fn test3() {
Dec 12 19:31:43.327 INFO [stderr]    | ^^^^^^^^^^
Dec 12 19:31:43.327 INFO [stderr] 
Dec 12 19:31:43.327 INFO [stderr] warning: function is never used: `test3_1`
Dec 12 19:31:43.327 INFO [stderr]   --> src/main.rs:66:1
Dec 12 19:31:43.327 INFO [stderr]    |
Dec 12 19:31:43.327 INFO [stderr] 66 | fn test3_1(sth: String) {
Dec 12 19:31:43.327 INFO [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^
Dec 12 19:31:43.327 INFO [stderr] 
Dec 12 19:31:43.327 INFO [stderr] warning: function is never used: `test3_2`
Dec 12 19:31:43.327 INFO [stderr]   --> src/main.rs:70:1
Dec 12 19:31:43.327 INFO [stderr]    |
Dec 12 19:31:43.327 INFO [stderr] 70 | fn test3_2(si: i32) {
Dec 12 19:31:43.327 INFO [stderr]    | ^^^^^^^^^^^^^^^^^^^
Dec 12 19:31:43.327 INFO [stderr] 
Dec 12 19:31:43.327 INFO [stderr] warning: function is never used: `test4`
Dec 12 19:31:43.328 INFO [stderr]   --> src/main.rs:75:1
Dec 12 19:31:43.328 INFO [stderr]    |
Dec 12 19:31:43.328 INFO [stderr] 75 | fn test4() {
Dec 12 19:31:43.328 INFO [stderr]    | ^^^^^^^^^^
Dec 12 19:31:43.328 INFO [stderr] 
Dec 12 19:31:43.328 INFO [stderr] warning: function is never used: `test4_1`
Dec 12 19:31:43.328 INFO [stderr]   --> src/main.rs:82:1
Dec 12 19:31:43.328 INFO [stderr]    |
Dec 12 19:31:43.328 INFO [stderr] 82 | fn test4_1(s: &String) -> usize {
Dec 12 19:31:43.328 INFO [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 12 19:31:43.328 INFO [stderr] 
Dec 12 19:31:43.328 INFO [stderr] warning: function is never used: `test5`
Dec 12 19:31:43.328 INFO [stderr]   --> src/main.rs:86:1
Dec 12 19:31:43.328 INFO [stderr]    |
Dec 12 19:31:43.328 INFO [stderr] 86 | fn test5() {
Dec 12 19:31:43.328 INFO [stderr]    | ^^^^^^^^^^
Dec 12 19:31:43.328 INFO [stderr] 
Dec 12 19:31:43.328 INFO [stderr] warning: function is never used: `test5_1`
Dec 12 19:31:43.328 INFO [stderr]   --> src/main.rs:91:1
Dec 12 19:31:43.328 INFO [stderr]    |
Dec 12 19:31:43.328 INFO [stderr] 91 | fn test5_1(s: &mut String) {
Dec 12 19:31:43.328 INFO [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 12 19:31:43.328 INFO [stderr] 
Dec 12 19:31:43.328 INFO [stderr] warning: function is never used: `test6`
Dec 12 19:31:43.328 INFO [stderr]   --> src/main.rs:95:1
Dec 12 19:31:43.328 INFO [stderr]    |
Dec 12 19:31:43.328 INFO [stderr] 95 | fn test6() {
Dec 12 19:31:43.328 INFO [stderr]    | ^^^^^^^^^^
Dec 12 19:31:43.328 INFO [stderr] 
Dec 12 19:31:43.328 INFO [stderr] warning: function is never used: `test7`
Dec 12 19:31:43.328 INFO [stderr]    --> src/main.rs:110:1
Dec 12 19:31:43.328 INFO [stderr]     |
Dec 12 19:31:43.328 INFO [stderr] 110 | fn test7() {
Dec 12 19:31:43.328 INFO [stderr]     | ^^^^^^^^^^
Dec 12 19:31:43.328 INFO [stderr] 
Dec 12 19:31:43.328 INFO [stderr] warning: function is never used: `test8`
Dec 12 19:31:43.328 INFO [stderr]    --> src/main.rs:119:1
Dec 12 19:31:43.328 INFO [stderr]     |
Dec 12 19:31:43.328 INFO [stderr] 119 | fn test8() {
Dec 12 19:31:43.328 INFO [stderr]     | ^^^^^^^^^^
Dec 12 19:31:43.328 INFO [stderr] 
Dec 12 19:31:43.328 INFO [stderr] warning: function is never used: `test9`
Dec 12 19:31:43.328 INFO [stderr]    --> src/main.rs:131:1
Dec 12 19:31:43.328 INFO [stderr]     |
Dec 12 19:31:43.328 INFO [stderr] 131 | fn test9() {
Dec 12 19:31:43.328 INFO [stderr]     | ^^^^^^^^^^
Dec 12 19:31:43.328 INFO [stderr] 
Dec 12 19:31:43.328 INFO [stderr] warning: struct is never constructed: `User`
Dec 12 19:31:43.328 INFO [stderr]    --> src/main.rs:141:1
Dec 12 19:31:43.328 INFO [stderr]     |
Dec 12 19:31:43.328 INFO [stderr] 141 | struct User {
Dec 12 19:31:43.328 INFO [stderr]     | ^^^^^^^^^^^
Dec 12 19:31:43.328 INFO [stderr] 
Dec 12 19:31:43.328 INFO [stderr] warning: function is never used: `test10`
Dec 12 19:31:43.328 INFO [stderr]    --> src/main.rs:147:1
Dec 12 19:31:43.328 INFO [stderr]     |
Dec 12 19:31:43.328 INFO [stderr] 147 | fn test10() {
Dec 12 19:31:43.328 INFO [stderr]     | ^^^^^^^^^^^
Dec 12 19:31:43.328 INFO [stderr] 
Dec 12 19:31:43.328 INFO [stderr] warning: struct is never constructed: `Rectangle`
Dec 12 19:31:43.328 INFO [stderr]    --> src/main.rs:161:1
Dec 12 19:31:43.328 INFO [stderr]     |
Dec 12 19:31:43.328 INFO [stderr] 161 | struct Rectangle {
Dec 12 19:31:43.328 INFO [stderr]     | ^^^^^^^^^^^^^^^^
Dec 12 19:31:43.328 INFO [stderr] 
Dec 12 19:31:43.328 INFO [stderr] warning: method is never used: `area`
Dec 12 19:31:43.328 INFO [stderr]    --> src/main.rs:167:5
Dec 12 19:31:43.328 INFO [stderr]     |
Dec 12 19:31:43.328 INFO [stderr] 167 |     fn area(&mut self) {
Dec 12 19:31:43.328 INFO [stderr]     |     ^^^^^^^^^^^^^^^^^^
Dec 12 19:31:43.328 INFO [stderr] 
Dec 12 19:31:43.329 INFO [stderr] warning: method is never used: `can_hold`
Dec 12 19:31:43.329 INFO [stderr]    --> src/main.rs:172:5
Dec 12 19:31:43.329 INFO [stderr]     |
Dec 12 19:31:43.329 INFO [stderr] 172 |     fn can_hold(&self, other: &Rectangle) {
Dec 12 19:31:43.329 INFO [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 12 19:31:43.329 INFO [stderr] 
Dec 12 19:31:43.329 INFO [stderr] warning: method is never used: `square`
Dec 12 19:31:43.329 INFO [stderr]    --> src/main.rs:176:5
Dec 12 19:31:43.329 INFO [stderr]     |
Dec 12 19:31:43.329 INFO [stderr] 176 |     fn square(size: u32) -> Rectangle {
Dec 12 19:31:43.329 INFO [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 12 19:31:43.329 INFO [stderr] 
Dec 12 19:31:43.329 INFO [stderr] warning: enum is never used: `IpAddrKind`
Dec 12 19:31:43.329 INFO [stderr]    --> src/main.rs:183:1
Dec 12 19:31:43.329 INFO [stderr]     |
Dec 12 19:31:43.329 INFO [stderr] 183 | enum IpAddrKind {
Dec 12 19:31:43.329 INFO [stderr]     | ^^^^^^^^^^^^^^^
Dec 12 19:31:43.329 INFO [stderr] 
Dec 12 19:31:43.329 INFO [stderr] warning: enum is never used: `IpAddrKind2`
Dec 12 19:31:43.329 INFO [stderr]    --> src/main.rs:188:1
Dec 12 19:31:43.329 INFO [stderr]     |
Dec 12 19:31:43.329 INFO [stderr] 188 | enum IpAddrKind2 {
Dec 12 19:31:43.329 INFO [stderr]     | ^^^^^^^^^^^^^^^^
Dec 12 19:31:43.329 INFO [stderr] 
Dec 12 19:31:43.329 INFO [stderr] warning: struct is never constructed: `IpAddr`
Dec 12 19:31:43.329 INFO [stderr]    --> src/main.rs:195:1
Dec 12 19:31:43.329 INFO [stderr]     |
Dec 12 19:31:43.329 INFO [stderr] 195 | struct IpAddr {
Dec 12 19:31:43.329 INFO [stderr]     | ^^^^^^^^^^^^^
Dec 12 19:31:43.329 INFO [stderr] 
Dec 12 19:31:43.329 INFO [stderr] warning: function is never used: `test11`
Dec 12 19:31:43.329 INFO [stderr]    --> src/main.rs:200:1
Dec 12 19:31:43.329 INFO [stderr]     |
Dec 12 19:31:43.329 INFO [stderr] 200 | fn test11() {
Dec 12 19:31:43.329 INFO [stderr]     | ^^^^^^^^^^^
Dec 12 19:31:43.329 INFO [stderr] 
Dec 12 19:31:43.329 INFO [stderr] warning: method is never used: `print_addr`
Dec 12 19:31:43.329 INFO [stderr]    --> src/main.rs:218:5
Dec 12 19:31:43.329 INFO [stderr]     |
Dec 12 19:31:43.329 INFO [stderr] 218 |     fn print_addr(&self) {
Dec 12 19:31:43.329 INFO [stderr]     |     ^^^^^^^^^^^^^^^^^^^^
Dec 12 19:31:43.329 INFO [stderr] 
Dec 12 19:31:43.329 INFO [stderr] warning: variant is never constructed: `Penny`
Dec 12 19:31:43.329 INFO [stderr]    --> src/main.rs:231:5
Dec 12 19:31:43.329 INFO [stderr]     |
Dec 12 19:31:43.329 INFO [stderr] 231 |     Penny,
Dec 12 19:31:43.329 INFO [stderr]     |     ^^^^^
Dec 12 19:31:43.329 INFO [stderr] 
Dec 12 19:31:43.329 INFO [stderr] warning: variant is never constructed: `Nickel`
Dec 12 19:31:43.329 INFO [stderr]    --> src/main.rs:232:5
Dec 12 19:31:43.329 INFO [stderr]     |
Dec 12 19:31:43.329 INFO [stderr] 232 |     Nickel,
Dec 12 19:31:43.329 INFO [stderr]     |     ^^^^^^
Dec 12 19:31:43.329 INFO [stderr] 
Dec 12 19:31:43.329 INFO [stderr] warning: variant is never constructed: `Dime`
Dec 12 19:31:43.329 INFO [stderr]    --> src/main.rs:233:5
Dec 12 19:31:43.329 INFO [stderr]     |
Dec 12 19:31:43.329 INFO [stderr] 233 |     Dime,
Dec 12 19:31:43.329 INFO [stderr]     |     ^^^^
Dec 12 19:31:43.329 INFO [stderr] 
Dec 12 19:31:43.681 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.50s
Dec 12 19:31:43.683 INFO [stderr] su: No module specific data is present
Dec 12 19:31:44.504 INFO running `"docker" "inspect" "34bf446edc17e094e26abf35196dfabc89202f863768362070be3abbbf64ee30"`
Dec 12 19:31:45.053 INFO running `"docker" "rm" "-f" "34bf446edc17e094e26abf35196dfabc89202f863768362070be3abbbf64ee30"`
Dec 12 19:31:45.258 INFO [stdout] 34bf446edc17e094e26abf35196dfabc89202f863768362070be3abbbf64ee30
Dec 12 19:31:45.267 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-56550/worker-2/master#bd47d6825bf4090517549d33cfef10d3300b4a75:/target:rw,Z" "-v" "/mnt/big/crater/work/local/test-source/worker-2/pr-56550/master#bd47d6825bf4090517549d33cfef10d3300b4a75:/source:ro,Z" "-v" "/mnt/big/crater/work/local/cargo-home:/cargo-home:ro,Z" "-v" "/mnt/big/crater/work/local/rustup-home:/rustup-home:ro,Z" "-e" "USER_ID=1000" "-e" "SOURCE_DIR=/source" "-e" "USER_ID=1000" "-e" "CMD=cargo +bd47d6825bf4090517549d33cfef10d3300b4a75-alt test --frozen" "-e" "CARGO_TARGET_DIR=/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/cargo-home" "-e" "RUSTUP_HOME=/rustup-home" "-m" "1536M" "--network" "none" "crater"`
Dec 12 19:31:45.723 INFO [stdout] 3875ee7037c1e5f7e12a878b7e2353510e57a85c9d7afe28b9ad58ec786d8035
Dec 12 19:31:45.730 INFO running `"docker" "start" "-a" "3875ee7037c1e5f7e12a878b7e2353510e57a85c9d7afe28b9ad58ec786d8035"`
Dec 12 19:31:46.439 INFO [stderr] usermod: no changes
Dec 12 19:31:46.457 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.01s
Dec 12 19:31:46.457 INFO [stderr]      Running /target/debug/deps/soo-ddad116963d5a510
Dec 12 19:31:46.460 INFO [stdout] 
Dec 12 19:31:46.460 INFO [stdout] running 0 tests
Dec 12 19:31:46.460 INFO [stdout] 
Dec 12 19:31:46.460 INFO [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
Dec 12 19:31:46.460 INFO [stdout] 
Dec 12 19:31:46.462 INFO [stderr] su: No module specific data is present
Dec 12 19:31:46.873 INFO running `"docker" "inspect" "3875ee7037c1e5f7e12a878b7e2353510e57a85c9d7afe28b9ad58ec786d8035"`
Dec 12 19:31:46.980 INFO running `"docker" "rm" "-f" "3875ee7037c1e5f7e12a878b7e2353510e57a85c9d7afe28b9ad58ec786d8035"`
Dec 12 19:31:47.061 INFO [stdout] 3875ee7037c1e5f7e12a878b7e2353510e57a85c9d7afe28b9ad58ec786d8035