Dec 04 23:59:19.025 INFO testing zhenhuanlee/rust_learn against master#906deae0790bd18681b937fe9a141a3c26cf1855 for pr-56514
Dec 04 23:59:19.025 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-56514/worker-5/master#906deae0790bd18681b937fe9a141a3c26cf1855:/target:rw,Z" "-v" "/mnt/big/crater/work/local/test-source/worker-5/pr-56514/master#906deae0790bd18681b937fe9a141a3c26cf1855:/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 +906deae0790bd18681b937fe9a141a3c26cf1855-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 04 23:59:19.494 INFO [stdout] c23b231e4453385fae58a5b3ff2bf6917d8ffc4d8440a4eff59190ebbc3fe5ea
Dec 04 23:59:19.504 INFO running `"docker" "start" "-a" "c23b231e4453385fae58a5b3ff2bf6917d8ffc4d8440a4eff59190ebbc3fe5ea"`
Dec 04 23:59:19.889 INFO [stderr] usermod: no changes
Dec 04 23:59:19.916 INFO [stderr]    Compiling soo v0.1.0 (/source)
Dec 04 23:59:20.044 INFO [stderr] warning: unused variable: `s3`
Dec 04 23:59:20.044 INFO [stderr]   --> src/main.rs:39:9
Dec 04 23:59:20.044 INFO [stderr]    |
Dec 04 23:59:20.044 INFO [stderr] 39 |     let s3 = s1.clone(); // 拷贝
Dec 04 23:59:20.044 INFO [stderr]    |         ^^ help: consider using `_s3` instead
Dec 04 23:59:20.044 INFO [stderr]    |
Dec 04 23:59:20.044 INFO [stderr]    = note: #[warn(unused_variables)] on by default
Dec 04 23:59:20.044 INFO [stderr] 
Dec 04 23:59:20.044 INFO [stderr] warning: unused variable: `s2`
Dec 04 23:59:20.044 INFO [stderr]   --> src/main.rs:40:9
Dec 04 23:59:20.044 INFO [stderr]    |
Dec 04 23:59:20.044 INFO [stderr] 40 |     let s2 = s1;  // 指针传递，s1 被移除
Dec 04 23:59:20.044 INFO [stderr]    |         ^^ help: consider using `_s2` instead
Dec 04 23:59:20.044 INFO [stderr] 
Dec 04 23:59:20.044 INFO [stderr] warning: unused variable: `s5`
Dec 04 23:59:20.044 INFO [stderr]   --> src/main.rs:45:9
Dec 04 23:59:20.044 INFO [stderr]    |
Dec 04 23:59:20.044 INFO [stderr] 45 |     let s5 = s4;  // 合法，因为是值传递  
Dec 04 23:59:20.044 INFO [stderr]    |         ^^ help: consider using `_s5` instead
Dec 04 23:59:20.044 INFO [stderr] 
Dec 04 23:59:20.044 INFO [stderr] warning: unused variable: `r1`
Dec 04 23:59:20.044 INFO [stderr]   --> src/main.rs:99:9
Dec 04 23:59:20.044 INFO [stderr]    |
Dec 04 23:59:20.044 INFO [stderr] 99 |     let r1 = &mut s;
Dec 04 23:59:20.044 INFO [stderr]    |         ^^ help: consider using `_r1` instead
Dec 04 23:59:20.044 INFO [stderr] 
Dec 04 23:59:20.044 INFO [stderr] warning: unused variable: `r3`
Dec 04 23:59:20.044 INFO [stderr]    --> src/main.rs:103:13
Dec 04 23:59:20.044 INFO [stderr]     |
Dec 04 23:59:20.044 INFO [stderr] 103 |         let r3 = &s2;
Dec 04 23:59:20.044 INFO [stderr]     |             ^^ help: consider using `_r3` instead
Dec 04 23:59:20.044 INFO [stderr] 
Dec 04 23:59:20.044 INFO [stderr] warning: unused variable: `r4`
Dec 04 23:59:20.044 INFO [stderr]    --> src/main.rs:105:9
Dec 04 23:59:20.044 INFO [stderr]     |
Dec 04 23:59:20.044 INFO [stderr] 105 |     let r4 = &mut &s2;
Dec 04 23:59:20.044 INFO [stderr]     |         ^^ help: consider using `_r4` instead
Dec 04 23:59:20.044 INFO [stderr] 
Dec 04 23:59:20.050 INFO [stderr] warning: variable does not need to be mutable
Dec 04 23:59:20.050 INFO [stderr]   --> src/main.rs:97:9
Dec 04 23:59:20.050 INFO [stderr]    |
Dec 04 23:59:20.050 INFO [stderr] 97 |     let mut s2 = String::from("world");
Dec 04 23:59:20.050 INFO [stderr]    |         ----^^
Dec 04 23:59:20.050 INFO [stderr]    |         |
Dec 04 23:59:20.050 INFO [stderr]    |         help: remove this `mut`
Dec 04 23:59:20.050 INFO [stderr]    |
Dec 04 23:59:20.050 INFO [stderr]    = note: #[warn(unused_mut)] on by default
Dec 04 23:59:20.050 INFO [stderr] 
Dec 04 23:59:20.054 INFO [stderr] warning: variable does not need to be mutable
Dec 04 23:59:20.054 INFO [stderr]    --> src/main.rs:120:9
Dec 04 23:59:20.054 INFO [stderr]     |
Dec 04 23:59:20.054 INFO [stderr] 120 |     let mut s = String::from("hello world");
Dec 04 23:59:20.054 INFO [stderr]     |         ----^
Dec 04 23:59:20.054 INFO [stderr]     |         |
Dec 04 23:59:20.054 INFO [stderr]     |         help: remove this `mut`
Dec 04 23:59:20.054 INFO [stderr] 
Dec 04 23:59:20.063 INFO [stderr] warning: function is never used: `test1`
Dec 04 23:59:20.063 INFO [stderr]   --> src/main.rs:30:1
Dec 04 23:59:20.063 INFO [stderr]    |
Dec 04 23:59:20.063 INFO [stderr] 30 | fn test1 () {
Dec 04 23:59:20.063 INFO [stderr]    | ^^^^^^^^^^^
Dec 04 23:59:20.063 INFO [stderr]    |
Dec 04 23:59:20.063 INFO [stderr]    = note: #[warn(dead_code)] on by default
Dec 04 23:59:20.063 INFO [stderr] 
Dec 04 23:59:20.063 INFO [stderr] warning: function is never used: `test2`
Dec 04 23:59:20.063 INFO [stderr]   --> src/main.rs:37:1
Dec 04 23:59:20.063 INFO [stderr]    |
Dec 04 23:59:20.063 INFO [stderr] 37 | fn test2() {
Dec 04 23:59:20.063 INFO [stderr]    | ^^^^^^^^^^
Dec 04 23:59:20.063 INFO [stderr] 
Dec 04 23:59:20.063 INFO [stderr] warning: function is never used: `test3`
Dec 04 23:59:20.063 INFO [stderr]   --> src/main.rs:55:1
Dec 04 23:59:20.063 INFO [stderr]    |
Dec 04 23:59:20.063 INFO [stderr] 55 | fn test3() {
Dec 04 23:59:20.063 INFO [stderr]    | ^^^^^^^^^^
Dec 04 23:59:20.063 INFO [stderr] 
Dec 04 23:59:20.063 INFO [stderr] warning: function is never used: `test3_1`
Dec 04 23:59:20.063 INFO [stderr]   --> src/main.rs:66:1
Dec 04 23:59:20.063 INFO [stderr]    |
Dec 04 23:59:20.063 INFO [stderr] 66 | fn test3_1(sth: String) {
Dec 04 23:59:20.063 INFO [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^
Dec 04 23:59:20.063 INFO [stderr] 
Dec 04 23:59:20.063 INFO [stderr] warning: function is never used: `test3_2`
Dec 04 23:59:20.063 INFO [stderr]   --> src/main.rs:70:1
Dec 04 23:59:20.063 INFO [stderr]    |
Dec 04 23:59:20.063 INFO [stderr] 70 | fn test3_2(si: i32) {
Dec 04 23:59:20.063 INFO [stderr]    | ^^^^^^^^^^^^^^^^^^^
Dec 04 23:59:20.063 INFO [stderr] 
Dec 04 23:59:20.063 INFO [stderr] warning: function is never used: `test4`
Dec 04 23:59:20.063 INFO [stderr]   --> src/main.rs:75:1
Dec 04 23:59:20.063 INFO [stderr]    |
Dec 04 23:59:20.063 INFO [stderr] 75 | fn test4() {
Dec 04 23:59:20.063 INFO [stderr]    | ^^^^^^^^^^
Dec 04 23:59:20.063 INFO [stderr] 
Dec 04 23:59:20.063 INFO [stderr] warning: function is never used: `test4_1`
Dec 04 23:59:20.063 INFO [stderr]   --> src/main.rs:82:1
Dec 04 23:59:20.063 INFO [stderr]    |
Dec 04 23:59:20.063 INFO [stderr] 82 | fn test4_1(s: &String) -> usize {
Dec 04 23:59:20.063 INFO [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 04 23:59:20.063 INFO [stderr] 
Dec 04 23:59:20.063 INFO [stderr] warning: function is never used: `test5`
Dec 04 23:59:20.063 INFO [stderr]   --> src/main.rs:86:1
Dec 04 23:59:20.063 INFO [stderr]    |
Dec 04 23:59:20.063 INFO [stderr] 86 | fn test5() {
Dec 04 23:59:20.063 INFO [stderr]    | ^^^^^^^^^^
Dec 04 23:59:20.063 INFO [stderr] 
Dec 04 23:59:20.063 INFO [stderr] warning: function is never used: `test5_1`
Dec 04 23:59:20.063 INFO [stderr]   --> src/main.rs:91:1
Dec 04 23:59:20.064 INFO [stderr]    |
Dec 04 23:59:20.064 INFO [stderr] 91 | fn test5_1(s: &mut String) {
Dec 04 23:59:20.064 INFO [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 04 23:59:20.064 INFO [stderr] 
Dec 04 23:59:20.064 INFO [stderr] warning: function is never used: `test6`
Dec 04 23:59:20.064 INFO [stderr]   --> src/main.rs:95:1
Dec 04 23:59:20.064 INFO [stderr]    |
Dec 04 23:59:20.064 INFO [stderr] 95 | fn test6() {
Dec 04 23:59:20.064 INFO [stderr]    | ^^^^^^^^^^
Dec 04 23:59:20.064 INFO [stderr] 
Dec 04 23:59:20.064 INFO [stderr] warning: function is never used: `test7`
Dec 04 23:59:20.064 INFO [stderr]    --> src/main.rs:110:1
Dec 04 23:59:20.064 INFO [stderr]     |
Dec 04 23:59:20.064 INFO [stderr] 110 | fn test7() {
Dec 04 23:59:20.064 INFO [stderr]     | ^^^^^^^^^^
Dec 04 23:59:20.064 INFO [stderr] 
Dec 04 23:59:20.064 INFO [stderr] warning: function is never used: `test8`
Dec 04 23:59:20.064 INFO [stderr]    --> src/main.rs:119:1
Dec 04 23:59:20.064 INFO [stderr]     |
Dec 04 23:59:20.064 INFO [stderr] 119 | fn test8() {
Dec 04 23:59:20.064 INFO [stderr]     | ^^^^^^^^^^
Dec 04 23:59:20.064 INFO [stderr] 
Dec 04 23:59:20.064 INFO [stderr] warning: function is never used: `test9`
Dec 04 23:59:20.064 INFO [stderr]    --> src/main.rs:131:1
Dec 04 23:59:20.064 INFO [stderr]     |
Dec 04 23:59:20.064 INFO [stderr] 131 | fn test9() {
Dec 04 23:59:20.064 INFO [stderr]     | ^^^^^^^^^^
Dec 04 23:59:20.064 INFO [stderr] 
Dec 04 23:59:20.064 INFO [stderr] warning: struct is never constructed: `User`
Dec 04 23:59:20.064 INFO [stderr]    --> src/main.rs:141:1
Dec 04 23:59:20.064 INFO [stderr]     |
Dec 04 23:59:20.064 INFO [stderr] 141 | struct User {
Dec 04 23:59:20.064 INFO [stderr]     | ^^^^^^^^^^^
Dec 04 23:59:20.064 INFO [stderr] 
Dec 04 23:59:20.064 INFO [stderr] warning: function is never used: `test10`
Dec 04 23:59:20.064 INFO [stderr]    --> src/main.rs:147:1
Dec 04 23:59:20.064 INFO [stderr]     |
Dec 04 23:59:20.064 INFO [stderr] 147 | fn test10() {
Dec 04 23:59:20.064 INFO [stderr]     | ^^^^^^^^^^^
Dec 04 23:59:20.064 INFO [stderr] 
Dec 04 23:59:20.064 INFO [stderr] warning: struct is never constructed: `Rectangle`
Dec 04 23:59:20.064 INFO [stderr]    --> src/main.rs:161:1
Dec 04 23:59:20.064 INFO [stderr]     |
Dec 04 23:59:20.064 INFO [stderr] 161 | struct Rectangle {
Dec 04 23:59:20.064 INFO [stderr]     | ^^^^^^^^^^^^^^^^
Dec 04 23:59:20.064 INFO [stderr] 
Dec 04 23:59:20.064 INFO [stderr] warning: method is never used: `area`
Dec 04 23:59:20.064 INFO [stderr]    --> src/main.rs:167:5
Dec 04 23:59:20.064 INFO [stderr]     |
Dec 04 23:59:20.064 INFO [stderr] 167 |     fn area(&mut self) {
Dec 04 23:59:20.064 INFO [stderr]     |     ^^^^^^^^^^^^^^^^^^
Dec 04 23:59:20.064 INFO [stderr] 
Dec 04 23:59:20.064 INFO [stderr] warning: method is never used: `can_hold`
Dec 04 23:59:20.064 INFO [stderr]    --> src/main.rs:172:5
Dec 04 23:59:20.064 INFO [stderr]     |
Dec 04 23:59:20.064 INFO [stderr] 172 |     fn can_hold(&self, other: &Rectangle) {
Dec 04 23:59:20.064 INFO [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 04 23:59:20.064 INFO [stderr] 
Dec 04 23:59:20.064 INFO [stderr] warning: method is never used: `square`
Dec 04 23:59:20.064 INFO [stderr]    --> src/main.rs:176:5
Dec 04 23:59:20.064 INFO [stderr]     |
Dec 04 23:59:20.064 INFO [stderr] 176 |     fn square(size: u32) -> Rectangle {
Dec 04 23:59:20.064 INFO [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 04 23:59:20.064 INFO [stderr] 
Dec 04 23:59:20.064 INFO [stderr] warning: enum is never used: `IpAddrKind`
Dec 04 23:59:20.064 INFO [stderr]    --> src/main.rs:183:1
Dec 04 23:59:20.064 INFO [stderr]     |
Dec 04 23:59:20.064 INFO [stderr] 183 | enum IpAddrKind {
Dec 04 23:59:20.064 INFO [stderr]     | ^^^^^^^^^^^^^^^
Dec 04 23:59:20.064 INFO [stderr] 
Dec 04 23:59:20.064 INFO [stderr] warning: enum is never used: `IpAddrKind2`
Dec 04 23:59:20.064 INFO [stderr]    --> src/main.rs:188:1
Dec 04 23:59:20.064 INFO [stderr]     |
Dec 04 23:59:20.064 INFO [stderr] 188 | enum IpAddrKind2 {
Dec 04 23:59:20.064 INFO [stderr]     | ^^^^^^^^^^^^^^^^
Dec 04 23:59:20.064 INFO [stderr] 
Dec 04 23:59:20.064 INFO [stderr] warning: struct is never constructed: `IpAddr`
Dec 04 23:59:20.064 INFO [stderr]    --> src/main.rs:195:1
Dec 04 23:59:20.064 INFO [stderr]     |
Dec 04 23:59:20.064 INFO [stderr] 195 | struct IpAddr {
Dec 04 23:59:20.064 INFO [stderr]     | ^^^^^^^^^^^^^
Dec 04 23:59:20.064 INFO [stderr] 
Dec 04 23:59:20.064 INFO [stderr] warning: function is never used: `test11`
Dec 04 23:59:20.065 INFO [stderr]    --> src/main.rs:200:1
Dec 04 23:59:20.065 INFO [stderr]     |
Dec 04 23:59:20.065 INFO [stderr] 200 | fn test11() {
Dec 04 23:59:20.065 INFO [stderr]     | ^^^^^^^^^^^
Dec 04 23:59:20.065 INFO [stderr] 
Dec 04 23:59:20.065 INFO [stderr] warning: method is never used: `print_addr`
Dec 04 23:59:20.065 INFO [stderr]    --> src/main.rs:218:5
Dec 04 23:59:20.065 INFO [stderr]     |
Dec 04 23:59:20.065 INFO [stderr] 218 |     fn print_addr(&self) {
Dec 04 23:59:20.065 INFO [stderr]     |     ^^^^^^^^^^^^^^^^^^^^
Dec 04 23:59:20.065 INFO [stderr] 
Dec 04 23:59:20.065 INFO [stderr] warning: variant is never constructed: `Penny`
Dec 04 23:59:20.065 INFO [stderr]    --> src/main.rs:231:5
Dec 04 23:59:20.065 INFO [stderr]     |
Dec 04 23:59:20.065 INFO [stderr] 231 |     Penny,
Dec 04 23:59:20.065 INFO [stderr]     |     ^^^^^
Dec 04 23:59:20.065 INFO [stderr] 
Dec 04 23:59:20.065 INFO [stderr] warning: variant is never constructed: `Nickel`
Dec 04 23:59:20.065 INFO [stderr]    --> src/main.rs:232:5
Dec 04 23:59:20.065 INFO [stderr]     |
Dec 04 23:59:20.065 INFO [stderr] 232 |     Nickel,
Dec 04 23:59:20.065 INFO [stderr]     |     ^^^^^^
Dec 04 23:59:20.065 INFO [stderr] 
Dec 04 23:59:20.065 INFO [stderr] warning: variant is never constructed: `Dime`
Dec 04 23:59:20.065 INFO [stderr]    --> src/main.rs:233:5
Dec 04 23:59:20.065 INFO [stderr]     |
Dec 04 23:59:20.065 INFO [stderr] 233 |     Dime,
Dec 04 23:59:20.065 INFO [stderr]     |     ^^^^
Dec 04 23:59:20.065 INFO [stderr] 
Dec 04 23:59:20.222 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.31s
Dec 04 23:59:20.222 INFO [stderr] su: No module specific data is present
Dec 04 23:59:20.651 INFO running `"docker" "inspect" "c23b231e4453385fae58a5b3ff2bf6917d8ffc4d8440a4eff59190ebbc3fe5ea"`
Dec 04 23:59:20.704 INFO running `"docker" "rm" "-f" "c23b231e4453385fae58a5b3ff2bf6917d8ffc4d8440a4eff59190ebbc3fe5ea"`
Dec 04 23:59:20.764 INFO [stdout] c23b231e4453385fae58a5b3ff2bf6917d8ffc4d8440a4eff59190ebbc3fe5ea
Dec 04 23:59:20.766 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-56514/worker-5/master#906deae0790bd18681b937fe9a141a3c26cf1855:/target:rw,Z" "-v" "/mnt/big/crater/work/local/test-source/worker-5/pr-56514/master#906deae0790bd18681b937fe9a141a3c26cf1855:/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 +906deae0790bd18681b937fe9a141a3c26cf1855-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 04 23:59:21.093 INFO [stdout] f70581dc0b99b6c47e819651cb183016de0d417e51f9463743c2880c5eeaef8c
Dec 04 23:59:21.117 INFO running `"docker" "start" "-a" "f70581dc0b99b6c47e819651cb183016de0d417e51f9463743c2880c5eeaef8c"`
Dec 04 23:59:21.874 INFO [stderr] usermod: no changes
Dec 04 23:59:21.924 INFO [stderr]    Compiling soo v0.1.0 (/source)
Dec 04 23:59:22.092 INFO [stderr] warning: unused variable: `s3`
Dec 04 23:59:22.092 INFO [stderr]   --> src/main.rs:39:9
Dec 04 23:59:22.092 INFO [stderr]    |
Dec 04 23:59:22.092 INFO [stderr] 39 |     let s3 = s1.clone(); // 拷贝
Dec 04 23:59:22.092 INFO [stderr]    |         ^^ help: consider using `_s3` instead
Dec 04 23:59:22.092 INFO [stderr]    |
Dec 04 23:59:22.092 INFO [stderr]    = note: #[warn(unused_variables)] on by default
Dec 04 23:59:22.092 INFO [stderr] 
Dec 04 23:59:22.092 INFO [stderr] warning: unused variable: `s2`
Dec 04 23:59:22.092 INFO [stderr]   --> src/main.rs:40:9
Dec 04 23:59:22.092 INFO [stderr]    |
Dec 04 23:59:22.092 INFO [stderr] 40 |     let s2 = s1;  // 指针传递，s1 被移除
Dec 04 23:59:22.092 INFO [stderr]    |         ^^ help: consider using `_s2` instead
Dec 04 23:59:22.092 INFO [stderr] 
Dec 04 23:59:22.092 INFO [stderr] warning: unused variable: `s5`
Dec 04 23:59:22.092 INFO [stderr]   --> src/main.rs:45:9
Dec 04 23:59:22.092 INFO [stderr]    |
Dec 04 23:59:22.092 INFO [stderr] 45 |     let s5 = s4;  // 合法，因为是值传递  
Dec 04 23:59:22.092 INFO [stderr]    |         ^^ help: consider using `_s5` instead
Dec 04 23:59:22.092 INFO [stderr] 
Dec 04 23:59:22.093 INFO [stderr] warning: unused variable: `r1`
Dec 04 23:59:22.093 INFO [stderr]   --> src/main.rs:99:9
Dec 04 23:59:22.093 INFO [stderr]    |
Dec 04 23:59:22.093 INFO [stderr] 99 |     let r1 = &mut s;
Dec 04 23:59:22.093 INFO [stderr]    |         ^^ help: consider using `_r1` instead
Dec 04 23:59:22.093 INFO [stderr] 
Dec 04 23:59:22.093 INFO [stderr] warning: unused variable: `r3`
Dec 04 23:59:22.093 INFO [stderr]    --> src/main.rs:103:13
Dec 04 23:59:22.093 INFO [stderr]     |
Dec 04 23:59:22.093 INFO [stderr] 103 |         let r3 = &s2;
Dec 04 23:59:22.093 INFO [stderr]     |             ^^ help: consider using `_r3` instead
Dec 04 23:59:22.093 INFO [stderr] 
Dec 04 23:59:22.093 INFO [stderr] warning: unused variable: `r4`
Dec 04 23:59:22.093 INFO [stderr]    --> src/main.rs:105:9
Dec 04 23:59:22.093 INFO [stderr]     |
Dec 04 23:59:22.093 INFO [stderr] 105 |     let r4 = &mut &s2;
Dec 04 23:59:22.093 INFO [stderr]     |         ^^ help: consider using `_r4` instead
Dec 04 23:59:22.093 INFO [stderr] 
Dec 04 23:59:22.096 INFO [stderr] warning: variable does not need to be mutable
Dec 04 23:59:22.096 INFO [stderr]   --> src/main.rs:97:9
Dec 04 23:59:22.096 INFO [stderr]    |
Dec 04 23:59:22.096 INFO [stderr] 97 |     let mut s2 = String::from("world");
Dec 04 23:59:22.096 INFO [stderr]    |         ----^^
Dec 04 23:59:22.096 INFO [stderr]    |         |
Dec 04 23:59:22.096 INFO [stderr]    |         help: remove this `mut`
Dec 04 23:59:22.096 INFO [stderr]    |
Dec 04 23:59:22.096 INFO [stderr]    = note: #[warn(unused_mut)] on by default
Dec 04 23:59:22.096 INFO [stderr] 
Dec 04 23:59:22.104 INFO [stderr] warning: variable does not need to be mutable
Dec 04 23:59:22.104 INFO [stderr]    --> src/main.rs:120:9
Dec 04 23:59:22.104 INFO [stderr]     |
Dec 04 23:59:22.104 INFO [stderr] 120 |     let mut s = String::from("hello world");
Dec 04 23:59:22.104 INFO [stderr]     |         ----^
Dec 04 23:59:22.104 INFO [stderr]     |         |
Dec 04 23:59:22.104 INFO [stderr]     |         help: remove this `mut`
Dec 04 23:59:22.104 INFO [stderr] 
Dec 04 23:59:22.117 INFO [stderr] warning: function is never used: `test1`
Dec 04 23:59:22.117 INFO [stderr]   --> src/main.rs:30:1
Dec 04 23:59:22.117 INFO [stderr]    |
Dec 04 23:59:22.117 INFO [stderr] 30 | fn test1 () {
Dec 04 23:59:22.117 INFO [stderr]    | ^^^^^^^^^^^
Dec 04 23:59:22.117 INFO [stderr]    |
Dec 04 23:59:22.117 INFO [stderr]    = note: #[warn(dead_code)] on by default
Dec 04 23:59:22.117 INFO [stderr] 
Dec 04 23:59:22.117 INFO [stderr] warning: function is never used: `test2`
Dec 04 23:59:22.117 INFO [stderr]   --> src/main.rs:37:1
Dec 04 23:59:22.117 INFO [stderr]    |
Dec 04 23:59:22.117 INFO [stderr] 37 | fn test2() {
Dec 04 23:59:22.117 INFO [stderr]    | ^^^^^^^^^^
Dec 04 23:59:22.117 INFO [stderr] 
Dec 04 23:59:22.117 INFO [stderr] warning: function is never used: `test3`
Dec 04 23:59:22.117 INFO [stderr]   --> src/main.rs:55:1
Dec 04 23:59:22.117 INFO [stderr]    |
Dec 04 23:59:22.117 INFO [stderr] 55 | fn test3() {
Dec 04 23:59:22.117 INFO [stderr]    | ^^^^^^^^^^
Dec 04 23:59:22.117 INFO [stderr] 
Dec 04 23:59:22.117 INFO [stderr] warning: function is never used: `test3_1`
Dec 04 23:59:22.117 INFO [stderr]   --> src/main.rs:66:1
Dec 04 23:59:22.117 INFO [stderr]    |
Dec 04 23:59:22.117 INFO [stderr] 66 | fn test3_1(sth: String) {
Dec 04 23:59:22.117 INFO [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^
Dec 04 23:59:22.117 INFO [stderr] 
Dec 04 23:59:22.117 INFO [stderr] warning: function is never used: `test3_2`
Dec 04 23:59:22.117 INFO [stderr]   --> src/main.rs:70:1
Dec 04 23:59:22.117 INFO [stderr]    |
Dec 04 23:59:22.117 INFO [stderr] 70 | fn test3_2(si: i32) {
Dec 04 23:59:22.117 INFO [stderr]    | ^^^^^^^^^^^^^^^^^^^
Dec 04 23:59:22.117 INFO [stderr] 
Dec 04 23:59:22.117 INFO [stderr] warning: function is never used: `test4`
Dec 04 23:59:22.117 INFO [stderr]   --> src/main.rs:75:1
Dec 04 23:59:22.117 INFO [stderr]    |
Dec 04 23:59:22.117 INFO [stderr] 75 | fn test4() {
Dec 04 23:59:22.117 INFO [stderr]    | ^^^^^^^^^^
Dec 04 23:59:22.117 INFO [stderr] 
Dec 04 23:59:22.117 INFO [stderr] warning: function is never used: `test4_1`
Dec 04 23:59:22.117 INFO [stderr]   --> src/main.rs:82:1
Dec 04 23:59:22.117 INFO [stderr]    |
Dec 04 23:59:22.117 INFO [stderr] 82 | fn test4_1(s: &String) -> usize {
Dec 04 23:59:22.117 INFO [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 04 23:59:22.117 INFO [stderr] 
Dec 04 23:59:22.117 INFO [stderr] warning: function is never used: `test5`
Dec 04 23:59:22.117 INFO [stderr]   --> src/main.rs:86:1
Dec 04 23:59:22.117 INFO [stderr]    |
Dec 04 23:59:22.117 INFO [stderr] 86 | fn test5() {
Dec 04 23:59:22.117 INFO [stderr]    | ^^^^^^^^^^
Dec 04 23:59:22.117 INFO [stderr] 
Dec 04 23:59:22.117 INFO [stderr] warning: function is never used: `test5_1`
Dec 04 23:59:22.117 INFO [stderr]   --> src/main.rs:91:1
Dec 04 23:59:22.117 INFO [stderr]    |
Dec 04 23:59:22.117 INFO [stderr] 91 | fn test5_1(s: &mut String) {
Dec 04 23:59:22.117 INFO [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 04 23:59:22.117 INFO [stderr] 
Dec 04 23:59:22.117 INFO [stderr] warning: function is never used: `test6`
Dec 04 23:59:22.117 INFO [stderr]   --> src/main.rs:95:1
Dec 04 23:59:22.117 INFO [stderr]    |
Dec 04 23:59:22.117 INFO [stderr] 95 | fn test6() {
Dec 04 23:59:22.117 INFO [stderr]    | ^^^^^^^^^^
Dec 04 23:59:22.117 INFO [stderr] 
Dec 04 23:59:22.117 INFO [stderr] warning: function is never used: `test7`
Dec 04 23:59:22.117 INFO [stderr]    --> src/main.rs:110:1
Dec 04 23:59:22.117 INFO [stderr]     |
Dec 04 23:59:22.117 INFO [stderr] 110 | fn test7() {
Dec 04 23:59:22.117 INFO [stderr]     | ^^^^^^^^^^
Dec 04 23:59:22.117 INFO [stderr] 
Dec 04 23:59:22.117 INFO [stderr] warning: function is never used: `test8`
Dec 04 23:59:22.117 INFO [stderr]    --> src/main.rs:119:1
Dec 04 23:59:22.118 INFO [stderr]     |
Dec 04 23:59:22.118 INFO [stderr] 119 | fn test8() {
Dec 04 23:59:22.118 INFO [stderr]     | ^^^^^^^^^^
Dec 04 23:59:22.118 INFO [stderr] 
Dec 04 23:59:22.118 INFO [stderr] warning: function is never used: `test9`
Dec 04 23:59:22.118 INFO [stderr]    --> src/main.rs:131:1
Dec 04 23:59:22.118 INFO [stderr]     |
Dec 04 23:59:22.118 INFO [stderr] 131 | fn test9() {
Dec 04 23:59:22.118 INFO [stderr]     | ^^^^^^^^^^
Dec 04 23:59:22.118 INFO [stderr] 
Dec 04 23:59:22.118 INFO [stderr] warning: struct is never constructed: `User`
Dec 04 23:59:22.118 INFO [stderr]    --> src/main.rs:141:1
Dec 04 23:59:22.118 INFO [stderr]     |
Dec 04 23:59:22.118 INFO [stderr] 141 | struct User {
Dec 04 23:59:22.118 INFO [stderr]     | ^^^^^^^^^^^
Dec 04 23:59:22.118 INFO [stderr] 
Dec 04 23:59:22.118 INFO [stderr] warning: function is never used: `test10`
Dec 04 23:59:22.118 INFO [stderr]    --> src/main.rs:147:1
Dec 04 23:59:22.118 INFO [stderr]     |
Dec 04 23:59:22.118 INFO [stderr] 147 | fn test10() {
Dec 04 23:59:22.118 INFO [stderr]     | ^^^^^^^^^^^
Dec 04 23:59:22.118 INFO [stderr] 
Dec 04 23:59:22.118 INFO [stderr] warning: struct is never constructed: `Rectangle`
Dec 04 23:59:22.118 INFO [stderr]    --> src/main.rs:161:1
Dec 04 23:59:22.118 INFO [stderr]     |
Dec 04 23:59:22.118 INFO [stderr] 161 | struct Rectangle {
Dec 04 23:59:22.118 INFO [stderr]     | ^^^^^^^^^^^^^^^^
Dec 04 23:59:22.118 INFO [stderr] 
Dec 04 23:59:22.118 INFO [stderr] warning: method is never used: `area`
Dec 04 23:59:22.118 INFO [stderr]    --> src/main.rs:167:5
Dec 04 23:59:22.118 INFO [stderr]     |
Dec 04 23:59:22.118 INFO [stderr] 167 |     fn area(&mut self) {
Dec 04 23:59:22.118 INFO [stderr]     |     ^^^^^^^^^^^^^^^^^^
Dec 04 23:59:22.118 INFO [stderr] 
Dec 04 23:59:22.118 INFO [stderr] warning: method is never used: `can_hold`
Dec 04 23:59:22.118 INFO [stderr]    --> src/main.rs:172:5
Dec 04 23:59:22.118 INFO [stderr]     |
Dec 04 23:59:22.118 INFO [stderr] 172 |     fn can_hold(&self, other: &Rectangle) {
Dec 04 23:59:22.118 INFO [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 04 23:59:22.118 INFO [stderr] 
Dec 04 23:59:22.118 INFO [stderr] warning: method is never used: `square`
Dec 04 23:59:22.118 INFO [stderr]    --> src/main.rs:176:5
Dec 04 23:59:22.118 INFO [stderr]     |
Dec 04 23:59:22.118 INFO [stderr] 176 |     fn square(size: u32) -> Rectangle {
Dec 04 23:59:22.118 INFO [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 04 23:59:22.118 INFO [stderr] 
Dec 04 23:59:22.118 INFO [stderr] warning: enum is never used: `IpAddrKind`
Dec 04 23:59:22.118 INFO [stderr]    --> src/main.rs:183:1
Dec 04 23:59:22.118 INFO [stderr]     |
Dec 04 23:59:22.118 INFO [stderr] 183 | enum IpAddrKind {
Dec 04 23:59:22.118 INFO [stderr]     | ^^^^^^^^^^^^^^^
Dec 04 23:59:22.118 INFO [stderr] 
Dec 04 23:59:22.118 INFO [stderr] warning: enum is never used: `IpAddrKind2`
Dec 04 23:59:22.118 INFO [stderr]    --> src/main.rs:188:1
Dec 04 23:59:22.118 INFO [stderr]     |
Dec 04 23:59:22.118 INFO [stderr] 188 | enum IpAddrKind2 {
Dec 04 23:59:22.118 INFO [stderr]     | ^^^^^^^^^^^^^^^^
Dec 04 23:59:22.118 INFO [stderr] 
Dec 04 23:59:22.118 INFO [stderr] warning: struct is never constructed: `IpAddr`
Dec 04 23:59:22.118 INFO [stderr]    --> src/main.rs:195:1
Dec 04 23:59:22.118 INFO [stderr]     |
Dec 04 23:59:22.118 INFO [stderr] 195 | struct IpAddr {
Dec 04 23:59:22.118 INFO [stderr]     | ^^^^^^^^^^^^^
Dec 04 23:59:22.118 INFO [stderr] 
Dec 04 23:59:22.118 INFO [stderr] warning: function is never used: `test11`
Dec 04 23:59:22.118 INFO [stderr]    --> src/main.rs:200:1
Dec 04 23:59:22.118 INFO [stderr]     |
Dec 04 23:59:22.118 INFO [stderr] 200 | fn test11() {
Dec 04 23:59:22.118 INFO [stderr]     | ^^^^^^^^^^^
Dec 04 23:59:22.118 INFO [stderr] 
Dec 04 23:59:22.118 INFO [stderr] warning: method is never used: `print_addr`
Dec 04 23:59:22.118 INFO [stderr]    --> src/main.rs:218:5
Dec 04 23:59:22.118 INFO [stderr]     |
Dec 04 23:59:22.118 INFO [stderr] 218 |     fn print_addr(&self) {
Dec 04 23:59:22.118 INFO [stderr]     |     ^^^^^^^^^^^^^^^^^^^^
Dec 04 23:59:22.118 INFO [stderr] 
Dec 04 23:59:22.118 INFO [stderr] warning: variant is never constructed: `Penny`
Dec 04 23:59:22.118 INFO [stderr]    --> src/main.rs:231:5
Dec 04 23:59:22.118 INFO [stderr]     |
Dec 04 23:59:22.118 INFO [stderr] 231 |     Penny,
Dec 04 23:59:22.118 INFO [stderr]     |     ^^^^^
Dec 04 23:59:22.118 INFO [stderr] 
Dec 04 23:59:22.118 INFO [stderr] warning: variant is never constructed: `Nickel`
Dec 04 23:59:22.119 INFO [stderr]    --> src/main.rs:232:5
Dec 04 23:59:22.119 INFO [stderr]     |
Dec 04 23:59:22.119 INFO [stderr] 232 |     Nickel,
Dec 04 23:59:22.119 INFO [stderr]     |     ^^^^^^
Dec 04 23:59:22.119 INFO [stderr] 
Dec 04 23:59:22.119 INFO [stderr] warning: variant is never constructed: `Dime`
Dec 04 23:59:22.119 INFO [stderr]    --> src/main.rs:233:5
Dec 04 23:59:22.119 INFO [stderr]     |
Dec 04 23:59:22.119 INFO [stderr] 233 |     Dime,
Dec 04 23:59:22.119 INFO [stderr]     |     ^^^^
Dec 04 23:59:22.119 INFO [stderr] 
Dec 04 23:59:22.402 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.50s
Dec 04 23:59:22.405 INFO [stderr] su: No module specific data is present
Dec 04 23:59:23.135 INFO running `"docker" "inspect" "f70581dc0b99b6c47e819651cb183016de0d417e51f9463743c2880c5eeaef8c"`
Dec 04 23:59:23.364 INFO running `"docker" "rm" "-f" "f70581dc0b99b6c47e819651cb183016de0d417e51f9463743c2880c5eeaef8c"`
Dec 04 23:59:23.571 INFO [stdout] f70581dc0b99b6c47e819651cb183016de0d417e51f9463743c2880c5eeaef8c
Dec 04 23:59:23.580 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-56514/worker-5/master#906deae0790bd18681b937fe9a141a3c26cf1855:/target:rw,Z" "-v" "/mnt/big/crater/work/local/test-source/worker-5/pr-56514/master#906deae0790bd18681b937fe9a141a3c26cf1855:/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 +906deae0790bd18681b937fe9a141a3c26cf1855-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 04 23:59:24.139 INFO [stdout] 2e46f55a5c159ba3106928ae8fdb9a860709eb9ace9fcba6389428a5f31f4433
Dec 04 23:59:24.140 INFO running `"docker" "start" "-a" "2e46f55a5c159ba3106928ae8fdb9a860709eb9ace9fcba6389428a5f31f4433"`
Dec 04 23:59:24.712 INFO [stderr] usermod: no changes
Dec 04 23:59:24.734 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.00s
Dec 04 23:59:24.734 INFO [stderr]      Running /target/debug/deps/soo-f38ed7cd373d8298
Dec 04 23:59:24.737 INFO [stdout] 
Dec 04 23:59:24.738 INFO [stdout] running 0 tests
Dec 04 23:59:24.738 INFO [stdout] 
Dec 04 23:59:24.738 INFO [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
Dec 04 23:59:24.738 INFO [stdout] 
Dec 04 23:59:24.739 INFO [stderr] su: No module specific data is present
Dec 04 23:59:25.025 INFO running `"docker" "inspect" "2e46f55a5c159ba3106928ae8fdb9a860709eb9ace9fcba6389428a5f31f4433"`
Dec 04 23:59:25.083 INFO running `"docker" "rm" "-f" "2e46f55a5c159ba3106928ae8fdb9a860709eb9ace9fcba6389428a5f31f4433"`
Dec 04 23:59:25.170 INFO [stdout] 2e46f55a5c159ba3106928ae8fdb9a860709eb9ace9fcba6389428a5f31f4433