Sep 01 11:35:58.120 INFO checking yuya373/trpl against master#1114ab684fbad001c4e580326d8eb4d8c4e917d3 for pr-53851
Sep 01 11:35:58.120 INFO running: cargo +1114ab684fbad001c4e580326d8eb4d8c4e917d3-alt check --frozen --all --all-targets
Sep 01 11:35:58.120 INFO running `"docker" "create" "-v" "/home/ec2-user/crater/./work/local/test-source/worker-0/pr-53851/master#1114ab684fbad001c4e580326d8eb4d8c4e917d3:/source:ro,Z" "-v" "/home/ec2-user/crater/./work/local/target-dirs/pr-53851/worker-0/master#1114ab684fbad001c4e580326d8eb4d8c4e917d3:/target:rw,Z" "-v" "/home/ec2-user/crater/./work/local/cargo-home:/cargo-home:ro,Z" "-v" "/home/ec2-user/crater/./work/local/rustup-home:/rustup-home:ro,Z" "-e" "USER_ID=500" "-e" "CMD=cargo +1114ab684fbad001c4e580326d8eb4d8c4e917d3-alt check --frozen --all --all-targets" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-m" "2G" "crater"`
Sep 01 11:35:58.326 INFO blam! 5d94117f1189af176bca9b850bc513e51cbef7b970c7030f2727675c265567f7
Sep 01 11:35:58.328 INFO running `"docker" "start" "-a" "5d94117f1189af176bca9b850bc513e51cbef7b970c7030f2727675c265567f7"`
Sep 01 11:35:59.146 INFO kablam!     Checking chapter7 v0.1.0 (file:///source/chapter7)
Sep 01 11:35:59.146 INFO kablam!     Checking chapter6 v0.1.0 (file:///source/chapter6)
Sep 01 11:35:59.146 INFO kablam!     Checking chapter10 v0.1.0 (file:///source/chapter10)
Sep 01 11:35:59.146 INFO kablam!     Checking chapter4 v0.1.0 (file:///source/chapter4)
Sep 01 11:35:59.146 INFO kablam!     Checking chapter9 v0.1.0 (file:///source/chapter9)
Sep 01 11:35:59.157 INFO kablam!     Checking chapter8 v0.1.0 (file:///source/chapter8)
Sep 01 11:35:59.419 INFO kablam! warning: field is never used: `part`
Sep 01 11:35:59.419 INFO kablam!  --> chapter10/src/main.rs:5:5
Sep 01 11:35:59.419 INFO kablam!   |
Sep 01 11:35:59.419 INFO kablam! 5 |     part: &'a str,
Sep 01 11:35:59.419 INFO kablam!   |     ^^^^^^^^^^^^^
Sep 01 11:35:59.419 INFO kablam!   |
Sep 01 11:35:59.419 INFO kablam!   = note: #[warn(dead_code)] on by default
Sep 01 11:35:59.419 INFO kablam! 
Sep 01 11:35:59.420 INFO kablam! warning: method is never used: `announce_and_return_part`
Sep 01 11:35:59.420 INFO kablam!   --> chapter10/src/main.rs:15:5
Sep 01 11:35:59.420 INFO kablam!    |
Sep 01 11:35:59.420 INFO kablam! 15 |     fn announce_and_return_part(&self, announcement: &str) -> &str {
Sep 01 11:35:59.420 INFO kablam!    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Sep 01 11:35:59.420 INFO kablam! 
Sep 01 11:35:59.707 INFO kablam! warning: unused variable: `some_u8_value`
Sep 01 11:35:59.707 INFO kablam!   --> chapter6/src/main.rs:29:9
Sep 01 11:35:59.707 INFO kablam!    |
Sep 01 11:35:59.707 INFO kablam! 29 |     let some_u8_value = Some(0u8);
Sep 01 11:35:59.707 INFO kablam!    |         ^^^^^^^^^^^^^ help: consider using `_some_u8_value` instead
Sep 01 11:35:59.708 INFO kablam!    |
Sep 01 11:35:59.708 INFO kablam!    = note: #[warn(unused_variables)] on by default
Sep 01 11:35:59.708 INFO kablam! 
Sep 01 11:35:59.737 INFO kablam! warning: variant is never constructed: `ChangeColor`
Sep 01 11:35:59.737 INFO kablam!   --> chapter6/src/main.rs:49:5
Sep 01 11:35:59.737 INFO kablam!    |
Sep 01 11:35:59.737 INFO kablam! 49 |     ChangeColor(i32, i32, i32),
Sep 01 11:35:59.737 INFO kablam!    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^
Sep 01 11:35:59.738 INFO kablam!    |
Sep 01 11:35:59.738 INFO kablam!    = note: #[warn(dead_code)] on by default
Sep 01 11:35:59.738 INFO kablam! 
Sep 01 11:35:59.740 INFO kablam! warning: variant is never constructed: `Alabama`
Sep 01 11:35:59.740 INFO kablam!   --> chapter6/src/main.rs:59:5
Sep 01 11:35:59.740 INFO kablam!    |
Sep 01 11:35:59.740 INFO kablam! 59 |     Alabama,
Sep 01 11:35:59.740 INFO kablam!    |     ^^^^^^^
Sep 01 11:35:59.740 INFO kablam! 
Sep 01 11:35:59.741 INFO kablam! warning: variant is never constructed: `Nickel`
Sep 01 11:35:59.741 INFO kablam!   --> chapter6/src/main.rs:65:5
Sep 01 11:35:59.741 INFO kablam!    |
Sep 01 11:35:59.741 INFO kablam! 65 |     Nickel,
Sep 01 11:35:59.741 INFO kablam!    |     ^^^^^^
Sep 01 11:35:59.741 INFO kablam! 
Sep 01 11:35:59.742 INFO kablam! warning: variant is never constructed: `Dime`
Sep 01 11:35:59.742 INFO kablam!   --> chapter6/src/main.rs:66:5
Sep 01 11:35:59.742 INFO kablam!    |
Sep 01 11:35:59.742 INFO kablam! 66 |     Dime,
Sep 01 11:35:59.742 INFO kablam!    |     ^^^^
Sep 01 11:35:59.742 INFO kablam! 
Sep 01 11:35:59.813 INFO kablam!     Checking chapter5 v0.1.0 (file:///source/chapter5)
Sep 01 11:35:59.816 INFO kablam! warning: field is never used: `part`
Sep 01 11:35:59.816 INFO kablam!  --> chapter10/src/main.rs:5:5
Sep 01 11:35:59.816 INFO kablam!   |
Sep 01 11:35:59.816 INFO kablam! 5 |     part: &'a str,
Sep 01 11:35:59.816 INFO kablam!   |     ^^^^^^^^^^^^^
Sep 01 11:35:59.817 INFO kablam!   |
Sep 01 11:35:59.817 INFO kablam!   = note: #[warn(dead_code)] on by default
Sep 01 11:35:59.817 INFO kablam! 
Sep 01 11:35:59.818 INFO kablam! warning: method is never used: `announce_and_return_part`
Sep 01 11:35:59.818 INFO kablam!   --> chapter10/src/main.rs:15:5
Sep 01 11:35:59.818 INFO kablam!    |
Sep 01 11:35:59.818 INFO kablam! 15 |     fn announce_and_return_part(&self, announcement: &str) -> &str {
Sep 01 11:35:59.818 INFO kablam!    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Sep 01 11:35:59.818 INFO kablam! 
Sep 01 11:36:00.206 INFO kablam! warning: variable does not need to be mutable
Sep 01 11:36:00.206 INFO kablam!   --> chapter8/src/main.rs:26:9
Sep 01 11:36:00.206 INFO kablam!    |
Sep 01 11:36:00.206 INFO kablam! 26 |     let mut v = vec![1, 2, 3, 4, 5];
Sep 01 11:36:00.206 INFO kablam!    |         ----^
Sep 01 11:36:00.206 INFO kablam!    |         |
Sep 01 11:36:00.206 INFO kablam!    |         help: remove this `mut`
Sep 01 11:36:00.206 INFO kablam!    |
Sep 01 11:36:00.206 INFO kablam!    = note: #[warn(unused_mut)] on by default
Sep 01 11:36:00.206 INFO kablam! 
Sep 01 11:36:00.207 INFO kablam! warning: unused variable: `s1`
Sep 01 11:36:00.207 INFO kablam!   --> chapter4/src/main.rs:75:9
Sep 01 11:36:00.207 INFO kablam!    |
Sep 01 11:36:00.207 INFO kablam! 75 |     let s1 = &mut s;
Sep 01 11:36:00.207 INFO kablam!    |         ^^ help: consider using `_s1` instead
Sep 01 11:36:00.207 INFO kablam!    |
Sep 01 11:36:00.207 INFO kablam!    = note: #[warn(unused_variables)] on by default
Sep 01 11:36:00.207 INFO kablam! 
Sep 01 11:36:00.208 INFO kablam! warning: unused variable: `r1`
Sep 01 11:36:00.208 INFO kablam!   --> chapter4/src/main.rs:86:13
Sep 01 11:36:00.208 INFO kablam!    |
Sep 01 11:36:00.208 INFO kablam! 86 |         let r1 = &mut s;
Sep 01 11:36:00.208 INFO kablam!    |             ^^ help: consider using `_r1` instead
Sep 01 11:36:00.208 INFO kablam! 
Sep 01 11:36:00.208 INFO kablam! warning: unused variable: `r2`
Sep 01 11:36:00.208 INFO kablam!   --> chapter4/src/main.rs:88:9
Sep 01 11:36:00.208 INFO kablam!    |
Sep 01 11:36:00.208 INFO kablam! 88 |     let r2 = &mut s;
Sep 01 11:36:00.208 INFO kablam!    |         ^^ help: consider using `_r2` instead
Sep 01 11:36:00.208 INFO kablam! 
Sep 01 11:36:00.208 INFO kablam! warning: unused variable: `r1`
Sep 01 11:36:00.208 INFO kablam!   --> chapter4/src/main.rs:92:9
Sep 01 11:36:00.208 INFO kablam!    |
Sep 01 11:36:00.208 INFO kablam! 92 |     let r1 = &s;
Sep 01 11:36:00.208 INFO kablam!    |         ^^ help: consider using `_r1` instead
Sep 01 11:36:00.208 INFO kablam! 
Sep 01 11:36:00.208 INFO kablam! warning: unused variable: `r2`
Sep 01 11:36:00.208 INFO kablam!   --> chapter4/src/main.rs:94:9
Sep 01 11:36:00.208 INFO kablam!    |
Sep 01 11:36:00.208 INFO kablam! 94 |     let r2 = &s;
Sep 01 11:36:00.208 INFO kablam!    |         ^^ help: consider using `_r2` instead
Sep 01 11:36:00.209 INFO kablam! 
Sep 01 11:36:00.313 INFO kablam! warning: variable does not need to be mutable
Sep 01 11:36:00.313 INFO kablam!   --> chapter4/src/main.rs:90:9
Sep 01 11:36:00.313 INFO kablam!    |
Sep 01 11:36:00.314 INFO kablam! 90 |     let mut s = String::from("hello");
Sep 01 11:36:00.314 INFO kablam!    |         ----^
Sep 01 11:36:00.314 INFO kablam!    |         |
Sep 01 11:36:00.314 INFO kablam!    |         help: remove this `mut`
Sep 01 11:36:00.314 INFO kablam!    |
Sep 01 11:36:00.314 INFO kablam!    = note: #[warn(unused_mut)] on by default
Sep 01 11:36:00.314 INFO kablam! 
Sep 01 11:36:00.314 INFO kablam! warning: variable does not need to be mutable
Sep 01 11:36:00.314 INFO kablam!    --> chapter4/src/main.rs:108:9
Sep 01 11:36:00.314 INFO kablam!     |
Sep 01 11:36:00.314 INFO kablam! 108 |     let mut s = String::from("hello world");
Sep 01 11:36:00.315 INFO kablam!     |         ----^
Sep 01 11:36:00.315 INFO kablam!     |         |
Sep 01 11:36:00.315 INFO kablam!     |         help: remove this `mut`
Sep 01 11:36:00.315 INFO kablam! 
Sep 01 11:36:00.333 INFO kablam! warning: function is never used: `no_dangle`
Sep 01 11:36:00.333 INFO kablam!    --> chapter4/src/main.rs:168:1
Sep 01 11:36:00.333 INFO kablam!     |
Sep 01 11:36:00.333 INFO kablam! 168 | fn no_dangle() -> String {
Sep 01 11:36:00.333 INFO kablam!     | ^^^^^^^^^^^^^^^^^^^^^^^^
Sep 01 11:36:00.333 INFO kablam!     |
Sep 01 11:36:00.333 INFO kablam!     = note: #[warn(dead_code)] on by default
Sep 01 11:36:00.333 INFO kablam! 
Sep 01 11:36:00.372 INFO kablam! warning: unused variable: `user2`
Sep 01 11:36:00.372 INFO kablam!   --> chapter5/src/main.rs:12:9
Sep 01 11:36:00.372 INFO kablam!    |
Sep 01 11:36:00.372 INFO kablam! 12 |     let user2 = User {
Sep 01 11:36:00.372 INFO kablam!    |         ^^^^^ help: consider using `_user2` instead
Sep 01 11:36:00.372 INFO kablam!    |
Sep 01 11:36:00.372 INFO kablam!    = note: #[warn(unused_variables)] on by default
Sep 01 11:36:00.372 INFO kablam! 
Sep 01 11:36:00.372 INFO kablam! warning: unused variable: `black`
Sep 01 11:36:00.372 INFO kablam!   --> chapter5/src/main.rs:21:9
Sep 01 11:36:00.373 INFO kablam!    |
Sep 01 11:36:00.373 INFO kablam! 21 |     let black = Color(0, 0, 0);
Sep 01 11:36:00.373 INFO kablam!    |         ^^^^^ help: consider using `_black` instead
Sep 01 11:36:00.373 INFO kablam! 
Sep 01 11:36:00.378 INFO kablam! warning: unused variable: `some_u8_value`
Sep 01 11:36:00.379 INFO kablam!   --> chapter6/src/main.rs:29:9
Sep 01 11:36:00.379 INFO kablam!    |
Sep 01 11:36:00.379 INFO kablam! 29 |     let some_u8_value = Some(0u8);
Sep 01 11:36:00.379 INFO kablam!    |         ^^^^^^^^^^^^^ help: consider using `_some_u8_value` instead
Sep 01 11:36:00.379 INFO kablam!    |
Sep 01 11:36:00.380 INFO kablam!    = note: #[warn(unused_variables)] on by default
Sep 01 11:36:00.380 INFO kablam! 
Sep 01 11:36:00.399 INFO kablam! warning: field is never used: `sign_in_count`
Sep 01 11:36:00.399 INFO kablam!   --> chapter5/src/main.rs:53:5
Sep 01 11:36:00.399 INFO kablam!    |
Sep 01 11:36:00.399 INFO kablam! 53 |     sign_in_count: u64,
Sep 01 11:36:00.399 INFO kablam!    |     ^^^^^^^^^^^^^^^^^^
Sep 01 11:36:00.399 INFO kablam!    |
Sep 01 11:36:00.399 INFO kablam!    = note: #[warn(dead_code)] on by default
Sep 01 11:36:00.399 INFO kablam! 
Sep 01 11:36:00.399 INFO kablam! warning: field is never used: `active`
Sep 01 11:36:00.399 INFO kablam!   --> chapter5/src/main.rs:54:5
Sep 01 11:36:00.399 INFO kablam!    |
Sep 01 11:36:00.399 INFO kablam! 54 |     active: bool,
Sep 01 11:36:00.399 INFO kablam!    |     ^^^^^^^^^^^^
Sep 01 11:36:00.399 INFO kablam! 
Sep 01 11:36:00.400 INFO kablam! warning: method is never used: `new`
Sep 01 11:36:00.400 INFO kablam!   --> chapter5/src/main.rs:67:5
Sep 01 11:36:00.400 INFO kablam!    |
Sep 01 11:36:00.400 INFO kablam! 67 |     fn new(email: String, username: String) -> User {
Sep 01 11:36:00.400 INFO kablam!    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Sep 01 11:36:00.400 INFO kablam! 
Sep 01 11:36:00.400 INFO kablam! warning: method is never used: `square`
Sep 01 11:36:00.401 INFO kablam!   --> chapter5/src/main.rs:97:5
Sep 01 11:36:00.401 INFO kablam!    |
Sep 01 11:36:00.401 INFO kablam! 97 |     fn square(size: u32) -> Rectangle {
Sep 01 11:36:00.401 INFO kablam!    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Sep 01 11:36:00.401 INFO kablam! 
Sep 01 11:36:00.401 INFO kablam! warning: method is never used: `widen`
Sep 01 11:36:00.401 INFO kablam!    --> chapter5/src/main.rs:105:5
Sep 01 11:36:00.401 INFO kablam!     |
Sep 01 11:36:00.401 INFO kablam! 105 |     fn widen(&mut self, n: u32) {
Sep 01 11:36:00.401 INFO kablam!     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^
Sep 01 11:36:00.401 INFO kablam! 
Sep 01 11:36:00.401 INFO kablam! warning: method is never used: `takes_ownership`
Sep 01 11:36:00.401 INFO kablam!    --> chapter5/src/main.rs:109:5
Sep 01 11:36:00.401 INFO kablam!     |
Sep 01 11:36:00.401 INFO kablam! 109 |     fn takes_ownership(self) -> Rectangle {
Sep 01 11:36:00.401 INFO kablam!     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Sep 01 11:36:00.401 INFO kablam! 
Sep 01 11:36:00.402 INFO kablam! warning: method is never used: `transform`
Sep 01 11:36:00.402 INFO kablam!    --> chapter5/src/main.rs:113:5
Sep 01 11:36:00.402 INFO kablam!     |
Sep 01 11:36:00.402 INFO kablam! 113 |     fn transform(self, w: u32, h: u32) -> Rectangle {
Sep 01 11:36:00.402 INFO kablam!     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Sep 01 11:36:00.402 INFO kablam! 
Sep 01 11:36:00.402 INFO kablam! warning: unused variable: `s1`
Sep 01 11:36:00.402 INFO kablam!   --> chapter4/src/main.rs:75:9
Sep 01 11:36:00.402 INFO kablam!    |
Sep 01 11:36:00.402 INFO kablam! 75 |     let s1 = &mut s;
Sep 01 11:36:00.402 INFO kablam!    |         ^^ help: consider using `_s1` instead
Sep 01 11:36:00.402 INFO kablam!    |
Sep 01 11:36:00.406 INFO kablam!    = note: #[warn(unused_variables)] on by default
Sep 01 11:36:00.406 INFO kablam! 
Sep 01 11:36:00.406 INFO kablam! warning: unused variable: `r1`
Sep 01 11:36:00.406 INFO kablam!   --> chapter4/src/main.rs:86:13
Sep 01 11:36:00.407 INFO kablam!    |
Sep 01 11:36:00.407 INFO kablam! 86 |         let r1 = &mut s;
Sep 01 11:36:00.407 INFO kablam!    |             ^^ help: consider using `_r1` instead
Sep 01 11:36:00.407 INFO kablam! 
Sep 01 11:36:00.407 INFO kablam! warning: unused variable: `r2`
Sep 01 11:36:00.407 INFO kablam!   --> chapter4/src/main.rs:88:9
Sep 01 11:36:00.407 INFO kablam!    |
Sep 01 11:36:00.407 INFO kablam! 88 |     let r2 = &mut s;
Sep 01 11:36:00.407 INFO kablam!    |         ^^ help: consider using `_r2` instead
Sep 01 11:36:00.407 INFO kablam! 
Sep 01 11:36:00.407 INFO kablam! warning: unused variable: `r1`
Sep 01 11:36:00.407 INFO kablam!   --> chapter4/src/main.rs:92:9
Sep 01 11:36:00.407 INFO kablam!    |
Sep 01 11:36:00.407 INFO kablam! 92 |     let r1 = &s;
Sep 01 11:36:00.407 INFO kablam!    |         ^^ help: consider using `_r1` instead
Sep 01 11:36:00.407 INFO kablam! 
Sep 01 11:36:00.407 INFO kablam! warning: unused variable: `r2`
Sep 01 11:36:00.407 INFO kablam!   --> chapter4/src/main.rs:94:9
Sep 01 11:36:00.407 INFO kablam!    |
Sep 01 11:36:00.407 INFO kablam! 94 |     let r2 = &s;
Sep 01 11:36:00.407 INFO kablam!    |         ^^ help: consider using `_r2` instead
Sep 01 11:36:00.407 INFO kablam! 
Sep 01 11:36:00.427 INFO kablam! warning: variant is never constructed: `ChangeColor`
Sep 01 11:36:00.427 INFO kablam!   --> chapter6/src/main.rs:49:5
Sep 01 11:36:00.427 INFO kablam!    |
Sep 01 11:36:00.427 INFO kablam! 49 |     ChangeColor(i32, i32, i32),
Sep 01 11:36:00.427 INFO kablam!    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^
Sep 01 11:36:00.427 INFO kablam!    |
Sep 01 11:36:00.427 INFO kablam!    = note: #[warn(dead_code)] on by default
Sep 01 11:36:00.427 INFO kablam! 
Sep 01 11:36:00.428 INFO kablam! warning: variant is never constructed: `Alabama`
Sep 01 11:36:00.428 INFO kablam!   --> chapter6/src/main.rs:59:5
Sep 01 11:36:00.428 INFO kablam!    |
Sep 01 11:36:00.428 INFO kablam! 59 |     Alabama,
Sep 01 11:36:00.428 INFO kablam!    |     ^^^^^^^
Sep 01 11:36:00.428 INFO kablam! 
Sep 01 11:36:00.429 INFO kablam! warning: variant is never constructed: `Nickel`
Sep 01 11:36:00.429 INFO kablam!   --> chapter6/src/main.rs:65:5
Sep 01 11:36:00.429 INFO kablam!    |
Sep 01 11:36:00.429 INFO kablam! 65 |     Nickel,
Sep 01 11:36:00.429 INFO kablam!    |     ^^^^^^
Sep 01 11:36:00.429 INFO kablam! 
Sep 01 11:36:00.430 INFO kablam! warning: variant is never constructed: `Dime`
Sep 01 11:36:00.430 INFO kablam!   --> chapter6/src/main.rs:66:5
Sep 01 11:36:00.430 INFO kablam!    |
Sep 01 11:36:00.430 INFO kablam! 66 |     Dime,
Sep 01 11:36:00.430 INFO kablam!    |     ^^^^
Sep 01 11:36:00.430 INFO kablam! 
Sep 01 11:36:00.446 INFO kablam! warning: variable does not need to be mutable
Sep 01 11:36:00.446 INFO kablam!   --> chapter4/src/main.rs:90:9
Sep 01 11:36:00.446 INFO kablam!    |
Sep 01 11:36:00.446 INFO kablam! 90 |     let mut s = String::from("hello");
Sep 01 11:36:00.446 INFO kablam!    |         ----^
Sep 01 11:36:00.446 INFO kablam!    |         |
Sep 01 11:36:00.446 INFO kablam!    |         help: remove this `mut`
Sep 01 11:36:00.446 INFO kablam!    |
Sep 01 11:36:00.446 INFO kablam!    = note: #[warn(unused_mut)] on by default
Sep 01 11:36:00.446 INFO kablam! 
Sep 01 11:36:00.446 INFO kablam! warning: variable does not need to be mutable
Sep 01 11:36:00.446 INFO kablam!    --> chapter4/src/main.rs:108:9
Sep 01 11:36:00.446 INFO kablam!     |
Sep 01 11:36:00.446 INFO kablam! 108 |     let mut s = String::from("hello world");
Sep 01 11:36:00.446 INFO kablam!     |         ----^
Sep 01 11:36:00.446 INFO kablam!     |         |
Sep 01 11:36:00.447 INFO kablam!     |         help: remove this `mut`
Sep 01 11:36:00.447 INFO kablam! 
Sep 01 11:36:00.469 INFO kablam! warning: unused variable: `user2`
Sep 01 11:36:00.469 INFO kablam!   --> chapter5/src/main.rs:12:9
Sep 01 11:36:00.469 INFO kablam!    |
Sep 01 11:36:00.469 INFO kablam! 12 |     let user2 = User {
Sep 01 11:36:00.469 INFO kablam!    |         ^^^^^ help: consider using `_user2` instead
Sep 01 11:36:00.469 INFO kablam!    |
Sep 01 11:36:00.469 INFO kablam!    = note: #[warn(unused_variables)] on by default
Sep 01 11:36:00.469 INFO kablam! 
Sep 01 11:36:00.470 INFO kablam! warning: unused variable: `black`
Sep 01 11:36:00.470 INFO kablam!   --> chapter5/src/main.rs:21:9
Sep 01 11:36:00.470 INFO kablam!    |
Sep 01 11:36:00.470 INFO kablam! 21 |     let black = Color(0, 0, 0);
Sep 01 11:36:00.470 INFO kablam!    |         ^^^^^ help: consider using `_black` instead
Sep 01 11:36:00.470 INFO kablam! 
Sep 01 11:36:00.477 INFO kablam! warning: function is never used: `no_dangle`
Sep 01 11:36:00.477 INFO kablam!    --> chapter4/src/main.rs:168:1
Sep 01 11:36:00.478 INFO kablam!     |
Sep 01 11:36:00.478 INFO kablam! 168 | fn no_dangle() -> String {
Sep 01 11:36:00.478 INFO kablam!     | ^^^^^^^^^^^^^^^^^^^^^^^^
Sep 01 11:36:00.478 INFO kablam!     |
Sep 01 11:36:00.478 INFO kablam!     = note: #[warn(dead_code)] on by default
Sep 01 11:36:00.478 INFO kablam! 
Sep 01 11:36:00.491 INFO kablam! warning: field is never used: `sign_in_count`
Sep 01 11:36:00.492 INFO kablam!   --> chapter5/src/main.rs:53:5
Sep 01 11:36:00.492 INFO kablam!    |
Sep 01 11:36:00.492 INFO kablam! 53 |     sign_in_count: u64,
Sep 01 11:36:00.492 INFO kablam!    |     ^^^^^^^^^^^^^^^^^^
Sep 01 11:36:00.492 INFO kablam!    |
Sep 01 11:36:00.492 INFO kablam!    = note: #[warn(dead_code)] on by default
Sep 01 11:36:00.493 INFO kablam! 
Sep 01 11:36:00.493 INFO kablam! warning: field is never used: `active`
Sep 01 11:36:00.493 INFO kablam!   --> chapter5/src/main.rs:54:5
Sep 01 11:36:00.493 INFO kablam!    |
Sep 01 11:36:00.493 INFO kablam! 54 |     active: bool,
Sep 01 11:36:00.493 INFO kablam!    |     ^^^^^^^^^^^^
Sep 01 11:36:00.493 INFO kablam! 
Sep 01 11:36:00.494 INFO kablam! warning: method is never used: `new`
Sep 01 11:36:00.494 INFO kablam!   --> chapter5/src/main.rs:67:5
Sep 01 11:36:00.494 INFO kablam!    |
Sep 01 11:36:00.494 INFO kablam! 67 |     fn new(email: String, username: String) -> User {
Sep 01 11:36:00.494 INFO kablam!    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Sep 01 11:36:00.494 INFO kablam! 
Sep 01 11:36:00.494 INFO kablam! warning: method is never used: `square`
Sep 01 11:36:00.494 INFO kablam!   --> chapter5/src/main.rs:97:5
Sep 01 11:36:00.494 INFO kablam!    |
Sep 01 11:36:00.494 INFO kablam! 97 |     fn square(size: u32) -> Rectangle {
Sep 01 11:36:00.494 INFO kablam!    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Sep 01 11:36:00.494 INFO kablam! 
Sep 01 11:36:00.494 INFO kablam! warning: method is never used: `widen`
Sep 01 11:36:00.494 INFO kablam!    --> chapter5/src/main.rs:105:5
Sep 01 11:36:00.494 INFO kablam!     |
Sep 01 11:36:00.494 INFO kablam! 105 |     fn widen(&mut self, n: u32) {
Sep 01 11:36:00.494 INFO kablam!     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^
Sep 01 11:36:00.494 INFO kablam! 
Sep 01 11:36:00.495 INFO kablam! warning: method is never used: `takes_ownership`
Sep 01 11:36:00.495 INFO kablam!    --> chapter5/src/main.rs:109:5
Sep 01 11:36:00.495 INFO kablam!     |
Sep 01 11:36:00.495 INFO kablam! 109 |     fn takes_ownership(self) -> Rectangle {
Sep 01 11:36:00.495 INFO kablam!     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Sep 01 11:36:00.495 INFO kablam! 
Sep 01 11:36:00.495 INFO kablam! warning: method is never used: `transform`
Sep 01 11:36:00.495 INFO kablam!    --> chapter5/src/main.rs:113:5
Sep 01 11:36:00.495 INFO kablam!     |
Sep 01 11:36:00.495 INFO kablam! 113 |     fn transform(self, w: u32, h: u32) -> Rectangle {
Sep 01 11:36:00.495 INFO kablam!     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Sep 01 11:36:00.495 INFO kablam! 
Sep 01 11:36:00.644 INFO kablam! warning: variable does not need to be mutable
Sep 01 11:36:00.644 INFO kablam!   --> chapter8/src/main.rs:26:9
Sep 01 11:36:00.644 INFO kablam!    |
Sep 01 11:36:00.644 INFO kablam! 26 |     let mut v = vec![1, 2, 3, 4, 5];
Sep 01 11:36:00.644 INFO kablam!    |         ----^
Sep 01 11:36:00.644 INFO kablam!    |         |
Sep 01 11:36:00.644 INFO kablam!    |         help: remove this `mut`
Sep 01 11:36:00.644 INFO kablam!    |
Sep 01 11:36:00.644 INFO kablam!    = note: #[warn(unused_mut)] on by default
Sep 01 11:36:00.644 INFO kablam! 
Sep 01 11:36:00.685 INFO kablam!     Finished dev [unoptimized + debuginfo] target(s) in 1.57s
Sep 01 11:36:00.691 INFO kablam! su: No module specific data is present
Sep 01 11:36:01.104 INFO running `"docker" "rm" "-f" "5d94117f1189af176bca9b850bc513e51cbef7b970c7030f2727675c265567f7"`
Sep 01 11:36:01.226 INFO blam! 5d94117f1189af176bca9b850bc513e51cbef7b970c7030f2727675c265567f7