Oct 12 15:37:33.761 INFO checking pjungwir/rust-thread-read-to-string against try#4021bd0b3c5815b087d6db10ce461e7e4854ade7 for pr-54977
Oct 12 15:37:33.761 INFO running `"docker" "create" "-v" "/mnt/big/crater/./work/local/target-dirs/pr-54977/worker-5/try#4021bd0b3c5815b087d6db10ce461e7e4854ade7:/target:rw,Z" "-v" "/mnt/big/crater/./work/local/test-source/worker-5/pr-54977/try#4021bd0b3c5815b087d6db10ce461e7e4854ade7:/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 +4021bd0b3c5815b087d6db10ce461e7e4854ade7-alt check --frozen --all --all-targets" "-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"`
Oct 12 15:37:34.154 INFO blam! 839db3b70680d14d1a1a40d57f210936269dffedb66ce25d52488858b60d2ab7
Oct 12 15:37:34.164 INFO running `"docker" "start" "-a" "839db3b70680d14d1a1a40d57f210936269dffedb66ce25d52488858b60d2ab7"`
Oct 12 15:37:35.573 INFO kablam! usermod: no changes
Oct 12 15:37:35.768 INFO kablam!     Checking num_cpus v1.3.0
Oct 12 15:37:35.768 INFO kablam!     Checking mime v0.2.2
Oct 12 15:37:35.773 INFO kablam!    Compiling hyper v0.10.5
Oct 12 15:37:41.052 INFO kablam!     Checking thread-read-to-string v0.1.0 (/source)
Oct 12 15:37:41.820 INFO kablam! warning: unused import: `Request`
Oct 12 15:37:41.820 INFO kablam!  --> src/main.rs:9:21
Oct 12 15:37:41.820 INFO kablam!   |
Oct 12 15:37:41.820 INFO kablam! 9 | use hyper::client::{Request, Response};
Oct 12 15:37:41.820 INFO kablam!   |                     ^^^^^^^
Oct 12 15:37:41.820 INFO kablam!   |
Oct 12 15:37:41.820 INFO kablam!   = note: #[warn(unused_imports)] on by default
Oct 12 15:37:41.820 INFO kablam! 
Oct 12 15:37:41.904 INFO kablam! warning: unused import: `Request`
Oct 12 15:37:41.904 INFO kablam!  --> src/main.rs:9:21
Oct 12 15:37:41.904 INFO kablam!   |
Oct 12 15:37:41.904 INFO kablam! 9 | use hyper::client::{Request, Response};
Oct 12 15:37:41.904 INFO kablam!   |                     ^^^^^^^
Oct 12 15:37:41.904 INFO kablam!   |
Oct 12 15:37:41.904 INFO kablam!   = note: #[warn(unused_imports)] on by default
Oct 12 15:37:41.904 INFO kablam! 
Oct 12 15:37:41.923 INFO kablam! warning: unused variable: `t`
Oct 12 15:37:41.923 INFO kablam!   --> src/main.rs:27:7
Oct 12 15:37:41.923 INFO kablam!    |
Oct 12 15:37:41.923 INFO kablam! 27 |   let t = thread::spawn(move || {
Oct 12 15:37:41.923 INFO kablam!    |       ^ help: consider using `_t` instead
Oct 12 15:37:41.923 INFO kablam!    |
Oct 12 15:37:41.923 INFO kablam!    = note: #[warn(unused_variables)] on by default
Oct 12 15:37:41.923 INFO kablam! 
Oct 12 15:37:41.923 INFO kablam! warning: unused variable: `t`
Oct 12 15:37:41.923 INFO kablam!   --> src/main.rs:73:7
Oct 12 15:37:41.923 INFO kablam!    |
Oct 12 15:37:41.923 INFO kablam! 73 |   let t = thread::spawn(move || {
Oct 12 15:37:41.923 INFO kablam!    |       ^ help: consider using `_t` instead
Oct 12 15:37:41.923 INFO kablam! 
Oct 12 15:37:41.928 INFO kablam! warning: unused variable: `t`
Oct 12 15:37:41.928 INFO kablam!    --> src/main.rs:108:7
Oct 12 15:37:41.928 INFO kablam!     |
Oct 12 15:37:41.928 INFO kablam! 108 |   let t = thread::spawn(move || {
Oct 12 15:37:41.928 INFO kablam!     |       ^ help: consider using `_t` instead
Oct 12 15:37:41.928 INFO kablam! 
Oct 12 15:37:41.928 INFO kablam! warning: unused variable: `t`
Oct 12 15:37:41.928 INFO kablam!    --> src/main.rs:141:7
Oct 12 15:37:41.928 INFO kablam!     |
Oct 12 15:37:41.928 INFO kablam! 141 |   let t = thread::spawn(move || {
Oct 12 15:37:41.928 INFO kablam!     |       ^ help: consider using `_t` instead
Oct 12 15:37:41.928 INFO kablam! 
Oct 12 15:37:41.928 INFO kablam! warning: unused variable: `status_code`
Oct 12 15:37:41.928 INFO kablam!    --> src/main.rs:185:8
Oct 12 15:37:41.928 INFO kablam!     |
Oct 12 15:37:41.928 INFO kablam! 185 |   let (status_code, buf) = get_url_with_timeout_3("http://example.com/").unwrap();
Oct 12 15:37:41.928 INFO kablam!     |        ^^^^^^^^^^^ help: consider using `_status_code` instead
Oct 12 15:37:41.928 INFO kablam! 
Oct 12 15:37:41.928 INFO kablam! warning: unused variable: `status_code`
Oct 12 15:37:41.928 INFO kablam!    --> src/main.rs:188:8
Oct 12 15:37:41.928 INFO kablam!     |
Oct 12 15:37:41.928 INFO kablam! 188 |   let (status_code, buf) = get_url_with_timeout_4("http://example.com/").unwrap();
Oct 12 15:37:41.928 INFO kablam!     |        ^^^^^^^^^^^ help: consider using `_status_code` instead
Oct 12 15:37:41.928 INFO kablam! 
Oct 12 15:37:41.928 INFO kablam! warning: unused variable: `status_code`
Oct 12 15:37:41.928 INFO kablam!    --> src/main.rs:193:7
Oct 12 15:37:41.928 INFO kablam!     |
Oct 12 15:37:41.928 INFO kablam! 193 |   let status_code = get_url_with_timeout_5("http://example.com/", &shbuf).unwrap();
Oct 12 15:37:41.932 INFO kablam!     |       ^^^^^^^^^^^ help: consider using `_status_code` instead
Oct 12 15:37:41.932 INFO kablam! 
Oct 12 15:37:41.936 INFO kablam! warning: variable does not need to be mutable
Oct 12 15:37:41.936 INFO kablam!   --> src/main.rs:19:7
Oct 12 15:37:41.948 INFO kablam!    |
Oct 12 15:37:41.948 INFO kablam! 19 |   let mut c = Client::new();
Oct 12 15:37:41.948 INFO kablam!    |       ----^
Oct 12 15:37:41.948 INFO kablam!    |       |
Oct 12 15:37:41.948 INFO kablam!    |       help: remove this `mut`
Oct 12 15:37:41.948 INFO kablam!    |
Oct 12 15:37:41.948 INFO kablam!    = note: #[warn(unused_mut)] on by default
Oct 12 15:37:41.948 INFO kablam! 
Oct 12 15:37:41.948 INFO kablam! warning: variable does not need to be mutable
Oct 12 15:37:41.948 INFO kablam!   --> src/main.rs:20:7
Oct 12 15:37:41.948 INFO kablam!    |
Oct 12 15:37:41.948 INFO kablam! 20 |   let mut req = c.get(url);
Oct 12 15:37:41.948 INFO kablam!    |       ----^^^
Oct 12 15:37:41.948 INFO kablam!    |       |
Oct 12 15:37:41.948 INFO kablam!    |       help: remove this `mut`
Oct 12 15:37:41.948 INFO kablam! 
Oct 12 15:37:41.948 INFO kablam! warning: variable does not need to be mutable
Oct 12 15:37:41.948 INFO kablam!   --> src/main.rs:74:9
Oct 12 15:37:41.948 INFO kablam!    |
Oct 12 15:37:41.948 INFO kablam! 74 |     let mut c = Client::new();
Oct 12 15:37:41.948 INFO kablam!    |         ----^
Oct 12 15:37:41.948 INFO kablam!    |         |
Oct 12 15:37:41.948 INFO kablam!    |         help: remove this `mut`
Oct 12 15:37:41.948 INFO kablam! 
Oct 12 15:37:41.948 INFO kablam! warning: variable does not need to be mutable
Oct 12 15:37:41.948 INFO kablam!   --> src/main.rs:75:9
Oct 12 15:37:41.948 INFO kablam!    |
Oct 12 15:37:41.949 INFO kablam! 75 |     let mut req = c.get(&url);
Oct 12 15:37:41.949 INFO kablam!    |         ----^^^
Oct 12 15:37:41.949 INFO kablam!    |         |
Oct 12 15:37:41.949 INFO kablam!    |         help: remove this `mut`
Oct 12 15:37:41.949 INFO kablam! 
Oct 12 15:37:41.949 INFO kablam! warning: variable does not need to be mutable
Oct 12 15:37:41.949 INFO kablam!   --> src/main.rs:76:9
Oct 12 15:37:41.956 INFO kablam!    |
Oct 12 15:37:41.956 INFO kablam! 76 |     let mut ret = match req.send() {
Oct 12 15:37:41.956 INFO kablam!    |         ----^^^
Oct 12 15:37:41.956 INFO kablam!    |         |
Oct 12 15:37:41.956 INFO kablam!    |         help: remove this `mut`
Oct 12 15:37:41.956 INFO kablam! 
Oct 12 15:37:41.956 INFO kablam! warning: variable does not need to be mutable
Oct 12 15:37:41.956 INFO kablam!    --> src/main.rs:109:9
Oct 12 15:37:41.956 INFO kablam!     |
Oct 12 15:37:41.956 INFO kablam! 109 |     let mut c = Client::new();
Oct 12 15:37:41.956 INFO kablam!     |         ----^
Oct 12 15:37:41.956 INFO kablam!     |         |
Oct 12 15:37:41.956 INFO kablam!     |         help: remove this `mut`
Oct 12 15:37:41.956 INFO kablam! 
Oct 12 15:37:41.956 INFO kablam! warning: variable does not need to be mutable
Oct 12 15:37:41.956 INFO kablam!    --> src/main.rs:110:9
Oct 12 15:37:41.956 INFO kablam!     |
Oct 12 15:37:41.956 INFO kablam! 110 |     let mut req = c.get(&url);
Oct 12 15:37:41.956 INFO kablam!     |         ----^^^
Oct 12 15:37:41.956 INFO kablam!     |         |
Oct 12 15:37:41.956 INFO kablam!     |         help: remove this `mut`
Oct 12 15:37:41.956 INFO kablam! 
Oct 12 15:37:41.956 INFO kablam! warning: variable does not need to be mutable
Oct 12 15:37:41.956 INFO kablam!    --> src/main.rs:111:9
Oct 12 15:37:41.956 INFO kablam!     |
Oct 12 15:37:41.956 INFO kablam! 111 |     let mut ret = match req.send() {
Oct 12 15:37:41.956 INFO kablam!     |         ----^^^
Oct 12 15:37:41.956 INFO kablam!     |         |
Oct 12 15:37:41.956 INFO kablam!     |         help: remove this `mut`
Oct 12 15:37:41.956 INFO kablam! 
Oct 12 15:37:41.960 INFO kablam! warning: variable does not need to be mutable
Oct 12 15:37:41.960 INFO kablam!    --> src/main.rs:142:9
Oct 12 15:37:41.960 INFO kablam!     |
Oct 12 15:37:41.960 INFO kablam! 142 |     let mut c = Client::new();
Oct 12 15:37:41.960 INFO kablam!     |         ----^
Oct 12 15:37:41.960 INFO kablam!     |         |
Oct 12 15:37:41.960 INFO kablam!     |         help: remove this `mut`
Oct 12 15:37:41.960 INFO kablam! 
Oct 12 15:37:41.961 INFO kablam! warning: variable does not need to be mutable
Oct 12 15:37:41.961 INFO kablam!    --> src/main.rs:143:9
Oct 12 15:37:41.961 INFO kablam!     |
Oct 12 15:37:41.961 INFO kablam! 143 |     let mut req = c.get(&url);
Oct 12 15:37:41.961 INFO kablam!     |         ----^^^
Oct 12 15:37:41.961 INFO kablam!     |         |
Oct 12 15:37:41.961 INFO kablam!     |         help: remove this `mut`
Oct 12 15:37:41.961 INFO kablam! 
Oct 12 15:37:41.961 INFO kablam! warning: variable does not need to be mutable
Oct 12 15:37:41.961 INFO kablam!    --> src/main.rs:144:9
Oct 12 15:37:41.961 INFO kablam!     |
Oct 12 15:37:41.961 INFO kablam! 144 |     let mut ret = match req.send() {
Oct 12 15:37:41.961 INFO kablam!     |         ----^^^
Oct 12 15:37:41.961 INFO kablam!     |         |
Oct 12 15:37:41.962 INFO kablam!     |         help: remove this `mut`
Oct 12 15:37:41.962 INFO kablam! 
Oct 12 15:37:41.962 INFO kablam! warning: variable does not need to be mutable
Oct 12 15:37:41.962 INFO kablam!    --> src/main.rs:137:38
Oct 12 15:37:41.962 INFO kablam!     |
Oct 12 15:37:41.962 INFO kablam! 137 | fn get_url_with_timeout_5(url: &str, mut shbuf: &Arc<Mutex<String>>) -> Result<u16, MyAppError> {
Oct 12 15:37:41.962 INFO kablam!     |                                      ----^^^^^
Oct 12 15:37:41.962 INFO kablam!     |                                      |
Oct 12 15:37:41.962 INFO kablam!     |                                      help: remove this `mut`
Oct 12 15:37:41.962 INFO kablam! 
Oct 12 15:37:42.096 INFO kablam! warning: unused variable: `t`
Oct 12 15:37:42.096 INFO kablam!   --> src/main.rs:27:7
Oct 12 15:37:42.096 INFO kablam!    |
Oct 12 15:37:42.096 INFO kablam! 27 |   let t = thread::spawn(move || {
Oct 12 15:37:42.096 INFO kablam!    |       ^ help: consider using `_t` instead
Oct 12 15:37:42.096 INFO kablam!    |
Oct 12 15:37:42.096 INFO kablam!    = note: #[warn(unused_variables)] on by default
Oct 12 15:37:42.096 INFO kablam! 
Oct 12 15:37:42.096 INFO kablam! warning: unused variable: `t`
Oct 12 15:37:42.096 INFO kablam!   --> src/main.rs:73:7
Oct 12 15:37:42.096 INFO kablam!    |
Oct 12 15:37:42.096 INFO kablam! 73 |   let t = thread::spawn(move || {
Oct 12 15:37:42.096 INFO kablam!    |       ^ help: consider using `_t` instead
Oct 12 15:37:42.096 INFO kablam! 
Oct 12 15:37:42.096 INFO kablam! warning: unused variable: `t`
Oct 12 15:37:42.096 INFO kablam!    --> src/main.rs:108:7
Oct 12 15:37:42.096 INFO kablam!     |
Oct 12 15:37:42.096 INFO kablam! 108 |   let t = thread::spawn(move || {
Oct 12 15:37:42.096 INFO kablam!     |       ^ help: consider using `_t` instead
Oct 12 15:37:42.096 INFO kablam! 
Oct 12 15:37:42.096 INFO kablam! warning: unused variable: `t`
Oct 12 15:37:42.096 INFO kablam!    --> src/main.rs:141:7
Oct 12 15:37:42.096 INFO kablam!     |
Oct 12 15:37:42.096 INFO kablam! 141 |   let t = thread::spawn(move || {
Oct 12 15:37:42.096 INFO kablam!     |       ^ help: consider using `_t` instead
Oct 12 15:37:42.096 INFO kablam! 
Oct 12 15:37:42.096 INFO kablam! warning: unused variable: `status_code`
Oct 12 15:37:42.096 INFO kablam!    --> src/main.rs:185:8
Oct 12 15:37:42.096 INFO kablam!     |
Oct 12 15:37:42.096 INFO kablam! 185 |   let (status_code, buf) = get_url_with_timeout_3("http://example.com/").unwrap();
Oct 12 15:37:42.096 INFO kablam!     |        ^^^^^^^^^^^ help: consider using `_status_code` instead
Oct 12 15:37:42.096 INFO kablam! 
Oct 12 15:37:42.096 INFO kablam! warning: unused variable: `status_code`
Oct 12 15:37:42.096 INFO kablam!    --> src/main.rs:188:8
Oct 12 15:37:42.096 INFO kablam!     |
Oct 12 15:37:42.096 INFO kablam! 188 |   let (status_code, buf) = get_url_with_timeout_4("http://example.com/").unwrap();
Oct 12 15:37:42.096 INFO kablam!     |        ^^^^^^^^^^^ help: consider using `_status_code` instead
Oct 12 15:37:42.096 INFO kablam! 
Oct 12 15:37:42.096 INFO kablam! warning: unused variable: `status_code`
Oct 12 15:37:42.096 INFO kablam!    --> src/main.rs:193:7
Oct 12 15:37:42.096 INFO kablam!     |
Oct 12 15:37:42.096 INFO kablam! 193 |   let status_code = get_url_with_timeout_5("http://example.com/", &shbuf).unwrap();
Oct 12 15:37:42.096 INFO kablam!     |       ^^^^^^^^^^^ help: consider using `_status_code` instead
Oct 12 15:37:42.096 INFO kablam! 
Oct 12 15:37:42.104 INFO kablam! warning: variable does not need to be mutable
Oct 12 15:37:42.104 INFO kablam!   --> src/main.rs:19:7
Oct 12 15:37:42.104 INFO kablam!    |
Oct 12 15:37:42.104 INFO kablam! 19 |   let mut c = Client::new();
Oct 12 15:37:42.104 INFO kablam!    |       ----^
Oct 12 15:37:42.104 INFO kablam!    |       |
Oct 12 15:37:42.104 INFO kablam!    |       help: remove this `mut`
Oct 12 15:37:42.104 INFO kablam!    |
Oct 12 15:37:42.104 INFO kablam!    = note: #[warn(unused_mut)] on by default
Oct 12 15:37:42.104 INFO kablam! 
Oct 12 15:37:42.104 INFO kablam! warning: variable does not need to be mutable
Oct 12 15:37:42.104 INFO kablam!   --> src/main.rs:20:7
Oct 12 15:37:42.104 INFO kablam!    |
Oct 12 15:37:42.104 INFO kablam! 20 |   let mut req = c.get(url);
Oct 12 15:37:42.104 INFO kablam!    |       ----^^^
Oct 12 15:37:42.104 INFO kablam!    |       |
Oct 12 15:37:42.104 INFO kablam!    |       help: remove this `mut`
Oct 12 15:37:42.104 INFO kablam! 
Oct 12 15:37:42.108 INFO kablam! warning: variable does not need to be mutable
Oct 12 15:37:42.108 INFO kablam!   --> src/main.rs:74:9
Oct 12 15:37:42.108 INFO kablam!    |
Oct 12 15:37:42.108 INFO kablam! 74 |     let mut c = Client::new();
Oct 12 15:37:42.117 INFO kablam!    |         ----^
Oct 12 15:37:42.117 INFO kablam!    |         |
Oct 12 15:37:42.117 INFO kablam!    |         help: remove this `mut`
Oct 12 15:37:42.117 INFO kablam! 
Oct 12 15:37:42.117 INFO kablam! warning: variable does not need to be mutable
Oct 12 15:37:42.117 INFO kablam!   --> src/main.rs:75:9
Oct 12 15:37:42.117 INFO kablam!    |
Oct 12 15:37:42.117 INFO kablam! 75 |     let mut req = c.get(&url);
Oct 12 15:37:42.117 INFO kablam!    |         ----^^^
Oct 12 15:37:42.117 INFO kablam!    |         |
Oct 12 15:37:42.117 INFO kablam!    |         help: remove this `mut`
Oct 12 15:37:42.117 INFO kablam! 
Oct 12 15:37:42.117 INFO kablam! warning: variable does not need to be mutable
Oct 12 15:37:42.117 INFO kablam!   --> src/main.rs:76:9
Oct 12 15:37:42.117 INFO kablam!    |
Oct 12 15:37:42.117 INFO kablam! 76 |     let mut ret = match req.send() {
Oct 12 15:37:42.117 INFO kablam!    |         ----^^^
Oct 12 15:37:42.117 INFO kablam!    |         |
Oct 12 15:37:42.117 INFO kablam!    |         help: remove this `mut`
Oct 12 15:37:42.117 INFO kablam! 
Oct 12 15:37:42.117 INFO kablam! warning: variable does not need to be mutable
Oct 12 15:37:42.117 INFO kablam!    --> src/main.rs:109:9
Oct 12 15:37:42.117 INFO kablam!     |
Oct 12 15:37:42.117 INFO kablam! 109 |     let mut c = Client::new();
Oct 12 15:37:42.117 INFO kablam!     |         ----^
Oct 12 15:37:42.117 INFO kablam!     |         |
Oct 12 15:37:42.117 INFO kablam!     |         help: remove this `mut`
Oct 12 15:37:42.117 INFO kablam! 
Oct 12 15:37:42.117 INFO kablam! warning: variable does not need to be mutable
Oct 12 15:37:42.117 INFO kablam!    --> src/main.rs:110:9
Oct 12 15:37:42.117 INFO kablam!     |
Oct 12 15:37:42.117 INFO kablam! 110 |     let mut req = c.get(&url);
Oct 12 15:37:42.117 INFO kablam!     |         ----^^^
Oct 12 15:37:42.117 INFO kablam!     |         |
Oct 12 15:37:42.117 INFO kablam!     |         help: remove this `mut`
Oct 12 15:37:42.117 INFO kablam! 
Oct 12 15:37:42.117 INFO kablam! warning: variable does not need to be mutable
Oct 12 15:37:42.117 INFO kablam!    --> src/main.rs:111:9
Oct 12 15:37:42.117 INFO kablam!     |
Oct 12 15:37:42.117 INFO kablam! 111 |     let mut ret = match req.send() {
Oct 12 15:37:42.117 INFO kablam!     |         ----^^^
Oct 12 15:37:42.117 INFO kablam!     |         |
Oct 12 15:37:42.117 INFO kablam!     |         help: remove this `mut`
Oct 12 15:37:42.117 INFO kablam! 
Oct 12 15:37:42.117 INFO kablam! warning: variable does not need to be mutable
Oct 12 15:37:42.117 INFO kablam!    --> src/main.rs:142:9
Oct 12 15:37:42.117 INFO kablam!     |
Oct 12 15:37:42.124 INFO kablam! 142 |     let mut c = Client::new();
Oct 12 15:37:42.124 INFO kablam!     |         ----^
Oct 12 15:37:42.124 INFO kablam!     |         |
Oct 12 15:37:42.124 INFO kablam!     |         help: remove this `mut`
Oct 12 15:37:42.124 INFO kablam! 
Oct 12 15:37:42.124 INFO kablam! warning: variable does not need to be mutable
Oct 12 15:37:42.124 INFO kablam!    --> src/main.rs:143:9
Oct 12 15:37:42.124 INFO kablam!     |
Oct 12 15:37:42.124 INFO kablam! 143 |     let mut req = c.get(&url);
Oct 12 15:37:42.124 INFO kablam!     |         ----^^^
Oct 12 15:37:42.124 INFO kablam!     |         |
Oct 12 15:37:42.124 INFO kablam!     |         help: remove this `mut`
Oct 12 15:37:42.124 INFO kablam! 
Oct 12 15:37:42.124 INFO kablam! warning: variable does not need to be mutable
Oct 12 15:37:42.124 INFO kablam!    --> src/main.rs:144:9
Oct 12 15:37:42.124 INFO kablam!     |
Oct 12 15:37:42.124 INFO kablam! 144 |     let mut ret = match req.send() {
Oct 12 15:37:42.124 INFO kablam!     |         ----^^^
Oct 12 15:37:42.124 INFO kablam!     |         |
Oct 12 15:37:42.124 INFO kablam!     |         help: remove this `mut`
Oct 12 15:37:42.124 INFO kablam! 
Oct 12 15:37:42.124 INFO kablam! warning: variable does not need to be mutable
Oct 12 15:37:42.124 INFO kablam!    --> src/main.rs:137:38
Oct 12 15:37:42.124 INFO kablam!     |
Oct 12 15:37:42.124 INFO kablam! 137 | fn get_url_with_timeout_5(url: &str, mut shbuf: &Arc<Mutex<String>>) -> Result<u16, MyAppError> {
Oct 12 15:37:42.124 INFO kablam!     |                                      ----^^^^^
Oct 12 15:37:42.124 INFO kablam!     |                                      |
Oct 12 15:37:42.124 INFO kablam!     |                                      help: remove this `mut`
Oct 12 15:37:42.124 INFO kablam! 
Oct 12 15:37:42.180 INFO kablam!     Finished dev [unoptimized + debuginfo] target(s) in 6.55s
Oct 12 15:37:42.184 INFO kablam! su: No module specific data is present
Oct 12 15:37:42.950 INFO running `"docker" "rm" "-f" "839db3b70680d14d1a1a40d57f210936269dffedb66ce25d52488858b60d2ab7"`
Oct 12 15:37:43.272 INFO blam! 839db3b70680d14d1a1a40d57f210936269dffedb66ce25d52488858b60d2ab7