Dec 04 12:18:36.717 INFO checking pjungwir/rust-thread-read-to-string against master#c8ae2de8363be088604ffa2ccba84ff7ad7250bc for pr-56481
Dec 04 12:18:36.717 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-56481/worker-0/master#c8ae2de8363be088604ffa2ccba84ff7ad7250bc:/target:rw,Z" "-v" "/mnt/big/crater/work/local/test-source/worker-0/pr-56481/master#c8ae2de8363be088604ffa2ccba84ff7ad7250bc:/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 +c8ae2de8363be088604ffa2ccba84ff7ad7250bc-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"`
Dec 04 12:18:37.291 INFO [stdout] ec557eef9066b140f5ae20f585d2b43600cdaad4c271c7f727c2c57871cbe0a2
Dec 04 12:18:37.294 INFO running `"docker" "start" "-a" "ec557eef9066b140f5ae20f585d2b43600cdaad4c271c7f727c2c57871cbe0a2"`
Dec 04 12:18:39.794 INFO [stderr] usermod: no changes
Dec 04 12:18:39.927 INFO [stderr]     Checking mime v0.2.2
Dec 04 12:18:40.559 INFO [stderr]     Checking hyper v0.10.5
Dec 04 12:18:44.271 INFO [stderr]     Checking thread-read-to-string v0.1.0 (/source)
Dec 04 12:18:45.279 INFO [stderr] warning: unused import: `Request`
Dec 04 12:18:45.279 INFO [stderr]  --> src/main.rs:9:21
Dec 04 12:18:45.279 INFO [stderr]   |
Dec 04 12:18:45.279 INFO [stderr] 9 | use hyper::client::{Request, Response};
Dec 04 12:18:45.279 INFO [stderr]   |                     ^^^^^^^
Dec 04 12:18:45.279 INFO [stderr]   |
Dec 04 12:18:45.279 INFO [stderr]   = note: #[warn(unused_imports)] on by default
Dec 04 12:18:45.279 INFO [stderr] 
Dec 04 12:18:45.499 INFO [stderr] warning: unused variable: `t`
Dec 04 12:18:45.499 INFO [stderr]   --> src/main.rs:27:7
Dec 04 12:18:45.499 INFO [stderr]    |
Dec 04 12:18:45.499 INFO [stderr] 27 |   let t = thread::spawn(move || {
Dec 04 12:18:45.499 INFO [stderr]    |       ^ help: consider using `_t` instead
Dec 04 12:18:45.499 INFO [stderr]    |
Dec 04 12:18:45.499 INFO [stderr]    = note: #[warn(unused_variables)] on by default
Dec 04 12:18:45.499 INFO [stderr] 
Dec 04 12:18:45.499 INFO [stderr] warning: unused variable: `t`
Dec 04 12:18:45.499 INFO [stderr]   --> src/main.rs:73:7
Dec 04 12:18:45.499 INFO [stderr]    |
Dec 04 12:18:45.499 INFO [stderr] 73 |   let t = thread::spawn(move || {
Dec 04 12:18:45.499 INFO [stderr]    |       ^ help: consider using `_t` instead
Dec 04 12:18:45.499 INFO [stderr] 
Dec 04 12:18:45.499 INFO [stderr] warning: unused variable: `t`
Dec 04 12:18:45.499 INFO [stderr]    --> src/main.rs:108:7
Dec 04 12:18:45.499 INFO [stderr]     |
Dec 04 12:18:45.499 INFO [stderr] 108 |   let t = thread::spawn(move || {
Dec 04 12:18:45.499 INFO [stderr]     |       ^ help: consider using `_t` instead
Dec 04 12:18:45.499 INFO [stderr] 
Dec 04 12:18:45.499 INFO [stderr] warning: unused variable: `t`
Dec 04 12:18:45.499 INFO [stderr]    --> src/main.rs:141:7
Dec 04 12:18:45.499 INFO [stderr]     |
Dec 04 12:18:45.499 INFO [stderr] 141 |   let t = thread::spawn(move || {
Dec 04 12:18:45.499 INFO [stderr]     |       ^ help: consider using `_t` instead
Dec 04 12:18:45.499 INFO [stderr] 
Dec 04 12:18:45.499 INFO [stderr] warning: unused variable: `status_code`
Dec 04 12:18:45.499 INFO [stderr]    --> src/main.rs:185:8
Dec 04 12:18:45.499 INFO [stderr]     |
Dec 04 12:18:45.499 INFO [stderr] 185 |   let (status_code, buf) = get_url_with_timeout_3("http://example.com/").unwrap();
Dec 04 12:18:45.499 INFO [stderr]     |        ^^^^^^^^^^^ help: consider using `_status_code` instead
Dec 04 12:18:45.499 INFO [stderr] 
Dec 04 12:18:45.499 INFO [stderr] warning: unused variable: `status_code`
Dec 04 12:18:45.499 INFO [stderr]    --> src/main.rs:188:8
Dec 04 12:18:45.499 INFO [stderr]     |
Dec 04 12:18:45.499 INFO [stderr] 188 |   let (status_code, buf) = get_url_with_timeout_4("http://example.com/").unwrap();
Dec 04 12:18:45.499 INFO [stderr]     |        ^^^^^^^^^^^ help: consider using `_status_code` instead
Dec 04 12:18:45.499 INFO [stderr] 
Dec 04 12:18:45.499 INFO [stderr] warning: unused variable: `status_code`
Dec 04 12:18:45.499 INFO [stderr]    --> src/main.rs:193:7
Dec 04 12:18:45.500 INFO [stderr]     |
Dec 04 12:18:45.500 INFO [stderr] 193 |   let status_code = get_url_with_timeout_5("http://example.com/", &shbuf).unwrap();
Dec 04 12:18:45.500 INFO [stderr]     |       ^^^^^^^^^^^ help: consider using `_status_code` instead
Dec 04 12:18:45.500 INFO [stderr] 
Dec 04 12:18:45.500 INFO [stderr] warning: variable does not need to be mutable
Dec 04 12:18:45.500 INFO [stderr]   --> src/main.rs:19:7
Dec 04 12:18:45.500 INFO [stderr]    |
Dec 04 12:18:45.500 INFO [stderr] 19 |   let mut c = Client::new();
Dec 04 12:18:45.500 INFO [stderr]    |       ----^
Dec 04 12:18:45.500 INFO [stderr]    |       |
Dec 04 12:18:45.500 INFO [stderr]    |       help: remove this `mut`
Dec 04 12:18:45.500 INFO [stderr]    |
Dec 04 12:18:45.500 INFO [stderr]    = note: #[warn(unused_mut)] on by default
Dec 04 12:18:45.500 INFO [stderr] 
Dec 04 12:18:45.500 INFO [stderr] warning: variable does not need to be mutable
Dec 04 12:18:45.500 INFO [stderr]   --> src/main.rs:20:7
Dec 04 12:18:45.500 INFO [stderr]    |
Dec 04 12:18:45.500 INFO [stderr] 20 |   let mut req = c.get(url);
Dec 04 12:18:45.500 INFO [stderr]    |       ----^^^
Dec 04 12:18:45.500 INFO [stderr]    |       |
Dec 04 12:18:45.500 INFO [stderr]    |       help: remove this `mut`
Dec 04 12:18:45.500 INFO [stderr] 
Dec 04 12:18:45.523 INFO [stderr] warning: variable does not need to be mutable
Dec 04 12:18:45.523 INFO [stderr]   --> src/main.rs:74:9
Dec 04 12:18:45.523 INFO [stderr]    |
Dec 04 12:18:45.523 INFO [stderr] 74 |     let mut c = Client::new();
Dec 04 12:18:45.523 INFO [stderr]    |         ----^
Dec 04 12:18:45.523 INFO [stderr]    |         |
Dec 04 12:18:45.523 INFO [stderr]    |         help: remove this `mut`
Dec 04 12:18:45.523 INFO [stderr] 
Dec 04 12:18:45.523 INFO [stderr] warning: variable does not need to be mutable
Dec 04 12:18:45.523 INFO [stderr]   --> src/main.rs:75:9
Dec 04 12:18:45.523 INFO [stderr]    |
Dec 04 12:18:45.523 INFO [stderr] 75 |     let mut req = c.get(&url);
Dec 04 12:18:45.523 INFO [stderr]    |         ----^^^
Dec 04 12:18:45.523 INFO [stderr]    |         |
Dec 04 12:18:45.523 INFO [stderr]    |         help: remove this `mut`
Dec 04 12:18:45.523 INFO [stderr] 
Dec 04 12:18:45.523 INFO [stderr] warning: variable does not need to be mutable
Dec 04 12:18:45.523 INFO [stderr]   --> src/main.rs:76:9
Dec 04 12:18:45.523 INFO [stderr]    |
Dec 04 12:18:45.523 INFO [stderr] 76 |     let mut ret = match req.send() {
Dec 04 12:18:45.523 INFO [stderr]    |         ----^^^
Dec 04 12:18:45.523 INFO [stderr]    |         |
Dec 04 12:18:45.523 INFO [stderr]    |         help: remove this `mut`
Dec 04 12:18:45.523 INFO [stderr] 
Dec 04 12:18:45.523 INFO [stderr] warning: variable does not need to be mutable
Dec 04 12:18:45.523 INFO [stderr]    --> src/main.rs:109:9
Dec 04 12:18:45.523 INFO [stderr]     |
Dec 04 12:18:45.523 INFO [stderr] 109 |     let mut c = Client::new();
Dec 04 12:18:45.523 INFO [stderr]     |         ----^
Dec 04 12:18:45.523 INFO [stderr]     |         |
Dec 04 12:18:45.523 INFO [stderr]     |         help: remove this `mut`
Dec 04 12:18:45.523 INFO [stderr] 
Dec 04 12:18:45.523 INFO [stderr] warning: variable does not need to be mutable
Dec 04 12:18:45.523 INFO [stderr]    --> src/main.rs:110:9
Dec 04 12:18:45.523 INFO [stderr]     |
Dec 04 12:18:45.523 INFO [stderr] 110 |     let mut req = c.get(&url);
Dec 04 12:18:45.523 INFO [stderr]     |         ----^^^
Dec 04 12:18:45.523 INFO [stderr]     |         |
Dec 04 12:18:45.523 INFO [stderr]     |         help: remove this `mut`
Dec 04 12:18:45.523 INFO [stderr] 
Dec 04 12:18:45.524 INFO [stderr] warning: variable does not need to be mutable
Dec 04 12:18:45.524 INFO [stderr]    --> src/main.rs:111:9
Dec 04 12:18:45.524 INFO [stderr]     |
Dec 04 12:18:45.524 INFO [stderr] 111 |     let mut ret = match req.send() {
Dec 04 12:18:45.524 INFO [stderr]     |         ----^^^
Dec 04 12:18:45.524 INFO [stderr]     |         |
Dec 04 12:18:45.524 INFO [stderr]     |         help: remove this `mut`
Dec 04 12:18:45.524 INFO [stderr] 
Dec 04 12:18:45.524 INFO [stderr] warning: variable does not need to be mutable
Dec 04 12:18:45.524 INFO [stderr]    --> src/main.rs:142:9
Dec 04 12:18:45.524 INFO [stderr]     |
Dec 04 12:18:45.524 INFO [stderr] 142 |     let mut c = Client::new();
Dec 04 12:18:45.524 INFO [stderr]     |         ----^
Dec 04 12:18:45.524 INFO [stderr]     |         |
Dec 04 12:18:45.524 INFO [stderr]     |         help: remove this `mut`
Dec 04 12:18:45.524 INFO [stderr] 
Dec 04 12:18:45.524 INFO [stderr] warning: variable does not need to be mutable
Dec 04 12:18:45.524 INFO [stderr]    --> src/main.rs:143:9
Dec 04 12:18:45.524 INFO [stderr]     |
Dec 04 12:18:45.524 INFO [stderr] 143 |     let mut req = c.get(&url);
Dec 04 12:18:45.524 INFO [stderr]     |         ----^^^
Dec 04 12:18:45.524 INFO [stderr]     |         |
Dec 04 12:18:45.524 INFO [stderr]     |         help: remove this `mut`
Dec 04 12:18:45.524 INFO [stderr] 
Dec 04 12:18:45.524 INFO [stderr] warning: variable does not need to be mutable
Dec 04 12:18:45.524 INFO [stderr]    --> src/main.rs:144:9
Dec 04 12:18:45.524 INFO [stderr]     |
Dec 04 12:18:45.524 INFO [stderr] 144 |     let mut ret = match req.send() {
Dec 04 12:18:45.524 INFO [stderr]     |         ----^^^
Dec 04 12:18:45.524 INFO [stderr]     |         |
Dec 04 12:18:45.524 INFO [stderr]     |         help: remove this `mut`
Dec 04 12:18:45.524 INFO [stderr] 
Dec 04 12:18:45.524 INFO [stderr] warning: variable does not need to be mutable
Dec 04 12:18:45.524 INFO [stderr]    --> src/main.rs:137:38
Dec 04 12:18:45.524 INFO [stderr]     |
Dec 04 12:18:45.524 INFO [stderr] 137 | fn get_url_with_timeout_5(url: &str, mut shbuf: &Arc<Mutex<String>>) -> Result<u16, MyAppError> {
Dec 04 12:18:45.524 INFO [stderr]     |                                      ----^^^^^
Dec 04 12:18:45.524 INFO [stderr]     |                                      |
Dec 04 12:18:45.524 INFO [stderr]     |                                      help: remove this `mut`
Dec 04 12:18:45.524 INFO [stderr] 
Dec 04 12:18:45.579 INFO [stderr] warning: unused import: `Request`
Dec 04 12:18:45.579 INFO [stderr]  --> src/main.rs:9:21
Dec 04 12:18:45.579 INFO [stderr]   |
Dec 04 12:18:45.579 INFO [stderr] 9 | use hyper::client::{Request, Response};
Dec 04 12:18:45.579 INFO [stderr]   |                     ^^^^^^^
Dec 04 12:18:45.579 INFO [stderr]   |
Dec 04 12:18:45.579 INFO [stderr]   = note: #[warn(unused_imports)] on by default
Dec 04 12:18:45.579 INFO [stderr] 
Dec 04 12:18:45.647 INFO [stderr] warning: unused variable: `t`
Dec 04 12:18:45.647 INFO [stderr]   --> src/main.rs:27:7
Dec 04 12:18:45.647 INFO [stderr]    |
Dec 04 12:18:45.647 INFO [stderr] 27 |   let t = thread::spawn(move || {
Dec 04 12:18:45.647 INFO [stderr]    |       ^ help: consider using `_t` instead
Dec 04 12:18:45.647 INFO [stderr]    |
Dec 04 12:18:45.647 INFO [stderr]    = note: #[warn(unused_variables)] on by default
Dec 04 12:18:45.647 INFO [stderr] 
Dec 04 12:18:45.647 INFO [stderr] warning: unused variable: `t`
Dec 04 12:18:45.647 INFO [stderr]   --> src/main.rs:73:7
Dec 04 12:18:45.647 INFO [stderr]    |
Dec 04 12:18:45.647 INFO [stderr] 73 |   let t = thread::spawn(move || {
Dec 04 12:18:45.647 INFO [stderr]    |       ^ help: consider using `_t` instead
Dec 04 12:18:45.647 INFO [stderr] 
Dec 04 12:18:45.647 INFO [stderr] warning: unused variable: `t`
Dec 04 12:18:45.647 INFO [stderr]    --> src/main.rs:108:7
Dec 04 12:18:45.647 INFO [stderr]     |
Dec 04 12:18:45.647 INFO [stderr] 108 |   let t = thread::spawn(move || {
Dec 04 12:18:45.647 INFO [stderr]     |       ^ help: consider using `_t` instead
Dec 04 12:18:45.647 INFO [stderr] 
Dec 04 12:18:45.647 INFO [stderr] warning: unused variable: `t`
Dec 04 12:18:45.647 INFO [stderr]    --> src/main.rs:141:7
Dec 04 12:18:45.647 INFO [stderr]     |
Dec 04 12:18:45.647 INFO [stderr] 141 |   let t = thread::spawn(move || {
Dec 04 12:18:45.647 INFO [stderr]     |       ^ help: consider using `_t` instead
Dec 04 12:18:45.647 INFO [stderr] 
Dec 04 12:18:45.647 INFO [stderr] warning: unused variable: `status_code`
Dec 04 12:18:45.647 INFO [stderr]    --> src/main.rs:185:8
Dec 04 12:18:45.647 INFO [stderr]     |
Dec 04 12:18:45.647 INFO [stderr] 185 |   let (status_code, buf) = get_url_with_timeout_3("http://example.com/").unwrap();
Dec 04 12:18:45.647 INFO [stderr]     |        ^^^^^^^^^^^ help: consider using `_status_code` instead
Dec 04 12:18:45.647 INFO [stderr] 
Dec 04 12:18:45.647 INFO [stderr] warning: unused variable: `status_code`
Dec 04 12:18:45.647 INFO [stderr]    --> src/main.rs:188:8
Dec 04 12:18:45.647 INFO [stderr]     |
Dec 04 12:18:45.647 INFO [stderr] 188 |   let (status_code, buf) = get_url_with_timeout_4("http://example.com/").unwrap();
Dec 04 12:18:45.647 INFO [stderr]     |        ^^^^^^^^^^^ help: consider using `_status_code` instead
Dec 04 12:18:45.647 INFO [stderr] 
Dec 04 12:18:45.647 INFO [stderr] warning: unused variable: `status_code`
Dec 04 12:18:45.647 INFO [stderr]    --> src/main.rs:193:7
Dec 04 12:18:45.647 INFO [stderr]     |
Dec 04 12:18:45.647 INFO [stderr] 193 |   let status_code = get_url_with_timeout_5("http://example.com/", &shbuf).unwrap();
Dec 04 12:18:45.647 INFO [stderr]     |       ^^^^^^^^^^^ help: consider using `_status_code` instead
Dec 04 12:18:45.647 INFO [stderr] 
Dec 04 12:18:45.655 INFO [stderr] warning: variable does not need to be mutable
Dec 04 12:18:45.655 INFO [stderr]   --> src/main.rs:19:7
Dec 04 12:18:45.655 INFO [stderr]    |
Dec 04 12:18:45.655 INFO [stderr] 19 |   let mut c = Client::new();
Dec 04 12:18:45.655 INFO [stderr]    |       ----^
Dec 04 12:18:45.655 INFO [stderr]    |       |
Dec 04 12:18:45.655 INFO [stderr]    |       help: remove this `mut`
Dec 04 12:18:45.655 INFO [stderr]    |
Dec 04 12:18:45.655 INFO [stderr]    = note: #[warn(unused_mut)] on by default
Dec 04 12:18:45.655 INFO [stderr] 
Dec 04 12:18:45.655 INFO [stderr] warning: variable does not need to be mutable
Dec 04 12:18:45.655 INFO [stderr]   --> src/main.rs:20:7
Dec 04 12:18:45.655 INFO [stderr]    |
Dec 04 12:18:45.655 INFO [stderr] 20 |   let mut req = c.get(url);
Dec 04 12:18:45.655 INFO [stderr]    |       ----^^^
Dec 04 12:18:45.655 INFO [stderr]    |       |
Dec 04 12:18:45.655 INFO [stderr]    |       help: remove this `mut`
Dec 04 12:18:45.655 INFO [stderr] 
Dec 04 12:18:45.662 INFO [stderr] warning: variable does not need to be mutable
Dec 04 12:18:45.664 INFO [stderr]   --> src/main.rs:74:9
Dec 04 12:18:45.664 INFO [stderr]    |
Dec 04 12:18:45.664 INFO [stderr] 74 |     let mut c = Client::new();
Dec 04 12:18:45.664 INFO [stderr]    |         ----^
Dec 04 12:18:45.665 INFO [stderr]    |         |
Dec 04 12:18:45.665 INFO [stderr]    |         help: remove this `mut`
Dec 04 12:18:45.665 INFO [stderr] 
Dec 04 12:18:45.665 INFO [stderr] warning: variable does not need to be mutable
Dec 04 12:18:45.665 INFO [stderr]   --> src/main.rs:75:9
Dec 04 12:18:45.665 INFO [stderr]    |
Dec 04 12:18:45.665 INFO [stderr] 75 |     let mut req = c.get(&url);
Dec 04 12:18:45.665 INFO [stderr]    |         ----^^^
Dec 04 12:18:45.665 INFO [stderr]    |         |
Dec 04 12:18:45.665 INFO [stderr]    |         help: remove this `mut`
Dec 04 12:18:45.665 INFO [stderr] 
Dec 04 12:18:45.665 INFO [stderr] warning: variable does not need to be mutable
Dec 04 12:18:45.665 INFO [stderr]   --> src/main.rs:76:9
Dec 04 12:18:45.665 INFO [stderr]    |
Dec 04 12:18:45.665 INFO [stderr] 76 |     let mut ret = match req.send() {
Dec 04 12:18:45.665 INFO [stderr]    |         ----^^^
Dec 04 12:18:45.665 INFO [stderr]    |         |
Dec 04 12:18:45.665 INFO [stderr]    |         help: remove this `mut`
Dec 04 12:18:45.665 INFO [stderr] 
Dec 04 12:18:45.665 INFO [stderr] warning: variable does not need to be mutable
Dec 04 12:18:45.665 INFO [stderr]    --> src/main.rs:109:9
Dec 04 12:18:45.665 INFO [stderr]     |
Dec 04 12:18:45.665 INFO [stderr] 109 |     let mut c = Client::new();
Dec 04 12:18:45.665 INFO [stderr]     |         ----^
Dec 04 12:18:45.665 INFO [stderr]     |         |
Dec 04 12:18:45.665 INFO [stderr]     |         help: remove this `mut`
Dec 04 12:18:45.665 INFO [stderr] 
Dec 04 12:18:45.665 INFO [stderr] warning: variable does not need to be mutable
Dec 04 12:18:45.665 INFO [stderr]    --> src/main.rs:110:9
Dec 04 12:18:45.665 INFO [stderr]     |
Dec 04 12:18:45.665 INFO [stderr] 110 |     let mut req = c.get(&url);
Dec 04 12:18:45.665 INFO [stderr]     |         ----^^^
Dec 04 12:18:45.665 INFO [stderr]     |         |
Dec 04 12:18:45.665 INFO [stderr]     |         help: remove this `mut`
Dec 04 12:18:45.665 INFO [stderr] 
Dec 04 12:18:45.670 INFO [stderr] warning: variable does not need to be mutable
Dec 04 12:18:45.670 INFO [stderr]    --> src/main.rs:111:9
Dec 04 12:18:45.670 INFO [stderr]     |
Dec 04 12:18:45.670 INFO [stderr] 111 |     let mut ret = match req.send() {
Dec 04 12:18:45.670 INFO [stderr]     |         ----^^^
Dec 04 12:18:45.670 INFO [stderr]     |         |
Dec 04 12:18:45.670 INFO [stderr]     |         help: remove this `mut`
Dec 04 12:18:45.670 INFO [stderr] 
Dec 04 12:18:45.671 INFO [stderr] warning: variable does not need to be mutable
Dec 04 12:18:45.671 INFO [stderr]    --> src/main.rs:142:9
Dec 04 12:18:45.671 INFO [stderr]     |
Dec 04 12:18:45.671 INFO [stderr] 142 |     let mut c = Client::new();
Dec 04 12:18:45.671 INFO [stderr]     |         ----^
Dec 04 12:18:45.671 INFO [stderr]     |         |
Dec 04 12:18:45.671 INFO [stderr]     |         help: remove this `mut`
Dec 04 12:18:45.671 INFO [stderr] 
Dec 04 12:18:45.671 INFO [stderr] warning: variable does not need to be mutable
Dec 04 12:18:45.671 INFO [stderr]    --> src/main.rs:143:9
Dec 04 12:18:45.671 INFO [stderr]     |
Dec 04 12:18:45.671 INFO [stderr] 143 |     let mut req = c.get(&url);
Dec 04 12:18:45.671 INFO [stderr]     |         ----^^^
Dec 04 12:18:45.671 INFO [stderr]     |         |
Dec 04 12:18:45.671 INFO [stderr]     |         help: remove this `mut`
Dec 04 12:18:45.671 INFO [stderr] 
Dec 04 12:18:45.671 INFO [stderr] warning: variable does not need to be mutable
Dec 04 12:18:45.671 INFO [stderr]    --> src/main.rs:144:9
Dec 04 12:18:45.671 INFO [stderr]     |
Dec 04 12:18:45.671 INFO [stderr] 144 |     let mut ret = match req.send() {
Dec 04 12:18:45.671 INFO [stderr]     |         ----^^^
Dec 04 12:18:45.671 INFO [stderr]     |         |
Dec 04 12:18:45.671 INFO [stderr]     |         help: remove this `mut`
Dec 04 12:18:45.671 INFO [stderr] 
Dec 04 12:18:45.671 INFO [stderr] warning: variable does not need to be mutable
Dec 04 12:18:45.671 INFO [stderr]    --> src/main.rs:137:38
Dec 04 12:18:45.671 INFO [stderr]     |
Dec 04 12:18:45.671 INFO [stderr] 137 | fn get_url_with_timeout_5(url: &str, mut shbuf: &Arc<Mutex<String>>) -> Result<u16, MyAppError> {
Dec 04 12:18:45.671 INFO [stderr]     |                                      ----^^^^^
Dec 04 12:18:45.671 INFO [stderr]     |                                      |
Dec 04 12:18:45.671 INFO [stderr]     |                                      help: remove this `mut`
Dec 04 12:18:45.671 INFO [stderr] 
Dec 04 12:18:45.715 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 5.90s
Dec 04 12:18:45.720 INFO [stderr] su: No module specific data is present
Dec 04 12:18:47.029 INFO running `"docker" "inspect" "ec557eef9066b140f5ae20f585d2b43600cdaad4c271c7f727c2c57871cbe0a2"`
Dec 04 12:18:47.407 INFO running `"docker" "rm" "-f" "ec557eef9066b140f5ae20f585d2b43600cdaad4c271c7f727c2c57871cbe0a2"`
Dec 04 12:18:47.766 INFO [stdout] ec557eef9066b140f5ae20f585d2b43600cdaad4c271c7f727c2c57871cbe0a2