Dec 19 10:52:43.937 INFO checking pjungwir/rust-thread-read-to-string against try#e70472fc501b855c9080f3772432c10fe20b8866 for pr-56955
Dec 19 10:52:43.937 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-56955/worker-1/try#e70472fc501b855c9080f3772432c10fe20b8866:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-56955/sources/try#e70472fc501b855c9080f3772432c10fe20b8866/gh/pjungwir/rust-thread-read-to-string:/opt/crater/workdir:ro,Z" "-v" "/mnt/big/crater/work/local/cargo-home:/opt/crater/cargo-home:ro,Z" "-v" "/mnt/big/crater/work/local/rustup-home:/opt/crater/rustup-home:ro,Z" "-e" "USER_ID=1000" "-e" "SOURCE_DIR=/opt/crater/workdir" "-e" "MAP_USER_ID=1000" "-e" "CARGO_TARGET_DIR=/opt/crater/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/crater/cargo-home" "-e" "RUSTUP_HOME=/opt/crater/rustup-home" "-w" "/opt/crater/workdir" "-m" "1536M" "--network" "none" "rustops/crates-build-env" "/opt/crater/cargo-home/bin/cargo" "+e70472fc501b855c9080f3772432c10fe20b8866-alt" "check" "--frozen" "--all" "--all-targets"`
Dec 19 10:52:44.440 INFO [stdout] 60529931be51b6fde91877d73b58791085efd3b91c093522f2e6320f97788745
Dec 19 10:52:44.446 INFO running `"docker" "start" "-a" "60529931be51b6fde91877d73b58791085efd3b91c093522f2e6320f97788745"`
Dec 19 10:52:46.296 INFO [stderr]     Checking mime v0.2.2
Dec 19 10:52:46.825 INFO [stderr]     Checking hyper v0.10.5
Dec 19 10:52:50.110 INFO [stderr]     Checking thread-read-to-string v0.1.0 (/opt/crater/workdir)
Dec 19 10:52:50.412 INFO [stderr] warning: unused import: `Request`
Dec 19 10:52:50.412 INFO [stderr]  --> src/main.rs:9:21
Dec 19 10:52:50.412 INFO [stderr]   |
Dec 19 10:52:50.412 INFO [stderr] 9 | use hyper::client::{Request, Response};
Dec 19 10:52:50.412 INFO [stderr]   |                     ^^^^^^^
Dec 19 10:52:50.412 INFO [stderr]   |
Dec 19 10:52:50.412 INFO [stderr]   = note: #[warn(unused_imports)] on by default
Dec 19 10:52:50.412 INFO [stderr] 
Dec 19 10:52:50.552 INFO [stderr] warning: unused variable: `t`
Dec 19 10:52:50.552 INFO [stderr]   --> src/main.rs:27:7
Dec 19 10:52:50.552 INFO [stderr]    |
Dec 19 10:52:50.552 INFO [stderr] 27 |   let t = thread::spawn(move || {
Dec 19 10:52:50.552 INFO [stderr]    |       ^ help: consider using `_t` instead
Dec 19 10:52:50.552 INFO [stderr]    |
Dec 19 10:52:50.552 INFO [stderr]    = note: #[warn(unused_variables)] on by default
Dec 19 10:52:50.552 INFO [stderr] 
Dec 19 10:52:50.552 INFO [stderr] warning: unused variable: `t`
Dec 19 10:52:50.552 INFO [stderr]   --> src/main.rs:73:7
Dec 19 10:52:50.552 INFO [stderr]    |
Dec 19 10:52:50.552 INFO [stderr] 73 |   let t = thread::spawn(move || {
Dec 19 10:52:50.552 INFO [stderr]    |       ^ help: consider using `_t` instead
Dec 19 10:52:50.552 INFO [stderr] 
Dec 19 10:52:50.552 INFO [stderr] warning: unused variable: `t`
Dec 19 10:52:50.552 INFO [stderr]    --> src/main.rs:108:7
Dec 19 10:52:50.553 INFO [stderr]     |
Dec 19 10:52:50.553 INFO [stderr] 108 |   let t = thread::spawn(move || {
Dec 19 10:52:50.553 INFO [stderr]     |       ^ help: consider using `_t` instead
Dec 19 10:52:50.553 INFO [stderr] 
Dec 19 10:52:50.553 INFO [stderr] warning: unused variable: `t`
Dec 19 10:52:50.553 INFO [stderr]    --> src/main.rs:141:7
Dec 19 10:52:50.553 INFO [stderr]     |
Dec 19 10:52:50.553 INFO [stderr] 141 |   let t = thread::spawn(move || {
Dec 19 10:52:50.553 INFO [stderr]     |       ^ help: consider using `_t` instead
Dec 19 10:52:50.553 INFO [stderr] 
Dec 19 10:52:50.553 INFO [stderr] warning: unused variable: `status_code`
Dec 19 10:52:50.553 INFO [stderr]    --> src/main.rs:185:8
Dec 19 10:52:50.553 INFO [stderr]     |
Dec 19 10:52:50.553 INFO [stderr] 185 |   let (status_code, buf) = get_url_with_timeout_3("http://example.com/").unwrap();
Dec 19 10:52:50.553 INFO [stderr]     |        ^^^^^^^^^^^ help: consider using `_status_code` instead
Dec 19 10:52:50.553 INFO [stderr] 
Dec 19 10:52:50.553 INFO [stderr] warning: unused variable: `status_code`
Dec 19 10:52:50.553 INFO [stderr]    --> src/main.rs:188:8
Dec 19 10:52:50.553 INFO [stderr]     |
Dec 19 10:52:50.553 INFO [stderr] 188 |   let (status_code, buf) = get_url_with_timeout_4("http://example.com/").unwrap();
Dec 19 10:52:50.553 INFO [stderr]     |        ^^^^^^^^^^^ help: consider using `_status_code` instead
Dec 19 10:52:50.553 INFO [stderr] 
Dec 19 10:52:50.553 INFO [stderr] warning: unused variable: `status_code`
Dec 19 10:52:50.553 INFO [stderr]    --> src/main.rs:193:7
Dec 19 10:52:50.553 INFO [stderr]     |
Dec 19 10:52:50.553 INFO [stderr] 193 |   let status_code = get_url_with_timeout_5("http://example.com/", &shbuf).unwrap();
Dec 19 10:52:50.553 INFO [stderr]     |       ^^^^^^^^^^^ help: consider using `_status_code` instead
Dec 19 10:52:50.553 INFO [stderr] 
Dec 19 10:52:50.553 INFO [stderr] warning: variable does not need to be mutable
Dec 19 10:52:50.553 INFO [stderr]   --> src/main.rs:19:7
Dec 19 10:52:50.553 INFO [stderr]    |
Dec 19 10:52:50.553 INFO [stderr] 19 |   let mut c = Client::new();
Dec 19 10:52:50.553 INFO [stderr]    |       ----^
Dec 19 10:52:50.553 INFO [stderr]    |       |
Dec 19 10:52:50.553 INFO [stderr]    |       help: remove this `mut`
Dec 19 10:52:50.553 INFO [stderr]    |
Dec 19 10:52:50.553 INFO [stderr]    = note: #[warn(unused_mut)] on by default
Dec 19 10:52:50.553 INFO [stderr] 
Dec 19 10:52:50.553 INFO [stderr] warning: variable does not need to be mutable
Dec 19 10:52:50.553 INFO [stderr]   --> src/main.rs:20:7
Dec 19 10:52:50.553 INFO [stderr]    |
Dec 19 10:52:50.553 INFO [stderr] 20 |   let mut req = c.get(url);
Dec 19 10:52:50.553 INFO [stderr]    |       ----^^^
Dec 19 10:52:50.553 INFO [stderr]    |       |
Dec 19 10:52:50.553 INFO [stderr]    |       help: remove this `mut`
Dec 19 10:52:50.553 INFO [stderr] 
Dec 19 10:52:50.564 INFO [stderr] warning: variable does not need to be mutable
Dec 19 10:52:50.564 INFO [stderr]   --> src/main.rs:74:9
Dec 19 10:52:50.564 INFO [stderr]    |
Dec 19 10:52:50.564 INFO [stderr] 74 |     let mut c = Client::new();
Dec 19 10:52:50.564 INFO [stderr]    |         ----^
Dec 19 10:52:50.564 INFO [stderr]    |         |
Dec 19 10:52:50.564 INFO [stderr]    |         help: remove this `mut`
Dec 19 10:52:50.564 INFO [stderr] 
Dec 19 10:52:50.564 INFO [stderr] warning: variable does not need to be mutable
Dec 19 10:52:50.564 INFO [stderr]   --> src/main.rs:75:9
Dec 19 10:52:50.564 INFO [stderr]    |
Dec 19 10:52:50.564 INFO [stderr] 75 |     let mut req = c.get(&url);
Dec 19 10:52:50.564 INFO [stderr]    |         ----^^^
Dec 19 10:52:50.564 INFO [stderr]    |         |
Dec 19 10:52:50.564 INFO [stderr]    |         help: remove this `mut`
Dec 19 10:52:50.564 INFO [stderr] 
Dec 19 10:52:50.564 INFO [stderr] warning: variable does not need to be mutable
Dec 19 10:52:50.564 INFO [stderr]   --> src/main.rs:76:9
Dec 19 10:52:50.564 INFO [stderr]    |
Dec 19 10:52:50.564 INFO [stderr] 76 |     let mut ret = match req.send() {
Dec 19 10:52:50.564 INFO [stderr]    |         ----^^^
Dec 19 10:52:50.564 INFO [stderr]    |         |
Dec 19 10:52:50.565 INFO [stderr]    |         help: remove this `mut`
Dec 19 10:52:50.565 INFO [stderr] 
Dec 19 10:52:50.567 INFO [stderr] warning: variable does not need to be mutable
Dec 19 10:52:50.567 INFO [stderr]    --> src/main.rs:109:9
Dec 19 10:52:50.567 INFO [stderr]     |
Dec 19 10:52:50.567 INFO [stderr] 109 |     let mut c = Client::new();
Dec 19 10:52:50.567 INFO [stderr]     |         ----^
Dec 19 10:52:50.567 INFO [stderr]     |         |
Dec 19 10:52:50.567 INFO [stderr]     |         help: remove this `mut`
Dec 19 10:52:50.567 INFO [stderr] 
Dec 19 10:52:50.567 INFO [stderr] warning: variable does not need to be mutable
Dec 19 10:52:50.567 INFO [stderr]    --> src/main.rs:110:9
Dec 19 10:52:50.567 INFO [stderr]     |
Dec 19 10:52:50.567 INFO [stderr] 110 |     let mut req = c.get(&url);
Dec 19 10:52:50.568 INFO [stderr]     |         ----^^^
Dec 19 10:52:50.568 INFO [stderr]     |         |
Dec 19 10:52:50.568 INFO [stderr]     |         help: remove this `mut`
Dec 19 10:52:50.568 INFO [stderr] 
Dec 19 10:52:50.568 INFO [stderr] warning: variable does not need to be mutable
Dec 19 10:52:50.568 INFO [stderr]    --> src/main.rs:111:9
Dec 19 10:52:50.568 INFO [stderr]     |
Dec 19 10:52:50.568 INFO [stderr] 111 |     let mut ret = match req.send() {
Dec 19 10:52:50.568 INFO [stderr]     |         ----^^^
Dec 19 10:52:50.568 INFO [stderr]     |         |
Dec 19 10:52:50.568 INFO [stderr]     |         help: remove this `mut`
Dec 19 10:52:50.568 INFO [stderr] 
Dec 19 10:52:50.568 INFO [stderr] warning: variable does not need to be mutable
Dec 19 10:52:50.568 INFO [stderr]    --> src/main.rs:142:9
Dec 19 10:52:50.568 INFO [stderr]     |
Dec 19 10:52:50.568 INFO [stderr] 142 |     let mut c = Client::new();
Dec 19 10:52:50.568 INFO [stderr]     |         ----^
Dec 19 10:52:50.568 INFO [stderr]     |         |
Dec 19 10:52:50.568 INFO [stderr]     |         help: remove this `mut`
Dec 19 10:52:50.568 INFO [stderr] 
Dec 19 10:52:50.572 INFO [stderr] warning: variable does not need to be mutable
Dec 19 10:52:50.572 INFO [stderr]    --> src/main.rs:143:9
Dec 19 10:52:50.572 INFO [stderr]     |
Dec 19 10:52:50.572 INFO [stderr] 143 |     let mut req = c.get(&url);
Dec 19 10:52:50.572 INFO [stderr]     |         ----^^^
Dec 19 10:52:50.572 INFO [stderr]     |         |
Dec 19 10:52:50.572 INFO [stderr]     |         help: remove this `mut`
Dec 19 10:52:50.572 INFO [stderr] 
Dec 19 10:52:50.572 INFO [stderr] warning: variable does not need to be mutable
Dec 19 10:52:50.572 INFO [stderr]    --> src/main.rs:144:9
Dec 19 10:52:50.572 INFO [stderr]     |
Dec 19 10:52:50.572 INFO [stderr] 144 |     let mut ret = match req.send() {
Dec 19 10:52:50.572 INFO [stderr]     |         ----^^^
Dec 19 10:52:50.572 INFO [stderr]     |         |
Dec 19 10:52:50.572 INFO [stderr]     |         help: remove this `mut`
Dec 19 10:52:50.572 INFO [stderr] 
Dec 19 10:52:50.572 INFO [stderr] warning: variable does not need to be mutable
Dec 19 10:52:50.572 INFO [stderr]    --> src/main.rs:137:38
Dec 19 10:52:50.572 INFO [stderr]     |
Dec 19 10:52:50.572 INFO [stderr] 137 | fn get_url_with_timeout_5(url: &str, mut shbuf: &Arc<Mutex<String>>) -> Result<u16, MyAppError> {
Dec 19 10:52:50.572 INFO [stderr]     |                                      ----^^^^^
Dec 19 10:52:50.572 INFO [stderr]     |                                      |
Dec 19 10:52:50.572 INFO [stderr]     |                                      help: remove this `mut`
Dec 19 10:52:50.572 INFO [stderr] 
Dec 19 10:52:50.577 INFO [stderr] warning: unused import: `Request`
Dec 19 10:52:50.577 INFO [stderr]  --> src/main.rs:9:21
Dec 19 10:52:50.577 INFO [stderr]   |
Dec 19 10:52:50.577 INFO [stderr] 9 | use hyper::client::{Request, Response};
Dec 19 10:52:50.577 INFO [stderr]   |                     ^^^^^^^
Dec 19 10:52:50.577 INFO [stderr]   |
Dec 19 10:52:50.577 INFO [stderr]   = note: #[warn(unused_imports)] on by default
Dec 19 10:52:50.577 INFO [stderr] 
Dec 19 10:52:50.707 INFO [stderr] warning: unused variable: `t`
Dec 19 10:52:50.707 INFO [stderr]   --> src/main.rs:27:7
Dec 19 10:52:50.707 INFO [stderr]    |
Dec 19 10:52:50.707 INFO [stderr] 27 |   let t = thread::spawn(move || {
Dec 19 10:52:50.707 INFO [stderr]    |       ^ help: consider using `_t` instead
Dec 19 10:52:50.707 INFO [stderr]    |
Dec 19 10:52:50.707 INFO [stderr]    = note: #[warn(unused_variables)] on by default
Dec 19 10:52:50.707 INFO [stderr] 
Dec 19 10:52:50.707 INFO [stderr] warning: unused variable: `t`
Dec 19 10:52:50.707 INFO [stderr]   --> src/main.rs:73:7
Dec 19 10:52:50.707 INFO [stderr]    |
Dec 19 10:52:50.707 INFO [stderr] 73 |   let t = thread::spawn(move || {
Dec 19 10:52:50.707 INFO [stderr]    |       ^ help: consider using `_t` instead
Dec 19 10:52:50.707 INFO [stderr] 
Dec 19 10:52:50.707 INFO [stderr] warning: unused variable: `t`
Dec 19 10:52:50.707 INFO [stderr]    --> src/main.rs:108:7
Dec 19 10:52:50.707 INFO [stderr]     |
Dec 19 10:52:50.707 INFO [stderr] 108 |   let t = thread::spawn(move || {
Dec 19 10:52:50.707 INFO [stderr]     |       ^ help: consider using `_t` instead
Dec 19 10:52:50.707 INFO [stderr] 
Dec 19 10:52:50.707 INFO [stderr] warning: unused variable: `t`
Dec 19 10:52:50.707 INFO [stderr]    --> src/main.rs:141:7
Dec 19 10:52:50.707 INFO [stderr]     |
Dec 19 10:52:50.707 INFO [stderr] 141 |   let t = thread::spawn(move || {
Dec 19 10:52:50.707 INFO [stderr]     |       ^ help: consider using `_t` instead
Dec 19 10:52:50.707 INFO [stderr] 
Dec 19 10:52:50.707 INFO [stderr] warning: unused variable: `status_code`
Dec 19 10:52:50.707 INFO [stderr]    --> src/main.rs:185:8
Dec 19 10:52:50.707 INFO [stderr]     |
Dec 19 10:52:50.707 INFO [stderr] 185 |   let (status_code, buf) = get_url_with_timeout_3("http://example.com/").unwrap();
Dec 19 10:52:50.707 INFO [stderr]     |        ^^^^^^^^^^^ help: consider using `_status_code` instead
Dec 19 10:52:50.707 INFO [stderr] 
Dec 19 10:52:50.708 INFO [stderr] warning: unused variable: `status_code`
Dec 19 10:52:50.708 INFO [stderr]    --> src/main.rs:188:8
Dec 19 10:52:50.708 INFO [stderr]     |
Dec 19 10:52:50.708 INFO [stderr] 188 |   let (status_code, buf) = get_url_with_timeout_4("http://example.com/").unwrap();
Dec 19 10:52:50.710 INFO [stderr]     |        ^^^^^^^^^^^ help: consider using `_status_code` instead
Dec 19 10:52:50.710 INFO [stderr] 
Dec 19 10:52:50.710 INFO [stderr] warning: unused variable: `status_code`
Dec 19 10:52:50.710 INFO [stderr]    --> src/main.rs:193:7
Dec 19 10:52:50.710 INFO [stderr]     |
Dec 19 10:52:50.710 INFO [stderr] 193 |   let status_code = get_url_with_timeout_5("http://example.com/", &shbuf).unwrap();
Dec 19 10:52:50.710 INFO [stderr]     |       ^^^^^^^^^^^ help: consider using `_status_code` instead
Dec 19 10:52:50.710 INFO [stderr] 
Dec 19 10:52:50.710 INFO [stderr] warning: variable does not need to be mutable
Dec 19 10:52:50.710 INFO [stderr]   --> src/main.rs:19:7
Dec 19 10:52:50.710 INFO [stderr]    |
Dec 19 10:52:50.710 INFO [stderr] 19 |   let mut c = Client::new();
Dec 19 10:52:50.710 INFO [stderr]    |       ----^
Dec 19 10:52:50.710 INFO [stderr]    |       |
Dec 19 10:52:50.711 INFO [stderr]    |       help: remove this `mut`
Dec 19 10:52:50.711 INFO [stderr]    |
Dec 19 10:52:50.711 INFO [stderr]    = note: #[warn(unused_mut)] on by default
Dec 19 10:52:50.711 INFO [stderr] 
Dec 19 10:52:50.711 INFO [stderr] warning: variable does not need to be mutable
Dec 19 10:52:50.711 INFO [stderr]   --> src/main.rs:20:7
Dec 19 10:52:50.711 INFO [stderr]    |
Dec 19 10:52:50.711 INFO [stderr] 20 |   let mut req = c.get(url);
Dec 19 10:52:50.711 INFO [stderr]    |       ----^^^
Dec 19 10:52:50.711 INFO [stderr]    |       |
Dec 19 10:52:50.711 INFO [stderr]    |       help: remove this `mut`
Dec 19 10:52:50.711 INFO [stderr] 
Dec 19 10:52:50.728 INFO [stderr] warning: variable does not need to be mutable
Dec 19 10:52:50.728 INFO [stderr]   --> src/main.rs:74:9
Dec 19 10:52:50.728 INFO [stderr]    |
Dec 19 10:52:50.728 INFO [stderr] 74 |     let mut c = Client::new();
Dec 19 10:52:50.728 INFO [stderr]    |         ----^
Dec 19 10:52:50.728 INFO [stderr]    |         |
Dec 19 10:52:50.728 INFO [stderr]    |         help: remove this `mut`
Dec 19 10:52:50.728 INFO [stderr] 
Dec 19 10:52:50.728 INFO [stderr] warning: variable does not need to be mutable
Dec 19 10:52:50.728 INFO [stderr]   --> src/main.rs:75:9
Dec 19 10:52:50.728 INFO [stderr]    |
Dec 19 10:52:50.728 INFO [stderr] 75 |     let mut req = c.get(&url);
Dec 19 10:52:50.728 INFO [stderr]    |         ----^^^
Dec 19 10:52:50.728 INFO [stderr]    |         |
Dec 19 10:52:50.728 INFO [stderr]    |         help: remove this `mut`
Dec 19 10:52:50.728 INFO [stderr] 
Dec 19 10:52:50.728 INFO [stderr] warning: variable does not need to be mutable
Dec 19 10:52:50.728 INFO [stderr]   --> src/main.rs:76:9
Dec 19 10:52:50.729 INFO [stderr]    |
Dec 19 10:52:50.729 INFO [stderr] 76 |     let mut ret = match req.send() {
Dec 19 10:52:50.729 INFO [stderr]    |         ----^^^
Dec 19 10:52:50.729 INFO [stderr]    |         |
Dec 19 10:52:50.729 INFO [stderr]    |         help: remove this `mut`
Dec 19 10:52:50.729 INFO [stderr] 
Dec 19 10:52:50.729 INFO [stderr] warning: variable does not need to be mutable
Dec 19 10:52:50.729 INFO [stderr]    --> src/main.rs:109:9
Dec 19 10:52:50.729 INFO [stderr]     |
Dec 19 10:52:50.729 INFO [stderr] 109 |     let mut c = Client::new();
Dec 19 10:52:50.729 INFO [stderr]     |         ----^
Dec 19 10:52:50.729 INFO [stderr]     |         |
Dec 19 10:52:50.729 INFO [stderr]     |         help: remove this `mut`
Dec 19 10:52:50.729 INFO [stderr] 
Dec 19 10:52:50.729 INFO [stderr] warning: variable does not need to be mutable
Dec 19 10:52:50.729 INFO [stderr]    --> src/main.rs:110:9
Dec 19 10:52:50.729 INFO [stderr]     |
Dec 19 10:52:50.729 INFO [stderr] 110 |     let mut req = c.get(&url);
Dec 19 10:52:50.729 INFO [stderr]     |         ----^^^
Dec 19 10:52:50.729 INFO [stderr]     |         |
Dec 19 10:52:50.729 INFO [stderr]     |         help: remove this `mut`
Dec 19 10:52:50.729 INFO [stderr] 
Dec 19 10:52:50.729 INFO [stderr] warning: variable does not need to be mutable
Dec 19 10:52:50.729 INFO [stderr]    --> src/main.rs:111:9
Dec 19 10:52:50.729 INFO [stderr]     |
Dec 19 10:52:50.729 INFO [stderr] 111 |     let mut ret = match req.send() {
Dec 19 10:52:50.729 INFO [stderr]     |         ----^^^
Dec 19 10:52:50.729 INFO [stderr]     |         |
Dec 19 10:52:50.729 INFO [stderr]     |         help: remove this `mut`
Dec 19 10:52:50.729 INFO [stderr] 
Dec 19 10:52:50.729 INFO [stderr] warning: variable does not need to be mutable
Dec 19 10:52:50.729 INFO [stderr]    --> src/main.rs:142:9
Dec 19 10:52:50.729 INFO [stderr]     |
Dec 19 10:52:50.729 INFO [stderr] 142 |     let mut c = Client::new();
Dec 19 10:52:50.729 INFO [stderr]     |         ----^
Dec 19 10:52:50.729 INFO [stderr]     |         |
Dec 19 10:52:50.729 INFO [stderr]     |         help: remove this `mut`
Dec 19 10:52:50.729 INFO [stderr] 
Dec 19 10:52:50.729 INFO [stderr] warning: variable does not need to be mutable
Dec 19 10:52:50.729 INFO [stderr]    --> src/main.rs:143:9
Dec 19 10:52:50.729 INFO [stderr]     |
Dec 19 10:52:50.729 INFO [stderr] 143 |     let mut req = c.get(&url);
Dec 19 10:52:50.729 INFO [stderr]     |         ----^^^
Dec 19 10:52:50.729 INFO [stderr]     |         |
Dec 19 10:52:50.729 INFO [stderr]     |         help: remove this `mut`
Dec 19 10:52:50.729 INFO [stderr] 
Dec 19 10:52:50.729 INFO [stderr] warning: variable does not need to be mutable
Dec 19 10:52:50.729 INFO [stderr]    --> src/main.rs:144:9
Dec 19 10:52:50.729 INFO [stderr]     |
Dec 19 10:52:50.729 INFO [stderr] 144 |     let mut ret = match req.send() {
Dec 19 10:52:50.729 INFO [stderr]     |         ----^^^
Dec 19 10:52:50.729 INFO [stderr]     |         |
Dec 19 10:52:50.729 INFO [stderr]     |         help: remove this `mut`
Dec 19 10:52:50.729 INFO [stderr] 
Dec 19 10:52:50.729 INFO [stderr] warning: variable does not need to be mutable
Dec 19 10:52:50.729 INFO [stderr]    --> src/main.rs:137:38
Dec 19 10:52:50.729 INFO [stderr]     |
Dec 19 10:52:50.729 INFO [stderr] 137 | fn get_url_with_timeout_5(url: &str, mut shbuf: &Arc<Mutex<String>>) -> Result<u16, MyAppError> {
Dec 19 10:52:50.729 INFO [stderr]     |                                      ----^^^^^
Dec 19 10:52:50.729 INFO [stderr]     |                                      |
Dec 19 10:52:50.729 INFO [stderr]     |                                      help: remove this `mut`
Dec 19 10:52:50.729 INFO [stderr] 
Dec 19 10:52:50.768 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 4.58s
Dec 19 10:52:51.524 INFO running `"docker" "inspect" "60529931be51b6fde91877d73b58791085efd3b91c093522f2e6320f97788745"`
Dec 19 10:52:51.764 INFO running `"docker" "rm" "-f" "60529931be51b6fde91877d73b58791085efd3b91c093522f2e6320f97788745"`
Dec 19 10:52:52.048 INFO [stdout] 60529931be51b6fde91877d73b58791085efd3b91c093522f2e6320f97788745