[INFO] updating cached repository silago/tcp-rs
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/silago/tcp-rs
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/silago/tcp-rs" "work/ex/pr-59199/sources/master#bc44841ad2a2ad5f6c5e67b9e35ed8e7e71d4dc7/gh/silago/tcp-rs"`
[INFO] [stderr] Cloning into 'work/ex/pr-59199/sources/master#bc44841ad2a2ad5f6c5e67b9e35ed8e7e71d4dc7/gh/silago/tcp-rs'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/silago/tcp-rs" "work/ex/pr-59199/sources/try#68fcf881bd1e4dbfc21e22f8c7a56b8a5d8e8f7b/gh/silago/tcp-rs"`
[INFO] [stderr] Cloning into 'work/ex/pr-59199/sources/try#68fcf881bd1e4dbfc21e22f8c7a56b8a5d8e8f7b/gh/silago/tcp-rs'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] b6310f52043790a9b53b2601502e0446fc8d0127
[INFO] sha for GitHub repo silago/tcp-rs: b6310f52043790a9b53b2601502e0446fc8d0127
[INFO] validating manifest of silago/tcp-rs on toolchain master#bc44841ad2a2ad5f6c5e67b9e35ed8e7e71d4dc7
[INFO] running `"/mnt/crater-raid/crater/work/local/cargo-home/bin/cargo" "+bc44841ad2a2ad5f6c5e67b9e35ed8e7e71d4dc7-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of silago/tcp-rs on toolchain try#68fcf881bd1e4dbfc21e22f8c7a56b8a5d8e8f7b
[INFO] running `"/mnt/crater-raid/crater/work/local/cargo-home/bin/cargo" "+68fcf881bd1e4dbfc21e22f8c7a56b8a5d8e8f7b-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing silago/tcp-rs
[INFO] finished frobbing silago/tcp-rs
[INFO] frobbed toml for silago/tcp-rs written to work/ex/pr-59199/sources/master#bc44841ad2a2ad5f6c5e67b9e35ed8e7e71d4dc7/gh/silago/tcp-rs/Cargo.toml
[INFO] started frobbing silago/tcp-rs
[INFO] finished frobbing silago/tcp-rs
[INFO] frobbed toml for silago/tcp-rs written to work/ex/pr-59199/sources/try#68fcf881bd1e4dbfc21e22f8c7a56b8a5d8e8f7b/gh/silago/tcp-rs/Cargo.toml
[INFO] crate silago/tcp-rs already has a lockfile, it will not be regenerated
[INFO] running `"/mnt/crater-raid/crater/work/local/cargo-home/bin/cargo" "+bc44841ad2a2ad5f6c5e67b9e35ed8e7e71d4dc7-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/crater-raid/crater/work/local/cargo-home/bin/cargo" "+68fcf881bd1e4dbfc21e22f8c7a56b8a5d8e8f7b-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] checking silago/tcp-rs against master#bc44841ad2a2ad5f6c5e67b9e35ed8e7e71d4dc7 for pr-59199
[INFO] running `"docker" "create" "-v" "/mnt/crater-raid/crater/work/local/target-dirs/pr-59199/worker-4/master#bc44841ad2a2ad5f6c5e67b9e35ed8e7e71d4dc7:/opt/crater/target:rw,Z" "-v" "/mnt/crater-raid/crater/work/ex/pr-59199/sources/master#bc44841ad2a2ad5f6c5e67b9e35ed8e7e71d4dc7/gh/silago/tcp-rs:/opt/crater/workdir:ro,Z" "-v" "/mnt/crater-raid/crater/work/local/cargo-home:/opt/crater/cargo-home:ro,Z" "-v" "/mnt/crater-raid/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" "+bc44841ad2a2ad5f6c5e67b9e35ed8e7e71d4dc7-alt" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stdout] f8dd21e3e204bba5244b5d3a06fc5fc94fe857214a9cd582a42cc3406cef0bd4
[INFO] running `"docker" "start" "-a" "f8dd21e3e204bba5244b5d3a06fc5fc94fe857214a9cd582a42cc3406cef0bd4"`
[INFO] [stderr]     Checking tcp-socker-example v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: unused import: `std::thread`
[INFO] [stderr]  --> main.rs:2:5
[INFO] [stderr]   |
[INFO] [stderr] 2 | use std::thread;
[INFO] [stderr]   |     ^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: #[warn(unused_imports)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::io::Result`
[INFO] [stderr]  --> main.rs:4:5
[INFO] [stderr]   |
[INFO] [stderr] 4 | use std::io::Result;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::str`
[INFO] [stderr]  --> main.rs:5:5
[INFO] [stderr]   |
[INFO] [stderr] 5 | use std::str;
[INFO] [stderr]   |     ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around `match` head expression
[INFO] [stderr]   --> main.rs:60:26
[INFO] [stderr]    |
[INFO] [stderr] 60 |                     match(x) {
[INFO] [stderr]    |                          ^^^ help: remove these parentheses
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(unused_parens)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around `match` head expression
[INFO] [stderr]   --> main.rs:69:26
[INFO] [stderr]    |
[INFO] [stderr] 69 |                     match(x) {
[INFO] [stderr]    |                          ^^^ help: remove these parentheses
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around `if` condition
[INFO] [stderr]   --> main.rs:73:32
[INFO] [stderr]    |
[INFO] [stderr] 73 |                             if (val!=msg.len()) {
[INFO] [stderr]    |                                ^^^^^^^^^^^^^^^^ help: remove these parentheses
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around `if` condition
[INFO] [stderr]   --> main.rs:82:24
[INFO] [stderr]    |
[INFO] [stderr] 82 |                     if (terminate) {
[INFO] [stderr]    |                        ^^^^^^^^^^^ help: remove these parentheses
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::thread`
[INFO] [stderr]  --> main.rs:2:5
[INFO] [stderr]   |
[INFO] [stderr] 2 | use std::thread;
[INFO] [stderr]   |     ^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: #[warn(unused_imports)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::io::Result`
[INFO] [stderr]  --> main.rs:4:5
[INFO] [stderr]   |
[INFO] [stderr] 4 | use std::io::Result;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::str`
[INFO] [stderr]  --> main.rs:5:5
[INFO] [stderr]   |
[INFO] [stderr] 5 | use std::str;
[INFO] [stderr]   |     ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around `match` head expression
[INFO] [stderr]   --> main.rs:60:26
[INFO] [stderr]    |
[INFO] [stderr] 60 |                     match(x) {
[INFO] [stderr]    |                          ^^^ help: remove these parentheses
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(unused_parens)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around `match` head expression
[INFO] [stderr]   --> main.rs:69:26
[INFO] [stderr]    |
[INFO] [stderr] 69 |                     match(x) {
[INFO] [stderr]    |                          ^^^ help: remove these parentheses
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around `if` condition
[INFO] [stderr]   --> main.rs:73:32
[INFO] [stderr]    |
[INFO] [stderr] 73 |                             if (val!=msg.len()) {
[INFO] [stderr]    |                                ^^^^^^^^^^^^^^^^ help: remove these parentheses
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around `if` condition
[INFO] [stderr]   --> main.rs:82:24
[INFO] [stderr]    |
[INFO] [stderr] 82 |                     if (terminate) {
[INFO] [stderr]    |                        ^^^^^^^^^^^ help: remove these parentheses
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `connections`
[INFO] [stderr]   --> main.rs:36:13
[INFO] [stderr]    |
[INFO] [stderr] 36 |     let mut connections: HashMap<i32, Chan> = HashMap::new();
[INFO] [stderr]    |             ^^^^^^^^^^^ help: consider prefixing with an underscore: `_connections`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(unused_variables)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `addr`
[INFO] [stderr]   --> main.rs:42:25
[INFO] [stderr]    |
[INFO] [stderr] 42 |             Ok((mut s , addr)) => {
[INFO] [stderr]    |                         ^^^^ help: consider prefixing with an underscore: `_addr`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `chan`
[INFO] [stderr]   --> main.rs:46:21
[INFO] [stderr]    |
[INFO] [stderr] 46 |                 let chan:Chan = Chan::fromTuple( 
[INFO] [stderr]    |                     ^^^^ help: consider prefixing with an underscore: `_chan`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `val`
[INFO] [stderr]   --> main.rs:61:30
[INFO] [stderr]    |
[INFO] [stderr] 61 |                         Some(val) => {
[INFO] [stderr]    |                              ^^^ help: consider prefixing with an underscore: `_val`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> main.rs:36:9
[INFO] [stderr]    |
[INFO] [stderr] 36 |     let mut connections: HashMap<i32, Chan> = HashMap::new();
[INFO] [stderr]    |         ----^^^^^^^^^^^
[INFO] [stderr]    |         |
[INFO] [stderr]    |         help: remove this `mut`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(unused_mut)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> main.rs:42:17
[INFO] [stderr]    |
[INFO] [stderr] 42 |             Ok((mut s , addr)) => {
[INFO] [stderr]    |                 ----^
[INFO] [stderr]    |                 |
[INFO] [stderr]    |                 help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: field is never used: `tx`
[INFO] [stderr]   --> main.rs:20:5
[INFO] [stderr]    |
[INFO] [stderr] 20 |     tx: Sender<String>,
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(dead_code)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: field is never used: `rx`
[INFO] [stderr]   --> main.rs:21:5
[INFO] [stderr]    |
[INFO] [stderr] 21 |     rx: Receiver<String>
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method `fromTuple` should have a snake case name
[INFO] [stderr]   --> main.rs:25:8
[INFO] [stderr]    |
[INFO] [stderr] 25 |     fn fromTuple(  input: ( Sender<String>, Receiver<String>) ) -> Chan {
[INFO] [stderr]    |        ^^^^^^^^^ help: convert the identifier to snake case: `from_tuple`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(non_snake_case)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `connections`
[INFO] [stderr]   --> main.rs:36:13
[INFO] [stderr]    |
[INFO] [stderr] 36 |     let mut connections: HashMap<i32, Chan> = HashMap::new();
[INFO] [stderr]    |             ^^^^^^^^^^^ help: consider prefixing with an underscore: `_connections`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(unused_variables)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `addr`
[INFO] [stderr]   --> main.rs:42:25
[INFO] [stderr]    |
[INFO] [stderr] 42 |             Ok((mut s , addr)) => {
[INFO] [stderr]    |                         ^^^^ help: consider prefixing with an underscore: `_addr`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `chan`
[INFO] [stderr]   --> main.rs:46:21
[INFO] [stderr]    |
[INFO] [stderr] 46 |                 let chan:Chan = Chan::fromTuple( 
[INFO] [stderr]    |                     ^^^^ help: consider prefixing with an underscore: `_chan`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `val`
[INFO] [stderr]   --> main.rs:61:30
[INFO] [stderr]    |
[INFO] [stderr] 61 |                         Some(val) => {
[INFO] [stderr]    |                              ^^^ help: consider prefixing with an underscore: `_val`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> main.rs:36:9
[INFO] [stderr]    |
[INFO] [stderr] 36 |     let mut connections: HashMap<i32, Chan> = HashMap::new();
[INFO] [stderr]    |         ----^^^^^^^^^^^
[INFO] [stderr]    |         |
[INFO] [stderr]    |         help: remove this `mut`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(unused_mut)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> main.rs:42:17
[INFO] [stderr]    |
[INFO] [stderr] 42 |             Ok((mut s , addr)) => {
[INFO] [stderr]    |                 ----^
[INFO] [stderr]    |                 |
[INFO] [stderr]    |                 help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: field is never used: `tx`
[INFO] [stderr]   --> main.rs:20:5
[INFO] [stderr]    |
[INFO] [stderr] 20 |     tx: Sender<String>,
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(dead_code)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: field is never used: `rx`
[INFO] [stderr]   --> main.rs:21:5
[INFO] [stderr]    |
[INFO] [stderr] 21 |     rx: Receiver<String>
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method `fromTuple` should have a snake case name
[INFO] [stderr]   --> main.rs:25:8
[INFO] [stderr]    |
[INFO] [stderr] 25 |     fn fromTuple(  input: ( Sender<String>, Receiver<String>) ) -> Chan {
[INFO] [stderr]    |        ^^^^^^^^^ help: convert the identifier to snake case: `from_tuple`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(non_snake_case)] on by default
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.48s
[INFO] running `"docker" "inspect" "f8dd21e3e204bba5244b5d3a06fc5fc94fe857214a9cd582a42cc3406cef0bd4"`
[INFO] running `"docker" "rm" "-f" "f8dd21e3e204bba5244b5d3a06fc5fc94fe857214a9cd582a42cc3406cef0bd4"`
[INFO] [stdout] f8dd21e3e204bba5244b5d3a06fc5fc94fe857214a9cd582a42cc3406cef0bd4