Dec 04 23:56:37.304 INFO checking Takamichi-tsutsumi/pong against try#1df97983eb2057dc6a8f7eb364e263b51ae23230 for pr-56481
Dec 04 23:56:37.304 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-56481/worker-4/try#1df97983eb2057dc6a8f7eb364e263b51ae23230:/target:rw,Z" "-v" "/mnt/big/crater/work/local/test-source/worker-4/pr-56481/try#1df97983eb2057dc6a8f7eb364e263b51ae23230:/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 +1df97983eb2057dc6a8f7eb364e263b51ae23230-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 23:56:37.608 INFO [stdout] 9ac8eb0f4990489b5d588319ee02a40b486e065fb212f72249bf77a8ab9d214d
Dec 04 23:56:37.610 INFO running `"docker" "start" "-a" "9ac8eb0f4990489b5d588319ee02a40b486e065fb212f72249bf77a8ab9d214d"`
Dec 04 23:56:38.391 INFO [stderr] usermod: no changes
Dec 04 23:56:38.491 INFO [stderr]     Checking pong v0.1.0 (/source)
Dec 04 23:56:40.027 INFO [stderr] warning: unused variable: `rx`
Dec 04 23:56:40.027 INFO [stderr]   --> src/main.rs:25:14
Dec 04 23:56:40.027 INFO [stderr]    |
Dec 04 23:56:40.027 INFO [stderr] 25 |     let (tx, rx) = channel();
Dec 04 23:56:40.027 INFO [stderr]    |              ^^ help: consider using `_rx` instead
Dec 04 23:56:40.027 INFO [stderr]    |
Dec 04 23:56:40.027 INFO [stderr]    = note: #[warn(unused_variables)] on by default
Dec 04 23:56:40.027 INFO [stderr] 
Dec 04 23:56:40.027 INFO [stderr] warning: unused variable: `req`
Dec 04 23:56:40.027 INFO [stderr]   --> src/main.rs:13:22
Dec 04 23:56:40.027 INFO [stderr]    |
Dec 04 23:56:40.027 INFO [stderr] 13 |     fn handle(&self, req: Request, mut res: Response) {
Dec 04 23:56:40.027 INFO [stderr]    |                      ^^^ help: consider using `_req` instead
Dec 04 23:56:40.027 INFO [stderr] 
Dec 04 23:56:40.040 INFO [stderr] warning: variable does not need to be mutable
Dec 04 23:56:40.040 INFO [stderr]   --> src/main.rs:13:36
Dec 04 23:56:40.040 INFO [stderr]    |
Dec 04 23:56:40.040 INFO [stderr] 13 |     fn handle(&self, req: Request, mut res: Response) {
Dec 04 23:56:40.040 INFO [stderr]    |                                    ----^^^
Dec 04 23:56:40.040 INFO [stderr]    |                                    |
Dec 04 23:56:40.040 INFO [stderr]    |                                    help: remove this `mut`
Dec 04 23:56:40.040 INFO [stderr]    |
Dec 04 23:56:40.040 INFO [stderr]    = note: #[warn(unused_mut)] on by default
Dec 04 23:56:40.040 INFO [stderr] 
Dec 04 23:56:40.073 INFO [stderr] warning: unused variable: `rx`
Dec 04 23:56:40.074 INFO [stderr]   --> src/main.rs:25:14
Dec 04 23:56:40.074 INFO [stderr]    |
Dec 04 23:56:40.074 INFO [stderr] 25 |     let (tx, rx) = channel();
Dec 04 23:56:40.074 INFO [stderr]    |              ^^ help: consider using `_rx` instead
Dec 04 23:56:40.075 INFO [stderr]    |
Dec 04 23:56:40.075 INFO [stderr]    = note: #[warn(unused_variables)] on by default
Dec 04 23:56:40.075 INFO [stderr] 
Dec 04 23:56:40.075 INFO [stderr] warning: unused variable: `req`
Dec 04 23:56:40.076 INFO [stderr]   --> src/main.rs:13:22
Dec 04 23:56:40.076 INFO [stderr]    |
Dec 04 23:56:40.076 INFO [stderr] 13 |     fn handle(&self, req: Request, mut res: Response) {
Dec 04 23:56:40.077 INFO [stderr]    |                      ^^^ help: consider using `_req` instead
Dec 04 23:56:40.077 INFO [stderr] 
Dec 04 23:56:40.086 INFO [stderr] warning: variable does not need to be mutable
Dec 04 23:56:40.086 INFO [stderr]   --> src/main.rs:13:36
Dec 04 23:56:40.087 INFO [stderr]    |
Dec 04 23:56:40.087 INFO [stderr] 13 |     fn handle(&self, req: Request, mut res: Response) {
Dec 04 23:56:40.087 INFO [stderr]    |                                    ----^^^
Dec 04 23:56:40.087 INFO [stderr]    |                                    |
Dec 04 23:56:40.088 INFO [stderr]    |                                    help: remove this `mut`
Dec 04 23:56:40.088 INFO [stderr]    |
Dec 04 23:56:40.088 INFO [stderr]    = note: #[warn(unused_mut)] on by default
Dec 04 23:56:40.088 INFO [stderr] 
Dec 04 23:56:40.100 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.68s
Dec 04 23:56:40.104 INFO [stderr] su: No module specific data is present
Dec 04 23:56:42.094 INFO running `"docker" "inspect" "9ac8eb0f4990489b5d588319ee02a40b486e065fb212f72249bf77a8ab9d214d"`
Dec 04 23:56:42.241 INFO running `"docker" "rm" "-f" "9ac8eb0f4990489b5d588319ee02a40b486e065fb212f72249bf77a8ab9d214d"`
Dec 04 23:56:42.872 INFO [stdout] 9ac8eb0f4990489b5d588319ee02a40b486e065fb212f72249bf77a8ab9d214d