Dec 04 20:14:51.820 INFO checking daogangtang/learn-tokio against try#1df97983eb2057dc6a8f7eb364e263b51ae23230 for pr-56481
Dec 04 20:14:51.820 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-56481/worker-5/try#1df97983eb2057dc6a8f7eb364e263b51ae23230:/target:rw,Z" "-v" "/mnt/big/crater/work/local/test-source/worker-5/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 20:14:52.131 INFO [stdout] 9cd5709088a7f8b3c422a1d7b906582e49836f2a592a30ce5be68ffb30926102
Dec 04 20:14:52.133 INFO running `"docker" "start" "-a" "9cd5709088a7f8b3c422a1d7b906582e49836f2a592a30ce5be68ffb30926102"`
Dec 04 20:14:52.969 INFO [stderr] usermod: no changes
Dec 04 20:14:53.139 INFO [stderr]     Checking learn-tokio0 v0.1.0 (/source)
Dec 04 20:14:59.369 INFO [stderr] warning: unused import: `futures::try_ready`
Dec 04 20:14:59.369 INFO [stderr]  --> src/concurrent_send_recv2.rs:7:5
Dec 04 20:14:59.369 INFO [stderr]   |
Dec 04 20:14:59.369 INFO [stderr] 7 | use futures::try_ready;
Dec 04 20:14:59.369 INFO [stderr]   |     ^^^^^^^^^^^^^^^^^^
Dec 04 20:14:59.369 INFO [stderr]   |
Dec 04 20:14:59.369 INFO [stderr]   = note: #[warn(unused_imports)] on by default
Dec 04 20:14:59.369 INFO [stderr] 
Dec 04 20:14:59.371 INFO [stderr] warning: unused import: `tokio::io`
Dec 04 20:14:59.371 INFO [stderr]  --> src/tcp_server.rs:5:5
Dec 04 20:14:59.371 INFO [stderr]   |
Dec 04 20:14:59.371 INFO [stderr] 5 | use tokio::io;
Dec 04 20:14:59.371 INFO [stderr]   |     ^^^^^^^^^
Dec 04 20:14:59.387 INFO [stderr]   |
Dec 04 20:14:59.387 INFO [stderr]   = note: #[warn(unused_imports)] on by default
Dec 04 20:14:59.387 INFO [stderr] 
Dec 04 20:14:59.772 INFO [stderr] warning: unused import: `tokio::prelude`
Dec 04 20:14:59.773 INFO [stderr]  --> src/tcp_server.rs:7:5
Dec 04 20:14:59.773 INFO [stderr]   |
Dec 04 20:14:59.773 INFO [stderr] 7 | use tokio::prelude::*;
Dec 04 20:14:59.773 INFO [stderr]   |     ^^^^^^^^^^^^^^
Dec 04 20:14:59.773 INFO [stderr] 
Dec 04 20:14:59.775 INFO [stderr] warning: unused variable: `e`
Dec 04 20:14:59.775 INFO [stderr]   --> src/tcp_server.rs:37:31
Dec 04 20:14:59.775 INFO [stderr]    |
Dec 04 20:14:59.783 INFO [stderr] 37 |                     .map_err(|e| std::io::Error::new(std::io::ErrorKind::Other, "oh no!"))
Dec 04 20:14:59.783 INFO [stderr]    |                               ^ help: consider using `_e` instead
Dec 04 20:14:59.783 INFO [stderr]    |
Dec 04 20:14:59.783 INFO [stderr]    = note: #[warn(unused_variables)] on by default
Dec 04 20:14:59.783 INFO [stderr] 
Dec 04 20:15:00.405 INFO [stderr] warning: unused import: `futures::try_ready`
Dec 04 20:15:00.405 INFO [stderr]  --> src/concurrent_send_recv.rs:7:5
Dec 04 20:15:00.405 INFO [stderr]   |
Dec 04 20:15:00.405 INFO [stderr] 7 | use futures::try_ready;
Dec 04 20:15:00.405 INFO [stderr]   |     ^^^^^^^^^^^^^^^^^^
Dec 04 20:15:00.427 INFO [stderr]   |
Dec 04 20:15:00.427 INFO [stderr]   = note: #[warn(unused_imports)] on by default
Dec 04 20:15:00.427 INFO [stderr] 
Dec 04 20:15:00.491 INFO [stderr] warning: unused import: `tokio::io`
Dec 04 20:15:00.491 INFO [stderr]  --> src/tcp_server.rs:5:5
Dec 04 20:15:00.491 INFO [stderr]   |
Dec 04 20:15:00.491 INFO [stderr] 5 | use tokio::io;
Dec 04 20:15:00.491 INFO [stderr]   |     ^^^^^^^^^
Dec 04 20:15:00.491 INFO [stderr]   |
Dec 04 20:15:00.491 INFO [stderr]   = note: #[warn(unused_imports)] on by default
Dec 04 20:15:00.491 INFO [stderr] 
Dec 04 20:15:00.926 INFO [stderr] warning: unused import: `tokio::prelude`
Dec 04 20:15:00.926 INFO [stderr]  --> src/tcp_server.rs:7:5
Dec 04 20:15:00.926 INFO [stderr]   |
Dec 04 20:15:00.926 INFO [stderr] 7 | use tokio::prelude::*;
Dec 04 20:15:00.926 INFO [stderr]   |     ^^^^^^^^^^^^^^
Dec 04 20:15:00.942 INFO [stderr] 
Dec 04 20:15:00.948 INFO [stderr] warning: unused variable: `e`
Dec 04 20:15:00.948 INFO [stderr]   --> src/tcp_server.rs:37:31
Dec 04 20:15:00.948 INFO [stderr]    |
Dec 04 20:15:00.948 INFO [stderr] 37 |                     .map_err(|e| std::io::Error::new(std::io::ErrorKind::Other, "oh no!"))
Dec 04 20:15:00.948 INFO [stderr]    |                               ^ help: consider using `_e` instead
Dec 04 20:15:00.973 INFO [stderr]    |
Dec 04 20:15:00.973 INFO [stderr]    = note: #[warn(unused_variables)] on by default
Dec 04 20:15:00.973 INFO [stderr] 
Dec 04 20:15:04.163 INFO [stderr] warning: unused variable: `e`
Dec 04 20:15:04.163 INFO [stderr]   --> src/tcp_server3.rs:29:31
Dec 04 20:15:04.163 INFO [stderr]    |
Dec 04 20:15:04.164 INFO [stderr] 29 |                     .map_err(|e| std::io::Error::new(std::io::ErrorKind::Other, "oh no!"))
Dec 04 20:15:04.164 INFO [stderr]    |                               ^ help: consider using `_e` instead
Dec 04 20:15:04.164 INFO [stderr]    |
Dec 04 20:15:04.164 INFO [stderr]    = note: #[warn(unused_variables)] on by default
Dec 04 20:15:04.164 INFO [stderr] 
Dec 04 20:15:12.291 INFO [stderr] warning: unused import: `futures::try_ready`
Dec 04 20:15:12.291 INFO [stderr]  --> src/concurrent_send_recv.rs:7:5
Dec 04 20:15:12.292 INFO [stderr]   |
Dec 04 20:15:12.292 INFO [stderr] 7 | use futures::try_ready;
Dec 04 20:15:12.292 INFO [stderr]   |     ^^^^^^^^^^^^^^^^^^
Dec 04 20:15:12.292 INFO [stderr]   |
Dec 04 20:15:12.292 INFO [stderr]   = note: #[warn(unused_imports)] on by default
Dec 04 20:15:12.292 INFO [stderr] 
Dec 04 20:15:14.001 INFO [stderr] warning: unused variable: `stdout`
Dec 04 20:15:14.001 INFO [stderr]   --> src/tcp_client.rs:12:13
Dec 04 20:15:14.002 INFO [stderr]    |
Dec 04 20:15:14.002 INFO [stderr] 12 |     let mut stdout = io::stdout();
Dec 04 20:15:14.002 INFO [stderr]    |             ^^^^^^ help: consider using `_stdout` instead
Dec 04 20:15:14.002 INFO [stderr]    |
Dec 04 20:15:14.003 INFO [stderr]    = note: #[warn(unused_variables)] on by default
Dec 04 20:15:14.003 INFO [stderr] 
Dec 04 20:15:14.091 INFO [stderr] warning: variable does not need to be mutable
Dec 04 20:15:14.091 INFO [stderr]   --> src/tcp_client.rs:12:9
Dec 04 20:15:14.091 INFO [stderr]    |
Dec 04 20:15:14.092 INFO [stderr] 12 |     let mut stdout = io::stdout();
Dec 04 20:15:14.092 INFO [stderr]    |         ----^^^^^^
Dec 04 20:15:14.092 INFO [stderr]    |         |
Dec 04 20:15:14.092 INFO [stderr]    |         help: remove this `mut`
Dec 04 20:15:14.119 INFO [stderr]    |
Dec 04 20:15:14.119 INFO [stderr]    = note: #[warn(unused_mut)] on by default
Dec 04 20:15:14.119 INFO [stderr] 
Dec 04 20:15:24.963 INFO [stderr] warning: unused import: `futures::try_ready`
Dec 04 20:15:24.963 INFO [stderr]  --> src/concurrent_send_recv2.rs:7:5
Dec 04 20:15:24.963 INFO [stderr]   |
Dec 04 20:15:24.963 INFO [stderr] 7 | use futures::try_ready;
Dec 04 20:15:24.963 INFO [stderr]   |     ^^^^^^^^^^^^^^^^^^
Dec 04 20:15:24.963 INFO [stderr]   |
Dec 04 20:15:24.963 INFO [stderr]   = note: #[warn(unused_imports)] on by default
Dec 04 20:15:24.963 INFO [stderr] 
Dec 04 20:15:25.287 INFO [stderr] warning: unused variable: `e`
Dec 04 20:15:25.287 INFO [stderr]   --> src/tcp_server3.rs:29:31
Dec 04 20:15:25.287 INFO [stderr]    |
Dec 04 20:15:25.287 INFO [stderr] 29 |                     .map_err(|e| std::io::Error::new(std::io::ErrorKind::Other, "oh no!"))
Dec 04 20:15:25.287 INFO [stderr]    |                               ^ help: consider using `_e` instead
Dec 04 20:15:25.303 INFO [stderr]    |
Dec 04 20:15:25.303 INFO [stderr]    = note: #[warn(unused_variables)] on by default
Dec 04 20:15:25.303 INFO [stderr] 
Dec 04 20:15:26.125 INFO [stderr] warning: unused variable: `stdout`
Dec 04 20:15:26.125 INFO [stderr]   --> src/tcp_client.rs:12:13
Dec 04 20:15:26.125 INFO [stderr]    |
Dec 04 20:15:26.125 INFO [stderr] 12 |     let mut stdout = io::stdout();
Dec 04 20:15:26.125 INFO [stderr]    |             ^^^^^^ help: consider using `_stdout` instead
Dec 04 20:15:26.125 INFO [stderr]    |
Dec 04 20:15:26.125 INFO [stderr]    = note: #[warn(unused_variables)] on by default
Dec 04 20:15:26.125 INFO [stderr] 
Dec 04 20:15:26.144 INFO [stderr] warning: variable does not need to be mutable
Dec 04 20:15:26.144 INFO [stderr]   --> src/tcp_client.rs:12:9
Dec 04 20:15:26.144 INFO [stderr]    |
Dec 04 20:15:26.144 INFO [stderr] 12 |     let mut stdout = io::stdout();
Dec 04 20:15:26.144 INFO [stderr]    |         ----^^^^^^
Dec 04 20:15:26.144 INFO [stderr]    |         |
Dec 04 20:15:26.144 INFO [stderr]    |         help: remove this `mut`
Dec 04 20:15:26.144 INFO [stderr]    |
Dec 04 20:15:26.146 INFO [stderr]    = note: #[warn(unused_mut)] on by default
Dec 04 20:15:26.148 INFO [stderr] 
Dec 04 20:15:26.279 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 33.29s
Dec 04 20:15:26.286 INFO [stderr] su: No module specific data is present
Dec 04 20:15:27.031 INFO running `"docker" "inspect" "9cd5709088a7f8b3c422a1d7b906582e49836f2a592a30ce5be68ffb30926102"`
Dec 04 20:15:27.363 INFO running `"docker" "rm" "-f" "9cd5709088a7f8b3c422a1d7b906582e49836f2a592a30ce5be68ffb30926102"`
Dec 04 20:15:27.719 INFO [stdout] 9cd5709088a7f8b3c422a1d7b906582e49836f2a592a30ce5be68ffb30926102