Dec 18 01:47:03.937 INFO checking daogangtang/learn-tokio against master#96d1334e567237b1507cd277938e7ae2de75ff51 for pr-54252
Dec 18 01:47:03.937 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-54252/worker-3/master#96d1334e567237b1507cd277938e7ae2de75ff51:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-54252/sources/master#96d1334e567237b1507cd277938e7ae2de75ff51/gh/daogangtang/learn-tokio:/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" "+96d1334e567237b1507cd277938e7ae2de75ff51-alt" "check" "--frozen" "--all" "--all-targets"`
Dec 18 01:47:04.384 INFO [stdout] 59308826969bd485332c92860ebedc631976a32774501d2fa2d6e9cb0eb2f045
Dec 18 01:47:04.388 INFO running `"docker" "start" "-a" "59308826969bd485332c92860ebedc631976a32774501d2fa2d6e9cb0eb2f045"`
Dec 18 01:47:05.676 INFO [stderr]     Checking learn-tokio0 v0.1.0 (/opt/crater/workdir)
Dec 18 01:47:07.084 INFO [stderr] warning: unused import: `futures::try_ready`
Dec 18 01:47:07.084 INFO [stderr]  --> src/concurrent_send_recv.rs:7:5
Dec 18 01:47:07.084 INFO [stderr]   |
Dec 18 01:47:07.084 INFO [stderr] 7 | use futures::try_ready;
Dec 18 01:47:07.084 INFO [stderr]   |     ^^^^^^^^^^^^^^^^^^
Dec 18 01:47:07.084 INFO [stderr]   |
Dec 18 01:47:07.084 INFO [stderr]   = note: #[warn(unused_imports)] on by default
Dec 18 01:47:07.084 INFO [stderr] 
Dec 18 01:47:07.120 INFO [stderr] warning: unused import: `tokio::io`
Dec 18 01:47:07.120 INFO [stderr]  --> src/tcp_server.rs:5:5
Dec 18 01:47:07.120 INFO [stderr]   |
Dec 18 01:47:07.120 INFO [stderr] 5 | use tokio::io;
Dec 18 01:47:07.120 INFO [stderr]   |     ^^^^^^^^^
Dec 18 01:47:07.120 INFO [stderr]   |
Dec 18 01:47:07.120 INFO [stderr]   = note: #[warn(unused_imports)] on by default
Dec 18 01:47:07.120 INFO [stderr] 
Dec 18 01:47:07.176 INFO [stderr] warning: unused variable: `e`
Dec 18 01:47:07.176 INFO [stderr]   --> src/tcp_server3.rs:29:31
Dec 18 01:47:07.176 INFO [stderr]    |
Dec 18 01:47:07.176 INFO [stderr] 29 |                     .map_err(|e| std::io::Error::new(std::io::ErrorKind::Other, "oh no!"))
Dec 18 01:47:07.176 INFO [stderr]    |                               ^ help: consider using `_e` instead
Dec 18 01:47:07.176 INFO [stderr]    |
Dec 18 01:47:07.176 INFO [stderr]    = note: #[warn(unused_variables)] on by default
Dec 18 01:47:07.176 INFO [stderr] 
Dec 18 01:47:07.282 INFO [stderr] warning: unused import: `tokio::prelude`
Dec 18 01:47:07.282 INFO [stderr]  --> src/tcp_server.rs:7:5
Dec 18 01:47:07.282 INFO [stderr]   |
Dec 18 01:47:07.282 INFO [stderr] 7 | use tokio::prelude::*;
Dec 18 01:47:07.282 INFO [stderr]   |     ^^^^^^^^^^^^^^
Dec 18 01:47:07.282 INFO [stderr] 
Dec 18 01:47:07.284 INFO [stderr] warning: unused variable: `e`
Dec 18 01:47:07.284 INFO [stderr]   --> src/tcp_server.rs:37:31
Dec 18 01:47:07.284 INFO [stderr]    |
Dec 18 01:47:07.284 INFO [stderr] 37 |                     .map_err(|e| std::io::Error::new(std::io::ErrorKind::Other, "oh no!"))
Dec 18 01:47:07.284 INFO [stderr]    |                               ^ help: consider using `_e` instead
Dec 18 01:47:07.284 INFO [stderr]    |
Dec 18 01:47:07.284 INFO [stderr]    = note: #[warn(unused_variables)] on by default
Dec 18 01:47:07.284 INFO [stderr] 
Dec 18 01:47:08.692 INFO [stderr] warning: unused import: `futures::try_ready`
Dec 18 01:47:08.692 INFO [stderr]  --> src/concurrent_send_recv2.rs:7:5
Dec 18 01:47:08.692 INFO [stderr]   |
Dec 18 01:47:08.692 INFO [stderr] 7 | use futures::try_ready;
Dec 18 01:47:08.693 INFO [stderr]   |     ^^^^^^^^^^^^^^^^^^
Dec 18 01:47:08.696 INFO [stderr]   |
Dec 18 01:47:08.696 INFO [stderr]   = note: #[warn(unused_imports)] on by default
Dec 18 01:47:08.696 INFO [stderr] 
Dec 18 01:47:09.776 INFO [stderr] warning: unused import: `tokio::io`
Dec 18 01:47:09.776 INFO [stderr]  --> src/tcp_server.rs:5:5
Dec 18 01:47:09.776 INFO [stderr]   |
Dec 18 01:47:09.776 INFO [stderr] 5 | use tokio::io;
Dec 18 01:47:09.777 INFO [stderr]   |     ^^^^^^^^^
Dec 18 01:47:09.777 INFO [stderr]   |
Dec 18 01:47:09.777 INFO [stderr]   = note: #[warn(unused_imports)] on by default
Dec 18 01:47:09.777 INFO [stderr] 
Dec 18 01:47:10.206 INFO [stderr] warning: unused import: `tokio::prelude`
Dec 18 01:47:10.206 INFO [stderr]  --> src/tcp_server.rs:7:5
Dec 18 01:47:10.207 INFO [stderr]   |
Dec 18 01:47:10.207 INFO [stderr] 7 | use tokio::prelude::*;
Dec 18 01:47:10.207 INFO [stderr]   |     ^^^^^^^^^^^^^^
Dec 18 01:47:10.207 INFO [stderr] 
Dec 18 01:47:10.216 INFO [stderr] warning: unused variable: `e`
Dec 18 01:47:10.216 INFO [stderr]   --> src/tcp_server.rs:37:31
Dec 18 01:47:10.217 INFO [stderr]    |
Dec 18 01:47:10.217 INFO [stderr] 37 |                     .map_err(|e| std::io::Error::new(std::io::ErrorKind::Other, "oh no!"))
Dec 18 01:47:10.217 INFO [stderr]    |                               ^ help: consider using `_e` instead
Dec 18 01:47:10.218 INFO [stderr]    |
Dec 18 01:47:10.218 INFO [stderr]    = note: #[warn(unused_variables)] on by default
Dec 18 01:47:10.220 INFO [stderr] 
Dec 18 01:47:10.460 INFO [stderr] warning: unused import: `futures::try_ready`
Dec 18 01:47:10.460 INFO [stderr]  --> src/concurrent_send_recv2.rs:7:5
Dec 18 01:47:10.460 INFO [stderr]   |
Dec 18 01:47:10.460 INFO [stderr] 7 | use futures::try_ready;
Dec 18 01:47:10.460 INFO [stderr]   |     ^^^^^^^^^^^^^^^^^^
Dec 18 01:47:10.460 INFO [stderr]   |
Dec 18 01:47:10.461 INFO [stderr]   = note: #[warn(unused_imports)] on by default
Dec 18 01:47:10.464 INFO [stderr] 
Dec 18 01:47:10.748 INFO [stderr] warning: unused variable: `stdout`
Dec 18 01:47:10.748 INFO [stderr]   --> src/tcp_client.rs:12:13
Dec 18 01:47:10.748 INFO [stderr]    |
Dec 18 01:47:10.748 INFO [stderr] 12 |     let mut stdout = io::stdout();
Dec 18 01:47:10.748 INFO [stderr]    |             ^^^^^^ help: consider using `_stdout` instead
Dec 18 01:47:10.748 INFO [stderr]    |
Dec 18 01:47:10.748 INFO [stderr]    = note: #[warn(unused_variables)] on by default
Dec 18 01:47:10.748 INFO [stderr] 
Dec 18 01:47:10.784 INFO [stderr] warning: variable does not need to be mutable
Dec 18 01:47:10.784 INFO [stderr]   --> src/tcp_client.rs:12:9
Dec 18 01:47:10.784 INFO [stderr]    |
Dec 18 01:47:10.784 INFO [stderr] 12 |     let mut stdout = io::stdout();
Dec 18 01:47:10.784 INFO [stderr]    |         ----^^^^^^
Dec 18 01:47:10.784 INFO [stderr]    |         |
Dec 18 01:47:10.784 INFO [stderr]    |         help: remove this `mut`
Dec 18 01:47:10.784 INFO [stderr]    |
Dec 18 01:47:10.784 INFO [stderr]    = note: #[warn(unused_mut)] on by default
Dec 18 01:47:10.784 INFO [stderr] 
Dec 18 01:47:12.948 INFO [stderr] warning: unused import: `futures::try_ready`
Dec 18 01:47:12.948 INFO [stderr]  --> src/concurrent_send_recv.rs:7:5
Dec 18 01:47:12.948 INFO [stderr]   |
Dec 18 01:47:12.948 INFO [stderr] 7 | use futures::try_ready;
Dec 18 01:47:12.949 INFO [stderr]   |     ^^^^^^^^^^^^^^^^^^
Dec 18 01:47:12.949 INFO [stderr]   |
Dec 18 01:47:12.949 INFO [stderr]   = note: #[warn(unused_imports)] on by default
Dec 18 01:47:12.949 INFO [stderr] 
Dec 18 01:47:13.644 INFO [stderr] warning: unused variable: `stdout`
Dec 18 01:47:13.645 INFO [stderr]   --> src/tcp_client.rs:12:13
Dec 18 01:47:13.645 INFO [stderr]    |
Dec 18 01:47:13.645 INFO [stderr] 12 |     let mut stdout = io::stdout();
Dec 18 01:47:13.646 INFO [stderr]    |             ^^^^^^ help: consider using `_stdout` instead
Dec 18 01:47:13.646 INFO [stderr]    |
Dec 18 01:47:13.646 INFO [stderr]    = note: #[warn(unused_variables)] on by default
Dec 18 01:47:13.646 INFO [stderr] 
Dec 18 01:47:13.804 INFO [stderr] warning: variable does not need to be mutable
Dec 18 01:47:13.804 INFO [stderr]   --> src/tcp_client.rs:12:9
Dec 18 01:47:13.804 INFO [stderr]    |
Dec 18 01:47:13.804 INFO [stderr] 12 |     let mut stdout = io::stdout();
Dec 18 01:47:13.805 INFO [stderr]    |         ----^^^^^^
Dec 18 01:47:13.805 INFO [stderr]    |         |
Dec 18 01:47:13.805 INFO [stderr]    |         help: remove this `mut`
Dec 18 01:47:13.805 INFO [stderr]    |
Dec 18 01:47:13.805 INFO [stderr]    = note: #[warn(unused_mut)] on by default
Dec 18 01:47:13.805 INFO [stderr] 
Dec 18 01:47:14.666 INFO [stderr] warning: unused variable: `e`
Dec 18 01:47:14.666 INFO [stderr]   --> src/tcp_server3.rs:29:31
Dec 18 01:47:14.666 INFO [stderr]    |
Dec 18 01:47:14.666 INFO [stderr] 29 |                     .map_err(|e| std::io::Error::new(std::io::ErrorKind::Other, "oh no!"))
Dec 18 01:47:14.666 INFO [stderr]    |                               ^ help: consider using `_e` instead
Dec 18 01:47:14.666 INFO [stderr]    |
Dec 18 01:47:14.666 INFO [stderr]    = note: #[warn(unused_variables)] on by default
Dec 18 01:47:14.666 INFO [stderr] 
Dec 18 01:47:15.136 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 9.60s
Dec 18 01:47:15.666 INFO running `"docker" "inspect" "59308826969bd485332c92860ebedc631976a32774501d2fa2d6e9cb0eb2f045"`
Dec 18 01:47:15.928 INFO running `"docker" "rm" "-f" "59308826969bd485332c92860ebedc631976a32774501d2fa2d6e9cb0eb2f045"`
Dec 18 01:47:16.192 INFO [stdout] 59308826969bd485332c92860ebedc631976a32774501d2fa2d6e9cb0eb2f045