Dec 04 20:15:10.644 INFO checking daogangtang/learn-tokio against master#c8ae2de8363be088604ffa2ccba84ff7ad7250bc for pr-56481
Dec 04 20:15:10.644 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-56481/worker-1/master#c8ae2de8363be088604ffa2ccba84ff7ad7250bc:/target:rw,Z" "-v" "/mnt/big/crater/work/local/test-source/worker-1/pr-56481/master#c8ae2de8363be088604ffa2ccba84ff7ad7250bc:/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 +c8ae2de8363be088604ffa2ccba84ff7ad7250bc-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 20:15:11.058 INFO [stdout] c0b66a18d13fc9adb118d743c0ef2b826fbb96396e33ab710ddd62f719535139
Dec 04 20:15:11.060 INFO running `"docker" "start" "-a" "c0b66a18d13fc9adb118d743c0ef2b826fbb96396e33ab710ddd62f719535139"`
Dec 04 20:15:12.781 INFO [stderr] usermod: no changes
Dec 04 20:15:14.013 INFO [stderr]     Checking learn-tokio0 v0.1.0 (/source)
Dec 04 20:15:24.205 INFO [stderr] warning: unused import: `futures::try_ready`
Dec 04 20:15:24.205 INFO [stderr]  --> src/concurrent_send_recv2.rs:7:5
Dec 04 20:15:24.205 INFO [stderr]   |
Dec 04 20:15:24.205 INFO [stderr] 7 | use futures::try_ready;
Dec 04 20:15:24.205 INFO [stderr]   |     ^^^^^^^^^^^^^^^^^^
Dec 04 20:15:24.219 INFO [stderr]   |
Dec 04 20:15:24.219 INFO [stderr]   = note: #[warn(unused_imports)] on by default
Dec 04 20:15:24.219 INFO [stderr] 
Dec 04 20:15:24.615 INFO [stderr] warning: unused import: `futures::try_ready`
Dec 04 20:15:24.615 INFO [stderr]  --> src/concurrent_send_recv.rs:7:5
Dec 04 20:15:24.615 INFO [stderr]   |
Dec 04 20:15:24.616 INFO [stderr] 7 | use futures::try_ready;
Dec 04 20:15:24.616 INFO [stderr]   |     ^^^^^^^^^^^^^^^^^^
Dec 04 20:15:24.616 INFO [stderr]   |
Dec 04 20:15:24.617 INFO [stderr]   = note: #[warn(unused_imports)] on by default
Dec 04 20:15:24.617 INFO [stderr] 
Dec 04 20:15:24.691 INFO [stderr] warning: unused variable: `stdout`
Dec 04 20:15:24.691 INFO [stderr]   --> src/tcp_client.rs:12:13
Dec 04 20:15:24.692 INFO [stderr]    |
Dec 04 20:15:24.692 INFO [stderr] 12 |     let mut stdout = io::stdout();
Dec 04 20:15:24.692 INFO [stderr]    |             ^^^^^^ help: consider using `_stdout` instead
Dec 04 20:15:24.703 INFO [stderr]    |
Dec 04 20:15:24.703 INFO [stderr]    = note: #[warn(unused_variables)] on by default
Dec 04 20:15:24.703 INFO [stderr] 
Dec 04 20:15:24.828 INFO [stderr] warning: variable does not need to be mutable
Dec 04 20:15:24.828 INFO [stderr]   --> src/tcp_client.rs:12:9
Dec 04 20:15:24.828 INFO [stderr]    |
Dec 04 20:15:24.828 INFO [stderr] 12 |     let mut stdout = io::stdout();
Dec 04 20:15:24.828 INFO [stderr]    |         ----^^^^^^
Dec 04 20:15:24.828 INFO [stderr]    |         |
Dec 04 20:15:24.828 INFO [stderr]    |         help: remove this `mut`
Dec 04 20:15:24.828 INFO [stderr]    |
Dec 04 20:15:24.828 INFO [stderr]    = note: #[warn(unused_mut)] on by default
Dec 04 20:15:24.828 INFO [stderr] 
Dec 04 20:15:25.228 INFO [stderr] warning: unused variable: `e`
Dec 04 20:15:25.228 INFO [stderr]   --> src/tcp_server3.rs:29:31
Dec 04 20:15:25.228 INFO [stderr]    |
Dec 04 20:15:25.228 INFO [stderr] 29 |                     .map_err(|e| std::io::Error::new(std::io::ErrorKind::Other, "oh no!"))
Dec 04 20:15:25.228 INFO [stderr]    |                               ^ help: consider using `_e` instead
Dec 04 20:15:25.228 INFO [stderr]    |
Dec 04 20:15:25.228 INFO [stderr]    = note: #[warn(unused_variables)] on by default
Dec 04 20:15:25.228 INFO [stderr] 
Dec 04 20:15:31.037 INFO [stderr] warning: unused import: `tokio::io`
Dec 04 20:15:31.037 INFO [stderr]  --> src/tcp_server.rs:5:5
Dec 04 20:15:31.037 INFO [stderr]   |
Dec 04 20:15:31.037 INFO [stderr] 5 | use tokio::io;
Dec 04 20:15:31.037 INFO [stderr]   |     ^^^^^^^^^
Dec 04 20:15:31.037 INFO [stderr]   |
Dec 04 20:15:31.037 INFO [stderr]   = note: #[warn(unused_imports)] on by default
Dec 04 20:15:31.037 INFO [stderr] 
Dec 04 20:15:31.359 INFO [stderr] warning: unused import: `tokio::prelude`
Dec 04 20:15:31.359 INFO [stderr]  --> src/tcp_server.rs:7:5
Dec 04 20:15:31.359 INFO [stderr]   |
Dec 04 20:15:31.359 INFO [stderr] 7 | use tokio::prelude::*;
Dec 04 20:15:31.359 INFO [stderr]   |     ^^^^^^^^^^^^^^
Dec 04 20:15:31.362 INFO [stderr] 
Dec 04 20:15:31.366 INFO [stderr] warning: unused variable: `e`
Dec 04 20:15:31.366 INFO [stderr]   --> src/tcp_server.rs:37:31
Dec 04 20:15:31.366 INFO [stderr]    |
Dec 04 20:15:31.366 INFO [stderr] 37 |                     .map_err(|e| std::io::Error::new(std::io::ErrorKind::Other, "oh no!"))
Dec 04 20:15:31.366 INFO [stderr]    |                               ^ help: consider using `_e` instead
Dec 04 20:15:31.373 INFO [stderr]    |
Dec 04 20:15:31.373 INFO [stderr]    = note: #[warn(unused_variables)] on by default
Dec 04 20:15:31.373 INFO [stderr] 
Dec 04 20:15:33.703 INFO [stderr] warning: unused import: `futures::try_ready`
Dec 04 20:15:33.703 INFO [stderr]  --> src/concurrent_send_recv.rs:7:5
Dec 04 20:15:33.703 INFO [stderr]   |
Dec 04 20:15:33.703 INFO [stderr] 7 | use futures::try_ready;
Dec 04 20:15:33.703 INFO [stderr]   |     ^^^^^^^^^^^^^^^^^^
Dec 04 20:15:33.715 INFO [stderr]   |
Dec 04 20:15:33.715 INFO [stderr]   = note: #[warn(unused_imports)] on by default
Dec 04 20:15:33.715 INFO [stderr] 
Dec 04 20:15:34.687 INFO [stderr] warning: unused variable: `e`
Dec 04 20:15:34.687 INFO [stderr]   --> src/tcp_server3.rs:29:31
Dec 04 20:15:34.687 INFO [stderr]    |
Dec 04 20:15:34.687 INFO [stderr] 29 |                     .map_err(|e| std::io::Error::new(std::io::ErrorKind::Other, "oh no!"))
Dec 04 20:15:34.687 INFO [stderr]    |                               ^ help: consider using `_e` instead
Dec 04 20:15:34.687 INFO [stderr]    |
Dec 04 20:15:34.687 INFO [stderr]    = note: #[warn(unused_variables)] on by default
Dec 04 20:15:34.687 INFO [stderr] 
Dec 04 20:15:41.573 INFO [stderr] warning: unused import: `tokio::io`
Dec 04 20:15:41.573 INFO [stderr]  --> src/tcp_server.rs:5:5
Dec 04 20:15:41.573 INFO [stderr]   |
Dec 04 20:15:41.573 INFO [stderr] 5 | use tokio::io;
Dec 04 20:15:41.573 INFO [stderr]   |     ^^^^^^^^^
Dec 04 20:15:41.573 INFO [stderr]   |
Dec 04 20:15:41.573 INFO [stderr]   = note: #[warn(unused_imports)] on by default
Dec 04 20:15:41.573 INFO [stderr] 
Dec 04 20:15:41.935 INFO [stderr] warning: unused import: `tokio::prelude`
Dec 04 20:15:41.935 INFO [stderr]  --> src/tcp_server.rs:7:5
Dec 04 20:15:41.935 INFO [stderr]   |
Dec 04 20:15:41.935 INFO [stderr] 7 | use tokio::prelude::*;
Dec 04 20:15:41.935 INFO [stderr]   |     ^^^^^^^^^^^^^^
Dec 04 20:15:41.951 INFO [stderr] 
Dec 04 20:15:41.951 INFO [stderr] warning: unused variable: `e`
Dec 04 20:15:41.951 INFO [stderr]   --> src/tcp_server.rs:37:31
Dec 04 20:15:41.951 INFO [stderr]    |
Dec 04 20:15:41.951 INFO [stderr] 37 |                     .map_err(|e| std::io::Error::new(std::io::ErrorKind::Other, "oh no!"))
Dec 04 20:15:41.951 INFO [stderr]    |                               ^ help: consider using `_e` instead
Dec 04 20:15:41.955 INFO [stderr]    |
Dec 04 20:15:41.955 INFO [stderr]    = note: #[warn(unused_variables)] on by default
Dec 04 20:15:41.955 INFO [stderr] 
Dec 04 20:15:42.647 INFO [stderr] warning: unused variable: `stdout`
Dec 04 20:15:42.647 INFO [stderr]   --> src/tcp_client.rs:12:13
Dec 04 20:15:42.647 INFO [stderr]    |
Dec 04 20:15:42.647 INFO [stderr] 12 |     let mut stdout = io::stdout();
Dec 04 20:15:42.647 INFO [stderr]    |             ^^^^^^ help: consider using `_stdout` instead
Dec 04 20:15:42.647 INFO [stderr]    |
Dec 04 20:15:42.647 INFO [stderr]    = note: #[warn(unused_variables)] on by default
Dec 04 20:15:42.647 INFO [stderr] 
Dec 04 20:15:42.714 INFO [stderr] warning: variable does not need to be mutable
Dec 04 20:15:42.715 INFO [stderr]   --> src/tcp_client.rs:12:9
Dec 04 20:15:42.715 INFO [stderr]    |
Dec 04 20:15:42.715 INFO [stderr] 12 |     let mut stdout = io::stdout();
Dec 04 20:15:42.715 INFO [stderr]    |         ----^^^^^^
Dec 04 20:15:42.715 INFO [stderr]    |         |
Dec 04 20:15:42.715 INFO [stderr]    |         help: remove this `mut`
Dec 04 20:15:42.715 INFO [stderr]    |
Dec 04 20:15:42.715 INFO [stderr]    = note: #[warn(unused_mut)] on by default
Dec 04 20:15:42.715 INFO [stderr] 
Dec 04 20:15:42.899 INFO [stderr] warning: unused import: `futures::try_ready`
Dec 04 20:15:42.899 INFO [stderr]  --> src/concurrent_send_recv2.rs:7:5
Dec 04 20:15:42.899 INFO [stderr]   |
Dec 04 20:15:42.899 INFO [stderr] 7 | use futures::try_ready;
Dec 04 20:15:42.899 INFO [stderr]   |     ^^^^^^^^^^^^^^^^^^
Dec 04 20:15:42.899 INFO [stderr]   |
Dec 04 20:15:42.899 INFO [stderr]   = note: #[warn(unused_imports)] on by default
Dec 04 20:15:42.899 INFO [stderr] 
Dec 04 20:15:43.072 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 30.26s
Dec 04 20:15:43.085 INFO [stderr] su: No module specific data is present
Dec 04 20:15:43.723 INFO running `"docker" "inspect" "c0b66a18d13fc9adb118d743c0ef2b826fbb96396e33ab710ddd62f719535139"`
Dec 04 20:15:44.008 INFO running `"docker" "rm" "-f" "c0b66a18d13fc9adb118d743c0ef2b826fbb96396e33ab710ddd62f719535139"`
Dec 04 20:15:44.186 INFO [stdout] c0b66a18d13fc9adb118d743c0ef2b826fbb96396e33ab710ddd62f719535139