Dec 04 16:55:01.080 INFO checking jakobdalsgaard/rust-examples against try#1df97983eb2057dc6a8f7eb364e263b51ae23230 for pr-56481
Dec 04 16:55:01.080 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-56481/worker-7/try#1df97983eb2057dc6a8f7eb364e263b51ae23230:/target:rw,Z" "-v" "/mnt/big/crater/work/local/test-source/worker-7/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 16:55:01.273 INFO [stdout] 881516fd0ca02146f9cf86f3ee9f3c388c1c48945b0c9234f24d4a2c659aa425
Dec 04 16:55:01.280 INFO running `"docker" "start" "-a" "881516fd0ca02146f9cf86f3ee9f3c388c1c48945b0c9234f24d4a2c659aa425"`
Dec 04 16:55:02.286 INFO [stderr] usermod: no changes
Dec 04 16:55:02.332 INFO [stderr]     Checking log v0.3.6
Dec 04 16:55:02.551 INFO [stderr]     Checking futures v0.1.10
Dec 04 16:55:04.583 INFO [stderr]     Checking rust-examples v0.1.0 (/source)
Dec 04 16:55:05.487 INFO [stderr] warning: unused import: `std::thread`
Dec 04 16:55:05.487 INFO [stderr]  --> examples/inc.rs:1:5
Dec 04 16:55:05.487 INFO [stderr]   |
Dec 04 16:55:05.487 INFO [stderr] 1 | use std::thread;
Dec 04 16:55:05.487 INFO [stderr]   |     ^^^^^^^^^^^
Dec 04 16:55:05.487 INFO [stderr]   |
Dec 04 16:55:05.487 INFO [stderr]   = note: #[warn(unused_imports)] on by default
Dec 04 16:55:05.487 INFO [stderr] 
Dec 04 16:55:05.487 INFO [stderr] warning: unused import: `std::sync::mpsc::channel`
Dec 04 16:55:05.487 INFO [stderr]  --> examples/inc.rs:2:5
Dec 04 16:55:05.487 INFO [stderr]   |
Dec 04 16:55:05.487 INFO [stderr] 2 | use std::sync::mpsc::channel;
Dec 04 16:55:05.487 INFO [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^^^^
Dec 04 16:55:05.487 INFO [stderr] 
Dec 04 16:55:05.531 INFO [stderr] warning: unused import: `futures::sync::mpsc::Sender`
Dec 04 16:55:05.531 INFO [stderr]  --> examples/futurechannels.rs:7:5
Dec 04 16:55:05.531 INFO [stderr]   |
Dec 04 16:55:05.531 INFO [stderr] 7 | use futures::sync::mpsc::Sender;
Dec 04 16:55:05.531 INFO [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 04 16:55:05.531 INFO [stderr]   |
Dec 04 16:55:05.531 INFO [stderr]   = note: #[warn(unused_imports)] on by default
Dec 04 16:55:05.531 INFO [stderr] 
Dec 04 16:55:05.575 INFO [stderr] warning: unused variable: `child2`
Dec 04 16:55:05.575 INFO [stderr]   --> examples/futurechannels.rs:28:7
Dec 04 16:55:05.575 INFO [stderr]    |
Dec 04 16:55:05.575 INFO [stderr] 28 |   let child2 = thread::spawn(move || {
Dec 04 16:55:05.575 INFO [stderr]    |       ^^^^^^ help: consider using `_child2` instead
Dec 04 16:55:05.575 INFO [stderr]    |
Dec 04 16:55:05.575 INFO [stderr]    = note: #[warn(unused_variables)] on by default
Dec 04 16:55:05.575 INFO [stderr] 
Dec 04 16:55:05.575 INFO [stderr] warning: unused variable: `rest`
Dec 04 16:55:05.575 INFO [stderr]   --> examples/futurechannels.rs:66:14
Dec 04 16:55:05.575 INFO [stderr]    |
Dec 04 16:55:05.575 INFO [stderr] 66 |   let (item, rest) = rest.into_future().wait().ok().unwrap();
Dec 04 16:55:05.575 INFO [stderr]    |              ^^^^ help: consider using `_rest` instead
Dec 04 16:55:05.575 INFO [stderr] 
Dec 04 16:55:05.578 INFO [stderr] warning: variable does not need to be mutable
Dec 04 16:55:05.578 INFO [stderr]  --> examples/stdchannels.rs:8:16
Dec 04 16:55:05.578 INFO [stderr]   |
Dec 04 16:55:05.578 INFO [stderr] 8 |   let (mut tx, mut rx) = sync_channel(0);
Dec 04 16:55:05.578 INFO [stderr]   |                ----^^
Dec 04 16:55:05.578 INFO [stderr]   |                |
Dec 04 16:55:05.578 INFO [stderr]   |                help: remove this `mut`
Dec 04 16:55:05.578 INFO [stderr]   |
Dec 04 16:55:05.578 INFO [stderr]   = note: #[warn(unused_mut)] on by default
Dec 04 16:55:05.578 INFO [stderr] 
Dec 04 16:55:05.578 INFO [stderr] warning: variable does not need to be mutable
Dec 04 16:55:05.578 INFO [stderr]  --> examples/stdchannels.rs:8:8
Dec 04 16:55:05.578 INFO [stderr]   |
Dec 04 16:55:05.578 INFO [stderr] 8 |   let (mut tx, mut rx) = sync_channel(0);
Dec 04 16:55:05.578 INFO [stderr]   |        ----^^
Dec 04 16:55:05.578 INFO [stderr]   |        |
Dec 04 16:55:05.578 INFO [stderr]   |        help: remove this `mut`
Dec 04 16:55:05.578 INFO [stderr] 
Dec 04 16:55:05.587 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 04 16:55:05.587 INFO [stderr]   --> examples/stdchannels.rs:17:7
Dec 04 16:55:05.587 INFO [stderr]    |
Dec 04 16:55:05.587 INFO [stderr] 17 |       tx.send(7);
Dec 04 16:55:05.587 INFO [stderr]    |       ^^^^^^^^^^^
Dec 04 16:55:05.594 INFO [stderr]    |
Dec 04 16:55:05.594 INFO [stderr]    = note: #[warn(unused_must_use)] on by default
Dec 04 16:55:05.594 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 04 16:55:05.594 INFO [stderr] 
Dec 04 16:55:05.599 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 04 16:55:05.599 INFO [stderr]   --> examples/futurechannels.rs:14:5
Dec 04 16:55:05.599 INFO [stderr]    |
Dec 04 16:55:05.599 INFO [stderr] 14 | /     receiver.map(|i| {
Dec 04 16:55:05.599 INFO [stderr] 15 | |       println!("got: {}", i);
Dec 04 16:55:05.599 INFO [stderr] 16 | |     }).wait();
Dec 04 16:55:05.599 INFO [stderr]    | |______________^
Dec 04 16:55:05.599 INFO [stderr]    |
Dec 04 16:55:05.599 INFO [stderr]    = note: #[warn(unused_must_use)] on by default
Dec 04 16:55:05.599 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 04 16:55:05.599 INFO [stderr] 
Dec 04 16:55:05.599 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 04 16:55:05.599 INFO [stderr]   --> examples/futurechannels.rs:30:5
Dec 04 16:55:05.599 INFO [stderr]    |
Dec 04 16:55:05.599 INFO [stderr] 30 |     sender2.send(1).and_then(|tx| { println!("sending 2"); tx.send(2) } ).wait();
Dec 04 16:55:05.599 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 04 16:55:05.599 INFO [stderr]    |
Dec 04 16:55:05.599 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 04 16:55:05.599 INFO [stderr] 
Dec 04 16:55:05.599 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 04 16:55:05.599 INFO [stderr]   --> examples/futurechannels.rs:49:3
Dec 04 16:55:05.599 INFO [stderr]    |
Dec 04 16:55:05.599 INFO [stderr] 49 |   sender3.send(5).and_then(|tx| tx.send(6)).wait();
Dec 04 16:55:05.599 INFO [stderr]    |   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 04 16:55:05.599 INFO [stderr]    |
Dec 04 16:55:05.599 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 04 16:55:05.599 INFO [stderr] 
Dec 04 16:55:05.655 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 3.34s
Dec 04 16:55:05.655 INFO [stderr] su: No module specific data is present
Dec 04 16:55:06.208 INFO running `"docker" "inspect" "881516fd0ca02146f9cf86f3ee9f3c388c1c48945b0c9234f24d4a2c659aa425"`
Dec 04 16:55:06.427 INFO running `"docker" "rm" "-f" "881516fd0ca02146f9cf86f3ee9f3c388c1c48945b0c9234f24d4a2c659aa425"`
Dec 04 16:55:06.729 INFO [stdout] 881516fd0ca02146f9cf86f3ee9f3c388c1c48945b0c9234f24d4a2c659aa425