[INFO] updating cached repository jakobdalsgaard/rust-examples
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/jakobdalsgaard/rust-examples
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/jakobdalsgaard/rust-examples" "work/ex/pr-60162/sources/master#a850a426491e14186af2250549bf41256b5938d2/gh/jakobdalsgaard/rust-examples"`
[INFO] [stderr] Cloning into 'work/ex/pr-60162/sources/master#a850a426491e14186af2250549bf41256b5938d2/gh/jakobdalsgaard/rust-examples'...
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[INFO] running `"git" "clone" "work/cache/sources/gh/jakobdalsgaard/rust-examples" "work/ex/pr-60162/sources/try#06a150c7d11500b41499224f165e9de1de096768/gh/jakobdalsgaard/rust-examples"`
[INFO] [stderr] Cloning into 'work/ex/pr-60162/sources/try#06a150c7d11500b41499224f165e9de1de096768/gh/jakobdalsgaard/rust-examples'...
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[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 8fc63475160148cdaf75c5f4ed0df6d679186a5f
[INFO] sha for GitHub repo jakobdalsgaard/rust-examples: 8fc63475160148cdaf75c5f4ed0df6d679186a5f
[INFO] validating manifest of jakobdalsgaard/rust-examples on toolchain master#a850a426491e14186af2250549bf41256b5938d2
[INFO] running `"/mnt/crater-raid/crater/work/local/cargo-home/bin/cargo" "+a850a426491e14186af2250549bf41256b5938d2-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of jakobdalsgaard/rust-examples on toolchain try#06a150c7d11500b41499224f165e9de1de096768
[INFO] running `"/mnt/crater-raid/crater/work/local/cargo-home/bin/cargo" "+06a150c7d11500b41499224f165e9de1de096768-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing jakobdalsgaard/rust-examples
[INFO] finished frobbing jakobdalsgaard/rust-examples
[INFO] frobbed toml for jakobdalsgaard/rust-examples written to work/ex/pr-60162/sources/master#a850a426491e14186af2250549bf41256b5938d2/gh/jakobdalsgaard/rust-examples/Cargo.toml
[INFO] started frobbing jakobdalsgaard/rust-examples
[INFO] finished frobbing jakobdalsgaard/rust-examples
[INFO] frobbed toml for jakobdalsgaard/rust-examples written to work/ex/pr-60162/sources/try#06a150c7d11500b41499224f165e9de1de096768/gh/jakobdalsgaard/rust-examples/Cargo.toml
[INFO] crate jakobdalsgaard/rust-examples already has a lockfile, it will not be regenerated
[INFO] running `"/mnt/crater-raid/crater/work/local/cargo-home/bin/cargo" "+a850a426491e14186af2250549bf41256b5938d2-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/crater-raid/crater/work/local/cargo-home/bin/cargo" "+06a150c7d11500b41499224f165e9de1de096768-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] checking jakobdalsgaard/rust-examples against master#a850a426491e14186af2250549bf41256b5938d2 for pr-60162
[INFO] running `"docker" "create" "-v" "/mnt/crater-raid/crater/work/local/target-dirs/pr-60162/worker-7/master#a850a426491e14186af2250549bf41256b5938d2:/opt/crater/target:rw,Z" "-v" "/mnt/crater-raid/crater/work/ex/pr-60162/sources/master#a850a426491e14186af2250549bf41256b5938d2/gh/jakobdalsgaard/rust-examples:/opt/crater/workdir:ro,Z" "-v" "/mnt/crater-raid/crater/work/local/cargo-home:/opt/crater/cargo-home:ro,Z" "-v" "/mnt/crater-raid/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" "+a850a426491e14186af2250549bf41256b5938d2-alt" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stdout] c46e5244af1bab98469042c10be2a09ebb3283948faf7ae21d2876b317204957
[INFO] running `"docker" "start" "-a" "c46e5244af1bab98469042c10be2a09ebb3283948faf7ae21d2876b317204957"`
[INFO] [stderr]     Checking log v0.3.6
[INFO] [stderr]     Checking futures v0.1.10
[INFO] [stderr]     Checking rust-examples v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: unused import: `futures::sync::mpsc::Sender`
[INFO] [stderr]  --> examples/futurechannels.rs:7:5
[INFO] [stderr]   |
[INFO] [stderr] 7 | use futures::sync::mpsc::Sender;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: #[warn(unused_imports)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]  --> examples/stdchannels.rs:8:16
[INFO] [stderr]   |
[INFO] [stderr] 8 |   let (mut tx, mut rx) = sync_channel(0);
[INFO] [stderr]   |                ----^^
[INFO] [stderr]   |                |
[INFO] [stderr]   |                help: remove this `mut`
[INFO] [stderr]   |
[INFO] [stderr]   = note: #[warn(unused_mut)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]  --> examples/stdchannels.rs:8:8
[INFO] [stderr]   |
[INFO] [stderr] 8 |   let (mut tx, mut rx) = sync_channel(0);
[INFO] [stderr]   |        ----^^
[INFO] [stderr]   |        |
[INFO] [stderr]   |        help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]   --> examples/stdchannels.rs:17:7
[INFO] [stderr]    |
[INFO] [stderr] 17 |       tx.send(7);
[INFO] [stderr]    |       ^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(unused_must_use)] on by default
[INFO] [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::thread`
[INFO] [stderr]  --> examples/inc.rs:1:5
[INFO] [stderr]   |
[INFO] [stderr] 1 | use std::thread;
[INFO] [stderr]   |     ^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: #[warn(unused_imports)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::sync::mpsc::channel`
[INFO] [stderr]  --> examples/inc.rs:2:5
[INFO] [stderr]   |
[INFO] [stderr] 2 | use std::sync::mpsc::channel;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `child2`
[INFO] [stderr]   --> examples/futurechannels.rs:28:7
[INFO] [stderr]    |
[INFO] [stderr] 28 |   let child2 = thread::spawn(move || {
[INFO] [stderr]    |       ^^^^^^ help: consider prefixing with an underscore: `_child2`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(unused_variables)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `rest`
[INFO] [stderr]   --> examples/futurechannels.rs:66:14
[INFO] [stderr]    |
[INFO] [stderr] 66 |   let (item, rest) = rest.into_future().wait().ok().unwrap();
[INFO] [stderr]    |              ^^^^ help: consider prefixing with an underscore: `_rest`
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]   --> examples/futurechannels.rs:14:5
[INFO] [stderr]    |
[INFO] [stderr] 14 | /     receiver.map(|i| {
[INFO] [stderr] 15 | |       println!("got: {}", i);
[INFO] [stderr] 16 | |     }).wait();
[INFO] [stderr]    | |______________^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(unused_must_use)] on by default
[INFO] [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]   --> examples/futurechannels.rs:30:5
[INFO] [stderr]    |
[INFO] [stderr] 30 |     sender2.send(1).and_then(|tx| { println!("sending 2"); tx.send(2) } ).wait();
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]   --> examples/futurechannels.rs:49:3
[INFO] [stderr]    |
[INFO] [stderr] 49 |   sender3.send(5).and_then(|tx| tx.send(6)).wait();
[INFO] [stderr]    |   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 3.20s
[INFO] running `"docker" "inspect" "c46e5244af1bab98469042c10be2a09ebb3283948faf7ae21d2876b317204957"`
[INFO] running `"docker" "rm" "-f" "c46e5244af1bab98469042c10be2a09ebb3283948faf7ae21d2876b317204957"`
[INFO] [stdout] c46e5244af1bab98469042c10be2a09ebb3283948faf7ae21d2876b317204957