[INFO] updating cached repository https://github.com/jakobdalsgaard/rust-examples
[INFO] running `"git" "-c" "credential.helper=" "-c" "credential.helper=/big/crater/work/cargo-home/bin/git-credential-null" "-c" "remote.origin.fetch=refs/heads/*:refs/heads/*" "fetch" "origin" "--force" "--prune"`
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 8fc63475160148cdaf75c5f4ed0df6d679186a5f
[INFO] testing jakobdalsgaard/rust-examples against beta-2019-09-28 for beta-1.39-1
[INFO] running `"git" "clone" "work/cache/git-repos/https%3A%2F%2Fgithub.com%2Fjakobdalsgaard%2Frust-examples" "work/builds/worker-3/source"`
[INFO] [stderr] Cloning into 'work/builds/worker-3/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/jakobdalsgaard/rust-examples on toolchain beta-2019-09-28
[INFO] running `"/big/crater/work/cargo-home/bin/cargo" "+beta-2019-09-28" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking git repo https://github.com/jakobdalsgaard/rust-examples
[INFO] finished tweaking git repo https://github.com/jakobdalsgaard/rust-examples
[INFO] tweaked toml for git repo https://github.com/jakobdalsgaard/rust-examples written to work/builds/worker-3/source/Cargo.toml
[INFO] crate git repo https://github.com/jakobdalsgaard/rust-examples already has a lockfile, it will not be regenerated
[INFO] running `"/big/crater/work/cargo-home/bin/cargo" "+beta-2019-09-28" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"docker" "create" "-v" "/big/crater/work/builds/worker-3/target:/opt/rustwide/target:rw,Z" "-v" "/big/crater/work/builds/worker-3/source:/opt/rustwide/workdir:ro,Z" "-v" "/big/crater/work/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/big/crater/work/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "MAP_USER_ID=1000" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--network" "none" "rustops/crates-build-env" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2019-09-28" "build" "--frozen"`
[INFO] [stdout] 6ae9d099f481a00260778231cc0ca946e79e029d51134ba0dd1805b3ddc0fa53
[INFO] running `"docker" "start" "-a" "6ae9d099f481a00260778231cc0ca946e79e029d51134ba0dd1805b3ddc0fa53"`
[INFO] [stderr]    Compiling log v0.3.6
[INFO] [stderr]    Compiling futures v0.1.10
[INFO] [stderr]    Compiling rust-examples v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 2.36s
[INFO] running `"docker" "inspect" "6ae9d099f481a00260778231cc0ca946e79e029d51134ba0dd1805b3ddc0fa53"`
[INFO] running `"docker" "rm" "-f" "6ae9d099f481a00260778231cc0ca946e79e029d51134ba0dd1805b3ddc0fa53"`
[INFO] [stdout] 6ae9d099f481a00260778231cc0ca946e79e029d51134ba0dd1805b3ddc0fa53
[INFO] running `"docker" "create" "-v" "/big/crater/work/builds/worker-3/target:/opt/rustwide/target:rw,Z" "-v" "/big/crater/work/builds/worker-3/source:/opt/rustwide/workdir:ro,Z" "-v" "/big/crater/work/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/big/crater/work/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "MAP_USER_ID=1000" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--network" "none" "rustops/crates-build-env" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2019-09-28" "test" "--frozen" "--no-run"`
[INFO] [stdout] 1fa743fc1142c8144cbef5ac876387520efb0a2a1f7653ce29d4e0a51487a2c4
[INFO] running `"docker" "start" "-a" "1fa743fc1142c8144cbef5ac876387520efb0a2a1f7653ce29d4e0a51487a2c4"`
[INFO] [stderr]    Compiling rust-examples v0.1.0 (/opt/rustwide/workdir)
[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: 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]   = note: `#[warn(unused_mut)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]  --> examples/stdchannels.rs:8:16
[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] 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: `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: 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 1.00s
[INFO] running `"docker" "inspect" "1fa743fc1142c8144cbef5ac876387520efb0a2a1f7653ce29d4e0a51487a2c4"`
[INFO] running `"docker" "rm" "-f" "1fa743fc1142c8144cbef5ac876387520efb0a2a1f7653ce29d4e0a51487a2c4"`
[INFO] [stdout] 1fa743fc1142c8144cbef5ac876387520efb0a2a1f7653ce29d4e0a51487a2c4
[INFO] running `"docker" "create" "-v" "/big/crater/work/builds/worker-3/target:/opt/rustwide/target:rw,Z" "-v" "/big/crater/work/builds/worker-3/source:/opt/rustwide/workdir:ro,Z" "-v" "/big/crater/work/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/big/crater/work/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "MAP_USER_ID=1000" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--network" "none" "rustops/crates-build-env" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2019-09-28" "test" "--frozen"`
[INFO] [stdout] 4cfdaf6a84ea7bbc041ad9f208c2b97de3e149dfd8ab28613797117f3abeecba
[INFO] running `"docker" "start" "-a" "4cfdaf6a84ea7bbc041ad9f208c2b97de3e149dfd8ab28613797117f3abeecba"`
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.03s
[INFO] [stderr]      Running /opt/rustwide/target/debug/deps/rust_examples-a581aa83fd89d467
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] running `"docker" "inspect" "4cfdaf6a84ea7bbc041ad9f208c2b97de3e149dfd8ab28613797117f3abeecba"`
[INFO] running `"docker" "rm" "-f" "4cfdaf6a84ea7bbc041ad9f208c2b97de3e149dfd8ab28613797117f3abeecba"`
[INFO] [stdout] 4cfdaf6a84ea7bbc041ad9f208c2b97de3e149dfd8ab28613797117f3abeecba