[INFO] cloning repository https://github.com/jakobdalsgaard/rust-examples
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/jakobdalsgaard/rust-examples" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fjakobdalsgaard%2Frust-examples", kill_on_drop: false }`
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[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 8fc63475160148cdaf75c5f4ed0df6d679186a5f
[INFO] testing jakobdalsgaard/rust-examples against 1.59.0 for beta-1.60-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fjakobdalsgaard%2Frust-examples" "/workspace/builds/worker-50/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-50/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/jakobdalsgaard/rust-examples on toolchain 1.59.0
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[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 /workspace/builds/worker-50/source/Cargo.toml
[INFO] crate git repo https://github.com/jakobdalsgaard/rust-examples already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.59.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
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[INFO] [stderr]     Blocking waiting for file lock on package cache
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[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-50/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-50/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-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" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:0cd99ca24d8e8c98e67c542213511d985b8778b5bdcbb160e038429496686047" "/opt/rustwide/cargo-home/bin/cargo" "+1.59.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] adc4b9078ed3e7c1a213669f64b7062c8e6e02dd660cc462d5ac0aa57e52c5c1
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[INFO] [stderr]     Blocking waiting for file lock on package cache
[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 36.96s
[INFO] running `Command { std: "docker" "inspect" "adc4b9078ed3e7c1a213669f64b7062c8e6e02dd660cc462d5ac0aa57e52c5c1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "adc4b9078ed3e7c1a213669f64b7062c8e6e02dd660cc462d5ac0aa57e52c5c1", kill_on_drop: false }`
[INFO] [stdout] adc4b9078ed3e7c1a213669f64b7062c8e6e02dd660cc462d5ac0aa57e52c5c1
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-50/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-50/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-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" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:0cd99ca24d8e8c98e67c542213511d985b8778b5bdcbb160e038429496686047" "/opt/rustwide/cargo-home/bin/cargo" "+1.59.0" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 3533570ac71fdf11c0f94b4108047461c11725623ffd2ee7a3855dcdffa8bae8
[INFO] running `Command { std: "docker" "start" "-a" "3533570ac71fdf11c0f94b4108047461c11725623ffd2ee7a3855dcdffa8bae8", kill_on_drop: false }`
[INFO] [stderr]    Compiling rust-examples v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `std::thread`
[INFO] [stdout]  --> examples/inc.rs:1:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::thread;
[INFO] [stdout]   |     ^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::sync::mpsc::channel`
[INFO] [stdout]  --> examples/inc.rs:2:5
[INFO] [stdout]   |
[INFO] [stdout] 2 | use std::sync::mpsc::channel;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `futures::sync::mpsc::Sender`
[INFO] [stdout]  --> examples/futurechannels.rs:7:5
[INFO] [stdout]   |
[INFO] [stdout] 7 | use futures::sync::mpsc::Sender;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `child2`
[INFO] [stdout]   --> examples/futurechannels.rs:28:7
[INFO] [stdout]    |
[INFO] [stdout] 28 |   let child2 = thread::spawn(move || {
[INFO] [stdout]    |       ^^^^^^ help: if this is intentional, prefix it with an underscore: `_child2`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `rest`
[INFO] [stdout]   --> examples/futurechannels.rs:66:14
[INFO] [stdout]    |
[INFO] [stdout] 66 |   let (item, rest) = rest.into_future().wait().ok().unwrap();
[INFO] [stdout]    |              ^^^^ help: if this is intentional, prefix it with an underscore: `_rest`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> examples/futurechannels.rs:14:5
[INFO] [stdout]    |
[INFO] [stdout] 14 | /     receiver.map(|i| {
[INFO] [stdout] 15 | |       println!("got: {}", i);
[INFO] [stdout] 16 | |     }).wait();
[INFO] [stdout]    | |______________^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> examples/futurechannels.rs:30:5
[INFO] [stdout]    |
[INFO] [stdout] 30 |     sender2.send(1).and_then(|tx| { println!("sending 2"); tx.send(2) } ).wait();
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> examples/futurechannels.rs:49:3
[INFO] [stdout]    |
[INFO] [stdout] 49 |   sender3.send(5).and_then(|tx| tx.send(6)).wait();
[INFO] [stdout]    |   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]  --> examples/stdchannels.rs:8:8
[INFO] [stdout]   |
[INFO] [stdout] 8 |   let (mut tx, mut rx) = sync_channel(0);
[INFO] [stdout]   |        ----^^
[INFO] [stdout]   |        |
[INFO] [stdout]   |        help: remove this `mut`
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_mut)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]  --> examples/stdchannels.rs:8:16
[INFO] [stdout]   |
[INFO] [stdout] 8 |   let (mut tx, mut rx) = sync_channel(0);
[INFO] [stdout]   |                ----^^
[INFO] [stdout]   |                |
[INFO] [stdout]   |                help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> examples/stdchannels.rs:17:7
[INFO] [stdout]    |
[INFO] [stdout] 17 |       tx.send(7);
[INFO] [stdout]    |       ^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 3 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 6 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 1.55s
[INFO] running `Command { std: "docker" "inspect" "3533570ac71fdf11c0f94b4108047461c11725623ffd2ee7a3855dcdffa8bae8", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "3533570ac71fdf11c0f94b4108047461c11725623ffd2ee7a3855dcdffa8bae8", kill_on_drop: false }`
[INFO] [stdout] 3533570ac71fdf11c0f94b4108047461c11725623ffd2ee7a3855dcdffa8bae8
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-50/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-50/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-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" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:0cd99ca24d8e8c98e67c542213511d985b8778b5bdcbb160e038429496686047" "/opt/rustwide/cargo-home/bin/cargo" "+1.59.0" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] c6fbbe0241044029eb88fd14f61aeac37eea397aa2d81e12afe2a9b9b616c198
[INFO] running `Command { std: "docker" "start" "-a" "c6fbbe0241044029eb88fd14f61aeac37eea397aa2d81e12afe2a9b9b616c198", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[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 `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: `rust-examples` (example "stdchannels") generated 3 warnings
[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: if this is intentional, prefix it 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: if this is intentional, prefix it with an underscore: `_rest`
[INFO] [stderr] 
[INFO] [stderr] warning: unused `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 `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 `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] 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: `rust-examples` (example "futurechannels") generated 6 warnings
[INFO] [stderr] warning: `rust-examples` (example "inc") generated 2 warnings
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 4.17s
[INFO] [stderr]      Running unittests (/opt/rustwide/target/debug/deps/rust_examples-fc5219db60750cc0)
[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; finished in 0.00s
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "c6fbbe0241044029eb88fd14f61aeac37eea397aa2d81e12afe2a9b9b616c198", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c6fbbe0241044029eb88fd14f61aeac37eea397aa2d81e12afe2a9b9b616c198", kill_on_drop: false }`
[INFO] [stdout] c6fbbe0241044029eb88fd14f61aeac37eea397aa2d81e12afe2a9b9b616c198