[INFO] crate tacho 0.4.2 is already in cache
[INFO] extracting crate tacho 0.4.2 into work/ex/clippy-test-run/sources/stable/reg/tacho/0.4.2
[INFO] extracting crate tacho 0.4.2 into work/ex/clippy-test-run/sources/stable+rustflags=-Dclippy%3A%3Ainto_iter_on_array/reg/tacho/0.4.2
[INFO] validating manifest of tacho-0.4.2 on toolchain stable
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+stable" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of tacho-0.4.2 on toolchain stable+rustflags=-Dclippy::into_iter_on_array
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+stable" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing tacho-0.4.2
[INFO] finished frobbing tacho-0.4.2
[INFO] frobbed toml for tacho-0.4.2 written to work/ex/clippy-test-run/sources/stable/reg/tacho/0.4.2/Cargo.toml
[INFO] started frobbing tacho-0.4.2
[INFO] finished frobbing tacho-0.4.2
[INFO] frobbed toml for tacho-0.4.2 written to work/ex/clippy-test-run/sources/stable+rustflags=-Dclippy%3A%3Ainto_iter_on_array/reg/tacho/0.4.2/Cargo.toml
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+stable" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+stable" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+stable" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+stable" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] linting tacho-0.4.2 against stable for clippy-test-run
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/clippy-test-run/worker-6/stable:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/clippy-test-run/sources/stable/reg/tacho/0.4.2:/opt/crater/workdir:ro,Z" "-v" "/mnt/big/crater/work/local/cargo-home:/opt/crater/cargo-home:ro,Z" "-v" "/mnt/big/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" "+stable" "clippy" "--frozen" "--all" "--all-targets"`
[INFO] [stdout] c3117c96052a80c686165d9ce1ced992d47bb87745651f133edca7aa0d97713e
[INFO] running `"docker" "start" "-a" "c3117c96052a80c686165d9ce1ced992d47bb87745651f133edca7aa0d97713e"`
[INFO] [stderr]     Checking env_logger v0.4.3
[INFO] [stderr]     Checking hdrsample v3.0.0
[INFO] [stderr]     Checking pretty_env_logger v0.1.1
[INFO] [stderr]     Checking tacho v0.4.2 (/opt/crater/workdir)
[INFO] [stderr] warning: casting u32 to u64 may become silently lossy if types change
[INFO] [stderr]   --> src/timing.rs:16:45
[INFO] [stderr]    |
[INFO] [stderr] 16 |         self.as_secs() as u64 * 1_000_000 + self.subsec_nanos() as u64 / 1_000
[INFO] [stderr]    |                                             ^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try: `u64::from(self.subsec_nanos())`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(clippy::cast_lossless)] on by default
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#cast_lossless
[INFO] [stderr] 
[INFO] [stderr] warning: casting u32 to u64 may become silently lossy if types change
[INFO] [stderr]   --> src/timing.rs:19:41
[INFO] [stderr]    |
[INFO] [stderr] 19 |         self.as_secs() as u64 * 1_000 + self.subsec_nanos() as u64 / 1_000_000
[INFO] [stderr]    |                                         ^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try: `u64::from(self.subsec_nanos())`
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#cast_lossless
[INFO] [stderr] 
[INFO] [stderr] warning: using `println!("")`
[INFO] [stderr]   --> examples/simple.rs:24:17
[INFO] [stderr]    |
[INFO] [stderr] 24 |                 println!("");
[INFO] [stderr]    |                 ^^^^^^^^^^^^ help: replace it with: `println!()`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(clippy::println_empty_string)] on by default
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#println_empty_string
[INFO] [stderr] 
[INFO] [stderr] error[E0554]: #![feature] may not be used on the stable release channel
[INFO] [stderr]   --> src/lib.rs:16:19
[INFO] [stderr]    |
[INFO] [stderr] 16 | #![cfg_attr(test, feature(test))]
[INFO] [stderr]    |                   ^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to previous error
[INFO] [stderr] 
[INFO] [stderr] For more information about this error, try `rustc --explain E0554`.
[INFO] [stderr] error: Could not compile `tacho`.
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] warning: use of deprecated item 'futures::BoxFuture': removed without replacement, recommended to use a local extension trait or function if needed, more details in https://github.com/rust-lang-nursery/futures-rs/issues/228
[INFO] [stderr]   --> examples/multithread.rs:11:15
[INFO] [stderr]    |
[INFO] [stderr] 11 | use futures::{BoxFuture, Future, Stream};
[INFO] [stderr]    |               ^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(deprecated)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'futures::BoxFuture': removed without replacement, recommended to use a local extension trait or function if needed, more details in https://github.com/rust-lang-nursery/futures-rs/issues/228
[INFO] [stderr]   --> examples/multithread.rs:65:75
[INFO] [stderr]    |
[INFO] [stderr] 65 | fn reporter<D>(interval: Duration, done: D, reporter: tacho::Reporter) -> BoxFuture<(), ()>
[INFO] [stderr]    |                                                                           ^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'futures::BoxFuture': removed without replacement, recommended to use a local extension trait or function if needed, more details in https://github.com/rust-lang-nursery/futures-rs/issues/228
[INFO] [stderr]   --> examples/simple.rs:33:38
[INFO] [stderr]    |
[INFO] [stderr] 33 | fn do_work(metrics: tacho::Scope) -> future::BoxFuture<(), ()> {
[INFO] [stderr]    |                                      ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(deprecated)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'futures::Future::boxed': removed without replacement, recommended to use a local extension trait or function if needed, more details in https://github.com/rust-lang-nursery/futures-rs/issues/228
[INFO] [stderr]   --> examples/multithread.rs:80:55
[INFO] [stderr]    |
[INFO] [stderr] 80 |     periodic.select(done).map(|_| {}).map_err(|_| {}).boxed()
[INFO] [stderr]    |                                                       ^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'futures::Future::boxed': removed without replacement, recommended to use a local extension trait or function if needed, more details in https://github.com/rust-lang-nursery/futures-rs/issues/228
[INFO] [stderr]   --> examples/simple.rs:52:22
[INFO] [stderr]    |
[INFO] [stderr] 52 |     work.map(|_| {}).boxed()
[INFO] [stderr]    |                      ^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: identical conversion
[INFO] [stderr]   --> examples/simple.rs:35:37
[INFO] [stderr]    |
[INFO] [stderr] 35 |     let iter_time_us = metrics.stat("iter_time_us".into());
[INFO] [stderr]    |                                     ^^^^^^^^^^^^^^^^^^^^^ help: consider removing `.into()`: `"iter_time_us"`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(clippy::identity_conversion)] on by default
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#identity_conversion
[INFO] [stderr] 
[INFO] [stderr] warning: identical conversion
[INFO] [stderr]   --> examples/multithread.rs:37:47
[INFO] [stderr]    |
[INFO] [stderr] 37 |         let metrics = metrics.clone().labeled("thread".into(), format!("{}", i));
[INFO] [stderr]    |                                               ^^^^^^^^^^^^^^^ help: consider removing `.into()`: `"thread"`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(clippy::identity_conversion)] on by default
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#identity_conversion
[INFO] [stderr] 
[INFO] [stderr] warning: identical conversion
[INFO] [stderr]   --> examples/multithread.rs:38:44
[INFO] [stderr]    |
[INFO] [stderr] 38 |         let loop_counter = metrics.counter("loop_counter".into());
[INFO] [stderr]    |                                            ^^^^^^^^^^^^^^^^^^^^^ help: consider removing `.into()`: `"loop_counter"`
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#identity_conversion
[INFO] [stderr] 
[INFO] [stderr] warning: identical conversion
[INFO] [stderr]   --> examples/multithread.rs:39:42
[INFO] [stderr]    |
[INFO] [stderr] 39 |         let current_iter = metrics.gauge("current_iter".into());
[INFO] [stderr]    |                                          ^^^^^^^^^^^^^^^^^^^^^ help: consider removing `.into()`: `"current_iter"`
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#identity_conversion
[INFO] [stderr] 
[INFO] [stderr] error: build failed
[INFO] running `"docker" "inspect" "c3117c96052a80c686165d9ce1ced992d47bb87745651f133edca7aa0d97713e"`
[INFO] running `"docker" "rm" "-f" "c3117c96052a80c686165d9ce1ced992d47bb87745651f133edca7aa0d97713e"`
[INFO] [stdout] c3117c96052a80c686165d9ce1ced992d47bb87745651f133edca7aa0d97713e