[INFO] crate tacho 0.4.2 is already in cache
[INFO] extracting crate tacho 0.4.2 into work/ex/beta-1.37-6/sources/1.36.0/reg/tacho/0.4.2
[INFO] extracting crate tacho 0.4.2 into work/ex/beta-1.37-6/sources/beta-2019-07-23/reg/tacho/0.4.2
[INFO] validating manifest of tacho-0.4.2 on toolchain 1.36.0
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.36.0" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of tacho-0.4.2 on toolchain beta-2019-07-23
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-07-23" "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/beta-1.37-6/sources/1.36.0/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/beta-1.37-6/sources/beta-2019-07-23/reg/tacho/0.4.2/Cargo.toml
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.36.0" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-07-23" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.36.0" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-07-23" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] testing tacho-0.4.2 against 1.36.0 for beta-1.37-6
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-3/1.36.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.37-6/sources/1.36.0/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=warn" "-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" "+1.36.0" "build" "--frozen"`
[INFO] [stdout] 8f6241edafb9d5c32ddffe01ff94251f18f655923a5d4f1bc3b0d7eaac95ba7b
[INFO] running `"docker" "start" "-a" "8f6241edafb9d5c32ddffe01ff94251f18f655923a5d4f1bc3b0d7eaac95ba7b"`
[INFO] [stderr]    Compiling hdrsample v3.0.0
[INFO] [stderr]    Compiling tacho v0.4.2 (/opt/crater/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.80s
[INFO] running `"docker" "inspect" "8f6241edafb9d5c32ddffe01ff94251f18f655923a5d4f1bc3b0d7eaac95ba7b"`
[INFO] running `"docker" "rm" "-f" "8f6241edafb9d5c32ddffe01ff94251f18f655923a5d4f1bc3b0d7eaac95ba7b"`
[INFO] [stdout] 8f6241edafb9d5c32ddffe01ff94251f18f655923a5d4f1bc3b0d7eaac95ba7b
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-3/1.36.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.37-6/sources/1.36.0/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=warn" "-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" "+1.36.0" "test" "--frozen" "--no-run"`
[INFO] [stdout] 2080c0fac3444c0fff4bab9d9f9328d5f4bb7108933e155b940bc1009685c763
[INFO] running `"docker" "start" "-a" "2080c0fac3444c0fff4bab9d9f9328d5f4bb7108933e155b940bc1009685c763"`
[INFO] [stderr]    Compiling pretty_env_logger v0.1.1
[INFO] [stderr]    Compiling tacho v0.4.2 (/opt/crater/workdir)
[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/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::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::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: 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] error: build failed
[INFO] running `"docker" "inspect" "2080c0fac3444c0fff4bab9d9f9328d5f4bb7108933e155b940bc1009685c763"`
[INFO] running `"docker" "rm" "-f" "2080c0fac3444c0fff4bab9d9f9328d5f4bb7108933e155b940bc1009685c763"`
[INFO] [stdout] 2080c0fac3444c0fff4bab9d9f9328d5f4bb7108933e155b940bc1009685c763