[INFO] crate associated-async-io 1.0.1 is already in cache
[INFO] extracting crate associated-async-io 1.0.1 into work/ex/beta-1.38-1/sources/1.37.0/reg/associated-async-io/1.0.1
[INFO] extracting crate associated-async-io 1.0.1 into work/ex/beta-1.38-1/sources/beta-2019-08-13/reg/associated-async-io/1.0.1
[INFO] validating manifest of associated-async-io-1.0.1 on toolchain 1.37.0
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.37.0" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of associated-async-io-1.0.1 on toolchain beta-2019-08-13
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-08-13" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing associated-async-io-1.0.1
[INFO] finished frobbing associated-async-io-1.0.1
[INFO] frobbed toml for associated-async-io-1.0.1 written to work/ex/beta-1.38-1/sources/1.37.0/reg/associated-async-io/1.0.1/Cargo.toml
[INFO] started frobbing associated-async-io-1.0.1
[INFO] finished frobbing associated-async-io-1.0.1
[INFO] frobbed toml for associated-async-io-1.0.1 written to work/ex/beta-1.38-1/sources/beta-2019-08-13/reg/associated-async-io/1.0.1/Cargo.toml
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.37.0" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-08-13" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.37.0" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-08-13" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] testing associated-async-io-1.0.1 against beta-2019-08-13 for beta-1.38-1
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-3/beta-2019-08-13:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/beta-2019-08-13/reg/associated-async-io/1.0.1:/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" "+beta-2019-08-13" "build" "--frozen"`
[INFO] [stdout] e7a88895458cec1536c5fcf7e360d23cdd35ca2d926368fc7178e3a9867ee6f6
[INFO] running `"docker" "start" "-a" "e7a88895458cec1536c5fcf7e360d23cdd35ca2d926368fc7178e3a9867ee6f6"`
[INFO] [stderr]    Compiling associated-async-io v1.0.1 (/opt/crater/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.17s
[INFO] running `"docker" "inspect" "e7a88895458cec1536c5fcf7e360d23cdd35ca2d926368fc7178e3a9867ee6f6"`
[INFO] running `"docker" "rm" "-f" "e7a88895458cec1536c5fcf7e360d23cdd35ca2d926368fc7178e3a9867ee6f6"`
[INFO] [stdout] e7a88895458cec1536c5fcf7e360d23cdd35ca2d926368fc7178e3a9867ee6f6
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-3/beta-2019-08-13:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/beta-2019-08-13/reg/associated-async-io/1.0.1:/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" "+beta-2019-08-13" "test" "--frozen" "--no-run"`
[INFO] [stdout] 6410f966de4a90a8766ba1585f276baa56c8a70b152c705f0e277a02afb12845
[INFO] running `"docker" "start" "-a" "6410f966de4a90a8766ba1585f276baa56c8a70b152c705f0e277a02afb12845"`
[INFO] [stderr]    Compiling futures-sink-preview v0.3.0-alpha.18
[INFO] [stderr]    Compiling futures-channel-preview v0.3.0-alpha.18
[INFO] [stderr]    Compiling futures-util-preview v0.3.0-alpha.18
[INFO] [stderr]    Compiling futures-executor-preview v0.3.0-alpha.18
[INFO] [stderr]    Compiling futures-preview v0.3.0-alpha.18
[INFO] [stderr]    Compiling associated-async-io v1.0.1 (/opt/crater/workdir)
[INFO] [stderr] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stderr]  --> examples/iterator.rs:1:1
[INFO] [stderr]   |
[INFO] [stderr] 1 | #![feature(async_await)]
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> examples/iterator.rs:23:24
[INFO] [stderr]    |
[INFO] [stderr] 23 |     type Fut = Pin<Box<Future<Output = Option<Self::Item>>>>;
[INFO] [stderr]    |                        ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn Future<Output = Option<Self::Item>>`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(bare_trait_objects)]` on by default
[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 `associated-async-io`.
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: build failed
[INFO] running `"docker" "inspect" "6410f966de4a90a8766ba1585f276baa56c8a70b152c705f0e277a02afb12845"`
[INFO] running `"docker" "rm" "-f" "6410f966de4a90a8766ba1585f276baa56c8a70b152c705f0e277a02afb12845"`
[INFO] [stdout] 6410f966de4a90a8766ba1585f276baa56c8a70b152c705f0e277a02afb12845