[INFO] crate dominator 0.5.0 is already in cache
[INFO] extracting crate dominator 0.5.0 into work/ex/beta-1.38-1/sources/1.37.0/reg/dominator/0.5.0
[INFO] extracting crate dominator 0.5.0 into work/ex/beta-1.38-1/sources/beta-2019-08-13/reg/dominator/0.5.0
[INFO] validating manifest of dominator-0.5.0 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 dominator-0.5.0 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 dominator-0.5.0
[INFO] finished frobbing dominator-0.5.0
[INFO] frobbed toml for dominator-0.5.0 written to work/ex/beta-1.38-1/sources/1.37.0/reg/dominator/0.5.0/Cargo.toml
[INFO] started frobbing dominator-0.5.0
[INFO] finished frobbing dominator-0.5.0
[INFO] frobbed toml for dominator-0.5.0 written to work/ex/beta-1.38-1/sources/beta-2019-08-13/reg/dominator/0.5.0/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] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-08-13" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] testing dominator-0.5.0 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-4/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/dominator/0.5.0:/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] 543bb2293f7bab1bc2e7e5b1c564b5f986fc3ce43bd8ccbd94c94a425e97eda1
[INFO] running `"docker" "start" "-a" "543bb2293f7bab1bc2e7e5b1c564b5f986fc3ce43bd8ccbd94c94a425e97eda1"`
[INFO] [stderr]    Compiling syn v1.0.3
[INFO] [stderr]    Compiling wasm-bindgen-shared v0.2.50
[INFO] [stderr]    Compiling bumpalo v2.6.0
[INFO] [stderr]    Compiling wasm-bindgen v0.2.50
[INFO] [stderr]    Compiling sourcefile v0.1.4
[INFO] [stderr]    Compiling futures-core-preview v0.3.0-alpha.18
[INFO] [stderr]    Compiling discard v1.0.4
[INFO] [stderr]    Compiling weedle v0.10.0
[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-signals v0.3.7
[INFO] [stderr] error[E0599]: no function or associated item named `into_waker` found for type `dyn futures_util::task::arc_wake::ArcWake` in the current scope
[INFO] [stderr]    --> /opt/crater/cargo-home/registry/src/github.com-1ecc6299db9ec823/futures-signals-0.3.7/src/signal/broadcaster.rs:101:30
[INFO] [stderr]     |
[INFO] [stderr] 101 |         let waker = ArcWake::into_waker(notifier);
[INFO] [stderr]     |                              ^^^^^^^^^^ function or associated item not found in `dyn futures_util::task::arc_wake::ArcWake`
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to previous error
[INFO] [stderr] 
[INFO] [stderr] For more information about this error, try `rustc --explain E0599`.
[INFO] [stderr] error: Could not compile `futures-signals`.
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: build failed
[INFO] running `"docker" "inspect" "543bb2293f7bab1bc2e7e5b1c564b5f986fc3ce43bd8ccbd94c94a425e97eda1"`
[INFO] running `"docker" "rm" "-f" "543bb2293f7bab1bc2e7e5b1c564b5f986fc3ce43bd8ccbd94c94a425e97eda1"`
[INFO] [stdout] 543bb2293f7bab1bc2e7e5b1c564b5f986fc3ce43bd8ccbd94c94a425e97eda1