[INFO] crate futures-util-preview 0.3.0-alpha.17 is already in cache
[INFO] extracting crate futures-util-preview 0.3.0-alpha.17 into work/ex/pr-63376/sources/master#60960a260f7b5c695fd0717311d72ce62dd4eb43/reg/futures-util-preview/0.3.0-alpha.17
[INFO] extracting crate futures-util-preview 0.3.0-alpha.17 into work/ex/pr-63376/sources/try#266783e4e09e4e9d5307c1c8e695659c58bbcac7/reg/futures-util-preview/0.3.0-alpha.17
[INFO] validating manifest of futures-util-preview-0.3.0-alpha.17 on toolchain master#60960a260f7b5c695fd0717311d72ce62dd4eb43
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+60960a260f7b5c695fd0717311d72ce62dd4eb43-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of futures-util-preview-0.3.0-alpha.17 on toolchain try#266783e4e09e4e9d5307c1c8e695659c58bbcac7
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+266783e4e09e4e9d5307c1c8e695659c58bbcac7-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing futures-util-preview-0.3.0-alpha.17
[INFO] finished frobbing futures-util-preview-0.3.0-alpha.17
[INFO] frobbed toml for futures-util-preview-0.3.0-alpha.17 written to work/ex/pr-63376/sources/master#60960a260f7b5c695fd0717311d72ce62dd4eb43/reg/futures-util-preview/0.3.0-alpha.17/Cargo.toml
[INFO] started frobbing futures-util-preview-0.3.0-alpha.17
[INFO] finished frobbing futures-util-preview-0.3.0-alpha.17
[INFO] frobbed toml for futures-util-preview-0.3.0-alpha.17 written to work/ex/pr-63376/sources/try#266783e4e09e4e9d5307c1c8e695659c58bbcac7/reg/futures-util-preview/0.3.0-alpha.17/Cargo.toml
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+60960a260f7b5c695fd0717311d72ce62dd4eb43-alt" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+266783e4e09e4e9d5307c1c8e695659c58bbcac7-alt" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+60960a260f7b5c695fd0717311d72ce62dd4eb43-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+266783e4e09e4e9d5307c1c8e695659c58bbcac7-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] checking futures-util-preview-0.3.0-alpha.17 against try#266783e4e09e4e9d5307c1c8e695659c58bbcac7 for pr-63376
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-63376/worker-6/try#266783e4e09e4e9d5307c1c8e695659c58bbcac7:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-63376/sources/try#266783e4e09e4e9d5307c1c8e695659c58bbcac7/reg/futures-util-preview/0.3.0-alpha.17:/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" "+266783e4e09e4e9d5307c1c8e695659c58bbcac7-alt" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stdout] 07fa2ebe8a2ddb452b3d8cf2ceea3894d26f5b74f9b63deb2e6c61515df5688a
[INFO] running `"docker" "start" "-a" "07fa2ebe8a2ddb452b3d8cf2ceea3894d26f5b74f9b63deb2e6c61515df5688a"`
[INFO] [stderr]     Checking futures-util-preview v0.3.0-alpha.17 (/opt/crater/workdir)
[INFO] [stderr] error[E0433]: failed to resolve: use of undeclared type or module `futures`
[INFO] [stderr]  --> benches/futures_unordered.rs:6:5
[INFO] [stderr]   |
[INFO] [stderr] 6 | use futures::channel::oneshot;
[INFO] [stderr]   |     ^^^^^^^ use of undeclared type or module `futures`
[INFO] [stderr] 
[INFO] [stderr] error[E0433]: failed to resolve: use of undeclared type or module `futures`
[INFO] [stderr]  --> benches/futures_unordered.rs:7:5
[INFO] [stderr]   |
[INFO] [stderr] 7 | use futures::executor::block_on;
[INFO] [stderr]   |     ^^^^^^^ use of undeclared type or module `futures`
[INFO] [stderr] 
[INFO] [stderr] error[E0433]: failed to resolve: use of undeclared type or module `futures`
[INFO] [stderr]  --> benches/futures_unordered.rs:9:5
[INFO] [stderr]   |
[INFO] [stderr] 9 | use futures::stream::{StreamExt, FuturesUnordered};
[INFO] [stderr]   |     ^^^^^^^ use of undeclared type or module `futures`
[INFO] [stderr] 
[INFO] [stderr] error[E0433]: failed to resolve: use of undeclared type or module `futures`
[INFO] [stderr]   --> benches/futures_unordered.rs:10:5
[INFO] [stderr]    |
[INFO] [stderr] 10 | use futures::task::Poll;
[INFO] [stderr]    |     ^^^^^^^ use of undeclared type or module `futures`
[INFO] [stderr] 
[INFO] [stderr] error[E0432]: unresolved import `futures`
[INFO] [stderr]  --> benches/futures_unordered.rs:8:5
[INFO] [stderr]   |
[INFO] [stderr] 8 | use futures::future;
[INFO] [stderr]   |     ^^^^^^^ use of undeclared type or module `futures`
[INFO] [stderr] 
[INFO] [stderr] error[E0433]: failed to resolve: use of undeclared type or module `FuturesUnordered`
[INFO] [stderr]   --> benches/futures_unordered.rs:20:23
[INFO] [stderr]    |
[INFO] [stderr] 20 |         let mut rxs = FuturesUnordered::new();
[INFO] [stderr]    |                       ^^^^^^^^^^^^^^^^ use of undeclared type or module `FuturesUnordered`
[INFO] [stderr] 
[INFO] [stderr] error[E0433]: failed to resolve: use of undeclared type or module `oneshot`
[INFO] [stderr]   --> benches/futures_unordered.rs:23:28
[INFO] [stderr]    |
[INFO] [stderr] 23 |             let (tx, rx) = oneshot::channel();
[INFO] [stderr]    |                            ^^^^^^^ use of undeclared type or module `oneshot`
[INFO] [stderr] 
[INFO] [stderr] error[E0433]: failed to resolve: use of undeclared type or module `Poll`
[INFO] [stderr]   --> benches/futures_unordered.rs:36:24
[INFO] [stderr]    |
[INFO] [stderr] 36 |                 if let Poll::Ready(None) = rxs.poll_next_unpin(cx) {
[INFO] [stderr]    |                        ^^^^ use of undeclared type or module `Poll`
[INFO] [stderr] 
[INFO] [stderr] error[E0433]: failed to resolve: use of undeclared type or module `Poll`
[INFO] [stderr]   --> benches/futures_unordered.rs:40:13
[INFO] [stderr]    |
[INFO] [stderr] 40 |             Poll::Ready(())
[INFO] [stderr]    |             ^^^^ use of undeclared type or module `Poll`
[INFO] [stderr] 
[INFO] [stderr] error[E0425]: cannot find function `block_on` in this scope
[INFO] [stderr]   --> benches/futures_unordered.rs:34:9
[INFO] [stderr]    |
[INFO] [stderr] 34 |         block_on(future::poll_fn(move |cx| {
[INFO] [stderr]    |         ^^^^^^^^ not found in this scope
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `futures::channel::oneshot`
[INFO] [stderr]  --> benches/futures_unordered.rs:6:5
[INFO] [stderr]   |
[INFO] [stderr] 6 | use futures::channel::oneshot;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `futures::executor::block_on`
[INFO] [stderr]  --> benches/futures_unordered.rs:7:5
[INFO] [stderr]   |
[INFO] [stderr] 7 | use futures::executor::block_on;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused imports: `FuturesUnordered`, `StreamExt`
[INFO] [stderr]  --> benches/futures_unordered.rs:9:23
[INFO] [stderr]   |
[INFO] [stderr] 9 | use futures::stream::{StreamExt, FuturesUnordered};
[INFO] [stderr]   |                       ^^^^^^^^^  ^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `futures::task::Poll`
[INFO] [stderr]   --> benches/futures_unordered.rs:10:5
[INFO] [stderr]    |
[INFO] [stderr] 10 | use futures::task::Poll;
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to 10 previous errors
[INFO] [stderr] 
[INFO] [stderr] Some errors have detailed explanations: E0425, E0432, E0433.
[INFO] [stderr] For more information about an error, try `rustc --explain E0425`.
[INFO] [stderr] error: Could not compile `futures-util-preview`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `"docker" "inspect" "07fa2ebe8a2ddb452b3d8cf2ceea3894d26f5b74f9b63deb2e6c61515df5688a"`
[INFO] running `"docker" "rm" "-f" "07fa2ebe8a2ddb452b3d8cf2ceea3894d26f5b74f9b63deb2e6c61515df5688a"`
[INFO] [stdout] 07fa2ebe8a2ddb452b3d8cf2ceea3894d26f5b74f9b63deb2e6c61515df5688a