[INFO] fetching crate futures-io-preview 0.3.0-alpha.16...
[INFO] extracting crate futures-io-preview 0.3.0-alpha.16 into work/ex/pr-62133/sources/master#5f9c0448dde167128d668da4555879f64e56af1d/reg/futures-io-preview/0.3.0-alpha.16
[INFO] extracting crate futures-io-preview 0.3.0-alpha.16 into work/ex/pr-62133/sources/try#8ec8125bea94852768b56958f05da47666c21ab0/reg/futures-io-preview/0.3.0-alpha.16
[INFO] validating manifest of futures-io-preview-0.3.0-alpha.16 on toolchain master#5f9c0448dde167128d668da4555879f64e56af1d
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+5f9c0448dde167128d668da4555879f64e56af1d-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of futures-io-preview-0.3.0-alpha.16 on toolchain try#8ec8125bea94852768b56958f05da47666c21ab0
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+8ec8125bea94852768b56958f05da47666c21ab0-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing futures-io-preview-0.3.0-alpha.16
[INFO] finished frobbing futures-io-preview-0.3.0-alpha.16
[INFO] frobbed toml for futures-io-preview-0.3.0-alpha.16 written to work/ex/pr-62133/sources/master#5f9c0448dde167128d668da4555879f64e56af1d/reg/futures-io-preview/0.3.0-alpha.16/Cargo.toml
[INFO] started frobbing futures-io-preview-0.3.0-alpha.16
[INFO] finished frobbing futures-io-preview-0.3.0-alpha.16
[INFO] frobbed toml for futures-io-preview-0.3.0-alpha.16 written to work/ex/pr-62133/sources/try#8ec8125bea94852768b56958f05da47666c21ab0/reg/futures-io-preview/0.3.0-alpha.16/Cargo.toml
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+5f9c0448dde167128d668da4555879f64e56af1d-alt" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+8ec8125bea94852768b56958f05da47666c21ab0-alt" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+5f9c0448dde167128d668da4555879f64e56af1d-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+8ec8125bea94852768b56958f05da47666c21ab0-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] checking futures-io-preview-0.3.0-alpha.16 against master#5f9c0448dde167128d668da4555879f64e56af1d for pr-62133
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-62133/worker-0/master#5f9c0448dde167128d668da4555879f64e56af1d:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-62133/sources/master#5f9c0448dde167128d668da4555879f64e56af1d/reg/futures-io-preview/0.3.0-alpha.16:/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" "+5f9c0448dde167128d668da4555879f64e56af1d-alt" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stdout] b9a3650d649a09c01a1a4e1b104c1068601e84c53ea01d1d5689618caee3c103
[INFO] running `"docker" "start" "-a" "b9a3650d649a09c01a1a4e1b104c1068601e84c53ea01d1d5689618caee3c103"`
[INFO] [stderr]     Checking futures-io-preview v0.3.0-alpha.16 (/opt/crater/workdir)
[INFO] [stderr] error[E0432]: unresolved import `assert_matches`
[INFO] [stderr]  --> tests/cursor.rs:1:5
[INFO] [stderr]   |
[INFO] [stderr] 1 | use assert_matches::assert_matches;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^ use of undeclared type or module `assert_matches`
[INFO] [stderr] 
[INFO] [stderr] error[E0433]: failed to resolve: use of undeclared type or module `futures`
[INFO] [stderr]  --> tests/cursor.rs:3:5
[INFO] [stderr]   |
[INFO] [stderr] 3 | use futures::future::lazy;
[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]  --> tests/cursor.rs:4:5
[INFO] [stderr]   |
[INFO] [stderr] 4 | use futures::io::AsyncWrite;
[INFO] [stderr]   |     ^^^^^^^ use of undeclared type or module `futures`
[INFO] [stderr] 
[INFO] [stderr] error[E0432]: unresolved import `futures`
[INFO] [stderr]  --> tests/cursor.rs:2:5
[INFO] [stderr]   |
[INFO] [stderr] 2 | use futures::Poll;
[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]   --> tests/cursor.rs:11:5
[INFO] [stderr]    |
[INFO] [stderr] 11 |     futures::executor::block_on(lazy(|cx| {
[INFO] [stderr]    |     ^^^^^^^ use of undeclared type or module `futures`
[INFO] [stderr] 
[INFO] [stderr] error: cannot determine resolution for the macro `assert_matches`
[INFO] [stderr]   --> tests/cursor.rs:12:9
[INFO] [stderr]    |
[INFO] [stderr] 12 |         assert_matches!(Pin::new(&mut cursor).poll_write(cx, &[1, 2]), Poll::Ready(Ok(2)));
[INFO] [stderr]    |         ^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: import resolution is stuck, try simplifying macro imports
[INFO] [stderr] 
[INFO] [stderr] error: cannot determine resolution for the macro `assert_matches`
[INFO] [stderr]   --> tests/cursor.rs:13:9
[INFO] [stderr]    |
[INFO] [stderr] 13 |         assert_matches!(Pin::new(&mut cursor).poll_write(cx, &[3, 4]), Poll::Ready(Ok(2)));
[INFO] [stderr]    |         ^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: import resolution is stuck, try simplifying macro imports
[INFO] [stderr] 
[INFO] [stderr] error: cannot determine resolution for the macro `assert_matches`
[INFO] [stderr]   --> tests/cursor.rs:14:9
[INFO] [stderr]    |
[INFO] [stderr] 14 |         assert_matches!(Pin::new(&mut cursor).poll_write(cx, &[5, 6]), Poll::Ready(Ok(1)));
[INFO] [stderr]    |         ^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: import resolution is stuck, try simplifying macro imports
[INFO] [stderr] 
[INFO] [stderr] error: cannot determine resolution for the macro `assert_matches`
[INFO] [stderr]   --> tests/cursor.rs:15:9
[INFO] [stderr]    |
[INFO] [stderr] 15 |         assert_matches!(Pin::new(&mut cursor).poll_write(cx, &[6, 7]), Poll::Ready(Ok(0)));
[INFO] [stderr]    |         ^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: import resolution is stuck, try simplifying macro imports
[INFO] [stderr] 
[INFO] [stderr] error[E0425]: cannot find function `lazy` in this scope
[INFO] [stderr]   --> tests/cursor.rs:11:33
[INFO] [stderr]    |
[INFO] [stderr] 11 |     futures::executor::block_on(lazy(|cx| {
[INFO] [stderr]    |                                 ^^^^ not found in this scope
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `futures::future::lazy`
[INFO] [stderr]  --> tests/cursor.rs:3:5
[INFO] [stderr]   |
[INFO] [stderr] 3 | use futures::future::lazy;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: #[warn(unused_imports)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `futures::io::AsyncWrite`
[INFO] [stderr]  --> tests/cursor.rs:4:5
[INFO] [stderr]   |
[INFO] [stderr] 4 | use futures::io::AsyncWrite;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::pin::Pin`
[INFO] [stderr]  --> tests/cursor.rs:6:5
[INFO] [stderr]   |
[INFO] [stderr] 6 | use std::pin::Pin;
[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-io-preview`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `"docker" "inspect" "b9a3650d649a09c01a1a4e1b104c1068601e84c53ea01d1d5689618caee3c103"`
[INFO] running `"docker" "rm" "-f" "b9a3650d649a09c01a1a4e1b104c1068601e84c53ea01d1d5689618caee3c103"`
[INFO] [stdout] b9a3650d649a09c01a1a4e1b104c1068601e84c53ea01d1d5689618caee3c103