[INFO] fetching crate futures-preview 0.3.0-alpha.18... [INFO] checking futures-preview-0.3.0-alpha.18 against master#2748a9fd93dd1a00a4521f4f16de5befbf77f6cd for pr-62262-1 [INFO] extracting crate futures-preview 0.3.0-alpha.18 into /workspace/builds/worker-4/source [INFO] validating manifest of crates.io crate futures-preview 0.3.0-alpha.18 on toolchain 2748a9fd93dd1a00a4521f4f16de5befbf77f6cd [INFO] running `"/workspace/cargo-home/bin/cargo" "+2748a9fd93dd1a00a4521f4f16de5befbf77f6cd" "read-manifest" "--manifest-path" "Cargo.toml"` [INFO] started tweaking crates.io crate futures-preview 0.3.0-alpha.18 [INFO] finished tweaking crates.io crate futures-preview 0.3.0-alpha.18 [INFO] tweaked toml for crates.io crate futures-preview 0.3.0-alpha.18 written to /workspace/builds/worker-4/source/Cargo.toml [INFO] running `"/workspace/cargo-home/bin/cargo" "+2748a9fd93dd1a00a4521f4f16de5befbf77f6cd" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"` [INFO] running `"/workspace/cargo-home/bin/cargo" "+2748a9fd93dd1a00a4521f4f16de5befbf77f6cd" "fetch" "--locked" "--manifest-path" "Cargo.toml"` [INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "MAP_USER_ID=0" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--network" "none" "rustops/crates-build-env" "/opt/rustwide/cargo-home/bin/cargo" "+2748a9fd93dd1a00a4521f4f16de5befbf77f6cd" "check" "--frozen" "--all" "--all-targets"` [INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap. [INFO] [stdout] 10aa82d8e4a72a053ba6b007041282c725aeda7203143b1b7a5a80b8883d80e9 [INFO] running `"docker" "start" "-a" "10aa82d8e4a72a053ba6b007041282c725aeda7203143b1b7a5a80b8883d80e9"` [INFO] [stderr] Checking futures-executor-preview v0.3.0-alpha.18 [INFO] [stderr] Checking futures-preview v0.3.0-alpha.18 (/opt/rustwide/workdir) [INFO] [stderr] error[E0433]: failed to resolve: use of undeclared type or module `futures_test` [INFO] [stderr] --> tests/io_buf_writer.rs:5:5 [INFO] [stderr] | [INFO] [stderr] 5 | use futures_test::task::noop_context; [INFO] [stderr] | ^^^^^^^^^^^^ use of undeclared type or module `futures_test` [INFO] [stderr] [INFO] [stderr] error[E0425]: cannot find function `noop_context` in this scope [INFO] [stderr] --> tests/io_buf_writer.rs:112:18 [INFO] [stderr] | [INFO] [stderr] 112 | let mut cx = noop_context(); [INFO] [stderr] | ^^^^^^^^^^^^ not found in this scope [INFO] [stderr] [INFO] [stderr] error[E0433]: failed to resolve: use of undeclared type or module `futures_test` [INFO] [stderr] --> tests/io_read_line.rs:6:5 [INFO] [stderr] | [INFO] [stderr] 6 | use futures_test::io::AsyncReadTestExt; [INFO] [stderr] | ^^^^^^^^^^^^ use of undeclared type or module `futures_test` [INFO] [stderr] [INFO] [stderr] error[E0433]: failed to resolve: use of undeclared type or module `futures_test` [INFO] [stderr] --> tests/io_read_line.rs:7:5 [INFO] [stderr] | [INFO] [stderr] 7 | use futures_test::task::noop_context; [INFO] [stderr] | ^^^^^^^^^^^^ use of undeclared type or module `futures_test` [INFO] [stderr] [INFO] [stderr] error[E0433]: failed to resolve: use of undeclared type or module `futures_test` [INFO] [stderr] --> tests/io_lines.rs:6:5 [INFO] [stderr] | [INFO] [stderr] 6 | use futures_test::io::AsyncReadTestExt; [INFO] [stderr] | ^^^^^^^^^^^^ use of undeclared type or module `futures_test` [INFO] [stderr] [INFO] [stderr] error[E0433]: failed to resolve: use of undeclared type or module `futures_test` [INFO] [stderr] --> tests/io_lines.rs:7:5 [INFO] [stderr] | [INFO] [stderr] 7 | use futures_test::task::noop_context; [INFO] [stderr] | ^^^^^^^^^^^^ use of undeclared type or module `futures_test` [INFO] [stderr] [INFO] [stderr] error[E0425]: cannot find function `noop_context` in this scope [INFO] [stderr] --> tests/io_read_line.rs:30:18 [INFO] [stderr] | [INFO] [stderr] 30 | let mut cx = noop_context(); [INFO] [stderr] | ^^^^^^^^^^^^ not found in this scope [INFO] [stderr] [INFO] [stderr] error[E0425]: cannot find function `noop_context` in this scope [INFO] [stderr] --> tests/io_lines.rs:31:18 [INFO] [stderr] | [INFO] [stderr] 31 | let mut cx = noop_context(); [INFO] [stderr] | ^^^^^^^^^^^^ not found in this scope [INFO] [stderr] [INFO] [stderr] error[E0433]: failed to resolve: use of undeclared type or module `futures_test` [INFO] [stderr] --> tests/ready_queue.rs:6:5 [INFO] [stderr] | [INFO] [stderr] 6 | use futures_test::task::noop_context; [INFO] [stderr] | ^^^^^^^^^^^^ use of undeclared type or module `futures_test` [INFO] [stderr] [INFO] [stderr] error[E0599]: no method named `interleave_pending` found for type `&'static [u8; 2]` in the current scope [INFO] [stderr] --> tests/io_read_line.rs:40:25 [INFO] [stderr] | [INFO] [stderr] 40 | let mut buf = b"12".interleave_pending(); [INFO] [stderr] | ^^^^^^^^^^^^^^^^^^ method not found in `&'static [u8; 2]` [INFO] [stderr] [INFO] [stderr] error[E0599]: no method named `interleave_pending` found for type `futures_util::try_stream::into_async_read::IntoAsyncRead>, fn(&[u8]) -> std::result::Result<&[u8], std::io::error::Error> {std::result::Result::<&[u8], std::io::error::Error>::Ok}>>` in the current scope [INFO] [stderr] --> tests/io_read_line.rs:48:10 [INFO] [stderr] | [INFO] [stderr] 48 | .interleave_pending(); [INFO] [stderr] | ^^^^^^^^^^^^^^^^^^ method not found in `futures_util::try_stream::into_async_read::IntoAsyncRead>, fn(&[u8]) -> std::result::Result<&[u8], std::io::error::Error> {std::result::Result::<&[u8], std::io::error::Error>::Ok}>>` [INFO] [stderr] [INFO] [stderr] error[E0425]: cannot find function `noop_context` in this scope [INFO] [stderr] --> tests/ready_queue.rs:83:27 [INFO] [stderr] | [INFO] [stderr] 83 | let cx = &mut noop_context(); [INFO] [stderr] | ^^^^^^^^^^^^ not found in this scope [INFO] [stderr] [INFO] [stderr] error: aborting due to 5 previous errors [INFO] [stderr] [INFO] [stderr] Some errors have detailed explanations: E0425, E0433, E0599. [INFO] [stderr] For more information about an error, try `rustc --explain E0425`. [INFO] [stderr] error: could not compile `futures-preview`. [INFO] [stderr] warning: build failed, waiting for other jobs to finish... [INFO] [stderr] error[E0599]: no method named `interleave_pending` found for type `futures_util::try_stream::into_async_read::IntoAsyncRead>, fn(&[u8]) -> std::result::Result<&[u8], std::io::error::Error> {std::result::Result::<&[u8], std::io::error::Error>::Ok}>>` in the current scope [INFO] [stderr] --> tests/io_lines.rs:50:10 [INFO] [stderr] | [INFO] [stderr] 50 | .interleave_pending(); [INFO] [stderr] | ^^^^^^^^^^^^^^^^^^ method not found in `futures_util::try_stream::into_async_read::IntoAsyncRead>, fn(&[u8]) -> std::result::Result<&[u8], std::io::error::Error> {std::result::Result::<&[u8], std::io::error::Error>::Ok}>>` [INFO] [stderr] [INFO] [stderr] error[E0599]: no method named `interleave_pending` found for type `futures_util::try_stream::into_async_read::IntoAsyncRead>, fn(&[u8]) -> std::result::Result<&[u8], std::io::error::Error> {std::result::Result::<&[u8], std::io::error::Error>::Ok}>>` in the current scope [INFO] [stderr] --> tests/io_lines.rs:58:10 [INFO] [stderr] | [INFO] [stderr] 58 | .interleave_pending(); [INFO] [stderr] | ^^^^^^^^^^^^^^^^^^ method not found in `futures_util::try_stream::into_async_read::IntoAsyncRead>, fn(&[u8]) -> std::result::Result<&[u8], std::io::error::Error> {std::result::Result::<&[u8], std::io::error::Error>::Ok}>>` [INFO] [stderr] [INFO] [stderr] error: aborting due to 5 previous errors [INFO] [stderr] [INFO] [stderr] Some errors have detailed explanations: E0425, E0433, E0599. [INFO] [stderr] For more information about an error, try `rustc --explain E0425`. [INFO] [stderr] error: could not compile `futures-preview`. [INFO] [stderr] warning: build failed, waiting for other jobs to finish... [INFO] [stderr] error: aborting due to 2 previous errors [INFO] [stderr] [INFO] [stderr] Some errors have detailed explanations: E0425, E0433. [INFO] [stderr] For more information about an error, try `rustc --explain E0425`. [INFO] [stderr] error: could not compile `futures-preview`. [INFO] [stderr] warning: build failed, waiting for other jobs to finish... [INFO] [stderr] warning: the feature `async_await` has been stable since 1.39.0 and no longer requires an attribute to enable [INFO] [stderr] --> tests/join_all.rs:1:12 [INFO] [stderr] | [INFO] [stderr] 1 | #![feature(async_await)] [INFO] [stderr] | ^^^^^^^^^^^ [INFO] [stderr] | [INFO] [stderr] = note: `#[warn(stable_features)]` on by default [INFO] [stderr] [INFO] [stderr] error: aborting due to 2 previous errors [INFO] [stderr] [INFO] [stderr] Some errors have detailed explanations: E0425, E0433. [INFO] [stderr] For more information about an error, try `rustc --explain E0425`. [INFO] [stderr] error: could not compile `futures-preview`. [INFO] [stderr] warning: build failed, waiting for other jobs to finish... [INFO] [stderr] error[E0433]: failed to resolve: use of undeclared type or module `futures_test` [INFO] [stderr] --> tests/eager_drop.rs:4:5 [INFO] [stderr] | [INFO] [stderr] 4 | use futures_test::future::FutureTestExt; [INFO] [stderr] | ^^^^^^^^^^^^ use of undeclared type or module `futures_test` [INFO] [stderr] [INFO] [stderr] error[E0432]: unresolved import `pin_utils` [INFO] [stderr] --> tests/eager_drop.rs:5:5 [INFO] [stderr] | [INFO] [stderr] 5 | use pin_utils::unsafe_pinned; [INFO] [stderr] | ^^^^^^^^^ use of undeclared type or module `pin_utils` [INFO] [stderr] [INFO] [stderr] error: cannot determine resolution for the macro `unsafe_pinned` [INFO] [stderr] --> tests/eager_drop.rs:51:5 [INFO] [stderr] | [INFO] [stderr] 51 | unsafe_pinned!(future: F); [INFO] [stderr] | ^^^^^^^^^^^^^ [INFO] [stderr] | [INFO] [stderr] = note: import resolution is stuck, try simplifying macro imports [INFO] [stderr] [INFO] [stderr] error[E0433]: failed to resolve: use of undeclared type or module `futures_test` [INFO] [stderr] --> tests/futures_ordered.rs:5:5 [INFO] [stderr] | [INFO] [stderr] 5 | use futures_test::task::noop_context; [INFO] [stderr] | ^^^^^^^^^^^^ use of undeclared type or module `futures_test` [INFO] [stderr] [INFO] [stderr] error[E0433]: failed to resolve: use of undeclared type or module `futures_test` [INFO] [stderr] --> tests/sink.rs:9:5 [INFO] [stderr] | [INFO] [stderr] 9 | use futures_test::task::panic_context; [INFO] [stderr] | ^^^^^^^^^^^^ use of undeclared type or module `futures_test` [INFO] [stderr] [INFO] [stderr] error[E0432]: unresolved import `assert_matches` [INFO] [stderr] --> tests/io_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: cannot determine resolution for the macro `assert_matches` [INFO] [stderr] --> tests/io_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/io_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/io_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/io_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] warning: unused import: `futures::Poll` [INFO] [stderr] --> tests/io_cursor.rs:2:5 [INFO] [stderr] | [INFO] [stderr] 2 | use futures::Poll; [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/io_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/io_cursor.rs:6:5 [INFO] [stderr] | [INFO] [stderr] 6 | use std::pin::Pin; [INFO] [stderr] | ^^^^^^^^^^^^^ [INFO] [stderr] [INFO] [stderr] error[E0425]: cannot find function `noop_context` in this scope [INFO] [stderr] --> tests/futures_ordered.rs:17:41 [INFO] [stderr] | [INFO] [stderr] 17 | assert!(stream.poll_next_unpin(&mut noop_context()).is_pending()); [INFO] [stderr] | ^^^^^^^^^^^^ not found in this scope [INFO] [stderr] [INFO] [stderr] error[E0425]: cannot find function `noop_context` in this scope [INFO] [stderr] --> tests/futures_ordered.rs:40:18 [INFO] [stderr] | [INFO] [stderr] 40 | let mut cx = noop_context(); [INFO] [stderr] | ^^^^^^^^^^^^ not found in this scope [INFO] [stderr] [INFO] [stderr] error[E0425]: cannot find function `noop_context` in this scope [INFO] [stderr] --> tests/futures_ordered.rs:73:19 [INFO] [stderr] | [INFO] [stderr] 73 | let cx = &mut noop_context(); [INFO] [stderr] | ^^^^^^^^^^^^ not found in this scope [INFO] [stderr] [INFO] [stderr] error[E0599]: no method named `run_in_background` found for type `futures_util::future::map::Map>, [closure@tests/eager_drop.rs:17:17: 17:71 tx1:_]>, [closure@tests/eager_drop.rs:18:14: 21:10 rx1:_, tx2:_]>` in the current scope [INFO] [stderr] --> tests/eager_drop.rs:22:10 [INFO] [stderr] | [INFO] [stderr] 22 | .run_in_background(); [INFO] [stderr] | ^^^^^^^^^^^^^^^^^ method not found in `futures_util::future::map::Map>, [closure@tests/eager_drop.rs:17:17: 17:71 tx1:_]>, [closure@tests/eager_drop.rs:18:14: 21:10 rx1:_, tx2:_]>` [INFO] [stderr] [INFO] [stderr] error[E0599]: no method named `run_in_background` found for type `futures_util::future::map::Map>, [closure@tests/eager_drop.rs:35:18: 35:72 tx1:_]>, [closure@tests/eager_drop.rs:36:14: 39:10 rx1:_, tx2:_]>` in the current scope [INFO] [stderr] --> tests/eager_drop.rs:40:10 [INFO] [stderr] | [INFO] [stderr] 40 | .run_in_background(); [INFO] [stderr] | ^^^^^^^^^^^^^^^^^ method not found in `futures_util::future::map::Map>, [closure@tests/eager_drop.rs:35:18: 35:72 tx1:_]>, [closure@tests/eager_drop.rs:36:14: 39:10 rx1:_, tx2:_]>` [INFO] [stderr] [INFO] [stderr] error[E0599]: no method named `future` found for type `std::pin::Pin<&mut FutureData>` in the current scope [INFO] [stderr] --> tests/eager_drop.rs:58:14 [INFO] [stderr] | [INFO] [stderr] 58 | self.future().poll(cx) [INFO] [stderr] | ^^^^^^-- help: remove the arguments [INFO] [stderr] | | [INFO] [stderr] | field, not a method [INFO] [stderr] [INFO] [stderr] error[E0425]: cannot find function `panic_context` in this scope [INFO] [stderr] --> tests/sink.rs:24:34 [INFO] [stderr] | [INFO] [stderr] 24 | match s.poll_next_unpin(&mut panic_context()) { [INFO] [stderr] | ^^^^^^^^^^^^^ not found in this scope [INFO] [stderr] [INFO] [stderr] error[E0425]: cannot find function `panic_context` in this scope [INFO] [stderr] --> tests/sink.rs:453:23 [INFO] [stderr] | [INFO] [stderr] 453 | let cx = &mut panic_context(); [INFO] [stderr] | ^^^^^^^^^^^^^ not found in this scope [INFO] [stderr] [INFO] [stderr] error[E0425]: cannot find function `panic_context` in this scope [INFO] [stderr] --> tests/sink.rs:479:23 [INFO] [stderr] | [INFO] [stderr] 479 | let cx = &mut panic_context(); [INFO] [stderr] | ^^^^^^^^^^^^^ not found in this scope [INFO] [stderr] [INFO] [stderr] error[E0599]: no method named `run_in_background` found for type `futures_util::future::then::Then, [closure@tests/eager_drop.rs:68:57: 68:73]>, std::sync::mpsc::Sender<()>>, futures_util::future::ready::Ready<()>, [closure@tests/eager_drop.rs:69:15: 73:10 rx1:_, tx2:_]>` in the current scope [INFO] [stderr] --> tests/eager_drop.rs:74:10 [INFO] [stderr] | [INFO] [stderr] 74 | .run_in_background(); [INFO] [stderr] | ^^^^^^^^^^^^^^^^^ method not found in `futures_util::future::then::Then, [closure@tests/eager_drop.rs:68:57: 68:73]>, std::sync::mpsc::Sender<()>>, futures_util::future::ready::Ready<()>, [closure@tests/eager_drop.rs:69:15: 73:10 rx1:_, tx2:_]>` [INFO] [stderr] [INFO] [stderr] error: aborting due to 5 previous errors [INFO] [stderr] [INFO] [stderr] For more information about this error, try `rustc --explain E0432`. [INFO] [stderr] error[E0599]: no method named `run_in_background` found for type `futures_util::try_future::and_then::AndThen>, [closure@tests/eager_drop.rs:87:57: 87:73]>, std::sync::mpsc::Sender<()>>, futures_util::future::ready::Ready>, [closure@tests/eager_drop.rs:88:19: 92:10 rx1:_, tx2:_]>` in the current scope [INFO] [stderr] --> tests/eager_drop.rs:93:10 [INFO] [stderr] | [INFO] [stderr] 93 | .run_in_background(); [INFO] [stderr] | ^^^^^^^^^^^^^^^^^ method not found in `futures_util::try_future::and_then::AndThen>, [closure@tests/eager_drop.rs:87:57: 87:73]>, std::sync::mpsc::Sender<()>>, futures_util::future::ready::Ready>, [closure@tests/eager_drop.rs:88:19: 92:10 rx1:_, tx2:_]>` [INFO] [stderr] [INFO] [stderr] error: could not compile `futures-preview`. [INFO] [stderr] warning: build failed, waiting for other jobs to finish... [INFO] [stderr] error[E0599]: no method named `run_in_background` found for type `futures_util::try_future::or_else::OrElse>, [closure@tests/eager_drop.rs:106:57: 106:73]>, std::sync::mpsc::Sender<()>>, futures_util::future::ready::Ready>, [closure@tests/eager_drop.rs:107:18: 111:10 rx1:_, tx2:_]>` in the current scope [INFO] [stderr] --> tests/eager_drop.rs:112:10 [INFO] [stderr] | [INFO] [stderr] 112 | .run_in_background(); [INFO] [stderr] | ^^^^^^^^^^^^^^^^^ method not found in `futures_util::try_future::or_else::OrElse>, [closure@tests/eager_drop.rs:106:57: 106:73]>, std::sync::mpsc::Sender<()>>, futures_util::future::ready::Ready>, [closure@tests/eager_drop.rs:107:18: 111:10 rx1:_, tx2:_]>` [INFO] [stderr] [INFO] [stderr] error: aborting due to 9 previous errors [INFO] [stderr] [INFO] [stderr] Some errors have detailed explanations: E0432, E0433, E0599. [INFO] [stderr] For more information about an error, try `rustc --explain E0432`. [INFO] [stderr] error: could not compile `futures-preview`. [INFO] [stderr] warning: build failed, waiting for other jobs to finish... [INFO] [stderr] error: aborting due to 4 previous errors [INFO] [stderr] [INFO] [stderr] Some errors have detailed explanations: E0425, E0433. [INFO] [stderr] For more information about an error, try `rustc --explain E0425`. [INFO] [stderr] error: could not compile `futures-preview`. [INFO] [stderr] warning: build failed, waiting for other jobs to finish... [INFO] [stderr] error: aborting due to 4 previous errors [INFO] [stderr] [INFO] [stderr] Some errors have detailed explanations: E0425, E0433. [INFO] [stderr] For more information about an error, try `rustc --explain E0425`. [INFO] [stderr] error: could not compile `futures-preview`. [INFO] [stderr] [INFO] [stderr] To learn more, run the command again with --verbose. [INFO] running `"docker" "inspect" "10aa82d8e4a72a053ba6b007041282c725aeda7203143b1b7a5a80b8883d80e9"` [INFO] running `"docker" "rm" "-f" "10aa82d8e4a72a053ba6b007041282c725aeda7203143b1b7a5a80b8883d80e9"` [INFO] [stdout] 10aa82d8e4a72a053ba6b007041282c725aeda7203143b1b7a5a80b8883d80e9