[INFO] cloning repository https://github.com/iovxw/babel [INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/iovxw/babel" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fiovxw%2Fbabel", kill_on_drop: false }` [INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fiovxw%2Fbabel'... [INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }` [INFO] [stdout] d01d16153443656cfc54338c07c738aca881a401 [INFO] checking iovxw/babel against master#506512391b1a75ae450d36c9420978402a91abcc for pr-125384 [INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fiovxw%2Fbabel" "/workspace/builds/worker-6-tc1/source", kill_on_drop: false }` [INFO] [stderr] Cloning into '/workspace/builds/worker-6-tc1/source'... [INFO] [stderr] done. [INFO] validating manifest of git repo https://github.com/iovxw/babel on toolchain 506512391b1a75ae450d36c9420978402a91abcc [INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+506512391b1a75ae450d36c9420978402a91abcc" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }` [INFO] started tweaking git repo https://github.com/iovxw/babel [INFO] finished tweaking git repo https://github.com/iovxw/babel [INFO] tweaked toml for git repo https://github.com/iovxw/babel written to /workspace/builds/worker-6-tc1/source/Cargo.toml [INFO] crate git repo https://github.com/iovxw/babel already has a lockfile, it will not be regenerated [INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+506512391b1a75ae450d36c9420978402a91abcc" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }` [INFO] [stderr] Updating crates.io index [INFO] [stderr] Downloading crates ... [INFO] [stderr] Downloaded tokio-executor v0.1.4 [INFO] [stderr] Downloaded lazycell v1.1.0 [INFO] [stderr] Downloaded tokio-io v0.1.8 [INFO] [stderr] Downloaded tokio-reactor v0.1.5 [INFO] [stderr] Downloaded rand_core v0.2.1 [INFO] [stderr] Downloaded lock_api v0.1.3 [INFO] [stderr] Downloaded futures v0.1.24 [INFO] [stderr] Downloaded tokio-threadpool v0.1.6 [INFO] [stderr] Downloaded serde_derive v1.0.78 [INFO] [stderr] Downloaded serde_json v1.0.27 [INFO] [stderr] Downloaded serde v1.0.78 [INFO] [stderr] Downloaded openssl v0.10.11 [INFO] [stderr] Downloaded crossbeam-epoch v0.6.0 [INFO] [stderr] Downloaded actix_derive v0.3.0 [INFO] [stderr] Downloaded trust-dns-resolver v0.9.1 [INFO] [stderr] Downloaded indexmap v1.0.1 [INFO] [stderr] Downloaded trust-dns-proto v0.4.0 [INFO] [stderr] Downloaded h2 v0.1.12 [INFO] [stderr] Downloaded actix-web v0.7.7 [INFO] [stderr] Downloaded http v0.1.12 [INFO] [stderr] Downloaded encoding_rs v0.8.6 [INFO] [stderr] Downloaded tokio-tls v0.2.0 [INFO] [stderr] Downloaded derive_builder_core v0.2.0 [INFO] [stderr] Downloaded scraper v0.7.0 [INFO] [stderr] Downloaded tokio-signal v0.2.5 [INFO] [stderr] Downloaded actix v0.7.4 [INFO] [stderr] Downloaded quick-xml v0.12.3 [INFO] [stderr] Downloaded syn v0.15.4 [INFO] [stderr] Downloaded tokio v0.1.8 [INFO] [stderr] Downloaded crossbeam-channel v0.2.5 [INFO] [stderr] Downloaded error-chain v0.1.12 [INFO] [stderr] Downloaded flate2 v1.0.2 [INFO] [stderr] Downloaded tempfile v3.0.3 [INFO] [stderr] Downloaded native-tls v0.2.1 [INFO] [stderr] Downloaded derive_builder v0.5.1 [INFO] [stderr] Downloaded memchr v2.0.2 [INFO] [stderr] Downloaded termcolor v1.0.3 [INFO] [stderr] Downloaded ego-tree v0.5.0 [INFO] [stderr] Downloaded cssparser v0.23.10 [INFO] [stderr] Downloaded tokio-uds v0.2.1 [INFO] [stderr] Downloaded security-framework-sys v0.2.1 [INFO] [stderr] Downloaded cssparser-macros v0.3.4 [INFO] [stderr] Downloaded tokio-current-thread v0.1.1 [INFO] [stderr] Downloaded tokio-channel v0.1.0 [INFO] [stderr] Downloaded tokio-async-await v0.1.2 [INFO] [stderr] Downloaded tokio-timer v0.2.6 [INFO] [stderr] Downloaded ring v0.13.2 [INFO] [stderr] Downloaded atom_syndication v0.6.0 [INFO] [stderr] Downloaded futures-io-preview v0.3.0-alpha.6 [INFO] [stderr] Downloaded futures-channel-preview v0.3.0-alpha.6 [INFO] [stderr] Downloaded futures-core-preview v0.3.0-alpha.6 [INFO] [stderr] Downloaded futures-sink-preview v0.3.0-alpha.6 [INFO] [stderr] Downloaded pin-utils v0.1.0-alpha.2 [INFO] [stderr] Downloaded futures-util-preview v0.3.0-alpha.6 [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/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" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:beeedbb442662e57d416641ecc3200b38e573c25b057896194468d05594dd835" "/opt/rustwide/cargo-home/bin/cargo" "+506512391b1a75ae450d36c9420978402a91abcc" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }` [INFO] [stdout] 56f8880458f64f14f011408274629c0d9f9d16742c2dca47b512e19d9c8494f3 [INFO] running `Command { std: "docker" "start" "-a" "56f8880458f64f14f011408274629c0d9f9d16742c2dca47b512e19d9c8494f3", kill_on_drop: false }` [INFO] running `Command { std: "docker" "inspect" "56f8880458f64f14f011408274629c0d9f9d16742c2dca47b512e19d9c8494f3", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "56f8880458f64f14f011408274629c0d9f9d16742c2dca47b512e19d9c8494f3", kill_on_drop: false }` [INFO] [stdout] 56f8880458f64f14f011408274629c0d9f9d16742c2dca47b512e19d9c8494f3 [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/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" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=allow" "-e" "RUSTDOCFLAGS=--cap-lints=allow" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:beeedbb442662e57d416641ecc3200b38e573c25b057896194468d05594dd835" "/opt/rustwide/cargo-home/bin/cargo" "+506512391b1a75ae450d36c9420978402a91abcc" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }` [INFO] [stdout] 604c341ab6f0e13ff22576080ec36f479ce1fb2b8c4c505aecfd3aac00f66683 [INFO] running `Command { std: "docker" "start" "-a" "604c341ab6f0e13ff22576080ec36f479ce1fb2b8c4c505aecfd3aac00f66683", kill_on_drop: false }` [INFO] [stderr] Checking libc v0.2.43 [INFO] [stderr] Compiling version_check v0.1.4 [INFO] [stderr] Checking cfg-if v0.1.5 [INFO] [stderr] Compiling cc v1.0.25 [INFO] [stderr] Compiling proc-macro2 v0.4.19 [INFO] [stderr] Checking futures v0.1.24 [INFO] [stderr] Compiling rand_core v0.2.1 [INFO] [stderr] Checking byteorder v1.2.6 [INFO] [stderr] Checking crossbeam-utils v0.5.0 [INFO] [stderr] Compiling proc-macro2 v0.3.8 [INFO] [stderr] Checking slab v0.4.1 [INFO] [stderr] Checking nodrop v0.1.12 [INFO] [stderr] Checking smallvec v0.6.5 [INFO] [stderr] Compiling parking_lot_core v0.3.1 [INFO] [stderr] Checking log v0.4.5 [INFO] [stderr] Checking owning_ref v0.3.3 [INFO] [stderr] Compiling winapi-build v0.1.1 [INFO] [stderr] Compiling serde v1.0.78 [INFO] [stderr] Checking lazycell v1.1.0 [INFO] [stderr] Checking arrayvec v0.4.7 [INFO] [stderr] Checking lock_api v0.1.3 [INFO] [stderr] Compiling ryu v0.2.6 [INFO] [stderr] Checking siphasher v0.2.3 [INFO] [stderr] Checking rustc-demangle v0.1.9 [INFO] [stderr] Compiling dbghelp-sys v0.2.0 [INFO] [stderr] Compiling string_cache_shared v0.3.0 [INFO] [stderr] Compiling kernel32-sys v0.2.2 [INFO] [stderr] Compiling lazy_static v1.1.0 [INFO] [stderr] Compiling unicase v1.4.2 [INFO] [stderr] Checking winapi v0.2.8 [INFO] [stderr] Checking unicode-normalization v0.1.7 [INFO] [stderr] Compiling failure_derive v0.1.2 [INFO] [stderr] Compiling quote v0.5.2 [INFO] [stderr] Compiling backtrace v0.2.3 [INFO] [stderr] Compiling rand v0.5.5 [INFO] [stderr] Checking iovec v0.1.2 [INFO] [stderr] Checking num_cpus v1.8.0 [INFO] [stderr] Checking bytes v0.4.10 [INFO] [stderr] Checking net2 v0.2.33 [INFO] [stderr] Compiling syn v0.13.11 [INFO] [stderr] Checking crossbeam-epoch v0.5.2 [INFO] [stderr] Compiling phf_shared v0.7.23 [INFO] [stderr] Checking memchr v2.0.2 [INFO] [stderr] Checking phf v0.7.23 [INFO] [stderr] Checking mio v0.6.16 [INFO] [stderr] Compiling quote v0.6.8 [INFO] [stderr] Checking new_debug_unreachable v1.0.1 [INFO] [stderr] Checking crossbeam-deque v0.6.1 [INFO] [stderr] Checking either v1.5.0 [INFO] [stderr] Compiling itoa v0.4.3 [INFO] [stderr] Checking dtoa v0.4.3 [INFO] [stderr] Checking rand v0.4.3 [INFO] [stderr] Compiling syn v0.14.9 [INFO] [stderr] Compiling syn v0.15.4 [INFO] [stderr] Checking futures-core-preview v0.3.0-alpha.6 [INFO] [stderr] Compiling unicase v2.1.0 [INFO] [stderr] Checking precomputed-hash v0.1.1 [INFO] [stderr] Compiling backtrace-sys v0.1.24 [INFO] [stdout] error[E0432]: unresolved import `core::pin::PinMut` [INFO] [stdout] --> /opt/rustwide/cargo-home/registry/src/index.crates.io-6f17d22bba15001f/futures-core-preview-0.3.0-alpha.6/src/future.rs:4:5 [INFO] [stdout] | [INFO] [stdout] 4 | use core::pin::PinMut; [INFO] [stdout] | ^^^^^^^^^^^^^^^^^ no `PinMut` in `pin` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] error[E0432]: unresolved imports `core::future::FutureObj`, `core::future::LocalFutureObj`, `core::future::UnsafeFutureObj` [INFO] [stdout] --> /opt/rustwide/cargo-home/registry/src/index.crates.io-6f17d22bba15001f/futures-core-preview-0.3.0-alpha.6/src/future.rs:6:32 [INFO] [stdout] | [INFO] [stdout] 6 | pub use core::future::{Future, FutureObj, LocalFutureObj, UnsafeFutureObj}; [INFO] [stdout] | ^^^^^^^^^ ^^^^^^^^^^^^^^ ^^^^^^^^^^^^^^^ no `UnsafeFutureObj` in `future` [INFO] [stdout] | | | [INFO] [stdout] | | no `LocalFutureObj` in `future` [INFO] [stdout] | no `FutureObj` in `future` [INFO] [stdout] | help: a similar name exists in the module: `Future` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] error[E0432]: unresolved import `core::pin::PinMut` [INFO] [stdout] --> /opt/rustwide/cargo-home/registry/src/index.crates.io-6f17d22bba15001f/futures-core-preview-0.3.0-alpha.6/src/stream/mod.rs:5:5 [INFO] [stdout] | [INFO] [stdout] 5 | use core::pin::PinMut; [INFO] [stdout] | ^^^^^^^^^^^^^^^^^ no `PinMut` in `pin` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] error[E0432]: unresolved import `core::pin::PinMut` [INFO] [stdout] --> /opt/rustwide/cargo-home/registry/src/index.crates.io-6f17d22bba15001f/futures-core-preview-0.3.0-alpha.6/src/stream/stream_obj.rs:5:5 [INFO] [stdout] | [INFO] [stdout] 5 | use core::pin::PinMut; [INFO] [stdout] | ^^^^^^^^^^^^^^^^^ no `PinMut` in `pin` [INFO] [stdout] | [INFO] [stdout] help: consider importing this unresolved item through its public re-export instead [INFO] [stdout] | [INFO] [stdout] 5 | use crate::stream::PinMut; [INFO] [stdout] | ~~~~~~~~~~~~~~~~~~~~~ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] error[E0433]: failed to resolve: use of undeclared crate or module `std` [INFO] [stdout] --> /opt/rustwide/cargo-home/registry/src/index.crates.io-6f17d22bba15001f/futures-core-preview-0.3.0-alpha.6/src/stream/stream_obj.rs:196:9 [INFO] [stdout] | [INFO] [stdout] 196 | use std::boxed::Box; [INFO] [stdout] | ^^^ use of undeclared crate or module `std` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] error[E0433]: failed to resolve: use of undeclared crate or module `std` [INFO] [stdout] --> /opt/rustwide/cargo-home/registry/src/index.crates.io-6f17d22bba15001f/futures-core-preview-0.3.0-alpha.6/src/stream/stream_obj.rs:197:9 [INFO] [stdout] | [INFO] [stdout] 197 | use std::pin::PinBox; [INFO] [stdout] | ^^^ use of undeclared crate or module `std` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] error[E0433]: failed to resolve: use of undeclared crate or module `std` [INFO] [stdout] --> /opt/rustwide/cargo-home/registry/src/index.crates.io-6f17d22bba15001f/futures-core-preview-0.3.0-alpha.6/src/stream/mod.rs:131:9 [INFO] [stdout] | [INFO] [stdout] 131 | use std::boxed::Box; [INFO] [stdout] | ^^^ use of undeclared crate or module `std` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] error[E0433]: failed to resolve: use of undeclared crate or module `std` [INFO] [stdout] --> /opt/rustwide/cargo-home/registry/src/index.crates.io-6f17d22bba15001f/futures-core-preview-0.3.0-alpha.6/src/stream/mod.rs:132:9 [INFO] [stdout] | [INFO] [stdout] 132 | use std::pin::PinBox; [INFO] [stdout] | ^^^ use of undeclared crate or module `std` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] error[E0433]: failed to resolve: use of undeclared crate or module `std` [INFO] [stdout] --> /opt/rustwide/cargo-home/registry/src/index.crates.io-6f17d22bba15001f/futures-core-preview-0.3.0-alpha.6/src/task.rs:10:13 [INFO] [stdout] | [INFO] [stdout] 10 | pub use std::task::{Wake, local_waker, local_waker_from_nonlocal}; [INFO] [stdout] | ^^^ use of undeclared crate or module `std` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] error[E0432]: unresolved imports `core::task::Spawn`, `core::task::UnsafeWake`, `core::task::SpawnErrorKind`, `core::task::SpawnObjError`, `core::task::SpawnLocalObjError` [INFO] [stdout] --> /opt/rustwide/cargo-home/registry/src/index.crates.io-6f17d22bba15001f/futures-core-preview-0.3.0-alpha.6/src/task.rs:4:20 [INFO] [stdout] | [INFO] [stdout] 4 | Context, Poll, Spawn, [INFO] [stdout] | ^^^^^ no `Spawn` in `task` [INFO] [stdout] 5 | Waker, LocalWaker, UnsafeWake, [INFO] [stdout] | ^^^^^^^^^^ no `UnsafeWake` in `task` [INFO] [stdout] 6 | SpawnErrorKind, SpawnObjError, SpawnLocalObjError, [INFO] [stdout] | ^^^^^^^^^^^^^^ ^^^^^^^^^^^^^ ^^^^^^^^^^^^^^^^^^ no `SpawnLocalObjError` in `task` [INFO] [stdout] | | | [INFO] [stdout] | | no `SpawnObjError` in `task` [INFO] [stdout] | no `SpawnErrorKind` in `task` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] error[E0433]: failed to resolve: could not find `std` in the list of imported crates [INFO] [stdout] --> /opt/rustwide/cargo-home/registry/src/index.crates.io-6f17d22bba15001f/futures-core-preview-0.3.0-alpha.6/src/stream/mod.rs:167:33 [INFO] [stdout] | [INFO] [stdout] 167 | impl Stream for ::std::collections::VecDeque { [INFO] [stdout] | ^^^ could not find `std` in the list of imported crates [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] error[E0433]: failed to resolve: could not find `std` in the list of imported crates [INFO] [stdout] --> /opt/rustwide/cargo-home/registry/src/index.crates.io-6f17d22bba15001f/futures-core-preview-0.3.0-alpha.6/src/stream/mod.rs:156:34 [INFO] [stdout] | [INFO] [stdout] 156 | impl Stream for ::std::panic::AssertUnwindSafe { [INFO] [stdout] | ^^^ could not find `std` in the list of imported crates [INFO] [stdout] | [INFO] [stdout] help: consider importing this module [INFO] [stdout] | [INFO] [stdout] 3 + use core::panic; [INFO] [stdout] | [INFO] [stdout] help: if you import `panic`, refer to it directly [INFO] [stdout] | [INFO] [stdout] 156 - impl Stream for ::std::panic::AssertUnwindSafe { [INFO] [stdout] 156 + impl Stream for panic::AssertUnwindSafe { [INFO] [stdout] | [INFO] [stdout] [INFO] [stdout] [INFO] [stderr] Compiling openssl-sys v0.9.35 [INFO] [stdout] error[E0658]: use of unstable library feature 'local_waker' [INFO] [stdout] --> /opt/rustwide/cargo-home/registry/src/index.crates.io-6f17d22bba15001f/futures-core-preview-0.3.0-alpha.6/src/task.rs:5:12 [INFO] [stdout] | [INFO] [stdout] 5 | Waker, LocalWaker, UnsafeWake, [INFO] [stdout] | ^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: see issue #118959 for more information [INFO] [stdout] = help: add `#![feature(local_waker)]` to the crate attributes to enable [INFO] [stdout] = note: this compiler was built on 2024-05-21; consider upgrading it if it is out of date [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] error[E0207]: the type parameter `F` is not constrained by the impl trait, self type, or predicates [INFO] [stdout] --> /opt/rustwide/cargo-home/registry/src/index.crates.io-6f17d22bba15001f/futures-core-preview-0.3.0-alpha.6/src/stream/stream_obj.rs:235:14 [INFO] [stdout] | [INFO] [stdout] 235 | impl<'a, F: Stream + Send + 'a> From> for StreamObj<'a, ()> { [INFO] [stdout] | ^ unconstrained type parameter [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] error[E0207]: the type parameter `F` is not constrained by the impl trait, self type, or predicates [INFO] [stdout] --> /opt/rustwide/cargo-home/registry/src/index.crates.io-6f17d22bba15001f/futures-core-preview-0.3.0-alpha.6/src/stream/stream_obj.rs:241:14 [INFO] [stdout] | [INFO] [stdout] 241 | impl<'a, F: Stream + Send + 'a> From> for StreamObj<'a, ()> { [INFO] [stdout] | ^ unconstrained type parameter [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] error[E0207]: the type parameter `F` is not constrained by the impl trait, self type, or predicates [INFO] [stdout] --> /opt/rustwide/cargo-home/registry/src/index.crates.io-6f17d22bba15001f/futures-core-preview-0.3.0-alpha.6/src/stream/stream_obj.rs:247:14 [INFO] [stdout] | [INFO] [stdout] 247 | impl<'a, F: Stream + 'a> From> for LocalStreamObj<'a, ()> { [INFO] [stdout] | ^ unconstrained type parameter [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] error[E0207]: the type parameter `F` is not constrained by the impl trait, self type, or predicates [INFO] [stdout] --> /opt/rustwide/cargo-home/registry/src/index.crates.io-6f17d22bba15001f/futures-core-preview-0.3.0-alpha.6/src/stream/stream_obj.rs:253:14 [INFO] [stdout] | [INFO] [stdout] 253 | impl<'a, F: Stream + 'a> From> for LocalStreamObj<'a, ()> { [INFO] [stdout] | ^ unconstrained type parameter [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] error: aborting due to 17 previous errors [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] Some errors have detailed explanations: E0207, E0432, E0433, E0658. [INFO] [stdout] [INFO] [stdout] For more information about an error, try `rustc --explain E0207`. [INFO] [stdout] [INFO] [stderr] error: could not compile `futures-core-preview` (lib) due to 18 previous errors [INFO] [stderr] warning: build failed, waiting for other jobs to finish... [INFO] running `Command { std: "docker" "inspect" "604c341ab6f0e13ff22576080ec36f479ce1fb2b8c4c505aecfd3aac00f66683", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "604c341ab6f0e13ff22576080ec36f479ce1fb2b8c4c505aecfd3aac00f66683", kill_on_drop: false }` [INFO] [stdout] 604c341ab6f0e13ff22576080ec36f479ce1fb2b8c4c505aecfd3aac00f66683