[INFO] fetching crate rak811-at-driver 0.2.0...
[INFO] testing rak811-at-driver-0.2.0 against try#c2e32f1c9652b13ed99608599c1e855462f421f3 for pr-146098-8
[INFO] extracting crate rak811-at-driver 0.2.0 into /workspace/builds/worker-2-tc2/source
[INFO] removed /workspace/builds/worker-2-tc2/source/rust-toolchain.toml
[INFO] started tweaking crates.io crate rak811-at-driver 0.2.0
[INFO] finished tweaking crates.io crate rak811-at-driver 0.2.0
[INFO] tweaked toml for crates.io crate rak811-at-driver 0.2.0 written to /workspace/builds/worker-2-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate rak811-at-driver 0.2.0 on toolchain c2e32f1c9652b13ed99608599c1e855462f421f3
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+c2e32f1c9652b13ed99608599c1e855462f421f3" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+c2e32f1c9652b13ed99608599c1e855462f421f3" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]      Locking 38 packages to latest compatible versions
[INFO] [stderr]       Adding arrayvec v0.6.1 (available: v0.7.6)
[INFO] [stderr]       Adding embassy-sync v0.1.0 (available: v0.7.2)
[INFO] [stderr]       Adding embassy-time v0.1.5 (available: v0.5.0)
[INFO] [stderr]       Adding embedded-hal v1.0.0-alpha.11 (available: v1.0.0)
[INFO] [stderr]       Adding embedded-hal-async v0.2.0-alpha.2 (available: v1.0.0)
[INFO] [stderr]       Adding embedded-io v0.4.0 (available: v0.7.1)
[INFO] [stderr]       Adding embedded-nal-async v0.3.0 (available: v0.9.0)
[INFO] [stderr]       Adding futures-intrusive v0.4.2 (available: v0.5.0)
[INFO] [stderr]       Adding heapless v0.7.17 (available: v0.9.2)
[INFO] [stderr]       Adding memchr v2.3.4 (available: v2.7.6)
[INFO] [stderr]       Adding nom v6.2.2 (available: v8.0.0)
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+c2e32f1c9652b13ed99608599c1e855462f421f3" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc2/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@sha256:4848fb76d95f26979359cc7e45710b1dbc8f3acb7aeedee7c460d7702230f228" "/opt/rustwide/cargo-home/bin/cargo" "+c2e32f1c9652b13ed99608599c1e855462f421f3" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] a786c30ff519d77dd96dd118aa0f20a3d3c9040d51d3c49eb3e3c383c11c2a16
[INFO] running `Command { std: "docker" "start" "-a" "a786c30ff519d77dd96dd118aa0f20a3d3c9040d51d3c49eb3e3c383c11c2a16", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "a786c30ff519d77dd96dd118aa0f20a3d3c9040d51d3c49eb3e3c383c11c2a16", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a786c30ff519d77dd96dd118aa0f20a3d3c9040d51d3c49eb3e3c383c11c2a16", kill_on_drop: false }`
[INFO] [stdout] a786c30ff519d77dd96dd118aa0f20a3d3c9040d51d3c49eb3e3c383c11c2a16
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc2/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=forbid" "-e" "RUSTDOCFLAGS=--cap-lints=forbid" "-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@sha256:4848fb76d95f26979359cc7e45710b1dbc8f3acb7aeedee7c460d7702230f228" "/opt/rustwide/cargo-home/bin/cargo" "+c2e32f1c9652b13ed99608599c1e855462f421f3" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] e0714935757810edaeb634f5b7436ca5cb73f74444e12cb2118067587c24e2ef
[INFO] running `Command { std: "docker" "start" "-a" "e0714935757810edaeb634f5b7436ca5cb73f74444e12cb2118067587c24e2ef", kill_on_drop: false }`
[INFO] [stderr]    Compiling semver v1.0.27
[INFO] [stderr]    Compiling nb v1.1.0
[INFO] [stderr]    Compiling futures-core v0.3.31
[INFO] [stderr]    Compiling memchr v2.3.4
[INFO] [stderr]    Compiling critical-section v1.2.0
[INFO] [stderr]    Compiling atomic-polyfill v1.0.3
[INFO] [stderr]    Compiling futures-task v0.3.31
[INFO] [stderr]    Compiling void v1.0.2
[INFO] [stderr]    Compiling embassy-sync v0.1.0
[INFO] [stderr]    Compiling no-std-net v0.5.0
[INFO] [stderr]    Compiling hash32 v0.2.1
[INFO] [stderr]    Compiling spin v0.9.8
[INFO] [stderr]    Compiling nom v6.2.2
[INFO] [stderr]    Compiling embassy-time v0.1.5
[INFO] [stderr]    Compiling embedded-hal v1.0.0-alpha.11
[INFO] [stderr]    Compiling embedded-io v0.4.0
[INFO] [stderr]    Compiling nb v0.1.3
[INFO] [stderr]    Compiling futures-util v0.3.31
[INFO] [stderr]    Compiling no-std-net v0.6.0
[INFO] [stderr]    Compiling embedded-io v0.3.1
[INFO] [stderr]    Compiling embedded-hal v0.2.7
[INFO] [stderr]    Compiling embedded-hal-async v0.2.0-alpha.2
[INFO] [stderr]    Compiling futures-intrusive v0.4.2
[INFO] [stderr]    Compiling arrayvec v0.6.1
[INFO] [stderr]    Compiling embassy-futures v0.1.2
[INFO] [stdout] error[E0658]: `impl Trait` in associated types is unstable
[INFO] [stdout]    --> /opt/rustwide/cargo-home/registry/src/index.crates.io-1949cf8c6b5b557f/embedded-io-0.3.1/src/asynch.rs:132:27
[INFO] [stdout]     |
[INFO] [stdout] 132 |     type ReadFuture<'a> = impl Future<Output = Result<usize, Self::Error>> + 'a
[INFO] [stdout]     |                           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: see issue #63063 <https://github.com/rust-lang/rust/issues/63063> for more information
[INFO] [stdout]     = help: add `#![feature(impl_trait_in_assoc_type)]` to the crate attributes to enable
[INFO] [stdout]     = note: this compiler was built on 2025-11-07; consider upgrading it if it is out of date
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0658]: `impl Trait` in associated types is unstable
[INFO] [stdout]    --> /opt/rustwide/cargo-home/registry/src/index.crates.io-1949cf8c6b5b557f/embedded-io-0.3.1/src/asynch.rs:143:30
[INFO] [stdout]     |
[INFO] [stdout] 143 |     type FillBufFuture<'a> = impl Future<Output = Result<&'a [u8], Self::Error>>
[INFO] [stdout]     |                              ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: see issue #63063 <https://github.com/rust-lang/rust/issues/63063> for more information
[INFO] [stdout]     = help: add `#![feature(impl_trait_in_assoc_type)]` to the crate attributes to enable
[INFO] [stdout]     = note: this compiler was built on 2025-11-07; consider upgrading it if it is out of date
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0658]: `impl Trait` in associated types is unstable
[INFO] [stdout]    --> /opt/rustwide/cargo-home/registry/src/index.crates.io-1949cf8c6b5b557f/embedded-io-0.3.1/src/asynch.rs:157:28
[INFO] [stdout]     |
[INFO] [stdout] 157 |     type WriteFuture<'a> = impl Future<Output = Result<usize, Self::Error>> + 'a
[INFO] [stdout]     |                            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: see issue #63063 <https://github.com/rust-lang/rust/issues/63063> for more information
[INFO] [stdout]     = help: add `#![feature(impl_trait_in_assoc_type)]` to the crate attributes to enable
[INFO] [stdout]     = note: this compiler was built on 2025-11-07; consider upgrading it if it is out of date
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0658]: `impl Trait` in associated types is unstable
[INFO] [stdout]    --> /opt/rustwide/cargo-home/registry/src/index.crates.io-1949cf8c6b5b557f/embedded-io-0.3.1/src/asynch.rs:166:28
[INFO] [stdout]     |
[INFO] [stdout] 166 |     type FlushFuture<'a> = impl Future<Output = Result<(), Self::Error>> + 'a
[INFO] [stdout]     |                            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: see issue #63063 <https://github.com/rust-lang/rust/issues/63063> for more information
[INFO] [stdout]     = help: add `#![feature(impl_trait_in_assoc_type)]` to the crate attributes to enable
[INFO] [stdout]     = note: this compiler was built on 2025-11-07; consider upgrading it if it is out of date
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0658]: `impl Trait` in associated types is unstable
[INFO] [stdout]    --> /opt/rustwide/cargo-home/registry/src/index.crates.io-1949cf8c6b5b557f/embedded-io-0.3.1/src/asynch.rs:177:27
[INFO] [stdout]     |
[INFO] [stdout] 177 |     type SeekFuture<'a> = impl Future<Output = Result<u64, Self::Error>> + 'a
[INFO] [stdout]     |                           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: see issue #63063 <https://github.com/rust-lang/rust/issues/63063> for more information
[INFO] [stdout]     = help: add `#![feature(impl_trait_in_assoc_type)]` to the crate attributes to enable
[INFO] [stdout]     = note: this compiler was built on 2025-11-07; consider upgrading it if it is out of date
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0658]: `impl Trait` in associated types is unstable
[INFO] [stdout]    --> /opt/rustwide/cargo-home/registry/src/index.crates.io-1949cf8c6b5b557f/embedded-io-0.3.1/src/asynch.rs:192:27
[INFO] [stdout]     |
[INFO] [stdout] 192 |     type ReadFuture<'a> = impl Future<Output = Result<usize, Self::Error>> + 'a
[INFO] [stdout]     |                           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: see issue #63063 <https://github.com/rust-lang/rust/issues/63063> for more information
[INFO] [stdout]     = help: add `#![feature(impl_trait_in_assoc_type)]` to the crate attributes to enable
[INFO] [stdout]     = note: this compiler was built on 2025-11-07; consider upgrading it if it is out of date
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0658]: `impl Trait` in associated types is unstable
[INFO] [stdout]    --> /opt/rustwide/cargo-home/registry/src/index.crates.io-1949cf8c6b5b557f/embedded-io-0.3.1/src/asynch.rs:218:30
[INFO] [stdout]     |
[INFO] [stdout] 218 |     type FillBufFuture<'a> = impl Future<Output = Result<&'a [u8], Self::Error>>
[INFO] [stdout]     |                              ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: see issue #63063 <https://github.com/rust-lang/rust/issues/63063> for more information
[INFO] [stdout]     = help: add `#![feature(impl_trait_in_assoc_type)]` to the crate attributes to enable
[INFO] [stdout]     = note: this compiler was built on 2025-11-07; consider upgrading it if it is out of date
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0658]: `impl Trait` in associated types is unstable
[INFO] [stdout]    --> /opt/rustwide/cargo-home/registry/src/index.crates.io-1949cf8c6b5b557f/embedded-io-0.3.1/src/asynch.rs:243:28
[INFO] [stdout]     |
[INFO] [stdout] 243 |     type WriteFuture<'a> = impl Future<Output = Result<usize, Self::Error>> + 'a
[INFO] [stdout]     |                            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: see issue #63063 <https://github.com/rust-lang/rust/issues/63063> for more information
[INFO] [stdout]     = help: add `#![feature(impl_trait_in_assoc_type)]` to the crate attributes to enable
[INFO] [stdout]     = note: this compiler was built on 2025-11-07; consider upgrading it if it is out of date
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0658]: `impl Trait` in associated types is unstable
[INFO] [stdout]    --> /opt/rustwide/cargo-home/registry/src/index.crates.io-1949cf8c6b5b557f/embedded-io-0.3.1/src/asynch.rs:258:28
[INFO] [stdout]     |
[INFO] [stdout] 258 |     type FlushFuture<'a> = impl Future<Output = Result<(), Self::Error>>
[INFO] [stdout]     |                            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: see issue #63063 <https://github.com/rust-lang/rust/issues/63063> for more information
[INFO] [stdout]     = help: add `#![feature(impl_trait_in_assoc_type)]` to the crate attributes to enable
[INFO] [stdout]     = note: this compiler was built on 2025-11-07; consider upgrading it if it is out of date
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]    Compiling moveslice v2.0.1
[INFO] [stdout] error: unconstrained opaque type
[INFO] [stdout]   --> /opt/rustwide/cargo-home/registry/src/index.crates.io-1949cf8c6b5b557f/embedded-io-0.3.1/src/asynch.rs:10:3
[INFO] [stdout]    |
[INFO] [stdout] 10 | = impl Future<Output = Result<(), ReadExactError<T::Error>>> + 'a;
[INFO] [stdout]    |   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `ReadExactFuture` must be used in combination with a concrete type within the same crate
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: unconstrained opaque type
[INFO] [stdout]   --> /opt/rustwide/cargo-home/registry/src/index.crates.io-1949cf8c6b5b557f/embedded-io-0.3.1/src/asynch.rs:62:3
[INFO] [stdout]    |
[INFO] [stdout] 62 | = impl Future<Output = Result<(), T::Error>> + 'a;
[INFO] [stdout]    |   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `WriteAllFuture` must be used in combination with a concrete type within the same crate
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: unconstrained opaque type
[INFO] [stdout]    --> /opt/rustwide/cargo-home/registry/src/index.crates.io-1949cf8c6b5b557f/embedded-io-0.3.1/src/asynch.rs:103:3
[INFO] [stdout]     |
[INFO] [stdout] 103 | = impl Future<Output = Result<(), T::Error>> + 'a;
[INFO] [stdout]     |   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `RewindFuture` must be used in combination with a concrete type within the same crate
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0308]: mismatched types
[INFO] [stdout]   --> /opt/rustwide/cargo-home/registry/src/index.crates.io-1949cf8c6b5b557f/embedded-io-0.3.1/src/asynch.rs:26:9
[INFO] [stdout]    |
[INFO] [stdout] 10 |   = impl Future<Output = Result<(), ReadExactError<T::Error>>> + 'a;
[INFO] [stdout]    |     --------------------------------------------------------------- the expected future
[INFO] [stdout] ...
[INFO] [stdout] 25 |       fn read_exact<'a>(&'a mut self, mut buf: &'a mut [u8]) -> ReadExactFuture<'a, Self> {
[INFO] [stdout]    |                                                                 ------------------------- expected `ReadExactFuture<'a, Self>` because of return type
[INFO] [stdout] 26 | /         async move {
[INFO] [stdout] 27 | |             while !buf.is_empty() {
[INFO] [stdout] 28 | |                 match self.read(buf).await {
[INFO] [stdout] 29 | |                     Ok(0) => break,
[INFO] [stdout] ...  |
[INFO] [stdout] 39 | |         }
[INFO] [stdout]    | |_________^ expected future, found `async` block
[INFO] [stdout]    |
[INFO] [stdout]    = note: expected opaque type `ReadExactFuture<'a, Self>`
[INFO] [stdout]             found `async` block `{async block@/opt/rustwide/cargo-home/registry/src/index.crates.io-1949cf8c6b5b557f/embedded-io-0.3.1/src/asynch.rs:26:9: 26:19}`
[INFO] [stdout] note: this item must have a `#[define_opaque(ReadExactFuture)]` attribute to be able to define hidden types
[INFO] [stdout]   --> /opt/rustwide/cargo-home/registry/src/index.crates.io-1949cf8c6b5b557f/embedded-io-0.3.1/src/asynch.rs:25:8
[INFO] [stdout]    |
[INFO] [stdout] 25 |     fn read_exact<'a>(&'a mut self, mut buf: &'a mut [u8]) -> ReadExactFuture<'a, Self> {
[INFO] [stdout]    |        ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0308]: mismatched types
[INFO] [stdout]   --> /opt/rustwide/cargo-home/registry/src/index.crates.io-1949cf8c6b5b557f/embedded-io-0.3.1/src/asynch.rs:86:9
[INFO] [stdout]    |
[INFO] [stdout] 62 |   = impl Future<Output = Result<(), T::Error>> + 'a;
[INFO] [stdout]    |     ----------------------------------------------- the expected future
[INFO] [stdout] ...
[INFO] [stdout] 85 |       fn write_all<'a>(&'a mut self, buf: &'a [u8]) -> WriteAllFuture<'a, Self> {
[INFO] [stdout]    |                                                        ------------------------ expected `WriteAllFuture<'a, Self>` because of return type
[INFO] [stdout] 86 | /         async move {
[INFO] [stdout] 87 | |             let mut buf = buf;
[INFO] [stdout] 88 | |             while !buf.is_empty() {
[INFO] [stdout] 89 | |                 match self.write(buf).await {
[INFO] [stdout] ...  |
[INFO] [stdout] 95 | |             Ok(())
[INFO] [stdout] 96 | |         }
[INFO] [stdout]    | |_________^ expected future, found `async` block
[INFO] [stdout]    |
[INFO] [stdout]    = note: expected opaque type `WriteAllFuture<'a, Self>`
[INFO] [stdout]             found `async` block `{async block@/opt/rustwide/cargo-home/registry/src/index.crates.io-1949cf8c6b5b557f/embedded-io-0.3.1/src/asynch.rs:86:9: 86:19}`
[INFO] [stdout] note: this item must have a `#[define_opaque(WriteAllFuture)]` attribute to be able to define hidden types
[INFO] [stdout]   --> /opt/rustwide/cargo-home/registry/src/index.crates.io-1949cf8c6b5b557f/embedded-io-0.3.1/src/asynch.rs:85:8
[INFO] [stdout]    |
[INFO] [stdout] 85 |     fn write_all<'a>(&'a mut self, buf: &'a [u8]) -> WriteAllFuture<'a, Self> {
[INFO] [stdout]    |        ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0308]: mismatched types
[INFO] [stdout]    --> /opt/rustwide/cargo-home/registry/src/index.crates.io-1949cf8c6b5b557f/embedded-io-0.3.1/src/asynch.rs:119:9
[INFO] [stdout]     |
[INFO] [stdout] 103 |   = impl Future<Output = Result<(), T::Error>> + 'a;
[INFO] [stdout]     |     ----------------------------------------------- the expected future
[INFO] [stdout] ...
[INFO] [stdout] 118 |       fn rewind<'a>(&'a mut self) -> RewindFuture<'a, Self> {
[INFO] [stdout]     |                                      ---------------------- expected `RewindFuture<'a, Self>` because of return type
[INFO] [stdout] 119 | /         async move {
[INFO] [stdout] 120 | |             self.seek(crate::SeekFrom::Start(0)).await?;
[INFO] [stdout] 121 | |             Ok(())
[INFO] [stdout] 122 | |         }
[INFO] [stdout]     | |_________^ expected future, found `async` block
[INFO] [stdout]     |
[INFO] [stdout]     = note: expected opaque type `RewindFuture<'a, Self>`
[INFO] [stdout]              found `async` block `{async block@/opt/rustwide/cargo-home/registry/src/index.crates.io-1949cf8c6b5b557f/embedded-io-0.3.1/src/asynch.rs:119:9: 119:19}`
[INFO] [stdout] note: this item must have a `#[define_opaque(RewindFuture)]` attribute to be able to define hidden types
[INFO] [stdout]    --> /opt/rustwide/cargo-home/registry/src/index.crates.io-1949cf8c6b5b557f/embedded-io-0.3.1/src/asynch.rs:118:8
[INFO] [stdout]     |
[INFO] [stdout] 118 |     fn rewind<'a>(&'a mut self) -> RewindFuture<'a, Self> {
[INFO] [stdout]     |        ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] Some errors have detailed explanations: E0308, E0658.
[INFO] [stdout] 
[INFO] [stdout] For more information about an error, try `rustc --explain E0308`.
[INFO] [stdout] 
[INFO] [stderr]    Compiling rustc_version v0.4.1
[INFO] [stderr] error: could not compile `embedded-io` (lib) due to 15 previous errors
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] running `Command { std: "docker" "inspect" "e0714935757810edaeb634f5b7436ca5cb73f74444e12cb2118067587c24e2ef", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e0714935757810edaeb634f5b7436ca5cb73f74444e12cb2118067587c24e2ef", kill_on_drop: false }`
[INFO] [stdout] e0714935757810edaeb634f5b7436ca5cb73f74444e12cb2118067587c24e2ef
