[INFO] fetching crate sphinxad 0.1.2... [INFO] testing sphinxad-0.1.2 against try#eafdee2dfae8c2233b74f98b123308be7ccefcc6 for pr-79296 [INFO] extracting crate sphinxad 0.1.2 into /workspace/builds/worker-9/source [INFO] validating manifest of crates.io crate sphinxad 0.1.2 on toolchain eafdee2dfae8c2233b74f98b123308be7ccefcc6 [INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+eafdee2dfae8c2233b74f98b123308be7ccefcc6" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }` [INFO] started tweaking crates.io crate sphinxad 0.1.2 [INFO] finished tweaking crates.io crate sphinxad 0.1.2 [INFO] tweaked toml for crates.io crate sphinxad 0.1.2 written to /workspace/builds/worker-9/source/Cargo.toml [INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+eafdee2dfae8c2233b74f98b123308be7ccefcc6" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }` [INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+eafdee2dfae8c2233b74f98b123308be7ccefcc6" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }` [INFO] [stderr] warning: only one of `license` or `license-file` is necessary [INFO] [stderr] Downloading crates ... [INFO] [stderr] Downloaded sphinxad-sys v0.1.3 [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/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" "rustops/crates-build-env@sha256:6eabd152ff4036248d66efda456a36cb33d24b7291b33f25f75140726c88da35" "/opt/rustwide/cargo-home/bin/cargo" "+eafdee2dfae8c2233b74f98b123308be7ccefcc6" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }` [INFO] [stdout] fb5f90a33d0feb9cd03a00b3fc8722e3d317f4602b6d1f93a8c64c1163a3f84b [INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap. [INFO] running `Command { std: "docker" "start" "-a" "fb5f90a33d0feb9cd03a00b3fc8722e3d317f4602b6d1f93a8c64c1163a3f84b", kill_on_drop: false }` [INFO] running `Command { std: "docker" "inspect" "fb5f90a33d0feb9cd03a00b3fc8722e3d317f4602b6d1f93a8c64c1163a3f84b", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "fb5f90a33d0feb9cd03a00b3fc8722e3d317f4602b6d1f93a8c64c1163a3f84b", kill_on_drop: false }` [INFO] [stdout] fb5f90a33d0feb9cd03a00b3fc8722e3d317f4602b6d1f93a8c64c1163a3f84b [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/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" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "rustops/crates-build-env@sha256:6eabd152ff4036248d66efda456a36cb33d24b7291b33f25f75140726c88da35" "/opt/rustwide/cargo-home/bin/cargo" "+eafdee2dfae8c2233b74f98b123308be7ccefcc6" "build" "--frozen" "--message-format=json", kill_on_drop: false }` [INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap. [INFO] [stdout] 6d6182333a8a1de03aea99e71ad62960ed90a2e02f3fe3653de506588fde0327 [INFO] running `Command { std: "docker" "start" "-a" "6d6182333a8a1de03aea99e71ad62960ed90a2e02f3fe3653de506588fde0327", kill_on_drop: false }` [INFO] [stderr] warning: only one of `license` or `license-file` is necessary [INFO] [stderr] Compiling libc v0.2.80 [INFO] [stderr] Compiling sphinxad-sys v0.1.3 [INFO] [stderr] Compiling sphinxad v0.1.2 (/opt/rustwide/workdir) [INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated [INFO] [stdout] --> src/error.rs:45:32 [INFO] [stdout] | [INFO] [stdout] 45 | fn cause(&self) -> Option<&std::error::Error> { None } [INFO] [stdout] | ^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn std::error::Error` [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(bare_trait_objects)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: 1 warning emitted [INFO] [stdout] [INFO] [stdout] [INFO] [stderr] Finished dev [unoptimized + debuginfo] target(s) in 2.70s [INFO] running `Command { std: "docker" "inspect" "6d6182333a8a1de03aea99e71ad62960ed90a2e02f3fe3653de506588fde0327", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "6d6182333a8a1de03aea99e71ad62960ed90a2e02f3fe3653de506588fde0327", kill_on_drop: false }` [INFO] [stdout] 6d6182333a8a1de03aea99e71ad62960ed90a2e02f3fe3653de506588fde0327 [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/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" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "rustops/crates-build-env@sha256:6eabd152ff4036248d66efda456a36cb33d24b7291b33f25f75140726c88da35" "/opt/rustwide/cargo-home/bin/cargo" "+eafdee2dfae8c2233b74f98b123308be7ccefcc6" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }` [INFO] [stdout] 02a22382d29fb71e7928110111de213a659518f4184d4a24b965a10729eda536 [INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap. [INFO] running `Command { std: "docker" "start" "-a" "02a22382d29fb71e7928110111de213a659518f4184d4a24b965a10729eda536", kill_on_drop: false }` [INFO] [stderr] warning: only one of `license` or `license-file` is necessary [INFO] [stderr] Blocking waiting for file lock on package cache [INFO] [stderr] Compiling sphinxad v0.1.2 (/opt/rustwide/workdir) [INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated [INFO] [stdout] --> src/error.rs:45:32 [INFO] [stdout] | [INFO] [stdout] 45 | fn cause(&self) -> Option<&std::error::Error> { None } [INFO] [stdout] | ^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn std::error::Error` [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(bare_trait_objects)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: 1 warning emitted [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated [INFO] [stdout] --> src/error.rs:45:32 [INFO] [stdout] | [INFO] [stdout] 45 | fn cause(&self) -> Option<&std::error::Error> { None } [INFO] [stdout] | ^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn std::error::Error` [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(bare_trait_objects)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: 1 warning emitted [INFO] [stdout] [INFO] [stdout] [INFO] [stderr] Finished test [unoptimized + debuginfo] target(s) in 0.56s [INFO] running `Command { std: "docker" "inspect" "02a22382d29fb71e7928110111de213a659518f4184d4a24b965a10729eda536", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "02a22382d29fb71e7928110111de213a659518f4184d4a24b965a10729eda536", kill_on_drop: false }` [INFO] [stdout] 02a22382d29fb71e7928110111de213a659518f4184d4a24b965a10729eda536 [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/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" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "rustops/crates-build-env@sha256:6eabd152ff4036248d66efda456a36cb33d24b7291b33f25f75140726c88da35" "/opt/rustwide/cargo-home/bin/cargo" "+eafdee2dfae8c2233b74f98b123308be7ccefcc6" "test" "--frozen", kill_on_drop: false }` [INFO] [stdout] 13fbd0d4cbe15a594812f2ff34e402548af9099d5a52cbf90893b28cc08776ec [INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap. [INFO] running `Command { std: "docker" "start" "-a" "13fbd0d4cbe15a594812f2ff34e402548af9099d5a52cbf90893b28cc08776ec", kill_on_drop: false }` [INFO] [stderr] warning: only one of `license` or `license-file` is necessary [INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated [INFO] [stderr] --> src/error.rs:45:32 [INFO] [stderr] | [INFO] [stderr] 45 | fn cause(&self) -> Option<&std::error::Error> { None } [INFO] [stderr] | ^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn std::error::Error` [INFO] [stderr] | [INFO] [stderr] = note: `#[warn(bare_trait_objects)]` on by default [INFO] [stderr] [INFO] [stderr] warning: 1 warning emitted [INFO] [stderr] [INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated [INFO] [stderr] --> src/error.rs:45:32 [INFO] [stderr] | [INFO] [stderr] 45 | fn cause(&self) -> Option<&std::error::Error> { None } [INFO] [stderr] | ^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn std::error::Error` [INFO] [stderr] | [INFO] [stderr] = note: `#[warn(bare_trait_objects)]` on by default [INFO] [stderr] [INFO] [stderr] warning: 1 warning emitted [INFO] [stderr] [INFO] [stderr] Finished test [unoptimized + debuginfo] target(s) in 0.01s [INFO] [stderr] Running /opt/rustwide/target/debug/deps/sphinxad-0bb97da1576cf97d [INFO] [stdout] [INFO] [stdout] running 0 tests [INFO] [stdout] [INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out [INFO] [stdout] [INFO] [stderr] Doc-tests sphinxad [INFO] [stdout] [INFO] [stdout] running 2 tests [INFO] [stderr] error: test failed, to rerun pass '--doc' [INFO] [stdout] test src/audio_device.rs - audio_device::AudioDevice::stop_recording (line 122) ... FAILED [INFO] [stdout] test src/audio_device.rs - audio_device::AudioDevice::default_with_sps (line 40) ... FAILED [INFO] [stdout] [INFO] [stdout] failures: [INFO] [stdout] [INFO] [stdout] ---- src/audio_device.rs - audio_device::AudioDevice::stop_recording (line 122) stdout ---- [INFO] [stdout] error: unexpected token: `...` [INFO] [stdout] --> src/audio_device.rs:127:5 [INFO] [stdout] | [INFO] [stdout] 7 | ... [INFO] [stdout] | ^^^ [INFO] [stdout] | [INFO] [stdout] help: use `..` for an exclusive range [INFO] [stdout] | [INFO] [stdout] 7 | .. [INFO] [stdout] | [INFO] [stdout] help: or `..=` for an inclusive range [INFO] [stdout] | [INFO] [stdout] 7 | ..= [INFO] [stdout] | [INFO] [stdout] [INFO] [stdout] error[E0586]: inclusive range with no end [INFO] [stdout] --> src/audio_device.rs:127:5 [INFO] [stdout] | [INFO] [stdout] 7 | ... [INFO] [stdout] | ^^^ help: use `..` instead [INFO] [stdout] | [INFO] [stdout] = note: inclusive ranges must be bounded at the end (`..=b` or `a..=b`) [INFO] [stdout] [INFO] [stdout] error[E0433]: failed to resolve: use of undeclared type `AudioDevice` [INFO] [stdout] --> src/audio_device.rs:123:16 [INFO] [stdout] | [INFO] [stdout] 3 | let mut device=AudioDevice::default_with_sps(44100)?; [INFO] [stdout] | ^^^^^^^^^^^ use of undeclared type `AudioDevice` [INFO] [stdout] [INFO] [stdout] error[E0433]: failed to resolve: use of undeclared crate or module `thread` [INFO] [stdout] --> src/audio_device.rs:132:1 [INFO] [stdout] | [INFO] [stdout] 12 | thread::sleep_ms(1000); [INFO] [stdout] | ^^^^^^ use of undeclared crate or module `thread` [INFO] [stdout] [INFO] [stdout] error[E0277]: the `?` operator can only be used in a function that returns `Result` or `Option` (or another type that implements `Try`) [INFO] [stdout] --> src/audio_device.rs:123:16 [INFO] [stdout] | [INFO] [stdout] 2 | / fn main() { [INFO] [stdout] 3 | | let mut device=AudioDevice::default_with_sps(44100)?; [INFO] [stdout] | | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ cannot use the `?` operator in a function that returns `()` [INFO] [stdout] 4 | | device.start_recording()?; [INFO] [stdout] 5 | | [INFO] [stdout] ... | [INFO] [stdout] 14 | | device.start_recording()?; [INFO] [stdout] 15 | | } [INFO] [stdout] | |_- this function should return `Result` or `Option` to accept `?` [INFO] [stdout] | [INFO] [stdout] = help: the trait `Try` is not implemented for `()` [INFO] [stdout] = note: required by `from_error` [INFO] [stdout] [INFO] [stdout] error[E0277]: the `?` operator can only be used in a function that returns `Result` or `Option` (or another type that implements `Try`) [INFO] [stdout] --> src/audio_device.rs:124:1 [INFO] [stdout] | [INFO] [stdout] 2 | / fn main() { [INFO] [stdout] 3 | | let mut device=AudioDevice::default_with_sps(44100)?; [INFO] [stdout] 4 | | device.start_recording()?; [INFO] [stdout] | | ^^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] | | | [INFO] [stdout] | | cannot use the `?` operator in a function that returns `()` [INFO] [stdout] 5 | | [INFO] [stdout] ... | [INFO] [stdout] 14 | | device.start_recording()?; [INFO] [stdout] 15 | | } [INFO] [stdout] | |_- this function should return `Result` or `Option` to accept `?` [INFO] [stdout] | [INFO] [stdout] = help: the trait `Try` is not implemented for `()` [INFO] [stdout] = note: required by `from_error` [INFO] [stdout] [INFO] [stdout] error[E0277]: the `?` operator can only be used in a function that returns `Result` or `Option` (or another type that implements `Try`) [INFO] [stdout] --> src/audio_device.rs:130:1 [INFO] [stdout] | [INFO] [stdout] 2 | / fn main() { [INFO] [stdout] 3 | | let mut device=AudioDevice::default_with_sps(44100)?; [INFO] [stdout] 4 | | device.start_recording()?; [INFO] [stdout] 5 | | [INFO] [stdout] ... | [INFO] [stdout] 10 | | device.stop_recording()?; [INFO] [stdout] | | ^^^^^^^^^^^^^^^^^^^^^^^^ cannot use the `?` operator in a function that returns `()` [INFO] [stdout] ... | [INFO] [stdout] 14 | | device.start_recording()?; [INFO] [stdout] 15 | | } [INFO] [stdout] | |_- this function should return `Result` or `Option` to accept `?` [INFO] [stdout] | [INFO] [stdout] = help: the trait `Try` is not implemented for `()` [INFO] [stdout] = note: required by `from_error` [INFO] [stdout] [INFO] [stdout] error[E0277]: the `?` operator can only be used in a function that returns `Result` or `Option` (or another type that implements `Try`) [INFO] [stdout] --> src/audio_device.rs:134:1 [INFO] [stdout] | [INFO] [stdout] 2 | / fn main() { [INFO] [stdout] 3 | | let mut device=AudioDevice::default_with_sps(44100)?; [INFO] [stdout] 4 | | device.start_recording()?; [INFO] [stdout] 5 | | [INFO] [stdout] ... | [INFO] [stdout] 14 | | device.start_recording()?; [INFO] [stdout] | | ^^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] | | | [INFO] [stdout] | | cannot use the `?` operator in a function that returns `()` [INFO] [stdout] 15 | | } [INFO] [stdout] | |_- this function should return `Result` or `Option` to accept `?` [INFO] [stdout] | [INFO] [stdout] = help: the trait `Try` is not implemented for `()` [INFO] [stdout] = note: required by `from_error` [INFO] [stdout] [INFO] [stdout] error: aborting due to 8 previous errors [INFO] [stdout] [INFO] [stdout] Some errors have detailed explanations: E0277, E0433, E0586. [INFO] [stdout] For more information about an error, try `rustc --explain E0277`. [INFO] [stdout] Couldn't compile the test. [INFO] [stdout] ---- src/audio_device.rs - audio_device::AudioDevice::default_with_sps (line 40) stdout ---- [INFO] [stdout] error: unexpected token: `...` [INFO] [stdout] --> src/audio_device.rs:50:17 [INFO] [stdout] | [INFO] [stdout] 12 | ... [INFO] [stdout] | ^^^ [INFO] [stdout] | [INFO] [stdout] help: use `..` for an exclusive range [INFO] [stdout] | [INFO] [stdout] 12 | .. [INFO] [stdout] | [INFO] [stdout] help: or `..=` for an inclusive range [INFO] [stdout] | [INFO] [stdout] 12 | ..= [INFO] [stdout] | [INFO] [stdout] [INFO] [stdout] error[E0586]: inclusive range with no end [INFO] [stdout] --> src/audio_device.rs:50:17 [INFO] [stdout] | [INFO] [stdout] 12 | ... [INFO] [stdout] | ^^^ help: use `..` instead [INFO] [stdout] | [INFO] [stdout] = note: inclusive ranges must be bounded at the end (`..=b` or `a..=b`) [INFO] [stdout] [INFO] [stdout] error[E0433]: failed to resolve: use of undeclared type `AudioDevice` [INFO] [stdout] --> src/audio_device.rs:43:16 [INFO] [stdout] | [INFO] [stdout] 5 | let mut device=AudioDevice::default_with_sps(44100)?; [INFO] [stdout] | ^^^^^^^^^^^ use of undeclared type `AudioDevice` [INFO] [stdout] [INFO] [stdout] error[E0425]: cannot find value `buffer` in this scope [INFO] [stdout] --> src/audio_device.rs:47:28 [INFO] [stdout] | [INFO] [stdout] 9 | match device.read(&mut buffer[..])? { [INFO] [stdout] | ^^^^^^ not found in this scope [INFO] [stdout] [INFO] [stdout] warning: use of deprecated function `std::thread::sleep_ms`: replaced by `std::thread::sleep` [INFO] [stdout] --> src/audio_device.rs:56:5 [INFO] [stdout] | [INFO] [stdout] 18 | thread::sleep_ms(100); [INFO] [stdout] | ^^^^^^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(deprecated)]` on by default [INFO] [stdout] [INFO] [stdout] error[E0277]: the `?` operator can only be used in a function that returns `Result` or `Option` (or another type that implements `Try`) [INFO] [stdout] --> src/audio_device.rs:43:16 [INFO] [stdout] | [INFO] [stdout] 2 | / fn main() { [INFO] [stdout] 3 | | use std::thread; [INFO] [stdout] 4 | | [INFO] [stdout] 5 | | let mut device=AudioDevice::default_with_sps(44100)?; [INFO] [stdout] | | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ cannot use the `?` operator in a function that returns `()` [INFO] [stdout] ... | [INFO] [stdout] 19 | | } [INFO] [stdout] 20 | | } [INFO] [stdout] | |_- this function should return `Result` or `Option` to accept `?` [INFO] [stdout] | [INFO] [stdout] = help: the trait `Try` is not implemented for `()` [INFO] [stdout] = note: required by `from_error` [INFO] [stdout] [INFO] [stdout] error[E0277]: the `?` operator can only be used in a function that returns `Result` or `Option` (or another type that implements `Try`) [INFO] [stdout] --> src/audio_device.rs:44:1 [INFO] [stdout] | [INFO] [stdout] 2 | / fn main() { [INFO] [stdout] 3 | | use std::thread; [INFO] [stdout] 4 | | [INFO] [stdout] 5 | | let mut device=AudioDevice::default_with_sps(44100)?; [INFO] [stdout] 6 | | device.start_recording()?; [INFO] [stdout] | | ^^^^^^^^^^^^^^^^^^^^^^^^^ cannot use the `?` operator in a function that returns `()` [INFO] [stdout] ... | [INFO] [stdout] 19 | | } [INFO] [stdout] 20 | | } [INFO] [stdout] | |_- this function should return `Result` or `Option` to accept `?` [INFO] [stdout] | [INFO] [stdout] = help: the trait `Try` is not implemented for `()` [INFO] [stdout] = note: required by `from_error` [INFO] [stdout] [INFO] [stdout] error[E0277]: the `?` operator can only be used in a function that returns `Result` or `Option` (or another type that implements `Try`) [INFO] [stdout] --> src/audio_device.rs:47:11 [INFO] [stdout] | [INFO] [stdout] 2 | / fn main() { [INFO] [stdout] 3 | | use std::thread; [INFO] [stdout] 4 | | [INFO] [stdout] 5 | | let mut device=AudioDevice::default_with_sps(44100)?; [INFO] [stdout] ... | [INFO] [stdout] 9 | | match device.read(&mut buffer[..])? { [INFO] [stdout] | | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ cannot use the `?` operator in a function that returns `()` [INFO] [stdout] ... | [INFO] [stdout] 19 | | } [INFO] [stdout] 20 | | } [INFO] [stdout] | |_- this function should return `Result` or `Option` to accept `?` [INFO] [stdout] | [INFO] [stdout] = help: the trait `Try` is not implemented for `()` [INFO] [stdout] = note: required by `from_error` [INFO] [stdout] [INFO] [stdout] error: aborting due to 7 previous errors; 1 warning emitted [INFO] [stdout] [INFO] [stdout] Some errors have detailed explanations: E0277, E0425, E0433, E0586. [INFO] [stdout] For more information about an error, try `rustc --explain E0277`. [INFO] [stdout] Couldn't compile the test. [INFO] [stdout] [INFO] [stdout] failures: [INFO] [stdout] src/audio_device.rs - audio_device::AudioDevice::default_with_sps (line 40) [INFO] [stdout] src/audio_device.rs - audio_device::AudioDevice::stop_recording (line 122) [INFO] [stdout] [INFO] [stdout] test result: FAILED. 0 passed; 2 failed; 0 ignored; 0 measured; 0 filtered out [INFO] [stdout] [INFO] running `Command { std: "docker" "inspect" "13fbd0d4cbe15a594812f2ff34e402548af9099d5a52cbf90893b28cc08776ec", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "13fbd0d4cbe15a594812f2ff34e402548af9099d5a52cbf90893b28cc08776ec", kill_on_drop: false }` [INFO] [stdout] 13fbd0d4cbe15a594812f2ff34e402548af9099d5a52cbf90893b28cc08776ec