[INFO] fetching crate authenticator-ctap2-2021 0.3.2-dev.1...
[INFO] testing authenticator-ctap2-2021-0.3.2-dev.1 against try#c2e32f1c9652b13ed99608599c1e855462f421f3 for pr-146098-7
[INFO] extracting crate authenticator-ctap2-2021 0.3.2-dev.1 into /workspace/builds/worker-7-tc2/source
[INFO] started tweaking crates.io crate authenticator-ctap2-2021 0.3.2-dev.1
[INFO] finished tweaking crates.io crate authenticator-ctap2-2021 0.3.2-dev.1
[INFO] tweaked toml for crates.io crate authenticator-ctap2-2021 0.3.2-dev.1 written to /workspace/builds/worker-7-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate authenticator-ctap2-2021 0.3.2-dev.1 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] crate crates.io crate authenticator-ctap2-2021 0.3.2-dev.1 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" "+c2e32f1c9652b13ed99608599c1e855462f421f3" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-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] d0e22e50fde46c3d871bc77602568a07e1168577989ceeea40e741c1ace1886e
[INFO] running `Command { std: "docker" "start" "-a" "d0e22e50fde46c3d871bc77602568a07e1168577989ceeea40e741c1ace1886e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "d0e22e50fde46c3d871bc77602568a07e1168577989ceeea40e741c1ace1886e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d0e22e50fde46c3d871bc77602568a07e1168577989ceeea40e741c1ace1886e", kill_on_drop: false }`
[INFO] [stdout] d0e22e50fde46c3d871bc77602568a07e1168577989ceeea40e741c1ace1886e
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-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] 51a06685de5fb3246b0300d16e2f75ed937b8fa623f9d6da6b5f62667f4ab50f
[INFO] running `Command { std: "docker" "start" "-a" "51a06685de5fb3246b0300d16e2f75ed937b8fa623f9d6da6b5f62667f4ab50f", kill_on_drop: false }`
[INFO] [stderr]    Compiling pkg-config v0.3.24
[INFO] [stderr]    Compiling syn v1.0.89
[INFO] [stderr]    Compiling typenum v1.15.0
[INFO] [stderr]    Compiling openssl v0.10.38
[INFO] [stderr]    Compiling generic-array v0.14.5
[INFO] [stderr]    Compiling log v0.4.16
[INFO] [stderr]    Compiling getrandom v0.2.7
[INFO] [stderr]    Compiling half v1.8.2
[INFO] [stderr]    Compiling cpufeatures v0.2.2
[INFO] [stderr]    Compiling authenticator-ctap2-2021 v0.3.2-dev.1 (/opt/rustwide/workdir)
[INFO] [stderr]    Compiling runloop v0.1.0
[INFO] [stderr]    Compiling quote v1.0.16
[INFO] [stderr]    Compiling nom v7.1.1
[INFO] [stderr]    Compiling rand_core v0.6.3
[INFO] [stderr]    Compiling openssl-sys v0.9.72
[INFO] [stderr]    Compiling libudev-sys v0.1.4
[INFO] [stderr]    Compiling rand_chacha v0.3.1
[INFO] [stderr]    Compiling rand v0.8.5
[INFO] [stderr]    Compiling libudev v0.2.0
[INFO] [stderr]    Compiling crypto-common v0.1.3
[INFO] [stderr]    Compiling block-buffer v0.10.2
[INFO] [stderr]    Compiling digest v0.10.3
[INFO] [stderr]    Compiling sha2 v0.10.2
[INFO] [stderr]    Compiling serde_derive v1.0.136
[INFO] [stderr]    Compiling serde v1.0.136
[INFO] [stderr]    Compiling serde_bytes v0.11.5
[INFO] [stderr]    Compiling serde_json v1.0.79
[INFO] [stderr]    Compiling serde_cbor v0.11.2
[INFO] [stdout] warning: unexpected `cfg` condition value: `cargo-clippy`
[INFO] [stdout]  --> src/u2fprotocol.rs:5:13
[INFO] [stdout]   |
[INFO] [stdout] 5 | #![cfg_attr(feature = "cargo-clippy", allow(clippy::needless_lifetimes))]
[INFO] [stdout]   |             ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: expected values for `feature` are: `bindgen`, `binding-recompile`, `bytes`, `crypto_dummy`, `crypto_nss`, `crypto_openssl`, `crypto_ring`, `default`, `openssl`, `openssl-sys`, `ring`, `tokio`, `warp`, and `webdriver`
[INFO] [stdout]   = help: consider adding `cargo-clippy` as a feature in `Cargo.toml`
[INFO] [stdout]   = note: see <https://doc.rust-lang.org/nightly/rustc/check-cfg/cargo-specifics.html> for more information about checking conditional configuration
[INFO] [stdout]   = note: `#[warn(unexpected_cfgs)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unexpected `cfg` condition value: `cargo-clippy`
[INFO] [stdout]  --> src/transport/hidproto.rs:8:5
[INFO] [stdout]   |
[INFO] [stdout] 8 |     feature = "cargo-clippy",
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: expected values for `feature` are: `bindgen`, `binding-recompile`, `bytes`, `crypto_dummy`, `crypto_nss`, `crypto_openssl`, `crypto_ring`, `default`, `openssl`, `openssl-sys`, `ring`, `tokio`, `warp`, and `webdriver`
[INFO] [stdout]   = help: consider adding `cargo-clippy` as a feature in `Cargo.toml`
[INFO] [stdout]   = note: see <https://doc.rust-lang.org/nightly/rustc/check-cfg/cargo-specifics.html> for more information about checking conditional configuration
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unexpected `cfg` condition value: `cargo-clippy`
[INFO] [stdout]  --> src/transport/linux/hidraw.rs:4:13
[INFO] [stdout]   |
[INFO] [stdout] 4 | #![cfg_attr(feature = "cargo-clippy", allow(clippy::cast_lossless))]
[INFO] [stdout]   |             ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: expected values for `feature` are: `bindgen`, `binding-recompile`, `bytes`, `crypto_dummy`, `crypto_nss`, `crypto_openssl`, `crypto_ring`, `default`, `openssl`, `openssl-sys`, `ring`, `tokio`, `warp`, and `webdriver`
[INFO] [stdout]   = help: consider adding `cargo-clippy` as a feature in `Cargo.toml`
[INFO] [stdout]   = note: see <https://doc.rust-lang.org/nightly/rustc/check-cfg/cargo-specifics.html> for more information about checking conditional configuration
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unexpected `cfg` condition name: `fuzzing`
[INFO] [stdout]    --> src/lib.rs:110:7
[INFO] [stdout]     |
[INFO] [stdout] 110 | #[cfg(fuzzing)]
[INFO] [stdout]     |       ^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = help: expected names are: `docsrs`, `feature`, and `test` and 31 more
[INFO] [stdout]     = help: consider using a Cargo feature instead
[INFO] [stdout]     = help: or consider adding in `Cargo.toml` the `check-cfg` lint config for the lint:
[INFO] [stdout]              [lints.rust]
[INFO] [stdout]              unexpected_cfgs = { level = "warn", check-cfg = ['cfg(fuzzing)'] }
[INFO] [stdout]     = help: or consider adding `println!("cargo::rustc-check-cfg=cfg(fuzzing)");` to the top of the `build.rs`
[INFO] [stdout]     = note: see <https://doc.rust-lang.org/nightly/rustc/check-cfg/cargo-specifics.html> for more information about checking conditional configuration
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unexpected `cfg` condition name: `fuzzing`
[INFO] [stdout]    --> src/lib.rs:112:7
[INFO] [stdout]     |
[INFO] [stdout] 112 | #[cfg(fuzzing)]
[INFO] [stdout]     |       ^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = help: consider using a Cargo feature instead
[INFO] [stdout]     = help: or consider adding in `Cargo.toml` the `check-cfg` lint config for the lint:
[INFO] [stdout]              [lints.rust]
[INFO] [stdout]              unexpected_cfgs = { level = "warn", check-cfg = ['cfg(fuzzing)'] }
[INFO] [stdout]     = help: or consider adding `println!("cargo::rustc-check-cfg=cfg(fuzzing)");` to the top of the `build.rs`
[INFO] [stdout]     = note: see <https://doc.rust-lang.org/nightly/rustc/check-cfg/cargo-specifics.html> for more information about checking conditional configuration
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unexpected `cfg` condition name: `fuzzing`
[INFO] [stdout]    --> src/lib.rs:114:7
[INFO] [stdout]     |
[INFO] [stdout] 114 | #[cfg(fuzzing)]
[INFO] [stdout]     |       ^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = help: consider using a Cargo feature instead
[INFO] [stdout]     = help: or consider adding in `Cargo.toml` the `check-cfg` lint config for the lint:
[INFO] [stdout]              [lints.rust]
[INFO] [stdout]              unexpected_cfgs = { level = "warn", check-cfg = ['cfg(fuzzing)'] }
[INFO] [stdout]     = help: or consider adding `println!("cargo::rustc-check-cfg=cfg(fuzzing)");` to the top of the `build.rs`
[INFO] [stdout]     = note: see <https://doc.rust-lang.org/nightly/rustc/check-cfg/cargo-specifics.html> for more information about checking conditional configuration
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around closure body
[INFO] [stdout]    --> src/transport/linux/device.rs:174:26
[INFO] [stdout]     |
[INFO] [stdout] 174 |             .map_err(|e| (HIDError::IO(Some(self.path.clone()), e)))?;
[INFO] [stdout]     |                          ^                                        ^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_parens)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]     |
[INFO] [stdout] 174 -             .map_err(|e| (HIDError::IO(Some(self.path.clone()), e)))?;
[INFO] [stdout] 174 +             .map_err(|e| HIDError::IO(Some(self.path.clone()), e))?;
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/statemachine.rs:845:21
[INFO] [stdout]     |
[INFO] [stdout] 845 |                 let mut dev = match Self::init_and_select(info, &selector, false) {
[INFO] [stdout]     |                     ----^^^
[INFO] [stdout]     |                     |
[INFO] [stdout]     |                     help: remove this `mut`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_mut)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `status`
[INFO] [stdout]    --> src/statemachine.rs:844:35
[INFO] [stdout]     |
[INFO] [stdout] 844 |             move |info, selector, status, _alive| {
[INFO] [stdout]     |                                   ^^^^^^ help: if this is intentional, prefix it with an underscore: `_status`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0170]: pattern binding `Timeout` is named the same as one of the variants of the type `std::sync::mpmc::RecvTimeoutError`
[INFO] [stdout]    --> src/manager.rs:144:25
[INFO] [stdout]     |
[INFO] [stdout] 144 |                     Err(Timeout) => { /* continue */ }
[INFO] [stdout]     |                         ^^^^^^^ help: to match on the variant, qualify the path: `std::sync::mpmc::RecvTimeoutError::Timeout`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[deny(bindings_with_variant_name)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unreachable pattern
[INFO] [stdout]    --> src/manager.rs:145:21
[INFO] [stdout]     |
[INFO] [stdout] 144 |                     Err(Timeout) => { /* continue */ }
[INFO] [stdout]     |                     ------------ matches all the relevant values
[INFO] [stdout] 145 |                     Err(RecvTimeoutError::Disconnected) => {
[INFO] [stdout]     |                     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ no value can reach this
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unreachable_patterns)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `Timeout`
[INFO] [stdout]    --> src/manager.rs:144:25
[INFO] [stdout]     |
[INFO] [stdout] 144 |                     Err(Timeout) => { /* continue */ }
[INFO] [stdout]     |                         ^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout] help: you might have meant to pattern match on the similarly named variant `Timeout`
[INFO] [stdout]     |
[INFO] [stdout] 144 |                     Err(std::sync::mpmc::RecvTimeoutError::Timeout) => { /* continue */ }
[INFO] [stdout]     |                         +++++++++++++++++++++++++++++++++++
[INFO] [stdout] help: if this is intentional, prefix it with an underscore
[INFO] [stdout]     |
[INFO] [stdout] 144 |                     Err(_Timeout) => { /* continue */ }
[INFO] [stdout]     |                         +
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `timeout`
[INFO] [stdout]    --> src/manager.rs:272:9
[INFO] [stdout]     |
[INFO] [stdout] 272 |         timeout: u64,
[INFO] [stdout]     |         ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_timeout`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `status`
[INFO] [stdout]    --> src/manager.rs:273:9
[INFO] [stdout]     |
[INFO] [stdout] 273 |         status: Sender<crate::StatusUpdate>,
[INFO] [stdout]     |         ^^^^^^ help: if this is intentional, prefix it with an underscore: `_status`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `callback`
[INFO] [stdout]    --> src/manager.rs:274:9
[INFO] [stdout]     |
[INFO] [stdout] 274 |         callback: StateCallback<crate::Result<crate::InfoResult>>,
[INFO] [stdout]     |         ^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_callback`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0170]: pattern binding `Timeout` is named the same as one of the variants of the type `std::sync::mpmc::RecvTimeoutError`
[INFO] [stdout]    --> src/manager.rs:380:25
[INFO] [stdout]     |
[INFO] [stdout] 380 |                     Err(Timeout) => { /* continue */ }
[INFO] [stdout]     |                         ^^^^^^^ help: to match on the variant, qualify the path: `std::sync::mpmc::RecvTimeoutError::Timeout`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unreachable pattern
[INFO] [stdout]    --> src/manager.rs:381:21
[INFO] [stdout]     |
[INFO] [stdout] 380 |                     Err(Timeout) => { /* continue */ }
[INFO] [stdout]     |                     ------------ matches all the relevant values
[INFO] [stdout] 381 |                     Err(RecvTimeoutError::Disconnected) => {
[INFO] [stdout]     |                     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ no value can reach this
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `Timeout`
[INFO] [stdout]    --> src/manager.rs:380:25
[INFO] [stdout]     |
[INFO] [stdout] 380 |                     Err(Timeout) => { /* continue */ }
[INFO] [stdout]     |                         ^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout] help: you might have meant to pattern match on the similarly named variant `Timeout`
[INFO] [stdout]     |
[INFO] [stdout] 380 |                     Err(std::sync::mpmc::RecvTimeoutError::Timeout) => { /* continue */ }
[INFO] [stdout]     |                         +++++++++++++++++++++++++++++++++++
[INFO] [stdout] help: if this is intentional, prefix it with an underscore
[INFO] [stdout]     |
[INFO] [stdout] 380 |                     Err(_Timeout) => { /* continue */ }
[INFO] [stdout]     |                         +
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait `DeviceSelectorEventMarker` is never used
[INFO] [stdout]   --> src/transport/device_selector.rs:13:7
[INFO] [stdout]    |
[INFO] [stdout] 13 | trait DeviceSelectorEventMarker {}
[INFO] [stdout]    |       ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable `Timeout` should have a snake case name
[INFO] [stdout]    --> src/manager.rs:144:25
[INFO] [stdout]     |
[INFO] [stdout] 144 |                     Err(Timeout) => { /* continue */ }
[INFO] [stdout]     |                         ^^^^^^^ help: convert the identifier to snake case: `timeout`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(non_snake_case)]` (part of `#[warn(nonstandard_style)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable `Timeout` should have a snake case name
[INFO] [stdout]    --> src/manager.rs:380:25
[INFO] [stdout]     |
[INFO] [stdout] 380 |                     Err(Timeout) => { /* continue */ }
[INFO] [stdout]     |                         ^^^^^^^ help: convert the identifier to snake case: `timeout`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused return value of `Box::<T>::from_raw` that must be used
[INFO] [stdout]   --> src/capi.rs:66:9
[INFO] [stdout]    |
[INFO] [stdout] 66 |         Box::from_raw(mgr);
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: call `drop(Box::from_raw(ptr))` if you intend to drop the `Box`
[INFO] [stdout]    = note: `#[warn(unused_must_use)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]    |
[INFO] [stdout] 66 |         let _ = Box::from_raw(mgr);
[INFO] [stdout]    |         +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused return value of `Box::<T>::from_raw` that must be used
[INFO] [stdout]   --> src/capi.rs:97:9
[INFO] [stdout]    |
[INFO] [stdout] 97 |         Box::from_raw(ids);
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: call `drop(Box::from_raw(ptr))` if you intend to drop the `Box`
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]    |
[INFO] [stdout] 97 |         let _ = Box::from_raw(ids);
[INFO] [stdout]    |         +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused return value of `Box::<T>::from_raw` that must be used
[INFO] [stdout]    --> src/capi.rs:132:9
[INFO] [stdout]     |
[INFO] [stdout] 132 |         Box::from_raw(khs);
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: call `drop(Box::from_raw(ptr))` if you intend to drop the `Box`
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]     |
[INFO] [stdout] 132 |         let _ = Box::from_raw(khs);
[INFO] [stdout]     |         +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused return value of `Box::<T>::from_raw` that must be used
[INFO] [stdout]    --> src/capi.rs:222:9
[INFO] [stdout]     |
[INFO] [stdout] 222 |         Box::from_raw(res);
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: call `drop(Box::from_raw(ptr))` if you intend to drop the `Box`
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]     |
[INFO] [stdout] 222 |         let _ = Box::from_raw(res);
[INFO] [stdout]     |         +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused return value of `Box::<T>::from_raw` that must be used
[INFO] [stdout]   --> src/ctap2_capi.rs:92:9
[INFO] [stdout]    |
[INFO] [stdout] 92 |         Box::from_raw(mgr);
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: call `drop(Box::from_raw(ptr))` if you intend to drop the `Box`
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]    |
[INFO] [stdout] 92 |         let _ = Box::from_raw(mgr);
[INFO] [stdout]    |         +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused return value of `Box::<T>::from_raw` that must be used
[INFO] [stdout]    --> src/ctap2_capi.rs:127:9
[INFO] [stdout]     |
[INFO] [stdout] 127 |         Box::from_raw(khs);
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: call `drop(Box::from_raw(ptr))` if you intend to drop the `Box`
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]     |
[INFO] [stdout] 127 |         let _ = Box::from_raw(khs);
[INFO] [stdout]     |         +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0170`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `authenticator-ctap2-2021` (lib) due to 2 previous errors; 25 warnings emitted
[INFO] running `Command { std: "docker" "inspect" "51a06685de5fb3246b0300d16e2f75ed937b8fa623f9d6da6b5f62667f4ab50f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "51a06685de5fb3246b0300d16e2f75ed937b8fa623f9d6da6b5f62667f4ab50f", kill_on_drop: false }`
[INFO] [stdout] 51a06685de5fb3246b0300d16e2f75ed937b8fa623f9d6da6b5f62667f4ab50f
