[INFO] fetching crate usbd_mass_storage 0.1.0...
[INFO] checking usbd_mass_storage-0.1.0 against try#4f260f0f20b3133d20cfb50353c0221943af5796+rustflags=-Dunmustuse_in_always_ok for pr-148577
[INFO] extracting crate usbd_mass_storage 0.1.0 into /workspace/builds/worker-5-tc2/source
[INFO] started tweaking crates.io crate usbd_mass_storage 0.1.0
[INFO] finished tweaking crates.io crate usbd_mass_storage 0.1.0
[INFO] tweaked toml for crates.io crate usbd_mass_storage 0.1.0 written to /workspace/builds/worker-5-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate usbd_mass_storage 0.1.0 on toolchain 4f260f0f20b3133d20cfb50353c0221943af5796
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+4f260f0f20b3133d20cfb50353c0221943af5796" "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" "+4f260f0f20b3133d20cfb50353c0221943af5796" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]      Locking 13 packages to latest compatible versions
[INFO] [stderr]       Adding embedded-hal v0.2.7 (available: v1.0.0)
[INFO] [stderr]       Adding nb v0.1.3 (available: v1.1.0)
[INFO] [stderr]       Adding packing v0.1.0 (available: v0.2.0)
[INFO] [stderr]       Adding usb-device v0.2.9 (available: v0.3.2)
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+4f260f0f20b3133d20cfb50353c0221943af5796" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-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" "+4f260f0f20b3133d20cfb50353c0221943af5796" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] e440fffb49a3fcadf5331a74c7ec52f041b96c63ddf06a17c9de27b8f26479e0
[INFO] running `Command { std: "docker" "start" "-a" "e440fffb49a3fcadf5331a74c7ec52f041b96c63ddf06a17c9de27b8f26479e0", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "e440fffb49a3fcadf5331a74c7ec52f041b96c63ddf06a17c9de27b8f26479e0", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e440fffb49a3fcadf5331a74c7ec52f041b96c63ddf06a17c9de27b8f26479e0", kill_on_drop: false }`
[INFO] [stdout] e440fffb49a3fcadf5331a74c7ec52f041b96c63ddf06a17c9de27b8f26479e0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-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 -Dunmustuse_in_always_ok" "-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" "+4f260f0f20b3133d20cfb50353c0221943af5796" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 27219e26a9c97af6078684d2b1f8679803f39e854c531570cd405ab213f20aee
[INFO] running `Command { std: "docker" "start" "-a" "27219e26a9c97af6078684d2b1f8679803f39e854c531570cd405ab213f20aee", kill_on_drop: false }`
[INFO] [stderr]    Compiling syn v1.0.109
[INFO] [stderr]     Checking nb v1.1.0
[INFO] [stderr]     Checking itm_logger v0.1.2
[INFO] [stderr]     Checking usb-device v0.2.9
[INFO] [stderr]     Checking nb v0.1.3
[INFO] [stderr]     Checking embedded-hal v0.2.7
[INFO] [stderr]    Compiling packing_codegen v0.1.0
[INFO] [stderr]     Checking packing v0.1.0
[INFO] [stderr]     Checking usbd_mass_storage v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `itm_logger::*`
[INFO] [stdout]   --> src/lib.rs:27:13
[INFO] [stdout]    |
[INFO] [stdout] 27 |     pub use itm_logger::*;
[INFO] [stdout]    |             ^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `itm_logger::*`
[INFO] [stdout]   --> src/lib.rs:27:13
[INFO] [stdout]    |
[INFO] [stdout] 27 |     pub use itm_logger::*;
[INFO] [stdout]    |             ^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: ControlFlow<Result<core::convert::Infallible, core::convert::Infallible>, [u8; 1]>
[INFO] [stdout]  --> src/interface_subclass.rs:7:45
[INFO] [stdout]   |
[INFO] [stdout] 7 | #[derive(Clone, Copy, Eq, PartialEq, Debug, Packed)]
[INFO] [stdout]   |                                             ^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: requested on the command line with `-D unmustuse-in-always-ok`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<[u8; 1], core::convert::Infallible>
[INFO] [stdout]  --> src/interface_subclass.rs:7:45
[INFO] [stdout]   |
[INFO] [stdout] 7 | #[derive(Clone, Copy, Eq, PartialEq, Debug, Packed)]
[INFO] [stdout]   |                                             ^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: this error originates in the derive macro `Packed` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: ControlFlow<Result<core::convert::Infallible, core::convert::Infallible>, u8>
[INFO] [stdout]  --> src/interface_subclass.rs:7:45
[INFO] [stdout]   |
[INFO] [stdout] 7 | #[derive(Clone, Copy, Eq, PartialEq, Debug, Packed)]
[INFO] [stdout]   |                                             ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<u8, core::convert::Infallible>
[INFO] [stdout]  --> src/interface_subclass.rs:7:45
[INFO] [stdout]   |
[INFO] [stdout] 7 | #[derive(Clone, Copy, Eq, PartialEq, Debug, Packed)]
[INFO] [stdout]   |                                             ^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: this error originates in the derive macro `Packed` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: ControlFlow<Result<core::convert::Infallible, core::convert::Infallible>, [u8; 1]>
[INFO] [stdout]  --> src/interface_protocol.rs:7:45
[INFO] [stdout]   |
[INFO] [stdout] 7 | #[derive(Clone, Copy, Eq, PartialEq, Debug, Packed)]
[INFO] [stdout]   |                                             ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<[u8; 1], core::convert::Infallible>
[INFO] [stdout]  --> src/interface_protocol.rs:7:45
[INFO] [stdout]   |
[INFO] [stdout] 7 | #[derive(Clone, Copy, Eq, PartialEq, Debug, Packed)]
[INFO] [stdout]   |                                             ^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: this error originates in the derive macro `Packed` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: ControlFlow<Result<core::convert::Infallible, core::convert::Infallible>, u8>
[INFO] [stdout]  --> src/interface_protocol.rs:7:45
[INFO] [stdout]   |
[INFO] [stdout] 7 | #[derive(Clone, Copy, Eq, PartialEq, Debug, Packed)]
[INFO] [stdout]   |                                             ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<u8, core::convert::Infallible>
[INFO] [stdout]  --> src/interface_protocol.rs:7:45
[INFO] [stdout]   |
[INFO] [stdout] 7 | #[derive(Clone, Copy, Eq, PartialEq, Debug, Packed)]
[INFO] [stdout]   |                                             ^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: this error originates in the derive macro `Packed` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: ControlFlow<Result<core::convert::Infallible, core::convert::Infallible>, [u8; 1]>
[INFO] [stdout]  --> src/interface_subclass.rs:7:45
[INFO] [stdout]   |
[INFO] [stdout] 7 | #[derive(Clone, Copy, Eq, PartialEq, Debug, Packed)]
[INFO] [stdout]   |                                             ^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: requested on the command line with `-D unmustuse-in-always-ok`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<[u8; 1], core::convert::Infallible>
[INFO] [stdout]  --> src/interface_subclass.rs:7:45
[INFO] [stdout]   |
[INFO] [stdout] 7 | #[derive(Clone, Copy, Eq, PartialEq, Debug, Packed)]
[INFO] [stdout]   |                                             ^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: this error originates in the derive macro `Packed` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: ControlFlow<Result<core::convert::Infallible, core::convert::Infallible>, u8>
[INFO] [stdout]  --> src/interface_subclass.rs:7:45
[INFO] [stdout]   |
[INFO] [stdout] 7 | #[derive(Clone, Copy, Eq, PartialEq, Debug, Packed)]
[INFO] [stdout]   |                                             ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<u8, core::convert::Infallible>
[INFO] [stdout]  --> src/interface_subclass.rs:7:45
[INFO] [stdout]   |
[INFO] [stdout] 7 | #[derive(Clone, Copy, Eq, PartialEq, Debug, Packed)]
[INFO] [stdout]   |                                             ^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: this error originates in the derive macro `Packed` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: ControlFlow<Result<core::convert::Infallible, core::convert::Infallible>, [u8; 1]>
[INFO] [stdout]  --> src/interface_protocol.rs:7:45
[INFO] [stdout]   |
[INFO] [stdout] 7 | #[derive(Clone, Copy, Eq, PartialEq, Debug, Packed)]
[INFO] [stdout]   |                                             ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<[u8; 1], core::convert::Infallible>
[INFO] [stdout]  --> src/interface_protocol.rs:7:45
[INFO] [stdout]   |
[INFO] [stdout] 7 | #[derive(Clone, Copy, Eq, PartialEq, Debug, Packed)]
[INFO] [stdout]   |                                             ^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: this error originates in the derive macro `Packed` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: ControlFlow<Result<core::convert::Infallible, core::convert::Infallible>, u8>
[INFO] [stdout]  --> src/interface_protocol.rs:7:45
[INFO] [stdout]   |
[INFO] [stdout] 7 | #[derive(Clone, Copy, Eq, PartialEq, Debug, Packed)]
[INFO] [stdout]   |                                             ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<u8, core::convert::Infallible>
[INFO] [stdout]  --> src/interface_protocol.rs:7:45
[INFO] [stdout]   |
[INFO] [stdout] 7 | #[derive(Clone, Copy, Eq, PartialEq, Debug, Packed)]
[INFO] [stdout]   |                                             ^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: this error originates in the derive macro `Packed` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `usbd_mass_storage` (lib) due to 8 previous errors; 1 warning emitted
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: could not compile `usbd_mass_storage` (lib test) due to 8 previous errors; 1 warning emitted
[INFO] running `Command { std: "docker" "inspect" "27219e26a9c97af6078684d2b1f8679803f39e854c531570cd405ab213f20aee", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "27219e26a9c97af6078684d2b1f8679803f39e854c531570cd405ab213f20aee", kill_on_drop: false }`
[INFO] [stdout] 27219e26a9c97af6078684d2b1f8679803f39e854c531570cd405ab213f20aee