[INFO] fetching crate dfu-libusb 0.5.4...
[INFO] checking dfu-libusb-0.5.4 against try#4f260f0f20b3133d20cfb50353c0221943af5796+rustflags=-Dunmustuse_in_always_ok for pr-148577
[INFO] extracting crate dfu-libusb 0.5.4 into /workspace/builds/worker-4-tc2/source
[INFO] started tweaking crates.io crate dfu-libusb 0.5.4
[INFO] removed 0 missing examples
[INFO] finished tweaking crates.io crate dfu-libusb 0.5.4
[INFO] tweaked toml for crates.io crate dfu-libusb 0.5.4 written to /workspace/builds/worker-4-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate dfu-libusb 0.5.4 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] crate crates.io crate dfu-libusb 0.5.4 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" "+4f260f0f20b3133d20cfb50353c0221943af5796" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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] 411ffa62c5c8b7707dfae7b13fd3cc772ffc80b33ff84f97cc1f2d1f331c3efb
[INFO] running `Command { std: "docker" "start" "-a" "411ffa62c5c8b7707dfae7b13fd3cc772ffc80b33ff84f97cc1f2d1f331c3efb", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "411ffa62c5c8b7707dfae7b13fd3cc772ffc80b33ff84f97cc1f2d1f331c3efb", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "411ffa62c5c8b7707dfae7b13fd3cc772ffc80b33ff84f97cc1f2d1f331c3efb", kill_on_drop: false }`
[INFO] [stdout] 411ffa62c5c8b7707dfae7b13fd3cc772ffc80b33ff84f97cc1f2d1f331c3efb
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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] b7c4735378c984308f86a0fec716c868813b7b9dc6dab886599ccf12760622a0
[INFO] running `Command { std: "docker" "start" "-a" "b7c4735378c984308f86a0fec716c868813b7b9dc6dab886599ccf12760622a0", kill_on_drop: false }`
[INFO] [stderr]    Compiling unicode-ident v1.0.2
[INFO] [stderr]    Compiling libc v0.2.126
[INFO] [stderr]    Compiling syn v1.0.98
[INFO] [stderr]     Checking once_cell v1.13.0
[INFO] [stderr]    Compiling rusb v0.9.1
[INFO] [stderr]    Compiling anyhow v1.0.58
[INFO] [stderr]    Compiling libusb1-sys v0.6.2
[INFO] [stderr]    Compiling time-macros v0.2.4
[INFO] [stderr]     Checking regex-syntax v0.6.27
[INFO] [stderr]     Checking os_str_bytes v6.2.0
[INFO] [stderr]     Checking itoa v1.0.2
[INFO] [stderr]    Compiling indexmap v1.9.1
[INFO] [stderr]     Checking termcolor v1.1.3
[INFO] [stderr]     Checking bytes v1.2.1
[INFO] [stderr]     Checking pretty-hex v0.3.0
[INFO] [stderr]     Checking textwrap v0.15.0
[INFO] [stderr]    Compiling proc-macro2 v1.0.103
[INFO] [stderr]     Checking number_prefix v0.4.0
[INFO] [stderr]     Checking clap_lex v0.2.4
[INFO] [stderr]    Compiling quote v1.0.41
[INFO] [stderr]    Compiling syn v2.0.108
[INFO] [stderr]    Compiling proc-macro-error-attr v1.0.4
[INFO] [stderr]     Checking terminal_size v0.1.17
[INFO] [stderr]     Checking atty v0.2.14
[INFO] [stderr]     Checking time v0.3.11
[INFO] [stderr]     Checking regex v1.6.0
[INFO] [stderr]     Checking console v0.15.1
[INFO] [stderr]     Checking simplelog v0.12.0
[INFO] [stderr]     Checking indicatif v0.16.2
[INFO] [stderr]    Compiling displaydoc v0.2.5
[INFO] [stderr]    Compiling proc-macro-error v1.0.4
[INFO] [stderr]    Compiling thiserror-impl v1.0.31
[INFO] [stderr]    Compiling clap_derive v3.2.15
[INFO] [stderr]     Checking thiserror v1.0.31
[INFO] [stderr]     Checking dfu-core v0.8.0
[INFO] [stderr]     Checking dfu-libusb v0.5.4 (/opt/rustwide/workdir)
[INFO] [stderr]     Checking clap v3.2.16
[INFO] [stdout] error: this type will no longer be must used: Result<PathBuf, Infallible>
[INFO] [stdout]   --> examples/download.rs:11:5
[INFO] [stdout]    |
[INFO] [stdout] 11 |     path: PathBuf,
[INFO] [stdout]    |     ^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: requested on the command line with `-D unmustuse-in-always-ok`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `dfu-libusb` (example "download") due to 1 previous error
[INFO] running `Command { std: "docker" "inspect" "b7c4735378c984308f86a0fec716c868813b7b9dc6dab886599ccf12760622a0", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b7c4735378c984308f86a0fec716c868813b7b9dc6dab886599ccf12760622a0", kill_on_drop: false }`
[INFO] [stdout] b7c4735378c984308f86a0fec716c868813b7b9dc6dab886599ccf12760622a0