[INFO] cloning repository https://github.com/fpindia/pass-the-butter
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/fpindia/pass-the-butter" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ffpindia%2Fpass-the-butter", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ffpindia%2Fpass-the-butter'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 635569198d261ff8513c6325348f59b01a474d90
[INFO] checking fpindia/pass-the-butter against try#4f260f0f20b3133d20cfb50353c0221943af5796+rustflags=-Dunmustuse_in_always_ok for pr-148577
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ffpindia%2Fpass-the-butter" "/workspace/builds/worker-4-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-4-tc2/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/fpindia/pass-the-butter
[INFO] finished tweaking git repo https://github.com/fpindia/pass-the-butter
[INFO] tweaked toml for git repo https://github.com/fpindia/pass-the-butter written to /workspace/builds/worker-4-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/fpindia/pass-the-butter 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 git repo https://github.com/fpindia/pass-the-butter 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] d7d8739f203940f01f6a584f8b9ab356c54931b3be484061d8ba9b86b2d31d70
[INFO] running `Command { std: "docker" "start" "-a" "d7d8739f203940f01f6a584f8b9ab356c54931b3be484061d8ba9b86b2d31d70", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "d7d8739f203940f01f6a584f8b9ab356c54931b3be484061d8ba9b86b2d31d70", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d7d8739f203940f01f6a584f8b9ab356c54931b3be484061d8ba9b86b2d31d70", kill_on_drop: false }`
[INFO] [stdout] d7d8739f203940f01f6a584f8b9ab356c54931b3be484061d8ba9b86b2d31d70
[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] d9dd933a1e8ed16463a5221d3983275b1fefb17a14958a5b30ab6954aa853241
[INFO] running `Command { std: "docker" "start" "-a" "d9dd933a1e8ed16463a5221d3983275b1fefb17a14958a5b30ab6954aa853241", kill_on_drop: false }`
[INFO] [stderr]     Checking bitflags v2.5.0
[INFO] [stderr]     Checking linux-raw-sys v0.4.13
[INFO] [stderr]     Checking fastrand v2.0.2
[INFO] [stderr]    Compiling rustix v0.38.32
[INFO] [stderr]     Checking libloading v0.8.3
[INFO] [stderr]     Checking inotify-sys v0.1.5
[INFO] [stderr]     Checking filetime v0.2.23
[INFO] [stderr]     Checking mio v0.8.11
[INFO] [stderr]     Checking crossbeam-channel v0.5.12
[INFO] [stderr]     Checking inotify v0.9.6
[INFO] [stderr]     Checking notify v5.2.0
[INFO] [stderr]     Checking notify-debouncer-mini v0.2.1
[INFO] [stderr]     Checking tempfile v3.10.1
[INFO] [stderr]     Checking pass-the-butter v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused variable: `debouncer`
[INFO] [stdout]   --> src/main.rs:21:9
[INFO] [stdout]    |
[INFO] [stdout] 21 |     let debouncer = start_watch(
[INFO] [stdout]    |         ^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_debouncer`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<PathBuf, Infallible>
[INFO] [stdout]   --> src/main.rs:33:25
[INFO] [stdout]    |
[INFO] [stdout] 33 |                         PathBuf::from_str(&src_path).ok(),
[INFO] [stdout]    |                         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: requested on the command line with `-D unmustuse-in-always-ok`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `debouncer`
[INFO] [stdout]   --> src/main.rs:21:9
[INFO] [stdout]    |
[INFO] [stdout] 21 |     let debouncer = start_watch(
[INFO] [stdout]    |         ^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_debouncer`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `pass-the-butter` (bin "pass-the-butter" test) due to 1 previous error; 1 warning emitted
[INFO] [stdout] error: this type will no longer be must used: Result<PathBuf, Infallible>
[INFO] [stdout]   --> src/main.rs:33:25
[INFO] [stdout]    |
[INFO] [stdout] 33 |                         PathBuf::from_str(&src_path).ok(),
[INFO] [stdout]    |                         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: requested on the command line with `-D unmustuse-in-always-ok`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: could not compile `pass-the-butter` (bin "pass-the-butter") due to 1 previous error; 1 warning emitted
[INFO] running `Command { std: "docker" "inspect" "d9dd933a1e8ed16463a5221d3983275b1fefb17a14958a5b30ab6954aa853241", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d9dd933a1e8ed16463a5221d3983275b1fefb17a14958a5b30ab6954aa853241", kill_on_drop: false }`
[INFO] [stdout] d9dd933a1e8ed16463a5221d3983275b1fefb17a14958a5b30ab6954aa853241