[INFO] fetching crate jfmt 1.2.1...
[INFO] checking jfmt-1.2.1 against try#4f260f0f20b3133d20cfb50353c0221943af5796+rustflags=-Dunmustuse_in_always_ok for pr-148577
[INFO] extracting crate jfmt 1.2.1 into /workspace/builds/worker-2-tc2/source
[INFO] started tweaking crates.io crate jfmt 1.2.1
[INFO] finished tweaking crates.io crate jfmt 1.2.1
[INFO] tweaked toml for crates.io crate jfmt 1.2.1 written to /workspace/builds/worker-2-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate jfmt 1.2.1 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 jfmt 1.2.1 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" "+4f260f0f20b3133d20cfb50353c0221943af5796" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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] 54e5878351d1e043899fb8d1c4a8f9e37caf443504c5ef40af25b9b8cbb67584
[INFO] running `Command { std: "docker" "start" "-a" "54e5878351d1e043899fb8d1c4a8f9e37caf443504c5ef40af25b9b8cbb67584", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "54e5878351d1e043899fb8d1c4a8f9e37caf443504c5ef40af25b9b8cbb67584", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "54e5878351d1e043899fb8d1c4a8f9e37caf443504c5ef40af25b9b8cbb67584", kill_on_drop: false }`
[INFO] [stdout] 54e5878351d1e043899fb8d1c4a8f9e37caf443504c5ef40af25b9b8cbb67584
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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] 8eb0a5c037b25bead214d7ac3dc989648284a89a5cf559cd3d10b9ef5d9fa9b8
[INFO] running `Command { std: "docker" "start" "-a" "8eb0a5c037b25bead214d7ac3dc989648284a89a5cf559cd3d10b9ef5d9fa9b8", kill_on_drop: false }`
[INFO] [stderr]    Compiling serde v1.0.136
[INFO] [stderr]    Compiling libc v0.2.117
[INFO] [stderr]    Compiling serde_json v1.0.79
[INFO] [stderr]     Checking itoa v1.0.1
[INFO] [stderr]     Checking atty v0.2.14
[INFO] [stderr]     Checking clap v3.0.14
[INFO] [stderr]     Checking serde-transcode v1.1.1
[INFO] [stderr]     Checking jfmt v1.2.1 (/opt/rustwide/workdir)
[INFO] [stdout] error: this type will no longer be must used: Result<PathBuf, Infallible>
[INFO] [stdout]   --> src/main.rs:87:5
[INFO] [stdout]    |
[INFO] [stdout] 87 | /     /// File to output to.  Creates file/directory if needed.  Default is stdout.
[INFO] [stdout] 88 | |     #[clap(short, long)]
[INFO] [stdout] 89 | |     output_file: Option<PathBuf>,
[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<std::string::String, Infallible>
[INFO] [stdout]   --> src/main.rs:91:5
[INFO] [stdout]    |
[INFO] [stdout] 91 | /     /// Path to read for input.  Use - to read from stdin (default behavior).
[INFO] [stdout] 92 | |     #[clap(name = "INPUT_FILE", default_value = "-")]
[INFO] [stdout] 93 | |     input_file: String,
[INFO] [stdout]    | |______________________^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `jfmt` (bin "jfmt" test) due to 2 previous errors
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stdout] error: this type will no longer be must used: Result<PathBuf, Infallible>
[INFO] [stdout]   --> src/main.rs:87:5
[INFO] [stdout]    |
[INFO] [stdout] 87 | /     /// File to output to.  Creates file/directory if needed.  Default is stdout.
[INFO] [stdout] 88 | |     #[clap(short, long)]
[INFO] [stdout] 89 | |     output_file: Option<PathBuf>,
[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<std::string::String, Infallible>
[INFO] [stdout]   --> src/main.rs:91:5
[INFO] [stdout]    |
[INFO] [stdout] 91 | /     /// Path to read for input.  Use - to read from stdin (default behavior).
[INFO] [stdout] 92 | |     #[clap(name = "INPUT_FILE", default_value = "-")]
[INFO] [stdout] 93 | |     input_file: String,
[INFO] [stdout]    | |______________________^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `jfmt` (bin "jfmt") due to 2 previous errors
[INFO] running `Command { std: "docker" "inspect" "8eb0a5c037b25bead214d7ac3dc989648284a89a5cf559cd3d10b9ef5d9fa9b8", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "8eb0a5c037b25bead214d7ac3dc989648284a89a5cf559cd3d10b9ef5d9fa9b8", kill_on_drop: false }`
[INFO] [stdout] 8eb0a5c037b25bead214d7ac3dc989648284a89a5cf559cd3d10b9ef5d9fa9b8
