[INFO] fetching crate cargo-sysroot 0.8.1...
[INFO] checking cargo-sysroot-0.8.1 against try#4f260f0f20b3133d20cfb50353c0221943af5796+rustflags=-Dunmustuse_in_always_ok for pr-148577
[INFO] extracting crate cargo-sysroot 0.8.1 into /workspace/builds/worker-6-tc2/source
[INFO] started tweaking crates.io crate cargo-sysroot 0.8.1
[INFO] finished tweaking crates.io crate cargo-sysroot 0.8.1
[INFO] tweaked toml for crates.io crate cargo-sysroot 0.8.1 written to /workspace/builds/worker-6-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate cargo-sysroot 0.8.1 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 cargo-sysroot 0.8.1 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] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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] 0eb0b2a01c89aff199ab70c503d7194e6efc1d5ac4428159ec13b85082511a07
[INFO] running `Command { std: "docker" "start" "-a" "0eb0b2a01c89aff199ab70c503d7194e6efc1d5ac4428159ec13b85082511a07", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "0eb0b2a01c89aff199ab70c503d7194e6efc1d5ac4428159ec13b85082511a07", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "0eb0b2a01c89aff199ab70c503d7194e6efc1d5ac4428159ec13b85082511a07", kill_on_drop: false }`
[INFO] [stdout] 0eb0b2a01c89aff199ab70c503d7194e6efc1d5ac4428159ec13b85082511a07
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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] e7f715e6c95f31cda021cda16066b6e4c1c720086ca821de4716a04b072d8351
[INFO] running `Command { std: "docker" "start" "-a" "e7f715e6c95f31cda021cda16066b6e4c1c720086ca821de4716a04b072d8351", kill_on_drop: false }`
[INFO] [stderr]    Compiling syn v1.0.86
[INFO] [stderr]    Compiling libc v0.2.113
[INFO] [stderr]    Compiling serde v1.0.135
[INFO] [stderr]    Compiling serde_derive v1.0.135
[INFO] [stderr]     Checking unicode-width v0.1.9
[INFO] [stderr]    Compiling unicode-segmentation v1.8.0
[INFO] [stderr]    Compiling anyhow v1.0.53
[INFO] [stderr]     Checking fs_extra v1.2.0
[INFO] [stderr]     Checking fastrand v1.7.0
[INFO] [stderr]    Compiling quote v1.0.15
[INFO] [stderr]     Checking textwrap v0.11.0
[INFO] [stderr]    Compiling heck v0.3.3
[INFO] [stderr]    Compiling proc-macro-error-attr v1.0.4
[INFO] [stderr]     Checking atty v0.2.14
[INFO] [stderr]     Checking remove_dir_all v0.7.0
[INFO] [stderr]     Checking tempfile v3.3.0
[INFO] [stderr]     Checking clap v2.34.0
[INFO] [stderr]     Checking toml v0.5.8
[INFO] [stderr]    Compiling proc-macro-error v1.0.4
[INFO] [stderr]    Compiling structopt-derive v0.4.18
[INFO] [stderr]     Checking structopt v0.3.26
[INFO] [stderr]     Checking cargo-toml2 v1.3.2
[INFO] [stderr]     Checking cargo-sysroot v0.8.1 (/opt/rustwide/workdir)
[INFO] [stdout] warning: field `target_dir` is never read
[INFO] [stdout]   --> src/args.rs:13:9
[INFO] [stdout]    |
[INFO] [stdout]  6 | pub struct Sysroot {
[INFO] [stdout]    |            ------- field in this struct
[INFO] [stdout] ...
[INFO] [stdout] 13 |     pub target_dir: PathBuf,
[INFO] [stdout]    |         ^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Sysroot` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: std::result::Result<PathBuf, Infallible>
[INFO] [stdout]  --> src/args.rs:7:5
[INFO] [stdout]   |
[INFO] [stdout] 7 | /     /// Path to `Cargo.toml`
[INFO] [stdout] 8 | |     #[structopt(long, default_value = "./Cargo.toml")]
[INFO] [stdout] 9 | |     pub manifest_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] [stdout] error: this type will no longer be must used: std::result::Result<PathBuf, Infallible>
[INFO] [stdout]   --> src/args.rs:11:5
[INFO] [stdout]    |
[INFO] [stdout] 11 | /     /// Path to target directory.
[INFO] [stdout] 12 | |     #[structopt(long, default_value = "./target/sysroot/target")]
[INFO] [stdout] 13 | |     pub target_dir: PathBuf,
[INFO] [stdout]    | |___________________________^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: std::result::Result<PathBuf, Infallible>
[INFO] [stdout]   --> src/args.rs:15:5
[INFO] [stdout]    |
[INFO] [stdout] 15 | /     /// Path to sysroot directory.
[INFO] [stdout] 16 | |     #[structopt(long, default_value = "./target/sysroot")]
[INFO] [stdout] 17 | |     pub sysroot_dir: PathBuf,
[INFO] [stdout]    | |____________________________^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: std::result::Result<PathBuf, Infallible>
[INFO] [stdout]   --> src/args.rs:19:5
[INFO] [stdout]    |
[INFO] [stdout] 19 | /     /// Target to build for.
[INFO] [stdout] 20 | |     ///
[INFO] [stdout] 21 | |     /// Uses the value from `package.metadata.cargo-sysroot.target` as a
[INFO] [stdout] 22 | |     /// default.
[INFO] [stdout] 23 | |     #[structopt(long)]
[INFO] [stdout] 24 | |     pub target: Option<PathBuf>,
[INFO] [stdout]    | |_______________________________^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: std::result::Result<PathBuf, Infallible>
[INFO] [stdout]   --> src/args.rs:30:5
[INFO] [stdout]    |
[INFO] [stdout] 30 | /     /// Path to the rust sources.
[INFO] [stdout] 31 | |     ///
[INFO] [stdout] 32 | |     /// If not specified, uses the `rust-src` component from rustup.
[INFO] [stdout] 33 | |     #[structopt(long)]
[INFO] [stdout] 34 | |     pub rust_src_dir: Option<PathBuf>,
[INFO] [stdout]    | |_____________________________________^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `cargo-sysroot` (bin "cargo-sysroot") due to 5 previous errors; 1 warning emitted
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stdout] warning: field `target_dir` is never read
[INFO] [stdout]   --> src/args.rs:13:9
[INFO] [stdout]    |
[INFO] [stdout]  6 | pub struct Sysroot {
[INFO] [stdout]    |            ------- field in this struct
[INFO] [stdout] ...
[INFO] [stdout] 13 |     pub target_dir: PathBuf,
[INFO] [stdout]    |         ^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Sysroot` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: std::result::Result<PathBuf, Infallible>
[INFO] [stdout]  --> src/args.rs:7:5
[INFO] [stdout]   |
[INFO] [stdout] 7 | /     /// Path to `Cargo.toml`
[INFO] [stdout] 8 | |     #[structopt(long, default_value = "./Cargo.toml")]
[INFO] [stdout] 9 | |     pub manifest_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] [stdout] error: this type will no longer be must used: std::result::Result<PathBuf, Infallible>
[INFO] [stdout]   --> src/args.rs:11:5
[INFO] [stdout]    |
[INFO] [stdout] 11 | /     /// Path to target directory.
[INFO] [stdout] 12 | |     #[structopt(long, default_value = "./target/sysroot/target")]
[INFO] [stdout] 13 | |     pub target_dir: PathBuf,
[INFO] [stdout]    | |___________________________^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: std::result::Result<PathBuf, Infallible>
[INFO] [stdout]   --> src/args.rs:15:5
[INFO] [stdout]    |
[INFO] [stdout] 15 | /     /// Path to sysroot directory.
[INFO] [stdout] 16 | |     #[structopt(long, default_value = "./target/sysroot")]
[INFO] [stdout] 17 | |     pub sysroot_dir: PathBuf,
[INFO] [stdout]    | |____________________________^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: std::result::Result<PathBuf, Infallible>
[INFO] [stdout]   --> src/args.rs:19:5
[INFO] [stdout]    |
[INFO] [stdout] 19 | /     /// Target to build for.
[INFO] [stdout] 20 | |     ///
[INFO] [stdout] 21 | |     /// Uses the value from `package.metadata.cargo-sysroot.target` as a
[INFO] [stdout] 22 | |     /// default.
[INFO] [stdout] 23 | |     #[structopt(long)]
[INFO] [stdout] 24 | |     pub target: Option<PathBuf>,
[INFO] [stdout]    | |_______________________________^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: std::result::Result<PathBuf, Infallible>
[INFO] [stdout]   --> src/args.rs:30:5
[INFO] [stdout]    |
[INFO] [stdout] 30 | /     /// Path to the rust sources.
[INFO] [stdout] 31 | |     ///
[INFO] [stdout] 32 | |     /// If not specified, uses the `rust-src` component from rustup.
[INFO] [stdout] 33 | |     #[structopt(long)]
[INFO] [stdout] 34 | |     pub rust_src_dir: Option<PathBuf>,
[INFO] [stdout]    | |_____________________________________^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `cargo-sysroot` (bin "cargo-sysroot" test) due to 5 previous errors; 1 warning emitted
[INFO] running `Command { std: "docker" "inspect" "e7f715e6c95f31cda021cda16066b6e4c1c720086ca821de4716a04b072d8351", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e7f715e6c95f31cda021cda16066b6e4c1c720086ca821de4716a04b072d8351", kill_on_drop: false }`
[INFO] [stdout] e7f715e6c95f31cda021cda16066b6e4c1c720086ca821de4716a04b072d8351
