[INFO] fetching crate cargo-dtc 1.7.6...
[INFO] checking cargo-dtc-1.7.6 against try#4f260f0f20b3133d20cfb50353c0221943af5796+rustflags=-Dunmustuse_in_always_ok for pr-148577
[INFO] extracting crate cargo-dtc 1.7.6 into /workspace/builds/worker-1-tc2/source
[INFO] started tweaking crates.io crate cargo-dtc 1.7.6
[INFO] finished tweaking crates.io crate cargo-dtc 1.7.6
[INFO] tweaked toml for crates.io crate cargo-dtc 1.7.6 written to /workspace/builds/worker-1-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate cargo-dtc 1.7.6 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-dtc 1.7.6 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-1-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-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] 408c2ed2bfddb9f8ecffd3400abf88d6535a5907c09a9eef2a9ba480abd62c13
[INFO] running `Command { std: "docker" "start" "-a" "408c2ed2bfddb9f8ecffd3400abf88d6535a5907c09a9eef2a9ba480abd62c13", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "408c2ed2bfddb9f8ecffd3400abf88d6535a5907c09a9eef2a9ba480abd62c13", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "408c2ed2bfddb9f8ecffd3400abf88d6535a5907c09a9eef2a9ba480abd62c13", kill_on_drop: false }`
[INFO] [stdout] 408c2ed2bfddb9f8ecffd3400abf88d6535a5907c09a9eef2a9ba480abd62c13
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-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] 187007247d0627ebee46b6577f1dfc34ecc723c91c543a2f88c84b0e48f7f9d0
[INFO] running `Command { std: "docker" "start" "-a" "187007247d0627ebee46b6577f1dfc34ecc723c91c543a2f88c84b0e48f7f9d0", kill_on_drop: false }`
[INFO] [stderr]    Compiling cc v1.0.99
[INFO] [stderr]    Compiling cargo-dtc v1.7.6 (/opt/rustwide/workdir)
[INFO] [stdout] error: this type will no longer be must used: Result<PathBuf, Infallible>
[INFO] [stdout]   --> build.rs:19:28
[INFO] [stdout]    |
[INFO] [stdout] 19 |     let mut version_file = std::path::PathBuf::from_str(build_target_dir.as_str()).unwrap();
[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 `cargo-dtc` (build script) due to 1 previous error
[INFO] running `Command { std: "docker" "inspect" "187007247d0627ebee46b6577f1dfc34ecc723c91c543a2f88c84b0e48f7f9d0", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "187007247d0627ebee46b6577f1dfc34ecc723c91c543a2f88c84b0e48f7f9d0", kill_on_drop: false }`
[INFO] [stdout] 187007247d0627ebee46b6577f1dfc34ecc723c91c543a2f88c84b0e48f7f9d0