[INFO] fetching crate subprocess 0.2.8...
[INFO] checking subprocess-0.2.8 against try#cac44d9528e3bbbdaa1537d187bd489ccc5de18c for pr-91141
[INFO] extracting crate subprocess 0.2.8 into /workspace/builds/worker-11/source
[INFO] validating manifest of crates.io crate subprocess 0.2.8 on toolchain cac44d9528e3bbbdaa1537d187bd489ccc5de18c
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+cac44d9528e3bbbdaa1537d187bd489ccc5de18c" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate subprocess 0.2.8
[INFO] finished tweaking crates.io crate subprocess 0.2.8
[INFO] tweaked toml for crates.io crate subprocess 0.2.8 written to /workspace/builds/worker-11/source/Cargo.toml
[INFO] crate crates.io crate subprocess 0.2.8 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+cac44d9528e3bbbdaa1537d187bd489ccc5de18c" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-11/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-11/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@sha256:5736fa189c1c60b01babf4b8b698fe57b6ecc41933a7ff2e0b8d7a221459412b" "/opt/rustwide/cargo-home/bin/cargo" "+cac44d9528e3bbbdaa1537d187bd489ccc5de18c" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 881f2c3097c565b52878c5346d3a4724eefebfe2af441bce31b599a6f233c09c
[INFO] running `Command { std: "docker" "start" "-a" "881f2c3097c565b52878c5346d3a4724eefebfe2af441bce31b599a6f233c09c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "881f2c3097c565b52878c5346d3a4724eefebfe2af441bce31b599a6f233c09c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "881f2c3097c565b52878c5346d3a4724eefebfe2af441bce31b599a6f233c09c", kill_on_drop: false }`
[INFO] [stdout] 881f2c3097c565b52878c5346d3a4724eefebfe2af441bce31b599a6f233c09c
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-11/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-11/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" "-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@sha256:5736fa189c1c60b01babf4b8b698fe57b6ecc41933a7ff2e0b8d7a221459412b" "/opt/rustwide/cargo-home/bin/cargo" "+cac44d9528e3bbbdaa1537d187bd489ccc5de18c" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 26e8aefceeb9c965d1858c8021f4dd264af66f4e0660a1886498ad5f0a022ffd
[INFO] running `Command { std: "docker" "start" "-a" "26e8aefceeb9c965d1858c8021f4dd264af66f4e0660a1886498ad5f0a022ffd", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.98
[INFO] [stderr]     Checking remove_dir_all v0.5.3
[INFO] [stderr]     Checking rand v0.4.6
[INFO] [stderr]     Checking subprocess v0.2.8 (/opt/rustwide/workdir)
[INFO] [stdout] warning: field is never read: `ext`
[INFO] [stdout]   --> src/popen.rs:74:25
[INFO] [stdout]    |
[INFO] [stdout] 74 |     Running { pid: u32, ext: os::ExtChildState },
[INFO] [stdout]    |                         ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `strings`
[INFO] [stdout]   --> src/posix.rs:68:5
[INFO] [stdout]    |
[INFO] [stdout] 68 |     strings: Vec<CString>,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Checking tempdir v0.3.7
[INFO] [stdout] warning: field is never read: `ext`
[INFO] [stdout]   --> src/popen.rs:74:25
[INFO] [stdout]    |
[INFO] [stdout] 74 |     Running { pid: u32, ext: os::ExtChildState },
[INFO] [stdout]    |                         ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `strings`
[INFO] [stdout]   --> src/posix.rs:68:5
[INFO] [stdout]    |
[INFO] [stdout] 68 |     strings: Vec<CString>,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 4.04s
[INFO] running `Command { std: "docker" "inspect" "26e8aefceeb9c965d1858c8021f4dd264af66f4e0660a1886498ad5f0a022ffd", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "26e8aefceeb9c965d1858c8021f4dd264af66f4e0660a1886498ad5f0a022ffd", kill_on_drop: false }`
[INFO] [stdout] 26e8aefceeb9c965d1858c8021f4dd264af66f4e0660a1886498ad5f0a022ffd