[INFO] fetching crate fcntl 0.1.0...
[INFO] checking fcntl-0.1.0 against try#07fecb9cf34c4979a772ba38c99d6d9144768413 for pr-87710
[INFO] extracting crate fcntl 0.1.0 into /workspace/builds/worker-63/source
[INFO] validating manifest of crates.io crate fcntl 0.1.0 on toolchain 07fecb9cf34c4979a772ba38c99d6d9144768413
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+07fecb9cf34c4979a772ba38c99d6d9144768413" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate fcntl 0.1.0
[INFO] finished tweaking crates.io crate fcntl 0.1.0
[INFO] tweaked toml for crates.io crate fcntl 0.1.0 written to /workspace/builds/worker-63/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+07fecb9cf34c4979a772ba38c99d6d9144768413" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+07fecb9cf34c4979a772ba38c99d6d9144768413" "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-63/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-63/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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+07fecb9cf34c4979a772ba38c99d6d9144768413" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] d37d646825665a226bd2c72e3d772255c34a900f937ec35d92b1207412b93599
[INFO] running `Command { std: "docker" "start" "-a" "d37d646825665a226bd2c72e3d772255c34a900f937ec35d92b1207412b93599", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "d37d646825665a226bd2c72e3d772255c34a900f937ec35d92b1207412b93599", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d37d646825665a226bd2c72e3d772255c34a900f937ec35d92b1207412b93599", kill_on_drop: false }`
[INFO] [stdout] d37d646825665a226bd2c72e3d772255c34a900f937ec35d92b1207412b93599
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-63/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-63/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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+07fecb9cf34c4979a772ba38c99d6d9144768413" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 97ea8477d28de44bfc24b282631f319ad0e8c9db14b61c429ec45f29aeb5230c
[INFO] running `Command { std: "docker" "start" "-a" "97ea8477d28de44bfc24b282631f319ad0e8c9db14b61c429ec45f29aeb5230c", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.100
[INFO] [stderr]     Checking fcntl v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unreachable pattern
[INFO] [stdout]    --> src/lib.rs:132:17
[INFO] [stdout]     |
[INFO] [stdout] 132 |                 _ => Err(FcntlError::InvalidArgForCmd),
[INFO] [stdout]     |                 ^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unreachable_patterns)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unreachable pattern
[INFO] [stdout]    --> src/lib.rs:173:9
[INFO] [stdout]     |
[INFO] [stdout] 173 |         Ok(_) => Err(FcntlError::Internal),
[INFO] [stdout]     |         ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unreachable pattern
[INFO] [stdout]    --> src/lib.rs:132:17
[INFO] [stdout]     |
[INFO] [stdout] 132 |                 _ => Err(FcntlError::InvalidArgForCmd),
[INFO] [stdout]     |                 ^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unreachable_patterns)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unreachable pattern
[INFO] [stdout]    --> src/lib.rs:173:9
[INFO] [stdout]     |
[INFO] [stdout] 173 |         Ok(_) => Err(FcntlError::Internal),
[INFO] [stdout]     |         ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unreachable pattern
[INFO] [stdout]    --> src/lib.rs:213:9
[INFO] [stdout]     |
[INFO] [stdout] 213 |         Ok(_) => Err(FcntlError::Internal),
[INFO] [stdout]     |         ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unreachable pattern
[INFO] [stdout]    --> src/lib.rs:253:9
[INFO] [stdout]     |
[INFO] [stdout] 253 |         Ok(_) => Err(FcntlError::Internal),
[INFO] [stdout]     |         ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unreachable pattern
[INFO] [stdout]    --> src/lib.rs:213:9
[INFO] [stdout]     |
[INFO] [stdout] 213 |         Ok(_) => Err(FcntlError::Internal),
[INFO] [stdout]     |         ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unreachable pattern
[INFO] [stdout]    --> src/lib.rs:253:9
[INFO] [stdout]     |
[INFO] [stdout] 253 |         Ok(_) => Err(FcntlError::Internal),
[INFO] [stdout]     |         ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `file`
[INFO] [stdout]    --> src/lib.rs:369:17
[INFO] [stdout]     |
[INFO] [stdout] 369 |             let file = OpenOptions::new().write(true).create(true).open(LOCK_FILE_NAME).unwrap();
[INFO] [stdout]     |                 ^^^^ help: if this is intentional, prefix it with an underscore: `_file`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 4 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 5 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.17s
[INFO] running `Command { std: "docker" "inspect" "97ea8477d28de44bfc24b282631f319ad0e8c9db14b61c429ec45f29aeb5230c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "97ea8477d28de44bfc24b282631f319ad0e8c9db14b61c429ec45f29aeb5230c", kill_on_drop: false }`
[INFO] [stdout] 97ea8477d28de44bfc24b282631f319ad0e8c9db14b61c429ec45f29aeb5230c