[INFO] fetching crate rfs_br 1.0.2...
[INFO] linting rfs_br-1.0.2 against nightly for clippy-nonminimal_bool-denied
[INFO] extracting crate rfs_br 1.0.2 into /workspace/builds/worker-2-tc1/source
[INFO] started tweaking crates.io crate rfs_br 1.0.2
[INFO] removed 0 missing tests
[INFO] finished tweaking crates.io crate rfs_br 1.0.2
[INFO] tweaked toml for crates.io crate rfs_br 1.0.2 written to /workspace/builds/worker-2-tc1/source/Cargo.toml
[INFO] validating manifest of crates.io crate rfs_br 1.0.2 on toolchain nightly
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+nightly" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate crates.io crate rfs_br 1.0.2 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" "+nightly" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+nightly" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] ea1b7dcd938323c82340d733fdaf6366e537bf85d83b042510ee80f1362035d2
[INFO] running `Command { std: "docker" "start" "-a" "ea1b7dcd938323c82340d733fdaf6366e537bf85d83b042510ee80f1362035d2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "ea1b7dcd938323c82340d733fdaf6366e537bf85d83b042510ee80f1362035d2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ea1b7dcd938323c82340d733fdaf6366e537bf85d83b042510ee80f1362035d2", kill_on_drop: false }`
[INFO] [stdout] ea1b7dcd938323c82340d733fdaf6366e537bf85d83b042510ee80f1362035d2
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/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" "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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+nightly" "clippy" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 75262fd8a848ed7e22d8d5d02534e81587b4ae88ab6340c24d3c037cc2c4add4
[INFO] running `Command { std: "docker" "start" "-a" "75262fd8a848ed7e22d8d5d02534e81587b4ae88ab6340c24d3c037cc2c4add4", kill_on_drop: false }`
[INFO] [stderr]     Checking rfs_br v1.0.2 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unnecessary use of `.write(true)` because there is `.append(true)`
[INFO] [stdout]   --> src/file_system.rs:60:43
[INFO] [stdout]    |
[INFO] [stdout] 60 |         let mut f = fs::OpenOptions::new().write(true).append(true).open(file)?;
[INFO] [stdout]    |                                           ^^^^^^^^^^^^ help: remove `.write(true)`
[INFO] [stdout]    |
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#ineffective_open_options
[INFO] [stdout]    = note: `#[warn(clippy::ineffective_open_options)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary use of `.write(true)` because there is `.append(true)`
[INFO] [stdout]   --> src/file_system.rs:60:43
[INFO] [stdout]    |
[INFO] [stdout] 60 |         let mut f = fs::OpenOptions::new().write(true).append(true).open(file)?;
[INFO] [stdout]    |                                           ^^^^^^^^^^^^ help: remove `.write(true)`
[INFO] [stdout]    |
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#ineffective_open_options
[INFO] [stdout]    = note: `#[warn(clippy::ineffective_open_options)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: this boolean expression can be simplified
[INFO] [stdout]   --> tests/file_system_test.rs:19:13
[INFO] [stdout]    |
[INFO] [stdout] 19 |     assert!(!file_system.read_file(&(test_dir.to_owned()+ "/"+ file)).is_ok());
[INFO] [stdout]    |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try: `file_system.read_file(&(test_dir.to_owned()+ "/"+ file)).is_err()`
[INFO] [stdout]    |
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#nonminimal_bool
[INFO] [stdout]    = note: `#[warn(clippy::nonminimal_bool)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unneeded `return` statement
[INFO] [stdout]   --> tests/file_system_test.rs:22:5
[INFO] [stdout]    |
[INFO] [stdout] 22 |     return content.as_bytes();
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stdout]    = note: `#[warn(clippy::needless_return)]` on by default
[INFO] [stdout] help: remove `return`
[INFO] [stdout]    |
[INFO] [stdout] 22 -     return content.as_bytes();
[INFO] [stdout] 22 +     content.as_bytes()
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.22s
[INFO] running `Command { std: "docker" "inspect" "75262fd8a848ed7e22d8d5d02534e81587b4ae88ab6340c24d3c037cc2c4add4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "75262fd8a848ed7e22d8d5d02534e81587b4ae88ab6340c24d3c037cc2c4add4", kill_on_drop: false }`
[INFO] [stdout] 75262fd8a848ed7e22d8d5d02534e81587b4ae88ab6340c24d3c037cc2c4add4