[INFO] fetching crate btfs 0.0.4...
[INFO] building btfs-0.0.4 against master#11663cd3bfefef7d34e8f0892c250bf698049392+rustflags=-Dtail-expr-drop-order for pr-134523
[INFO] extracting crate btfs 0.0.4 into /workspace/builds/worker-4-tc1/source
[INFO] validating manifest of crates.io crate btfs 0.0.4 on toolchain 11663cd3bfefef7d34e8f0892c250bf698049392
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+11663cd3bfefef7d34e8f0892c250bf698049392" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate btfs 0.0.4
[INFO] finished tweaking crates.io crate btfs 0.0.4
[INFO] tweaked toml for crates.io crate btfs 0.0.4 written to /workspace/builds/worker-4-tc1/source/Cargo.toml
[INFO] crate crates.io crate btfs 0.0.4 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" "+11663cd3bfefef7d34e8f0892c250bf698049392" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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:f3a9d4ad9d972b27faf3965f35b62e55ba32bbce8f20bc8fe909558a86702fde" "/opt/rustwide/cargo-home/bin/cargo" "+11663cd3bfefef7d34e8f0892c250bf698049392" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 2f24042d5553f4e14353fe845006f646d5ce31528de0598f260e2472606f4a94
[INFO] running `Command { std: "docker" "start" "-a" "2f24042d5553f4e14353fe845006f646d5ce31528de0598f260e2472606f4a94", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "2f24042d5553f4e14353fe845006f646d5ce31528de0598f260e2472606f4a94", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "2f24042d5553f4e14353fe845006f646d5ce31528de0598f260e2472606f4a94", kill_on_drop: false }`
[INFO] [stdout] 2f24042d5553f4e14353fe845006f646d5ce31528de0598f260e2472606f4a94
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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 -Dtail-expr-drop-order" "-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:f3a9d4ad9d972b27faf3965f35b62e55ba32bbce8f20bc8fe909558a86702fde" "/opt/rustwide/cargo-home/bin/cargo" "+11663cd3bfefef7d34e8f0892c250bf698049392" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] caf48d383f5e852078d701ef04c40ecda8f42863812d95486eba7781858ba03d
[INFO] running `Command { std: "docker" "start" "-a" "caf48d383f5e852078d701ef04c40ecda8f42863812d95486eba7781858ba03d", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.62
[INFO] [stderr]    Compiling memchr v2.2.1
[INFO] [stderr]    Compiling log v0.4.8
[INFO] [stderr]    Compiling cfg-if v0.1.10
[INFO] [stderr]    Compiling pkg-config v0.3.16
[INFO] [stderr]    Compiling lazy_static v1.4.0
[INFO] [stderr]    Compiling regex-syntax v0.6.12
[INFO] [stderr]    Compiling quick-error v1.2.2
[INFO] [stderr]    Compiling termcolor v1.0.5
[INFO] [stderr]    Compiling thread-scoped v1.0.2
[INFO] [stderr]    Compiling thread_local v0.3.6
[INFO] [stderr]    Compiling humantime v1.3.0
[INFO] [stderr]    Compiling log v0.3.9
[INFO] [stderr]    Compiling fuse v0.3.1
[INFO] [stderr]    Compiling aho-corasick v0.7.6
[INFO] [stderr]    Compiling atty v0.2.13
[INFO] [stderr]    Compiling time v0.1.42
[INFO] [stderr]    Compiling regex v1.3.1
[INFO] [stderr]    Compiling env_logger v0.6.2
[INFO] [stderr]    Compiling btfs v0.0.4 (/opt/rustwide/workdir)
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/lib.rs:187:13
[INFO] [stdout]     |
[INFO] [stdout] 187 |         let mut file_attrs = self.attrs.get_mut(&ino).ok_or(Error::NoEntry)?;
[INFO] [stdout]     |             ----^^^^^^^^^^
[INFO] [stdout]     |             |
[INFO] [stdout]     |             help: remove this `mut`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_mut)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 3.42s
[INFO] running `Command { std: "docker" "inspect" "caf48d383f5e852078d701ef04c40ecda8f42863812d95486eba7781858ba03d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "caf48d383f5e852078d701ef04c40ecda8f42863812d95486eba7781858ba03d", kill_on_drop: false }`
[INFO] [stdout] caf48d383f5e852078d701ef04c40ecda8f42863812d95486eba7781858ba03d
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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 -Dtail-expr-drop-order" "-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:f3a9d4ad9d972b27faf3965f35b62e55ba32bbce8f20bc8fe909558a86702fde" "/opt/rustwide/cargo-home/bin/cargo" "+11663cd3bfefef7d34e8f0892c250bf698049392" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] ea9518c3fe99e5bc791c98807a80a8219206e265acd211eca41560682a6bd4b0
[INFO] running `Command { std: "docker" "start" "-a" "ea9518c3fe99e5bc791c98807a80a8219206e265acd211eca41560682a6bd4b0", kill_on_drop: false }`
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/lib.rs:187:13
[INFO] [stdout]     |
[INFO] [stdout] 187 |         let mut file_attrs = self.attrs.get_mut(&ino).ok_or(Error::NoEntry)?;
[INFO] [stdout]     |             ----^^^^^^^^^^
[INFO] [stdout]     |             |
[INFO] [stdout]     |             help: remove this `mut`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_mut)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]    Compiling btfs v0.0.4 (/opt/rustwide/workdir)
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/lib.rs:187:13
[INFO] [stdout]     |
[INFO] [stdout] 187 |         let mut file_attrs = self.attrs.get_mut(&ino).ok_or(Error::NoEntry)?;
[INFO] [stdout]     |             ----^^^^^^^^^^
[INFO] [stdout]     |             |
[INFO] [stdout]     |             help: remove this `mut`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_mut)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.36s
[INFO] running `Command { std: "docker" "inspect" "ea9518c3fe99e5bc791c98807a80a8219206e265acd211eca41560682a6bd4b0", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ea9518c3fe99e5bc791c98807a80a8219206e265acd211eca41560682a6bd4b0", kill_on_drop: false }`
[INFO] [stdout] ea9518c3fe99e5bc791c98807a80a8219206e265acd211eca41560682a6bd4b0