[INFO] fetching crate generic_logger 0.4.0...
[INFO] checking generic_logger-0.4.0 against master#8a703520e80d87d4423c01f9d4fbc9e5f6533a02 for pr-154205-1
[INFO] extracting crate generic_logger 0.4.0 into /workspace/builds/worker-2-tc1/source
[INFO] started tweaking crates.io crate generic_logger 0.4.0
[INFO] finished tweaking crates.io crate generic_logger 0.4.0
[INFO] tweaked toml for crates.io crate generic_logger 0.4.0 written to /workspace/builds/worker-2-tc1/source/Cargo.toml
[INFO] validating manifest of crates.io crate generic_logger 0.4.0 on toolchain 8a703520e80d87d4423c01f9d4fbc9e5f6533a02
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+8a703520e80d87d4423c01f9d4fbc9e5f6533a02" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+8a703520e80d87d4423c01f9d4fbc9e5f6533a02" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+8a703520e80d87d4423c01f9d4fbc9e5f6533a02" "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-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" "+8a703520e80d87d4423c01f9d4fbc9e5f6533a02" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 59d614132f60913fd4ee5df65e8fc9d2d0cb79a99e5ba9e028d587b26268abca
[INFO] running `Command { std: "docker" "start" "-a" "59d614132f60913fd4ee5df65e8fc9d2d0cb79a99e5ba9e028d587b26268abca", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "59d614132f60913fd4ee5df65e8fc9d2d0cb79a99e5ba9e028d587b26268abca", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "59d614132f60913fd4ee5df65e8fc9d2d0cb79a99e5ba9e028d587b26268abca", kill_on_drop: false }`
[INFO] [stdout] 59d614132f60913fd4ee5df65e8fc9d2d0cb79a99e5ba9e028d587b26268abca
[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" "+8a703520e80d87d4423c01f9d4fbc9e5f6533a02" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] b222cc2b2645d35dad2422e3813779394afa50a8abb279619c8086c61eb1e747
[INFO] running `Command { std: "docker" "start" "-a" "b222cc2b2645d35dad2422e3813779394afa50a8abb279619c8086c61eb1e747", kill_on_drop: false }`
[INFO] [stderr]     Checking generic_logger v0.4.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused imports: `fs::File` and `io::Write`
[INFO] [stdout]  --> src/logger.rs:1:11
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::{fs::File, io::Write};
[INFO] [stdout]   |           ^^^^^^^^  ^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/fileio_logger.rs:13:13
[INFO] [stdout]    |
[INFO] [stdout] 13 |         let mut file = OpenOptions::new()
[INFO] [stdout]    |             ----^^^^
[INFO] [stdout]    |             |
[INFO] [stdout]    |             help: remove this `mut`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_mut)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `fs::File` and `io::Write`
[INFO] [stdout]  --> src/logger.rs:1:11
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::{fs::File, io::Write};
[INFO] [stdout]   |           ^^^^^^^^  ^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/fileio_logger.rs:13:13
[INFO] [stdout]    |
[INFO] [stdout] 13 |         let mut file = OpenOptions::new()
[INFO] [stdout]    |             ----^^^^
[INFO] [stdout]    |             |
[INFO] [stdout]    |             help: remove this `mut`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_mut)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.15s
[INFO] running `Command { std: "docker" "inspect" "b222cc2b2645d35dad2422e3813779394afa50a8abb279619c8086c61eb1e747", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b222cc2b2645d35dad2422e3813779394afa50a8abb279619c8086c61eb1e747", kill_on_drop: false }`
[INFO] [stdout] b222cc2b2645d35dad2422e3813779394afa50a8abb279619c8086c61eb1e747