[INFO] fetching crate justone 0.3.0...
[INFO] checking justone-0.3.0 against master#38352b01ae4af9300be03b805d6db68c45e51068 for pr-129864
[INFO] extracting crate justone 0.3.0 into /workspace/builds/worker-2-tc1/source
[INFO] validating manifest of crates.io crate justone 0.3.0 on toolchain 38352b01ae4af9300be03b805d6db68c45e51068
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+38352b01ae4af9300be03b805d6db68c45e51068" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate justone 0.3.0
[INFO] finished tweaking crates.io crate justone 0.3.0
[INFO] tweaked toml for crates.io crate justone 0.3.0 written to /workspace/builds/worker-2-tc1/source/Cargo.toml
[INFO] crate crates.io crate justone 0.3.0 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" "+38352b01ae4af9300be03b805d6db68c45e51068" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded number_prefix v0.3.0
[INFO] [stderr]   Downloaded console v0.13.0
[INFO] [stderr]   Downloaded terminal_size v0.1.15
[INFO] [stderr]   Downloaded indicatif v0.15.0
[INFO] [stderr]   Downloaded twox-hash v1.6.0
[INFO] [stderr]   Downloaded filecmp v0.2.0
[INFO] [stderr]   Downloaded regex v1.4.2
[INFO] [stderr]   Downloaded regex-syntax v0.6.21
[INFO] [stderr]   Downloaded libc v0.2.80
[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:ceb6ea022f8a89cebbe621bb4987e73a935bd40dfbb726f832cfff4742a5b95a" "/opt/rustwide/cargo-home/bin/cargo" "+38352b01ae4af9300be03b805d6db68c45e51068" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 96794debcae54a65e211a4bcae11e75eff3d6a34db4393fe24c4f9036313ecda
[INFO] running `Command { std: "docker" "start" "-a" "96794debcae54a65e211a4bcae11e75eff3d6a34db4393fe24c4f9036313ecda", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "96794debcae54a65e211a4bcae11e75eff3d6a34db4393fe24c4f9036313ecda", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "96794debcae54a65e211a4bcae11e75eff3d6a34db4393fe24c4f9036313ecda", kill_on_drop: false }`
[INFO] [stdout] 96794debcae54a65e211a4bcae11e75eff3d6a34db4393fe24c4f9036313ecda
[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:ceb6ea022f8a89cebbe621bb4987e73a935bd40dfbb726f832cfff4742a5b95a" "/opt/rustwide/cargo-home/bin/cargo" "+38352b01ae4af9300be03b805d6db68c45e51068" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] e5784ad39f1f68013caddb88f396a9dcea5d8d22766ca2583e7d9636b1a06969
[INFO] running `Command { std: "docker" "start" "-a" "e5784ad39f1f68013caddb88f396a9dcea5d8d22766ca2583e7d9636b1a06969", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.80
[INFO] [stderr]    Compiling getrandom v0.1.15
[INFO] [stderr]     Checking unicode-width v0.1.8
[INFO] [stderr]     Checking ppv-lite86 v0.2.10
[INFO] [stderr]    Compiling bitflags v1.2.1
[INFO] [stderr]     Checking regex-syntax v0.6.21
[INFO] [stderr]     Checking ansi_term v0.11.0
[INFO] [stderr]     Checking number_prefix v0.3.0
[INFO] [stderr]     Checking textwrap v0.11.0
[INFO] [stderr]     Checking vec_map v0.8.2
[INFO] [stderr]     Checking strsim v0.8.0
[INFO] [stderr]     Checking walkdir v2.3.1
[INFO] [stderr]     Checking filecmp v0.2.0
[INFO] [stderr]     Checking terminal_size v0.1.15
[INFO] [stderr]     Checking atty v0.2.14
[INFO] [stderr]     Checking clap v2.33.3
[INFO] [stderr]     Checking rand_core v0.5.1
[INFO] [stderr]     Checking rand_chacha v0.2.2
[INFO] [stderr]     Checking regex v1.4.2
[INFO] [stderr]     Checking rand v0.7.3
[INFO] [stderr]     Checking console v0.13.0
[INFO] [stderr]     Checking twox-hash v1.6.0
[INFO] [stderr]     Checking indicatif v0.15.0
[INFO] [stderr]     Checking justone v0.3.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/lib.rs:486:13
[INFO] [stdout]     |
[INFO] [stdout] 486 |         let mut file_info = self.file_info.get_mut(file_index).unwrap();
[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] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/lib.rs:502:13
[INFO] [stdout]     |
[INFO] [stdout] 502 |         let mut file_info = self.file_info.get_mut(file_index).unwrap();
[INFO] [stdout]     |             ----^^^^^^^^^
[INFO] [stdout]     |             |
[INFO] [stdout]     |             help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `id` and `size` are never read
[INFO] [stdout]    --> src/lib.rs:143:5
[INFO] [stdout]     |
[INFO] [stdout] 142 | struct FileInfo {
[INFO] [stdout]     |        -------- fields in this struct
[INFO] [stdout] 143 |     id: FileIndex,
[INFO] [stdout]     |     ^^
[INFO] [stdout] 144 |     path: PathBuf,
[INFO] [stdout] 145 |     size: FileSize,
[INFO] [stdout]     |     ^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `FileInfo` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout]     = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 3 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/lib.rs:486:13
[INFO] [stdout]     |
[INFO] [stdout] 486 |         let mut file_info = self.file_info.get_mut(file_index).unwrap();
[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] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/lib.rs:502:13
[INFO] [stdout]     |
[INFO] [stdout] 502 |         let mut file_info = self.file_info.get_mut(file_index).unwrap();
[INFO] [stdout]     |             ----^^^^^^^^^
[INFO] [stdout]     |             |
[INFO] [stdout]     |             help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `id` and `size` are never read
[INFO] [stdout]    --> src/lib.rs:143:5
[INFO] [stdout]     |
[INFO] [stdout] 142 | struct FileInfo {
[INFO] [stdout]     |        -------- fields in this struct
[INFO] [stdout] 143 |     id: FileIndex,
[INFO] [stdout]     |     ^^
[INFO] [stdout] 144 |     path: PathBuf,
[INFO] [stdout] 145 |     size: FileSize,
[INFO] [stdout]     |     ^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `FileInfo` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout]     = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 3 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 7.56s
[INFO] running `Command { std: "docker" "inspect" "e5784ad39f1f68013caddb88f396a9dcea5d8d22766ca2583e7d9636b1a06969", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e5784ad39f1f68013caddb88f396a9dcea5d8d22766ca2583e7d9636b1a06969", kill_on_drop: false }`
[INFO] [stdout] e5784ad39f1f68013caddb88f396a9dcea5d8d22766ca2583e7d9636b1a06969