[INFO] cloning repository rust-osdev/bootimage
[INFO] running `"git" "clone" "--bare" "git://github.com/rust-osdev/bootimage.git" "work/cache/sources/gh/rust-osdev/bootimage"`
[INFO] [stderr] Cloning into bare repository 'work/cache/sources/gh/rust-osdev/bootimage'...
[INFO] running `"git" "clone" "work/cache/sources/gh/rust-osdev/bootimage" "work/ex/pr-62008/sources/master#848e0a23f34aaab3e4a974b031c86ef2a4e4fcc1/gh/rust-osdev/bootimage"`
[INFO] [stderr] Cloning into 'work/ex/pr-62008/sources/master#848e0a23f34aaab3e4a974b031c86ef2a4e4fcc1/gh/rust-osdev/bootimage'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/rust-osdev/bootimage" "work/ex/pr-62008/sources/try#8f81d0bf6baf07b92f1246696722485c4ca0b049/gh/rust-osdev/bootimage"`
[INFO] [stderr] Cloning into 'work/ex/pr-62008/sources/try#8f81d0bf6baf07b92f1246696722485c4ca0b049/gh/rust-osdev/bootimage'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 8c9bbd878350821fc0bd84e69f35f318812f10e9
[INFO] sha for GitHub repo rust-osdev/bootimage: 8c9bbd878350821fc0bd84e69f35f318812f10e9
[INFO] validating manifest of rust-osdev/bootimage on toolchain master#848e0a23f34aaab3e4a974b031c86ef2a4e4fcc1
[INFO] running `"/mnt/big/ec2-user/crater/work/local/cargo-home/bin/cargo" "+848e0a23f34aaab3e4a974b031c86ef2a4e4fcc1-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of rust-osdev/bootimage on toolchain try#8f81d0bf6baf07b92f1246696722485c4ca0b049
[INFO] running `"/mnt/big/ec2-user/crater/work/local/cargo-home/bin/cargo" "+8f81d0bf6baf07b92f1246696722485c4ca0b049-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing rust-osdev/bootimage
[INFO] finished frobbing rust-osdev/bootimage
[INFO] frobbed toml for rust-osdev/bootimage written to work/ex/pr-62008/sources/master#848e0a23f34aaab3e4a974b031c86ef2a4e4fcc1/gh/rust-osdev/bootimage/Cargo.toml
[INFO] started frobbing rust-osdev/bootimage
[INFO] finished frobbing rust-osdev/bootimage
[INFO] frobbed toml for rust-osdev/bootimage written to work/ex/pr-62008/sources/try#8f81d0bf6baf07b92f1246696722485c4ca0b049/gh/rust-osdev/bootimage/Cargo.toml
[INFO] crate rust-osdev/bootimage already has a lockfile, it will not be regenerated
[INFO] running `"/mnt/big/ec2-user/crater/work/local/cargo-home/bin/cargo" "+848e0a23f34aaab3e4a974b031c86ef2a4e4fcc1-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded locate-cargo-manifest v0.1.0
[INFO] running `"/mnt/big/ec2-user/crater/work/local/cargo-home/bin/cargo" "+8f81d0bf6baf07b92f1246696722485c4ca0b049-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] checking rust-osdev/bootimage against try#8f81d0bf6baf07b92f1246696722485c4ca0b049 for pr-62008
[INFO] running `"docker" "create" "-v" "/mnt/big/ec2-user/crater/work/local/target-dirs/pr-62008/worker-0/try#8f81d0bf6baf07b92f1246696722485c4ca0b049:/opt/crater/target:rw,Z" "-v" "/mnt/big/ec2-user/crater/work/ex/pr-62008/sources/try#8f81d0bf6baf07b92f1246696722485c4ca0b049/gh/rust-osdev/bootimage:/opt/crater/workdir:ro,Z" "-v" "/mnt/big/ec2-user/crater/work/local/cargo-home:/opt/crater/cargo-home:ro,Z" "-v" "/mnt/big/ec2-user/crater/work/local/rustup-home:/opt/crater/rustup-home:ro,Z" "-e" "USER_ID=1000" "-e" "SOURCE_DIR=/opt/crater/workdir" "-e" "MAP_USER_ID=1000" "-e" "CARGO_TARGET_DIR=/opt/crater/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/crater/cargo-home" "-e" "RUSTUP_HOME=/opt/crater/rustup-home" "-w" "/opt/crater/workdir" "-m" "1536M" "--network" "none" "rustops/crates-build-env" "/opt/crater/cargo-home/bin/cargo" "+8f81d0bf6baf07b92f1246696722485c4ca0b049-alt" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stdout] fa17d7f0c9f6a790520f6d6b31323354612b677065f79c65bc19e51384a18ead
[INFO] running `"docker" "start" "-a" "fa17d7f0c9f6a790520f6d6b31323354612b677065f79c65bc19e51384a18ead"`
[INFO] [stderr]     Checking error-chain v0.12.0
[INFO] [stderr]     Checking llvm-tools v0.1.1
[INFO] [stderr]     Checking wait-timeout v0.2.0
[INFO] [stderr]     Checking crossbeam-epoch v0.3.1
[INFO] [stderr]     Checking locate-cargo-manifest v0.1.0
[INFO] [stderr]    Compiling syn v0.15.29
[INFO] [stderr]     Checking semver v0.9.0
[INFO] [stderr]     Checking serde_json v1.0.24
[INFO] [stderr]     Checking crossbeam-deque v0.2.0
[INFO] [stderr]     Checking rayon-core v1.4.1
[INFO] [stderr]     Checking rayon v1.0.3
[INFO] [stderr]    Compiling serde_derive v1.0.89
[INFO] [stderr]     Checking cargo_metadata v0.7.4
[INFO] [stderr]     Checking bootimage v0.7.5 (/opt/crater/workdir)
[INFO] [stderr] warning: unused import: `File`
[INFO] [stderr]    --> src/builder.rs:303:27
[INFO] [stderr]     |
[INFO] [stderr] 303 |             use std::fs::{File, OpenOptions};
[INFO] [stderr]     |                           ^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(unused_imports)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `File`
[INFO] [stderr]    --> src/builder.rs:303:27
[INFO] [stderr]     |
[INFO] [stderr] 303 |             use std::fs::{File, OpenOptions};
[INFO] [stderr]     |                           ^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(unused_imports)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/builder.rs:304:17
[INFO] [stderr]     |
[INFO] [stderr] 304 |             let mut file = OpenOptions::new()
[INFO] [stderr]     |                 ----^^^^
[INFO] [stderr]     |                 |
[INFO] [stderr]     |                 help: remove this `mut`
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(unused_mut)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/builder.rs:304:17
[INFO] [stderr]     |
[INFO] [stderr] 304 |             let mut file = OpenOptions::new()
[INFO] [stderr]     |                 ----^^^^
[INFO] [stderr]     |                 |
[INFO] [stderr]     |                 help: remove this `mut`
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(unused_mut)] on by default
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 40.57s
[INFO] running `"docker" "inspect" "fa17d7f0c9f6a790520f6d6b31323354612b677065f79c65bc19e51384a18ead"`
[INFO] running `"docker" "rm" "-f" "fa17d7f0c9f6a790520f6d6b31323354612b677065f79c65bc19e51384a18ead"`
[INFO] [stdout] fa17d7f0c9f6a790520f6d6b31323354612b677065f79c65bc19e51384a18ead