[INFO] updating cached repository rust-osdev/bootimage
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/rust-osdev/bootimage
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/rust-osdev/bootimage" "work/ex/beta-1.37-6/sources/1.36.0/gh/rust-osdev/bootimage"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.37-6/sources/1.36.0/gh/rust-osdev/bootimage'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/rust-osdev/bootimage" "work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/rust-osdev/bootimage"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.37-6/sources/beta-2019-07-23/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 1.36.0
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.36.0" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of rust-osdev/bootimage on toolchain beta-2019-07-23
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-07-23" "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/beta-1.37-6/sources/1.36.0/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/beta-1.37-6/sources/beta-2019-07-23/gh/rust-osdev/bootimage/Cargo.toml
[INFO] crate rust-osdev/bootimage already has a lockfile, it will not be regenerated
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.36.0" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-07-23" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] testing rust-osdev/bootimage against beta-2019-07-23 for beta-1.37-6
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-2/beta-2019-07-23:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/rust-osdev/bootimage:/opt/crater/workdir:ro,Z" "-v" "/mnt/big/crater/work/local/cargo-home:/opt/crater/cargo-home:ro,Z" "-v" "/mnt/big/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=warn" "-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" "+beta-2019-07-23" "build" "--frozen"`
[INFO] [stdout] 897a686f97a8006e6c0ea981ae998677c677ae8d8eaf6f57019f4ac8eb811ea5
[INFO] running `"docker" "start" "-a" "897a686f97a8006e6c0ea981ae998677c677ae8d8eaf6f57019f4ac8eb811ea5"`
[INFO] [stderr]    Compiling llvm-tools v0.1.1
[INFO] [stderr]    Compiling wait-timeout v0.2.0
[INFO] [stderr]    Compiling locate-cargo-manifest v0.1.0
[INFO] [stderr]    Compiling crossbeam-epoch v0.3.1
[INFO] [stderr]    Compiling syn v0.15.29
[INFO] [stderr]    Compiling serde_json v1.0.24
[INFO] [stderr]    Compiling semver v0.9.0
[INFO] [stderr]    Compiling crossbeam-deque v0.2.0
[INFO] [stderr]    Compiling rayon-core v1.4.1
[INFO] [stderr]    Compiling rayon v1.0.3
[INFO] [stderr]    Compiling serde_derive v1.0.89
[INFO] [stderr]    Compiling cargo_metadata v0.7.4
[INFO] [stderr]    Compiling 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: 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 41.76s
[INFO] running `"docker" "inspect" "897a686f97a8006e6c0ea981ae998677c677ae8d8eaf6f57019f4ac8eb811ea5"`
[INFO] running `"docker" "rm" "-f" "897a686f97a8006e6c0ea981ae998677c677ae8d8eaf6f57019f4ac8eb811ea5"`
[INFO] [stdout] 897a686f97a8006e6c0ea981ae998677c677ae8d8eaf6f57019f4ac8eb811ea5
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-2/beta-2019-07-23:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/rust-osdev/bootimage:/opt/crater/workdir:ro,Z" "-v" "/mnt/big/crater/work/local/cargo-home:/opt/crater/cargo-home:ro,Z" "-v" "/mnt/big/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=warn" "-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" "+beta-2019-07-23" "test" "--frozen" "--no-run"`
[INFO] [stdout] 072f74c5fd4977992572d4cf518426703deb547481e17faaf658578873aebc86
[INFO] running `"docker" "start" "-a" "072f74c5fd4977992572d4cf518426703deb547481e17faaf658578873aebc86"`
[INFO] [stderr]    Compiling 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: 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 3.97s
[INFO] running `"docker" "inspect" "072f74c5fd4977992572d4cf518426703deb547481e17faaf658578873aebc86"`
[INFO] running `"docker" "rm" "-f" "072f74c5fd4977992572d4cf518426703deb547481e17faaf658578873aebc86"`
[INFO] [stdout] 072f74c5fd4977992572d4cf518426703deb547481e17faaf658578873aebc86
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-2/beta-2019-07-23:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/rust-osdev/bootimage:/opt/crater/workdir:ro,Z" "-v" "/mnt/big/crater/work/local/cargo-home:/opt/crater/cargo-home:ro,Z" "-v" "/mnt/big/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=warn" "-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" "+beta-2019-07-23" "test" "--frozen"`
[INFO] [stdout] fa0f5584e9d343113749a7a7e5523a1b5d8a8e76430f2d837584f9f881d9856e
[INFO] running `"docker" "start" "-a" "fa0f5584e9d343113749a7a7e5523a1b5d8a8e76430f2d837584f9f881d9856e"`
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.07s
[INFO] [stderr]      Running /opt/crater/target/debug/deps/bootimage-65393a9cdf5086cb
[INFO] [stderr]      Running /opt/crater/target/debug/deps/bootimage-4782f276c6d8094c
[INFO] [stdout] 
[INFO] [stderr]      Running /opt/crater/target/debug/deps/cargo_bootimage-18065eb060792364
[INFO] [stdout] running 0 tests
[INFO] [stderr]    Doc-tests bootimage
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] running `"docker" "inspect" "fa0f5584e9d343113749a7a7e5523a1b5d8a8e76430f2d837584f9f881d9856e"`
[INFO] running `"docker" "rm" "-f" "fa0f5584e9d343113749a7a7e5523a1b5d8a8e76430f2d837584f9f881d9856e"`
[INFO] [stdout] fa0f5584e9d343113749a7a7e5523a1b5d8a8e76430f2d837584f9f881d9856e