[INFO] updating cached repository cg505/gethostkeys
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/cg505/gethostkeys
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/cg505/gethostkeys" "work/ex/pr-60039-1/sources/master#e305df1846a6d985315917ae0c81b74af8b4e641/gh/cg505/gethostkeys"`
[INFO] [stderr] Cloning into 'work/ex/pr-60039-1/sources/master#e305df1846a6d985315917ae0c81b74af8b4e641/gh/cg505/gethostkeys'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/cg505/gethostkeys" "work/ex/pr-60039-1/sources/try#99a7498759a22b5684caf798a98b7e90ad9d2443/gh/cg505/gethostkeys"`
[INFO] [stderr] Cloning into 'work/ex/pr-60039-1/sources/try#99a7498759a22b5684caf798a98b7e90ad9d2443/gh/cg505/gethostkeys'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 8b76c2d8a0be0ad5dc5df730e0f177075c4b2816
[INFO] sha for GitHub repo cg505/gethostkeys: 8b76c2d8a0be0ad5dc5df730e0f177075c4b2816
[INFO] validating manifest of cg505/gethostkeys on toolchain master#e305df1846a6d985315917ae0c81b74af8b4e641
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+e305df1846a6d985315917ae0c81b74af8b4e641-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of cg505/gethostkeys on toolchain try#99a7498759a22b5684caf798a98b7e90ad9d2443
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+99a7498759a22b5684caf798a98b7e90ad9d2443-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing cg505/gethostkeys
[INFO] finished frobbing cg505/gethostkeys
[INFO] frobbed toml for cg505/gethostkeys written to work/ex/pr-60039-1/sources/master#e305df1846a6d985315917ae0c81b74af8b4e641/gh/cg505/gethostkeys/Cargo.toml
[INFO] started frobbing cg505/gethostkeys
[INFO] finished frobbing cg505/gethostkeys
[INFO] frobbed toml for cg505/gethostkeys written to work/ex/pr-60039-1/sources/try#99a7498759a22b5684caf798a98b7e90ad9d2443/gh/cg505/gethostkeys/Cargo.toml
[INFO] crate cg505/gethostkeys already has a lockfile, it will not be regenerated
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+e305df1846a6d985315917ae0c81b74af8b4e641-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+99a7498759a22b5684caf798a98b7e90ad9d2443-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] checking cg505/gethostkeys against master#e305df1846a6d985315917ae0c81b74af8b4e641 for pr-60039-1
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-60039-1/worker-3/master#e305df1846a6d985315917ae0c81b74af8b4e641:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-60039-1/sources/master#e305df1846a6d985315917ae0c81b74af8b4e641/gh/cg505/gethostkeys:/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=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" "+e305df1846a6d985315917ae0c81b74af8b4e641-alt" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stdout] 47a6fcba90f6f3309207c08a11589b59e298697811072d802c0124cee0ad420a
[INFO] running `"docker" "start" "-a" "47a6fcba90f6f3309207c08a11589b59e298697811072d802c0124cee0ad420a"`
[INFO] [stderr]    Compiling curl-sys v0.4.15
[INFO] [stderr]     Checking libz-sys v1.0.25
[INFO] [stderr]     Checking curl v0.4.19
[INFO] [stderr]     Checking gethostkeys v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: value assigned to `dest` is never read
[INFO] [stderr]   --> src/main.rs:93:11
[INFO] [stderr]    |
[INFO] [stderr] 93 |         let mut dest = String::new();
[INFO] [stderr]    |                 ^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(unused_assignments)] on by default
[INFO] [stderr]    = help: maybe it is overwritten before being read?
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/main.rs:13:6
[INFO] [stderr]    |
[INFO] [stderr] 13 |     let mut file = match 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/main.rs:22:6
[INFO] [stderr]    |
[INFO] [stderr] 22 |     let mut reader = BufReader::new(file);
[INFO] [stderr]    |         ----^^^^^^
[INFO] [stderr]    |         |
[INFO] [stderr]    |         help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/main.rs:46:6
[INFO] [stderr]    |
[INFO] [stderr] 46 |     let mut file = match OpenOptions::new()
[INFO] [stderr]    |         ----^^^^
[INFO] [stderr]    |         |
[INFO] [stderr]    |         help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: value assigned to `dest` is never read
[INFO] [stderr]   --> src/main.rs:93:11
[INFO] [stderr]    |
[INFO] [stderr] 93 |         let mut dest = String::new();
[INFO] [stderr]    |                 ^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(unused_assignments)] on by default
[INFO] [stderr]    = help: maybe it is overwritten before being read?
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/main.rs:13:6
[INFO] [stderr]    |
[INFO] [stderr] 13 |     let mut file = match 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/main.rs:22:6
[INFO] [stderr]    |
[INFO] [stderr] 22 |     let mut reader = BufReader::new(file);
[INFO] [stderr]    |         ----^^^^^^
[INFO] [stderr]    |         |
[INFO] [stderr]    |         help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/main.rs:46:6
[INFO] [stderr]    |
[INFO] [stderr] 46 |     let mut file = match OpenOptions::new()
[INFO] [stderr]    |         ----^^^^
[INFO] [stderr]    |         |
[INFO] [stderr]    |         help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 16.60s
[INFO] running `"docker" "inspect" "47a6fcba90f6f3309207c08a11589b59e298697811072d802c0124cee0ad420a"`
[INFO] running `"docker" "rm" "-f" "47a6fcba90f6f3309207c08a11589b59e298697811072d802c0124cee0ad420a"`
[INFO] [stdout] 47a6fcba90f6f3309207c08a11589b59e298697811072d802c0124cee0ad420a