[INFO] updating cached repository yurrriq/rust-in-action
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/yurrriq/rust-in-action
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/yurrriq/rust-in-action" "work/ex/pr-63565/sources/master#c43d03a19f326f4a323569328cc501e86eb6d22e/gh/yurrriq/rust-in-action"`
[INFO] [stderr] Cloning into 'work/ex/pr-63565/sources/master#c43d03a19f326f4a323569328cc501e86eb6d22e/gh/yurrriq/rust-in-action'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/yurrriq/rust-in-action" "work/ex/pr-63565/sources/try#75eff020d0923c035c2fe220db4a0465cd847048/gh/yurrriq/rust-in-action"`
[INFO] [stderr] Cloning into 'work/ex/pr-63565/sources/try#75eff020d0923c035c2fe220db4a0465cd847048/gh/yurrriq/rust-in-action'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] b972d1bc6b8409c446ff7310117b96eabbf52cd8
[INFO] sha for GitHub repo yurrriq/rust-in-action: b972d1bc6b8409c446ff7310117b96eabbf52cd8
[INFO] validating manifest of yurrriq/rust-in-action on toolchain master#c43d03a19f326f4a323569328cc501e86eb6d22e
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+c43d03a19f326f4a323569328cc501e86eb6d22e-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of yurrriq/rust-in-action on toolchain try#75eff020d0923c035c2fe220db4a0465cd847048
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+75eff020d0923c035c2fe220db4a0465cd847048-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing yurrriq/rust-in-action
[INFO] finished frobbing yurrriq/rust-in-action
[INFO] frobbed toml for yurrriq/rust-in-action written to work/ex/pr-63565/sources/master#c43d03a19f326f4a323569328cc501e86eb6d22e/gh/yurrriq/rust-in-action/Cargo.toml
[INFO] started frobbing yurrriq/rust-in-action
[INFO] finished frobbing yurrriq/rust-in-action
[INFO] frobbed toml for yurrriq/rust-in-action written to work/ex/pr-63565/sources/try#75eff020d0923c035c2fe220db4a0465cd847048/gh/yurrriq/rust-in-action/Cargo.toml
[INFO] crate yurrriq/rust-in-action already has a lockfile, it will not be regenerated
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+c43d03a19f326f4a323569328cc501e86eb6d22e-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+75eff020d0923c035c2fe220db4a0465cd847048-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] checking yurrriq/rust-in-action against master#c43d03a19f326f4a323569328cc501e86eb6d22e for pr-63565
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-63565/worker-2/master#c43d03a19f326f4a323569328cc501e86eb6d22e:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-63565/sources/master#c43d03a19f326f4a323569328cc501e86eb6d22e/gh/yurrriq/rust-in-action:/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" "+c43d03a19f326f4a323569328cc501e86eb6d22e-alt" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stdout] d255377d50ea97e2d841bf7de4fd743de24ad80197ca9539499081d99732b0b9
[INFO] running `"docker" "start" "-a" "d255377d50ea97e2d841bf7de4fd743de24ad80197ca9539499081d99732b0b9"`
[INFO] [stderr]    Compiling libc v0.2.44
[INFO] [stderr]    Compiling regex v1.1.0
[INFO] [stderr]    Compiling memchr v2.1.1
[INFO] [stderr]     Checking thread_local v0.3.6
[INFO] [stderr]     Checking regex-syntax v0.6.4
[INFO] [stderr]     Checking atty v0.2.11
[INFO] [stderr]     Checking rand v0.6.1
[INFO] [stderr]     Checking clap v2.32.0
[INFO] [stderr]     Checking aho-corasick v0.6.9
[INFO] [stderr]     Checking rust-in-action v0.3.20 (/opt/crater/workdir)
[INFO] [stderr] warning: unused variable: `sat_a`
[INFO] [stderr]   --> src/bin/ch4-check-sat.rs:22:9
[INFO] [stderr]    |
[INFO] [stderr] 22 |     let sat_a = check_status(sat_a);
[INFO] [stderr]    |         ^^^^^ help: consider prefixing with an underscore: `_sat_a`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `sat_a`
[INFO] [stderr]   --> src/bin/ch4-check-sats.rs:22:9
[INFO] [stderr]    |
[INFO] [stderr] 22 |     let sat_a = check_status(sat_a);
[INFO] [stderr]    |         ^^^^^ help: consider prefixing with an underscore: `_sat_a`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `sat_a`
[INFO] [stderr]   --> src/bin/ch4-check-sat.rs:22:9
[INFO] [stderr]    |
[INFO] [stderr] 22 |     let sat_a = check_status(sat_a);
[INFO] [stderr]    |         ^^^^^ help: consider prefixing with an underscore: `_sat_a`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `sat_a`
[INFO] [stderr]   --> src/bin/ch4-check-sats.rs:22:9
[INFO] [stderr]    |
[INFO] [stderr] 22 |     let sat_a = check_status(sat_a);
[INFO] [stderr]    |         ^^^^^ help: consider prefixing with an underscore: `_sat_a`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 17.09s
[INFO] running `"docker" "inspect" "d255377d50ea97e2d841bf7de4fd743de24ad80197ca9539499081d99732b0b9"`
[INFO] running `"docker" "rm" "-f" "d255377d50ea97e2d841bf7de4fd743de24ad80197ca9539499081d99732b0b9"`
[INFO] [stdout] d255377d50ea97e2d841bf7de4fd743de24ad80197ca9539499081d99732b0b9