[INFO] updating cached repository CircuitCoder/denigma
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/CircuitCoder/denigma
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/CircuitCoder/denigma" "work/ex/pr-62133/sources/master#5f9c0448dde167128d668da4555879f64e56af1d/gh/CircuitCoder/denigma"`
[INFO] [stderr] Cloning into 'work/ex/pr-62133/sources/master#5f9c0448dde167128d668da4555879f64e56af1d/gh/CircuitCoder/denigma'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/CircuitCoder/denigma" "work/ex/pr-62133/sources/try#8ec8125bea94852768b56958f05da47666c21ab0/gh/CircuitCoder/denigma"`
[INFO] [stderr] Cloning into 'work/ex/pr-62133/sources/try#8ec8125bea94852768b56958f05da47666c21ab0/gh/CircuitCoder/denigma'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] ca49254e524e111e49e3c07c4bdfd7c0de81515e
[INFO] sha for GitHub repo CircuitCoder/denigma: ca49254e524e111e49e3c07c4bdfd7c0de81515e
[INFO] validating manifest of CircuitCoder/denigma on toolchain master#5f9c0448dde167128d668da4555879f64e56af1d
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+5f9c0448dde167128d668da4555879f64e56af1d-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of CircuitCoder/denigma on toolchain try#8ec8125bea94852768b56958f05da47666c21ab0
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+8ec8125bea94852768b56958f05da47666c21ab0-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing CircuitCoder/denigma
[INFO] finished frobbing CircuitCoder/denigma
[INFO] frobbed toml for CircuitCoder/denigma written to work/ex/pr-62133/sources/master#5f9c0448dde167128d668da4555879f64e56af1d/gh/CircuitCoder/denigma/Cargo.toml
[INFO] started frobbing CircuitCoder/denigma
[INFO] finished frobbing CircuitCoder/denigma
[INFO] frobbed toml for CircuitCoder/denigma written to work/ex/pr-62133/sources/try#8ec8125bea94852768b56958f05da47666c21ab0/gh/CircuitCoder/denigma/Cargo.toml
[INFO] crate CircuitCoder/denigma already has a lockfile, it will not be regenerated
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+5f9c0448dde167128d668da4555879f64e56af1d-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+8ec8125bea94852768b56958f05da47666c21ab0-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] checking CircuitCoder/denigma against master#5f9c0448dde167128d668da4555879f64e56af1d for pr-62133
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-62133/worker-4/master#5f9c0448dde167128d668da4555879f64e56af1d:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-62133/sources/master#5f9c0448dde167128d668da4555879f64e56af1d/gh/CircuitCoder/denigma:/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" "+5f9c0448dde167128d668da4555879f64e56af1d-alt" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stdout] 2aa095c976fda7defab638adaffaaa290c284a6cea0a9cb2198677e9cb5f8570
[INFO] running `"docker" "start" "-a" "2aa095c976fda7defab638adaffaaa290c284a6cea0a9cb2198677e9cb5f8570"`
[INFO] [stderr]     Checking serde_json v1.0.39
[INFO] [stderr]     Checking denigma v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: field is never used: `spigots`
[INFO] [stderr]   --> src/main.rs:27:5
[INFO] [stderr]    |
[INFO] [stderr] 27 |     spigots: Option<usize>,
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(dead_code)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]    --> src/main.rs:195:5
[INFO] [stderr]     |
[INFO] [stderr] 195 | /     thread::spawn(move || {
[INFO] [stderr] 196 | |         let mut counter = 0;
[INFO] [stderr] 197 | |         let mut milestone = 1000;
[INFO] [stderr] 198 | |         for a in 0..5 {
[INFO] [stderr] ...   |
[INFO] [stderr] 231 | |         println!("Finished: {}", counter);
[INFO] [stderr] 232 | |     }).join();
[INFO] [stderr]     | |______________^
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(unused_must_use)] on by default
[INFO] [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] 
[INFO] [stderr] warning: field is never used: `spigots`
[INFO] [stderr]   --> src/main.rs:27:5
[INFO] [stderr]    |
[INFO] [stderr] 27 |     spigots: Option<usize>,
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(dead_code)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]    --> src/main.rs:195:5
[INFO] [stderr]     |
[INFO] [stderr] 195 | /     thread::spawn(move || {
[INFO] [stderr] 196 | |         let mut counter = 0;
[INFO] [stderr] 197 | |         let mut milestone = 1000;
[INFO] [stderr] 198 | |         for a in 0..5 {
[INFO] [stderr] ...   |
[INFO] [stderr] 231 | |         println!("Finished: {}", counter);
[INFO] [stderr] 232 | |     }).join();
[INFO] [stderr]     | |______________^
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(unused_must_use)] on by default
[INFO] [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 9.17s
[INFO] running `"docker" "inspect" "2aa095c976fda7defab638adaffaaa290c284a6cea0a9cb2198677e9cb5f8570"`
[INFO] running `"docker" "rm" "-f" "2aa095c976fda7defab638adaffaaa290c284a6cea0a9cb2198677e9cb5f8570"`
[INFO] [stdout] 2aa095c976fda7defab638adaffaaa290c284a6cea0a9cb2198677e9cb5f8570