[INFO] updating cached repository PlasmaPower/kmer-counter
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/PlasmaPower/kmer-counter
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/PlasmaPower/kmer-counter" "work/ex/pr-58948/sources/master#0f88167f89fffe321590c5148f21b7d51d44388d/gh/PlasmaPower/kmer-counter"`
[INFO] [stderr] Cloning into 'work/ex/pr-58948/sources/master#0f88167f89fffe321590c5148f21b7d51d44388d/gh/PlasmaPower/kmer-counter'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/PlasmaPower/kmer-counter" "work/ex/pr-58948/sources/try#a829e31f924ec11e400e8d0c2fd2c4bb8937ae6b/gh/PlasmaPower/kmer-counter"`
[INFO] [stderr] Cloning into 'work/ex/pr-58948/sources/try#a829e31f924ec11e400e8d0c2fd2c4bb8937ae6b/gh/PlasmaPower/kmer-counter'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 2c45214e26574202f848066e0a991ef5274443d0
[INFO] sha for GitHub repo PlasmaPower/kmer-counter: 2c45214e26574202f848066e0a991ef5274443d0
[INFO] validating manifest of PlasmaPower/kmer-counter on toolchain master#0f88167f89fffe321590c5148f21b7d51d44388d
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+0f88167f89fffe321590c5148f21b7d51d44388d-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of PlasmaPower/kmer-counter on toolchain try#a829e31f924ec11e400e8d0c2fd2c4bb8937ae6b
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+a829e31f924ec11e400e8d0c2fd2c4bb8937ae6b-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing PlasmaPower/kmer-counter
[INFO] finished frobbing PlasmaPower/kmer-counter
[INFO] frobbed toml for PlasmaPower/kmer-counter written to work/ex/pr-58948/sources/master#0f88167f89fffe321590c5148f21b7d51d44388d/gh/PlasmaPower/kmer-counter/Cargo.toml
[INFO] started frobbing PlasmaPower/kmer-counter
[INFO] finished frobbing PlasmaPower/kmer-counter
[INFO] frobbed toml for PlasmaPower/kmer-counter written to work/ex/pr-58948/sources/try#a829e31f924ec11e400e8d0c2fd2c4bb8937ae6b/gh/PlasmaPower/kmer-counter/Cargo.toml
[INFO] crate PlasmaPower/kmer-counter already has a lockfile, it will not be regenerated
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+0f88167f89fffe321590c5148f21b7d51d44388d-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+a829e31f924ec11e400e8d0c2fd2c4bb8937ae6b-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] checking PlasmaPower/kmer-counter against try#a829e31f924ec11e400e8d0c2fd2c4bb8937ae6b for pr-58948
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-58948/worker-4/try#a829e31f924ec11e400e8d0c2fd2c4bb8937ae6b:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-58948/sources/try#a829e31f924ec11e400e8d0c2fd2c4bb8937ae6b/gh/PlasmaPower/kmer-counter:/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" "+a829e31f924ec11e400e8d0c2fd2c4bb8937ae6b-alt" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stdout] d6671644efcfaad2ef72e6771845cf848f7d69ea6e3267075ac81d4265aa5f16
[INFO] running `"docker" "start" "-a" "d6671644efcfaad2ef72e6771845cf848f7d69ea6e3267075ac81d4265aa5f16"`
[INFO] [stderr]    Compiling backtrace-sys v0.1.5
[INFO] [stderr]     Checking memmap v0.5.0
[INFO] [stderr]     Checking jobsteal v0.5.1
[INFO] [stderr]     Checking backtrace v0.3.0
[INFO] [stderr]     Checking error-chain v0.7.1
[INFO] [stderr]     Checking kmer-counter v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/kmer_tree.rs:42:24
[INFO] [stderr]    |
[INFO] [stderr] 42 |         while let Some(mut count) = self.counts.get_mut(self.index) {
[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/kmer_tree.rs:42:24
[INFO] [stderr]    |
[INFO] [stderr] 42 |         while let Some(mut count) = self.counts.get_mut(self.index) {
[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 4.36s
[INFO] running `"docker" "inspect" "d6671644efcfaad2ef72e6771845cf848f7d69ea6e3267075ac81d4265aa5f16"`
[INFO] running `"docker" "rm" "-f" "d6671644efcfaad2ef72e6771845cf848f7d69ea6e3267075ac81d4265aa5f16"`
[INFO] [stdout] d6671644efcfaad2ef72e6771845cf848f7d69ea6e3267075ac81d4265aa5f16