[INFO] updating cached repository DarrenRJ/Euler
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/DarrenRJ/Euler
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/DarrenRJ/Euler" "work/ex/pr-61100/sources/master#8869ee03d7f258e1b76a11c6fbb01b5708a9f504/gh/DarrenRJ/Euler"`
[INFO] [stderr] Cloning into 'work/ex/pr-61100/sources/master#8869ee03d7f258e1b76a11c6fbb01b5708a9f504/gh/DarrenRJ/Euler'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/DarrenRJ/Euler" "work/ex/pr-61100/sources/try#58b21121d0b447ceb3f1a655155d802191acf044/gh/DarrenRJ/Euler"`
[INFO] [stderr] Cloning into 'work/ex/pr-61100/sources/try#58b21121d0b447ceb3f1a655155d802191acf044/gh/DarrenRJ/Euler'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] a80c0e755c91b5253a257a11ee8cddb73418cffa
[INFO] sha for GitHub repo DarrenRJ/Euler: a80c0e755c91b5253a257a11ee8cddb73418cffa
[INFO] validating manifest of DarrenRJ/Euler on toolchain master#8869ee03d7f258e1b76a11c6fbb01b5708a9f504
[INFO] running `"/mnt/crater-raid/crater/work/local/cargo-home/bin/cargo" "+8869ee03d7f258e1b76a11c6fbb01b5708a9f504-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of DarrenRJ/Euler on toolchain try#58b21121d0b447ceb3f1a655155d802191acf044
[INFO] running `"/mnt/crater-raid/crater/work/local/cargo-home/bin/cargo" "+58b21121d0b447ceb3f1a655155d802191acf044-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing DarrenRJ/Euler
[INFO] finished frobbing DarrenRJ/Euler
[INFO] frobbed toml for DarrenRJ/Euler written to work/ex/pr-61100/sources/master#8869ee03d7f258e1b76a11c6fbb01b5708a9f504/gh/DarrenRJ/Euler/Cargo.toml
[INFO] started frobbing DarrenRJ/Euler
[INFO] finished frobbing DarrenRJ/Euler
[INFO] frobbed toml for DarrenRJ/Euler written to work/ex/pr-61100/sources/try#58b21121d0b447ceb3f1a655155d802191acf044/gh/DarrenRJ/Euler/Cargo.toml
[INFO] crate DarrenRJ/Euler already has a lockfile, it will not be regenerated
[INFO] running `"/mnt/crater-raid/crater/work/local/cargo-home/bin/cargo" "+8869ee03d7f258e1b76a11c6fbb01b5708a9f504-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/crater-raid/crater/work/local/cargo-home/bin/cargo" "+58b21121d0b447ceb3f1a655155d802191acf044-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] checking DarrenRJ/Euler against try#58b21121d0b447ceb3f1a655155d802191acf044 for pr-61100
[INFO] running `"docker" "create" "-v" "/mnt/crater-raid/crater/work/local/target-dirs/pr-61100/worker-4/try#58b21121d0b447ceb3f1a655155d802191acf044:/opt/crater/target:rw,Z" "-v" "/mnt/crater-raid/crater/work/ex/pr-61100/sources/try#58b21121d0b447ceb3f1a655155d802191acf044/gh/DarrenRJ/Euler:/opt/crater/workdir:ro,Z" "-v" "/mnt/crater-raid/crater/work/local/cargo-home:/opt/crater/cargo-home:ro,Z" "-v" "/mnt/crater-raid/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" "+58b21121d0b447ceb3f1a655155d802191acf044-alt" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stdout] 60881eb2b190c2689fed5f63fba6034823977a3f834251416544a30a232cc36b
[INFO] running `"docker" "start" "-a" "60881eb2b190c2689fed5f63fba6034823977a3f834251416544a30a232cc36b"`
[INFO] [stderr]     Checking num-bigint v0.1.40
[INFO] [stderr]     Checking primal-sieve v0.2.7
[INFO] [stderr]     Checking num-rational v0.1.39
[INFO] [stderr]     Checking num v0.1.40
[INFO] [stderr]     Checking primal-check v0.2.2
[INFO] [stderr]     Checking primal v0.2.3
[INFO] [stderr]     Checking euler v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]     --> src/solutions.rs:2115:25
[INFO] [stderr]      |
[INFO] [stderr] 2115 |                     let mut candidate : usize = generate_candidate( i, last_digit[k], pattern, replacment );
[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/solutions.rs:2115:25
[INFO] [stderr]      |
[INFO] [stderr] 2115 |                     let mut candidate : usize = generate_candidate( i, last_digit[k], pattern, replacment );
[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: function is never used: `test_factors`
[INFO] [stderr]    --> src/factors.rs:205:5
[INFO] [stderr]     |
[INFO] [stderr] 205 |     fn test_factors()
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(dead_code)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `test_divisor_count`
[INFO] [stderr]    --> src/factors.rs:215:5
[INFO] [stderr]     |
[INFO] [stderr] 215 |     fn test_divisor_count()
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `test_proper_divisors`
[INFO] [stderr]    --> src/factors.rs:226:5
[INFO] [stderr]     |
[INFO] [stderr] 226 |     fn test_proper_divisors()
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `test_sum_of_proper_divisors`
[INFO] [stderr]    --> src/factors.rs:238:5
[INFO] [stderr]     |
[INFO] [stderr] 238 |     fn test_sum_of_proper_divisors()
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 5.92s
[INFO] running `"docker" "inspect" "60881eb2b190c2689fed5f63fba6034823977a3f834251416544a30a232cc36b"`
[INFO] running `"docker" "rm" "-f" "60881eb2b190c2689fed5f63fba6034823977a3f834251416544a30a232cc36b"`
[INFO] [stdout] 60881eb2b190c2689fed5f63fba6034823977a3f834251416544a30a232cc36b