[INFO] cloning repository https://github.com/DarrenRJ/Euler
[INFO] running `"git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/DarrenRJ/Euler" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FDarrenRJ%2FEuler"`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FDarrenRJ%2FEuler'...
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 2669d3f7afa22fcb93de70fcc0a8d4fb10a4f483
[INFO] checking DarrenRJ/Euler against try#ea663bba38739867a4b75ac820991b4f5d093c3b for pr-62262-1
[INFO] running `"git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FDarrenRJ%2FEuler" "/workspace/builds/worker-10/source"`
[INFO] [stderr] Cloning into '/workspace/builds/worker-10/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/DarrenRJ/Euler on toolchain ea663bba38739867a4b75ac820991b4f5d093c3b
[INFO] running `"/workspace/cargo-home/bin/cargo" "+ea663bba38739867a4b75ac820991b4f5d093c3b" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking git repo https://github.com/DarrenRJ/Euler
[INFO] finished tweaking git repo https://github.com/DarrenRJ/Euler
[INFO] tweaked toml for git repo https://github.com/DarrenRJ/Euler written to /workspace/builds/worker-10/source/Cargo.toml
[INFO] crate git repo https://github.com/DarrenRJ/Euler already has a lockfile, it will not be regenerated
[INFO] running `"/workspace/cargo-home/bin/cargo" "+ea663bba38739867a4b75ac820991b4f5d093c3b" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-10/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-10/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "MAP_USER_ID=0" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--network" "none" "rustops/crates-build-env" "/opt/rustwide/cargo-home/bin/cargo" "+ea663bba38739867a4b75ac820991b4f5d093c3b" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 9d8a04f6da5b90f9f2a2b881179d5236f0d5cc1c9d446af1f887044526089a1a
[INFO] running `"docker" "start" "-a" "9d8a04f6da5b90f9f2a2b881179d5236f0d5cc1c9d446af1f887044526089a1a"`
[INFO] [stderr]     Checking num-bigint v0.1.40
[INFO] [stderr]     Checking num-complex 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/rustwide/workdir)
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]     --> src/solutions.rs:2117:25
[INFO] [stderr]      |
[INFO] [stderr] 2117 |                     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:2354:13
[INFO] [stderr]      |
[INFO] [stderr] 2354 |         let mut a = 100-i;
[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/solutions.rs:2357:17
[INFO] [stderr]      |
[INFO] [stderr] 2357 |             let mut b = 100-j;
[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/solutions.rs:2117:25
[INFO] [stderr]      |
[INFO] [stderr] 2117 |                     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:2354:13
[INFO] [stderr]      |
[INFO] [stderr] 2354 |         let mut a = 100-i;
[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/solutions.rs:2357:17
[INFO] [stderr]      |
[INFO] [stderr] 2357 |             let mut b = 100-j;
[INFO] [stderr]      |                 ----^
[INFO] [stderr]      |                 |
[INFO] [stderr]      |                 help: remove this `mut`
[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 9.75s
[INFO] running `"docker" "inspect" "9d8a04f6da5b90f9f2a2b881179d5236f0d5cc1c9d446af1f887044526089a1a"`
[INFO] running `"docker" "rm" "-f" "9d8a04f6da5b90f9f2a2b881179d5236f0d5cc1c9d446af1f887044526089a1a"`
[INFO] [stdout] 9d8a04f6da5b90f9f2a2b881179d5236f0d5cc1c9d446af1f887044526089a1a