[INFO] updating cached repository https://github.com/PhilipDaniels/projecteuler
[INFO] running `"git" "-c" "credential.helper=" "-c" "credential.helper=/big/crater/work/cargo-home/bin/git-credential-null" "-c" "remote.origin.fetch=refs/heads/*:refs/heads/*" "fetch" "origin" "--force" "--prune"`
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 32960482901579f6c3af5ba18865db39eb6c62b9
[INFO] testing PhilipDaniels/projecteuler against 1.38.0 for beta-1.39-1
[INFO] running `"git" "clone" "work/cache/git-repos/https%3A%2F%2Fgithub.com%2FPhilipDaniels%2Fprojecteuler" "work/builds/worker-8/source"`
[INFO] [stderr] Cloning into 'work/builds/worker-8/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/PhilipDaniels/projecteuler on toolchain 1.38.0
[INFO] running `"/big/crater/work/cargo-home/bin/cargo" "+1.38.0" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking git repo https://github.com/PhilipDaniels/projecteuler
[INFO] finished tweaking git repo https://github.com/PhilipDaniels/projecteuler
[INFO] tweaked toml for git repo https://github.com/PhilipDaniels/projecteuler written to work/builds/worker-8/source/Cargo.toml
[INFO] crate git repo https://github.com/PhilipDaniels/projecteuler already has a lockfile, it will not be regenerated
[INFO] running `"/big/crater/work/cargo-home/bin/cargo" "+1.38.0" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `"docker" "create" "-v" "/big/crater/work/builds/worker-8/target:/opt/rustwide/target:rw,Z" "-v" "/big/crater/work/builds/worker-8/source:/opt/rustwide/workdir:ro,Z" "-v" "/big/crater/work/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/big/crater/work/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "MAP_USER_ID=1000" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-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" "+1.38.0" "build" "--frozen"`
[INFO] [stdout] c3ca25043be1e08bad99f959a41fe47f2672addc096493b3acc94a5b55aec8b4
[INFO] running `"docker" "start" "-a" "c3ca25043be1e08bad99f959a41fe47f2672addc096493b3acc94a5b55aec8b4"`
[INFO] [stderr]    Compiling projecteuler v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/calc.rs:76:13
[INFO] [stderr]    |
[INFO] [stderr] 76 |         let mut x = n;
[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/calc.rs:77:13
[INFO] [stderr]    |
[INFO] [stderr] 77 |         let mut exponent = 1;
[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/p011_to_p020.rs:379:13
[INFO] [stderr]     |
[INFO] [stderr] 379 |         let mut d = column_sum;
[INFO] [stderr]     |             ----^
[INFO] [stderr]     |             |
[INFO] [stderr]     |             help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.17s
[INFO] running `"docker" "inspect" "c3ca25043be1e08bad99f959a41fe47f2672addc096493b3acc94a5b55aec8b4"`
[INFO] running `"docker" "rm" "-f" "c3ca25043be1e08bad99f959a41fe47f2672addc096493b3acc94a5b55aec8b4"`
[INFO] [stdout] c3ca25043be1e08bad99f959a41fe47f2672addc096493b3acc94a5b55aec8b4
[INFO] running `"docker" "create" "-v" "/big/crater/work/builds/worker-8/target:/opt/rustwide/target:rw,Z" "-v" "/big/crater/work/builds/worker-8/source:/opt/rustwide/workdir:ro,Z" "-v" "/big/crater/work/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/big/crater/work/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "MAP_USER_ID=1000" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-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" "+1.38.0" "test" "--frozen" "--no-run"`
[INFO] [stdout] 996470891f0a068814d2a4f164e788968f448b138a80e3b0e35f794653f87e6e
[INFO] running `"docker" "start" "-a" "996470891f0a068814d2a4f164e788968f448b138a80e3b0e35f794653f87e6e"`
[INFO] [stderr]    Compiling projecteuler v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/calc.rs:76:13
[INFO] [stderr]    |
[INFO] [stderr] 76 |         let mut x = n;
[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/calc.rs:77:13
[INFO] [stderr]    |
[INFO] [stderr] 77 |         let mut exponent = 1;
[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/p011_to_p020.rs:379:13
[INFO] [stderr]     |
[INFO] [stderr] 379 |         let mut d = column_sum;
[INFO] [stderr]     |             ----^
[INFO] [stderr]     |             |
[INFO] [stderr]     |             help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 2.33s
[INFO] running `"docker" "inspect" "996470891f0a068814d2a4f164e788968f448b138a80e3b0e35f794653f87e6e"`
[INFO] running `"docker" "rm" "-f" "996470891f0a068814d2a4f164e788968f448b138a80e3b0e35f794653f87e6e"`
[INFO] [stdout] 996470891f0a068814d2a4f164e788968f448b138a80e3b0e35f794653f87e6e
[INFO] running `"docker" "create" "-v" "/big/crater/work/builds/worker-8/target:/opt/rustwide/target:rw,Z" "-v" "/big/crater/work/builds/worker-8/source:/opt/rustwide/workdir:ro,Z" "-v" "/big/crater/work/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/big/crater/work/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "MAP_USER_ID=1000" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-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" "+1.38.0" "test" "--frozen"`
[INFO] [stdout] b3cad73b8adc539182dfb39f333955509c42b78a896594736b7dfaf439aecb9d
[INFO] running `"docker" "start" "-a" "b3cad73b8adc539182dfb39f333955509c42b78a896594736b7dfaf439aecb9d"`
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.03s
[INFO] [stderr]      Running /opt/rustwide/target/debug/deps/projecteuler-568e6c5e9a34ab7f
[INFO] [stdout] 
[INFO] [stdout] running 23 tests
[INFO] [stdout] test calc::tests::gcd_works ... ok
[INFO] [stdout] test calc::tests::divisors_works ... ok
[INFO] [stdout] test calc::tests::sqrt_ceil_works ... ok
[INFO] [stdout] test calc::tests::sqrt_upper_bound_works ... ok
[INFO] [stdout] test calc::tests::triangle_works ... ok
[INFO] [stdout] test calc::tests::vec_to_num_works ... ok
[INFO] [stdout] test fibonacci::tests::fib_in_range_for_start_at_zero_returns_first_fibs ... ok
[INFO] [stdout] test fibonacci::tests::fib_in_range_for_start_at_nonzero_returns_correct_fibs ... ok
[INFO] [stdout] test matrix::tests::from_str_for_empty_string_returns_empty_matrix ... ok
[INFO] [stdout] test fibonacci::tests::fib_in_range_for_empty_range_returns_empty_vec ... ok
[INFO] [stdout] test iterator_adapters::tests::in_range_works ... ok
[INFO] [stdout] test calc::tests::collatz_len_works ... ok
[INFO] [stdout] test matrix::tests::from_str_for_string_containing_non_numbers_returns_err ... ok
[INFO] [stdout] test matrix::tests::from_str_for_one_dimensional_string_returns_correct_vector ... ok
[INFO] [stdout] test matrix::tests::from_str_for_string_containing_different_numbers_of_cols_returns_err ... ok
[INFO] [stdout] test matrix::tests::from_str_for_two_dimensional_string_returns_correct_vector ... ok
[INFO] [stdout] test prime::tests::primes_in_range_for_start_at_nonzero_returns_correct_primes ... ok
[INFO] [stdout] test prime::tests::primes_in_range_for_empty_range_returns_empty_vec ... ok
[INFO] [stdout] test utils::tests::is_palindrome_vec_for_empty_slice_returns_true ... ok
[INFO] [stdout] test utils::tests::is_palindrome_vec_for_slices_which_are_not_palindromes_returns_false ... ok
[INFO] [stdout] test prime::tests::primes_in_range_for_start_at_zero_returns_first_primes ... ok
[INFO] [stdout] test utils::tests::is_palindrome_for_singleton_slice_returns_true ... ok
[INFO] [stdout] test utils::tests::is_palindrome_for_slices_which_are_palindromes_returns_true ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 23 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] running `"docker" "inspect" "b3cad73b8adc539182dfb39f333955509c42b78a896594736b7dfaf439aecb9d"`
[INFO] running `"docker" "rm" "-f" "b3cad73b8adc539182dfb39f333955509c42b78a896594736b7dfaf439aecb9d"`
[INFO] [stdout] b3cad73b8adc539182dfb39f333955509c42b78a896594736b7dfaf439aecb9d