Nov 28 13:09:59.844 INFO checking Hoverbear/rust-rosetta against master#0b9f19dff1347e29bf4362ab5a8fab84b43023b5 for pr-56074
Nov 28 13:09:59.846 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-56074/worker-6/master#0b9f19dff1347e29bf4362ab5a8fab84b43023b5:/target:rw,Z" "-v" "/mnt/big/crater/work/local/test-source/worker-6/pr-56074/master#0b9f19dff1347e29bf4362ab5a8fab84b43023b5:/source:ro,Z" "-v" "/mnt/big/crater/work/local/cargo-home:/cargo-home:ro,Z" "-v" "/mnt/big/crater/work/local/rustup-home:/rustup-home:ro,Z" "-e" "USER_ID=1000" "-e" "SOURCE_DIR=/source" "-e" "USER_ID=1000" "-e" "CMD=cargo +0b9f19dff1347e29bf4362ab5a8fab84b43023b5-alt check --frozen --all --all-targets" "-e" "CARGO_TARGET_DIR=/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/cargo-home" "-e" "RUSTUP_HOME=/rustup-home" "-m" "1536M" "--network" "none" "crater"`
Nov 28 13:10:00.283 INFO [stdout] a25e7063a8d1719389d23c6a5faae53277b3144f14dc3a3b8b6a1affc64d66b7
Nov 28 13:10:00.283 INFO running `"docker" "start" "-a" "a25e7063a8d1719389d23c6a5faae53277b3144f14dc3a3b8b6a1affc64d66b7"`
Nov 28 13:10:01.924 INFO [stderr] usermod: no changes
Nov 28 13:10:04.076 INFO [stderr]     Checking rand_core v0.2.1
Nov 28 13:10:04.084 INFO [stderr]    Compiling regex v1.0.2
Nov 28 13:10:04.095 INFO [stderr]     Checking run-length-encoding v0.1.0 (/source/tasks/run-length-encoding)
Nov 28 13:10:04.095 INFO [stderr]     Checking bitmap v0.1.0 (/source/tasks/bitmap)
Nov 28 13:10:04.095 INFO [stderr]     Checking prime-decomposition v0.1.0 (/source/tasks/prime-decomposition)
Nov 28 13:10:04.095 INFO [stderr]     Checking aks-test-for-primes v0.1.0 (/source/tasks/aks-test-for-primes)
Nov 28 13:10:04.095 INFO [stderr]     Checking permutohedron v0.2.4
Nov 28 13:10:04.095 INFO [stderr]     Checking entropy v0.1.0 (/source/tasks/entropy)
Nov 28 13:10:04.932 INFO [stderr]     Checking sha-1 v0.1.0 (/source/tasks/sha-1)
Nov 28 13:10:05.004 INFO [stderr]     Checking vigenere-cipher v0.1.0 (/source/tasks/vigenere-cipher)
Nov 28 13:10:06.788 INFO [stderr]     Checking empty-directory v0.1.0 (/source/tasks/empty-directory)
Nov 28 13:10:06.788 INFO [stderr]     Checking construct-from-rational-number v0.1.0 (/source/tasks/continued-fraction/arithmetic/construct-from-rational-number)
Nov 28 13:10:06.788 INFO [stderr]     Checking fizzbuzz v0.1.0 (/source/tasks/fizzbuzz)
Nov 28 13:10:07.297 INFO [stderr]     Checking array-length v0.1.0 (/source/tasks/array-length)
Nov 28 13:10:07.414 INFO [stderr]     Checking combinations-with-repetitions v0.1.0 (/source/tasks/combinations-with-repetitions)
Nov 28 13:10:07.481 INFO [stderr]     Checking self-describing_numbers v0.1.0 (/source/tasks/self-describing-numbers)
Nov 28 13:10:08.329 INFO [stderr]     Checking string-case v0.1.0 (/source/tasks/string-case)
Nov 28 13:10:08.648 INFO [stderr]     Checking i-before-e-except-after-c v0.1.0 (/source/tasks/i-before-e-except-after-c)
Nov 28 13:10:09.752 INFO [stderr]     Checking enforced-immutability v0.1.0 (/source/tasks/enforced-immutability)
Nov 28 13:10:09.898 INFO [stderr]     Checking multiplication-tables v0.1.0 (/source/tasks/multiplication-tables)
Nov 28 13:10:10.312 INFO [stderr]     Checking standard-error v0.1.0 (/source/tasks/hello-world/standard-error)
Nov 28 13:10:10.316 INFO [stderr]     Checking jortsort v0.1.0 (/source/tasks/jortsort)
Nov 28 13:10:10.552 INFO [stderr]     Checking ethiopian-multiplication v0.1.0 (/source/tasks/ethiopian-multiplication)
Nov 28 13:10:10.653 INFO [stderr]     Checking case-sensitivity-of-identifiers v0.1.0 (/source/tasks/case-sensitivity-of-identifiers)
Nov 28 13:10:10.992 INFO [stderr]     Checking greatest-element-of-a-list v0.1.0 (/source/tasks/greatest-element-of-a-list)
Nov 28 13:10:11.656 INFO [stderr]     Checking sum-digits-of-an-integer v0.1.0 (/source/tasks/sum-digits-of-an-integer)
Nov 28 13:10:11.769 INFO [stderr]     Checking encode v0.1.0 (/source/tasks/roman-numerals/encode)
Nov 28 13:10:11.976 INFO [stderr]     Checking with-feedback-player v0.1.0 (/source/tasks/guess-the-number/with-feedback-player)
Nov 28 13:10:12.276 INFO [stderr]     Checking parametric-polymorphism v0.1.0 (/source/tasks/parametric-polymorphism)
Nov 28 13:10:12.288 INFO [stderr]     Checking jaro-distance v0.1.0 (/source/tasks/jaro-distance)
Nov 28 13:10:12.652 INFO [stderr]     Checking copy-a-string v0.1.0 (/source/tasks/copy-a-string)
Nov 28 13:10:12.895 INFO [stderr]     Checking standard-deviation v0.1.0 (/source/tasks/standard-deviation)
Nov 28 13:10:13.225 INFO [stderr]     Checking obtain-a-y-or-n-response v0.1.0 (/source/tasks/keyboard-input/obtain-a-y-or-n-response)
Nov 28 13:10:13.280 INFO [stderr]     Checking perfect-numbers v0.1.0 (/source/tasks/perfect-numbers)
Nov 28 13:10:13.280 INFO [stderr]     Checking file-size v0.1.0 (/source/tasks/file-size)
Nov 28 13:10:13.488 INFO [stderr]     Checking sierpinski-triangle v0.1.0 (/source/tasks/sierpinski-triangle)
Nov 28 13:10:13.536 INFO [stderr]     Checking sum-and-product-of-an-array v0.1.0 (/source/tasks/sum-and-product-of-an-array)
Nov 28 13:10:13.764 INFO [stderr]     Checking define-a-primitive-data-type v0.1.0 (/source/tasks/define-a-primitive-data-type)
Nov 28 13:10:13.852 INFO [stderr]     Checking hofstadter-q-sequence v0.1.0 (/source/tasks/hofstadter-q-sequence)
Nov 28 13:10:14.244 INFO [stderr]     Checking y-combinator v0.1.0 (/source/tasks/y-combinator)
Nov 28 13:10:14.745 INFO [stderr]     Checking foreach v0.1.0 (/source/tasks/loops/foreach)
Nov 28 13:10:14.784 INFO [stderr]     Checking sum-of-squares v0.1.0 (/source/tasks/sum-of-squares)
Nov 28 13:10:15.051 INFO [stderr]     Checking pythagorean-triples v0.1.0 (/source/tasks/pythagorean-triples)
Nov 28 13:10:15.422 INFO [stderr]     Checking apply-a-callback-to-an-array v0.1.0 (/source/tasks/apply-a-callback-to-an-array)
Nov 28 13:10:15.500 INFO [stderr]     Checking binary-digits v0.1.0 (/source/tasks/binary-digits)
Nov 28 13:10:15.567 INFO [stderr] warning: the feature `iterator_step_by` has been stable since 1.28.0 and no longer requires an attribute to enable
Nov 28 13:10:15.567 INFO [stderr]  --> tasks/sierpinski-triangle/src/main.rs:1:12
Nov 28 13:10:15.567 INFO [stderr]   |
Nov 28 13:10:15.567 INFO [stderr] 1 | #![feature(iterator_step_by)]
Nov 28 13:10:15.567 INFO [stderr]   |            ^^^^^^^^^^^^^^^^
Nov 28 13:10:15.567 INFO [stderr]   |
Nov 28 13:10:15.567 INFO [stderr]   = note: #[warn(stable_features)] on by default
Nov 28 13:10:15.567 INFO [stderr] 
Nov 28 13:10:15.620 INFO [stderr]     Checking infinite v0.1.0 (/source/tasks/loops/infinite)
Nov 28 13:10:17.224 INFO [stderr]     Checking lzw-compression v0.1.0 (/source/tasks/lzw-compression)
Nov 28 13:10:17.256 INFO [stderr]     Checking loop-over-multiple-arrays-simultaneously v0.1.0 (/source/tasks/loop-over-multiple-arrays-simultaneously)
Nov 28 13:10:17.396 INFO [stderr]     Checking arrays v0.1.0 (/source/tasks/arrays)
Nov 28 13:10:17.512 INFO [stderr]     Checking associative-array-iteration v0.1.0 (/source/tasks/associative-array/iteration)
Nov 28 13:10:17.988 INFO [stderr]     Checking checkpoint-synchronization v0.1.0 (/source/tasks/checkpoint-synchronization)
Nov 28 13:10:18.027 INFO [stderr]     Checking iterated-digits-squaring v0.1.0 (/source/tasks/iterated-digits-squaring)
Nov 28 13:10:18.096 INFO [stderr]     Checking increment-a-numerical-string v0.1.0 (/source/tasks/increment-a-numerical-string)
Nov 28 13:10:18.100 INFO [stderr]     Checking string-matching v0.1.0 (/source/tasks/string-matching)
Nov 28 13:10:18.796 INFO [stderr]     Checking bubble-sort v0.1.0 (/source/tasks/sorting-algorithms/bubble-sort)
Nov 28 13:10:19.446 INFO [stderr]     Checking fasta-format v0.1.0 (/source/tasks/fasta-format)
Nov 28 13:10:19.724 INFO [stderr]     Checking window-creation v0.1.0 (/source/tasks/window-creation)
Nov 28 13:10:19.768 INFO [stderr]     Checking dining-philosophers v0.1.0 (/source/tasks/dining-philosophers)
Nov 28 13:10:19.816 INFO [stderr]     Checking price-fraction v0.1.0 (/source/tasks/price-fraction)
Nov 28 13:10:19.863 INFO [stderr]     Checking permutations-with-repetitions v0.1.0 (/source/tasks/permutations-with-repetitions)
Nov 28 13:10:19.955 INFO [stderr]     Checking newbie v0.1.0 (/source/tasks/hello-world/newbie)
Nov 28 13:10:20.156 INFO [stderr]     Checking determine-if-only-one-instance-is-running v0.1.0 (/source/tasks/determine-if-only-one-instance-is-running)
Nov 28 13:10:20.932 INFO [stderr]     Checking median v0.1.0 (/source/tasks/averages/median)
Nov 28 13:10:20.932 INFO [stderr]     Checking integer-comparison v0.1.0 (/source/tasks/integer-comparison)
Nov 28 13:10:20.969 INFO [stderr]     Checking knights-tour v0.1.0 (/source/tasks/knights-tour)
Nov 28 13:10:21.352 INFO [stderr]     Checking population-count v0.1.0 (/source/tasks/population-count)
Nov 28 13:10:21.972 INFO [stderr]     Checking unicode-variable-names v0.1.0 (/source/tasks/unicode-variable-names)
Nov 28 13:10:22.512 INFO [stderr]     Checking letter-frequency v0.1.0 (/source/tasks/letter-frequency)
Nov 28 13:10:22.868 INFO [stderr]     Checking count-occurrences-of-a-substring v0.1.0 (/source/tasks/count-occurrences-of-a-substring)
Nov 28 13:10:23.568 INFO [stderr]     Checking empty-program v0.1.0 (/source/tasks/empty-program)
Nov 28 13:10:23.931 INFO [stderr]     Checking line-printer v0.1.0 (/source/tasks/hello-world/line-printer)
Nov 28 13:10:24.377 INFO [stderr]     Checking stack v0.1.0 (/source/tasks/stack)
Nov 28 13:10:24.524 INFO [stderr]     Checking mutual-recursion v0.1.0 (/source/tasks/mutual-recursion)
Nov 28 13:10:24.584 INFO [stderr]     Checking arithmetic-mean v0.1.0 (/source/tasks/averages/arithmetic-mean)
Nov 28 13:10:24.644 INFO [stderr]     Checking animation v0.1.0 (/source/tasks/animation)
Nov 28 13:10:25.878 INFO [stderr]     Checking floyd-warshall-algorithm v0.1.0 (/source/tasks/floyd-warshall-algorithm)
Nov 28 13:10:25.904 INFO [stderr]     Checking catalan-numbers v0.1.0 (/source/tasks/catalan-numbers)
Nov 28 13:10:25.996 INFO [stderr]     Checking gray-code v0.1.0 (/source/tasks/gray-code)
Nov 28 13:10:26.393 INFO [stderr]     Checking null-object v0.1.0 (/source/tasks/null-object)
Nov 28 13:10:26.796 INFO [stderr]     Checking n-queens-problem v0.1.0 (/source/tasks/n-queens-problem)
Nov 28 13:10:26.892 INFO [stderr]     Checking word-wrap v0.1.0 (/source/tasks/word-wrap)
Nov 28 13:10:26.925 INFO [stderr]     Checking comments v0.1.0 (/source/tasks/comments)
Nov 28 13:10:27.089 INFO [stderr]     Checking newline-omission v0.1.0 (/source/tasks/hello-world/newline-omission)
Nov 28 13:10:27.266 INFO [stderr]     Checking hailstone-sequence v0.1.0 (/source/tasks/hailstone-sequence)
Nov 28 13:10:27.912 INFO [stderr]     Checking four-bit-adder v0.1.0 (/source/tasks/four-bit-adder)
Nov 28 13:10:28.679 INFO [stderr]     Checking general-fizzbuzz v0.1.0 (/source/tasks/general-fizzbuzz)
Nov 28 13:10:28.702 INFO [stderr]     Checking harshad-or-niven-series v0.1.0 (/source/tasks/harshad-or-niven-series)
Nov 28 13:10:29.160 INFO [stderr]     Checking character-codes v0.1.0 (/source/tasks/character-codes)
Nov 28 13:10:29.182 INFO [stderr]     Checking execute-brainfuck v0.1.0 (/source/tasks/execute-brainfuck)
Nov 28 13:10:29.664 INFO [stderr]     Checking higher-order-functions v0.1.0 (/source/tasks/higher-order-functions)
Nov 28 13:10:30.221 INFO [stderr]     Checking heapsort v0.1.0 (/source/tasks/sorting-algorithms/heapsort)
Nov 28 13:10:30.287 INFO [stderr]     Checking n-plus-one-half v0.1.0 (/source/tasks/loops/n-plus-one-half)
Nov 28 13:10:30.544 INFO [stderr]     Checking ulam-spiral-for-primes v0.1.0 (/source/tasks/ulam-spiral-for-primes)
Nov 28 13:10:30.808 INFO [stderr]     Checking ordered-words v0.1.0 (/source/tasks/ordered-words)
Nov 28 13:10:30.922 INFO [stderr]     Checking power-set v0.1.0 (/source/tasks/power-set)
Nov 28 13:10:31.041 INFO [stderr]     Checking traversal v0.1.0 (/source/tasks/singly-linked-list/traversal)
Nov 28 13:10:31.352 INFO [stderr]     Checking mode v0.1.0 (/source/tasks/averages/mode)
Nov 28 13:10:32.367 INFO [stderr]     Checking decode v0.1.0 (/source/tasks/roman-numerals/decode)
Nov 28 13:10:33.480 INFO [stderr] warning: the feature `iterator_step_by` has been stable since 1.28.0 and no longer requires an attribute to enable
Nov 28 13:10:33.480 INFO [stderr]  --> tasks/ulam-spiral-for-primes/src/main.rs:1:12
Nov 28 13:10:33.480 INFO [stderr]   |
Nov 28 13:10:33.480 INFO [stderr] 1 | #![feature(iterator_step_by)]
Nov 28 13:10:33.480 INFO [stderr]   |            ^^^^^^^^^^^^^^^^
Nov 28 13:10:33.480 INFO [stderr]   |
Nov 28 13:10:33.480 INFO [stderr]   = note: #[warn(stable_features)] on by default
Nov 28 13:10:33.480 INFO [stderr] 
Nov 28 13:10:33.571 INFO [stderr]     Checking merge-sort v0.1.0 (/source/tasks/sorting-algorithms/merge-sort)
Nov 28 13:10:33.584 INFO [stderr]     Checking rot-13 v0.1.0 (/source/tasks/rot-13)
Nov 28 13:10:33.618 INFO [stderr]     Checking formatted-numeric-output v0.1.0 (/source/tasks/formatted-numeric-output)
Nov 28 13:10:33.769 INFO [stderr]     Checking input-loop v0.1.0 (/source/tasks/input-loop)
Nov 28 13:10:34.266 INFO [stderr]     Checking implementation v0.1.0 (/source/tasks/md5/implementation)
Nov 28 13:10:34.693 INFO [stderr]     Checking create-a-file v0.1.0 (/source/tasks/create-a-file)
Nov 28 13:10:35.564 INFO [stderr] warning: the feature `iterator_step_by` has been stable since 1.28.0 and no longer requires an attribute to enable
Nov 28 13:10:35.564 INFO [stderr]  --> tasks/sierpinski-triangle/src/main.rs:1:12
Nov 28 13:10:35.564 INFO [stderr]   |
Nov 28 13:10:35.564 INFO [stderr] 1 | #![feature(iterator_step_by)]
Nov 28 13:10:35.564 INFO [stderr]   |            ^^^^^^^^^^^^^^^^
Nov 28 13:10:35.569 INFO [stderr]   |
Nov 28 13:10:35.569 INFO [stderr]   = note: #[warn(stable_features)] on by default
Nov 28 13:10:35.569 INFO [stderr] 
Nov 28 13:10:35.819 INFO [stderr]     Checking 0-1 v0.1.0 (/source/tasks/knapsack-problem/0-1)
Nov 28 13:10:36.036 INFO [stderr] warning: the feature `iterator_step_by` has been stable since 1.28.0 and no longer requires an attribute to enable
Nov 28 13:10:36.036 INFO [stderr]  --> tasks/md5/implementation/src/main.rs:6:12
Nov 28 13:10:36.036 INFO [stderr]   |
Nov 28 13:10:36.036 INFO [stderr] 6 | #![feature(iterator_step_by)]
Nov 28 13:10:36.036 INFO [stderr]   |            ^^^^^^^^^^^^^^^^
Nov 28 13:10:36.036 INFO [stderr]   |
Nov 28 13:10:36.036 INFO [stderr]   = note: #[warn(stable_features)] on by default
Nov 28 13:10:36.036 INFO [stderr] 
Nov 28 13:10:36.104 INFO [stderr]     Checking check-that-file-exists v0.1.0 (/source/tasks/check-that-file-exists)
Nov 28 13:10:36.313 INFO [stderr]     Checking root-mean-square v0.1.0 (/source/tasks/averages/root-mean-square)
Nov 28 13:10:36.900 INFO [stderr]     Checking chinese-remainder-theorem v0.1.0 (/source/tasks/chinese-remainder-theorem)
Nov 28 13:10:37.500 INFO [stderr]     Checking generate-lower-case-ascii-alphabet v0.1.0 (/source/tasks/generate-lower-case-ascii-alphabet)
Nov 28 13:10:37.640 INFO [stderr]     Checking return-multiple-values v0.1.0 (/source/tasks/return-multiple-values)
Nov 28 13:10:38.496 INFO [stderr]     Checking array-concatenation v0.1.0 (/source/tasks/array-concatenation)
Nov 28 13:10:39.433 INFO [stderr]     Checking numerical-integration v0.1.0 (/source/tasks/numerical-integration)
Nov 28 13:10:39.644 INFO [stderr]     Checking metered-concurrency v0.1.0 (/source/tasks/metered-concurrency)
Nov 28 13:10:40.276 INFO [stderr]     Checking sequence-of-non-squares v0.1.0 (/source/tasks/sequence-of-non-squares)
Nov 28 13:10:41.433 INFO [stderr]     Checking tokenize-a-string v0.1.0 (/source/tasks/tokenize-a-string)
Nov 28 13:10:41.465 INFO [stderr]     Checking repeat-a-string v0.1.0 (/source/tasks/repeat-a-string)
Nov 28 13:10:42.850 INFO [stderr]     Checking sudoku v0.1.0 (/source/tasks/sudoku)
Nov 28 13:10:42.853 INFO [stderr]     Checking quine v0.1.0 (/source/tasks/quine)
Nov 28 13:10:42.889 INFO [stderr]     Checking assertions v0.1.0 (/source/tasks/assertions)
Nov 28 13:10:44.077 INFO [stderr]     Checking eulers-sum-of-powers-conjecture v0.1.0 (/source/tasks/eulers-sum-of-powers-conjecture)
Nov 28 13:10:44.161 INFO [stderr]     Checking read-a-file-line-by-line v0.1.0 (/source/tasks/read-a-file-line-by-line)
Nov 28 13:10:44.624 INFO [stderr]     Checking factors-of-an-integer v0.1.0 (/source/tasks/factors-of-an-integer)
Nov 28 13:10:44.632 INFO [stderr]     Checking generate-chess960-starting-position v0.1.0 (/source/tasks/generate-chess960-starting-position)
Nov 28 13:10:45.788 INFO [stderr]     Checking the-twelve-days-of-christmas v0.1.0 (/source/tasks/the-twelve-days-of-christmas)
Nov 28 13:10:46.233 INFO [stderr]     Checking apply-a-digital-filter v0.1.0 (/source/tasks/apply-a-digital-filter)
Nov 28 13:10:46.389 INFO [stderr] warning: the feature `iterator_step_by` has been stable since 1.28.0 and no longer requires an attribute to enable
Nov 28 13:10:46.389 INFO [stderr]  --> tasks/sudoku/src/main.rs:1:12
Nov 28 13:10:46.389 INFO [stderr]   |
Nov 28 13:10:46.390 INFO [stderr] 1 | #![feature(iterator_step_by)]
Nov 28 13:10:46.390 INFO [stderr]   |            ^^^^^^^^^^^^^^^^
Nov 28 13:10:46.390 INFO [stderr]   |
Nov 28 13:10:46.390 INFO [stderr]   = note: #[warn(stable_features)] on by default
Nov 28 13:10:46.391 INFO [stderr] 
Nov 28 13:10:46.965 INFO [stderr]     Checking a-plus-b v0.1.0 (/source/tasks/a-plus-b)
Nov 28 13:10:47.124 INFO [stderr]     Checking pascals-triangle v0.1.0 (/source/tasks/pascals-triangle)
Nov 28 13:10:47.756 INFO [stderr]     Checking element-insertion v0.1.0 (/source/tasks/singly-linked-list/element-insertion)
Nov 28 13:10:48.185 INFO [stderr]     Checking reverse-words-in-a-string v0.1.0 (/source/tasks/reverse-words-in-a-string)
Nov 28 13:10:48.964 INFO [stderr]     Checking filter v0.1.0 (/source/tasks/filter)
Nov 28 13:10:49.625 INFO [stderr]     Checking sort-using-a-custom-comparator v0.1.0 (/source/tasks/sort-using-a-custom-comparator)
Nov 28 13:10:50.016 INFO [stderr]     Checking integer v0.1.0 (/source/tasks/arithmetic/integer)
Nov 28 13:10:50.818 INFO [stderr]     Checking write-entire-file v0.1.0 (/source/tasks/write-entire-file)
Nov 28 13:10:50.880 INFO [stderr]     Checking string-concatenation v0.1.0 (/source/tasks/string-concatenation)
Nov 28 13:10:50.912 INFO [stderr]     Checking abstract-type v0.1.0 (/source/tasks/abstract-type)
Nov 28 13:10:50.934 INFO [stderr]     Checking proper-divisors v0.1.0 (/source/tasks/proper-divisors)
Nov 28 13:10:51.192 INFO [stderr]     Checking address-of-a-variable v0.1.0 (/source/tasks/address-of-a-variable)
Nov 28 13:10:51.696 INFO [stderr]     Checking convert-seconds-to-compound-duration v0.1.0 (/source/tasks/convert-seconds-to-compound-duration)
Nov 28 13:10:52.288 INFO [stderr]     Checking associative-array-creation v0.1.0 (/source/tasks/associative-array/creation)
Nov 28 13:10:52.747 INFO [stderr]     Checking function-definition v0.1.0 (/source/tasks/function-definition)
Nov 28 13:10:53.412 INFO [stderr]     Checking almost-prime v0.1.0 (/source/tasks/almost-prime)
Nov 28 13:10:53.837 INFO [stderr]     Checking csv-data-manipulation v0.1.0 (/source/tasks/csv-data-manipulation)
Nov 28 13:10:53.995 INFO [stderr]     Checking radix-sort v0.1.0 (/source/tasks/sorting-algorithms/radix-sort)
Nov 28 13:10:54.819 INFO [stderr]     Checking tree-traversal v0.1.0 (/source/tasks/tree-traversal)
Nov 28 13:10:55.398 INFO [stderr]     Checking program-name v0.1.0 (/source/tasks/program-name)
Nov 28 13:10:56.312 INFO [stderr]     Checking echo-server v0.1.0 (/source/tasks/echo-server)
Nov 28 13:10:56.376 INFO [stderr]     Checking luhn-test-of-credit-card-numbers v0.1.0 (/source/tasks/luhn-test-of-credit-card-numbers)
Nov 28 13:10:56.712 INFO [stderr]     Checking langtons-ant v0.1.0 (/source/tasks/langtons-ant)
Nov 28 13:10:57.584 INFO [stderr]     Checking function-composition v0.1.0 (/source/tasks/function-composition)
Nov 28 13:10:57.859 INFO [stderr]     Checking sort-an-array-of-composite-structures v0.1.0 (/source/tasks/sort-an-array-of-composite-structures)
Nov 28 13:10:57.973 INFO [stderr]     Checking currying v0.1.0 (/source/tasks/currying)
Nov 28 13:10:58.992 INFO [stderr]     Checking cartesian-product-of-two-or-more-lists v0.1.0 (/source/tasks/cartesian-product-of-two-or-more-lists)
Nov 28 13:10:59.449 INFO [stderr]     Checking while v0.1.0 (/source/tasks/loops/while)
Nov 28 13:10:59.756 INFO [stderr]     Checking sort-disjoint-sublist v0.1.0 (/source/tasks/sort-disjoint-sublist)
Nov 28 13:11:00.789 INFO [stderr]     Checking maximum-triangle-path-sum v0.1.0 (/source/tasks/maximum-triangle-path-sum)
Nov 28 13:11:02.108 INFO [stderr]     Checking value-capture v0.1.0 (/source/tasks/closures/value-capture)
Nov 28 13:11:02.749 INFO [stderr]     Checking sleep v0.1.0 (/source/tasks/sleep)
Nov 28 13:11:03.576 INFO [stderr]     Checking align-columns v0.1.0 (/source/tasks/align-columns)
Nov 28 13:11:03.870 INFO [stderr]     Checking collections v0.1.0 (/source/tasks/collections)
Nov 28 13:11:04.077 INFO [stderr]     Checking towers-of-hanoi v0.1.0 (/source/tasks/towers-of-hanoi)
Nov 28 13:11:05.093 INFO [stderr]     Checking chat-server v0.1.0 (/source/tasks/chat-server)
Nov 28 13:11:05.466 INFO [stderr]     Checking selection-sort v0.1.0 (/source/tasks/sorting-algorithms/selection-sort)
Nov 28 13:11:06.579 INFO [stderr]     Checking modular-inverse v0.1.0 (/source/tasks/modular-inverse)
Nov 28 13:11:06.656 INFO [stderr]     Checking fibonacci-n-step-number-sequences v0.1.0 (/source/tasks/fibonacci-n-step-number-sequences)
Nov 28 13:11:07.132 INFO [stderr]     Checking primality-by-trial-division v0.1.0 (/source/tasks/primality-by-trial-division)
Nov 28 13:11:07.909 INFO [stderr]     Checking execute-a-markov-algorithm v0.1.0 (/source/tasks/execute-a-markov-algorithm)
Nov 28 13:11:09.045 INFO [stderr]     Checking remove-duplicate-elements v0.1.0 (/source/tasks/remove-duplicate-elements)
Nov 28 13:11:09.229 INFO [stderr]     Checking ls v0.1.0 (/source/tasks/unix/ls)
Nov 28 13:11:09.721 INFO [stderr]     Checking do-while v0.1.0 (/source/tasks/loops/do-while)
Nov 28 13:11:10.436 INFO [stderr]     Checking sum-multiples-of-3-and-5 v0.1.0 (/source/tasks/sum-multiples-of-3-and-5)
Nov 28 13:11:10.851 INFO [stderr] warning: the feature `iterator_step_by` has been stable since 1.28.0 and no longer requires an attribute to enable
Nov 28 13:11:10.851 INFO [stderr]  --> tasks/primality-by-trial-division/src/main.rs:1:12
Nov 28 13:11:10.851 INFO [stderr]   |
Nov 28 13:11:10.851 INFO [stderr] 1 | #![feature(iterator_step_by)]
Nov 28 13:11:10.851 INFO [stderr]   |            ^^^^^^^^^^^^^^^^
Nov 28 13:11:10.864 INFO [stderr]   |
Nov 28 13:11:10.864 INFO [stderr]   = note: #[warn(stable_features)] on by default
Nov 28 13:11:10.864 INFO [stderr] 
Nov 28 13:11:11.048 INFO [stderr]     Checking pancake-sort v0.1.0 (/source/tasks/sorting-algorithms/pancake-sort)
Nov 28 13:11:11.560 INFO [stderr]     Checking map-range v0.1.0 (/source/tasks/map-range)
Nov 28 13:11:12.192 INFO [stderr]     Checking even-or-odd v0.1.0 (/source/tasks/even-or-odd)
Nov 28 13:11:12.269 INFO [stderr]     Checking alignment v0.1.0 (/source/tasks/levenshtein-distance/alignment)
Nov 28 13:11:12.786 INFO [stderr]     Checking counting-sort v0.1.0 (/source/tasks/sorting-algorithms/counting-sort)
Nov 28 13:11:13.333 INFO [stderr]     Checking enumerations v0.1.0 (/source/tasks/enumerations)
Nov 28 13:11:13.869 INFO [stderr]     Checking sum-of-a-series v0.1.0 (/source/tasks/sum-of-a-series)
Nov 28 13:11:15.516 INFO [stderr]     Checking rename-a-file v0.1.0 (/source/tasks/rename-a-file)
Nov 28 13:11:15.798 INFO [stderr]     Checking call-an-object-method v0.1.0 (/source/tasks/call-an-object-method)
Nov 28 13:11:18.001 INFO [stderr]     Checking definition v0.1.0 (/source/tasks/queue/definition)
Nov 28 13:11:18.069 INFO [stderr]     Checking gnome-sort v0.1.0 (/source/tasks/sorting-algorithms/gnome-sort)
Nov 28 13:11:19.596 INFO [stderr]     Checking aliquot-sequence-classifications v0.1.0 (/source/tasks/aliquot-sequence-classifications)
Nov 28 13:11:19.717 INFO [stderr]     Checking read-config-file v0.1.0 (/source/tasks/read-a-configuration-file)
Nov 28 13:11:19.717 INFO [stderr]     Checking ludic-numbers v0.1.0 (/source/tasks/ludic-numbers)
Nov 28 13:11:19.872 INFO [stderr]     Checking caesar-cipher v0.1.0 (/source/tasks/caesar-cipher)
Nov 28 13:11:21.345 INFO [stderr]     Checking real-constants-and-functions v0.1.0 (/source/tasks/real-constants-and-functions)
Nov 28 13:11:21.558 INFO [stderr]     Checking binary-search v0.1.0 (/source/tasks/binary-search)
Nov 28 13:11:23.081 INFO [stderr]     Checking benfords-law v0.1.0 (/source/tasks/benfords-law)
Nov 28 13:11:23.170 INFO [stderr]     Checking strip-comments-from-a-string v0.1.0 (/source/tasks/strip-comments-from-a-string)
Nov 28 13:11:23.632 INFO [stderr] warning: the feature `iterator_step_by` has been stable since 1.28.0 and no longer requires an attribute to enable
Nov 28 13:11:23.632 INFO [stderr]  --> tasks/ludic-numbers/src/main.rs:1:12
Nov 28 13:11:23.632 INFO [stderr]   |
Nov 28 13:11:23.632 INFO [stderr] 1 | #![feature(iterator_step_by)] // for `step_by`
Nov 28 13:11:23.632 INFO [stderr]   |            ^^^^^^^^^^^^^^^^
Nov 28 13:11:23.632 INFO [stderr]   |
Nov 28 13:11:23.632 INFO [stderr]   = note: #[warn(stable_features)] on by default
Nov 28 13:11:23.632 INFO [stderr] 
Nov 28 13:11:23.800 INFO [stderr]     Checking zero-to-the-zero-power v0.1.0 (/source/tasks/zero-to-the-zero-power)
Nov 28 13:11:24.706 INFO [stderr]     Checking count-in-octal v0.1.0 (/source/tasks/count-in-octal)
Nov 28 13:11:24.770 INFO [stderr]     Checking pangram-checker v0.1.0 (/source/tasks/pangram-checker)
Nov 28 13:11:25.415 INFO [stderr]     Checking middle-three-digits v0.1.0 (/source/tasks/middle-three-digits)
Nov 28 13:11:26.260 INFO [stderr]     Checking combinations v0.1.0 (/source/tasks/combinations)
Nov 28 13:11:26.609 INFO [stderr]     Checking vector-products v0.1.0 (/source/tasks/vector-products)
Nov 28 13:11:28.746 INFO [stderr]     Checking string-comparison v0.1.0 (/source/tasks/string-comparison)
Nov 28 13:11:29.060 INFO [stderr]     Checking graphical v0.1.0 (/source/tasks/hello-world/graphical)
Nov 28 13:11:29.080 INFO [stderr]     Checking levenshtein-distance v0.1.0 (/source/tasks/levenshtein-distance)
Nov 28 13:11:29.088 INFO [stderr]     Checking web-server v0.1.0 (/source/tasks/hello-world/web-server)
Nov 28 13:11:29.089 INFO [stderr]     Checking repeat v0.1.0 (/source/tasks/repeat)
Nov 28 13:11:29.864 INFO [stderr]     Checking fibonacci-sequence v0.1.0 (/source/tasks/fibonacci-sequence)
Nov 28 13:11:30.205 INFO [stderr]     Checking jensens-device v0.1.0 (/source/tasks/jensens-device)
Nov 28 13:11:30.876 INFO [stderr]     Checking leap-year v0.1.0 (/source/tasks/leap-year)
Nov 28 13:11:31.933 INFO [stderr]     Checking file-input-output v0.1.0 (/source/tasks/file-input-output)
Nov 28 13:11:32.084 INFO [stderr]     Checking doubly-linked-list-element-definition v0.1.0 (/source/tasks/doubly-linked-list/element-definition)
Nov 28 13:11:33.192 INFO [stderr]     Checking greatest-subsequential-sum v0.1.0 (/source/tasks/greatest-subsequential-sum)
Nov 28 13:11:33.932 INFO [stderr]     Checking arena-storage-pool v0.1.0 (/source/tasks/arena-storage-pool)
Nov 28 13:11:34.611 INFO [stderr]     Checking catamorphism v0.1.0 (/source/tasks/catamorphism)
Nov 28 13:11:34.824 INFO [stderr]     Checking 99-bottles-of-beer v0.1.0 (/source/tasks/99-bottles-of-beer)
Nov 28 13:11:35.244 INFO [stderr]     Checking comb-sort v0.1.0 (/source/tasks/sorting-algorithms/comb-sort)
Nov 28 13:11:36.120 INFO [stderr]     Checking command-line-arguments v0.1.0 (/source/tasks/command-line-arguments)
Nov 28 13:11:36.756 INFO [stderr]     Checking sockets v0.1.0 (/source/tasks/sockets)
Nov 28 13:11:37.201 INFO [stderr]     Checking short-circuit-evaluation v0.1.0 (/source/tasks/short-circuit-evaluation)
Nov 28 13:11:38.608 INFO [stderr]     Checking wireworld v0.1.0 (/source/tasks/wireworld)
Nov 28 13:11:38.649 INFO [stderr]     Checking determine-if-a-string-is-numeric v0.1.0 (/source/tasks/determine-if-a-string-is-numeric)
Nov 28 13:11:39.550 INFO [stderr]     Checking execute-hq9-plus v0.1.0 (/source/tasks/execute-hq9-plus)
Nov 28 13:11:40.480 INFO [stderr]     Checking hash-join v0.1.0 (/source/tasks/hash-join)
Nov 28 13:11:41.949 INFO [stderr]     Checking comma-quibbling v0.1.0 (/source/tasks/comma-quibbling)
Nov 28 13:11:43.146 INFO [stderr]     Checking magic-squares-of-odd-order v0.1.0 (/source/tasks/magic-squares-of-odd-order)
Nov 28 13:11:43.598 INFO [stderr]     Checking dns-query v0.1.0 (/source/tasks/dns-query)
Nov 28 13:11:44.116 INFO [stderr]     Checking infinity v0.1.0 (/source/tasks/infinity)
Nov 28 13:11:44.800 INFO [stderr]     Checking md4 v0.1.0 (/source/tasks/md4)
Nov 28 13:11:46.828 INFO [stderr]     Checking man-or-boy-test v0.1.0 (/source/tasks/man-or-boy-test)
Nov 28 13:11:50.230 INFO [stderr]     Checking menu v0.1.0 (/source/tasks/menu)
Nov 28 13:11:50.675 INFO [stderr]     Checking crc-32 v0.1.0 (/source/tasks/crc-32)
Nov 28 13:11:50.804 INFO [stderr] error[E0599]: no function or associated item named `new` found for type `arena::TypedArena<_>` in the current scope
Nov 28 13:11:50.805 INFO [stderr]   --> tasks/arena-storage-pool/src/main.rs:12:17
Nov 28 13:11:50.805 INFO [stderr]    |
Nov 28 13:11:50.805 INFO [stderr] 12 |     let arena = TypedArena::new();
Nov 28 13:11:50.805 INFO [stderr]    |                 ^^^^^^^^^^^^^^^ function or associated item not found in `arena::TypedArena<_>`
Nov 28 13:11:50.810 INFO [stderr] 
Nov 28 13:11:50.824 INFO [stderr] error: aborting due to previous error
Nov 28 13:11:50.825 INFO [stderr] error[E0599]: no function or associated item named `new` found for type `arena::TypedArena<_>` in the current scope
Nov 28 13:11:50.826 INFO [stderr]   --> tasks/arena-storage-pool/src/main.rs:12:17
Nov 28 13:11:50.826 INFO [stderr]    |
Nov 28 13:11:50.826 INFO [stderr] 12 |     let arena = TypedArena::new();
Nov 28 13:11:50.827 INFO [stderr]    |                 ^^^^^^^^^^^^^^^ function or associated item not found in `arena::TypedArena<_>`
Nov 28 13:11:50.827 INFO [stderr] 
Nov 28 13:11:50.840 INFO [stderr] 
Nov 28 13:11:50.841 INFO [stderr] For more information about this error, try `rustc --explain E0599`.
Nov 28 13:11:50.869 INFO [stderr] error: aborting due to previous error
Nov 28 13:11:50.869 INFO [stderr] 
Nov 28 13:11:50.870 INFO [stderr] For more information about this error, try `rustc --explain E0599`.
Nov 28 13:11:50.882 INFO [stderr] error: Could not compile `arena-storage-pool`.
Nov 28 13:11:50.882 INFO [stderr] warning: build failed, waiting for other jobs to finish...
Nov 28 13:11:50.905 INFO [stderr] error: Could not compile `arena-storage-pool`.
Nov 28 13:11:50.906 INFO [stderr] warning: build failed, waiting for other jobs to finish...
Nov 28 13:11:52.826 INFO [stderr] warning: the feature `iterator_step_by` has been stable since 1.28.0 and no longer requires an attribute to enable
Nov 28 13:11:52.826 INFO [stderr]  --> tasks/ludic-numbers/src/main.rs:1:12
Nov 28 13:11:52.826 INFO [stderr]   |
Nov 28 13:11:52.826 INFO [stderr] 1 | #![feature(iterator_step_by)] // for `step_by`
Nov 28 13:11:52.826 INFO [stderr]   |            ^^^^^^^^^^^^^^^^
Nov 28 13:11:52.826 INFO [stderr]   |
Nov 28 13:11:52.828 INFO [stderr]   = note: #[warn(stable_features)] on by default
Nov 28 13:11:52.828 INFO [stderr] 
Nov 28 13:11:53.080 INFO [stderr] error: build failed
Nov 28 13:11:53.083 INFO [stderr] su: No module specific data is present
Nov 28 13:11:54.448 INFO running `"docker" "inspect" "a25e7063a8d1719389d23c6a5faae53277b3144f14dc3a3b8b6a1affc64d66b7"`
Nov 28 13:11:54.725 INFO running `"docker" "rm" "-f" "a25e7063a8d1719389d23c6a5faae53277b3144f14dc3a3b8b6a1affc64d66b7"`
Nov 28 13:11:55.052 INFO [stdout] a25e7063a8d1719389d23c6a5faae53277b3144f14dc3a3b8b6a1affc64d66b7