[INFO] cloning repository https://github.com/Hoverbear/rust-rosetta
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/Hoverbear/rust-rosetta" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FHoverbear%2Frust-rosetta", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FHoverbear%2Frust-rosetta'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] a86f82a94d496a469f96714131c111c21631576b
[INFO] checking Hoverbear/rust-rosetta against try#a7a572ce3edd6d476191fbfe92c9c1986e009b34 for pr-87190-3
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FHoverbear%2Frust-rosetta" "/workspace/builds/worker-42/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-42/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/Hoverbear/rust-rosetta on toolchain a7a572ce3edd6d476191fbfe92c9c1986e009b34
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+a7a572ce3edd6d476191fbfe92c9c1986e009b34" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] removed /workspace/builds/worker-42/source/rust-toolchain
[INFO] started tweaking git repo https://github.com/Hoverbear/rust-rosetta
[INFO] finished tweaking git repo https://github.com/Hoverbear/rust-rosetta
[INFO] tweaked toml for git repo https://github.com/Hoverbear/rust-rosetta written to /workspace/builds/worker-42/source/Cargo.toml
[INFO] crate git repo https://github.com/Hoverbear/rust-rosetta already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+a7a572ce3edd6d476191fbfe92c9c1986e009b34" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded squote v0.1.2
[INFO] [stderr]   Downloaded ord_subset v3.1.1
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[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-42/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-42/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" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+a7a572ce3edd6d476191fbfe92c9c1986e009b34" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] fa0044946696c31dfdcdb1cc7ca03cf63082c7cad55aa47c2e7f87087d19177e
[INFO] running `Command { std: "docker" "start" "-a" "fa0044946696c31dfdcdb1cc7ca03cf63082c7cad55aa47c2e7f87087d19177e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "fa0044946696c31dfdcdb1cc7ca03cf63082c7cad55aa47c2e7f87087d19177e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "fa0044946696c31dfdcdb1cc7ca03cf63082c7cad55aa47c2e7f87087d19177e", kill_on_drop: false }`
[INFO] [stdout] fa0044946696c31dfdcdb1cc7ca03cf63082c7cad55aa47c2e7f87087d19177e
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-42/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-42/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" "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" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+a7a572ce3edd6d476191fbfe92c9c1986e009b34" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 715b4704001073bdac010b47f3e9f04ec6021996152cfd787fd8cc7d610c0272
[INFO] running `Command { std: "docker" "start" "-a" "715b4704001073bdac010b47f3e9f04ec6021996152cfd787fd8cc7d610c0272", kill_on_drop: false }`
[INFO] [stderr] Copying to /tmp/fixit
[INFO] [stderr] Running `cargo fix --edition`
[INFO] [stderr] note: Switching to Edition 2021 will enable the use of the version 2 feature resolver in Cargo.
[INFO] [stderr] This may cause some dependencies to be built with fewer features enabled than previously.
[INFO] [stderr] More information about the resolver changes may be found at https://doc.rust-lang.org/nightly/edition-guide/rust-2021/default-cargo-resolver.html
[INFO] [stderr] When building the following dependencies, the given features will no longer be used:
[INFO] [stderr] 
[INFO] [stderr]   log v0.4.14 (as host dependency): std
[INFO] [stderr]   regex v1.4.3 (as host dependency): aho-corasick, default, memchr, pattern, perf, perf-cache, perf-dfa, perf-inline, perf-literal, thread_local, unicode, unicode-age, unicode-bool, unicode-case, unicode-gencat, unicode-script, unicode-segment
[INFO] [stderr]   regex-syntax v0.6.22 (as host dependency): default, unicode, unicode-age, unicode-bool, unicode-case, unicode-gencat, unicode-script, unicode-segment
[INFO] [stderr]   syn v1.0.60 (as host dependency): extra-traits, visit
[INFO] [stderr] 
[INFO] [stderr]    Compiling libc v0.2.87
[INFO] [stderr]    Compiling autocfg v1.0.1
[INFO] [stderr]     Checking cfg-if v1.0.0
[INFO] [stderr]    Compiling libm v0.2.1
[INFO] [stderr]     Checking lazy_static v1.4.0
[INFO] [stderr]     Checking ppv-lite86 v0.2.10
[INFO] [stderr]    Compiling getrandom v0.1.16
[INFO] [stderr]    Compiling proc-macro2 v1.0.24
[INFO] [stderr]    Compiling unicode-xid v0.2.1
[INFO] [stderr]    Compiling syn v1.0.60
[INFO] [stderr]    Compiling bitflags v1.2.1
[INFO] [stderr]    Compiling memchr v2.3.4
[INFO] [stderr]    Compiling serde_derive v1.0.123
[INFO] [stderr]    Compiling serde v1.0.123
[INFO] [stderr]    Compiling version_check v0.9.2
[INFO] [stderr]    Compiling log v0.4.14
[INFO] [stderr]    Compiling ryu v1.0.5
[INFO] [stderr]     Checking itoa v0.4.7
[INFO] [stderr]    Compiling cc v1.0.67
[INFO] [stderr]     Checking cfg-if v0.1.10
[INFO] [stderr]    Compiling serde_json v1.0.64
[INFO] [stderr]     Checking byteorder v1.4.2
[INFO] [stderr]     Checking slab v0.4.2
[INFO] [stderr]     Checking once_cell v1.7.2
[INFO] [stderr]     Checking regex-syntax v0.6.22
[INFO] [stderr]     Checking either v1.6.1
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[INFO] [stderr]     Checking foreign-types-shared v0.1.1
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[INFO] [stderr]    Compiling native-tls v0.2.7
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[INFO] [stderr]     Checking tower-service v0.3.1
[INFO] [stderr]     Checking ansi_term v0.11.0
[INFO] [stderr]    Compiling encoding_rs v0.8.28
[INFO] [stderr]     Checking httpdate v0.3.2
[INFO] [stderr]     Checking unicode-width v0.1.8
[INFO] [stderr]    Compiling rayon-core v1.9.0
[INFO] [stderr]     Checking mime v0.3.16
[INFO] [stderr]     Checking vec_map v0.8.2
[INFO] [stderr]     Checking base64 v0.13.0
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[INFO] [stderr]     Checking ipnet v2.3.0
[INFO] [stderr]     Checking gimli v0.23.0
[INFO] [stderr]    Compiling typenum v1.12.0
[INFO] [stderr]     Checking object v0.23.0
[INFO] [stderr]     Checking rustc-demangle v0.1.18
[INFO] [stderr]    Compiling anyhow v1.0.38
[INFO] [stderr]     Checking semver-parser v0.7.0
[INFO] [stderr]     Checking plotters-backend v0.3.0
[INFO] [stderr]    Compiling unicode-segmentation v1.7.1
[INFO] [stderr]     Checking half v1.7.1
[INFO] [stderr]     Checking pathdiff v0.1.0
[INFO] [stderr]     Checking oorandom v11.1.3
[INFO] [stderr]    Compiling khronos_api v3.1.0
[INFO] [stderr]     Checking rawpointer v0.2.1
[INFO] [stderr]    Compiling syn v0.15.44
[INFO] [stderr]    Compiling radium v0.5.3
[INFO] [stderr]     Checking adler32 v1.2.0
[INFO] [stderr]     Checking static_assertions v1.1.0
[INFO] [stderr]    Compiling nix v0.14.1
[INFO] [stderr]    Compiling lexical-core v0.7.5
[INFO] [stderr]     Checking void v1.0.2
[INFO] [stderr]    Compiling num-derive v0.2.5
[INFO] [stderr]     Checking lzw v0.10.0
[INFO] [stderr]     Checking arrayvec v0.5.2
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[INFO] [stderr]    Compiling getrandom v0.2.2
[INFO] [stderr]     Checking wyz v0.2.0
[INFO] [stderr]     Checking byte-tools v0.3.1
[INFO] [stderr]     Checking tap v1.0.1
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[INFO] [stderr]     Checking color_quant v1.1.0
[INFO] [stderr]     Checking scoped_threadpool v0.1.9
[INFO] [stderr]    Compiling winapi-build v0.1.1
[INFO] [stderr]     Checking opaque-debug v0.2.3
[INFO] [stderr]     Checking spin v0.5.2
[INFO] [stderr]     Checking winapi v0.2.8
[INFO] [stderr]     Checking typed-arena v1.7.0
[INFO] [stderr]     Checking term v0.4.6
[INFO] [stderr]    Compiling libm v0.1.4
[INFO] [stderr]     Checking permutohedron v0.2.4
[INFO] [stderr]     Checking difference v2.0.0
[INFO] [stderr]    Compiling matrixmultiply v0.1.15
[INFO] [stderr]     Checking pangram-checker v0.1.0 (/tmp/fixit/tasks/pangram-checker)
[INFO] [stderr]     Checking assert_approx_eq v1.1.0
[INFO] [stderr]     Checking quick-error v1.2.3
[INFO] [stderr]     Checking prime-decomposition v0.1.0 (/tmp/fixit/tasks/prime-decomposition)
[INFO] [stderr]     Checking predicates-core v1.0.2
[INFO] [stderr]     Checking array-init v0.1.1
[INFO] [stderr]     Checking run-length-encoding v0.1.0 (/tmp/fixit/tasks/run-length-encoding)
[INFO] [stderr]     Checking entropy v0.1.0 (/tmp/fixit/tasks/entropy)
[INFO] [stderr]     Checking regex-syntax v0.3.9
[INFO] [stderr]     Checking termcolor v1.1.2
[INFO] [stderr]    Compiling paste v1.0.5
[INFO] [stderr]    Compiling ndarray v0.14.0
[INFO] [stderr]     Checking aks-test-for-primes v0.1.0 (/tmp/fixit/tasks/aks-test-for-primes)
[INFO] [stderr]     Checking utf8-ranges v0.1.3
[INFO] [stderr]    Compiling doc-comment v0.3.3
[INFO] [stderr]     Checking rawpointer v0.1.0
[INFO] [stderr]     Checking ord_subset v3.1.1
[INFO] [stderr]     Checking lazy_static v0.1.16
[INFO] [stderr]     Checking treeline v0.1.0
[INFO] [stderr]     Checking n-queens-problem v0.1.0 (/tmp/fixit/tasks/n-queens-problem)
[INFO] [stderr]     Checking rustc-serialize v0.3.24
[INFO] [stderr]     Checking factorial v0.1.0 (/tmp/fixit/tasks/factorial)
[INFO] [stderr]    Compiling write-to-a-windows-event-log v0.1.0 (/tmp/fixit/tasks/write-to-a-windows-event-log)
[INFO] [stderr]     Checking hex v0.3.2
[INFO] [stderr]     Checking luhn-test-of-credit-card-numbers v0.1.0 (/tmp/fixit/tasks/luhn-test-of-credit-card-numbers)
[INFO] [stderr]    Compiling unindent v0.1.7
[INFO] [stderr]     Checking gnuplot v0.0.26
[INFO] [stderr]     Checking primes v0.3.0
[INFO] [stderr]    Migrating tasks/aks-test-for-primes/src/lib.rs from 2015 edition to 2018
[INFO] [stderr]     Checking convert-base v1.1.0
[INFO] [stderr]     Checking ackermann-function v0.1.0 (/tmp/fixit/tasks/ackermann-function)
[INFO] [stderr]     Checking rep-string v0.1.0 (/tmp/fixit/tasks/rep-string)
[INFO] [stderr]     Checking maximum-triangle-path-sum v0.1.0 (/tmp/fixit/tasks/maximum-triangle-path-sum)
[INFO] [stderr]     Checking the-twelve-days-of-christmas v0.1.0 (/tmp/fixit/tasks/the-twelve-days-of-christmas)
[INFO] [stderr]     Checking mode v0.1.0 (/tmp/fixit/tasks/averages/mode)
[INFO] [stderr]     Checking csv-data-manipulation v0.1.0 (/tmp/fixit/tasks/csv-data-manipulation)
[INFO] [stderr]     Checking longest-common-subsequence v0.1.0 (/tmp/fixit/tasks/longest-common-subsequence)
[INFO] [stderr]     Checking median v0.1.0 (/tmp/fixit/tasks/averages/median)
[INFO] [stderr]     Checking ls v0.1.1 (/tmp/fixit/tasks/unix/ls)
[INFO] [stderr]     Checking element-definition v0.1.0 (/tmp/fixit/tasks/singly-linked-list/element-definition)
[INFO] [stderr]     Checking encode v0.1.0 (/tmp/fixit/tasks/roman-numerals/encode)
[INFO] [stderr]     Checking root-mean-square v0.1.0 (/tmp/fixit/tasks/averages/root-mean-square)
[INFO] [stderr]     Checking integer v0.1.0 (/tmp/fixit/tasks/arithmetic/integer)
[INFO] [stderr]     Checking iterated-digits-squaring v0.1.0 (/tmp/fixit/tasks/iterated-digits-squaring)
[INFO] [stderr]     Checking burrows-wheeler-transform v0.1.0 (/tmp/fixit/tasks/burrows-wheeler-transform)
[INFO] [stderr]     Checking count-occurrences-of-a-substring v0.1.0 (/tmp/fixit/tasks/count-occurrences-of-a-substring)
[INFO] [stderr]     Checking zero-to-the-zero-power v0.1.0 (/tmp/fixit/tasks/zero-to-the-zero-power)
[INFO] [stderr]     Checking jaro-distance v0.1.0 (/tmp/fixit/tasks/jaro-distance)
[INFO] [stderr]    Migrating tasks/entropy/src/lib.rs from 2015 edition to 2018
[INFO] [stderr]     Checking quine v0.1.0 (/tmp/fixit/tasks/quine)
[INFO] [stderr]     Checking enforced-immutability v0.1.0 (/tmp/fixit/tasks/enforced-immutability)
[INFO] [stderr]     Checking associative-array-creation v0.1.0 (/tmp/fixit/tasks/associative-array/creation)
[INFO] [stderr]     Checking sum-of-a-series v0.1.0 (/tmp/fixit/tasks/sum-of-a-series)
[INFO] [stderr]     Checking sum-digits-of-an-integer v0.1.0 (/tmp/fixit/tasks/sum-digits-of-an-integer)
[INFO] [stderr]     Checking globally-replace-text-in-several-files v0.1.0 (/tmp/fixit/tasks/globally-replace-text-in-several-files)
[INFO] [stderr]    Migrating tasks/zero-to-the-zero-power/src/main.rs from 2015 edition to 2018
[INFO] [stderr]    Migrating tasks/run-length-encoding/src/lib.rs from 2015 edition to 2018
[INFO] [stderr]    Migrating tasks/averages/root-mean-square/src/main.rs from 2015 edition to 2018
[INFO] [stderr]    Migrating tasks/jaro-distance/src/main.rs from 2015 edition to 2018
[INFO] [stderr]     Checking create-a-file v0.1.0 (/tmp/fixit/tasks/create-a-file)
[INFO] [stderr]     Checking sudoku v0.1.0 (/tmp/fixit/tasks/sudoku)
[INFO] [stderr]     Checking element-wise-operations v0.1.0 (/tmp/fixit/tasks/element-wise-operations)
[INFO] [stderr]     Checking foreach v0.1.0 (/tmp/fixit/tasks/loops/foreach)
[INFO] [stderr]     Checking call-an-object-method v0.1.0 (/tmp/fixit/tasks/call-an-object-method)
[INFO] [stderr]     Checking water-collected-between-towers v0.1.0 (/tmp/fixit/tasks/water-collected-between-towers)
[INFO] [stderr]     Checking standard-error v0.1.0 (/tmp/fixit/tasks/hello-world/standard-error)
[INFO] [stderr]     Checking shell-sort v0.1.0 (/tmp/fixit/tasks/sorting-algorithms/shell-sort)
[INFO] [stderr]     Checking permutations-with-repetitions v0.1.0 (/tmp/fixit/tasks/permutations-with-repetitions)
[INFO] [stderr]     Checking even-or-odd v0.1.0 (/tmp/fixit/tasks/even-or-odd)
[INFO] [stderr]     Checking langtons-ant v0.1.0 (/tmp/fixit/tasks/langtons-ant)
[INFO] [stderr]     Checking filter v0.1.0 (/tmp/fixit/tasks/filter)
[INFO] [stderr]     Checking arithmetic-geometric-mean v0.1.0 (/tmp/fixit/tasks/arithmetic-geometric-mean)
[INFO] [stderr]     Checking echo-server v0.1.0 (/tmp/fixit/tasks/echo-server)
[INFO] [stderr]     Checking population-count v0.1.0 (/tmp/fixit/tasks/population-count)
[INFO] [stderr]     Checking check-that-file-exists v0.1.0 (/tmp/fixit/tasks/check-that-file-exists)
[INFO] [stderr]    Migrating tasks/associative-array/creation/src/main.rs from 2015 edition to 2018
[INFO] [stderr]     Checking define-a-primitive-data-type v0.1.0 (/tmp/fixit/tasks/define-a-primitive-data-type)
[INFO] [stderr]     Checking hofstadter-q-sequence v0.1.0 (/tmp/fixit/tasks/hofstadter-q-sequence)
[INFO] [stderr]     Checking catalan-numbers v0.1.0 (/tmp/fixit/tasks/catalan-numbers)
[INFO] [stderr]     Checking synchronous-concurrency v0.1.0 (/tmp/fixit/tasks/synchronous-concurrency)
[INFO] [stderr]     Checking sort-an-integer-array v0.1.0 (/tmp/fixit/tasks/sort-an-integer-array)
[INFO] [stderr]     Checking generate-lower-case-ascii-alphabet v0.1.0 (/tmp/fixit/tasks/generate-lower-case-ascii-alphabet)
[INFO] [stderr]     Checking sort-using-a-custom-comparator v0.1.0 (/tmp/fixit/tasks/sort-using-a-custom-comparator)
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[INFO] [stderr]     Checking reverse-words-in-a-string v0.1.0 (/tmp/fixit/tasks/reverse-words-in-a-string)
[INFO] [stderr]     Checking display-linear-combination v0.1.0 (/tmp/fixit/tasks/display-linear-combination)
[INFO] [stderr]     Checking anonymous-recursion v0.1.0 (/tmp/fixit/tasks/anonymous-recursion)
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[INFO] [stderr]     Checking sleep-sort v0.1.0 (/tmp/fixit/tasks/sorting-algorithms/sleep-sort)
[INFO] [stderr]     Checking hello-world-text v0.1.0 (/tmp/fixit/tasks/hello-world/text)
[INFO] [stderr]    Migrating tasks/synchronous-concurrency/src/main.rs from 2015 edition to 2018
[INFO] [stderr]     Checking remove-duplicate-elements v0.1.0 (/tmp/fixit/tasks/remove-duplicate-elements)
[INFO] [stderr]    Migrating tasks/quine/src/main.rs from 2015 edition to 2018
[INFO] [stderr]     Checking ordered-words v0.1.0 (/tmp/fixit/tasks/ordered-words)
[INFO] [stderr]    Migrating tasks/reverse-words-in-a-string/src/main.rs from 2015 edition to 2018
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[INFO] [stderr]     Checking counting-sort v0.1.0 (/tmp/fixit/tasks/sorting-algorithms/counting-sort)
[INFO] [stderr]     Checking higher-order-functions v0.1.0 (/tmp/fixit/tasks/higher-order-functions)
[INFO] [stderr]    Migrating tasks/sorting-algorithms/counting-sort/src/main.rs from 2015 edition to 2018
[INFO] [stderr]    Migrating tasks/higher-order-functions/src/main.rs from 2015 edition to 2018
[INFO] [stderr]     Checking abbreviations-easy v0.1.0 (/tmp/fixit/tasks/abbreviations-easy)
[INFO] [stderr]    Migrating tasks/abbreviations-easy/src/main.rs from 2018 edition to 2021
[INFO] [stderr]     Checking text v0.1.0 (/tmp/fixit/tasks/user-input/text)
[INFO] [stderr]    Migrating tasks/user-input/text/src/main.rs from 2015 edition to 2018
[INFO] [stderr]     Checking dining-philosophers v0.1.0 (/tmp/fixit/tasks/dining-philosophers)
[INFO] [stderr]    Migrating tasks/dining-philosophers/src/main.rs from 2015 edition to 2018
[INFO] [stderr]     Checking zig-zag-matrix v0.1.0 (/tmp/fixit/tasks/zig-zag-matrix)
[INFO] [stderr]    Migrating tasks/zig-zag-matrix/src/main.rs from 2015 edition to 2018
[INFO] [stderr]     Checking strip-characters-from-a-string v0.1.0 (/tmp/fixit/tasks/strip-characters-from-a-string)
[INFO] [stderr]    Migrating tasks/strip-characters-from-a-string/src/main.rs from 2018 edition to 2021
[INFO] [stderr]     Checking parametric-polymorphism v0.1.0 (/tmp/fixit/tasks/parametric-polymorphism)
[INFO] [stderr]    Migrating tasks/parametric-polymorphism/src/main.rs from 2015 edition to 2018
[INFO] [stderr]     Checking character-codes v0.1.0 (/tmp/fixit/tasks/character-codes)
[INFO] [stderr]    Migrating tasks/character-codes/src/main.rs from 2015 edition to 2018
[INFO] [stderr]     Checking fivenum v0.1.0 (/tmp/fixit/tasks/fivenum)
[INFO] [stderr]    Migrating tasks/fivenum/src/main.rs from 2018 edition to 2021
[INFO] [stderr]     Checking cramers-rule v0.1.0 (/tmp/fixit/tasks/cramers-rule)
[INFO] [stderr]    Migrating tasks/cramers-rule/src/main.rs from 2015 edition to 2018
[INFO] [stderr]     Checking accumulator-factory v0.1.0 (/tmp/fixit/tasks/accumulator-factory)
[INFO] [stderr]    Migrating tasks/accumulator-factory/src/main.rs from 2015 edition to 2018
[INFO] [stderr]     Checking execute-a-markov-algorithm v0.1.0 (/tmp/fixit/tasks/execute-a-markov-algorithm)
[INFO] [stderr]    Migrating tasks/execute-a-markov-algorithm/src/main.rs from 2015 edition to 2018
[INFO] [stderr]     Checking cocktail-sort v0.1.0 (/tmp/fixit/tasks/sorting-algorithms/cocktail-sort)
[INFO] [stderr]    Migrating tasks/sorting-algorithms/cocktail-sort/src/main.rs from 2015 edition to 2018
[INFO] [stderr]     Checking animation v0.1.0 (/tmp/fixit/tasks/animation)
[INFO] [stderr]    Migrating tasks/animation/src/main.rs from 2015 edition to 2018
[INFO] [stderr]     Checking find-limit-of-recursion v0.1.0 (/tmp/fixit/tasks/find-limit-of-recursion)
[INFO] [stderr]    Migrating tasks/find-limit-of-recursion/src/main.rs from 2015 edition to 2018
[INFO] [stderr]     Checking bitwise-operations v0.1.0 (/tmp/fixit/tasks/bitwise-operations)
[INFO] [stderr]     Checking cartesian-product-of-two-or-more-lists v0.1.0 (/tmp/fixit/tasks/cartesian-product-of-two-or-more-lists)
[INFO] [stderr]    Migrating tasks/bitwise-operations/src/main.rs from 2015 edition to 2018
[INFO] [stderr]    Migrating tasks/cartesian-product-of-two-or-more-lists/src/main.rs from 2015 edition to 2018
[INFO] [stderr]     Checking string-case v0.1.0 (/tmp/fixit/tasks/string-case)
[INFO] [stderr]    Migrating tasks/string-case/src/main.rs from 2015 edition to 2018
[INFO] [stderr]     Checking chat-server v0.1.0 (/tmp/fixit/tasks/chat-server)
[INFO] [stderr]    Migrating tasks/chat-server/src/main.rs from 2015 edition to 2018
[INFO] [stderr]     Checking permutation-test v0.1.0 (/tmp/fixit/tasks/permutation-test)
[INFO] [stderr]    Migrating tasks/permutation-test/src/main.rs from 2015 edition to 2018
[INFO] [stderr]     Checking combinations v0.1.0 (/tmp/fixit/tasks/combinations)
[INFO] [stderr]    Migrating tasks/combinations/src/bin/recursive.rs from 2015 edition to 2018
[INFO] [stderr]     Checking sort-disjoint-sublist v0.1.0 (/tmp/fixit/tasks/sort-disjoint-sublist)
[INFO] [stderr]    Migrating tasks/sort-disjoint-sublist/src/main.rs from 2015 edition to 2018
[INFO] [stderr]     Checking file-input-output v0.1.0 (/tmp/fixit/tasks/file-input-output)
[INFO] [stderr]    Migrating tasks/file-input-output/src/main.rs from 2015 edition to 2018
[INFO] [stderr]     Checking sha-1 v0.1.0 (/tmp/fixit/tasks/sha-1)
[INFO] [stderr]    Migrating tasks/sha-1/src/main.rs from 2015 edition to 2018
[INFO] [stderr]     Checking for v0.1.0 (/tmp/fixit/tasks/loops/for)
[INFO] [stderr]    Migrating tasks/loops/for/src/main.rs from 2015 edition to 2018
[INFO] [stderr]     Checking balanced-ternary v0.1.0 (/tmp/fixit/tasks/balanced-ternary)
[INFO] [stderr]    Migrating tasks/balanced-ternary/src/main.rs from 2018 edition to 2021
[INFO] [stderr]     Checking short-circuit-evaluation v0.1.0 (/tmp/fixit/tasks/short-circuit-evaluation)
[INFO] [stderr]    Migrating tasks/short-circuit-evaluation/src/main.rs from 2015 edition to 2018
[INFO] [stderr]     Checking compound-data-type v0.1.0 (/tmp/fixit/tasks/compound-data-type)
[INFO] [stderr]    Migrating tasks/compound-data-type/src/main.rs from 2015 edition to 2018
[INFO] [stderr]     Checking sequence-of-primes-by-trial-division v0.1.0 (/tmp/fixit/tasks/sequence-of-primes-by-trial-division)
[INFO] [stderr]    Migrating tasks/sequence-of-primes-by-trial-division/src/main.rs from 2018 edition to 2021
[INFO] [stderr]     Checking read-a-file-line-by-line v0.1.0 (/tmp/fixit/tasks/read-a-file-line-by-line)
[INFO] [stderr]    Migrating tasks/read-a-file-line-by-line/src/main.rs from 2015 edition to 2018
[INFO] [stderr]    Migrating tasks/averages/mean-angle/src/bin/main.rs from 2015 edition to 2018
[INFO] [stderr]     Checking hailstone-sequence v0.1.0 (/tmp/fixit/tasks/hailstone-sequence)
[INFO] [stderr]    Migrating tasks/hailstone-sequence/src/main.rs from 2015 edition to 2018
[INFO] [stderr]     Checking zumkeller-numbers v0.1.0 (/tmp/fixit/tasks/zumkeller-numbers)
[INFO] [stderr]    Migrating tasks/zumkeller-numbers/src/main.rs from 2018 edition to 2021
[INFO] [stderr]     Checking abundant-deficient-and-perfect-number-classifications v0.1.0 (/tmp/fixit/tasks/abundant-deficient-and-perfect-number-classifications)
[INFO] [stderr]    Migrating tasks/abundant-deficient-and-perfect-number-classifications/src/main.rs from 2015 edition to 2018
[INFO] [stderr]     Checking jortsort v0.1.0 (/tmp/fixit/tasks/jortsort)
[INFO] [stderr]    Migrating tasks/jortsort/src/main.rs from 2015 edition to 2018
[INFO] [stderr]     Checking greatest-element-of-a-list v0.1.0 (/tmp/fixit/tasks/greatest-element-of-a-list)
[INFO] [stderr]    Migrating tasks/greatest-element-of-a-list/src/main.rs from 2015 edition to 2018
[INFO] [stderr]     Checking comments v0.1.0 (/tmp/fixit/tasks/comments)
[INFO] [stderr]    Migrating tasks/comments/src/main.rs from 2015 edition to 2018
[INFO] [stderr]     Checking magic-squares-of-odd-order v0.1.0 (/tmp/fixit/tasks/magic-squares-of-odd-order)
[INFO] [stderr]    Migrating tasks/magic-squares-of-odd-order/src/main.rs from 2015 edition to 2018
[INFO] [stderr]     Checking vigenere-cipher v0.1.0 (/tmp/fixit/tasks/vigenere-cipher)
[INFO] [stderr]    Migrating tasks/vigenere-cipher/src/main.rs from 2015 edition to 2018
[INFO] [stderr]     Checking lzw-compression v0.1.0 (/tmp/fixit/tasks/lzw-compression)
[INFO] [stderr]    Migrating tasks/lzw-compression/src/main.rs from 2015 edition to 2018
[INFO] [stderr]     Checking currying v0.1.0 (/tmp/fixit/tasks/currying)
[INFO] [stderr]    Migrating tasks/currying/src/main.rs from 2015 edition to 2018
[INFO] [stderr]     Checking top-and-tail v0.1.0 (/tmp/fixit/tasks/strip-whitespace-from-a-string/top-and-tail)
[INFO] [stderr]    Migrating tasks/strip-whitespace-from-a-string/top-and-tail/src/main.rs from 2015 edition to 2018
[INFO] [stderr]     Checking alignment v0.1.0 (/tmp/fixit/tasks/levenshtein-distance/alignment)
[INFO] [stderr]    Migrating tasks/levenshtein-distance/alignment/src/main.rs from 2015 edition to 2018
[INFO] [stderr]     Checking i-before-e-except-after-c v0.1.0 (/tmp/fixit/tasks/i-before-e-except-after-c)
[INFO] [stderr]    Migrating tasks/i-before-e-except-after-c/src/main.rs from 2015 edition to 2018
[INFO] [stderr]     Checking square-free-integers v0.1.0 (/tmp/fixit/tasks/square-free-integers)
[INFO] [stderr]     Checking read-a-specific-line-from-a-file v0.1.0 (/tmp/fixit/tasks/read-a-specific-line-from-a-file)
[INFO] [stderr]    Migrating tasks/square-free-integers/src/main.rs from 2015 edition to 2018
[INFO] [stderr]    Migrating tasks/read-a-specific-line-from-a-file/src/main.rs from 2015 edition to 2018
[INFO] [stderr]     Checking padovan-n-step-number-sequences v0.1.0 (/tmp/fixit/tasks/padovan-n-step-number-sequences)
[INFO] [stderr]    Migrating tasks/padovan-n-step-number-sequences/src/main.rs from 2018 edition to 2021
[INFO] [stderr]     Checking crc-32 v0.1.0 (/tmp/fixit/tasks/crc-32)
[INFO] [stderr]    Migrating tasks/crc-32/src/main.rs from 2015 edition to 2018
[INFO] [stderr]     Checking almost-prime v0.1.0 (/tmp/fixit/tasks/almost-prime)
[INFO] [stderr]    Migrating tasks/almost-prime/src/main.rs from 2015 edition to 2018
[INFO] [stderr]     Checking host-introspection v0.1.0 (/tmp/fixit/tasks/host-introspection)
[INFO] [stderr]    Migrating tasks/host-introspection/src/main.rs from 2015 edition to 2018
[INFO] [stderr]     Checking doubly-linked-list-element-insertion v0.1.0 (/tmp/fixit/tasks/doubly-linked-list/element-insertion)
[INFO] [stderr]    Migrating tasks/doubly-linked-list/element-insertion/src/main.rs from 2015 edition to 2018
[INFO] [stderr]     Checking selection-sort v0.1.0 (/tmp/fixit/tasks/sorting-algorithms/selection-sort)
[INFO] [stderr]     Checking array-concatenation v0.1.0 (/tmp/fixit/tasks/array-concatenation)
[INFO] [stderr]    Migrating tasks/sorting-algorithms/selection-sort/src/main.rs from 2015 edition to 2018
[INFO] [stderr]    Migrating tasks/array-concatenation/src/main.rs from 2015 edition to 2018
[INFO] [stderr]     Checking line-printer v0.1.0 (/tmp/fixit/tasks/hello-world/line-printer)
[INFO] [stderr]     Checking hofstadter-conway v0.1.0 (/tmp/fixit/tasks/hofstadter-conway)
[INFO] [stderr]    Migrating tasks/hello-world/line-printer/src/main.rs from 2015 edition to 2018
[INFO] [stderr]    Migrating tasks/hofstadter-conway/src/main.rs from 2018 edition to 2021
[INFO] [stderr]     Checking mutual-recursion v0.1.0 (/tmp/fixit/tasks/mutual-recursion)
[INFO] [stderr]    Migrating tasks/mutual-recursion/src/main.rs from 2015 edition to 2018
[INFO] [stdout] warning: the feature `non_ascii_idents` has been stable since 1.53.0 and no longer requires an attribute to enable
[INFO] [stdout]  --> tasks/unicode-variable-names/src/main.rs:1:12
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(non_ascii_idents)]
[INFO] [stdout]   |            ^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(stable_features)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Checking chinese-remainder-theorem v0.1.0 (/tmp/fixit/tasks/chinese-remainder-theorem)
[INFO] [stderr]    Migrating tasks/chinese-remainder-theorem/src/main.rs from 2015 edition to 2018
[INFO] [stderr]     Checking soundex v0.1.0 (/tmp/fixit/tasks/soundex)
[INFO] [stderr]    Migrating tasks/soundex/src/lib.rs from 2018 edition to 2021
[INFO] [stderr]     Checking environment-variables v0.1.0 (/tmp/fixit/tasks/environment-variables)
[INFO] [stderr]    Migrating tasks/environment-variables/src/main.rs from 2015 edition to 2018
[INFO] [stderr]     Checking n-plus-one-half v0.1.0 (/tmp/fixit/tasks/loops/n-plus-one-half)
[INFO] [stderr]    Migrating tasks/loops/n-plus-one-half/src/main.rs from 2015 edition to 2018
[INFO] [stderr]     Checking fork v0.1.0 (/tmp/fixit/tasks/fork)
[INFO] [stderr]    Migrating tasks/fork/src/main.rs from 2015 edition to 2018
[INFO] [stderr]     Checking towers-of-hanoi v0.1.0 (/tmp/fixit/tasks/towers-of-hanoi)
[INFO] [stderr]    Migrating tasks/towers-of-hanoi/src/main.rs from 2015 edition to 2018
[INFO] [stderr]     Checking insertion-sort v0.1.0 (/tmp/fixit/tasks/sorting-algorithms/insertion-sort)
[INFO] [stderr]    Migrating tasks/sorting-algorithms/insertion-sort/src/main.rs from 2015 edition to 2018
[INFO] [stderr]     Checking _0-1 v0.1.0 (/tmp/fixit/tasks/knapsack-problem/_0-1)
[INFO] [stderr]    Migrating tasks/knapsack-problem/_0-1/src/main.rs from 2015 edition to 2018
[INFO] [stderr]     Checking strip-comments-from-a-string v0.1.0 (/tmp/fixit/tasks/strip-comments-from-a-string)
[INFO] [stderr]    Migrating tasks/strip-comments-from-a-string/src/main.rs from 2015 edition to 2018
[INFO] [stderr]     Checking return-multiple-values v0.1.0 (/tmp/fixit/tasks/return-multiple-values)
[INFO] [stderr]    Migrating tasks/return-multiple-values/src/main.rs from 2015 edition to 2018
[INFO] [stderr]     Checking moving-average v0.1.0 (/tmp/fixit/tasks/averages/simple-moving-average)
[INFO] [stderr]    Migrating tasks/averages/simple-moving-average/src/main.rs from 2015 edition to 2018
[INFO] [stderr]     Checking harshad-or-niven-series v0.1.0 (/tmp/fixit/tasks/harshad-or-niven-series)
[INFO] [stderr]    Migrating tasks/harshad-or-niven-series/src/main.rs from 2015 edition to 2018
[INFO] [stderr]     Checking obtain-a-y-or-n-response v0.1.0 (/tmp/fixit/tasks/keyboard-input/obtain-a-y-or-n-response)
[INFO] [stderr]    Migrating tasks/keyboard-input/obtain-a-y-or-n-response/src/main.rs from 2015 edition to 2018
[INFO] [stderr]     Checking md4 v0.1.0 (/tmp/fixit/tasks/md4)
[INFO] [stderr]    Migrating tasks/md4/src/main.rs from 2015 edition to 2018
[INFO] [stderr]     Checking sedols v0.1.0 (/tmp/fixit/tasks/sedols)
[INFO] [stderr]    Migrating tasks/sedols/src/main.rs from 2018 edition to 2021
[INFO] [stderr]     Checking narcissistic-decimal-number v0.1.0 (/tmp/fixit/tasks/narcissistic-decimal-number)
[INFO] [stderr]    Migrating tasks/narcissistic-decimal-number/src/main.rs from 2018 edition to 2021
[INFO] [stderr]     Checking thieles-interpolation-formula v0.1.0 (/tmp/fixit/tasks/thieles-interpolation-formula)
[INFO] [stderr]    Migrating tasks/thieles-interpolation-formula/src/main.rs from 2015 edition to 2018
[INFO] [stderr]     Checking aliquot-sequence-classifications v0.1.0 (/tmp/fixit/tasks/aliquot-sequence-classifications)
[INFO] [stderr]    Migrating tasks/aliquot-sequence-classifications/src/main.rs from 2015 edition to 2018
[INFO] [stderr]        Fixed tasks/ulam-spiral-for-primes/src/main.rs (1 fix)
[INFO] [stderr]     Checking tokenize-a-string v0.1.0 (/tmp/fixit/tasks/tokenize-a-string)
[INFO] [stderr]    Migrating tasks/tokenize-a-string/src/main.rs from 2015 edition to 2018
[INFO] [stderr]     Checking infinite v0.1.0 (/tmp/fixit/tasks/loops/infinite)
[INFO] [stderr]    Migrating tasks/loops/infinite/src/main.rs from 2015 edition to 2018
[INFO] [stderr]     Checking case-sensitivity-of-identifiers v0.1.0 (/tmp/fixit/tasks/case-sensitivity-of-identifiers)
[INFO] [stderr]    Migrating tasks/case-sensitivity-of-identifiers/src/main.rs from 2015 edition to 2018
[INFO] [stderr]     Checking letter-frequency v0.1.0 (/tmp/fixit/tasks/letter-frequency)
[INFO] [stderr]    Migrating tasks/letter-frequency/src/main.rs from 2015 edition to 2018
[INFO] [stderr]     Checking vigenere-cipher-cryptanalysis v0.1.0 (/tmp/fixit/tasks/vigenere-cipher-cryptanalysis)
[INFO] [stderr]    Migrating tasks/vigenere-cipher-cryptanalysis/src/main.rs from 2015 edition to 2018
[INFO] [stderr]     Checking horizontal-sundial-calculations v0.1.0 (/tmp/fixit/tasks/horizontal-sundial-calculations)
[INFO] [stderr]    Migrating tasks/horizontal-sundial-calculations/src/main.rs from 2018 edition to 2021
[INFO] [stderr]     Checking element-insertion v0.1.0 (/tmp/fixit/tasks/singly-linked-list/element-insertion)
[INFO] [stderr]    Migrating tasks/singly-linked-list/element-insertion/src/main.rs from 2015 edition to 2018
[INFO] [stderr]     Checking assertions v0.1.0 (/tmp/fixit/tasks/assertions)
[INFO] [stderr]    Migrating tasks/assertions/src/main.rs from 2015 edition to 2018
[INFO] [stderr]     Checking execute-hq9-plus v0.1.0 (/tmp/fixit/tasks/execute-hq9-plus)
[INFO] [stderr]    Migrating tasks/execute-hq9-plus/src/main.rs from 2015 edition to 2018
[INFO] [stderr]     Checking dns-query v0.1.0 (/tmp/fixit/tasks/dns-query)
[INFO] [stderr]    Migrating tasks/dns-query/src/main.rs from 2015 edition to 2018
[INFO] [stderr]     Checking cheryl-birthday v0.1.0 (/tmp/fixit/tasks/cheryl-birthday)
[INFO] [stderr]    Migrating tasks/cheryl-birthday/src/main.rs from 2018 edition to 2021
[INFO] [stderr]     Checking wireworld v0.1.0 (/tmp/fixit/tasks/wireworld)
[INFO] [stderr]    Migrating tasks/wireworld/src/main.rs from 2015 edition to 2018
[INFO] [stderr]     Checking price-fraction v0.1.0 (/tmp/fixit/tasks/price-fraction)
[INFO] [stderr]    Migrating tasks/price-fraction/src/main.rs from 2015 edition to 2018
[INFO] [stderr]     Checking standard-deviation v0.1.0 (/tmp/fixit/tasks/standard-deviation)
[INFO] [stderr]    Migrating tasks/standard-deviation/src/main.rs from 2015 edition to 2018
[INFO] [stderr]     Checking topological-sort v0.1.0 (/tmp/fixit/tasks/sorting-algorithms/topological-sort)
[INFO] [stderr]    Migrating tasks/sorting-algorithms/topological-sort/src/main.rs from 2018 edition to 2021
[INFO] [stderr]     Checking string-length v0.1.0 (/tmp/fixit/tasks/string-length)
[INFO] [stderr]    Migrating tasks/string-length/src/main.rs from 2015 edition to 2018
[INFO] [stderr]     Checking digital-root v0.1.0 (/tmp/fixit/tasks/digital-root)
[INFO] [stderr]    Migrating tasks/digital-root/src/main.rs from 2015 edition to 2018
[INFO] [stderr]     Checking address-of-a-variable v0.1.0 (/tmp/fixit/tasks/address-of-a-variable)
[INFO] [stderr]    Migrating tasks/address-of-a-variable/src/main.rs from 2015 edition to 2018
[INFO] [stderr]     Checking amicable-pairs v0.1.0 (/tmp/fixit/tasks/amicable-pairs)
[INFO] [stderr]    Migrating tasks/amicable-pairs/src/main.rs from 2015 edition to 2018
[INFO] [stderr]     Checking function-definition v0.1.0 (/tmp/fixit/tasks/function-definition)
[INFO] [stderr]    Migrating tasks/function-definition/src/main.rs from 2015 edition to 2018
[INFO] [stderr]     Checking enumerations v0.1.0 (/tmp/fixit/tasks/enumerations)
[INFO] [stderr]    Migrating tasks/enumerations/src/main.rs from 2015 edition to 2018
[INFO] [stderr]     Checking stooge-sort v0.1.0 (/tmp/fixit/tasks/sorting-algorithms/stooge-sort)
[INFO] [stderr]    Migrating tasks/sorting-algorithms/stooge-sort/src/main.rs from 2015 edition to 2018
[INFO] [stderr]     Checking sort-an-array-of-composite-structures v0.1.0 (/tmp/fixit/tasks/sort-an-array-of-composite-structures)
[INFO] [stderr]    Migrating tasks/sort-an-array-of-composite-structures/src/main.rs from 2015 edition to 2018
[INFO] [stderr]     Checking integer-comparison v0.1.0 (/tmp/fixit/tasks/integer-comparison)
[INFO] [stderr]    Migrating tasks/integer-comparison/src/main.rs from 2015 edition to 2018
[INFO] [stderr]     Checking sum-and-product-of-an-array v0.1.0 (/tmp/fixit/tasks/sum-and-product-of-an-array)
[INFO] [stderr]    Migrating tasks/sum-and-product-of-an-array/src/main.rs from 2015 edition to 2018
[INFO] [stderr]     Checking map-range v0.1.0 (/tmp/fixit/tasks/map-range)
[INFO] [stderr]    Migrating tasks/map-range/src/main.rs from 2015 edition to 2018
[INFO] [stderr]     Checking fibonacci-sequence v0.1.0 (/tmp/fixit/tasks/fibonacci-sequence)
[INFO] [stderr]    Migrating tasks/fibonacci-sequence/src/main.rs from 2015 edition to 2018
[INFO] [stderr]     Checking temperature-conversion v0.1.0 (/tmp/fixit/tasks/temperature-conversion)
[INFO] [stderr]    Migrating tasks/temperature-conversion/src/main.rs from 2015 edition to 2018
[INFO] [stderr]     Checking file-size v0.1.0 (/tmp/fixit/tasks/file-size)
[INFO] [stderr]    Migrating tasks/file-size/src/main.rs from 2015 edition to 2018
[INFO] [stderr]     Checking formatted-numeric-output v0.1.0 (/tmp/fixit/tasks/formatted-numeric-output)
[INFO] [stderr]    Migrating tasks/formatted-numeric-output/src/main.rs from 2015 edition to 2018
[INFO] [stderr]     Checking binary-search v0.1.0 (/tmp/fixit/tasks/binary-search)
[INFO] [stderr]    Migrating tasks/binary-search/src/main.rs from 2015 edition to 2018
[INFO] [stderr]     Checking infinity v0.1.0 (/tmp/fixit/tasks/infinity)
[INFO] [stderr]    Migrating tasks/infinity/src/main.rs from 2015 edition to 2018
[INFO] [stderr]     Checking quicksort v0.1.0 (/tmp/fixit/tasks/sorting-algorithms/quicksort)
[INFO] [stderr]    Migrating tasks/sorting-algorithms/quicksort/src/main.rs from 2015 edition to 2018
[INFO] [stderr]     Checking primality-by-trial-division v0.1.0 (/tmp/fixit/tasks/primality-by-trial-division)
[INFO] [stderr]    Migrating tasks/primality-by-trial-division/src/main.rs from 2015 edition to 2018
[INFO] [stderr]     Checking ethiopian-multiplication v0.1.0 (/tmp/fixit/tasks/ethiopian-multiplication)
[INFO] [stderr]    Migrating tasks/ethiopian-multiplication/src/main.rs from 2015 edition to 2018
[INFO] [stderr]     Checking set v0.1.0 (/tmp/fixit/tasks/set)
[INFO] [stderr]    Migrating tasks/set/src/main.rs from 2015 edition to 2018
[INFO] [stderr]     Checking generate-chess960-starting-position v0.1.0 (/tmp/fixit/tasks/generate-chess960-starting-position)
[INFO] [stderr]    Migrating tasks/generate-chess960-starting-position/src/main.rs from 2015 edition to 2018
[INFO] [stderr]     Checking implementation v0.1.0 (/tmp/fixit/tasks/md5/implementation)
[INFO] [stderr]    Migrating tasks/md5/implementation/src/main.rs from 2015 edition to 2018
[INFO] [stderr]     Checking substring-top-and-tail v0.1.0 (/tmp/fixit/tasks/substring/top-and-tail)
[INFO] [stderr]    Migrating tasks/substring/top-and-tail/src/main.rs from 2015 edition to 2018
[INFO] [stderr]     Checking count-in-octal v0.1.0 (/tmp/fixit/tasks/count-in-octal)
[INFO] [stderr]    Migrating tasks/count-in-octal/src/main.rs from 2015 edition to 2018
[INFO] [stderr]     Checking sleep v0.1.0 (/tmp/fixit/tasks/sleep)
[INFO] [stderr]    Migrating tasks/sleep/src/main.rs from 2015 edition to 2018
[INFO] [stderr]     Checking happy-numbers v0.1.0 (/tmp/fixit/tasks/happy-numbers)
[INFO] [stderr]    Migrating tasks/happy-numbers/src/main.rs from 2015 edition to 2018
[INFO] [stderr]     Checking read-entire-file v0.1.0 (/tmp/fixit/tasks/read-entire-file)
[INFO] [stderr]    Migrating tasks/read-entire-file/src/main.rs from 2015 edition to 2018
[INFO] [stderr]     Checking boolean-values v0.1.0 (/tmp/fixit/tasks/boolean-values)
[INFO] [stderr]    Migrating tasks/boolean-values/src/main.rs from 2015 edition to 2018
[INFO] [stderr]     Checking definition v0.1.0 (/tmp/fixit/tasks/queue/definition)
[INFO] [stderr]    Migrating tasks/queue/definition/src/main.rs from 2015 edition to 2018
[INFO] [stderr]     Checking huffman-coding v0.1.0 (/tmp/fixit/tasks/huffman-coding)
[INFO] [stderr]    Migrating tasks/huffman-coding/src/main.rs from 2015 edition to 2018
[INFO] [stderr]     Checking tau-number v0.1.0 (/tmp/fixit/tasks/tau-number)
[INFO] [stderr]    Migrating tasks/tau-number/src/main.rs from 2018 edition to 2021
[INFO] [stderr]     Checking perfect-numbers v0.1.0 (/tmp/fixit/tasks/perfect-numbers)
[INFO] [stderr]    Migrating tasks/perfect-numbers/src/main.rs from 2015 edition to 2018
[INFO] [stderr]     Checking newbie v0.1.0 (/tmp/fixit/tasks/hello-world/newbie)
[INFO] [stderr]    Migrating tasks/hello-world/newbie/src/main.rs from 2015 edition to 2018
[INFO] [stderr]     Checking menu v0.1.0 (/tmp/fixit/tasks/menu)
[INFO] [stderr]    Migrating tasks/menu/src/main.rs from 2015 edition to 2018
[INFO] [stderr]     Checking string-concatenation v0.1.0 (/tmp/fixit/tasks/string-concatenation)
[INFO] [stderr]    Migrating tasks/string-concatenation/src/main.rs from 2015 edition to 2018
[INFO] [stderr]     Checking power-set v0.1.0 (/tmp/fixit/tasks/power-set)
[INFO] [stderr]     Checking optional-parameters v0.1.0 (/tmp/fixit/tasks/optional-parameters)
[INFO] [stderr]    Migrating tasks/power-set/src/main.rs from 2015 edition to 2018
[INFO] [stderr]    Migrating tasks/optional-parameters/src/lib.rs from 2018 edition to 2021
[INFO] [stderr]     Checking move-to-front v0.1.0 (/tmp/fixit/tasks/move-to-front)
[INFO] [stderr]    Migrating tasks/move-to-front/src/main.rs from 2018 edition to 2021
[INFO] [stdout] warning: trailing semicolon in macro used in expression position
[INFO] [stdout]    --> tasks/tree-traversal/src/main.rs:192:49
[INFO] [stdout]     |
[INFO] [stdout] 192 |             $x.iter().map(|n| n.value).collect();
[INFO] [stdout]     |                                                 ^
[INFO] [stdout] ...
[INFO] [stdout] 212 |         res = trav_values!(root.traverse(&TraversalMethod::PreOrder));
[INFO] [stdout]     |               ------------------------------------------------------- in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(semicolon_in_expressions_from_macros)]` on by default
[INFO] [stdout]     = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in a future release!
[INFO] [stdout]     = note: for more information, see issue #79813 <https://github.com/rust-lang/rust/issues/79813>
[INFO] [stdout]     = note: this warning originates in the macro `trav_values` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trailing semicolon in macro used in expression position
[INFO] [stdout]    --> tasks/tree-traversal/src/main.rs:192:49
[INFO] [stdout]     |
[INFO] [stdout] 192 |             $x.iter().map(|n| n.value).collect();
[INFO] [stdout]     |                                                 ^
[INFO] [stdout] ...
[INFO] [stdout] 214 |         res = trav_values!(root.traverse(&TraversalMethod::InOrder));
[INFO] [stdout]     |               ------------------------------------------------------ in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in a future release!
[INFO] [stdout]     = note: for more information, see issue #79813 <https://github.com/rust-lang/rust/issues/79813>
[INFO] [stdout]     = note: this warning originates in the macro `trav_values` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trailing semicolon in macro used in expression position
[INFO] [stdout]    --> tasks/tree-traversal/src/main.rs:192:49
[INFO] [stdout]     |
[INFO] [stdout] 192 |             $x.iter().map(|n| n.value).collect();
[INFO] [stdout]     |                                                 ^
[INFO] [stdout] ...
[INFO] [stdout] 216 |         res = trav_values!(root.traverse(&TraversalMethod::PostOrder));
[INFO] [stdout]     |               -------------------------------------------------------- in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in a future release!
[INFO] [stdout]     = note: for more information, see issue #79813 <https://github.com/rust-lang/rust/issues/79813>
[INFO] [stdout]     = note: this warning originates in the macro `trav_values` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trailing semicolon in macro used in expression position
[INFO] [stdout]    --> tasks/tree-traversal/src/main.rs:192:49
[INFO] [stdout]     |
[INFO] [stdout] 192 |             $x.iter().map(|n| n.value).collect();
[INFO] [stdout]     |                                                 ^
[INFO] [stdout] ...
[INFO] [stdout] 218 |         res = trav_values!(root.traverse(&TraversalMethod::LevelOrder));
[INFO] [stdout]     |               --------------------------------------------------------- in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in a future release!
[INFO] [stdout]     = note: for more information, see issue #79813 <https://github.com/rust-lang/rust/issues/79813>
[INFO] [stdout]     = note: this warning originates in the macro `trav_values` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 4 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Checking circles-of-given-radius-through-two-points v0.1.0 (/tmp/fixit/tasks/circles-of-given-radius-through-two-points)
[INFO] [stderr]    Migrating tasks/circles-of-given-radius-through-two-points/src/main.rs from 2015 edition to 2018
[INFO] [stderr]    Migrating tasks/quine/tests/validate.rs from 2015 edition to 2018
[INFO] [stderr]     Checking value-capture v0.1.0 (/tmp/fixit/tasks/closures/value-capture)
[INFO] [stderr]    Migrating tasks/closures/value-capture/src/main.rs from 2015 edition to 2018
[INFO] [stderr]     Checking apply-a-callback-to-an-array v0.1.0 (/tmp/fixit/tasks/apply-a-callback-to-an-array)
[INFO] [stderr]    Migrating tasks/apply-a-callback-to-an-array/src/main.rs from 2015 edition to 2018
[INFO] [stderr]     Checking continue v0.1.0 (/tmp/fixit/tasks/loops/continue)
[INFO] [stderr]    Migrating tasks/loops/continue/src/main.rs from 2015 edition to 2018
[INFO] [stderr]     Checking jensens-device v0.1.0 (/tmp/fixit/tasks/jensens-device)
[INFO] [stderr]    Migrating tasks/jensens-device/src/main.rs from 2015 edition to 2018
[INFO] [stderr]     Checking middle-three-digits v0.1.0 (/tmp/fixit/tasks/middle-three-digits)
[INFO] [stderr]    Migrating tasks/middle-three-digits/src/main.rs from 2015 edition to 2018
[INFO] [stderr]     Checking string-interpolation-included v0.1.0 (/tmp/fixit/tasks/string-interpolation-included)
[INFO] [stderr]    Migrating tasks/string-interpolation-included/src/main.rs from 2015 edition to 2018
[INFO] [stderr]    Migrating tasks/combinations/src/bin/main.rs from 2015 edition to 2018
[INFO] [stderr]     Checking four-bit-adder v0.1.0 (/tmp/fixit/tasks/four-bit-adder)
[INFO] [stderr]    Migrating tasks/four-bit-adder/src/main.rs from 2015 edition to 2018
[INFO] [stderr]     Checking with-feedback-player v0.1.0 (/tmp/fixit/tasks/guess-the-number/with-feedback-player)
[INFO] [stderr]    Migrating tasks/guess-the-number/with-feedback-player/src/main.rs from 2015 edition to 2018
[INFO] [stderr]     Checking sierpinski-triangle v0.1.0 (/tmp/fixit/tasks/sierpinski-triangle)
[INFO] [stderr]    Migrating tasks/sierpinski-triangle/src/main.rs from 2018 edition to 2021
[INFO] [stderr]     Checking ludic-numbers v0.1.0 (/tmp/fixit/tasks/ludic-numbers)
[INFO] [stderr]    Migrating tasks/ludic-numbers/src/main.rs from 2015 edition to 2018
[INFO] [stderr]     Checking y-combinator v0.1.0 (/tmp/fixit/tasks/y-combinator)
[INFO] [stderr]    Migrating tasks/y-combinator/src/main.rs from 2015 edition to 2018
[INFO] [stderr]     Checking fibonacci-n-step-number-sequences v0.1.0 (/tmp/fixit/tasks/fibonacci-n-step-number-sequences)
[INFO] [stderr]    Migrating tasks/fibonacci-n-step-number-sequences/src/main.rs from 2015 edition to 2018
[INFO] [stderr]     Checking empty-directory v0.1.0 (/tmp/fixit/tasks/empty-directory)
[INFO] [stderr]    Migrating tasks/empty-directory/src/main.rs from 2015 edition to 2018
[INFO] [stderr]     Checking hash-join v0.1.0 (/tmp/fixit/tasks/hash-join)
[INFO] [stderr]    Migrating tasks/hash-join/src/main.rs from 2015 edition to 2018
[INFO] [stderr]     Checking merge-sort v0.1.0 (/tmp/fixit/tasks/sorting-algorithms/merge-sort)
[INFO] [stderr]    Migrating tasks/sorting-algorithms/merge-sort/src/main.rs from 2015 edition to 2018
[INFO] [stderr]     Checking arrays v0.1.0 (/tmp/fixit/tasks/arrays)
[INFO] [stderr]    Migrating tasks/arrays/src/main.rs from 2015 edition to 2018
[INFO] [stderr]     Checking conways-game-of-life v0.1.0 (/tmp/fixit/tasks/conways-game-of-life)
[INFO] [stderr]    Migrating tasks/conways-game-of-life/src/main.rs from 2015 edition to 2018
[INFO] [stderr]     Checking taxicab-numbers v0.1.0 (/tmp/fixit/tasks/taxicab-numbers)
[INFO] [stderr]    Migrating tasks/taxicab-numbers/src/main.rs from 2015 edition to 2018
[INFO] [stderr]     Checking comb-sort v0.1.0 (/tmp/fixit/tasks/sorting-algorithms/comb-sort)
[INFO] [stderr]    Migrating tasks/sorting-algorithms/comb-sort/src/main.rs from 2015 edition to 2018
[INFO] [stderr]     Checking while v0.1.0 (/tmp/fixit/tasks/loops/while)
[INFO] [stderr]    Migrating tasks/loops/while/src/main.rs from 2015 edition to 2018
[INFO] [stderr]     Checking array-length v0.1.0 (/tmp/fixit/tasks/array-length)
[INFO] [stderr]    Migrating tasks/array-length/src/main.rs from 2015 edition to 2018
[INFO] [stderr]     Checking stack v0.1.0 (/tmp/fixit/tasks/stack)
[INFO] [stderr]    Migrating tasks/stack/src/main.rs from 2015 edition to 2018
[INFO] [stderr]     Checking self-describing_numbers v0.1.0 (/tmp/fixit/tasks/self-describing-numbers)
[INFO] [stderr]    Migrating tasks/self-describing-numbers/src/main.rs from 2015 edition to 2018
[INFO] [stderr]     Checking p-value-correction v0.1.0 (/tmp/fixit/tasks/p-value-correction)
[INFO] [stderr]    Migrating tasks/p-value-correction/src/main.rs from 2018 edition to 2021
[INFO] [stderr]     Checking flatten-a-list v0.1.0 (/tmp/fixit/tasks/flatten-a-list)
[INFO] [stderr]    Migrating tasks/flatten-a-list/src/main.rs from 2015 edition to 2018
[INFO] [stderr]     Checking downward-for v0.1.0 (/tmp/fixit/tasks/loops/downward-for)
[INFO] [stderr]    Migrating tasks/loops/downward-for/src/main.rs from 2015 edition to 2018
[INFO] [stdout] warning: the feature `non_ascii_idents` has been stable since 1.53.0 and no longer requires an attribute to enable
[INFO] [stdout]  --> tasks/unicode-variable-names/src/main.rs:1:12
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(non_ascii_idents)]
[INFO] [stdout]   |            ^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(stable_features)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Checking general-fizzbuzz v0.1.0 (/tmp/fixit/tasks/general-fizzbuzz)
[INFO] [stderr]    Migrating tasks/general-fizzbuzz/src/main.rs from 2015 edition to 2018
[INFO] [stderr]     Checking catamorphism v0.1.0 (/tmp/fixit/tasks/catamorphism)
[INFO] [stderr]    Migrating tasks/catamorphism/src/main.rs from 2015 edition to 2018
[INFO] [stderr]     Checking empty-program v0.1.0 (/tmp/fixit/tasks/empty-program)
[INFO] [stderr]    Migrating tasks/empty-program/src/main.rs from 2015 edition to 2018
[INFO] [stderr]     Checking benfords-law v0.1.0 (/tmp/fixit/tasks/benfords-law)
[INFO] [stderr]    Migrating tasks/benfords-law/src/main.rs from 2015 edition to 2018
[INFO] [stderr]     Checking sequence-of-non-squares v0.1.0 (/tmp/fixit/tasks/sequence-of-non-squares)
[INFO] [stderr]    Migrating tasks/sequence-of-non-squares/src/main.rs from 2015 edition to 2018
[INFO] [stderr]     Checking events v0.1.0 (/tmp/fixit/tasks/events)
[INFO] [stderr]    Migrating tasks/events/src/main.rs from 2015 edition to 2018
[INFO] [stderr]     Checking truncate-a-file v0.1.0 (/tmp/fixit/tasks/truncate-a-file)
[INFO] [stderr]    Migrating tasks/truncate-a-file/src/main.rs from 2015 edition to 2018
[INFO] [stderr]     Checking gnome-sort v0.1.0 (/tmp/fixit/tasks/sorting-algorithms/gnome-sort)
[INFO] [stderr]    Migrating tasks/sorting-algorithms/gnome-sort/src/main.rs from 2015 edition to 2018
[INFO] [stderr]     Checking heapsort v0.1.0 (/tmp/fixit/tasks/sorting-algorithms/heapsort)
[INFO] [stderr]    Migrating tasks/sorting-algorithms/heapsort/src/main.rs from 2015 edition to 2018
[INFO] [stderr]     Checking arithmetic-mean v0.1.0 (/tmp/fixit/tasks/averages/arithmetic-mean)
[INFO] [stderr]    Migrating tasks/averages/arithmetic-mean/src/main.rs from 2015 edition to 2018
[INFO] [stderr]     Checking determine-if-only-one-instance-is-running v0.1.0 (/tmp/fixit/tasks/determine-if-only-one-instance-is-running)
[INFO] [stderr]    Migrating tasks/determine-if-only-one-instance-is-running/src/main.rs from 2015 edition to 2018
[INFO] [stderr]     Checking walkdir v2.3.1
[INFO] [stderr]     Checking libloading v0.6.7
[INFO] [stderr]     Checking instant v0.1.9
[INFO] [stderr]     Checking lock_api v0.3.4
[INFO] [stderr]     Checking lock_api v0.4.2
[INFO] [stderr]     Checking rand_core v0.3.1
[INFO] [stderr]     Checking xml-output v0.1.0 (/tmp/fixit/tasks/xml-output)
[INFO] [stderr]    Migrating tasks/xml-output/src/lib.rs from 2018 edition to 2021
[INFO] [stderr]     Checking thread_local v1.1.3
[INFO] [stderr]     Checking tracing-core v0.1.17
[INFO] [stderr]     Checking regex-automata v0.1.9
[INFO] [stderr]     Checking stb_truetype v0.3.1
[INFO] [stderr]     Checking bmp v0.5.0
[INFO] [stderr]     Checking foreign-types v0.3.2
[INFO] [stderr]     Checking futures-channel v0.3.13
[INFO] [stderr]     Checking matrixmultiply v0.2.4
[INFO] [stderr]     Checking matrixmultiply v0.3.1
[INFO] [stderr]     Checking tinyvec v1.1.1
[INFO] [stderr]     Checking unicode-bidi v0.3.4
[INFO] [stderr]     Checking form_urlencoded v1.0.1
[INFO] [stderr]     Checking textwrap v0.11.0
[INFO] [stderr]     Checking plotters-svg v0.3.0
[INFO] [stderr]     Checking http v0.2.3
[INFO] [stderr]    Compiling num-traits v0.2.14
[INFO] [stderr]    Compiling num-integer v0.1.44
[INFO] [stderr]    Compiling num-iter v0.1.42
[INFO] [stderr]    Compiling num-bigint v0.3.1
[INFO] [stderr]    Compiling num-rational v0.3.2
[INFO] [stderr]    Compiling indexmap v1.6.1
[INFO] [stderr]    Compiling crossbeam-utils v0.8.3
[INFO] [stderr]    Compiling memoffset v0.6.1
[INFO] [stderr]    Compiling rayon v1.5.0
[INFO] [stderr]    Compiling miniz_oxide v0.4.4
[INFO] [stderr]    Compiling num-complex v0.2.4
[INFO] [stderr]    Compiling num-bigint v0.2.6
[INFO] [stderr]    Compiling num-rational v0.2.4
[INFO] [stderr]    Compiling num-bigint v0.4.0
[INFO] [stderr]    Compiling crossbeam-utils v0.7.2
[INFO] [stderr]    Compiling num-rational v0.4.0
[INFO] [stderr]    Compiling memoffset v0.5.6
[INFO] [stderr]     Checking humantime v1.3.0
[INFO] [stderr]     Checking s-expressions v0.1.0 (/tmp/fixit/tasks/s-expressions)
[INFO] [stderr]    Migrating tasks/s-expressions/src/lib.rs from 2018 edition to 2021
[INFO] [stderr]     Checking predicates-tree v1.0.2
[INFO] [stderr]    Migrating tasks/aks-test-for-primes/src/main.rs from 2015 edition to 2018
[INFO] [stderr]     Checking arena-storage-pool v0.1.0 (/tmp/fixit/tasks/arena-storage-pool)
[INFO] [stderr]     Checking pernicious-numbers v0.1.0 (/tmp/fixit/tasks/pernicious-numbers)
[INFO] [stderr]    Migrating tasks/arena-storage-pool/src/main.rs from 2015 edition to 2018
[INFO] [stderr]     Checking block-padding v0.1.5
[INFO] [stderr]    Migrating tasks/pernicious-numbers/src/main.rs from 2015 edition to 2018
[INFO] [stderr]    Compiling heck v0.3.2
[INFO] [stderr]     Checking compile-time-calculation v0.1.0 (/tmp/fixit/tasks/compile-time-calculation)
[INFO] [stderr]    Compiling unicase v2.6.0
[INFO] [stderr]    Compiling proc-macro-error-attr v1.0.4
[INFO] [stderr]    Migrating tasks/compile-time-calculation/src/main.rs from 2018 edition to 2021
[INFO] [stderr]    Compiling error-chain v0.12.4
[INFO] [stderr]    Compiling proc-macro-error v1.0.4
[INFO] [stderr]    Compiling nom v6.1.2
[INFO] [stderr]    Compiling indoc v1.0.3
[INFO] [stderr]     Checking fibonacci-word v0.1.0 (/tmp/fixit/tasks/fibonacci-word)
[INFO] [stderr]    Migrating tasks/fibonacci-word/src/main.rs from 2015 edition to 2018
[INFO] [stderr]    Migrating tasks/entropy/src/main.rs from 2015 edition to 2018
[INFO] [stderr]     Checking deflate v0.7.20
[INFO] [stderr]     Checking inflate v0.4.5
[INFO] [stderr]     Checking look-and-say-sequence v0.1.0 (/tmp/fixit/tasks/look-and-say-sequence)
[INFO] [stderr]    Migrating tasks/run-length-encoding/src/main.rs from 2015 edition to 2018
[INFO] [stderr]    Compiling openssl-sys v0.9.60
[INFO] [stderr]    Migrating tasks/look-and-say-sequence/src/main.rs from 2015 edition to 2018
[INFO] [stderr]    Compiling ring v0.14.6
[INFO] [stderr]    Compiling libloading v0.5.2
[INFO] [stderr]    Compiling decimal v2.0.4
[INFO] [stderr]     Checking gif v0.10.3
[INFO] [stderr]     Checking cantor-set v0.1.0 (/tmp/fixit/tasks/cantor-set)
[INFO] [stderr]    Migrating tasks/cantor-set/src/main.rs from 2018 edition to 2021
[INFO] [stderr]     Checking brazilian-numbers v0.1.0 (/tmp/fixit/tasks/brazilian-numbers)
[INFO] [stderr]    Migrating tasks/brazilian-numbers/src/main.rs from 2018 edition to 2021
[INFO] [stderr]    Compiling kernel32-sys v0.2.2
[INFO] [stderr]     Checking reverse-a-string v0.1.0 (/tmp/fixit/tasks/reverse-a-string)
[INFO] [stderr]    Migrating tasks/reverse-a-string/src/main.rs from 2015 edition to 2018
[INFO] [stderr]     Checking term-painter v0.2.4
[INFO] [stderr]     Checking itertools v0.10.0
[INFO] [stderr]     Checking itertools v0.9.0
[INFO] [stderr]     Checking predicates v1.0.7
[INFO] [stderr]     Checking checkpoint-synchronization v0.1.0 (/tmp/fixit/tasks/checkpoint-synchronization)
[INFO] [stderr]    Migrating tasks/checkpoint-synchronization/src/main.rs from 2018 edition to 2021
[INFO] [stderr]    Migrating tasks/pangram-checker/src/bin/alternate.rs from 2018 edition to 2021
[INFO] [stderr]    Migrating tasks/pangram-checker/src/bin/main.rs from 2018 edition to 2021
[INFO] [stderr]     Checking addr2line v0.14.1
[INFO] [stderr]    Migrating tasks/n-queens-problem/src/main.rs from 2018 edition to 2021
[INFO] [stderr]     Checking validate-isin v0.1.0 (/tmp/fixit/tasks/validate-isin)
[INFO] [stderr]    Migrating tasks/validate-isin/src/lib.rs from 2018 edition to 2021
[INFO] [stderr]    Migrating tasks/prime-decomposition/src/main.rs from 2015 edition to 2018
[INFO] [stderr]        Fixed tasks/flatten-a-list/src/main.rs (1 fix)
[INFO] [stderr]     Checking dlib v0.4.2
[INFO] [stderr]    Migrating tasks/factorial/src/main.rs from 2018 edition to 2021
[INFO] [stderr]     Checking archimedean-spiral v0.1.0 (/tmp/fixit/tasks/archimedean-spiral)
[INFO] [stderr]    Migrating tasks/archimedean-spiral/src/main.rs from 2015 edition to 2018
[INFO] [stderr]     Checking unicode-normalization v0.1.17
[INFO] [stderr]     Checking http-body v0.3.1
[INFO] [stderr]    Migrating tasks/write-to-a-windows-event-log/src/main.rs from 2018 edition to 2021
[INFO] [stderr]     Checking wayland-sys v0.23.6
[INFO] [stderr]    Compiling aho-corasick v0.7.15
[INFO] [stderr]     Checking futures-util v0.3.13
[INFO] [stderr]     Checking csv-core v0.1.10
[INFO] [stderr]     Checking tracing v0.1.25
[INFO] [stderr]     Checking want v0.3.0
[INFO] [stderr]     Checking num_cpus v1.13.0
[INFO] [stderr]     Checking net2 v0.2.37
[INFO] [stderr]     Checking iovec v0.1.4
[INFO] [stderr]     Checking socket2 v0.3.19
[INFO] [stderr]     Checking atty v0.2.14
[INFO] [stderr]     Checking time v0.1.44
[INFO] [stderr]     Checking x11-dl v2.18.5
[INFO] [stderr]     Checking memmap v0.7.0
[INFO] [stderr]     Checking parking_lot_core v0.7.2
[INFO] [stderr]     Checking memchr v0.1.11
[INFO] [stderr]     Checking raw-window-handle v0.3.3
[INFO] [stderr]     Checking shared_library v0.1.9
[INFO] [stderr]     Checking parking_lot_core v0.8.3
[INFO] [stderr]     Checking mio v0.7.9
[INFO] [stderr]     Checking signal-hook-registry v1.3.0
[INFO] [stderr]     Checking rand v0.5.6
[INFO] [stderr]     Checking wait-timeout v0.2.0
[INFO] [stderr]     Checking handle-a-signal v0.1.0 (/tmp/fixit/tasks/handle-a-signal)
[INFO] [stderr]     Checking call-a-foreign-language-function v0.1.0 (/tmp/fixit/tasks/call-a-foreign-language-function)
[INFO] [stderr]    Migrating tasks/handle-a-signal/src/main.rs from 2018 edition to 2021
[INFO] [stderr]     Checking use-another-language-to-call-a-function v0.1.0 (/tmp/fixit/tasks/use-another-language-to-call-a-function)
[INFO] [stderr]    Migrating tasks/call-a-foreign-language-function/src/main.rs from 2015 edition to 2018
[INFO] [stderr]    Migrating tasks/use-another-language-to-call-a-function/src/lib.rs from 2015 edition to 2018
[INFO] [stderr]     Checking check-input-device-is-a-terminal v0.1.0 (/tmp/fixit/tasks/check-input-device-is-a-terminal)
[INFO] [stderr]     Checking machine-code v0.1.0 (/tmp/fixit/tasks/machine-code)
[INFO] [stderr]    Migrating tasks/check-input-device-is-a-terminal/src/main.rs from 2015 edition to 2018
[INFO] [stderr]    Migrating tasks/machine-code/src/main.rs from 2018 edition to 2021
[INFO] [stderr]     Checking check-output-device-is-a-terminal v0.1.0 (/tmp/fixit/tasks/check-output-device-is-a-terminal)
[INFO] [stderr]    Migrating tasks/check-output-device-is-a-terminal/src/main.rs from 2015 edition to 2018
[INFO] [stderr]     Checking kolakoski-sequence v0.1.0 (/tmp/fixit/tasks/kolakoski-sequence)
[INFO] [stderr]     Checking sequence-smallest-number-with-exactly-n-divisors v0.1.0 (/tmp/fixit/tasks/sequence-smallest-number-with-exactly-n-divisors)
[INFO] [stderr]    Migrating tasks/kolakoski-sequence/src/main.rs from 2018 edition to 2021
[INFO] [stderr]    Migrating tasks/sequence-smallest-number-with-exactly-n-divisors/src/main.rs from 2018 edition to 2021
[INFO] [stderr]     Checking ordered-partitions v0.1.0 (/tmp/fixit/tasks/ordered-partitions)
[INFO] [stderr]     Checking rare-numbers v0.1.0 (/tmp/fixit/tasks/rare-numbers)
[INFO] [stderr]    Migrating tasks/ordered-partitions/src/main.rs from 2018 edition to 2021
[INFO] [stderr]     Checking humble-numbers v0.1.0 (/tmp/fixit/tasks/humble-numbers)
[INFO] [stderr]    Migrating tasks/rare-numbers/src/main.rs from 2018 edition to 2021
[INFO] [stderr]    Migrating tasks/humble-numbers/src/main.rs from 2018 edition to 2021
[INFO] [stderr]     Checking topswops v0.1.0 (/tmp/fixit/tasks/topswops)
[INFO] [stderr]    Migrating tasks/topswops/src/main.rs from 2018 edition to 2021
[INFO] [stderr]    Compiling quote v1.0.9
[INFO] [stderr]    Compiling wayland-scanner v0.23.6
[INFO] [stderr]     Checking bitvec v0.19.5
[INFO] [stderr]    Compiling gl_generator v0.14.0
[INFO] [stderr]     Checking rand_core v0.5.1
[INFO] [stderr]     Checking clap v2.33.3
[INFO] [stderr]     Checking mio v0.6.23
[INFO] [stderr]     Checking aho-corasick v0.5.3
[INFO] [stderr]     Checking rand_core v0.6.2
[INFO] [stderr]     Checking osmesa-sys v0.1.2
[INFO] [stderr]     Checking system-time v0.1.0 (/tmp/fixit/tasks/system-time)
[INFO] [stderr]    Migrating tasks/system-time/src/main.rs from 2015 edition to 2018
[INFO] [stderr]     Checking parking_lot v0.10.2
[INFO] [stderr]     Checking parking_lot v0.11.1
[INFO] [stderr]     Checking signal-hook v0.1.17
[INFO] [stderr]     Checking generic-array v0.12.4
[INFO] [stderr]     Checking generic-array v0.13.3
[INFO] [stderr]     Checking generic-array v0.11.2
[INFO] [stderr]     Checking regex v1.4.3
[INFO] [stderr]     Checking idna v0.2.2
[INFO] [stderr]     Checking idna v0.1.5
[INFO] [stderr]     Checking crossbeam-channel v0.5.0
[INFO] [stderr]     Checking crossbeam-epoch v0.9.3
[INFO] [stderr]     Checking thread-id v2.0.0
[INFO] [stderr]     Checking crossbeam-channel v0.4.4
[INFO] [stderr]     Checking backtrace v0.3.56
[INFO] [stderr]    Compiling mime_guess v2.0.3
[INFO] [stderr]     Checking rand_chacha v0.2.2
[INFO] [stderr]     Checking rand_chacha v0.3.0
[INFO] [stderr]     Checking crossterm v0.19.0
[INFO] [stderr]     Checking block-buffer v0.7.3
[INFO] [stderr]     Checking digest v0.8.1
[INFO] [stderr]     Checking num-complex v0.3.1
[INFO] [stderr]     Checking approx v0.3.2
[INFO] [stderr]     Checking plotters v0.3.0
[INFO] [stderr]     Checking ordered-float v1.1.1
[INFO] [stderr]     Checking line_drawing v0.7.0
[INFO] [stderr] error: could not compile `nix`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustc --crate-name nix /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/nix-0.14.1/src/lib.rs --error-format=json --json=diagnostic-rendered-ansi --crate-type lib --emit=dep-info,metadata -C embed-bitcode=no -C debuginfo=2 -C metadata=fbc208c9a4f1736e -C extra-filename=-fbc208c9a4f1736e --out-dir /opt/rustwide/target/debug/deps -L dependency=/opt/rustwide/target/debug/deps --extern bitflags=/opt/rustwide/target/debug/deps/libbitflags-8cf43a02c2e23999.rmeta --extern cfg_if=/opt/rustwide/target/debug/deps/libcfg_if-d7aa02586377abc4.rmeta --extern libc=/opt/rustwide/target/debug/deps/liblibc-19a346f6bef8370f.rmeta --extern void=/opt/rustwide/target/debug/deps/libvoid-8d5221644b636eb9.rmeta --cap-lints allow --cap-lints=forbid` (signal: 9, SIGKILL: kill)
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: build failed
[INFO] [stderr] error: failed to migrate to next edition
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `cargo fix --edition --allow-no-vcs --allow-dirty --frozen --all --all-targets --message-format=json` (exit status: 101)
[INFO] running `Command { std: "docker" "inspect" "715b4704001073bdac010b47f3e9f04ec6021996152cfd787fd8cc7d610c0272", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "715b4704001073bdac010b47f3e9f04ec6021996152cfd787fd8cc7d610c0272", kill_on_drop: false }`
[INFO] [stdout] 715b4704001073bdac010b47f3e9f04ec6021996152cfd787fd8cc7d610c0272