malloc error on app boot

[Frexuz]

=> Booting Puma
=> Rails 5.1.1 application starting in development on http://0.0.0.0:3000
=> Run `rails server -h` for more startup options
ruby(47186,0x7fff961353c0) malloc: *** error for object 0x7f83e3a11bc0: pointer being freed was not allocated
*** set a breakpoint in malloc_error_break to debug

GEM
  remote: http://rubygems.org/
  specs:
    actioncable (5.1.1)
      actionpack (= 5.1.1)
      nio4r (~> 2.0)
      websocket-driver (~> 0.6.1)
    actionmailer (5.1.1)
      actionpack (= 5.1.1)
      actionview (= 5.1.1)
      activejob (= 5.1.1)
      mail (~> 2.5, >= 2.5.4)
      rails-dom-testing (~> 2.0)
    actionpack (5.1.1)
      actionview (= 5.1.1)
      activesupport (= 5.1.1)
      rack (~> 2.0)
      rack-test (~> 0.6.3)
      rails-dom-testing (~> 2.0)
      rails-html-sanitizer (~> 1.0, >= 1.0.2)
    actionview (5.1.1)
      activesupport (= 5.1.1)
      builder (~> 3.1)
      erubi (~> 1.4)
      rails-dom-testing (~> 2.0)
      rails-html-sanitizer (~> 1.0, >= 1.0.3)
    activeadmin (1.0.0)
      arbre (>= 1.1.1)
      bourbon
      coffee-rails
      formtastic (~> 3.1)
      formtastic_i18n
      inherited_resources (~> 1.7)
      jquery-rails
      jquery-ui-rails
      kaminari (>= 0.15, < 2.0)
      railties (>= 4.2, < 5.2)
      ransack (~> 1.3)
      sass-rails
      sprockets (< 4.1)
    activejob (5.1.1)
      activesupport (= 5.1.1)
      globalid (>= 0.3.6)
    activemodel (5.1.1)
      activesupport (= 5.1.1)
    activerecord (5.1.1)
      activemodel (= 5.1.1)
      activesupport (= 5.1.1)
      arel (~> 8.0)
    activerecord-import (0.18.3)
      activerecord (>= 3.2)
    activesupport (5.1.1)
      concurrent-ruby (~> 1.0, >= 1.0.2)
      i18n (~> 0.7)
      minitest (~> 5.1)
      tzinfo (~> 1.1)
    addressable (2.5.1)
      public_suffix (~> 2.0, >= 2.0.2)
    annotate (2.7.2)
      activerecord (>= 3.2, < 6.0)
      rake (>= 10.4, < 13.0)
    arbre (1.1.1)
      activesupport (>= 3.0.0)
    arel (8.0.0)
    ast (2.3.0)
    autoprefixer-rails (7.1.1)
      execjs
    awesome_print (1.7.0)
    axiom-types (0.1.1)
      descendants_tracker (~> 0.0.4)
      ice_nine (~> 0.11.0)
      thread_safe (~> 0.3, >= 0.3.1)
    bcrypt (3.1.11)
    better_errors (2.1.1)
      coderay (>= 1.0.0)
      erubis (>= 2.6.6)
      rack (>= 0.9.0)
    bindex (0.5.0)
    binding_of_caller (0.7.2)
      debug_inspector (>= 0.0.1)
    bourbon (4.3.4)
      sass (~> 3.4)
      thor (~> 0.19)
    braintree (2.76.0)
      builder (>= 2.0.0)
    brakeman (3.6.2)
    builder (3.2.3)
    bullet (5.5.1)
      activesupport (>= 3.0.0)
      uniform_notifier (~> 1.10.0)
    byebug (9.0.6)
    capybara (2.14.0)
      addressable
      mime-types (>= 1.16)
      nokogiri (>= 1.3.3)
      rack (>= 1.0.0)
      rack-test (>= 0.5.4)
      xpath (~> 2.0)
    climate_control (0.2.0)
    cocaine (0.5.8)
      climate_control (>= 0.0.3, < 1.0)
    cocoon (1.2.10)
    codeclimate-engine-rb (0.4.0)
      virtus (~> 1.0)
    coderay (1.1.1)
    coercible (1.0.0)
      descendants_tracker (~> 0.0.1)
    coffee-rails (4.2.2)
      coffee-script (>= 2.2.0)
      railties (>= 4.0.0)
    coffee-script (2.4.1)
      coffee-script-source
      execjs
    coffee-script-source (1.12.2)
    concurrent-ruby (1.0.5)
    connection_pool (2.2.1)
    contentful (0.12.0)
      http (~> 1.0)
      json (~> 1.8)
      multi_json (~> 1)
    contentful-management (1.8.0)
      http (> 1.0, < 3.0)
      json (~> 1.8)
      multi_json (~> 1)
    contentful_model (0.2.0)
      activesupport
      contentful (~> 0.9)
      contentful-management (~> 1.0)
      redcarpet
      require_all
    dalli (2.7.6)
    database_cleaner (1.6.1)
    debug_inspector (0.0.3)
    descendants_tracker (0.0.4)
      thread_safe (~> 0.3, >= 0.3.1)
    devise (4.3.0)
      bcrypt (~> 3.0)
      orm_adapter (~> 0.1)
      railties (>= 4.1.0, < 5.2)
      responders
      warden (~> 1.2.3)
    diff-lcs (1.3)
    docile (1.1.5)
    domain_name (0.5.20170404)
      unf (>= 0.0.5, < 1.0.0)
    em-websocket (0.5.1)
      eventmachine (>= 0.12.9)
      http_parser.rb (~> 0.6.0)
    equalizer (0.0.11)
    erubi (1.6.0)
    erubis (2.7.0)
    et-orbi (1.0.4)
      tzinfo
    eventmachine (1.2.3)
    execjs (2.7.0)
    factory_girl (4.8.0)
      activesupport (>= 3.0.0)
    factory_girl_rails (4.8.0)
      factory_girl (~> 4.8.0)
      railties (>= 3.0.0)
    faraday (0.11.0)
      multipart-post (>= 1.2, < 3)
    ffaker (2.5.0)
    ffi (1.9.18)
    formatador (0.2.5)
    formtastic (3.1.5)
      actionpack (>= 3.2.13)
    formtastic_i18n (0.6.0)
    fuubar (2.2.0)
      rspec-core (~> 3.0)
      ruby-progressbar (~> 1.4)
    gem-shut-the-fuck-up (1.0.0)
    global (0.2.1)
      activesupport (>= 2.0)
    globalid (0.4.0)
      activesupport (>= 4.2.0)
    guard (2.14.1)
      formatador (>= 0.2.4)
      listen (>= 2.7, < 4.0)
      lumberjack (~> 1.0)
      nenv (~> 0.1)
      notiffany (~> 0.0)
      pry (>= 0.9.12)
      shellany (~> 0.0)
      thor (>= 0.18.1)
    guard-annotate (2.3)
      annotate (~> 2.4, >= 2.4.0)
      guard-compat (~> 1.2, >= 1.2.1)
    guard-brakeman (0.8.3)
      brakeman (>= 2.1.1)
      guard (>= 2.0.0)
    guard-bundler (2.1.0)
      bundler (~> 1.0)
      guard (~> 2.2)
      guard-compat (~> 1.1)
    guard-compat (1.2.1)
    guard-jshintrb (1.1.1)
      guard (~> 2.0)
      jshintrb
    guard-livereload (2.5.2)
      em-websocket (~> 0.5)
      guard (~> 2.8)
      guard-compat (~> 1.0)
      multi_json (~> 1.8)
    guard-reek (1.1.0)
      guard-compat (~> 1.1)
      reek
    guard-rspec (4.7.3)
      guard (~> 2.1)
      guard-compat (~> 1.1)
      rspec (>= 2.99.0, < 4.0)
    guard-rubocop (1.2.0)
      guard (~> 2.0)
      rubocop (~> 0.20)
    guard-scss_lint (0.1.5)
      guard-compat (~> 1.1)
      scss_lint (~> 0.50)
    guard-yamlsort (0.0.2)
      guard-compat (~> 1.1)
    has_permalink (0.1.7)
    has_scope (0.7.1)
      actionpack (>= 4.1, < 5.2)
      activesupport (>= 4.1, < 5.2)
    hashie (3.5.5)
    hiredis (0.6.1)
    http (1.0.4)
      addressable (~> 2.3)
      http-cookie (~> 1.0)
      http-form_data (~> 1.0.1)
      http_parser.rb (~> 0.6.0)
    http-cookie (1.0.3)
      domain_name (~> 0.5)
    http-form_data (1.0.3)
    http_parser.rb (0.6.0)
    i18n (0.8.4)
    ice_nine (0.11.2)
    inherited_resources (1.7.2)
      actionpack (>= 3.2, < 5.2.x)
      has_scope (~> 0.6)
      railties (>= 3.2, < 5.2.x)
      responders
    jquery-rails (4.3.1)
      rails-dom-testing (>= 1, < 3)
      railties (>= 4.2.0)
      thor (>= 0.14, < 2.0)
    jquery-ui-rails (6.0.1)
      railties (>= 3.2.16)
    jshint-rb (1.1.1)
      execjs (>= 1.3.2)
      multi_json (>= 1.3.5)
    jshintrb (0.3.0)
      execjs
      multi_json (>= 1.3)
      rake
    json (1.8.6)
    jwt (1.5.6)
    kaminari (1.0.1)
      activesupport (>= 4.1.0)
      kaminari-actionview (= 1.0.1)
      kaminari-activerecord (= 1.0.1)
      kaminari-core (= 1.0.1)
    kaminari-actionview (1.0.1)
      actionview
      kaminari-core (= 1.0.1)
    kaminari-activerecord (1.0.1)
      activerecord
      kaminari-core (= 1.0.1)
    kaminari-core (1.0.1)
    kgio (2.11.0)
    launchy (2.4.3)
      addressable (~> 2.3)
    letter_opener (1.4.1)
      launchy (~> 2.2)
    libv8 (5.3.332.38.5)
    listen (3.0.8)
      rb-fsevent (~> 0.9, >= 0.9.4)
      rb-inotify (~> 0.9, >= 0.9.7)
    loofah (2.0.3)
      nokogiri (>= 1.5.9)
    lumberjack (1.0.12)
    mail (2.6.5)
      mime-types (>= 1.16, < 4)
    memoist (0.16.0)
    method_source (0.8.2)
    mime-types (3.1)
      mime-types-data (~> 3.2015)
    mime-types-data (3.2016.0521)
    mimemagic (0.3.2)
    mini_magick (4.7.0)
    mini_portile2 (2.2.0)
    mini_racer (0.1.9)
      libv8 (~> 5.3)
    minitest (5.10.2)
    modulejs-rails (2.2.0.0)
      railties (>= 4.0)
    multi_json (1.12.1)
    multi_xml (0.6.0)
    multipart-post (2.0.0)
    nenv (0.3.0)
    nio4r (2.1.0)
    nokogiri (1.8.0)
      mini_portile2 (~> 2.2.0)
    notiffany (0.1.1)
      nenv (~> 0.1)
      shellany (~> 0.0)
    oauth (0.5.3)
    oauth2 (1.3.1)
      faraday (>= 0.8, < 0.12)
      jwt (~> 1.0)
      multi_json (~> 1.3)
      multi_xml (~> 0.5)
      rack (>= 1.2, < 3)
    omniauth (1.6.1)
      hashie (>= 3.4.6, < 3.6.0)
      rack (>= 1.6.2, < 3)
    omniauth-facebook (4.0.0)
      omniauth-oauth2 (~> 1.2)
    omniauth-oauth (1.1.0)
      oauth
      omniauth (~> 1.0)
    omniauth-oauth2 (1.4.0)
      oauth2 (~> 1.0)
      omniauth (~> 1.2)
    omniauth-twitter (1.4.0)
      omniauth-oauth (~> 1.1)
      rack
    orm_adapter (0.5.0)
    paperclip (5.0.0)
      activemodel (>= 4.2.0)
      activesupport (>= 4.2.0)
      cocaine (~> 0.5.5)
      mime-types
      mimemagic (~> 0.3.0)
    parallel (1.11.2)
    parser (2.4.0.0)
      ast (~> 2.2)
    pg (0.20.0)
    polyamorous (1.3.1)
      activerecord (>= 3.0)
    powerpack (0.1.1)
    pry (0.10.4)
      coderay (~> 1.1.0)
      method_source (~> 0.8.1)
      slop (~> 3.4)
    pry-rails (0.3.6)
      pry (>= 0.10.4)
    public_suffix (2.0.5)
    puma (3.9.1)
    rack (2.0.3)
    rack-livereload (0.3.16)
      rack
    rack-protection (2.0.0)
      rack
    rack-test (0.6.3)
      rack (>= 1.0)
    rails (5.1.1)
      actioncable (= 5.1.1)
      actionmailer (= 5.1.1)
      actionpack (= 5.1.1)
      actionview (= 5.1.1)
      activejob (= 5.1.1)
      activemodel (= 5.1.1)
      activerecord (= 5.1.1)
      activesupport (= 5.1.1)
      bundler (>= 1.3.0, < 2.0)
      railties (= 5.1.1)
      sprockets-rails (>= 2.0.0)
    rails-dom-testing (2.0.3)
      activesupport (>= 4.2.0)
      nokogiri (>= 1.6)
    rails-html-sanitizer (1.0.3)
      loofah (~> 2.0)
    railties (5.1.1)
      actionpack (= 5.1.1)
      activesupport (= 5.1.1)
      method_source
      rake (>= 0.8.7)
      thor (>= 0.18.1, < 2.0)
    rainbow (2.2.2)
      rake
    raindrops (0.18.0)
    rake (12.0.0)
    ransack (1.8.2)
      actionpack (>= 3.0)
      activerecord (>= 3.0)
      activesupport (>= 3.0)
      i18n
      polyamorous (~> 1.3)
    rb-fsevent (0.9.8)
    rb-inotify (0.9.8)
      ffi (>= 0.5.0)
    rb-readline (0.5.4)
    redcarpet (3.4.0)
    redis (3.3.3)
    redis-namespace (1.5.3)
      redis (~> 3.0, >= 3.0.4)
    reek (4.7.0)
      codeclimate-engine-rb (~> 0.4.0)
      parser (>= 2.4.0.0, < 2.5)
      rainbow (~> 2.0)
    require_all (1.4.0)
    responders (2.4.0)
      actionpack (>= 4.2.0, < 5.3)
      railties (>= 4.2.0, < 5.3)
    route_translator (5.4.1)
      actionpack (>= 5.0.0.1, < 5.2)
      activesupport (>= 5.0.0.1, < 5.2)
    rspec (3.6.0)
      rspec-core (~> 3.6.0)
      rspec-expectations (~> 3.6.0)
      rspec-mocks (~> 3.6.0)
    rspec-core (3.6.0)
      rspec-support (~> 3.6.0)
    rspec-expectations (3.6.0)
      diff-lcs (>= 1.2.0, < 2.0)
      rspec-support (~> 3.6.0)
    rspec-mocks (3.6.0)
      diff-lcs (>= 1.2.0, < 2.0)
      rspec-support (~> 3.6.0)
    rspec-rails (3.6.0)
      actionpack (>= 3.0)
      activesupport (>= 3.0)
      railties (>= 3.0)
      rspec-core (~> 3.6.0)
      rspec-expectations (~> 3.6.0)
      rspec-mocks (~> 3.6.0)
      rspec-support (~> 3.6.0)
    rspec-support (3.6.0)
    rubocop (0.49.1)
      parallel (~> 1.10)
      parser (>= 2.3.3.1, < 3.0)
      powerpack (~> 0.1)
      rainbow (>= 1.99.1, < 3.0)
      ruby-progressbar (~> 1.7)
      unicode-display_width (~> 1.0, >= 1.0.1)
    rubocop-rspec (1.15.1)
      rubocop (>= 0.42.0)
    ruby-progressbar (1.8.1)
    rufus-scheduler (3.4.2)
      et-orbi (~> 1.0)
    rusage (0.2.0)
    sass (3.4.24)
    sass-rails (5.0.6)
      railties (>= 4.0.0, < 6)
      sass (~> 3.1)
      sprockets (>= 2.8, < 4.0)
      sprockets-rails (>= 2.0, < 4.0)
      tilt (>= 1.1, < 3)
    sassc (1.11.2)
      bundler
      ffi (~> 1.9.6)
      sass (>= 3.3.0)
    sassc-rails (1.3.0)
      railties (>= 4.0.0)
      sass
      sassc (~> 1.9)
      sprockets (> 2.11)
      sprockets-rails
      tilt
    scout_apm (2.2.0.pre3)
      rusage (~> 0.2.0)
    scss_lint (0.53.0)
      rake (>= 0.9, < 13)
      sass (~> 3.4.20)
    sentry-raven (2.5.1)
      faraday (>= 0.7.6, < 1.0)
    shellany (0.0.1)
    shoulda-matchers (3.1.1)
      activesupport (>= 4.0.0)
    sidekiq (4.2.10)
      concurrent-ruby (~> 1.0)
      connection_pool (~> 2.2, >= 2.2.0)
      rack-protection (>= 1.5.0)
      redis (~> 3.2, >= 3.2.1)
    sidekiq-cron (0.4.5)
      redis-namespace (>= 1.5.2)
      rufus-scheduler (>= 2.0.24)
      sidekiq (>= 4.2.1)
    sidekiq-statistic (1.2.0)
      sidekiq (>= 3.3.4, < 5)
    sidekiq-unique-jobs (5.0.8)
      sidekiq (>= 4.0, <= 6.0)
      thor (~> 0)
    simplecov (0.14.1)
      docile (~> 1.1.0)
      json (>= 1.8, < 3)
      simplecov-html (~> 0.10.0)
    simplecov-html (0.10.1)
    skylight (1.3.1)
      activesupport (>= 3.0.0)
    slop (3.6.0)
    spring (2.0.2)
      activesupport (>= 4.2)
    spring-commands-rspec (1.0.4)
      spring (>= 0.9.1)
    spring-commands-rubocop (0.2.0)
      spring (>= 1.0, < 3.0)
    spring-watcher-listen (2.0.1)
      listen (>= 2.7, < 4.0)
      spring (>= 1.2, < 3.0)
    sprockets (3.7.1)
      concurrent-ruby (~> 1.0)
      rack (> 1, < 3)
    sprockets-rails (3.2.0)
      actionpack (>= 4.0)
      activesupport (>= 4.0)
      sprockets (>= 3.0.0)
    thor (0.19.4)
    thread_safe (0.3.6)
    tilt (2.0.7)
    time_diff (0.3.0)
      activesupport
      i18n
    turbolinks (5.0.1)
      turbolinks-source (~> 5)
    turbolinks-source (5.0.3)
    tzinfo (1.2.3)
      thread_safe (~> 0.1)
    uglifier (3.2.0)
      execjs (>= 0.3.0, < 3)
    unf (0.1.4)
      unf_ext
    unf_ext (0.0.7.4)
    unicode-display_width (1.2.1)
    unicorn (5.3.0)
      kgio (~> 2.6)
      raindrops (~> 0.7)
    uniform_notifier (1.10.0)
    virtus (1.0.5)
      axiom-types (~> 0.1)
      coercible (~> 1.0)
      descendants_tracker (~> 0.0, >= 0.0.3)
      equalizer (~> 0.0, >= 0.0.9)
    warden (1.2.7)
      rack (>= 1.0)
    web-console (3.5.1)
      actionview (>= 5.0)
      activemodel (>= 5.0)
      bindex (>= 0.4.0)
      railties (>= 5.0)
    websocket-driver (0.6.5)
      websocket-extensions (>= 0.1.0)
    websocket-extensions (0.1.2)
    xpath (2.1.0)
      nokogiri (~> 1.3)

PLATFORMS
  ruby

DEPENDENCIES
  activeadmin
  activerecord-import
  annotate
  autoprefixer-rails
  awesome_print
  better_errors
  binding_of_caller
  braintree
  brakeman
  bullet
  byebug
  capybara
  cocoon
  contentful_model
  dalli
  database_cleaner
  devise
  factory_girl_rails
  ffaker
  fuubar
  gem-shut-the-fuck-up
  global
  guard
  guard-annotate
  guard-brakeman
  guard-bundler
  guard-compat
  guard-jshintrb
  guard-livereload (~> 2.4)
  guard-reek
  guard-rspec
  guard-rubocop
  guard-scss_lint
  guard-yamlsort
  has_permalink
  hiredis
  inherited_resources (~> 1.7)
  jquery-rails
  jshint-rb
  kaminari
  letter_opener
  listen (~> 3.0.5)
  memoist
  mini_magick
  mini_racer
  modulejs-rails
  omniauth-facebook
  omniauth-twitter
  paperclip
  pg
  pry-rails
  puma
  rack-livereload
  rails (= 5.1.1)
  ransack
  rb-readline
  redcarpet
  redis
  redis-namespace
  reek
  route_translator
  rspec-rails
  rubocop
  rubocop-rspec
  sassc-rails
  scout_apm (~> 2.2.x)
  scss_lint
  sentry-raven (>= 0.12.0)
  shoulda-matchers (~> 3.1)
  sidekiq (< 5)
  sidekiq-cron (~> 0.4.0)
  sidekiq-statistic
  sidekiq-unique-jobs
  simplecov
  skylight
  spring
  spring-commands-rspec
  spring-commands-rubocop
  spring-watcher-listen
  time_diff
  turbolinks
  uglifier (>= 1.3.0)
  unicorn
  warden
  web-console

RUBY VERSION
   ruby 2.3.1p112

BUNDLED WITH
   1.15.1

[jenseng]

Thanks for the bug report! Unfortunately Instructure doesn't actually use this gem anymore in canvas, since the GC improvements in newer versions of Ruby make i18nema's wins much less significant. We can leave this open if someone wants to submit a pull request to address this, but it's pretty unlikely to be fixed by anyone at Instructure.