diff --git a/Library/.rubocop_cask.yml b/Library/.rubocop_cask.yml
index ee674b2d49..4e148c3445 100644
--- a/Library/.rubocop_cask.yml
+++ b/Library/.rubocop_cask.yml
@@ -24,10 +24,10 @@ Layout/AlignHash:
   EnforcedHashRocketStyle: table
   EnforcedColonStyle: table
 
-Layout/IndentArray:
+Layout/IndentFirstArrayElement:
   EnforcedStyle: align_brackets
 
-Layout/IndentHash:
+Layout/IndentFirstHashElement:
   EnforcedStyle: align_braces
 
 # Casks often contain long URLs and file paths.
diff --git a/Library/Homebrew/cask/cmd.rb b/Library/Homebrew/cask/cmd.rb
index eaa73213a5..efb5566fa3 100644
--- a/Library/Homebrew/cask/cmd.rb
+++ b/Library/Homebrew/cask/cmd.rb
@@ -157,15 +157,13 @@ module Cask
       Tap.default_cask_tap.install unless Tap.default_cask_tap.installed?
       self.class.run_command(command, *args)
     rescue CaskError, MethodDeprecatedError, ArgumentError, OptionParser::InvalidOption => e
-      msg = e.message
-      msg << e.backtrace.join("\n").prepend("\n") if ARGV.debug?
-      onoe msg
+      onoe e.message
+      $stderr.puts e.backtrace if ARGV.debug?
       exit 1
     rescue StandardError, ScriptError, NoMemoryError => e
-      msg = "#{e.message}\n"
-      msg << Utils.error_message_with_suggestions
-      msg << e.backtrace.join("\n")
-      onoe msg
+      onoe e.message
+      $stderr.puts Utils.error_message_with_suggestions
+      $stderr.puts e.backtrace
       exit 1
     end
 
diff --git a/Library/Homebrew/vendor/bundle/bundler/setup.rb b/Library/Homebrew/vendor/bundle/bundler/setup.rb
index f52e719531..0673a35876 100644
--- a/Library/Homebrew/vendor/bundle/bundler/setup.rb
+++ b/Library/Homebrew/vendor/bundle/bundler/setup.rb
@@ -45,7 +45,7 @@ $:.unshift "#{path}/../#{ruby_engine}/#{ruby_version}/gems/mechanize-2.7.6/lib"
 $:.unshift "#{path}/../#{ruby_engine}/#{ruby_version}/gems/mustache-1.1.0/lib"
 $:.unshift "#{path}/../#{ruby_engine}/#{ruby_version}/gems/parallel-1.17.0/lib"
 $:.unshift "#{path}/../#{ruby_engine}/#{ruby_version}/gems/parallel_tests-2.28.0/lib"
-$:.unshift "#{path}/../#{ruby_engine}/#{ruby_version}/gems/parser-2.6.2.1/lib"
+$:.unshift "#{path}/../#{ruby_engine}/#{ruby_version}/gems/parser-2.6.3.0/lib"
 $:.unshift "#{path}/../#{ruby_engine}/#{ruby_version}/gems/plist-3.5.0/lib"
 $:.unshift "#{path}/../#{ruby_engine}/#{ruby_version}/extensions/universal-darwin-18/2.3.0/psych-3.1.0"
 $:.unshift "#{path}/../#{ruby_engine}/#{ruby_version}/gems/psych-3.1.0/lib"
@@ -64,6 +64,7 @@ $:.unshift "#{path}/../#{ruby_engine}/#{ruby_version}/gems/rspec-wait-0.0.9/lib"
 $:.unshift "#{path}/../#{ruby_engine}/#{ruby_version}/gems/ruby-progressbar-1.10.0/lib"
 $:.unshift "#{path}/../#{ruby_engine}/#{ruby_version}/gems/unicode-display_width-1.5.0/lib"
 $:.unshift "#{path}/../#{ruby_engine}/#{ruby_version}/gems/rubocop-0.67.2/lib"
+$:.unshift "#{path}/../#{ruby_engine}/#{ruby_version}/gems/rubocop-performance-1.1.0/lib"
 $:.unshift "#{path}/../#{ruby_engine}/#{ruby_version}/gems/rubocop-rspec-1.32.0/lib"
 $:.unshift "#{path}/../#{ruby_engine}/#{ruby_version}/gems/ruby-macho-2.2.0/lib"
 $:.unshift "#{path}/../#{ruby_engine}/#{ruby_version}/gems/simplecov-cobertura-1.3.1/lib"
diff --git a/Library/Homebrew/vendor/bundle/ruby/2.3.0/gems/rubocop-performance-1.1.0/config/default.yml b/Library/Homebrew/vendor/bundle/ruby/2.3.0/gems/rubocop-performance-1.1.0/config/default.yml
new file mode 100644
index 0000000000..cc896dd05d
--- /dev/null
+++ b/Library/Homebrew/vendor/bundle/ruby/2.3.0/gems/rubocop-performance-1.1.0/config/default.yml
@@ -0,0 +1,209 @@
+# This is the default configuration file.
+
+Performance/Caller:
+  Description: >-
+             Use `caller(n..n)` instead of `caller`.
+  Enabled: true
+  VersionAdded: '0.49'
+
+Performance/CaseWhenSplat:
+  Description: >-
+                 Reordering `when` conditions with a splat to the end
+                 of the `when` branches can improve performance.
+  Enabled: false
+  AutoCorrect: false
+  SafeAutoCorrect: false
+  VersionAdded: '0.34'
+  VersionChanged: '0.59'
+
+Performance/Casecmp:
+  Description: >-
+             Use `casecmp` rather than `downcase ==`, `upcase ==`, `== downcase`, or `== upcase`..
+  Reference: 'https://github.com/JuanitoFatas/fast-ruby#stringcasecmp-vs-stringdowncase---code'
+  Enabled: true
+  VersionAdded: '0.36'
+
+Performance/ChainArrayAllocation:
+  Description: >-
+                  Instead of chaining array methods that allocate new arrays, mutate an
+                  existing array.
+  Reference: 'https://twitter.com/schneems/status/1034123879978029057'
+  Enabled: false
+  VersionAdded: '0.59'
+
+Performance/CompareWithBlock:
+  Description: 'Use `sort_by(&:foo)` instead of `sort { |a, b| a.foo <=> b.foo }`.'
+  Enabled: true
+  VersionAdded: '0.46'
+
+Performance/Count:
+  Description: >-
+                  Use `count` instead of `select...size`, `reject...size`,
+                  `select...count`, `reject...count`, `select...length`,
+                  and `reject...length`.
+  # This cop has known compatibility issues with `ActiveRecord` and other
+  # frameworks. ActiveRecord's `count` ignores the block that is passed to it.
+  # For more information, see the documentation in the cop itself.
+  # If you understand the known risk, you can disable `SafeMode`.
+  SafeMode: true
+  Enabled: true
+  VersionAdded: '0.31'
+  VersionChanged: '0.39'
+
+Performance/Detect:
+  Description: >-
+                  Use `detect` instead of `select.first`, `find_all.first`,
+                  `select.last`, and `find_all.last`.
+  Reference: 'https://github.com/JuanitoFatas/fast-ruby#enumerabledetect-vs-enumerableselectfirst-code'
+  # This cop has known compatibility issues with `ActiveRecord` and other
+  # frameworks. `ActiveRecord` does not implement a `detect` method and `find`
+  # has its own meaning. Correcting `ActiveRecord` methods with this cop
+  # should be considered unsafe.
+  SafeMode: true
+  Enabled: true
+  VersionAdded: '0.30'
+  VersionChanged: '0.39'
+
+Performance/DoubleStartEndWith:
+  Description: >-
+                  Use `str.{start,end}_with?(x, ..., y, ...)`
+                  instead of `str.{start,end}_with?(x, ...) || str.{start,end}_with?(y, ...)`.
+  Enabled: true
+  VersionAdded: '0.36'
+  VersionChanged: '0.48'
+  # Used to check for `starts_with?` and `ends_with?`.
+  # These methods are defined by `ActiveSupport`.
+  IncludeActiveSupportAliases: false
+
+Performance/EndWith:
+  Description: 'Use `end_with?` instead of a regex match anchored to the end of a string.'
+  Reference: 'https://github.com/JuanitoFatas/fast-ruby#stringmatch-vs-stringstart_withstringend_with-code-start-code-end'
+  # This will change to a new method call which isn't guaranteed to be on the
+  # object. Switching these methods has to be done with knowledge of the types
+  # of the variables which rubocop doesn't have.
+  SafeAutoCorrect: false
+  AutoCorrect: false
+  Enabled: true
+  VersionAdded: '0.36'
+  VersionChanged: '0.44'
+
+Performance/FixedSize:
+  Description: 'Do not compute the size of statically sized objects except in constants'
+  Enabled: true
+  VersionAdded: '0.35'
+
+Performance/FlatMap:
+  Description: >-
+                  Use `Enumerable#flat_map`
+                  instead of `Enumerable#map...Array#flatten(1)`
+                  or `Enumberable#collect..Array#flatten(1)`
+  Reference: 'https://github.com/JuanitoFatas/fast-ruby#enumerablemaparrayflatten-vs-enumerableflat_map-code'
+  Enabled: true
+  VersionAdded: '0.30'
+  EnabledForFlattenWithoutParams: false
+  # If enabled, this cop will warn about usages of
+  # `flatten` being called without any parameters.
+  # This can be dangerous since `flat_map` will only flatten 1 level, and
+  # `flatten` without any parameters can flatten multiple levels.
+
+Performance/InefficientHashSearch:
+  Description: 'Use `key?` or `value?` instead of `keys.include?` or `values.include?`'
+  Reference: 'https://github.com/JuanitoFatas/fast-ruby#hashkey-instead-of-hashkeysinclude-code'
+  Enabled: true
+  VersionAdded: '0.56'
+  Safe: false
+
+Performance/OpenStruct:
+  Description: 'Use `Struct` instead of `OpenStruct`.'
+  Enabled: false
+  VersionAdded: '0.61'
+  Safe: false
+
+Performance/RangeInclude:
+  Description: 'Use `Range#cover?` instead of `Range#include?`.'
+  Reference: 'https://github.com/JuanitoFatas/fast-ruby#cover-vs-include-code'
+  Enabled: true
+  VersionAdded: '0.36'
+  Safe: false
+
+Performance/RedundantBlockCall:
+  Description: 'Use `yield` instead of `block.call`.'
+  Reference: 'https://github.com/JuanitoFatas/fast-ruby#proccall-and-block-arguments-vs-yieldcode'
+  Enabled: true
+  VersionAdded: '0.36'
+
+Performance/RedundantMatch:
+  Description: >-
+                  Use `=~` instead of `String#match` or `Regexp#match` in a context where the
+                  returned `MatchData` is not needed.
+  Enabled: true
+  VersionAdded: '0.36'
+
+Performance/RedundantMerge:
+  Description: 'Use Hash#[]=, rather than Hash#merge! with a single key-value pair.'
+  Reference: 'https://github.com/JuanitoFatas/fast-ruby#hashmerge-vs-hash-code'
+  Enabled: true
+  VersionAdded: '0.36'
+  # Max number of key-value pairs to consider an offense
+  MaxKeyValuePairs: 2
+
+Performance/RegexpMatch:
+  Description: >-
+                  Use `match?` instead of `Regexp#match`, `String#match`, `Symbol#match`,
+                  `Regexp#===`, or `=~` when `MatchData` is not used.
+  Reference: 'https://github.com/JuanitoFatas/fast-ruby#regexp-vs-stringmatch-vs-string-vs-stringmatch-code-'
+  Enabled: true
+  VersionAdded: '0.47'
+
+Performance/ReverseEach:
+  Description: 'Use `reverse_each` instead of `reverse.each`.'
+  Reference: 'https://github.com/JuanitoFatas/fast-ruby#enumerablereverseeach-vs-enumerablereverse_each-code'
+  Enabled: true
+  VersionAdded: '0.30'
+
+Performance/Size:
+  Description: >-
+                  Use `size` instead of `count` for counting
+                  the number of elements in `Array` and `Hash`.
+  Reference: 'https://github.com/JuanitoFatas/fast-ruby#arraylength-vs-arraysize-vs-arraycount-code'
+  Enabled: true
+  VersionAdded: '0.30'
+
+Performance/StartWith:
+  Description: 'Use `start_with?` instead of a regex match anchored to the beginning of a string.'
+  Reference: 'https://github.com/JuanitoFatas/fast-ruby#stringmatch-vs-stringstart_withstringend_with-code-start-code-end'
+  # This will change to a new method call which isn't guaranteed to be on the
+  # object. Switching these methods has to be done with knowledge of the types
+  # of the variables which rubocop doesn't have.
+  SafeAutoCorrect: false
+  AutoCorrect: false
+  Enabled: true
+  VersionAdded: '0.36'
+  VersionChanged: '0.44'
+
+Performance/StringReplacement:
+  Description: >-
+                  Use `tr` instead of `gsub` when you are replacing the same
+                  number of characters. Use `delete` instead of `gsub` when
+                  you are deleting characters.
+  Reference: 'https://github.com/JuanitoFatas/fast-ruby#stringgsub-vs-stringtr-code'
+  Enabled: true
+  VersionAdded: '0.33'
+
+Performance/TimesMap:
+  Description: 'Checks for .times.map calls.'
+  AutoCorrect: false
+  Enabled: true
+  VersionAdded: '0.36'
+  VersionChanged: '0.50'
+  SafeAutoCorrect: false # see https://github.com/rubocop-hq/rubocop/issues/4658
+
+Performance/UnfreezeString:
+  Description: 'Use unary plus to get an unfrozen string literal.'
+  Enabled: true
+  VersionAdded: '0.50'
+
+Performance/UriDefaultParser:
+  Description: 'Use `URI::DEFAULT_PARSER` instead of `URI::Parser.new`.'
+  Enabled: true
+  VersionAdded: '0.50'