diff --git a/Library/Homebrew/rubocops/lines.rb b/Library/Homebrew/rubocops/lines.rb
index bda933b458..35639025bf 100644
--- a/Library/Homebrew/rubocops/lines.rb
+++ b/Library/Homebrew/rubocops/lines.rb
@@ -518,7 +518,7 @@ module RuboCop
 
           return if offenses.blank?
 
-          offenses[0...-1].each do |node|
+          T.must(offenses[0...-1]).each do |node|
             offending_node(node)
             problem "Use a single `generate_completions_from_executable` call
                          combining all specified shells" do |corrector|
diff --git a/Library/Homebrew/sorbet/rbi/hidden-definitions/hidden.rbi b/Library/Homebrew/sorbet/rbi/hidden-definitions/hidden.rbi
index 73a73d0cd9..72daf7acae 100644
--- a/Library/Homebrew/sorbet/rbi/hidden-definitions/hidden.rbi
+++ b/Library/Homebrew/sorbet/rbi/hidden-definitions/hidden.rbi
@@ -5098,6 +5098,12 @@ class RuboCop::Cop::FormulaAudit::DeprecateDisableReason
   def reason(param0); end
 end
 
+class RuboCop::Cop::FormulaAudit::GenerateCompletionsDSL
+  def correctable_shell_completion_node(param0); end
+
+  def shell_completion_node(param0); end
+end
+
 class RuboCop::Cop::FormulaAudit::GitUrls
   def url_has_revision?(param0=T.unsafe(nil)); end
 end