From 1d7856c4f11f92f0e2c26fbf99f4ef26a56c80ee Mon Sep 17 00:00:00 2001
From: Carlo Cabrera <30379873+carlocab@users.noreply.github.com>
Date: Fri, 23 Sep 2022 06:00:26 +0800
Subject: [PATCH] formula_auditor: fix false negatives in
 `audit_gcc_dependency`

This audit is mistakenly passing for formulae where
`variations_dependencies` is an empty array. We can fix that by checking
for `nil` instead.

See Homebrew/homebrew-core#111280.
---
 Library/Homebrew/formula_auditor.rb | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/Library/Homebrew/formula_auditor.rb b/Library/Homebrew/formula_auditor.rb
index 705d18fa78..b68a81f3df 100644
--- a/Library/Homebrew/formula_auditor.rb
+++ b/Library/Homebrew/formula_auditor.rb
@@ -892,8 +892,9 @@ module Homebrew
           # This variation either:
           #   1. does not exist
           #   2. has no variation-specific dependencies
-          # In either case, it matches Linux.
-          return false if variation_dependencies.blank?
+          # In either case, it matches Linux. We must check for `nil` because an empty
+          # array indicates that this variation does not depend on GCC.
+          return false if variation_dependencies.nil?
           # We found a non-Linux variation that depends on GCC.
           return false if variation_dependencies.include?("gcc")
         end