From 8193807f8d00337f72e73658e3b14df9a0f3f0d0 Mon Sep 17 00:00:00 2001
From: Rylan Polster <rslpolster@gmail.com>
Date: Thu, 21 Oct 2021 18:27:43 -0400
Subject: [PATCH] `update-report`: fix unset cask repo variable error

---
 Library/Homebrew/cmd/update-report.rb | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/Library/Homebrew/cmd/update-report.rb b/Library/Homebrew/cmd/update-report.rb
index 7c0df7ad20..49fa06d917 100644
--- a/Library/Homebrew/cmd/update-report.rb
+++ b/Library/Homebrew/cmd/update-report.rb
@@ -136,7 +136,9 @@ module Homebrew
     updated_taps = []
     Tap.each do |tap|
       next unless tap.git?
-      next if tap.core_tap? && ENV["HOMEBREW_INSTALL_FROM_API"].present? && args.preinstall?
+      if (tap.core_tap? || tap == "homebrew/cask") && ENV["HOMEBREW_INSTALL_FROM_API"].present? && args.preinstall?
+        next
+      end
 
       if ENV["HOMEBREW_MIGRATE_LINUXBREW_FORMULAE"].present? && tap.core_tap? &&
          Settings.read("linuxbrewmigrated") != "true"