From 672f6dc3d7f28ea4e9c54a9dfbe5d1a406246e5c Mon Sep 17 00:00:00 2001
From: Rylan Polster <rslpolster@gmail.com>
Date: Fri, 16 Jul 2021 12:14:15 -0400
Subject: [PATCH] formula: fix `latest_version_installed?` for
 `HOMEBREW_JSON_CORE`

---
 Library/Homebrew/formula.rb | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/Library/Homebrew/formula.rb b/Library/Homebrew/formula.rb
index f6c3eca64d..8e76ee97e8 100644
--- a/Library/Homebrew/formula.rb
+++ b/Library/Homebrew/formula.rb
@@ -520,8 +520,8 @@ class Formula
   # exists and is not empty.
   # @private
   def latest_version_installed?
-    latest_prefix = if ENV["HOMEBREW_JSON_CORE"].present?
-      prefix BottleAPI.latest_pkg_version(name)
+    latest_prefix = if ENV["HOMEBREW_JSON_CORE"].present? && (latest_pkg_version = BottleAPI.latest_pkg_version(name))
+      prefix latest_pkg_version
     else
       latest_installed_prefix
     end