From 4c48ace9d1f75f2367104c1f1b23fe75f7470b1a Mon Sep 17 00:00:00 2001
From: Bo Anderson <mail@boanderson.me>
Date: Fri, 17 Sep 2021 00:08:19 +0100
Subject: [PATCH] cmd/info: print backtrace to developers for unreadable
 formulae/casks

---
 Library/Homebrew/cmd/info.rb | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/Library/Homebrew/cmd/info.rb b/Library/Homebrew/cmd/info.rb
index 46819f606c..8843dfb054 100644
--- a/Library/Homebrew/cmd/info.rb
+++ b/Library/Homebrew/cmd/info.rb
@@ -153,7 +153,14 @@ module Homebrew
         info_formula(obj, args: args)
       when Cask::Cask
         info_cask(obj, args: args)
+      when FormulaUnreadableError, FormulaClassUnavailableError,
+         TapFormulaUnreadableError, TapFormulaClassUnavailableError,
+         Cask::CaskUnreadableError
+        # We found the formula/cask, but failed to read it
+        $stderr.puts obj.backtrace if Homebrew::EnvConfig.developer?
+        ofail obj.message
       when FormulaOrCaskUnavailableError
+        # The formula/cask could not be found
         ofail obj.message
         # No formula with this name, try a missing formula lookup
         if (reason = MissingFormula.reason(obj.name, show_info: true))