From f9fe5b6798d9fb4acbbe2779ab745a33d745108f Mon Sep 17 00:00:00 2001
From: Mike McQuaid <mike@mikemcquaid.com>
Date: Wed, 7 Sep 2016 11:40:25 +0100
Subject: [PATCH] test-bot: handle missing tap in exception.

Handle the case where a `FormulaUnavailableError` does not contain a tap
reference so fall back to `CoreTap` in this case.
---
 Library/Homebrew/dev-cmd/test-bot.rb | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/Library/Homebrew/dev-cmd/test-bot.rb b/Library/Homebrew/dev-cmd/test-bot.rb
index bf332ac256..dc176f52e0 100644
--- a/Library/Homebrew/dev-cmd/test-bot.rb
+++ b/Library/Homebrew/dev-cmd/test-bot.rb
@@ -248,8 +248,9 @@ module Homebrew
     def safe_formula_canonical_name(formula_name)
       Formulary.factory(formula_name).full_name
     rescue TapFormulaUnavailableError, FormulaUnavailableError => e
-      raise if e.tap.installed?
-      test "brew", "tap", e.tap.name
+      exception_tap = e.tap || CoreTap.instance
+      raise if exception_tap.installed?
+      test "brew", "tap", exception_tap.name
       retry unless steps.last.failed?
       onoe e
       puts e.backtrace