From 71218a29d22f335eccaa5870e46b3667f134c4b7 Mon Sep 17 00:00:00 2001
From: Mike McQuaid <mike@mikemcquaid.com>
Date: Wed, 23 Oct 2013 12:39:42 +0100
Subject: [PATCH] installer: don't try and unlink nil tabfile.

Closes Homebrew/homebrew#23472.
---
 Library/Homebrew/formula_installer.rb | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/Library/Homebrew/formula_installer.rb b/Library/Homebrew/formula_installer.rb
index a7b233cf39..0a6277384c 100644
--- a/Library/Homebrew/formula_installer.rb
+++ b/Library/Homebrew/formula_installer.rb
@@ -534,7 +534,7 @@ class FormulaInstaller
     return if stdlibs.empty?
 
     tab = Tab.for_formula(f)
-    tab.tabfile.unlink
+    tab.tabfile.unlink if tab.tabfile
     # It's technically possible for the same lib to link to multiple C++ stdlibs,
     # but very bad news. Right now we don't track this woeful scenario.
     tab.stdlib = stdlibs.first