Do this in a saner way

1 files changed, 6 insertions, 2 deletions

diff --git a/Library/Homebrew/formula.rb b/Library/Homebrew/formula.rb
index dbd31fade..0135726ac 100644
--- a/Library/Homebrew/formula.rb
+++ b/Library/Homebrew/formula.rb
@@ -350,8 +350,12 @@ class Formula
   end
 
   def self.installed
-    # `rescue nil` is here to skip kegs with no corresponding formulae
-    HOMEBREW_CELLAR.children.map{ |rack| factory(rack.basename.to_s) rescue nil }.compact
+    HOMEBREW_CELLAR.children.map do |rack|
+      begin
+        factory(rack.basename.to_s)
+      rescue FormulaUnavailableError
+      end
+    end.compact
   end
 
   def self.aliases