Revert "Don't raise in mach_data so the debugger doesn't catch it"

This reverts commit 4f8a3e2113c2e7b88600ff6371f9f70579c55509.

Library/Homebrew/mach.rb

@@ -53,10 +53,7 @@ module MachO
   # /usr/include/mach-o/fat.h
 
   def mach_data
-    @mach_data ||= _mach_data
-  end
-
-  def _mach_data
+    @mach_data ||= begin
       offsets = []
       mach_data = []
 
@@ -76,7 +73,7 @@ module MachO
       when 0x7f454c46 # ELF
         mach_data << { :arch => :x86_64, :type => :executable }
       else
-      return []
+        raise "Not a Mach-O binary."
       end
 
       offsets.each do |offset|
@@ -97,8 +94,10 @@ module MachO
 
         mach_data << { :arch => arch, :type => type }
       end
-
       mach_data
+    rescue
+      []
+    end
   end
 
   def archs