Only try to Hash modules [Fixes #576]

lib/pry/default_commands/find_method.rb

@@ -90,9 +90,7 @@ class Pry
         # @yieldparam klazz  Each class/module in the namespace.
         #
         def recurse_namespace(klass, done={}, &block)
-          if done[klass] || !(Module === klass)
+          return if !(Module === klass) || done[klass]
-            return
-          end
 
           done[klass] = true
 

test/test_default_commands/test_find_method.rb

@@ -36,6 +36,14 @@ unless Pry::Helpers::BaseHelpers.mri_18?
       end
     end
 
+    it "should work with badly behaved constants" do
+      MyKlass::X = Object.new
+      def (MyKlass::X).hash
+        raise "mooo"
+      end
+
+      mock_pry("find-method -c timothy MyKlass").should =~ /MyKlass.*?hello/m
+    end
   end
 
   Object.remove_const(:MyKlass)