OPS-250 Modifying liquid error handling so that it no longer captures Exceptions that are not subclasses of StandardError (previously, it was rescuing things like Interrupt and NoMemoryError).

lib/liquid/block.rb

@@ -92,7 +92,7 @@ module Liquid
       list.collect do |token|
         begin
           token.respond_to?(:render) ? token.render(context) : token
-        rescue Exception => e
+        rescue ::StandardError => e
           context.handle_error(e)
         end
       end

test/lib/liquid/error_handling_test.rb

@@ -13,6 +13,10 @@ class ErrorDrop < Liquid::Drop
     raise Liquid::SyntaxError, 'syntax error'
   end
 
+  def exception
+    raise Exception, 'exception'
+  end
+
 end
 
 class ErrorHandlingTest < Test::Unit::TestCase
@@ -66,4 +70,12 @@ class ErrorHandlingTest < Test::Unit::TestCase
       assert_equal Liquid::ArgumentError, template.errors.first.class
     end
   end
+
+  # Liquid should not catch Exceptions that are not subclasses of StandardError, like Interrupt and NoMemoryError
+  def test_exceptions_propagate
+    assert_raise Exception do
+      template = Liquid::Template.parse( ' {{ errors.exception }} '  )
+      template.render('errors' => ErrorDrop.new)
+    end
+  end
 end # ErrorHandlingTest