Sorry, it wasn't a proc object, it was a block. The following is a potential fix, but it's irritating to have to write it. blk = lambda { |arg1, arg2| #

Sorry, it wasn't a proc object, it was a block. The following is a potential fix, but it's irritating to have to write it. blk = lambda { |arg1, arg2| # do something } obj.some_method(&blk)