You're using the syntax of serialize properly.
The problem looks like it's in the JSON.load method not properly handling a
nil value:
def load(source, proc = nil)
if source.respond_to? :to_str
source = source.to_str
elsif source.respond_to? :to_io
source = source.to_io.read
else
source = source.read
end
result = parse(source, :max_nesting => false, :allow_nan => true)
recurse_proc(result, &proc) if proc
result
end
Basically it gets to the line "source = source.read" and throws up because
source is nil and nil doesn't have a read method.
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