require "coverage.so"
module Coverage
def self.line_stub(file)
lines = File.foreach(file).map { nil }
iseqs = [RubyVM::InstructionSequence.compile_file(file)]
until iseqs.empty?
iseq = iseqs.pop
iseq.trace_points.each {|n, type| lines[n - 1] = 0 if type == :line }
iseq.each_child {|child| iseqs << child }
end
lines
end
end