require 'test/unit' module TestIRB class TestRaiseNoBacktraceException < Test::Unit::TestCase def test_raise_exception status = assert_in_out_err(%w[-rirb -e IRB.start(__FILE__) -- -f --], <<-IRB, /Exception: foo/, []) e = Exception.new("foo") def e.backtrace; nil; end raise e IRB end end end