* lib/irb.rb: Prevent irb from crashing when exception with

  nil backtrace is raised.
  [fix GH-434][ruby-core:58078][Bug #9063]
* test/irb/test_raise_no_backtrace_exception.rb: ditto.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@47164 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

1 files changed, 14 insertions, 0 deletions

diff --git a/test/irb/test_raise_no_backtrace_exception.rb b/test/irb/test_raise_no_backtrace_exception.rb
new file mode 100644
index 0000000000..e8204d7a1b
--- /dev/null
+++ b/test/irb/test_raise_no_backtrace_exception.rb
@@ -0,0 +1,14 @@
+require 'test/unit'
+require_relative '../ruby/envutil'
+
+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