test_rinda.rb: hungup investigation

* test/rinda/test_rinda.rb (test_do_reply): abort on exception to
  investigate sporadic hungups on rubyci.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@44632 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

test/rinda/test_rinda.rb

@@ -559,6 +559,8 @@ class TestRingServer < Test::Unit::TestCase
   end
 
   def test_do_reply
+    aoe = Thread.abort_on_exception
+    Thread.abort_on_exception = true
     tl0 = Thread.list
     tl = nil
     th = Thread.new(Thread.current) do |mth|
@@ -604,6 +606,7 @@ class TestRingServer < Test::Unit::TestCase
     raise Timeout::Error, "timeout", bt
   ensure
     th.kill if th
+    Thread.abort_on_exception = aoe
   end
 
   def test_do_reply_local