Handle exception explicitly in TestBignum#test_interrupt_during_to_s

* Otherwise it produces a warning with Thread.report_on_exception=true.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@61189 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

1 files changed, 5 insertions, 3 deletions

diff --git a/test/ruby/test_bignum.rb b/test/ruby/test_bignum.rb
index 3ead77766d..65d974005e 100644
--- a/test/ruby/test_bignum.rb
+++ b/test/ruby/test_bignum.rb
@@ -617,12 +617,14 @@ class TestBignum < Test::Unit::TestCase
     num = (65536 ** 65536)
     thread = Thread.new do
       start_flag = true
-      num.to_s
-      end_flag = true
+      assert_raise(RuntimeError) {
+        num.to_s
+        end_flag = true
+      }
     end
     sleep 0.001 until start_flag
     thread.raise
-    thread.join rescue nil
+    thread.join
     time = Time.now - time
     skip "too fast cpu" if end_flag
     assert_operator(time, :<, 10)