* bootstraptest/test_thread.rb: propagate the exception within a thread to

outer.


git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@25898 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

bootstraptest/test_thread.rb

@@ -393,9 +393,14 @@ assert_equal 'ok', %{
         m = Mutex.new
         Thread.new { m.lock; sleep 1 }
         sleep 0.3
+        parent = Thread.current
         Thread.new do
           sleep 0.3
-          fork { GC.start }
+          begin
+            fork { GC.start }
+          rescue Exception
+            parent.raise $!
+          end
         end
         m.lock
         pid, status = Process.wait2