* test_thread.rb: DO NOT USE FORK WITHOUT RESCUE.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@25850 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

bootstraptest/test_thread.rb

@@ -420,10 +420,13 @@ assert_finish 3, %q{
     end
   end
 
-  pid = fork do
-    # Child
-    STDOUT.write "This is the child process.\n"
-    STDOUT.write "Child process exiting.\n"
+  begin
+    pid = fork do
+      # Child
+      STDOUT.write "This is the child process.\n"
+      STDOUT.write "Child process exiting.\n"
+    end
+    Process.waitpid(pid)
+  rescue NotImplementedError
   end
-  Process.waitpid(pid)
 }, '[ruby-core:26361]'