Disable test_gdb.PrettyPrintTests when compiled with optimizations,
these often fail on PGO builds.
diff --git a/Lib/test/test_gdb.py b/Lib/test/test_gdb.py
index 313af2b..38e570f 100644
--- a/Lib/test/test_gdb.py
+++ b/Lib/test/test_gdb.py
@@ -265,6 +265,9 @@
     def get_sample_script(self):
         return findfile('gdb_sample.py')
 
+
+@unittest.skipIf(python_is_optimized(),
+                 "Python was compiled with optimizations")
 class PrettyPrintTests(DebuggerTests):
     def test_getting_backtrace(self):
         gdb_output = self.get_stack_trace('print 42')