test_gdb is currently failing on the following buildbots:

http://buildbot.python.org/all/#/builders/54/builds/465
http://buildbot.python.org/all/#/builders/66/builds/178
http://buildbot.python.org/all/#/builders/16/builds/1279
http://buildbot.python.org/all/#/builders/122/builds/481

Sample error lines:


======================================================================
FAIL: test_threads (test.test_gdb.PyBtTests)
Verify that "py-bt" indicates threads that are waiting for the GIL
----------------------------------------------------------------------
Traceback (most recent call last):
  File "/home/dje/cpython-buildarea/3.7.edelsohn-sles-z/build/Lib/test/test_gdb.py", line 776, in test_threads
    cmds_after_breakpoint=['thread apply all py-bt'])
  File "/home/dje/cpython-buildarea/3.7.edelsohn-sles-z/build/Lib/test/test_gdb.py", line 213, in get_stack_trace
    self.assertEqual(unexpected_errlines, [])
AssertionError: Lists differ: ["Python Exception <class 'gdb.error'> PC [58 chars]ved'] != []
First list contains 2 additional elements.
First extra element 0:
"Python Exception <class 'gdb.error'> PC not saved: "
+ []
- ["Python Exception <class 'gdb.error'> PC not saved: ",
-  'Error occurred in Python command: PC not saved']
----------------------------------------------------------------------
Ran 46 tests in 19.888s
FAILED (failures=1)
1 test failed again:
    test_gdb