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Original file line numberDiff line numberDiff line change@@ -1681,6 +1681,16 @@ def cleanup():
16811681setattr(object_to_patch, attr_name, new_value)
1685+defpatch_list(orig):
1686+"""Like unittest.mock.patch.dict, but for lists."""
1687+try:
1688+saved=orig[:]
1689+yield
1690+finally:
1691+orig[:] =saved
1692+1693+16841694defrun_in_subinterp(code):
16851695"""
16861696 Run code in a subinterpreter. Raise unittest.SkipTest if the tracemalloc
Original file line numberDiff line numberDiff line change@@ -59,6 +59,7 @@
5959fromitertoolsimportislice, repeat
6060fromtest.supportimportimport_helper
6161fromtest.supportimportos_helper
62+fromtest.supportimportpatch_list
626363646465classBdbException(Exception): pass
@@ -713,9 +714,18 @@ def test_until_in_caller_frame(self):
713714withTracerRun(self) astracer:
714715tracer.runcall(tfunc_main)
715716717+@patch_list(sys.meta_path)
716718deftest_skip(self):
717719# Check that tracing is skipped over the import statement in
718720# 'tfunc_import()'.
721+722+# Remove all but the standard importers.
723+sys.meta_path[:] = (
724+item
725+foriteminsys.meta_path
726+ifitem.__module__.startswith('_frozen_importlib')
727+ )
728+719729code="""
720730 def main():
721731 lno = 3
Original file line numberDiff line numberDiff line change@@ -0,0 +1 @@
1+In test_bdb.StateTestCase.test_skip, avoid including auxiliary importers.