F
======================================================================
FAIL: testHistoryBuiltin (__main__.BuiltinTest)
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Traceback (most recent call last):
  File "/home/uke/oil/builtin/readline_osh_test.py", line 49, in testHistoryBuiltin
    out = _TestHistory(['history', '2'])
  File "/home/uke/oil/builtin/readline_osh_test.py", line 91, in _TestHistory
    mem = state.Mem('', [], {}, arena, [], {})
  File "/home/uke/oil/core/state.py", line 1386, in __init__
    self.env_config = sh_init.EnvConfig(self, defaults)
  File "/home/uke/oil/core/sh_init.py", line 53, in __init__
    assert _env_config_instance is None, "Only one EnvConfig instance"
AssertionError: Only one EnvConfig instance

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Ran 1 test in 0.001s

FAILED (failures=1)