The changed test passes on 3.4 branch, but fails on 2.7 branch:
$ python2.7 -m test.test_audioop
test_add (__main__.TestAudioop) ... ok
test_adpcm2lin (__main__.TestAudioop) ... ok
test_alaw2lin (__main__.TestAudioop) ... ok
test_avg (__main__.TestAudioop) ... ok
test_avgpp (__main__.TestAudioop) ... ok
test_bias (__main__.TestAudioop) ... ok
test_cross (__main__.TestAudioop) ... ok
test_findfactor (__main__.TestAudioop) ... ok
test_findfit (__main__.TestAudioop) ... ok
test_findmax (__main__.TestAudioop) ... ok
test_getsample (__main__.TestAudioop) ... ok
test_issue7673 (__main__.TestAudioop) ... ok
test_lin2adpcm (__main__.TestAudioop) ... ok
test_lin2alaw (__main__.TestAudioop) ... ok
test_lin2lin (__main__.TestAudioop) ... ok
test_lin2ulaw (__main__.TestAudioop) ... ok
test_max (__main__.TestAudioop) ... ok
test_maxpp (__main__.TestAudioop) ... ok
test_minmax (__main__.TestAudioop) ... ok
test_mul (__main__.TestAudioop) ... ok
test_negativelen (__main__.TestAudioop) ... ok
test_ratecv (__main__.TestAudioop) ... ERROR
test_reverse (__main__.TestAudioop) ... ok
test_rms (__main__.TestAudioop) ... ok
test_tomono (__main__.TestAudioop) ... ok
test_tostereo (__main__.TestAudioop) ... ok
test_ulaw2lin (__main__.TestAudioop) ... ok
test_wrongsize (__main__.TestAudioop) ... ok
======================================================================
ERROR: test_ratecv (__main__.TestAudioop)
----------------------------------------------------------------------
Traceback (most recent call last):
File "/usr/lib64/python2.7/test/test_audioop.py", line 304, in test_ratecv
3: packs[3](0, 0x0da740, 0x377776, -0x262fca,
KeyError: 3
----------------------------------------------------------------------
Ran 28 tests in 0.009s
FAILED (errors=1)
Traceback (most recent call last):
File "/usr/lib64/python2.7/runpy.py", line 162, in _run_module_as_main
"__main__", fname, loader, pkg_name)
File "/usr/lib64/python2.7/runpy.py", line 72, in _run_code
exec code in run_globals
File "/usr/lib64/python2.7/test/test_audioop.py", line 410, in <module>
test_main()
File "/usr/lib64/python2.7/test/test_audioop.py", line 407, in test_main
run_unittest(TestAudioop)
File "/usr/lib64/python2.7/test/test_support.py", line 1400, in run_unittest
_run_suite(suite)
File "/usr/lib64/python2.7/test/test_support.py", line 1383, in _run_suite
raise TestFailed(err)
test.test_support.TestFailed: Traceback (most recent call last):
File "/usr/lib64/python2.7/test/test_audioop.py", line 304, in test_ratecv
3: packs[3](0, 0x0da740, 0x377776, -0x262fca,
KeyError: 3
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