Anthony Sottile added the comment:
I'm seeing this same failure in python3.5 on 16.04 about 20% of the time:
```
$ python3.5 -m test -v test_dbm
== CPython 3.5.2 (default, Nov 17 2016, 17:05:23) [GCC 5.4.0 20160609]
== Linux-4.4.0-57-generic-x86_64-with-Ubuntu-16.04-xenial little-endian
== hash algorithm: siphash24 64bit
== /tmp/test_python_8169
Testing with flags: sys.flags(debug=0, inspect=0, interactive=0, optimize=0,
dont_write_bytecode=0, no_user_site=0, no_site=0, ignore_environment=0,
verbose=0, bytes_warning=0, quiet=0, hash_randomization=1, isolated=0)
[1/1] test_dbm
test_keys (test.test_dbm.WhichDBTestCase) ... ok
test_whichdb (test.test_dbm.WhichDBTestCase) ... ok
test_whichdb_ndbm (test.test_dbm.WhichDBTestCase) ... BDB0004 fop_read_meta:
@test_8169_tmp_ndbm.db: unexpected file type or format
ok
test_anydbm_access (test.test_dbm.TestCase-dbm.gnu) ... ok
test_anydbm_creation (test.test_dbm.TestCase-dbm.gnu) ... ok
test_anydbm_creation_n_file_exists_with_invalid_contents
(test.test_dbm.TestCase-dbm.gnu) ... ok
test_anydbm_keys (test.test_dbm.TestCase-dbm.gnu) ... ok
test_anydbm_modification (test.test_dbm.TestCase-dbm.gnu) ... ok
test_anydbm_not_existing (test.test_dbm.TestCase-dbm.gnu) ... ok
test_anydbm_read (test.test_dbm.TestCase-dbm.gnu) ... ok
test_error (test.test_dbm.TestCase-dbm.gnu) ... ok
test_anydbm_access (test.test_dbm.TestCase-dbm.ndbm) ... ok
test_anydbm_creation (test.test_dbm.TestCase-dbm.ndbm) ... ERROR
BDB3028 @test_8169_tmp.db: unable to flush: No such file or directory
test_anydbm_creation_n_file_exists_with_invalid_contents
(test.test_dbm.TestCase-dbm.ndbm) ... ok
test_anydbm_keys (test.test_dbm.TestCase-dbm.ndbm) ... ok
test_anydbm_modification (test.test_dbm.TestCase-dbm.ndbm) ... ERROR
BDB3028 @test_8169_tmp.db: unable to flush: No such file or directory
test_anydbm_not_existing (test.test_dbm.TestCase-dbm.ndbm) ... ok
test_anydbm_read (test.test_dbm.TestCase-dbm.ndbm) ... ERROR
test_error (test.test_dbm.TestCase-dbm.ndbm) ... ok
test_anydbm_access (test.test_dbm.TestCase-dbm.dumb) ... ok
test_anydbm_creation (test.test_dbm.TestCase-dbm.dumb) ... ok
test_anydbm_creation_n_file_exists_with_invalid_contents
(test.test_dbm.TestCase-dbm.dumb) ... ok
test_anydbm_keys (test.test_dbm.TestCase-dbm.dumb) ... ok
test_anydbm_modification (test.test_dbm.TestCase-dbm.dumb) ... ok
test_anydbm_not_existing (test.test_dbm.TestCase-dbm.dumb) ... ok
test_anydbm_read (test.test_dbm.TestCase-dbm.dumb) ... ok
test_error (test.test_dbm.TestCase-dbm.dumb) ... ok
======================================================================
ERROR: test_anydbm_creation (test.test_dbm.TestCase-dbm.ndbm)
----------------------------------------------------------------------
Traceback (most recent call last):
File "/usr/lib/python3.5/test/test_dbm.py", line 74, in test_anydbm_creation
self.read_helper(f)
File "/usr/lib/python3.5/test/test_dbm.py", line 115, in read_helper
self.assertEqual(self._dict[key], f[key.encode("ascii")])
KeyError: b'0'
======================================================================
ERROR: test_anydbm_modification (test.test_dbm.TestCase-dbm.ndbm)
----------------------------------------------------------------------
Traceback (most recent call last):
File "/usr/lib/python3.5/test/test_dbm.py", line 89, in
test_anydbm_modification
self.read_helper(f)
File "/usr/lib/python3.5/test/test_dbm.py", line 115, in read_helper
self.assertEqual(self._dict[key], f[key.encode("ascii")])
KeyError: b'0'
======================================================================
ERROR: test_anydbm_read (test.test_dbm.TestCase-dbm.ndbm)
----------------------------------------------------------------------
Traceback (most recent call last):
File "/usr/lib/python3.5/test/test_dbm.py", line 95, in test_anydbm_read
self.read_helper(f)
File "/usr/lib/python3.5/test/test_dbm.py", line 115, in read_helper
self.assertEqual(self._dict[key], f[key.encode("ascii")])
KeyError: b'0'
----------------------------------------------------------------------
Ran 27 tests in 0.093s
FAILED (errors=3)
test test_dbm failed
1 test failed:
test_dbm
```
Under 3.6 (built from source), it seems to fail 100% of the time
```
$ ./python -m test test_dbm -v
== CPython 3.6.0 (default, Jan 9 2017, 15:00:38) [GCC 5.4.0 20160609]
== Linux-4.4.0-57-generic-x86_64-with-debian-stretch-sid little-endian
== hash algorithm: siphash24 64bit
== cwd: /home/asottile/workspace/cpython/build/test_python_8246
== encodings: locale=UTF-8, FS=utf-8
Testing with flags: sys.flags(debug=0, inspect=0, interactive=0, optimize=0,
dont_write_bytecode=0, no_user_site=0, no_site=0, ignore_environment=0,
verbose=0, bytes_warning=0, quiet=0, hash_randomization=1, isolated=0)
Run tests sequentially
0:00:00 [1/1] test_dbm
test_keys (test.test_dbm.WhichDBTestCase) ... ok
test_whichdb (test.test_dbm.WhichDBTestCase) ... ok
test_whichdb_ndbm (test.test_dbm.WhichDBTestCase) ... BDB0004 fop_read_meta:
@test_8246_tmp_ndbm.db: unexpected file type or format
ok
test_anydbm_access (test.test_dbm.TestCase-dbm.gnu) ... ok
test_anydbm_creation (test.test_dbm.TestCase-dbm.gnu) ... ok
test_anydbm_creation_n_file_exists_with_invalid_contents
(test.test_dbm.TestCase-dbm.gnu) ... ok
test_anydbm_keys (test.test_dbm.TestCase-dbm.gnu) ... ok
test_anydbm_modification (test.test_dbm.TestCase-dbm.gnu) ... ok
test_anydbm_not_existing (test.test_dbm.TestCase-dbm.gnu) ... ok
test_anydbm_read (test.test_dbm.TestCase-dbm.gnu) ... ok
test_error (test.test_dbm.TestCase-dbm.gnu) ... ok
test_anydbm_access (test.test_dbm.TestCase-dbm.ndbm) ... ok
test_anydbm_creation (test.test_dbm.TestCase-dbm.ndbm) ... ERROR
BDB3028 @test_8246_tmp.db: unable to flush: No such file or directory
test_anydbm_creation_n_file_exists_with_invalid_contents
(test.test_dbm.TestCase-dbm.ndbm) ... ok
test_anydbm_keys (test.test_dbm.TestCase-dbm.ndbm) ... ok
test_anydbm_modification (test.test_dbm.TestCase-dbm.ndbm) ... ERROR
BDB3028 @test_8246_tmp.db: unable to flush: No such file or directory
test_anydbm_not_existing (test.test_dbm.TestCase-dbm.ndbm) ... ok
test_anydbm_read (test.test_dbm.TestCase-dbm.ndbm) ... ERROR
test_error (test.test_dbm.TestCase-dbm.ndbm) ... ok
test_anydbm_access (test.test_dbm.TestCase-dbm.dumb) ... ok
test_anydbm_creation (test.test_dbm.TestCase-dbm.dumb) ... ok
test_anydbm_creation_n_file_exists_with_invalid_contents
(test.test_dbm.TestCase-dbm.dumb) ... ok
test_anydbm_keys (test.test_dbm.TestCase-dbm.dumb) ... ok
test_anydbm_modification (test.test_dbm.TestCase-dbm.dumb) ... ok
test_anydbm_not_existing (test.test_dbm.TestCase-dbm.dumb) ... ok
test_anydbm_read (test.test_dbm.TestCase-dbm.dumb) ... ok
test_error (test.test_dbm.TestCase-dbm.dumb) ... ok
======================================================================
ERROR: test_anydbm_creation (test.test_dbm.TestCase-dbm.ndbm)
----------------------------------------------------------------------
Traceback (most recent call last):
File "/home/asottile/workspace/cpython/Lib/test/test_dbm.py", line 73, in
test_anydbm_creation
self.read_helper(f)
File "/home/asottile/workspace/cpython/Lib/test/test_dbm.py", line 114, in
read_helper
self.assertEqual(self._dict[key], f[key.encode("ascii")])
KeyError: b'0'
======================================================================
ERROR: test_anydbm_modification (test.test_dbm.TestCase-dbm.ndbm)
----------------------------------------------------------------------
Traceback (most recent call last):
File "/home/asottile/workspace/cpython/Lib/test/test_dbm.py", line 88, in
test_anydbm_modification
self.read_helper(f)
File "/home/asottile/workspace/cpython/Lib/test/test_dbm.py", line 114, in
read_helper
self.assertEqual(self._dict[key], f[key.encode("ascii")])
KeyError: b'0'
======================================================================
ERROR: test_anydbm_read (test.test_dbm.TestCase-dbm.ndbm)
----------------------------------------------------------------------
Traceback (most recent call last):
File "/home/asottile/workspace/cpython/Lib/test/test_dbm.py", line 94, in
test_anydbm_read
self.read_helper(f)
File "/home/asottile/workspace/cpython/Lib/test/test_dbm.py", line 114, in
read_helper
self.assertEqual(self._dict[key], f[key.encode("ascii")])
KeyError: b'0'
----------------------------------------------------------------------
Ran 27 tests in 0.084s
FAILED (errors=3)
test test_dbm failed
test_dbm failed
1 test failed:
test_dbm
Total duration: 112 ms
Tests result: FAILURE
```
----------
nosy: +asottile
versions: +Python 3.5, Python 3.6
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Python tracker <rep...@bugs.python.org>
<http://bugs.python.org/issue20094>
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