Eric Snow added the comment:
I've spent a bit of time exploring the segfault. Here's some data that might
help relative to the configparser test.
I put the following at the beginning of _odict_resize:
Py_ssize_t len = PyObject_Size((PyObject *)od);
if (len == 0)
PySys_FormatStdout(".");
else {
if (((PyDictObject *)od)->ma_keys->dk_size < od->od_size)
PySys_FormatStdout("-");
if (len < 10)
PySys_FormatStdout("%d", len);
else
PySys_FormatStdout("+");
}
if (len >= 10)
PySys_FormatStdout("%d\n", len);
If the current item count is 0 then it prints a dot. If the resize is
shrinking then it prints a - (this did not happen). Otherwise the odict is
growing and it prints the current item count. Multi-digit numbers are preceded
by + and followed by a newline.
I've included the results of different hash seeds (0/no randomization, 1, and
7). You'll notice how the results are subtly different. In the case of 7, it
matches no randomization up to the point that it segfaults. I got the same
results with 15. However, 35 fails right after the second +22.
$ PYTHONHASHSEED=0 ./python -m test.regrtest -m test_basic test_configparser
...6+12
+22
....6+12
+22
........6.6........+10
........6.6........+10
........6.6........+10
........6.6........+10
........6.6........+10
.+10
........6.6........+10
........6.6........+10
........6.6........+10
........6.6...............6..6............+10
....6.6.6.6.66.66.6.6.6.6.+12
6.+12
6.6.6.6.6.6.6.6.6.+22
6.+22
6.6.6.6.6.6.6.6.6.6.6.6.6.6.6.6.6.6.6.6.6.+44
6.+44
6.6.6.6.6.6.6.6.6.6.6.6.6.6.6.6.6.6.6.6.6.6.6.6.6.6.6.6.6.6.6.6.6.6.6.6.6.6.6.6.6.+86
6.+86
6.6.6.6.6.6.6.6.6.6.6.6.6.6.6........6.6........+10
........6.6........+10
........6.6........+10
........6.6........+10
.6..
$ PYTHONHASHSEED=1 ./python -m test.regrtest -m test_basic test_configparser
...6+12
+22
....6+12
+22
........6.6................6.6................6.6................6.6................6.6.........+11
........6.6................6.6................6.6................6.6...............6..6................6.6.6.6.66.66.6.6.6.6.+12
6.+12
6.6.6.6.6.6.6.6.6.+22
6.+22
6.6.6.6.6.6.6.6.6.6.6.6.6.6.6.6.6.6.6.6.6.+44
6.+44
6.6.6.6.6.6.6.6.6.6.6.6.6.6.6.6.6.6.6.6.6.6.6.6.6.6.6.6.6.6.6.6.6.6.6.6.6.6.6.6.6.+86
6.+86
6.6.6.6.6.6.6.6.6.6.6.6.6.6.6........6.6................6.6................6.6................6.6.........6..
$ PYTHONHASHSEED=7 ./python -m test.regrtest -m test_basic test_configparser
...6+12
+22
....6+12
+22
........6.6........+10
........6.6........+10
........6.6........+10
........6.6........+10
........6.6........+10
.+10
Fatal Python error: Segmentation fault
----------
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<http://bugs.python.org/issue16991>
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