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SF bug 555042: zip() may trigger MemoryError.

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NOT a bugfix candidate:  this is a fix to an optimization introduced
in 2.3.
This commit is contained in:
Tim Peters 2002-05-12 07:19:38 +00:00
parent 9b1df1db68
commit 39a86c2188
2 changed files with 18 additions and 3 deletions
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9
Python/bltinmodule.c
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@ -1717,13 +1717,18 @@ builtin_zip(PyObject *self, PyObject *args)
/* args must be a tuple */
assert(PyTuple_Check(args));
/* Guess at result length: the shortest of the input lengths. */
/* Guess at result length: the shortest of the input lengths.
If some argument refuses to say, we refuse to guess too, lest
an argument like xrange(sys.maxint) lead us astray.*/
len = -1; /* unknown */
for (i = 0; i < itemsize; ++i) {
PyObject *item = PyTuple_GET_ITEM(args, i);
int thislen = PySequence_Length(item);
if (thislen < 0)
if (thislen < 0) {
PyErr_Clear();
len = -1;
break;
}
else if (len < 0 || thislen < len)
len = thislen;
}