[issue12291] file written using marshal in 3.2 can be read by 2.7, but not 3.2 or 3.3
Vinay Sajip
report at bugs.python.org
Sun Jun 19 17:43:11 CEST 2011
Vinay Sajip <vinay_sajip at yahoo.co.uk> added the comment:
This seems a bit hacky, and I'm not sure how reliable it is. I added this after the read_object call:
if (is_file) {
PyObject * newpos;
int cp, np;
cp = ftell(rf.fp);
newpos = PyObject_CallMethod(f, "seek", "ii", cp, SEEK_SET);
assert(newpos != NULL);
np = PyLong_AsLong(newpos);
Py_DECREF(newpos);
assert(cp == np);
}
When I run the code lots of times, I sometimes get assertion failures at the
assert(newpos != NULL)
line. It's not an EOF condition thing, necessarily: I do get expected behaviour at least sometimes when seeking to the end of file.
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<http://bugs.python.org/issue12291>
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