[I wrote]
> Maybe we can add even detect the abusing cases by putting a test in
> PyString_InternInPlace() like this:
>
> if (s->ob_refcnt == 1) {
> PyErr_Warn(PyExc_DeprecationWarning,
> "interning won't keep your string alive");
> PyErr_Clear(); /* In case the warning was an error, ignore it */
> Py_INCREF(s); /* Make s immortal */
> }
I tried this, and alas it doesn't work; there are many legit places
where there's only one reference. So we'll have to use more
traditional ways of tracking down C code that makes assumptions of
immortality so it can drop its own reference. (Apart from
getclassname() I've seen none.)
--Guido van Rossum (home page: http://www.python.org/~guido/)
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