mirror of https://github.com/python/cpython
5de9842b34
don't understand how this function works, also beefed up the docs. The
most common usage error is of this form (often spread out across gotos):
if (_PyString_Resize(&s, n) < 0) {
Py_DECREF(s);
s = NULL;
goto outtahere;
}
The error is that if _PyString_Resize runs out of memory, it automatically
decrefs the input string object s (which also deallocates it, since its
refcount must be 1 upon entry), and sets s to NULL. So if the "if"
branch ever triggers, it's an error to call Py_DECREF(s): s is already
NULL! A correct way to write the above is the simpler (and intended)
if (_PyString_Resize(&s, n) < 0)
goto outtahere;
Bugfix candidate.
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|---|---|---|
| .. | ||
| .cvsignore | ||
| abstract.tex | ||
| api.tex | ||
| concrete.tex | ||
| exceptions.tex | ||
| init.tex | ||
| intro.tex | ||
| memory.tex | ||
| newtypes.tex | ||
| refcounting.tex | ||
| refcounts.dat | ||
| utilities.tex | ||
| veryhigh.tex | ||