On 04/27/2016 09:14 AM, Serhiy Storchaka wrote:
There are three functions (or at least three documented functions) in C
API that "steals" references: PyList_SetItem(), PyTuple_SetItem() and
PyModule_AddObject(). The first two "steals" references even on failure,
and this is well known behaviour. But PyModule_AddObject() "steals" a
reference only on success. There is nothing in the documentation that
points on this.

This inconsistency has caused bugs (or, more fairly, potential leaks) before, see http://bugs.python.org/issue1782

Unfortunately, the suggested Python 3 change to PyModule_AddObject was not accepted.

1. Add a new function PyModule_AddObject2(), that steals a reference
even on failure.

This sounds like a good idea, except the name could be prettier :), e.g. PyModule_InsertObject. PyModule_AddObject could be deprecated.

Hrvoje

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