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gh-101819: Harden _io init #104352

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merged 1 commit into from
May 10, 2023
Merged

gh-101819: Harden _io init #104352

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7 changes: 4 additions & 3 deletions Modules/_io/_iomodule.c
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Original file line number Diff line number Diff line change
Expand Up @@ -730,9 +730,11 @@ PyInit__io(void)
"UnsupportedOperation", PyExc_OSError, PyExc_ValueError);
if (state->unsupported_operation == NULL)
goto fail;
if (PyModule_AddObject(m, "UnsupportedOperation",
Py_NewRef(state->unsupported_operation)) < 0)
if (PyModule_AddObjectRef(m, "UnsupportedOperation",
state->unsupported_operation) < 0)
{
goto fail;
}

/* BlockingIOError, for compatibility */
if (PyModule_AddObjectRef(m, "BlockingIOError",
Expand Down Expand Up @@ -785,7 +787,6 @@ PyInit__io(void)
return m;

fail:
Py_XDECREF(state->unsupported_operation);
Py_DECREF(m);
return NULL;
}