Micro optimization. In the first case, we know that frame->f_exc_type

is NULL, so there's no reason to do anything with it.  In the second case,
we know frame->f_exc_type is not NULL, so we can just do an INCREF.

diff --git a/Python/ceval.c b/Python/ceval.c
index bfc6108390d1d497ffc17952d85aa38344ebac11..d24241465a657b663880e4a8215d45ff2be58fdd 100644 (file)
--- a/Python/ceval.c
+++ b/Python/ceval.c
@@ -2899,7 +2899,6 @@ set_exc_info(PyThreadState *tstate,
                        Py_INCREF(Py_None);
                        tstate->exc_type = Py_None;
                }
-               tmp_type = frame->f_exc_type;
                tmp_value = frame->f_exc_value;
                tmp_tb = frame->f_exc_traceback;
                Py_XINCREF(tstate->exc_type);
@@ -2908,7 +2907,6 @@ set_exc_info(PyThreadState *tstate,
                frame->f_exc_type = tstate->exc_type;
                frame->f_exc_value = tstate->exc_value;
                frame->f_exc_traceback = tstate->exc_traceback;
-               Py_XDECREF(tmp_type);
                Py_XDECREF(tmp_value);
                Py_XDECREF(tmp_tb);
        }
@@ -2942,7 +2940,7 @@ reset_exc_info(PyThreadState *tstate)
                tmp_type = tstate->exc_type;
                tmp_value = tstate->exc_value;
                tmp_tb = tstate->exc_traceback;
-               Py_XINCREF(frame->f_exc_type);
+               Py_INCREF(frame->f_exc_type);
                Py_XINCREF(frame->f_exc_value);
                Py_XINCREF(frame->f_exc_traceback);
                tstate->exc_type = frame->f_exc_type;