The patch is *almost* okay.

errno = 0;
 	div = c_quot(v->cval,w->cval); /* The raw divisor value. */
 	if (errno == EDOM) {
-		PyErr_SetString(PyExc_ZeroDivisionError, "complex remainder");
+		PyErr_SetString(PyExc_ZeroDivisionError, "complex modulo by zero");
 		return NULL;


It should be as expressed in the code above. In the patch, the fixed
string is "complex remainder by zero", but this is broken English. I
propose "complex modulo by zero". Please fix your patch and we're good.