Issue #16431: Also fix the opposite direction.

Stefan Krah · Stefan Krah · commit ed16eff57eaf · 2012-11-07T23:47:19.000+01:00
diff --git a/Lib/test/test_decimal.py b/Lib/test/test_decimal.py
@@ -2052,6 +2052,10 @@ class MyDecimal(Decimal):
         self.assertIs(type(b), MyDecimal)
         self.assertEqual(a, b)
 
+        c = Decimal(b)
+        self.assertIs(type(c), Decimal)
+        self.assertEqual(a, c)
+
     def test_implicit_context(self):
         Decimal = self.decimal.Decimal
         getcontext = self.decimal.getcontext
diff --git a/Modules/_decimal/_decimal.c b/Modules/_decimal/_decimal.c
@@ -2345,7 +2345,7 @@ PyDecType_FromDecimalExact(PyTypeObject *type, PyObject *v, PyObject *context)
     PyObject *dec;
     uint32_t status = 0;
 
-    if (type == &PyDec_Type) {
+    if (type == Py_TYPE(v)) {
         Py_INCREF(v);
         return v;
     }

Original file line number	Diff line number	Diff line change
`@@ -2345,7 +2345,7 @@ PyDecType_FromDecimalExact(PyTypeObject type, PyObject v, PyObject *context)`
`2345`	`2345`	`PyObject *dec;`
`2346`	`2346`	`uint32_t status = 0;`
`2347`	`2347`
`2348`		`- if (type == &PyDec_Type) {`
	`2348`	`+ if (type == Py_TYPE(v)) {`
`2349`	`2349`	`Py_INCREF(v);`
`2350`	`2350`	`return v;`
`2351`	`2351`	`}`