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Mark Dickinson committed 67c33cb

Issue #8627: Fix "XXX undetected error" from unchecked PyErr_WarnPy3k return.
This is just a quick fix: if the warning is turned into an exception, the
exception simply gets ignored.

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Files changed (2)

 -----------------
 
 - Issue #8627: Remove bogus "Overriding __cmp__ blocks inheritance of
-  __hash__ in 3.x" warning.
+  __hash__ in 3.x" warning.  Also fix "XXX undetected error" that
+  arises from the "Overriding __eq__ blocks inheritance ..." warning
+  when turned into an exception: in this case the exception simply
+  gets ignored.
 
 - Issue #8748: Fix two issues with comparisons between complex and integer
   objects.  (1) The comparison could incorrectly return True in some cases

Objects/typeobject.c

                                 (base->tp_hash != PyObject_HashNotImplemented) &&
                                 !OVERRIDES_HASH(type)) {
                     if (OVERRIDES_EQ(type)) {
-                        PyErr_WarnPy3k("Overriding "
-                          "__eq__ blocks inheritance "
-                          "of __hash__ in 3.x",
-                          1);
+                        if (PyErr_WarnPy3k("Overriding "
+                                           "__eq__ blocks inheritance "
+                                           "of __hash__ in 3.x",
+                                           1) < 0)
+                            /* XXX This isn't right.  If the warning is turned
+                               into an exception, we should be communicating
+                               the error back to the caller, but figuring out
+                               how to clean-up in that case is tricky.  See
+                               issue 8627 for more. */
+                            PyErr_Clear();
                     }
                 }
             }