Merged revisions 71024,71058 via svnmerge from

svn+ssh://pythondev@svn.python.org/python/trunk

........
  r71024 | georg.brandl | 2009-04-02 04:47:44 +0200 (Do, 02 Apr 2009) | 4 lines

  In PyErr_GivenExceptionMatches, temporarily bump the recursion
  limit, so that in the most common case PyObject_IsSubclass will
  not raise a recursion error we have to ignore anyway.
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  r71058 | georg.brandl | 2009-04-02 20:09:04 +0200 (Do, 02 Apr 2009) | 3 lines

  PyErr_NormalizeException may not set an error, so convert the PyErr_SetObject
  call on hitting the recursion limit into just assigning it to the arguments provided.
........

1 files changed, 9 insertions, 1 deletions

diff --git a/Python/errors.c b/Python/errors.c
index 63353881b0..cccc0f7778 100644
--- a/Python/errors.c
+++ b/Python/errors.c
@@ -279,7 +279,15 @@ finally:
 	tstate = PyThreadState_GET();
 	if (++tstate->recursion_depth > Py_GetRecursionLimit()) {
 	    --tstate->recursion_depth;
-	    PyErr_SetObject(PyExc_RuntimeError, PyExc_RecursionErrorInst);
+	    /* throw away the old exception... */
+	    Py_DECREF(*exc);
+	    Py_DECREF(*val);
+	    /* ... and use the recursion error instead */
+	    *exc = PyExc_RuntimeError;
+	    *val = PyExc_RecursionErrorInst;
+	    Py_INCREF(*exc);
+	    Py_INCREF(*val);
+	    /* just keeping the old traceback */
 	    return;
 	}
 	PyErr_NormalizeException(exc, val, tb);