Interpreter crashes when chaining an infinite number of exceptions

Python/ceval.c

Index: Python/ceval.c
===================================================================
--- Python/ceval.c	(revision 72313)
+++ Python/ceval.c	(working copy)
@@ -601,17 +601,19 @@
 		return 0;
 	if (tstate->overflowed) {
 		if (tstate->recursion_depth > recursion_limit + 50) {
-			/* Overflowing while handling an overflow. Give up. */
-			Py_FatalError("Cannot recover from stack overflow.");
+			/* Overflowing while handling an overflow.
+			 * Use the prebuilt exception object. */
+			PyErr_SetObject(PyExc_RuntimeError, PyExc_RecursionErrorInst);
+			--tstate->recursion_depth;
+			return -1;
 		}
-		return 0;
 	}
 	if (tstate->recursion_depth > recursion_limit) {
-		--tstate->recursion_depth;
 		tstate->overflowed = 1;
 		PyErr_Format(PyExc_RuntimeError,
 			     "maximum recursion depth exceeded%s",
 			     where);
+		--tstate->recursion_depth;
 		return -1;
 	}
 	return 0;