GH-104584: Restore frame->stacktop on optimizer error (GH-108953)

Misc/NEWS.d/next/Core and Builtins/2023-09-05-11-31-27.gh-issue-104584.IRSXA2.rst

@@ -0,0 +1,2 @@
+Fix a crash when running with :envvar:`PYTHONUOPS` or :option:`-X uops <-X>`
+enabled and an error occurs during optimization.

Python/optimizer.c

@@ -169,6 +169,7 @@ _PyOptimizer_BackEdge(_PyInterpreterFrame *frame, _Py_CODEUNIT *src, _Py_CODEUNI
     if (err <= 0) {
         assert(executor == NULL);
         if (err < 0) {
+            _PyFrame_SetStackPointer(frame, stack_pointer);
             return NULL;
         }
         goto jump_to_destination;