gh-76785: Print the Traceback from Interpreter.run() (gh-110248)

ericsnowcurrently · web-flow · commit 6bc889aedc11 · 2023-10-03T14:41:02.000-06:00
This is a temporary fix. The full fix may involve serializing the traceback in some form.
diff --git a/Modules/_xxsubinterpretersmodule.c b/Modules/_xxsubinterpretersmodule.c
@@ -450,6 +450,10 @@ _run_script(PyInterpreterState *interp, const char *codestr,
                 "RunFailedError: script raised an uncaught exception (%s)",
                 failure);
     }
+    // XXX Instead, store the rendered traceback on sharedexc,
+    // attach it to the exception when applied,
+    // and teach PyErr_Display() to print it.
+    PyErr_Display(NULL, excval, NULL);
     Py_XDECREF(excval);
     if (errcode != ERR_ALREADY_RUNNING) {
         _PyInterpreterState_SetNotRunningMain(interp);
