1 files changed, 8 insertions, 0 deletions
diff --git a/Modules/_winapi.c b/Modules/_winapi.c
index 1b28adb..e1672c4 100644
--- a/Modules/_winapi.c
+++ b/Modules/_winapi.c
@@ -1080,6 +1080,14 @@ _winapi_CreateProcess_impl(PyObject *module,
         return NULL;
     }
 
+    PyInterpreterState *interp = PyInterpreterState_Get();
+    const PyConfig *config = _PyInterpreterState_GetConfig(interp);
+    if (config->_isolated_interpreter) {
+        PyErr_SetString(PyExc_RuntimeError,
+                        "subprocess not supported for isolated subinterpreters");
+        return NULL;
+    }
+
     ZeroMemory(&si, sizeof(si));
     si.StartupInfo.cb = sizeof(si);