fix to possible bug running python callbacks - bpy.app.handlers.* to support handlers...

diff --git a/source/blender/python/intern/bpy_app_handlers.c b/source/blender/python/intern/bpy_app_handlers.c
index 54848161b89612ca5fec7ca0f574502febb662ce..2974e3cf3cb62e1493eb5303aa3304bbf8d3852f 100644 (file)
--- a/source/blender/python/intern/bpy_app_handlers.c
+++ b/source/blender/python/intern/bpy_app_handlers.c
@@ -279,8 +279,7 @@ void BPY_app_handlers_reset(const short do_all)
 void bpy_app_generic_callback(struct Main *UNUSED(main), struct ID *id, void *arg)
 {
        PyObject *cb_list = py_cb_array[GET_INT_FROM_POINTER(arg)];
-       Py_ssize_t cb_list_len;
-       if ((cb_list_len = PyList_GET_SIZE(cb_list)) > 0) {
+       if (PyList_GET_SIZE(cb_list) > 0) {
                PyGILState_STATE gilstate = PyGILState_Ensure();
 
                PyObject *args = PyTuple_New(1); // save python creating each call
@@ -299,8 +298,9 @@ void bpy_app_generic_callback(struct Main *UNUSED(main), struct ID *id, void *ar
                        Py_INCREF(Py_None);
                }
 
-               // Iterate the list and run the callbacks
-               for (pos = 0; pos < cb_list_len; pos++) {
+               /* Iterate the list and run the callbacks
+                * note: don't store the list size since the scripts may remove themselves */
+               for (pos = 0; pos < PyList_GET_SIZE(cb_list); pos++) {
                        func = PyList_GET_ITEM(cb_list, pos);
                        ret = PyObject_Call(func, args, NULL);
                        if (ret == NULL) {