Reports an error in an idle function. Similar to g_simple_async_report_error_in_idle(), but takes a #GError rather than building a new one.
a #GObject, or %NULL
a #GAsyncReadyCallback.
user data passed to @callback.
the #GError to report
Deprecated: Use g_task_report_error().
See Implementation
Reports an error in an idle function. Similar to g_simple_async_report_error_in_idle(), but takes a #GError rather than building a new one.