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 Task.reportError.
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.