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The original design of QIOTask was intended to simplify lifecycle management by automatically freeing it when the task was marked as complete. This overlooked the fact that when a QIOTask is used in combination with a GSource, there may be times when the source callback is never invoked. This is typically when a GSource is released before any I/O event arrives. In such cases it is not desirable to mark a QIOTask as complete, but it still needs to be freed. To satisfy this, the task must be released manually. Reviewed-by: Marc-André Lureau <marcandre.lureau@redhat.com> Signed-off-by: Daniel P. Berrangé <berrange@redhat.com> (cherry picked from commit 403d3a5f4a2d86bfe1f1f33aa337f2eb3a71182b) Signed-off-by: Michael Tokarev <mjt@tls.msk.ru>