coreaudio::audio_unit::render_callback::action_flags::POST_RENDER_ERROR

pub const POST_RENDER_ERROR: ActionFlags = ActionFlags{bits: au::kAudioUnitRenderAction_PostRenderError,}

If this flag is set on the post-render call an error was returned by the audio unit's render operation. In this case, the error can be retrieved through the lastRenderError property and the audio data in ioData handed to the post-render notification will be invalid.

Available in OS X v10.5 and later.