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<title>PNG Third Edition: Decoder error recovery, invalid ancillary</title>
<link rel="author" title="Chris Lilley" href="mailto:chris@w3.org">
<link rel="help" href="https://www.w3.org/TR/png-3/#13Decoders.Errors">
<link rel="help" href="https://github.com/w3c/PNG-spec/issues/320">
<link rel="match" href="unknown-ancillary-error-recovery-ref.html">
<meta name="assert" content="Encountering an unknown ancillary chunk is never an error. The chunk can simply be ig