Handle eof and missing ihdr in png decoder#1718
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SimonCropp merged 3 commits intomainfrom Apr 16, 2026
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Replace ReadExact with ReadAtLeast to detect EOF and break out of the chunk loop cleanly for truncated/streaming inputs. Stop processing if a chunk length is too large (break instead of throwing). Add an explicit check that IHDR was seen and throw if missing. Rewind idat.Position before calling Reconstruct so the IDAT stream is read from the start.
This was referenced Apr 16, 2026
This was referenced Apr 17, 2026
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