Fix byte slices using the same underlying array #270
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Nepomuk5665
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Jan 23, 2026
When decoding binary fixed types, the returned byte slice was a subslice of the input buffer. This meant all decoded fixed values shared the same underlying array, causing unexpected behavior when appending to these slices - modifications could affect other decoded values or the original input buffer. This is the same issue as linkedin#269 but for the fixed type. PR linkedin#270 fixes the bytes type but does not address the fixed type which has the same problem. The fix allocates a new slice and copies the data, ensuring each decoded fixed value has its own independent backing array.
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This PR ensures that a new byte slice is created in
bytesNativeFromBinaryinstead of reusing the same byte slice as the input buffer. It ensures that the created slice is referencing its own underlying array and makes any changes of that field safe (i.e. the changes won't affect the input buffer or any other fields in the decoded value).Fixes #269.