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…(nil, adler)
For a nil string the checksum was computed as crc32(crc, NULL, 0), but zlib returns the initial value whenever the buffer is NULL, discarding the running value that was passed in.
```ruby
Zlib.crc32(nil, 1234)
# expected: 1234 (as Zlib.crc32("", 1234))
# actual: 0
Zlib.adler32(nil, 1234)
# expected: 1234
# actual: 1
```
Co-Authored-By: Claude Mythos 5.1 <noreply@anthropic.com>
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For a nil string the checksum was computed as
crc32(crc, NULL, 0), but zlib returns the initial value whenever the buffer isNULL, discarding the running value that was passed in.