Fix typo#120
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Thank you - I will fix typos as I encounter them for the upcoming release. |
govtech42
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Closes gitpython-developers#120 DecompressMemMapReader.read(N) could return b'' mid-stream when zlib consumed input without producing output on a single decompress call (small N, header / dictionary frames in flight). The original `if dcompdat and ...` guard at the recursion site skipped the "refill to size" recursion in that case, so a caller using the standard idiom while chunk := stream.read(4096): yield chunk terminated at the first empty chunk -- before _br == _s. The guard exists for compressed_bytes_read(), which manipulates _br=0 and then drains the inner zip past its EOF. Recursing there would loop forever because the inner zip is already done. The fix uses zlib's own `eof` attribute (available on standard zlib.Decompress objects since Python 3.6) to distinguish: - dcompdat empty AND zip not at EOF -> still digesting, recurse - dcompdat empty AND zip at EOF -> compressed_bytes_read scrub or genuine EOF; do not recurse. `getattr(_zip, 'eof', False)` keeps the conservative behavior when running against a custom zlib object that does not expose the attribute. Adds a regression test that reads with chunk_size in {1, 4, 16, 64} from a 13 KB highly-compressible stream. With the old guard, the chunk_size <= 16 cases stopped at byte 0; the new test asserts they read all 13000 bytes. The full existing test suite (24 tests) still passes, including test_decompress_reader_special_case and test_pack which exercise the compressed_bytes_read scrub path that the original guard existed to protect.
govtech42
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…ty-read-before-eof Fix DecompressMemMapReader.read returning b'' before EOF (gitpython-developers#120)
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