In Zlib::GzipReader#eof? check if we're actually at eof #72
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Only consider it eof if we read ahead and something fills the buf. If not, we may only have empty blocks and the footer. Fixes ruby#56
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In Zlib::GzipReader#eof? check if we're actually at eof
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When checking for
eof?, read ahead until we can confidently say that either there is more content or the stream is finished. If reading ahead fills thez->buf, we are not at eof.It's possible that only empty blocks or the footer remain to be read from the input stream. If
eof?is only based on current status of the stream, a following read may produce no output, causing an EOFError because there's nothing left to return. This only happens for very specific gzip file lengths that hit exactly at a modulo of the read size, leaving only empty blocks and the footer remaining to be read.Fixes #56