Fix issue with reading zero bytes in Gzip_read. pg_dump expects a read request of zero bytes to be a no-op; see for example ReadStr(). Gzip_read got this wrong and falsely supposed that the resulting gzret == 0 indicated an error. We could complicate that error-checking logic some more, but it seems best to just fall out immediately when passed size == 0.
This bug breaks the nominally-supported case of manually gzip'ing the toc.dat file within a directory-style dump, so back-patch to v16 where this code came in. (Prior branches already have a short-circuit for size == 0 before their only gzread call.) Author: Tom Lane <[email protected]> Reviewed-by: Chao Li <[email protected]> Discussion: https://postgr.es/m/[email protected] Backpatch-through: 16 Branch ------ master Details ------- https://git.postgresql.org/pg/commitdiff/a239c4a0c22627a45c0a91d2f4d9755bbc5be7be Modified Files -------------- src/bin/pg_dump/compress_gzip.c | 4 ++++ 1 file changed, 4 insertions(+)
