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repository: fix zero-sized blobs in v2 repos

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This commit is contained in:
Michael Eischer
2026-06-10 22:01:32 +02:00
parent 16b8b8cda0
commit 0fc7444e32
1 changed files with 4 additions and 2 deletions
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internal/repository/repository.go
+4 -2
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@@ -380,11 +380,13 @@ func (r *Repository) saveAndEncrypt(ctx context.Context, t restic.BlobType, data
uncompressedLength := 0
if r.cfg.Version > 1 {
// we have a repo v2, so compression is available. if the user opts to
// not compress, we won't compress any data, but everything else is
// compressed.
if r.opts.Compression != CompressionOff || t != restic.DataBlob {
// uncompressedLength != 0 is used to indicate compressed data. Thus, a zero-sized blob
// cannot be compressed. This special case is only relevant for tests, normal operation does not
// generate zero-sized blobs.
if len(data) > 0 && (r.opts.Compression != CompressionOff || t != restic.DataBlob) {
uncompressedLength = len(data)
data = r.getZstdEncoder().EncodeAll(data, nil)
}