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lib/model: Prevent infinite index sending loop (fixes #9407) (#9458)

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Explanation of what/why in a code comment.

Fixes https://github.com/syncthing/syncthing/issues/9407
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Simon Frei 2024-03-10 22:28:40 +01:00 committed by GitHub
parent 2ab2488274
commit 73cc5553b6
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1 changed files with 6 additions and 5 deletions
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lib/model/indexhandler.go
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@ -295,12 +295,13 @@ func (s *indexHandler) sendIndexTo(ctx context.Context, fset *db.FileSet) error
err = batch.Flush() err = batch.Flush()
// True if there was nothing to be sent // Use the sequence of the snapshot we iterated as a starting point for the
if f.Sequence == 0 { // next run. Previously we used the sequence of the last file we sent,
return err // however it's possible that a higher sequence exists, just doesn't need to
} // be sent (e.g. in a receive-only folder, when a local change was
// reverted). No point trying to send nothing again.
s.prevSequence = snap.Sequence(protocol.LocalDeviceID)
s.prevSequence = f.Sequence
return err return err
} }