Lee Brotherston

Missing filesystem mutexes & mutex debugging

1

## Background I noticed a number of filesystem issues which seem to be consistent with data being incorrectly written to disk, potentially due to race conditions and suchlike, and so...

pkg checksum mismatch

2

### Description On multiple versions of the pkg I get errors such as (obviously different values for different versions, but you get the idea): ``` verifying github.com/charmbracelet/x/[email protected]: checksum mismatch downloaded:...

### Observed behavior There are multiple places in `server/filestore.go` where the file `.Sync()` call is used: https://github.com/search?q=repo%3Anats-io%2Fnats-server%20%22.Sync()%22%20path%3Aserver%2Ffilestore.go&type=code This call returns an error, or nil if no error: https://pkg.go.dev/os#File.Sync However, this...