Bug 429283

SUMMARY

baloosearch returns duplicate results.

```sh
$ baloosearch example | grep work | grep managed
/home/peter/org/work/shared/managed_services.org
/home/peter/org/work/shared/managed_services.org
/home/peter/org/work/shared/managed_services.org
/home/peter/org/work/shared/managed_services.org
Elapsed: 2.1973 msecs
```

Almost all the files are duplicated:

```sh
$ baloosearch example | wc -l                   
Elapsed: 2.20035 msecs
663

$ baloosearch example | sort -u | wc -l
Elapsed: 2.25017 msecs
202
```

STEPS TO REPRODUCE
1. enable baloo
2. let it index
3. search for something
4. notice the duplicate results

OBSERVED RESULT

```sh
$ baloosearch example | grep work | grep managed
/home/peter/org/work/shared/managed_services.org
/home/peter/org/work/shared/managed_services.org
/home/peter/org/work/shared/managed_services.org
/home/peter/org/work/shared/managed_services.org
Elapsed: 2.1973 msecs
```
EXPECTED RESULT

```sh
$ baloosearch example | grep work | grep managed
/home/peter/org/work/shared/managed_services.org
Elapsed: 2.1973 msecs
```

SOFTWARE/OS VERSIONS
Linux/KDE Plasma: NixOS unstable
KDE Plasma Version: 5.73
KDE Frameworks Version: plasma 5.18.5
Qt Version: 5.15.0

ADDITIONAL INFORMATION

I have been observing this for a long time on multiple systems.

Wiping the local store and letting it reindex doesn't help.