Comment # 3 on bug 1191642 from Matthias Fehring

Same here, but with SDDM and also on tty. Removing pam_mount helps, but it
seems not to be pam_mount itself because also mount.crypt does not work for me
when using it directly to mount a LUKS2 partition. Both give 

```
free(): double free detected in tcache 2
Aborted (core dumped)
```