pavucontrol crashes with segfault in wayland

Hi,

I'm new to this community, tell me if I'm doing something wrong. Thank you.

So I use pavucontrol in sway/wayland on nixos 19.09 and it crashes when moving the "output devices" slider. I'm on version 3.0.

I'm not sure how to proceed now (proper bug report).

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Edit: For the record: I was not yet able to reproduce this issue with another slider, the per-app slider works for me so far.