Mixxx crashes on clicking on "Import metadata from MusicBrainz"

[Pradyuman]

When we try to import Metadata from MusicBrainz Mixxx crashes. I was using ubuntu 18.04 while I encounter this error. Output in terminal was:
ALSA lib pcm.c:2495:(snd_pcm_open_noupdate) Unknown PCM cards.pcm.rear
ALSA lib pcm.c:2495:(snd_pcm_open_noupdate) Unknown PCM cards.pcm.center_lfe
ALSA lib pcm.c:2495:(snd_pcm_open_noupdate) Unknown PCM cards.pcm.side
ALSA lib pcm_route.c:867:(find_matching_chmap) Found no matching channel map
ALSA lib pcm_route.c:867:(find_matching_chmap) Found no matching channel map
ALSA lib pcm_route.c:867:(find_matching_chmap) Found no matching channel map
ALSA lib pcm_route.c:867:(find_matching_chmap) Found no matching channel map
Warning [Thread (pooled)]: SoundSourceProxy - Unable to decode file ""
Segmentation fault (core dumped)

Computer Specs:
OS: Ubuntu 18.04
Processor: Intel i5 7th gen

[RJ Skerry-Ryan (rryan)]

Can you please post a backtrace?
https://www.mixxx.org/wiki/doku.php/creating_backtraces#linux_mac_os_x_with_xcode_4x

[RJ Skerry-Ryan (rryan)]

What version or branch of Mixxx are you using?

[Pradyuman (legendary-acp)]

I am currently using master branch.

[Pradyuman (legendary-acp)]

Backtrace file

[Uwe Klotz (uklotzde-deactivatedaccount)]

Occurs for missing files.

[Uwe Klotz (uklotzde-deactivatedaccount)]

https://github.com/mixxxdj/mixxx/pull/1826

[Swiftb0y (swiftb0y)]

Mixxx now uses GitHub for bug tracking. This bug has been migrated to:
https://github.com/mixxxdj/mixxx/issues/9456