track pegs mixxx at 100% when adding to library

[Igor]

1. start with a fresh install of mixxx (i removed my `.mixxx` directory)
2. add a library that is just a single directory containing this track: https://igor.moomers.org/random/of%20porcelain%20--%20and%20here%20i%20am%20free%20(original%20mix).mp3
3. mixxx cpu becomes 100% and the file is never added to the track list

this is on ubuntu 19.04 disco. i've built mixxx 2.2.1 with scons but the same issue occurs with 2.2.0 from the default repository as well as on 2.1.8 that i also built from source.

[Igor (igor47)]

this is what the output of `mixxx --developer` looks like:

Debug [LibraryScanner 1]: LibraryScanner - slotStartScan()
Debug [LibraryScanner 1]: LibraryScanner - Recursively scanning library.
Debug [LibraryScanner 1]: SqlTransaction - Started new SQL database transaction on "MIXXX-2"
Debug [Thread (pooled)]: Importing track "/home/igor47/Music/music/of porcelain/and here i am free (original mix).mp3"
Debug [LibraryScanner 1]: GlobalTrackCache - Resolving track by canonical location "/home/igor47/Music/music/of porcelain/and here i am free (original mix).mp3"
Debug [LibraryScanner 1]: GlobalTrackCache - Cache miss - allocating track ["/home/igor47/Music/music/of porcelain/and here i am free (original mix).mp3" | "/home/igor47/Music/music/of porcelain/and here i am free (original mix).mp3" | -1]
Debug [LibraryScanner 1]: GlobalTrackCache - Cache miss - inserting new track into cache ["/home/igor47/Music/music/of porcelain/and here i am free (original mix).mp3" | "/home/igor47/Music/music/of porcelain/and here i am free (original mix).mp3" | -1] QObject(0x0)
Debug [LibraryScanner 1]: SoundSourceProxy - SoundSourceProvider "MAD: MPEG Audio Decoder" created a SoundSource for file "file:///home/igor47/Music/music/of porcelain/and here i am free (original mix).mp3" of type "mp3"

[Uwe Klotz (uklotzde-deactivatedaccount)]

Confirmed. Caused by an invalid BPM value (NaN).

[Uwe Klotz (uklotzde-deactivatedaccount)]

This bug also affects 2.1.8.

[Uwe Klotz (uklotzde-deactivatedaccount)]

https://github.com/mixxxdj/mixxx/pull/2157

[Swiftb0y (swiftb0y)]

Mixxx now uses GitHub for bug tracking. This bug has been migrated to:
https://github.com/mixxxdj/mixxx/issues/9671