Had an occasion where Picard repeatedly crashed on a Lookup for a particular album of FLAC files.  This is the only album of 20 or so that has crashed so far with this Picard version. 

The filenames were normal characters and the path length was typical.  This same album could cluster okay, and it also scanned okay as well - with a caveat: one scan failed (crashed as above) while I was troubleshooting, but that was it.  In the end, I was able to complete tagging for this album after a successful scan.

To doc the crash, I started Picard in debug mode within an admin command window.  I loaded the album, allowed it to cluster, then selected Lookup.  The app crashed as expected.  I copied the text from the command window and have attached it.

My plugins are:  Additional Artist Variables, Feat. Artists in Titles, Load As Non-album Track, Padded disc and tracknumbers, and Replace forbidden symbols.

I'm assuming scripts haven't been called yet before the crash, but if you'd like those or anything else, plz let me know.