convert: crash bug when conversion fails?

I have an album in m4a format (encoded by iTunes from CD, I think) - Cafe de Flore. Beets shows me the suggested match and I choose to "apply".

Then after reviewing a few more albums, I think the convert plugin that has finally caught up and starts to encode Cafe de Flore. I see some errors written to stdout which make it difficult to see/use the last input prompt (doesn't actually overwrite anything, just visual clutter).

Started encoding /Users/tailee/dataset/Music.iTunes/Compilations/Café De Flore - Rendez-Vous A Saint-Germain-Des-Prés/01 I Feel Blue.m4a
Encoding /Users/tailee/dataset/Music.iTunes/Compilations/Café De Flore - Rendez-Vous A Saint-Germain-Des-Prés/01 I Feel Blue.m4a failed. Cleaning up...

The prompt is still active though, beets re-prompts me to make a valid choice, but when I "apply" my choice I get another error to stdout and beets returns to the command line with no further warning.

Error: No such file or directory while reading '/var/folders/mg/cchdwz113c3gfxgnc0h9_skm0000gn/T/tmpDw27DQ.mp3'