Can't use an undefined value as an ARRAY reference

[kleinschmidt]

Since upgrading to 2.8 (and still on 2.9), I'm getting the following error when trying to extract cited refs to a .bib file. (this runs fine in my normal latexmk workflow, without the --output_format=bibtex, producing a .bbl file).

Omitting some warnings (which I think are about ISBNs and duplicate keys and I think unrelated):

➜ biber --output_format=bibtex talker-variability.bcf
INFO - This is Biber 2.9
INFO - Logfile is 'talker-variability.blg'
INFO - Reading 'talker-variability.bcf'
INFO - Found 76 citekeys in bib section 0
INFO - Looking for bibtex format file 'talker-variability.bib'
INFO - LaTeX decoding ...
INFO - Found BibTeX data source 'talker-variability.bib'
WARN - BibTeX subsystem: /tmp/cRfLN_Zqdw/talker-variability.bib_23427.utf8, line 8, warning: 194 characters of junk seen at toplevel
Can't use an undefined value as an ARRAY reference at /tmp/par-64617665/cache-975de9a2a2c44ccaa5329d9695a54026ffc29f68/inc/lib/Biber/Internals.pm line 1100.

Apologies for the lack of a MRE, but I've uploaded the bcf and bib files here as a gist. If I find the time I'll try to chase down a MRE.

[plk]

That .bcf file you are using - was this generated with biber <2.8? The format has changed in 2.8 which I suspect is your problem.

[kleinschmidt]

Nope, it's generated with 2.8.

[plk]

Please try biber 2.10 DEV version from the development folder on Sourceforge. This was a bug.

[kleinschmidt]

Works great! Thanks for the quick fix.

[3e4]

I had same problem with 2.9, and 2.10 fixed it. Here is the link to the binaries
https://sourceforge.net/projects/biblatex-biber/files/biblatex-biber/2.10/binaries/