Biblatex example to cause error in biber with dynamic entries

gistfile1.md

When all citekeys are specified, dynamic citekeys are ignored. The following LaTeX example produces the effect.

For my mwe I have commented out the sections that must be changed to demonstrate the effect.

MWE

\documentclass[american]{article}
\usepackage{babel}
\usepackage{csquotes}
\usepackage[backend=biber, sorting=ydnt, subentry=true]{biblatex}
\usepackage{filecontents}
\begin{filecontents}{\jobname.bib}
  @inproceedings{key1,
    author = {Doe, John B. and Doe, Jane J.},
    title = {Designing alpha widgets for space use},
    booktitle = {Proceedings of the Acme Society 3rd Annual Conference},
    date = {2014-02-01}
  }
  @inproceedings{key2,
    author = {Doe, Jill J. and Doe, John B.},
    title = {Constructing alpha widgets for space use},
    booktitle = {Proceedings of the Acme Society 3rd Annual Conference},
    date = {2014-02-01}
  }
  @inproceedings{key3,
    author = {Doe, Jill J. and Doe, John B. and Smith, III, Arthur D.},
    title = {Benefits of alpha widgets for space use},
    booktitle = {Proceedings of the Acme Society 2nd Annual Conference},
    date = {2013-02-01}
  }
  % For Output 3:
  % @set{set1,
  %   entryset = {key1,key2}
  % }
\end{filecontents}

\addbibresource{\jobname.bib}

% \defbibentryset{set1}{key1,key2} % For Output 1 & 2

\begin{document}


% \nocite{*} % For Output 1 & 3
% \nocite{key1,key2,key3} % For Output 2

\printbibliography

\end{document}

Output

Output 1

Here the output does not group the key1 and key2 entries as would be expected. Adding \nocite{set1} in addition to \nocite{*} (which is redundant in multiple ways) gives an warning "Citation: 'set1' undefined."

Output 2

This performs as expected. In addition the \nocite macro can be used for any combination of (key1, key2, key3, and set1) with no warnings and the expected output. It is only when \nocite{*} is used that an error occurs.

Output 3

With the set defined statically in the .bib file, the output is identical to Output 2. Further, \nocite{*} no longer has any issues.