bibtex hangs on some accents

[ejeandel]

The following MWE shows a document on which tectonic fails. Specifically it hangs while bibtexing.

\documentclass{article}
\begin{document}
\cite{buchi}
\bibliographystyle{alpha}
\bibliography{biblio}
\end{document}

The biblio.bib file is:

@Article{buchi,
  author = {Julius Richard B{\"u}chi},
  title = "{Turing-Machines and the Entscheidungsproblem}",
  journal = "Math. Annalen",
  year = "1962",
}

Notes: it doesn't hang if alpha is replaced by plain. It also doesn't hang when B{\"u}chi is replaced by Büchi.

Note: while not hanging, tectonic says "warning: internal consistency problem when checking if xxx.bbl changes", any idea why ?

Thanks,

E.

[CraftSpider]

I think I encountered this as a bug and fixed it in #1163. I'll attempt to extract the fix as a small patch and PR it separately, see if that fixes this issue.

[cgahr]

I have the same issue when I try to cite scipy:

@ARTICLE{2020SciPy-NMeth,
  author  = {Virtanen, Pauli and Gommers, Ralf and Oliphant, Travis E. and
            Haberland, Matt and Reddy, Tyler and Cournapeau, David and
            Burovski, Evgeni and Peterson, Pearu and Weckesser, Warren and
            Bright, Jonathan and {van der Walt}, St{\'e}fan J. and
            Brett, Matthew and Wilson, Joshua and Millman, K. Jarrod and
            Mayorov, Nikolay and Nelson, Andrew R. J. and Jones, Eric and
            Kern, Robert and Larson, Eric and Carey, C J and
            Polat, {\.I}lhan and Feng, Yu and Moore, Eric W. and
            {VanderPlas}, Jake and Laxalde, Denis and Perktold, Josef and
            Cimrman, Robert and Henriksen, Ian and Quintero, E. A. and
            Harris, Charles R. and Archibald, Anne M. and
            Ribeiro, Ant{\^o}nio H. and Pedregosa, Fabian and
            {van Mulbregt}, Paul and {SciPy 1.0 Contributors}},
  title   = {{{SciPy} 1.0: Fundamental Algorithms for Scientific
            Computing in Python}},
  journal = {Nature Methods},
  year    = {2020},
  volume  = {17},
  pages   = {261--272},
  adsurl  = {https://rdcu.be/b08Wh},
  doi     = {10.1038/s41592-019-0686-2},
}

In particular, removing {\.I} seems to fix the error!