I have a problem with biber (2.1) and german umlauts. My bibliography Thesis.bib has only one entry:

```
   @article{cite1,
   author = {G{\"{o}}, A.},
   journal = {journal},
   title = {{lalelu}},
   }

```

And my main.tex file is:

```
    \documentclass[ngerman]{scrreprt}
    \PassOptionsToPackage{backend=biber}{biblatex}
    \usepackage{biblatex}
    \addbibresource{Thesis.bib}
    \begin{document}
    \cite{cite1}
    \printbibliography
    \end{document}

```

I compile via pdflatex main && biber main. The output of biber is

```
INFO - This is Biber 2.1
INFO - Logfile is 'main.blg'
INFO - Reading 'main.bcf'
INFO - Found 1 citekeys in bib section 0
INFO - Processing section 0
INFO - Looking for bibtex format file 'Thesis.bib' for section 0
INFO - Decoding LaTeX character macros into UTF-8

```

with exit code 1. 
When I remove the umlaut from the author line in Thesis.bib everything is fine. 
It doesn't make a difference if the umlaut is an another field of the bib entry and I have the same problem with \% and \&.

I'm using OSX 10.11 with texlive2015 from MacPorts.

Has somebody encountered a similar problem?

Best wishes,
Peter