I also just got this when upgrading and it turned out that my /var/lib/dpkg/alternatives/pc file was somehow broken. I purged fp-compiler and deleted the file, and reinstalling now worked (I have no other pc installed at all!)
This was the contents of the file: auto /usr/bin/pc fpc.1.gz /usr/share/man/man1/pc.1.gz /usr/bin/fpc 20 /usr/share/man/man1/fpc.1.gz I don't know anything about the alternatives system, maybe you know what broke it. johannes
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