Bug#719142: postinstall: argument expected

[Pavel Reznicek]

Hi,

   hitting the same problem, it looks like the error message is actually a 
bug in bash. Probing the postinst script, I incidentally found out that my 
default /bin/sh is pointing to bash instead of dash and the script works 
in dash correctly.

PS: I am not sure how bash happened to be my default shell, I do not 
remember confirming such selection, while I do remember switching to dash 
long time ago. Anyway, to fix that one just needs to run `dpkg-reconfigure 
dash` and confirm it to be the default system shell (hope it will survive 
future bash and dash updates...)

Cheers,
Pavel