dot doesn't recognize any formats

Question

My installation of graphviz 2.36.0-0ubuntu3 doesn't seem to support any output formats:

$ dot -Tpng
Format: "png" not recognized. Use one of:
$ dot -Tsvg 
Format: "svg" not recognized. Use one of:

I.o.w., the list of output formats is simply empty. Do I need to install some extra packages? The package doesn't recommend or suggest anything that looks like support for additional formats.

Solution

Found it. Issuing just a bare dot command explains the problem:

$ dot
There is no layout engine support for "dot"
Perhaps "dot -c" needs to be run (with installer's privileges) to register the plugins?

So, I did

sudo dot -c

which, judging from the output of just dot -c, writes a configuration file to /usr/lib/graphviz/config6. Clearly a bug in the package's install script.

Comments

[Olumide]

My config6 file wasn't empty so I renamed it and ran sudo dot -c again and this fixed the problem. Perhaps the config6 was corrupt?