And now for my next trick ...

[Jesse Meek]

After checking the import grouping I became curious as to what else I 
could check. So, while on holiday, I wrote another script to check if 
errors are being discarded. It uses the ast package to check for both 
assignment statements, where a value of type "error" is being assigned 
to a variable of name "_" and non-assignment expression statements that 
return at least one value of type "error".

The results were disappointing, for me, but good for Juju. It only 
picked up one case:

environs/config.go:48-51

     p, _ := Provider(kind)
     if p == nil {
         return fmt.Errorf("environment %q has an unknown provider type 
%q", rawEnviron["name"], kind)
     }

So, not a huge revelation, but good to know we are not discarding errors 
at least. :)