incomprehensible return error bug?

[strtr]

strtr Wrote:

> enum { A = 0, B, C }
> 
> void func(){ return A; }
> 
> void main()
> {
> }
> 
> main.d(1): Error: long has no effect in expression (0)
> 
> Is this a bug?

This error also points to the enum which is probably incorrectly used somewhere
s_def(32) Error: cannot implicitly convert expression (5) of type int to S

Still searching for the original bug btw :(