Wrong stats of `pragma(inline, true)`-functions when compiling with `-cov` flag

[Per Nordlöw]

I've noticed that the results of

     dmd -cov

are incorrect for inline-functions such as

void f()
{
     pragma(inline, true);
     ...
}

eventhough I feed `dmd` neither the `-O` nor `-inline` nor 
`-release` flag.

The problem goes away when I remove the `pragma(inline, 
true)`-directives from the affected function.

Is this a know issue?